• 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:

    公开号:SU957774A3
    申请号:SU802906398
    申请日:1980-03-27
    公开日:1982-09-07
    发明作者:Эвен Жан
    申请人:Сосьете Ложилифт Сарль (Фирма)；
    IPC主号:
    专利说明:

    The invention relates to automation and can be used to detect the presence at some distance from a controlled object of a physical body, for example, the presence of an outsider near the entrance to a building or the presence of an obstacle in the way of moving objects, such as an elevator door, a press part, etc.
    A device is known comprising a generator and an antenna divided into sections, each of which is connected to a circuit for measuring the signal amplitude Γϊΐ.
    ’-J 15
    The closest technical solution to the proposed one is a device containing a signal generator, one output of which is connected to a bus of zero potential, and the other to sections of the antenna that are installed on the monitored object and connected to bridge signal measurement circuits [2]. 25
    The disadvantage of these devices is the low reliability of detecting the presence of an extraneous body near the controlled object under conditions of an increased level of interference, as well as the complexity of these devices;
    The purpose of the invention is to increase the reliability of detection and simplification of the device.
    This goal is achieved by the fact that a comparison unit is introduced into the device by the number of sections of the cell for selecting the maximum signal amplitude, each of which is made in the form of a diode, and the cell for determining the arithmetic mean of the signal amplitudes, each of which is made in the form of a diode and resistor, anodes the diodes of the cells for selecting the maximum amplitude of the signal are connected to the corresponding sections of the receiving antenna, and the cathodes are connected to the first input of the comparison unit, the cathodes of the diodes of the cells to determine the arithmetic mean The amplitudes of the signals are connected to the corresponding sections of the receiving antenna, and the anodes are connected through the corresponding resistors to the second input of the comparison unit.
    In FIG. 1 shows a diagram of the installation of the device on a controlled object, for example, on elevator doors;
    in FIG. 2 is a schematic diagram of a device.
    The device contains a generator 1 of liquid frequency signals, for example, 8 kHz with a constant amplitude, one terminal 2 of which is connected to a zero zero potential (with ground), and the other terminal 3 is connected to radiating antennas 4, which are installed on insulating spacers 5 on metal the doors of the elevator doors 6, which 10 are also connected to the bus of zero potential.
    In the immediate vicinity of the antennas 4 at the edges of the doors, the elevator 15, receiving antennas 7 are installed, which are divided into several independent sections, for example, six. Each section of the antenna 7 connected to the selection unit 8 am- maximum 2Q plitudy signal, which is configured as a diode 9 and a cell 10 determining the arithmetic mean value of signal amplitudes, which is designed as a series-connected diode 11 and resistor 12. You are a water E all diodes 9 are combined and connected to the first input of the comparison unit 13, and the conclusions of all resistors 12 are combined and connected to the second input of the comparison unit 13.
    The device operates as follows.
    The field of electromagnetic radiation is concentrated mainly between the antenna 4 and the door.6, located at 35 zero ground potential, and therefore a small part gets to the receiving antenna 7. (radiated energy. Moreover, electromagnetic waves radiated or reflected constantly fixed by 40 objects affect to different sections of the receiving antenna 7 in ratios that remain constant.
    The signals from each section of the antenna 7 are fed to the inputs of the cells 8 for selecting the maximum signal amplitude and cells 10 for determining the arithmetic mean of the signal amplitudes. Positive signals appear at the output of diodes 9, the largest of which covers all other diodes 9 and the maximum amplitude of signals from all sections of antenna 7 is fed to the first input of comparison unit 13. Negative signals appear at the output of diodes 11, and signals from the outputs of all cells 10 are summed at the second input of the comparison unit 13. & 0 The second input of block 13 is regulated so that the magnitude of the signal on it is equal to the arithmetic average of the amplitudes of the signals from all sections of the antenna 7. 65
    The device is preliminarily regulated so that in the absence of a foreign body near the object, the output signal from block 13 is equal to zero. An approaching person or an object is more or less connected with the earth; therefore, its appearance causes a change in the structure of the electromagnetic field near the controlled object, i.e. the appearance of additional waves reflected from it, which fall on the antenna sections. 7. Since the approaching foreign body is at different distances from the sections of the antennas, changes in the signals at different sections of the antenna различными turn out to be different, and the more, the closer the foreign body is.
    As a result, when an external body approaches the controlled object, the value of the maximum signal amplitude and the arithmetic mean value of the signals from all sections of the antenna turn out to be different, and the corresponding signal appears at the output of the comparison unit 13.
    权利要求:
    Claims (2)
    [1]
    in fig. 2 - schematic diagram of the device. The device contains a generator of 1 liquid frequency signals, for example, 8 kHz with a constant amplitude, one pin 2 of which is connected to a wider left potential (ground), and the other pin 3 is connected to radiating antennas 4, which are mounted on insulating pads 5 on a metal 6 doors of the elevator, which are also connected to the zero potential bus. In the immediate vicinity of the antennas 4, receiving antennas 7 are mounted on the edges of the doors. The lifts are divided into several independent sections, for example, six. Each section of the antenna 7 is connected to a cell 8 for selecting the maximum amplitude of the signal, which is made in the form of diode 9, and to cell 10 for determining the arithmetic average of the amplitudes of the signals, which is fulfilled in the form of series-connected diode 11 and a resistor 12. In the water of all the diodes 9 are connected and connected to the first input of block 13, and the terminals of all resistors 12 are connected and connected to the second input of block 13. The device works as follows. The field of electromagnetic radiation is concentrated mainly between antenna 4 and the door. B, located on zero ground potential, and a small part of the receiving antenna 7 (radiated energy. Moreover, electromagnetic waves emitted or reflected by permanently fixed objects are affected) to different sections of the receiving antenna 7. in ratios that remain constant. Signals from each section of the antenna arrive at the inputs of cells 8 for selecting the maximum signal amplitude and cells 10 for determining the arithmetic average The amplitudes of the signals. At the output of the diodes 9, positive signals appear, the largest of them closing all other diodes 9 and the first input of the comparison unit 13 is fed with the maximum amplitude of signals from all sections of the antenna 7. At the output, diodes 11 appear negative signals, and due to resistors 12, the signals from the outputs of all the cells 10 are summed at the second input of the comparison unit 13. The second input of the block 13 is adjusted so that the magnitude of the signal on it is equal to the arithmetic mean value of the amplitudes of the signals from all sections 7. The antenna device previously adjusted so that in the absence of a foreign body close to the object hydrochloric output signal from unit 13 is zero. An approaching person or some object is to some extent connected with the ground, therefore its appearance causes a change in the structure of the electromagnetic field near the object to be controlled, i.e. the appearance of additional waves reflected from it that fall into the antenna section. 7. As the approaching side body appears at different distances from the antenna sections, the changes in the signals in the various sections of the antenna 7 are different, and the larger the closer the foreign body is. As a result, when a foreign body approaches a monitored object, the maximum signal amplitude value and the arithmetic mean value of the signals from all antenna sections are different, and a corresponding signal appears at the output of the comparison unit 13. DETAILED DESCRIPTION A detector for detecting the presence of a foreign body near an object, comprising a constant amplitude signal generator, one terminal of which is connected to a zero potential bus, and the other is connected to a radiating antenna, which has a receiving antenna located on the monitored object and divided on the section, which differs from the fact that, in order to increase the reliability of detection and simplification of the device, a comparison unit is inserted into it and, according to the number of antenna sections, the selection cell is maximized Noise amplitude of the signal, each of which is made in the form of a diode, And a cell for determining the arithmetic average value of the amplitudes of the signals, each of which is made in the form of a diode and a resistor, the anodes of the diodes of the maximum amplitude of the signal are connected to corresponding sections of the receiving antenna, and the cathodes are connected to the first input of the comparator unit, the cathodes of the diodes of the cells determining the arithmetic average value of the amplitudes of the signals are connected to the corresponding sections of the receiving antenna, and the anodes through s resistors are connected to the second input of the comparing unit. Sources of information taken into account in the examination 1. US patent 3017957, cl. 187-48, pub. 1958.
    [2]
    2. US Patent 3018851, cl. 187-48, pub. 1957 (prototype).
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    同族专利:
    公开号 | 公开日
    FR2452720B1|1984-01-27|
    EP0017547B1|1984-07-04|
    DE3068405D1|1984-08-09|
    BR8001820A|1980-11-18|
    US4326197A|1982-04-20|
    FI70092B|1986-01-31|
    FI800932A|1980-09-29|
    FR2452720A1|1980-10-24|
    FI70092C|1986-09-12|
    EP0017547A1|1980-10-15|
    AT8302T|1984-07-15|
    ES489970A1|1980-10-01|
    CA1148635A|1983-06-21|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2720284A|1952-11-13|1955-10-11|Otis Elevator Co|Elevator door control mechanism|
    US3018851A|1957-11-19|1962-01-30|Otis Elevator Co|Control mechanism for doors|
    FR1436069A|1965-03-12|1966-04-22|Saxby|Proximity sensor|
    US3439358A|1965-11-30|1969-04-15|George Washington Ltd|Activity detectors|
    US3497995A|1968-04-19|1970-03-03|Stanley Works|Height sensitive proximity door operator system|
    US3496381A|1968-05-10|1970-02-17|Stanley Works|Proximity control guard plate|
    US3614724A|1970-04-08|1971-10-19|Atomic Energy Commission|Detection system|
    US3794992A|1972-02-07|1974-02-26|Gen Dynamics Corp|Radio frequency intrusion detection system|
    FR2173804B1|1972-03-03|1975-03-21|Salmet Gaston|
    US3846790A|1973-06-08|1974-11-05|Honeywell Inc|Intrusion detection systems|
    US3953770A|1974-07-11|1976-04-27|Jinnosuke Hayashi|Safety equipment for machinery used in processing plates, etc.|
    US3967261A|1974-10-10|1976-06-29|Fudaley Solly L|Proximity sensor with simultaneously active intermixed sensor types|
    US3973208A|1975-02-14|1976-08-03|Dovey Manufacturing Company|Capacitor detector device|
    GB1529862A|1976-01-19|1978-10-25|Thorn Domestic Appliances Ltd|Proximity switch|
    JPS5741169B2|1976-11-18|1982-09-01|
    JPS606280B2|1977-03-24|1985-02-16|Mitsubishi Electric Corp|DE3114792C2|1981-04-11|1983-02-03|Karl 7298 Loßburg Hehl|Switch device with several contactless proximity switches for individual functions|
    FI71206C|1983-12-14|1986-11-24|Kone Oy|CONTRACTING AUTHORITY FOR CONTRACTING AUTHORITY|
    FI70651C|1984-10-05|1986-09-24|Kone Oy|OVERHEAD FREQUENCY FOR OIL FITTINGS|
    GB8426010D0|1984-10-15|1984-11-21|Memco Med Ltd|Automatic control|
    DE3632624C1|1986-09-25|1988-03-10|Balluff Gebhard Feinmech|Proximity switch insensitive to interference fields|
    US6050369A|1994-10-07|2000-04-18|Toc Holding Company Of New York, Inc.|Elevator shaftway intrusion device using optical imaging processing|
    US5644111A|1995-05-08|1997-07-01|New York City Housing Authority|Elevator hatch door monitoring system|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR7908410A|FR2452720B1|1979-03-28|1979-03-28|
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