• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
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  • 优先权
    • 专利摘要:
    Computer (4) comprising a hardware interface (100) characterized in that the hardware interface (100) comprises a first resistor (110) with a first pin (110_1) of first resistance and a second pin (110_2) of first resistance, a second resistor (120) with a first pin (120_1) of second resistance and a second pin (120_2) of second resistance, a transistor (130), a comparator (140); the first pin (110_1) of first resistance being coupled on the one hand to the first pin (100_1) of hardware interface and on the other hand to a first pin (130_1) of transistor. Figure 3
    公开号:FR3090888A1
    申请号:FR1873330
    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
    Technical area
    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. Prior art
    [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.
    Summary of the invention
    The invention provides an automatic coupling detection device making it possible to partially or completely remedy the technical shortcoming of the cited prior art.
    To this end, a first aspect of the invention provides a computer comprising a first computer pin, a second computer pin, a third computer pin, a hardware interface comprising a first hardware interface input, a second hardware interface input, a third hardware interface input respectively coupled to the first computer pin to the second computer pin and to the third computer pin, characterized in that the hardware interface comprises a first resistor with a first first resistance pin and a second first resistance pin, a second resistance with a first second resistance pin and a second second resistance pin, a transistor, a comparator; the first pin of the first resistor being coupled on the one hand to the first hardware interface pin and on the other hand to a first transistor pin; the second pin of first resistance being further coupled on the one hand to the first pin of second resistance and on the other hand to a second transistor pin, the transistor comprising a third pin; the second second resistance pin being coupled on the one hand to the second hardware interface pin and on the other hand to a second comparator input; the second hardware interface pin being coupled to the first hardware interface output; the comparator further comprising a first input; the first comparator output being coupled to the second hardware interface output.
    The invention proposes in another aspect a method of automatic detection of a sensor coupled to an electronic computer comprising the following steps:
    A. First step e1) switching of a transistor in order on the one hand to short-circuit a first resistor and on the other hand to apply between a first computer pin and a second computer pin an impedance of the order of a second resistance ,
    B. Second step e2) reading of a signal generated by said sensor coupled to the computer,
    C. Third step e3) comparison of the value of the signal generated by the sensor coupled to the computer with a reference value Vrefl, in the case where the result of the comparison is positive then go to a fourth step e4) and in the case where the result of the comparison is negative go to a sixth step e6),
    D. Fourth step e4) signaling the presence of a short-circuit type fault at the sensor battery voltage,
    E. Sixth step e6) comparison of the value of the signal representative of the sensor coupled to the computer with a reference value Vref2, in the case where the result of the comparison is negative then go to an eighth step e8) and in the case where the result of the comparison is positive go to a fourteenth step el4),
    F. Eighth step e8) comparison of the value of the signal representative of the sensor coupled to the computer with a reference value Vref3, in the case where the result of the comparison is negative then go to an eleventh step el 1) and in the case where the result of the comparison is positive go to a ninth step e9),
    G. Ninth step e9) signaling the presence of a short-circuit type fault in an electrical ground of the sensor,
    H. Step 11 and 1) modification of the hardware interface to be compatible with a current source type sensor,
    I. Fourteenth step el4) modification of the hardware interface to be compatible with a voltage source type sensor.
    In an exemplary embodiment, the method of automatic detection of a sensor coupled to an electronic computer according to the present invention presents in step eleven el 1) the modification of the hardware interface consisting in applying to a first pin of computer and on a second computer pin an impedance of the order of the impedance of a second resistor.
    For example, in the eleventh step el 1) a signal from the current source type is processed.
    The automatic detection method of a sensor to an electronic computer can for example in the fourteenth step el4) present a modification of the hardware interface consisting in applying to a first computer spindle and to a second computer spindle a impedance of the order of the impedance of the first resistance.
    Brief description of the drawings
    A preferred embodiment of the invention will now be described with reference to the accompanying drawings in which:
    [Fig-1] shows a schematic view of a computer of the prior art coupled to a voltage source type sensor.
    [Fig.2] shows a schematic view of a computer of the prior art coupled to a sensor of the current source type.
    [Fig.3] shows a schematic view of a computer having a hardware interface according to the invention.
    [Fig.4] shows an algorithm of the method according to the present invention.
    Figure 1 illustrates a sensor 2 of the voltage source type of the prior art coupled for example to a computer 4 engine control. 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 computer 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 adapted to supply 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 known as a "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 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, 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 100 allowing the coupling either of a sensor 2 of the voltage source type or a sensor 20 of the current source type without modifying in advance the internal structure of the hardware interface 100.
    To do this, cleverly, it is proposed a hardware interface 100 adapted to connect either to the engine control computer 4 a sensor 2 of the voltage source type or a sensor 20 of the current source type without any need for modification of the hardware interface 100 of said engine control computer 4.
    The hardware interface 100 comprises in a preferred embodiment, a first input 100_l of hardware interface, a second input 100_2 of hardware interface, a third input 100_3 of hardware interface respectively coupled to the first pin 4_1 of computer at the second computer pin 4_2 and at the third computer pin 4_3. The hardware interface 100 further includes a first hardware interface output 100_4 and a second hardware interface output 100_5, coupled to internal and / or external devices of the engine control computer 4.
    The hardware interface 100 includes a first resistor 110, a second resistor 120, a transistor 130, and a comparator 140. The first resistor 110 has a first pin 110_l of first resistance and a second pin 110_2 of first resistance; the second resistor 120 comprises a first pin 120_l of second resistance and a second pin 120_2 of second resistance 120. The first pin 110_l of first resistance is coupled on the one hand to the first pin 100_l of hardware interface and on the other hand to a first transistor pin 130_l. The second pin 110_2 of first resistance is coupled on the one hand to the first pin 120_l of second resistance and on the other hand to a second pin 130_2 of transistor. In addition, the transistor 130 has a third transistor pin 130_3 corresponding in the case of a transistor 130 of the MOS type for Metal Oxide Semiconductor to the gate as known to those skilled in the art.
    The second pin 120_2 of second resistance is coupled on the one hand to the second pin 100_2 of the hardware interface and on the other hand to a second input 140_2 of comparator. In addition, the second hardware interface pin 100_2 is coupled to the first hardware interface output 100_4.
    The comparator 140 further comprises, a first input 140_l coupled to a reference voltage which may have in an exemplary embodiment a value of 4.5V. The first comparator output 140_3 is coupled to the second hardware interface output 100_5. The third hardware interface input 100_3 is coupled to an earth of the motor vehicle.
    Thus, thanks to the hardware interface 100 according to the invention and more precisely thanks to the combination of the coupling of the first resistor 110, the second resistor 120 and the transistor 130 it is possible to select an impedance value low corresponding to the value of the second resistor 120 or a high impedance value corresponding to the value of the first resistor 110 added to the value of the second resistor 120 between the first pin 100_l of hardware interface and the second pin 100_2 d hardware interface. It is understood by low impedance value a value of the order of ten Ohms and by large impedance value a value of the order of a thousand Ohms.
    As mentioned above in the text of the description, it is coupled to the first pin 4_1 of the computer, to the second pin 4_2 of the computer and to the third pin 4_3 of the computer, either a sensor 2 of the voltage source type or a current source type sensor 20.
    The invention further provides a method as shown in FIG. 4 for controlling the hardware interface 100 making it possible to automatically detect the type of sensor 2 or 20 coupled to the engine control computer 4.
    The method according to the present invention has a first step el consisting in switching the transistor 130 in a closed state making it possible to short-circuit the first resistor 110. Thus, during this first step el, it is applied between the first computer pin 4_1 and the second computer pin 4_2 an impedance equivalent to the impedance of the second resistor 120. The control of transistor 130 is carried out by a control signal applied to the third pin 130_3 of said transistor. Such a control signal is well known to those skilled in the art therefore it will not be presented or further explained.
    In a second step e2, a signal is carried out on the first output 100_4 of the hardware interface representative of an input voltage of the sensor 2 coupled to the engine control computer 4. The second step e2 can be carried out by a module internal to the engine control computer 4 which will not be presented here since it is useless for understanding the process of the invention. Once the signal present on the first hardware interface output 100_4 has been read, a third step e3 is then carried out.
    In the third step e3, a comparison is made of the value of the signal present on the first output 100_4 of the hardware interface with a reference value Vrefl. For example, the reference value is Vrefl = 6V. In the case where the result of the comparison is positive then the method provides for the transition to a fourth step e4 and in the case where the result of the comparison is negative the transition to a sixth step e6. In an exemplary embodiment, the comparison of the value of the signal present on the first output 100_4 is carried out by an external module at the hardware interface 100.
    According to the method of the invention in the case where the result of the comparison is positive (third step e3), this has the meaning, according to the fourth step e4, of the presence of a battery short circuit at the level of the sensor 2, 20 coupled to the engine control computer 4. This fault can for example be detected when the sensor 2, 20 has failed. The method of the invention provides, during a fifth step e5 in this case, the generation of a software alert allowing for example to inform the engine control computer 4 of such a failure at sensor 2 , 20.
    According to the method of the invention, during the sixth step e6, another comparison is made of the value of the signal present on the first output 100_4 with a reference value Vref2. For example, the reference value is Vref2 = 4.7V. In the case where the result of the comparison is negative then the method provides for the transition to an eighth step e8 and in the case where the result of the comparison is positive the transition to a fourteenth step el4.
    According to the method of the invention, during the eighth step e8, a comparison is made of the value of the signal present on the first output 100_4 with a reference value Vref3. For example, the reference value is Vref3 = IV. In the case where the result of the comparison is negative then the method provides for the transition to an eleventh step el 1 and in the case where the result of the comparison is positive the transition to a ninth step e9.
    In the case where the result of the comparison is positive (eighth step e8), this means, according to the method of the invention, the presence of an electrical ground short circuit at the level of the sensor 2, 20 coupled to the engine control computer 4. This fault can for example be detected when the sensor 2, 20 is defective. The method of the invention then provides, during a tenth step elO, for the generation of a software alert making it possible, for example, to inform the engine control computer 4 of such a failure at sensor level 2, 20.
    In the case where the result of the comparison is negative (eighth step e8) this has the meaning, according to the method of the invention and its eleventh step el 1, the presence at the terminals of the engine control computer 4 a current source type sensor 20.
    During a twelfth step el2, a software configuration of the hardware interface 100 is carried out so that the impedance across the terminals of the engine control computer 4 coupled to the sensor 20 is of a low value corresponding to the coupling d a sensor 20 of the current source type. To do this, during the twelfth step el2, the transistor 130 is controlled in order to short-circuit the first resistor 110 so that it is applied between the first pin 100_l and the second pin 100_2 only the impedance of the second resistor 120. Thus, the impedance between the first pin 100_l and the second pin 100_2 is of the order of 10 Ohms. Thus, thanks to the method of the invention, it is possible to modify the hardware interface 100 in a software manner when it is detected at the terminals of the hardware interface 100 a sensor 20 of the current source type.
    The method then provides for the passage to a thirteenth step el3 during which it is for example sent to a dedicated module of the engine control computer 4 information corresponding to the detection and valid connection of a sensor 20 of the current source type and also the measurement of signals delivered by the second hardware interface output 100_5.
    During the fourteenth step el4, it is according to the method of the invention detected the presence at the terminals of the engine control computer 4 the presence of a sensor 2 of the voltage source type. Information of such a presence is for example sent by a signal dedicated to a module of the engine control computer 4.
    Then, it is during the passage to a fifteenth step el5 controlled the transistor 130 in order to put in series the first resistor 110 and the second resistor 120. To do this, the method of the invention provides for the control of the transistor 130 so that it exhibits the behavior of an open switch. Those skilled in the art will understand the form and type of signal to be applied to transistor 130 and therefore will not be discussed further here.
    It is then during a sixteenth step el6 carried out a software configuration of the hardware interface 100 to allow the reading of the signals delivered by the sensor 2 of the voltage source type.
    In a seventeenth step e 17, it is tested if the engine is running. To do this, the signal present on the second hardware interface output 100_5 is analyzed. In the case where, for example, slots appear on said signal, then this means that the internal combustion engine is running and the method then provides for the passage to an eighteenth step el8. Conversely of course, if no slot is present then this has the meaning according to the method of the invention that the engine is stopped and the method then provides for the passage again to the seventeenth step el7.
    [0062] During the eighteenth step el8, the signal present on the second output 100_5 of the hardware interface is tested. In the case where slots are present then the method provides for the passage to a nineteenth step el9 synonymous with proper operation of the sensor 2 of the voltage source type. In the event that no slot is present, then the method provides for the transition to a twentieth step e20.
    During the nineteenth step el9, the method of the invention provides for the generation of information to at least one other module of the engine control computer 4 synonymous with the presence and proper functioning of the sensor 2 of source type of voltage. The control signals and also the signals generated by the voltage source type sensor 2 are processed in order to detect the state of rotation of the internal combustion engine for example.
    During the twentieth step e20, synonymous with the absence of a slot on the signal present on the second output 100_5 of the hardware interface, it is according to the method of the invention detected on the pins of the engine control computer 4 a failure at the level of the voltage source type sensor 2, failure therefore corresponding to an open circuit. A twenty-first step e21 is then launched.
    During the twenty-first step, it is generated, for example, open circuit type fault information at the level of the sensor 2 of the voltage source type, invalidation generated and sent to modules of the engine control computer 4 for treatment and decision making.
    Thanks to the invention, it is now possible to detect the presence at the terminals of an engine control computer of a voltage source and / or current source sensor automatically. In addition, it is now possible to change the type of sensor during the life of the engine control computer without changing the latter depending on the type of sensor.
    The electronic circuits of the hardware interface are given by way of illustration and are in no way limiting as to the scope of the invention. Concerning the progress of the stages of the process of the invention and their number, they are also given by way of illustration and the person skilled in the art can modify them at will in order to arrive at the same result.
    权利要求:
    Claims (1)
    [1" id="c-fr-0001]
    Claims [Claim 1] Computer (4) comprising a first computer pin (4_1), a second computer pin (4_2), a third computer pin (4_3), a hardware interface (100) comprising a first hardware interface input (100_l), a second hardware interface input (100_2), a third hardware interface input (100_3) coupled respectively to the first computer pin (4_1) to the second computer pin (4_2) and to the third computer pin (4_3) computer, characterized in that the hardware interface (100) comprises a first resistor (110) with a first pin (110_l) of first resistance and a second pin (110_2) of first resistance, a second resistor (120) with a first second resistance pin (120_l) and a second second resistance pin (120_2), a transistor (130), a comparator (140); the first pin (110_l) of first resistance being coupled on the one hand to the first pin (100_l) of hardware interface and on the other hand to a first pin (130_l) of transistor; the second pin (110_2) of first resistance being further coupled on the one hand to the first pin (120_l) of second resistance and on the other hand to a second pin (130_2) of transistor, the transistor (130) comprising a third spindle (130_3); the second pin (120_2) of second resistance being coupled on the one hand to the second pin (100_2) of hardware interface and on the other hand to a second comparator input (140_2); the second hardware interface pin (100_2) being coupled to the first hardware interface output (100_4); the comparator (140) further comprising a first input (140_l); the first comparator output (140_3) being coupled to the second hardware interface output (100_5). [Claim 2] Method for automatically detecting a sensor (2, 20) coupled to an electronic computer (4) according to the preceding claim, comprising the following steps:at. First step el) switching of a transistor (130) so as to short-circuit a first resistor (110) and on the other hand to apply between a first computer pin (4_1) and a second pin (4_2) calculating an impedance of the order of a second resistance (120),b. Second step e2) reading of a signal generated by said sensor (2,
    20) coupled to the computer (4), c. Third step e3) comparison of the value of the signal generated by the sensor (2, 20) coupled to the computer (4) with a reference value Vrefl, in the case where the result of the comparison is positive then go to a fourth step e4) and in the case where the result of the comparison is negative go to a sixth step e6), d. Fourth step e4) signaling the presence of a short-circuit type fault at the sensor battery voltage (2, 20), e. Sixth step e6) comparison of the value of the signal representative of the sensor (2, 20) coupled to the computer (4) with a reference value Vref2, in the case where the result of the comparison is negative then go to an eighth step e8) and in the case where the result of the comparison is positive go to a fourteenth step el4),f. Eighth step e8) comparison of the value of the signal representative of the sensor (2, 20) coupled to the computer (4) with a reference value Vref3, in the case where the result of the comparison is negative then go to an eleventh step el 1) and in the case where the result of the comparison is positive go to a ninth step e9),g. Ninth step e9) signaling the presence of a short-circuit type fault in an electrical ground of the sensor (2, 20), h. Eleventh step ell) modification of the hardware interface (100) to be compatible with a sensor (2, 20) of the current source type, i. Fourteenth step el4) modification of the hardware interface (100) to be compatible with a voltage source type sensor (2, 20). [Claim 3] Method for automatically detecting a sensor (2, 20) coupled to an electronic computer (4) according to the preceding claim, in which in the eleventh step el 1) the modification of the hardware interface (100) consisting in applying to a first computer pin (4_1) and on a second computer pin (4_2) an impedance of the order of the impedance of a second resistor (120). [Claim 4] Method for automatically detecting a sensor (2, 20) in an electronic computer (4) according to any one of claims 2 or 3, in which in the eleventh step el 1) a signal from the sensor (2) is processed , 20) of current source type. [Claim 5] Method for automatically detecting a sensor (2, 20) in an electronic computer (4) according to the preceding claim, in which in the fourteenth step el4) the modification of the hardware interface (100) consisting in applying to a first pin (4_1) calculator and
    on a second computer pin (4_2) an impedance of the order of the impedance of the first resistor (110).
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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
    FR1873330A|FR3090888B1|2018-12-19|2018-12-19|Device for automatic detection of coupling between electronic devices|FR1873330A| FR3090888B1|2018-12-19|2018-12-19|Device for automatic detection of coupling between electronic devices|
    US17/414,118| US20220050146A1|2018-12-19|2019-12-19|Device for automatic detection of coupling between electronic devices|
    CN201980084341.2A| CN113167822A|2018-12-19|2019-12-19|Automatic detection device for connection between electronic devices|
    PCT/EP2019/086219| WO2020127672A1|2018-12-19|2019-12-19|Device for automatic detection of coupling between electronic devices|
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