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    • 专利摘要:
    Computer (4) comprising a first computer spindle (4_1), a second computer spindle (4_2), a third computer spindle (4_3), characterized in that it comprises an adaptation module (50) suitable for d firstly determine a type of electronic device coupled to said first computer pin (4_1), second computer pin (4_2), third computer pin (4_3), and secondly adapt an internal impedance on at least one of the three pins (4_1, 4_2, 4_3). Figure 3
    公开号:FR3090925A1
    申请号:FR1873349
    申请日:2018-12-19
    公开日:2020-06-26
    发明作者:Jacques Rocher；Yannick Leroy
    申请人:Continental Automotive France SAS；
    IPC主号:
    专利说明:

    Description
    Title of the invention: Automatic coupling detection device between electronic devices
    The present invention relates generally to the coupling of electronic devices. The invention finds applications, in particular, in the automotive field. It can be implemented, for example in an electronic computer.
    [0002] A motor vehicle nowadays includes more and more on-board electronics such as, for example, sensors coupled to electronic computers. This on-board electronics requires a more or less complex connection in the motor vehicle.
    In the case of an internal combustion engine, sensors are used and coupled to at least one electronic computer such as an engine control computer to ensure the proper functioning of said internal combustion engine and thus allow better control of consumption. in fuel and therefore control of the emission of pollutants into the atmosphere.
    To produce these sensors, it is known in the prior art to use a voltage source type sensor positioned facing a movable notched target. Said sensor generally has three sensor pins for transferring a detection signal in the form of a voltage variation to the engine control computer.
    In recent years, a new sensor technology has been developed, these are current source type sensors. These sensors deliver information in the form of a current variation.
    Depending on the type of sensor used, there is a dedicated and different hardware interface at the engine control computer allowing the coupling of said sensor to said engine control computer. This interface allows, among other things, with suitable electronics (in the electronic computer) to generate and receive adequate electrical signals to manage the internal combustion engine in this case.
    [0007] Thus, it is necessary, when designing the engine control computer, to modify its hardware interface as a function of the type of sensor connected, that is to say a voltage source type sensor or a current source type. Consequently, once the choice of the sensor has been made, it is no longer possible to change the type of sensor, for example during the life of the vehicle, because the hardware interface is not adaptive.
    The invention provides a computer comprising a first computer spindle, a second computer spindle, a third computer spindle, characterized in that it comprises an adaptation module suitable for, on the one hand, determining a type of electronic device coupled to said first computer spindle, second computer spindle, third computer spindle, and on the other hand to adapt an internal impedance on at least one of the three.
    For example, the internal impedance can take two impedance values.
    It is also for example proposed that the internal impedance is achieved by at least two resistors coupled in series.
    Advantageously, according to the invention, the computer comprises for example a processing module adapted to process a signal from the adaptation module.
    In a second aspect of the invention, there is provided a set of a computer and an electrical device in which the electronic device is a sensor.
    For example, the sensor can be a voltage source type sensor or a current source type sensor.
    To improve performance, it is for example proposed that an adaptation module determines the type of sensor coupled to the computer and adapts the impedance on at least one of the three pins of the computer depending on the type of sensor. .
    In addition, it is for example proposed that the adaptation module is suitable for determining the type of sensor coupled to the computer by measuring a voltage across the terminals of the sensor.
    A preferred embodiment of the invention will now be described with reference to the accompanying drawings in which:
    Figure 1 shows a schematic view of a computer of the prior art coupled to a voltage source type sensor.
    FIG. 2 represents a schematic view of a computer of the prior art coupled to a current source type sensor.
    FIG. 3 represents a schematic view of a computer comprising a hardware interface according to the invention.
    FIG. 1 illustrates a sensor 2 of the voltage source type of the prior art coupled for example to a motor control computer 4. The voltage source type sensor 2 is for example a sensor dedicated to detecting the positioning of a camshaft of an internal combustion engine through the passage of teeth of said target in front of said voltage source type sensor 2 . Such a voltage source type sensor 2 generally comprises three pins with a first sensor pin 2_1 coupled, for example to a first computer pin 4_1 and suitable for supplying said voltage source type sensor 2 with electrical energy; a second sensor pin 2_2 coupled to a second computer pin 4_2 dedicated to receiving a signal representative of the position of the camshaft; and finally a third sensor pin 2_3 coupled to a third calculator pin 4_3 which is generally coupled to an electrical ground of the motor vehicle. The internal structure of the voltage source type sensor 2 is well known to those skilled in the art and will not be presented in detail here.
    The engine control computer 4 has a hardware interface 6 comprising for example a sensor supply module 8 and a signal processing module 10.
    The sensor supply module 8 is suitable for supplying electrical energy to the sensor 2 of the voltage source type. To do this, it has a first pin 8_1 of the sensor supply module suitable for generating said supply of electrical energy to said sensor 2 of the voltage source type through the first computer pin 4_1. For example, the power supply has a value of 5V. The internal structure of the sensor supply module 8 is well known to those skilled in the art and many variants are available to it.
    In an exemplary embodiment, the sensor supply module 8 includes an electrical power supply which can be an internal supply of the engine control computer 4 and a resistor 12 called "pull-up". Said pull-up resistor 12 has the role of biasing the voltage source type sensor 2. The pull-up resistor 12 has a first resistor pin 12_1 coupled on the one hand to the power supply and on the other hand to the first pin 8_1 of the sensor supply module. It further comprises a second pin 12_2 of resistance coupled to a second pin 8_2 of the power supply module.
    The signal processing module 10 is suitable for shaping and / or filtering a signal from the sensor 2 of the voltage source type. To do this, the signal processing module 10 comprises a first pin 10_l of signal processing module, a second pin 10_2 of signal processing module and a third pin 10_3 of signal processing module.
    For example, the first pin 10_l of signal processing module is coupled to the second pin 4_2 of the computer and also to the third pin 10_3 of signal processing module. The second pin 10_2 of the signal processing module is coupled to the third pin 4_3 of the computer and the third pin 10_3 of the signal processing module is coupled to the second pin 8_2 of the power supply module. A fourth pin 10_4 of the signal processing module is adapted to generate a filtered signal to at least one other function of the engine control computer 4.
    In addition, the internal structure of the signal processing module 10 may include a first capacitor 14 having a first pin 14_1 of first capacity and a second pin 14_2 of first capacity. The second pin 14_2 of first capacity is coupled to the electrical ground and the first pin 14_1 of first capacity is coupled on the one hand to a first pin 16_1 of resistance and on the other hand to the third pin 10_3 of signal processing module . In addition, the third pin 10_3 is coupled to the first pin 10_l. The signal processing module 10 also has a resistor 16 having a second resistor pin 16_2. The second resistor pin 16_2 is coupled to the fourth signal processing module pin 10_4. The values of the various elements, such as the resistances and the capacity are well known to those skilled in the art and therefore are not given here.
    FIG. 2 shows an example of a sensor 20 of the current source type of the prior art. This current source type sensor 20 operates and is coupled to the engine control computer 4. The current source type sensor 20 delivers information in the form of a current variation requiring a different hardware interface 6 at the engine control computer 4 in order to be able to detect close current levels coming from the source source sensor 20. current.
    To do this, it can be used a resistor 30 named by those skilled in the art shunt resistor having a first resistance pin 30_l and a second resistance pin 30_2. The first resistance pin 30_l is coupled to the power supply of said engine control computer 4, the second resistance pin 30_2 is coupled on the one hand to the second computer pin 4_2 and on the other hand to a first pin 32_1 of conversion device. The conversion device 32 is adapted to compare and adapt the voltage applied to the second resistance pin 30_2 and the reference voltage applied to the second conversion device pin 32_2.
    The conversion device 32 is in an exemplary embodiment a comparator assembly produced using an operational amplifier. The conversion device 32 also has a second pin 32_2 of the conversion device coupled to a reference voltage. The value of the reference voltage can for example be 4.5V. In addition, the conversion device 32 has a third pin 32_3 of the conversion device coupled to internal functions of the engine control computer 4. The latter is therefore suitable for generating an electrical signal in the form of at least two voltage levels representative of the current passing through the shunt resistor 30. Preferably, the shunt resistor 30 has a relatively low value of the order of, for example, 10 Ohms.
    As mentioned above in the description text, for each type of sensor 2 or 20 it is therefore necessary upstream to modify the internal structure of the hardware interface 6.
    The invention proposes, as illustrated in FIG. 3, a new hardware interface 6 allowing the coupling of either a voltage source type sensor or a current source type sensor without modifying the internal structure of the interface upstream. hardware 6.
    To do this, cleverly, there is proposed a hardware interface 6 comprising an adaptation module 50 and a processing module 60. Thanks to this new hardware interface 6, it is now possible to connect either to the control computer 4 motor a voltage source type sensor or a voltage source type sensor without modifying the internal interface of said engine control computer 4.
    The adaptation module 50 has, in one embodiment of the invention, a first pin 50_l of adaptation module, a second pin 50_2 of adaptation module, a third pin 50_3 adaptation module coupled respectively , to the first computer pin 4_1, to the second computer pin 4_2 to the third computer pin 4_3. The adaptation module 50 also has at least a fourth pin 50_4 of the adaptation module.
    The first pin 50_l of the sensor detection module, the second pin 50_2 of the sensor detection module and the third pin 50_3 of the sensor detection module are suitable for receiving signals from a coupled sensor 2, 20 audit pins. As a variant, at least one of these three pins is adapted to supply electrical energy to the sensor 2, 20.
    As mentioned above in the description text, in the case of a voltage source type sensor 2, the signal generated by said sensor 2 coupled to said pins of said engine control computer 4 is typically of the order of 5V at rest, i.e. engine off.
    In addition, as mentioned above in the text of the description, in the case of a sensor 20 of the current source type, the signal generated by said sensor 20 coupled to said pins of said engine control computer 4 is typically of around 4.5V at rest, i.e. with the engine off.
    Cleverly, the adaptation module 50 is adapted to firstly detect the type of sensor 2, 20 coupled to the engine control computer 4 and secondly adapt the impedance at these input pins to allow both the proper functioning of the sensor 2, 20 and also read the information delivered by the latter.
    Thus, for example, in one embodiment of the invention, when the sensor 2, 20 coupled to the engine control computer 4 is a voltage source type sensor, then the adaptation module 50 selects between the pins of said computer 4 (coupled to sensor 2) a resistance with a high impedance of the order of 1000 Ohms. The equivalent electronic circuit in this embodiment is then the circuit shown in Figure 1. The operation of the adapter module 50 in this embodiment is also similar to that of the electronic circuit of Figure 1 presented above.
    In the case where the sensor 20 is a current source type sensor then the adaptation module 50 selects between the pins of said computer 4 (coupled to the sensor 20) a resistance with a relatively low impedance of the order of 10 Ohms. For example, the equivalent electronic circuit in this embodiment is the circuit shown in Figure 2; the operation is also identical to that of FIG. 2.
    Advantageously, thanks to the invention, the type of sensor 2, 20 is detected instantaneously before, for example, the start of the internal combustion engine. In addition, it is thanks to the invention to change the sensor 2, 20 and also change the type of sensor without performing software calibration. The electronic structure of the adaptation module 50 can be produced as imagined by those skilled in the art with various technological solutions which in no case will limit the scope of the invention.
    The fourth pin 50_4 is adapted to deliver a signal representative of the movement of a target in front of the sensor 2, 20 regardless of its type, that is to say a voltage source type sensor or a current source type sensor .
    The processing module 60 therefore has a first pin 60_l adapted to firstly be coupled to the fourth pin 50_4 of the adaptation module and secondly to receive said signal representative of the movement of the target in front of said sensor 2, 20. The processing module 60 also has a second pin 60_2 adapted to deliver to at least one other module of the engine control computer 4 a signal representative of the movement of the target. In an exemplary embodiment, the processing module 60 performs a filtering function.
    Thus, thanks to the invention, it is now possible to couple either a voltage source type sensor or a current source type sensor without any calibration beforehand. In addition, cleverly, no software calibration is necessary.
    In an alternative embodiment, it is also used in the hardware interface a recording module (not shown in the figures) allowing, after the detection of the type of sensor, to record the type of sensor connected to said computer engine control. Thus, a reset is cleverly carried out each time the sensor type is coupled to said engine control computer.
    In another variant, the hardware interface includes a module for detecting teeth on the signal delivered by the sensor.
    权利要求:
    Claims (1)
    [1" id="c-fr-0001]
    Claims [Claim 1] Computer (4) comprising a first computer spindle (4_1), a second computer spindle (4_2), a third computer spindle (4_3), characterized in that it comprises an adaptation module (50) suitable for d firstly determine a type of electronic device coupled to said first computer pin (4_1), second computer pin (4_2), third computer pin (4_3), and secondly adapt an internal impedance on at least one of the three pins (4_1, 4_2, 4_3). [Claim 2] Calculator (4) according to claim 1 characterized in that the internal impedance can take two values of impedance. [Claim 3] Computer (4) according to claim 2 characterized in that the internal impedance is achieved by at least two resistors coupled in series. [Claim 4] Computer (4) according to any one of the preceding claims, characterized in that it further comprises a processing module (60) adapted to process a signal coming from the adaptation module (50). [Claim 5] Set of a computer (4) and an electrical device according to the preceding claims, characterized in that the electronic device is a sensor (2). [Claim 6] Assembly of a computer (4) and an electrical device according to the preceding claim in which the sensor (2) can be a voltage source type sensor or a current source type sensor. [Claim 7] Assembly of a computer (4) and an electrical device according to the preceding claim in which an adaptation module (50) determines the type of sensor (2, 20) coupled to the computer (4) and adapts the impedance to at least one of the three pins (4_1, 4_2, 4_3) of the computer (4) depending on the type of sensor (2, 20). [Claim 8] Assembly of a computer (4) and an electrical device according to the preceding claim in which the adaptation module (50) is adapted to determine the type of sensor (2, 20) coupled to the computer (4) by measurement a voltage across the sensor (2, 20).
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    同族专利:
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    引用文献:
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    WO2022017840A1|2020-07-21|2022-01-27|Vitesco Technologies GmbH|Device for automatically detecting coupling between electronic devices|
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    法律状态:
    2019-12-19| PLFP| Fee payment|Year of fee payment: 2 |
    2020-06-26| PLSC| Publication of the preliminary search report|Effective date: 20200626 |
    2020-12-23| PLFP| Fee payment|Year of fee payment: 3 |
    2021-12-24| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1873349A|FR3090925B1|2018-12-19|2018-12-19|Device for automatic detection of coupling between electronic devices|FR1873349A| FR3090925B1|2018-12-19|2018-12-19|Device for automatic detection of coupling between electronic devices|
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