• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A camera (1) for industrial image processing with a camera module (2) and a detachably connected lens module (3) with an optical system having at least one optical lens preferably comprises an image sensor (21) for capturing an image in the camera module (2) and a camera control unit (24) for controlling the camera module (2) and / or the lens module (3) and in the lens module (3) a memory unit (33) with lens data, wherein in the camera module (2) and in the lens module (3) cooperating wireless Nahfeldkommunikation (25, 35) are provided, wherein the near field communication unit (35) in the lens module (3) of the Nahfeldkommunikationseinheit (25) in the camera module (2) emitted electromagnetic alternating field into electrical energy for powering the lens module (3) converts and the camera module (2 ) reads out the lens data via the near-field communication units (25, 35) and the camera control unit (24) thus determines a function of the K ameramoduls (2) and / or the lens module (3) controls.
    公开号:AT519192A1
    申请号:T50838/2016
    申请日:2016-09-19
    公开日:2018-04-15
    发明作者:Ing Dipl (Fh) Andreas Waldl
    申请人:B & R Ind Automation Gmbh；
    IPC主号:
    专利说明:

    Summary
    A camera (1) for industrial image processing with a camera module (2) and a lens module (3) detachably connected thereto with an optical system with at least one optical lens, preferably comprises an image sensor (21) in the camera module (2) for recording an image and a camera control unit (24) for controlling the camera module (2) and / or the lens module (3) and in the lens module (3) a storage unit (33) with lens data, wireless near-field communication units interacting in the camera module (2) and in the lens module (3) (25, 35) are provided, the near-field communication unit (35) converting an electromagnetic alternating field emitted in the lens module (3) by the near-field communication unit (25) in the camera module (2) into electrical energy for supplying power to the lens module (3) and converting the camera module (2 ) reads out the lens data via the near-field communication units (25, 35) and the camera control unit (24) thus functions as a function of the K ameramoduls (2) and / or the lens module (3) controls.
    Fig. 2
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    Camera for industrial image processing
    The present invention relates to a camera for industrial image processing with a camera module and a lens module detachably connected thereto with an optical system with at least one optical lens and a method for operating such a camera for industrial image processing.
    In industrial image processing, for example for machine vision applications, camera systems are generally used in which a camera module with an image sensor and a lens module (also simply called an objective) with a lens arrangement (at least one optical lens) are mechanically separated and detachable from one another . This makes it possible to use a camera module with various interchangeable lenses. The mechanical connection between the camera module and the lens module is usually carried out via standardized lens connections, such as a known S-mount, C-mount or CS-mount connection. The difference between these connections, in addition to different optical performance data, is essentially the size. An S-mount connection uses an M12 thread, while a C- and CS-mount use a 1 '' thread with a pitch of 1/32 ''. Another difference is the back focus, that is the predetermined distance between the image plane of the image sensor and the mounting surface of the lens. DE 10 2012 111 231 A1 and WO 2010/081060 A1 show e.g. a camera for industrial image processing, in which a wide variety of lenses, also with different connection systems, can be connected. Switching between different connection systems is made possible or facilitated, but it is the responsibility of the user to ensure that all changes associated with changing the lens module are taken into account and implemented, which can be quite complex and tedious. Another lens module can make it necessary to change the program settings of a downstream image processing or camera parameters in the camera system even with an identical focal length and aperture, for example due to different optical properties. Another problem associated with this is that a lens module can also be easily mixed up by the user and this can lead to malfunctions of the machine vision system.
    A lens with a fixed focus or with a manually adjustable focus is used in many applications of industrial image processing. In the case of the manually adjustable variant, the lens, or the lens in the lens, is shifted relative to the image sensor in the camera module by means of a special mechanism, for example via a rotatable adjusting ring. Such lenses are also apparent from DE 10 2012 111 231 A1 and WO 2010/081060 A1. Solutions are also known in which the lens is moved out or in / 22 1
    BN-3860 AT screwing the connection thread into the camera module or also by means of a thread separation in the lens relative to the image sensor, which is also equivalent to a focus adjustment. The position of the lens is e.g. fixed with a lock nut or worm screw to fix the focus setting. Lenses with motorized focus adjustment are also known, e.g. from US 6,172,709 B1. However, due to the small size of the lenses, which is particularly desirable for industrial image processing, these solutions are very complex. In addition, these are not suitable for frequent focus adjustment, as would be necessary, for example, for an auto focus in many industrial image processing applications with typically a few thousand images per minute, because of the adjustment speeds required and the short lifetimes. Another problem with the motorized focus adjustment is the necessary electrical power supply, which is usually realized via the camera module and electrical contacts.
    Lenses for industrial image processing are also known, in which liquid lenses are used which enable an automatic focus adjustment, also as an auto focus. The problem with liquid lenses is primarily the necessary electrical power supply for the liquid lenses and the electronics for controlling the liquid lens. The electrical power supply and the control takes place consistently via the camera module via electrical contacts for the power supply and the control between the camera module and the lens module. Examples of this are also known from DE 10 2012 111 231 A1 or WO 2010/081060 A1. The electrical contact with the camera module is subsequently established, for example in the case of a connecting cable which is plugged into the provided sockets after the lens has been connected to the camera module. However, both require corresponding precautions, such as contacts, plugs, sockets, cables, etc., which makes the camera system more complex and prone to errors. Often, even several precautions have to be taken at the same time, because, due to the multitude of connection methods for controlling liquid lenses, there is no standardized connection even with different lens modules from the same manufacturer. However, electrical contacts have the disadvantage, particularly in the area of industrial image processing, of the danger of contamination of accessible contacts in the industrial environment. This remains a problem even if plugs and sockets are used, e.g. described in DE 10 2012 111 231 A1.
    Cameras from the consumer goods sector, such as conventional photo or video cameras, generally have lenses with auto focus adjustment, with the electrical energy also being provided via electrical contacts between the camera module and the lens. These lenses are usually very complex, expensive and usually have a clearly larger / 12 '
    BN-3860 AT space due to other connections. The number of images captured within a typical lifecycle for these cameras is significantly lower than for applications in industrial image processing, which allows mechanical solutions for focus adjustment. The above problems therefore do not occur with such cameras. In this area, however, it is usually the case that each manufacturer has defined its own connection, which are not compatible with each other. Cameras from the consumer goods sector are also unsuitable for industrial image processing because such cameras are not available in an industrial version. This means that they do not meet the requirements for the ambient conditions (temperature, vibrations, tightness requirements, etc.), nor, apart from the standardized tripod thread, suitable options for mechanical mounting on a machine or an industrial-grade interface for communicating with a control unit or to an external periphery. These cameras often do not have an interface for raw image transmission to an external image evaluation unit, nor do they offer the possibility of internal image processing on the camera for industrial image processing applications. In addition, such cameras generally do not offer any possibility of triggering or synchronization in the microsecond range frequently required for industrial applications. For these reasons, such cameras from the consumer goods sector can hardly be used in the field of industrial image processing.
    US Pat. No. 5,630,180 A also describes a camera from the consumer goods sector which has an interchangeable lens. In the interchangeable lens, lens data are stored in a storage unit, which can be read by the camera and which are used in the camera to correct the optical properties of the lens. The connection between the interchangeable lens and camera is in turn made via electrical contacts with all the disadvantages mentioned above.
    Corrections of changes in an optical system over time can also be made without stored lens data, as described, for example, in DE 10 2015 106 844 A1 for an industrial image processing system with an interchangeable lens arrangement. The interchangeable lens arrangement comprises in particular a variable lens and a converging lens arrangement. The optical drift of a vision system that occurs over time is compensated with the variable lens. The electrical connection between the lens arrangement and the camera module takes place via electrical contacts, again with all the disadvantages mentioned above.
    It is an object of the subject invention a camera for industrial image processing, and an associated method for operating a camera for industrial / 22
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    Image processing to indicate that does not have the disadvantages of the prior art mentioned.
    This object is achieved according to the invention in that an image sensor for recording an image and a camera control unit for controlling the camera module and / or the lens module are provided in the camera module and a memory unit with lens data is provided in the lens module, and wireless near-field communication units that cooperate in the camera module and in the lens module are also provided , wherein the near-field communication unit in the lens module converts electromagnetic waves emitted by the near-field communication unit in the camera module into electrical energy for supplying energy to the lens module and the camera module reads out the lens data via the near-field communication units and the camera control unit thus controls a function of the camera module and / or lens module. The object is also achieved with a method in which lens data are stored in the lens module in a storage unit, which are read out by the camera module via cooperating near-field communication unit in the lens module and camera module and are used in a camera control unit in the camera module to take an image with the camera and out the electromagnetic alternating field emitted by the near-field communication unit in the camera module is used to generate electrical energy for supplying energy to the lens module.
    All of the disadvantages associated with electrical contacts on the camera module and lens module can be eliminated by these measures. Since both the power supply and the data communication between the lens module and the camera module are transmitted via near field communication, i.e. wirelessly, no electrical contacts are required between the lens module and the camera module, which can be damaged, for example, when changing the lens and / or due to environmental influences. In addition, the storage unit in the lens module enables lens data to be stored which can be used to control a function of the lens module and / or the camera module.
    However, the lens data can also contain data that make it possible to uniquely identify the lens module, with which a confusion of lens modules can be practically ruled out or recognized and displayed. Furthermore, data from the optical system of the lens module can also be stored as lens data, which make it possible to automatically set camera parameters or program settings in the camera module that are required for taking an image. Last but not least, correction data can also be stored as lens data, which make it possible to compensate for aberrations in the optical system. Operating data that are of interest for servicing can also be stored in the memory unit of the lens module / 22
    BN-3860 AT den. For example, data on the maximum ambient temperature, shock or vibration or the operating time are valuable information that the lens module can either store independently or via the camera module in the storage unit.
    If the camera module also controls a function of the lens module, it is advantageous if the camera module sends control data for controlling the lens module to the lens module via the near-field communication units. This means that no electrical contacts are required for this data transmission.
    It is also particularly advantageous if, from the electromagnetic waves emitted by the near field communication unit in the camera module, electrical energy for supplying energy to a focus variable optical lens, e.g. a liquid lens is obtained in the lens module. The lens module does not require its own power supply, which in particular also simplifies the handling of the lens modules.
    It is also particularly advantageous to use a sensor in the lens module to detect a physical variable in the vicinity of the lens module and to use the physical variable to control a function of the lens module and / or the camera module. It is also advantageous if the physical quantity is used to correct a dependency of the optical properties of the objective module on this physical quantity. With one of these measures, the camera is able to adapt itself automatically to different locations and different environmental conditions, as a result of which the quality of the image recording can be improved.
    To carry out the correction of the dependency, correction data can easily be stored as lens data, which can be read out in a simple manner via the near field communication.
    Cameras for industrial image processing offer little space due to the desired compactness, e.g. because the camera module and the lens module are detachably connected to each other via a standardized CMount, CS-Mount or S-Mount connection. In order to nevertheless be able to accommodate the antennas required for near-field communication, it is advantageous if a lens flange is provided on the lens module, which surrounds the optical system of the lens module and which rests on a contact surface on the camera module, an antenna arrangement of the near-field communication unit of the lens module and on the lens flange an antenna arrangement of the near-field communication unit of the camera module is arranged on the contact surface. It is advantageous if the antenna arrangement on the lens module is arranged in a recess of the lens flange and / or the antenna arrangement on the contact surface is arranged in a recess of the contact surface
    BN-3860 AT net. In this way, compliance with the back-up dimension of the optics can be ensured in a simple manner, and yet a sufficiently large area can be made available for the energy transmission. For versions with lower energy requirements, for example if only data but no actuators and / or no sensors or only a few sensors need to be supplied, a rod antenna can also be sufficient to provide the required energy.
    The present invention is explained in more detail below with reference to FIGS. 1 to 3, which show exemplary, schematic and non-limiting advantageous embodiments of the invention. It shows
    1 shows a camera module and a lens module of an industrial image processing camera according to the invention,
    Fig.2 components of the camera module and lens module and
    3 shows a possible embodiment of the connection between the camera module and the lens module.
    1 shows a camera 1 according to the invention (in an exploded view) for industrial image processing, which comprises a camera module 2 and a lens module 3. The camera module 2 and the lens module 3 are detachably connected via a standardized connection 4, for example a C-mount or S-mount. The connection 4 consists, for example, of an internal thread 5 on the camera module 2 and a corresponding external thread 6 on the lens module 3, which is screwed into the internal thread 5 of the camera module 2. In the lens module 3, or in the housing of the lens module 3, there is an optical lens, for example a lens with a fixed focus or variable focus lens 31, such as e.g. a liquid lens, or a lens system consisting of several lenses (also mixed from lenses with a fixed and variable focus), is provided (see FIG. 2). An image sensor 21 for digitally recording an image is arranged in the camera module 2, or in the housing of the camera module 2. There are no electrical contacts between the camera module 2 and the lens module 3, neither for the electrical energy supply, nor for a control connection.
    A lens control unit 32 for controlling the variable-focus lens 31, such as the liquid lens, is optionally arranged in the lens module 3. The lens control unit 32 is used to adjust the focus-variable lens and thus to adjust the focus of the camera 1. In the case of a lens with a fixed focus, the lens control unit 32 can possibly be omitted or the lens control unit 32 does not have to have this functionality.
    / 22nd
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    There are various known versions of a liquid lens. A known variant uses two iso-tight liquids, e.g. Oil and water, which form a liquid-liquid interface in the lens. The curvature of this liquid-liquid interface can be changed by applying different electrical voltages to the lens, which in turn leads to a change in the focal length of the lens. Another known liquid lens uses a moveable membrane that covers a liquid reservoir to vary the lens focus. The shape of the membrane is changed by means of a coil by applying an electrical current in order to vary the lens focus. The focus of the liquid lens is therefore adjusted by applying an electrical voltage or an electrical current.
    An image processing unit 22 is arranged in the camera module 2, which processes and / or evaluates the digital image data recorded by the image sensor 21. The result of the processing can be output via an interface 23. The interface 23 can be designed, for example, as a connection to a data bus. The image data itself could also be output via the interface 23. Suitable image processing software is therefore implemented in the image processing unit 22. Image preprocessing algorithms can be implemented in the image processing unit 22, by means of which a captured image can be preprocessed or processed. The step of evaluating the image data necessary for a machine vision system, for example in order to control a machine or system, is then carried out in an external unit, for example in a control unit of the machine or system. This evaluation of the image data can, however, also take place directly in the image processing unit 22, for which purpose suitable algorithms or applications are then implemented - in this case one often speaks of a smart camera. A smart camera therefore transmits control data to a machine or system controller in order to control it. A camera control unit 24 is also arranged in the camera module 2, which controls the camera 1 and possibly also a function of the lens module 3, for example by controlling the focus or adjusting the aperture.
    A memory unit 33 is also provided in the lens module 3, in which lens data, in the form of an electronic type plate, of the optical system are stored. This lens data can in particular include data for the unique identification of a lens module 3, data relating to the optical system or the optical lens of the lens module 3 and calibration data of the lens module 3. In the minimum case, a property of the optics or the lens, in particular the focal length and possibly also the aperture, is stored, and in the case of an adjustable aperture the minimum and maximum aperture. Examples of further lens data are a product name (order number, product number), a serial number, a type name, approved manufacturers of the camera modules, /
    BN-3860 AT the adjustment range of the focal lengths for a variable-focus lens, a supported image sensor diagonal, the aberrations of an optical system (such as vignetting, distortion, etc.), correction data for aberrations of the optical system. Certain lens parameters, such as the distortion or the edge drop of the lighting (relative illumination), can also be determined and stored as lens data.
    Electrical energy is required for the operation of the lens module 3, in particular for reading out the lens data from the storage unit 33. Data communication between camera module 2 and lens module 3 is also necessary in order to be able to read out the lens data. According to the invention, both the energy supply and the data communication take place via near field communication (NFC) between camera module 2 and lens module 3. For this purpose, a near field communication unit 25, 35 is arranged both in the camera module 2 and in the lens module 3, each with an assigned antenna arrangement 26, 36 connected is. The near field communication can be both active-passive and active-active (peer-to-peer). The near-field communication unit 35 in the lens module 3 obtains the energy necessary for reading out the storage unit 33 from the electromagnetic alternating field of the near-field communication, which is emitted by the camera module 2.
    The lens data can thus be read out by the camera module 2 via the near-field communication, either directly or via the lens control unit 32. This lens data can then be used in the camera module 2 to ensure that only one lens module 3 suitable for the camera module 2 is used. For example, the type designation, the focal length and / or the image sensor diagonal can be used for this. In this way, errors in the image acquisition can be avoided, which can also result from differences in a lens module 3 of the same type. If these differences are known, for example because these differences are stored in the storage unit 33, these can be taken into account in the image processing in the image processing unit 22, or the image can also be corrected beforehand. This avoids that slight differences lead to sporadic errors in industrial image processing, the origin of which is difficult to assign or to ascertain.
    Correction data for imaging errors of the lens module 3 (ie of the entire optical system of the lens module 3) are therefore preferably also stored as lens data. The imaging errors or the correction data are recorded, for example, during the calibration of the lens module 3 and e.g. stored in the form of a comparison table in the storage unit 33. The camera module 2 can read out the correction data, for example when a new lens module 3 is attached to the camera module 2, and can then correct the captured image data with the correction data, which improves the quality of the image acquisition.
    /
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    Electrical energy is also required for the operation or adjustment of a variable-focus lens 31, such as the liquid lens, or for adjusting an adjustable diaphragm 43 in the objective module 3. By means of the data communication between the camera module 2 and the lens module 3, control commands to the lens control unit 32 for adjusting the focus-variable lens 31 in order to change the focus and / or for adjusting the diaphragm can optionally also be exchanged. Both are done via near field communication (NFC) between camera module 2 and lens module 3.
    Antennas in the camera module 2 and in the lens module 3 are also required for near-field communication. The antenna arrangement 26 of the camera module 2 can be arranged on a camera module contact surface 8 in the area of the connection 4. Likewise, the antenna arrangement 36 of the lens module 3 can be arranged on a lens module contact surface 7 in the region of the connection 4. The camera module contact surface 8 and the lens module contact surface 7 are arranged facing one another, so that antenna arrangements 26, 36 arranged thereon are also arranged facing one another. The two antenna arrangements 26, 36 are of course aligned with one another and arranged as close as possible to one another in order to enable good inductive coupling for near-field communication and energy supply. Surfaces facing each other on camera module 2 and lens module 3 are therefore particularly suitable for attaching antenna arrangements 26, 36. Antenna arrangements 26, 36 preferably do not change the optical system of camera 1; the back focus of the optics are not affected. The antenna arrangements 26, 36 are therefore preferably arranged in recesses on the camera module 2 or lens module 3. An antenna arrangement 26, 36 is preferably applied to a printed circuit board 27, 37 which is inserted in a recess on a surface of the lens module 3 or camera module 2. A circuit board 27, 37 can also be designed as a flexible circuit board, which increases the possibilities of the arrangement. This makes it possible to arrange the antenna arrangements 26, 36 as close as possible to one another with a given and unchanged connection 4 (thread, support dimension). In the exemplary embodiment shown in FIG. 2, the antenna arrangements 26, 36 are arranged on annular printed circuit boards 27, 37 and are each arranged on mutually facing and adjacent end faces on the camera module 2 and lens module 3. The antennas of the antenna arrangements 26, 36 are preferably applied as spiral conductors on the printed circuit boards 27, 37.
    A near-field communication unit 25, 35 with associated antenna arrangement 26, 36 can also be arranged in its own closed housing (a so-called transponder inlay 42 or RFID chip), which can then be inserted into a corresponding recess on the camera module 2 or lens module 3. The antenna arrangement 26, 36, -9 · / 22
    BN-3860 AT of such a transponder inlay 42 is of course reduced to the size of the transponder inlay 42. If a transponder inlay 42 is used in the lens module 3, then, for example, a stub antenna or rod antenna of a corresponding size on the camera module 2 is sufficient compared to the transponder inlay. A transponder inlay 42 often also offers an integrated storage unit 33 which can be used to store lens data. In this case, a separate, additional storage unit in the lens module 3 may also be dispensed with. However, it is also conceivable to use both a memory unit in the transponder inlay and an additional memory unit in the lens module 3 as a memory unit 33 in the lens module 3. Examples of such transponder inlays 42 are a NeoTAG® inlay from Industria Oberländer Ingenieur-GmbH & Co. KG or a RUD-ID-Point® from RUD Ketten Rieger & Dietz GmbH u. Co. KG. Such transponder inlay 42 primarily offer the advantage of the very compact size, which makes them particularly suitable for use in a lens module 3.
    A camera 1 for industrial image processing is preferably robust, which is why the housing of the camera module 2 and / or lens module 3 is often made of metal. In order to reduce a negative influence on the near field communication by metallic surfaces, a shield, for example in the form of a ferrite foil or a ferrite shell 44, can also be provided between an antenna arrangement 26, 36 and the housing of the camera module 2 or lens module 3.
    Other surfaces facing one another on the camera module 2 and lens module 3 are also suitable for attaching the antenna arrangements 26, 36. For example, the antenna arrangements 26, 36 could also be provided in the area of the threads 5, 6 of the connection 4.
    The camera control unit 24 of the camera module 2 and the lens control unit 32 of the lens module 3 are therefore able to communicate with one another and to exchange data via the near-field communication units 25, 35 and the associated antenna arrangements 26, 36. In particular, this also makes it possible to control the one variable-focus lens of the lens module 3 via the camera module 2 or to adjust an adjustable diaphragm 43 of the lens module 3. An autofocus function can thus even be implemented via the camera control unit 24 and the evaluation of the image data in the image processing unit 22.
    The electrical energy for operating the lens module 3, in addition to reading out the memory unit 33, can also be obtained from near-field communication. The energy of the electromagnetic alternating field emitted by the near-field communication unit 25 of the camera module 2 via the antenna arrangement 26 can be in the near / 22
    BN-3860 AT field communication unit 35 of the lens module 3 can also be converted into electrical energy (energy harvesting function of the near field communication) and used to operate the lens module 3. Since the lens module 3 requires very little electrical energy for operation, the electrical energy obtained from the near field communication is sufficient for this. Thus, the lens module 3 does not require an electrical connection for an additional electrical energy supply. Of course, a transponder inlay 42 can also be used for energy harvesting with a correspondingly small distance between the assigned antenna arrangements 26, 36.
    At least one sensor 38 can also be provided on the lens module 3, which detects a physical variable in the vicinity of the lens module 3, such as a temperature, etc.
    The sensor 38 can also be read out by the camera module 2 via the near-field communication unit 35 and the camera module 2 can use the sensor values supplied to control the camera 1. The sensor 38 can be read out directly via the near-field communication unit 35 or indirectly via the lens control unit 32 (as in FIG. 2). For example, a lighting unit of a machine vision system for industrial image processing could be controlled via the detected ambient temperature. For this purpose, it can also be provided that a sensor value is output via the interface 23.
    A focus-adjustable lens 31, such as a liquid lens, can be dependent on the temperature in terms of its optical properties, the temperature dependency being generally known, e.g. by measuring or by a manufacturer's specification. Temperature-dependent corrections could thus be made, e.g. compensation for a possible temperature-dependent change in the optical properties of a focus-variable lens 31. For this purpose, the temperature is preferably measured in the vicinity of the lens, for example by a sensor 38, which can be arranged in the lens module 3 in the vicinity of the lens 31. The temperature dependency could also be stored in the memory unit 33 as lens data, for example as a suitable map. A temperature-dependent correction could be implemented in the lens module 3, for example in the lens control unit 32. If the correction is carried out directly in the lens module 3, there is of course no need to read out the relevant lens data from the camera module 2. Such a temperature-dependent correction could also be implemented in the camera module 2, for example in the camera control unit 24, with which the optical system is controlled. Furthermore, it is also conceivable to postpone the temperature-dependent correction in the camera module 2 via the image processing in the image processing in / 22
    BN-3860 AT unit 22, provided that these temperature-dependent errors are errors that can be corrected using software.
    A position sensor 39 can also be provided in the lens module 3, e.g. the solid angle to the normal of the gravitational force can be provided. In this way, for example, the position of the camera module 2 or the lens module 3 in the room can be determined, set (also automated) and monitored. The position sensor 39 can also be designed as a gyro sensor or can include a gyro sensor in order to be able to detect an angular acceleration as well as a linear acceleration. The position sensor 39 can thus always correctly determine the position in the room even with a moving camera 1, for example when mounting on a robot arm. At the same time, position or acceleration-dependent corrections could also be made. The properties of a focus variable lens 31, e.g. a liquid lens, for example, can also be dependent on the installation position or an external acceleration supplied (e.g. recorded as a double time derivative of the position or also by means of an acceleration sensor), since the acceleration can cause a so-called coma error. This dependency is usually known, e.g. by measuring or by a manufacturer's specification, and can therefore be stored, read out and taken into account as lens data. Analogously to the temperature-dependent corrections, position-dependent or acceleration-dependent corrections can also be carried out in the lens module 3 or in the camera module 2 by controlling the optical system or by software in the image processing unit 22.
    The position sensor 39 can likewise be read out by the camera module 2 via the near field communication unit 35 and the camera module 2 can use the sensor values supplied to control the camera 1 or output them via the interface 23. The position sensor 39 can be read out directly via the near-field communication unit 35 (as in FIG. 2) or indirectly via the lens control unit 32.
    In addition to temperature and position, or acceleration, other physical variables in the environment of the lens module can of course also be recorded, such as the relative humidity in the environment, since the optical system or a part thereof can also change depending on it. Such a physical variable could then in turn be used to control a function of the lens module 3 and / or the camera module 2 or to correct a dependency of the optical properties of the lens module 3 on this physical variable.
    Likewise, a distance sensor 45 can be provided in the lens module 3, which measures the distance of the lens module 3 to a reference plane. Together with the position sensor 39, the relative position of the objective module 3 in space in relation to a reference plane / 22
    BN-3860 AT can be checked (e.g. in camera module 2 or in an associated machine or system controller), which can be used, for example, to set up a machine vision system. The distance sensor 45 can also be used to control the image acquisition and / or lighting of the industrial image processing.
    The distance sensor 45 can also be read out by the camera module 2 via the near-field communication unit 35 and the camera module 2 can use the sensor values supplied to control the camera 1. The distance sensor 45 can be read out directly via the near-field communication unit 35 or indirectly via the lens control unit 32 (as in FIG. 2).
    The sensor 38 and / or the position sensor 39 and / or the distance sensor 45 could also or additionally be installed in the camera module 2, the sensor values then being e.g. can be read directly from the camera control unit 24 or the image processing unit 22. Likewise, the sensor 38 and / or the position sensor 39 and / or the distance sensor 45 could also or additionally be installed at another suitable location, but clearly assigned to the objective module 3, for example at a lighting unit permanently installed on the camera 1. Reading out sensors installed in this way could e.g. again by means of near-field communication or via fixed wiring.
    In the case of very small lens modules 3, for example in the case of an S-mount, the available size may not be sufficient to arrange the elements required for near-field communication directly on the lens module 3. In this case in particular, a transponder inlay can be used on the lens module 3. An extension ring 40 can also be provided, as shown in FIG. 3, which is screwed onto the thread 6 of the connection 4 of the objective module 3. The antenna arrangement 36 and the associated near-field communication unit 35 of the lens module 3 can be arranged on the extension ring 40, e.g. designed as a transponder inlay 42, as in FIG. 3. Likewise, antenna arrangements 26, 36, which are arranged on annular printed circuit boards 27, 37 and are each arranged on mutually facing and adjacent end faces on the camera module 2 and lens module 3, can be provided, as shown in FIG. Can, for example through the large-area connection of the annular arrangement, sufficient electrical energy, e.g. For the actuation of actuators, the connection to the lens control unit 32 and subsequently to the focus variable lens 31 and to a sensor 38, or also to, can be made via a suitable, cooperating electrical connection 41 on the lens module 3 and on the extension ring 40 a position sensor 39 or distance sensor 45 can already be implemented in the manufacture of the objective module 3. The electrical connection 41 could also be designed as a permanent connection. The extension ring 40 and the lens module 3 can then jointly in / 22nd
    BN-3860 AT the camera module 2 can be screwed. No electrical contacts in the form of plug connections are then still required between camera module 2 and lens module 3 (with extension ring 40).
    However, operating data that are of interest for a service case can also be stored in the memory unit 33 of the lens module 3, or the extension ring 40. For example, data on the maximum ambient temperature, shock or vibration or the operating time, which can be obtained, for example, from the sensors installed in the lens module 3, are valuable information. Such operating data can either be stored or read out automatically by the lens module 3, for example via the lens control unit 32, or 10 via the camera module 2 and the near-field communication unit 35, in the memory unit of the lens module 3 and can be output, for example, by the camera module 2 on a display or via the interface 23 can be read.
    , -1415 / 22
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    权利要求:
    Claims (30)
    [1]
    Claims
    1. Camera for industrial image processing with a camera module (2) and a detachably connected lens module (3) with an optical system with at least one optical lens, characterized in that in the camera module (2) an image sensor (21) for recording an image and a camera control unit (24) for controlling the camera module (2) and / or the lens module (3) are provided, and a memory unit (33) with lens data is provided in the lens module (3) that in the camera module (2) and in the lens module (3 ) interacting wireless near-field communication units (25, 35) are provided, the near-field communication unit (35) converting an electromagnetic alternating field emitted in the lens module (3) by the near-field communication unit (25) in the camera module (2) into electrical energy for supplying power to the lens module (3) and that the camera module (2) reads out the lens data via the near-field communication units (25, 35) and the camera controls unit (24) controls a function of the camera module (2) and / or the lens module (3).
    [2]
    2. Camera according to claim 1, characterized in that the camera module (2) sends control data for controlling the lens module (3) via the near field communication units (25, 35) to the lens module (3).
    [3]
    3. Camera according to claim 1 or 2, characterized in that a variable-focus optical lens (31) is provided in the lens module (3), the near-field communication unit (35) in the lens module emitting from the near-field communication unit (35) in the camera module (2) Alternating field converted into electrical energy for energy supply of the adjustment of the focus variable optical lens
    [4]
    4. Camera according to claim 3, characterized in that the adjustable optical lens (31) is a liquid lens.
    [5]
    5. Camera according to claim 1 or 2, characterized in that an adjustable diaphragm (43) is provided in the lens module (3), the near-field communication unit (35) in the lens module (3) that of the near-field communication unit (25) in the camera module (2) emitted alternating electromagnetic field into electrical energy for energy supply of the adjustment of the adjustable diaphragm (43).
    [6]
    6. Camera according to one of claims 1 to 5, characterized in that a lens control unit (32) is provided in the lens module (3), which communicates with the near field
    -1516 / 22
    BN-3860 AT on unit (35) is connected in the lens module (3), the lens control unit (32) receiving control commands from the camera module (2) via near field communication.
    [7]
    7. Camera according to one of claims 1 to 4, characterized in that on the lens module (3) a lens module contact surface (7) is provided which faces a camera module contact surface (8) on the camera module (2), one on the lens module contact surface (7) Antenna arrangement (36) of the near field communication unit (35) of the lens module (3) and an antenna arrangement (26) of the near field communication unit (25) of the camera module (2) are arranged on the camera module contact surface (8).
    [8]
    8. Camera according to claim 7, characterized in that the antenna arrangement (36) on the lens module (3) is arranged in a recess of the lens module contact surface (7) and / or the antenna arrangement (26) on the camera module (2) in a recess of the camera module contact surface ( 8) is arranged.
    [9]
    9. Camera according to one of claims 1 to 8, characterized in that the camera module (2) and the lens module (3) are releasably connected to one another via a standardized C-mount, CS-mount or SMount connection.
    [10]
    10. Camera according to one of claims 1 to 9, characterized in that in the lens module (3) and / or in the camera module (2) at least one sensor for detecting a physical variable in the environment of the camera (1) is arranged.
    [11]
    11. The camera according to claim 10, characterized in that the near-field communication unit (35) in the lens module (3) converts the electromagnetic alternating field emitted by the near-field communication unit (25) in the camera module (2) into electrical energy for operating and reading out the sensor.
    [12]
    12. Camera according to claim 10 or 11, characterized in that a temperature sensor (38) is arranged as a sensor.
    [13]
    13. Camera according to claim 12, characterized in that correction data for correcting a temperature dependence of the optical system of the lens module (3) are stored in the lens data.
    [14]
    14. Camera according to claim 13, characterized in that the correction of the temperature dependency is implemented in the lens module (3) or in the camera module (2).
    [15]
    15. Camera according to claim 10 or 11, characterized in that a position sensor (39) and / or a distance sensor (45) is arranged as a sensor.
    17/22
    BN-3860 AT
    [16]
    16. The camera according to claim 15, characterized in that correction data for correcting a position dependency and / or acceleration dependency and / or distance dependency of the optical system of the objective module (3) are stored in the lens data.
    [17]
    17. Camera according to claim 16, characterized in that the correction of the position dependency and / or acceleration dependency and / or distance dependency is implemented in the lens module (3) or in the camera module (2).
    [18]
    18. Camera according to one of claims 1 to 17, characterized in that data for unique identification of the lens module (3) are stored in the lens data.
    [19]
    19. Camera according to one of claims 1 to 17, characterized in that data on the optical system of the lens module (3) are stored in the lens data.
    [20]
    20. Camera according to one of claims 1 to 17, characterized in that calibration data of the lens module (3) are stored in the lens data.
    [21]
    21. A method for operating a camera (1) for industrial image processing, the camera (1) having a camera module (2) and a lens module (3) detachably connected thereto with an optical system with at least one optical lens, characterized in that In the lens module (3), lens data are stored in a storage unit (33), which are read out by the camera module (2) via cooperating near-field communication units (25, 35) in the lens module (3) and camera module (2) and in a camera control unit (24) in the camera module (2) are used to record an image with the camera (1) and that electrical energy for supplying energy to the lens module (3) is obtained from the electromagnetic alternating field emitted by the near-field communication unit (25) in the camera module (2).
    [22]
    22. The method according to claim 21, characterized in that the camera module (2) sends control data for controlling the lens module (3) via the near-field communication units (25, 35) to the lens module (3).
    [23]
    23. The method according to claim 21 or 22, characterized in that from the electromagnetic alternating field emitted by the near field communication unit (25) in the camera module, electrical energy for supplying energy to a focus-variable optical lens (31) and / or an adjustable diaphragm (43) in the objective module (3) is won.
    , -17
    18/22
    BN-3860 AT
    [24]
    24. The method according to any one of claims 21 to 23, characterized in that a sensor (38) in the lens module (3) detects a physical variable in the vicinity of the lens module (3) and the physical variable for controlling a function of the lens module (3 ) and / or the camera module (2) is used.
    [25]
    25. The method according to any one of claims 21 to 23, characterized in that with a sensor (38) in the lens module (3), a physical variable in the environment of the lens module (3) is detected and the physical variable for correcting a dependency of the optical properties of the Lens module (3) of this physical size is used.
    [26]
    26. The method according to claim 25, characterized in that correction data for performing the correction of the dependency are stored in the lens data.
    [27]
    27. The method as claimed in claim 24 or 25, characterized in that electrical energy for supplying energy to the sensor (38) is obtained from the electromagnetic alternating field emitted by the near-field communication unit (25) in the camera module (2).
    [28]
    28. The method according to any one of claims 21 to 27, characterized in that data for unique identification of the lens module (3) are stored in the lens data.
    [29]
    29. The method according to any one of claims 21 to 28, characterized in that data on the optical system of the lens module (3) are stored in the lens data.
    [30]
    30. The method according to any one of claims 21 to 29, characterized in that calibration data of the lens module (3) are stored in the lens data.
    19/22
    Bernecker + Rainer
    Industrie-Electronics Ges.m.b.H
    1/2
    Fig. 1
    20/22
    Bernecker + Rainer
    Industrie-Electronics Ges.m.b.H
    2/2
    21/22
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    同族专利:
    公开号 | 公开日
    EP3296813A1|2018-03-21|
    US20180084168A1|2018-03-22|
    AT519192B1|2019-03-15|
    EP3296813B1|2020-05-13|
    US11223753B2|2022-01-11|
    CA2979464A1|2018-03-19|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    KR20130061395A|2011-12-01|2013-06-11|엘지전자 주식회사|Mobile terminal and method for controlling thereof|
    US9083885B1|2013-11-18|2015-07-14|Google Inc.|Fixed focus camera module with near-field image recognition|
    US5194956A|1989-10-24|1993-03-16|Sony Corporation|Lens and aperture control apparatus|
    JP3189157B2|1992-09-25|2001-07-16|株式会社ニコン|Camera system with interchangeable lenses|
    JPH1164713A|1997-08-26|1999-03-05|Yamano Kogaku:Kk|Attachable/detachable lens block and video camera system using the same|
    DE10064393A1|2000-12-21|2002-07-11|Axel Schmidt|transponder|
    JP2007116474A|2005-10-20|2007-05-10|Fujifilm Corp|Camera system|
    JP2007129433A|2005-11-02|2007-05-24|Fujifilm Corp|Digital camera|
    JP2007306433A|2006-05-12|2007-11-22|Fujifilm Corp|Lens interchange type camera|
    JP5159361B2|2007-03-30|2013-03-06|キヤノン株式会社|interchangeable lens|
    JP2008275890A|2007-04-27|2008-11-13|Olympus Imaging Corp|Digital camera with interchangeable lens|
    US8134116B2|2009-01-12|2012-03-13|Cognex Corporation|Modular focus system for image based code readers|
    JP5623254B2|2010-11-29|2014-11-12|キヤノン株式会社|Imaging apparatus and control method thereof|
    US8619374B2|2011-07-05|2013-12-31|Panasonic Corporation|Lens control apparatus and interchangeable lens including lens control apparatus|
    EP2778733A4|2011-11-11|2015-11-11|Nikon Corp|Focal point adjustment device, image capture device, and lens barrel|
    US8947590B2|2011-11-22|2015-02-03|Cognex Corporation|Vision system camera with mount for multiple lens types|
    US8712394B2|2011-12-14|2014-04-29|Blackberry Limited|Systems, methods, and apparatus to prepare a mobile device for provisioning|
    CN105075240B|2013-03-27|2018-07-17|富士胶片株式会社|Changeable-lens digital camera|
    US20150124336A1|2013-06-25|2015-05-07|Public Service Solutions, Inc.|Wide spectrum optical systems and devices implementing first surface mirrors|
    DE102013012987A1|2013-08-03|2015-02-05|Carl Zeiss Microscopy Gmbh|Method for calibrating a digital optical device and optical device|
    CN103413165B|2013-08-07|2017-08-25|歌尔股份有限公司|Control the method and controlled NFC label of NFC label|
    US9420188B2|2013-09-17|2016-08-16|Sony Corporation|Lens control apparatus, lens control method, image capturing apparatus, information processing apparatus, information processing method, image capturing system, and computer readable storage medium|
    CN105659159B|2013-11-08|2019-04-16|富士胶片株式会社|Camera system, camera body and communication means|
    US10830927B2|2014-05-06|2020-11-10|Cognex Corporation|System and method for reduction of drift in a vision system variable lens|
    US10565219B2|2014-05-30|2020-02-18|Apple Inc.|Techniques for automatically generating a suggested contact based on a received message|
    KR20160129336A|2015-04-30|2016-11-09|엘지전자 주식회사|Mobile terminal|
    US10494739B2|2015-07-29|2019-12-03|Apple Inc.|Laser polishing ceramic material|
    US10225026B2|2016-06-27|2019-03-05|General Electric Company|System for piston rod monitoring|PL433038A1|2020-02-25|2021-08-30|Gl Optic Polska Spółka Z Ograniczoną Odpowiedzialnością Spółka Komandytowa|Identification system for optical accessories of the luminance meter|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50838/2016A|AT519192B1|2016-09-19|2016-09-19|Camera for industrial image processing|ATA50838/2016A| AT519192B1|2016-09-19|2016-09-19|Camera for industrial image processing|
    CA2979464A| CA2979464A1|2016-09-19|2017-09-18|Camera for industrial image processing|
    EP17191613.3A| EP3296813B1|2016-09-19|2017-09-18|Camera for industrial image processing|
    US15/707,517| US11223753B2|2016-09-19|2017-09-18|Camera for industrial image processing|
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