CN116259991A - Electronic assembly with position coding for a motor vehicle - Google Patents

Electronic assembly with position coding for a motor vehicle Download PDF

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Publication number
CN116259991A
CN116259991A CN202211384790.9A CN202211384790A CN116259991A CN 116259991 A CN116259991 A CN 116259991A CN 202211384790 A CN202211384790 A CN 202211384790A CN 116259991 A CN116259991 A CN 116259991A
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China
Prior art keywords
terminals
position terminals
electronic assembly
cable
pin
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Pending
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CN202211384790.9A
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Chinese (zh)
Inventor
F·巴杰福斯
J·普勒特
S·席克
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Bayerische Motoren Werke AG
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Bayerische Motoren Werke AG
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Publication of CN116259991A publication Critical patent/CN116259991A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66Structural association with built-in electrical component
    • H01R13/70Structural association with built-in electrical component with built-in switch
    • H01R13/703Structural association with built-in electrical component with built-in switch operated by engagement or disengagement of coupling parts, e.g. dual-continuity coupling part
    • H01R13/7031Shorting, shunting or bussing of different terminals interrupted or effected on engagement of coupling part, e.g. for ESD protection, line continuity
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)

Abstract

The invention relates to an electronic component (10) for a motor vehicle with position coding. The electronic assembly comprises a plurality of first position terminals (31-34) configured for connection with a corresponding plurality of respective second position terminals (61-64) arranged at an assembly-side end of a cable harness (50) of a motor vehicle. The electronic assembly further includes an evaluation circuit (40) coupled to the first position terminals (31-34). When a connection is established between the plurality of first position terminals (31-34) and the corresponding plurality of second position terminals (61-64), the evaluation circuit is configured to: determining a first or a second electrical connection state for each of the first position terminals (31-34), the connection state of each of the first position terminals being dependent on whether the second position terminals (61-64) of the cable bundle and which of them are connected to each other via a cable bridge (65); and deducing the coding of the component (10) from the pattern of the first position terminals (31-34) having the first or second connection state.

Description

Electronic assembly with position coding for a motor vehicle
Technical Field
The invention relates to an electronic component for a motor vehicle with position coding.
Background
In motor vehicles, electrical or electronic components of identical construction are often installed several times. Examples of such electronic components are radar sensors mounted on or near the front bumper and/or at various locations on or near the rear bumper, seat modules for electrically adjusting the motor vehicle seat, seat heating controllers, seat pneumatic modules, rear seat displays, wireless charging trays (so-called Wireless Charging Ablagen), etc. In order to be able to determine the position of the corresponding structurally identical electrical or electronic component in the motor vehicle for actuation by the central control unit, so-called ground wire codes are used for the position codes.
In the ground wire coding, other ground wire interfaces are connected to each other by a cable harness in addition to the main ground wire of the electrical or electronic component. For this purpose, the cable harness which is electrically contacted to the component has so-called soldered connections which electrically connect the different ground wires to one another, for example by means of an ultrasonic soldered connection. The corresponding new position of the electrical or electronic component in the motor vehicle can be achieved by selective contact-making of the different ground interfaces of the component in that it is determined to which ground interface the ground wire of the cable harness is connected by means of the evaluation circuit. The evaluation circuit generally has an analog/digital (a/D) converter for this purpose, which detects a reference voltage generated inside the component for ground encoding. The variant and thus the position of the electrical or electronic component in the motor vehicle can then be determined from the values measured for each ground connection.
The principle of position detection by means of ground wire coding is illustrated by means of fig. 1, wherein fig. 1a to 1d each show an identical electronic assembly 10, which has, for example, three ground wire connections 11-13, which are contacted differently by differently configured cable bundles 50. In addition to the ground interfaces referred to as external ground interfaces 11-13, electronic assembly 10 also includes internal ground interfaces 21-23, respectively, that are mated. For simplicity, the evaluation circuitry required for evaluating the ground wire code and other functional components of the electronic assembly 10 are not shown. As can be readily seen from fig. 1, the respective external ground connection 11-13 is directly connected to the associated internal ground connection 21-23. The internal ground connection 21 forms a so-called main ground or vehicle ground. The remaining internal ground interfaces 22, 23 constitute a ground connected to the main ground 21 and are referred to as coded ground, wherein the ground interfaces are not explicitly shown in the figures.
The cable bundle 50 is separately constructed for each code of the electronic assembly 10. In the variant shown in fig. 1a, the cable bundle 50 comprises a ground wire 51; in the variant shown in fig. 1b and 1d, the cable bundle 50 comprises, in addition to one main line 55, two ground lines 51 and 52 or 51 and 53, respectively. In the variant shown in fig. 1c, the cable bundle 50 comprises, in addition to the overall line 55, three ground lines 51, 52 and 53. The respective ground lines 51 and 52 (fig. 1 b), 51 to 53 (fig. 1 c) and 51 and 53 (fig. 1 d) for the four structurally identical components 10 are each electrically connected to the bus line 55 by means of a solder connector 54. The weld connector 54 may be manufactured, for example, by ultrasonic welding and is referred to as an ultrasonic weld connector in this case. The welded connection 54 is generally embodied here as a so-called end connection, on which a shrink cap or a shrink tube, respectively with an internal adhesive, is heat-shrunk. The flanges and the tie-backs (Zur uckbinden) for relieving the tension of the welded connection are not shown in the schematic illustration.
As can be readily seen from the different variants in fig. 1a to 1d, the external ground connection 11-13 is contacted differently by the cable harness 50. In all four variants, the ground wire 51 is coupled with the external ground wire interface 11 of the main ground wire. A total of four different coding variants result from the additional two coding lines, wherein in the variant according to fig. 1b the external ground connection 12 is connected to the ground line 52, in the variant according to fig. 1c the external ground connection 12, 13 is connected to the ground line 52, 53, and in the variant according to fig. 1d the external ground connection 13 is connected to the ground line 53. In this case, the variant according to fig. 1a does not require explicit coding.
By means of these variants of contact-making, a component position can be defined in each case. The corresponding variant is determined by applying a reference voltage to the internal ground connections 21-23 in the electronic assembly 10 and detecting the reference voltage by an a/D converter of an evaluation circuit, not shown. If the external ground connection to be read is connected to the reference potential via a ground connection of the cable harness, the reference voltage collapses (zusammenbrechnen) and a very small value is measured at the output of the a/D converter. If the external ground interface to be read is not connected to any ground of the cable harness, the reference voltage remains unchanged and a large value corresponding to the reference voltage is measured at the output of the a/D converter. The variant and thus the position can then be determined by means of the values measured for the respective external and thus internal ground interfaces.
For position detection, it is therefore necessary to connect the ground wire of the cable harness with the already mentioned solder connectors (sometimes also referred to as solder joints) individually for each ground wire interface of the component to be contacted for each component of the same structure. Sealing a welded connector against moisture and longitudinal water
Figure BDA0003929283870000031
Shrink caps or shrink hoses must be provided for the welded connectors, with internal adhesive, respectively. In order to relieve the tension of the welded strands of the cable bundle, tie-backs and flanging are required.
Depending on how many different positions have to be encoded by means of a ground wire code, the number of additional wires may be considerable. The additional ground wires leading to the connection weld connector, the weld connector itself including the shrink cap of the weld connector provided for sealing and the strain relief device increase the diameter of the cable bundle over the entire length, which may lead to space problems. The material for the ground wire and for the longitudinal water seal results in weight and cost of the cable bundle for each electrical or electronic component to be installed and having a position identification via the ground wire code.
These problems are exacerbated, particularly because fully automated cable harness production including soldered connectors has heretofore not been possible. Expensive patch plugs must therefore be used instead of soldered connectors in order to fit an automated solution. Alternatively, direct wiring may be made between the electrical or electronic components and the ground node (e.g., comb connector). This also requires additional modifications and in particular requires the provision of a relatively large ground comb connector.
Disclosure of Invention
The object of the invention is to improve the position coding of the electronic components of a motor vehicle structurally and/or functionally.
This object is achieved by an electronic component according to the features of claim 1 and a motor vehicle having an electronic component according to the invention according to the features of claim 11. Advantageous embodiments are given in the dependent claims.
An electronic component for a motor vehicle with a position code is proposed. An electronic component with a position code is to be understood hereinafter as an electrical or electronic component which is to be installed in a motor vehicle several times in a structurally identical manner. Such components may be, for example, radar sensors, lidar, cameras, light modules, seat modules for electrically adjusting motor vehicle seats, seat heating controllers, seat pneumatic modules, rear seat displays or trays for wireless charging of user terminals. The list should be regarded as illustrative rather than exhaustive. A plurality of electronic components among the electronic components having the position codes are mounted at different positions in the vehicle, respectively.
In order to be able to carry out a positionally correct actuation of the electronic components or a positionally correct processing of the signals provided by the electronic components, the respective electronic components are identified in conjunction with the cable harness in the manner described below (when the electronic components are installed in the motor vehicle). For this purpose, the electronic assembly comprises a plurality of first position terminals configured for connection with a corresponding plurality of respective second position terminals arranged at the assembly-side end of the cable harness of the motor vehicle. The first position terminal and the second position terminal corresponding to the first position terminal may be configured, for example, as pins for establishing a plug connection. Other connection means are also conceivable.
The evaluation circuit of the electronic component coupled to the first position terminals is configured to perform the steps described below, which are however only performed when a connection has been established between the plurality of first position terminals and the plurality of corresponding second position terminals of the cable harness. In other words, the component-side end of the cable bundle is mechanically connected with the electronic component, thereby establishing an electrical connection between the first position terminal and the second position terminal.
The evaluation circuit is configured to determine a first electrical connection state or a second electrical connection state for each of the first position terminals. The connection state of each of the first position terminals depends on: whether the second position terminals of the cable harness are connected to each other via a cable bridge and which of the second position terminals are connected to each other via a cable bridge. Here, the connection state is not to be understood as a mechanical connection state between the first position terminal and the second position terminal connected thereto, but as an electrical connection state. The connected state refers in particular to a first connected state, which may be referred to as "disconnected" or "unconnected", and a second connected state, which may be referred to as "connected".
The evaluation circuit is further configured to infer an encoding of the component from a pattern of the first position terminal having the first connection state or the second connection state. The code may be transmitted to a central controller, for example. The code may also be further processed within the electronic component. A combination of the two variants described above is also possible.
The manner in which the evaluation circuit is constructed is not important to the principles of the present invention. For example, the evaluation circuit may comprise a microcontroller with so-called GPIO (General Purpose Input-Output) terminals as first position terminals, which terminals may be selectively used as input or Output terminals in order to determine the first or second electrical connection state for each of the first position terminals. The evaluation circuit may also include an analog/digital converter (a/D converter) that determines the potential applied to the first position terminal. To infer the coding of the component, the evaluation and determination of the pattern of the first position terminal can be performed once at the time of manufacture of the vehicle or at each restart of the vehicle or at regular intervals.
With the electronic component according to the invention, the position of each electronic component in the motor vehicle which is structurally identical can be reliably determined via a plurality of first position terminals on the electronic component and a corresponding plurality of corresponding second position terminals of the cable harness. The position code is determined by the electronic component, wherein the code can be realized by a "coupling" of the second position terminal, which is present on the cable side.
The plurality of first position terminals and the corresponding plurality of corresponding second position terminals are used here only for realizing a position coding of structurally identical electronic components. The first position terminal and the second position terminal are used neither for signal transmission nor as potential conductors. The welded connector for position recognition can be removed by the proposed method together with the longitudinal water seal. This allows for a significantly simpler, lighter weight and lower cost provision of the cable bundle.
According to one expedient embodiment, the plurality of first position terminals is arranged in a first plug connector of the assembly. As already described above, the first position terminal is embodied, for example, as a pin for establishing a plug connection.
An expedient embodiment provides that the plurality of second position terminals are arranged in a second plug connector of the cable harness, which corresponds to the first plug connector. In other words, the first plug connector and the second plug connector are halves of one connector, one of which is formed as a male side and the other as a female side. Thereby, the module-side end portion of the cable harness can be mechanically connected to the electronic module. The second position terminal may be configured as a sleeve corresponding to the pin. This enables a preferred plugging process.
It is furthermore advantageous if the first plug connector and the second plug connector each comprise one or more terminals for data transmission and/or one or more terminals for supply potential in addition to the plurality of first position terminals and the plurality of second position terminals. The terminals for data transmission and/or the terminals for supply potential can be integrated in the first plug connector and the second plug connector, respectively. They may also be arranged in a plug connector separate from the first plug connector and the second plug connector.
Another expedient embodiment provides that the plurality of first position terminals and the corresponding second position terminals are three or more. The exact number of the plurality of first position terminals and second position terminals determines the number of possible encodings. Preferably, the plurality of first position terminals and the plurality of second position terminals are four.
It is furthermore expedient if the two second position terminals are electrically connected to one another via the respective ends of the cable bridge. Thus, one cable bridge is always connected to just two second position terminals. Preferably, the number of cable bridges is one. The number of cable bridges may also be greater than one. The number of cable bridges in combination with the number of first position terminals or second position terminals determines how many different codes are possible for a structurally identical electronic component. In case the number of first position terminals and second position terminals is for example four and exactly one cable bridge is used, six different codes are obtained. The number of codes can be increased by adding further cable bridges. Alternatively or additionally, the number of first position terminals and second position terminals may also be increased if a larger number of encodings is required.
Another embodiment provides that the second position terminal, which is not connected to the end of the cable bridge, has no electrical connection to the conductor. Such a second position terminal which is not connected to the end of the cable bridge is a "disconnected" or "unconnected" position terminal, so that in the above-described construction of the evaluation circuit a connection state corresponding to "disconnected" or "unconnected" is determined. In contrast, the second position terminal connected to one end of the cable bridge is in a connection state which can be referred to as "connected" when the other end of the cable bridge is connected to the other second position terminal, because a short circuit is formed between the relevant first position terminals via the cable bridge.
A further advantageous embodiment provides that the respective end of the cable bridge is connected to the two second position terminals by means of a crimp connection.
According to a further aspect of the invention, a motor vehicle is described, which has a plurality of electronic components as described above, which are each constructed according to one or more embodiments. As described, the plurality of electronic components are then arranged as identical components at different positions in the motor vehicle.
Such a motor vehicle has the advantage of a simplified cable harness, which in particular for the assembly according to the invention no longer requires a welded connector. Thereby, the cable harness can be provided with lighter weight and lower cost.
Drawings
The invention is described in more detail below with the aid of embodiments in the accompanying drawings. In the figure:
fig. 1a to 1d each show a conventional electronic component which is designed for position detection via ground coding;
fig. 2 shows an electronic component according to the invention according to a first configuration variant;
fig. 3 shows an electronic component according to the invention according to a second configuration variant;
fig. 4 shows an electronic component according to the invention according to a third configuration variant;
fig. 5 shows an electronic component according to the invention according to a fourth configuration variant.
Detailed Description
Like elements are provided with like reference numerals throughout the drawings. For simplicity and better explanation, only the components important for understanding the present invention are shown.
Fig. 2 shows in general form an electronic assembly 10 according to the invention in which position recognition is achieved by means of the interconnection of the position terminals of the assembly itself, whether or not present on the cable bundle side. Fig. 3 to 5 show a detailed embodiment, in which the position detection is achieved by different configurations of the evaluation circuit 40 described in detail below.
The electronic assembly 10 is installed in a motor vehicle, not shown, in a structurally identical manner several times. Such a component may be, for example, a sensor, an actuator or, in general, a controller. Examples of this are radar sensors, lidar, cameras, light modules, seat modules for electrically adjusting motor vehicle seats, seat heating controllers, seat pneumatic modules, rear seat displays or trays for wireless charging of user terminals. Each electronic component 10 is mounted at a different location in the vehicle.
The electronic component 10 shown here has, by way of example, four first position terminals 31 to 34, which are arranged in the first plug connector 30 of the electronic component. The first position terminals 31 to 34 can be embodied, for example, as pins for establishing a plug connection. The first position terminals 31 to 34, which are arranged in the first plug connector 30 and are accessible from the outside, are electrically coupled to the third position terminals 41 to 44 of the evaluation circuit 40 via an optional and not-illustrated protection circuit 35 to 38.
The evaluation circuit 40 may be, for example, a microcontroller. The principle operation of the evaluation circuit 40 will be explained in more detail later on in accordance with the embodiments of fig. 3 to 5, wherein the details of the configuration of the evaluation circuit 40 are of minor importance for the principle of the invention.
The design of the protection circuits 35 to 38 is likewise of minor importance in principle for the understanding of the invention, so that this will not be discussed in detail. By means of the optional protection circuits 35-38, it should be prevented that the circuit provided in the evaluation circuit 40 is not damaged or destroyed when a potential is applied to one of the first position terminals 31-34.
The first position terminal 31 electrically coupled to the third position terminal 41 via the protection circuit 35 is referred to as "Pin 1". The first position terminal 32 electrically coupled to the third position terminal 42 via the protection circuit 36 is referred to as "Pin 2". The first position terminal 33 coupled to the third position terminal 43 via the protection circuit 37 is referred to as "Pin 3". In a corresponding manner, the first position terminal 34 electrically coupled with the third position terminal 44 via the protection circuit 38 is referred to as "Pin 4".
The number n of first position terminals 31-34 is selected in the present embodiment as n=4 by way of example only. The number n can in principle also be chosen differently, where n.gtoreq.2 is suitable. The number n of first position terminals is typically arranged according to the number of different encodings required.
The component-side end of the cable harness of the motor vehicle is denoted by reference numeral 50. The cable harness 50 includes a plurality of second position terminals 61-64 at its component-side end, the number of which corresponds to the number n of the first position terminals 31-34, i.e., four in the present embodiment. The second position terminals 61-64 are arranged in the second plug connector 60. The arrangement and configuration of the second plug connector 60 and the second position terminals 61 to 64 correspond to the configuration and arrangement of the first plug connector 30 and the first position terminals 31 to 34 located therein, so that a plug connection of the first position terminals and the second position terminals associated with one another is possible. For this purpose, the second position terminals 61-64 may be configured, for example, as sleeves that receive pins.
Similar to the labeling of the first position terminals 31-34, the second position terminal 61 is shown as "Pin 1", the second position terminal 62 is shown as "Pin 2", the second position terminal 63 is shown as "Pin 3", and the second position terminal 64 is shown as "Pin 4".
No data signals are transmitted via the first and second position terminals 31-34, 61-64. Nor is there a voltage potential or ground potential transmitted. The first position terminals 31-34 and the second position terminals 61-64 are used only for position encoding of the electronic assembly 10. The terminals of the electronic assembly 10 and of the cable harness 50 required for transmitting data signals and/or voltage signals are not explicitly shown in the embodiments of fig. 2 to 4.
The position coding takes place by means of a cable bridge 65, the two ends of which illustratively short the second position terminals 61, 62 (Pin 1 and Pin 2). For this purpose, the respective end of the cable bridge 65 (also referred to as jumper) is crimped (vercrimpt) with the second position terminals 61, 62.
When a connection is established between the component-side end of the cable harness 50 and the electronic component 10, that is to say when a connection is established between the associated first and second position terminals 31 and 61, 32 and 62, 33 and 63 and 34 and 64, the position code can be evaluated by means of the evaluation circuit 40.
The evaluation circuit 40 is generally configured to determine whether a first connection state ("disconnected" or "unconnected", hereinafter "n.c.") or a second electrical connection state ("connected", hereinafter "condd.") exists for each of the first position terminals 31-34. Here, the connection state of each of the first position terminals 31 to 34 depends on whether and which of the second position terminals 61 to 64 of the cable harness are connected to each other via the cable bridge 65. With the use of a (single) cable bridge 65 and four first and second positioning pins, a total of six different plug-in positions and thus a characteristic pattern are produced, which enables position coding of the electronic component.
The following examples are based on this: a connection ("condd") of Pin 1 and Pin 2 is established by means of the cable bridge 65, while Pin 3 and Pin 4 have a connection state "n.c.".
In the embodiment shown in fig. 3, the evaluation circuit 40 is constructed as a microcontroller with so-called GPIO (general purpose input-output) terminals 41-44, which are denoted GPIO 1, GPIO 2, GPIO 3 and GPIO 4 in turn. These terminals are characterized in that they can be selectively communicated as inputs or outputs by evaluation circuit 40. Thus, the following possibilities exist: a signal having a signal value "high" (denoted by "Out H" in the table) is sequentially applied to the position terminal Pin 1, pin 2, or Pin 3, and the signal value of the subsequent Pin (Pin 2, pin 3, pin 4, or Pin 4) (denoted by "R H" in the table or denoted by "R L" for a signal value "high") is read Out. The measurement results "MMR" shown in the tables shown below are thus obtained, which include the following cases 1 to 9 from which the position codes are obtained:
Figure BDA0003929283870000101
in cases 1 to 4, the signal "high" is applied to Pin 1 ("Out H"). In all cases 1 to 4, the corresponding signal values, i.e. "R L" or "R H", are then read on Pin 2, pin 3 and Pin 4. In case 1, where a low signal value ("R L") is output on Pin 2, 3 and 4, this results in no electrical connection between Pin 1 and one of the other pins 2, pin 3 or Pin 4 (mmr= "Pin 1 n.c."). In case 2, a high signal value "high" ("R H") is read on Pin 2, and a low signal value ("R L") is read on pins 3 and 4. This means that Pin 1 and Pin 2 are connected to each other via a cable bridge 65 (mmr= "Pin 1-Pin 2 condd"). In case 3, there is a connection between Pin 1 and Pin 3 (mmr= "Pin 1-Pin 3 condd"), while in case 4, there is a connection between Pin 1 and Pin 4 (mmr= "Pin 1-Pin 4 condd").
In cases 5 to 7, the signal "high" is applied to Pin 2 ("Out H"). In a corresponding manner, the signal values on the subsequent pins (Pin 3 and Pin 4) are then read. Depending on whether Pin 2 is connected to one of Pin 3 or 4, either present or not, the result is obtained in case 5: pin 2 has no connection (MMR= "Pin 2 n.c."), in case 6 Pin 2 has a connection to Pin 3 (MMR= "Pin 2-Pin 3 condd"), and in case 7 Pin 2 has a connection to Pin 4 (MMR= "Pin 2-Pin 4 condd"). In cases 8 and 9, the process is similarly repeated for Pin 3, and then the signal value at Pin 4 is read out.
As can be easily seen from the table, six different connectivity possibilities are derived, which are shown in column "MMR" for cases 2, 3, 4, 6, 7 and 9.
Alternatively, there is also the possibility of realizing the second cable bridge 65 for obtaining a greater number of position codes.
Each different case may then be assigned a position code, e.g., case 2: right front, case 3: front left, case 4: right after, case 6: after left, case 7: right, case 9: left. Such an interpretation may be created by an evaluation circuit or a central control unit to which the different signal patterns are fed.
Fig. 4 shows a further embodiment, in which the evaluation circuit 40 has an AD converter. The third position terminals 41-44 represent the terminals ADC1-ADC4 of the analog/digital converter. Furthermore, a voltage divider is provided, which comprises five resistors R having the same resistance value. The resistor R is connected between the third position terminals 41 and 42, 42 and 43, 43 and 44 and between the supply potential terminal Vref and the third position terminal 41 and between the third position terminal 44 and the reference potential terminal GND, respectively.
Depending on which of the second position terminals 61 to 64 the cable bridge 65 in the module-side end of the cable harness 50 is connected between, a respectively characteristic signal pattern is derived from the voltage values, which are determined by the AD converter at its inputs ADC1 to ADC4. In the tables shown below, the voltage ratios appearing at the inputs ADC1-ADC4 of the AD converter are shown according to the "connected" cable bridge 65 or no cable bridge ("none") between the second position terminals 61-62, 61-63, 61-64, 62-63, 62-64, 63-64:
Figure BDA0003929283870000121
fig. 5 shows a further embodiment, in which the evaluation circuit 40 comprises two outputs Out 1 and Out 2 on the third position terminals 41, 43 and two inputs In 1, in 2 on the third position terminals 42, 44. A defined voltage can be applied to the outputs Out 1 and Out 2 by the evaluation circuit 40 and read Out at the inputs In 1, in 2. Depending on which pins are connected to one another by cable bridges 65, a characteristic pattern is also obtained here, which enables position coding.
The proposed electronic assembly eliminates a welded connector with longitudinal water seals for position recognition in the cable harness of a motor vehicle. In particular, an automatic production of the cable harness can be achieved. By evaluating the electrical connection of the pins of the module itself to one another, which is arranged on the cable bundle side, a simple position detection can be achieved. Here, an infinite number of positions can theoretically be defined depending on the number of position terminals and the number of cable bridges used.
List of reference numerals
10. Electronic component (sensor, actuator, controller)
11-13 external ground terminal
21. Internal ground wire terminal (Main ground wire)
22-23 internal ground wire terminal (coding ground wire)
30. First plug connector
31-34 first position terminal
35-38 protection circuit
40. Evaluation circuit
41-44 third position terminal
50. Cable bundle
51. Grounding wire
54. Ultrasonic welding connector
55. Main line
60. Second plug connector
61-64 second position terminal
65. And a cable bridge.

Claims (11)

1. An electronic assembly (10) with position coding for a motor vehicle, the electronic assembly comprising:
-a plurality of first position terminals (31-34) configured for connection with a corresponding plurality of respective second position terminals (61-64) arranged at a component-side end of a cable harness (50) of a motor vehicle; and
an evaluation circuit (40) coupled to the first position terminals (31-34), the evaluation circuit being configured to, when a connection is established between the plurality of first position terminals (31-34) and the plurality of corresponding second position terminals (61-64),
-determining a first or a second electrical connection state for each of the first position terminals (31-34), wherein the connection state of each of the first position terminals depends on: whether the second position terminals (61-64) of the cable bundle are connected to each other via a cable bridge (65) and which of the second position terminals are connected to each other via a cable bridge; and
-deducing the coding of the component (10) from the pattern of the first position terminals (31-34) with the first connection state or the second connection state.
2. The electronic assembly according to claim 1, wherein the plurality of first position terminals (31-34) are arranged in a first plug connector (30) of the assembly (10).
3. The electronic assembly according to claim 1 or 2, wherein the plurality of second position terminals (61-64) are arranged in a second plug connector (60) of the cable bundle (40) corresponding to the first plug connector (30).
4. An electronic assembly according to claim 3, characterized in that the first and second plug connectors (30, 60) comprise one or more terminals for data transmission and/or one or more terminals for supply potential in addition to the plurality of first position terminals (31-34) and the plurality of second position terminals (61-64), respectively.
5. The electronic assembly according to one of the preceding claims, wherein the plurality of first position terminals (31-34) and the respective second position terminals (61-64) is three or more.
6. Electronic assembly according to one of the preceding claims, characterized in that the exactly two second position terminals (61-64) are electrically connected to each other via respective ends of a cable bridge (65).
7. The electronic assembly according to claim 6, characterized in that the number of cable bridges (65) is one or more.
8. The electronic assembly according to claim 6 or 7, characterized in that the second position terminals (61-64) which are not connected to the ends of the cable bridge (65) do not have an electrical connection to the conductors.
9. Electronic assembly according to one of claims 6 to 8, characterized in that each end of the cable bridge (65) is connected with exactly two second position terminals (61-64) by means of a crimp connection.
10. The electronic assembly of any of the preceding claims, wherein the electronic assembly is configured to:
-a radar sensor;
-a lidar;
-a camera;
-an optical module;
-a seat module;
-a seat heating controller;
-a seat pneumatic module;
-a rear seat display;
-a wireless charging tray.
11. A motor vehicle having a plurality of assemblies constructed in accordance with any one of the preceding claims.
CN202211384790.9A 2021-12-10 2022-11-07 Electronic assembly with position coding for a motor vehicle Pending CN116259991A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102021132688.5A DE102021132688A1 (en) 2021-12-10 2021-12-10 Electronic component with position coding for a motor vehicle
DE102021132688.5 2021-12-10

Publications (1)

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CN116259991A true CN116259991A (en) 2023-06-13

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ID=86498189

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Application Number Title Priority Date Filing Date
CN202211384790.9A Pending CN116259991A (en) 2021-12-10 2022-11-07 Electronic assembly with position coding for a motor vehicle

Country Status (2)

Country Link
CN (1) CN116259991A (en)
DE (1) DE102021132688A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT292797B (en) 1967-07-18 1971-09-10 Itt Austria Monitoring circuit for plug-in modules in slide-in technology
DE2951851C2 (en) 1979-12-21 1982-09-09 Fr. Sauter AG, Fabrik elektr. Apparate, Basel Coding device with a plug-in socket and a coding plug
DE3713262A1 (en) 1987-04-18 1988-11-03 Heidelberger Druckmasch Ag CONNECTOR CODING FOR ELECTRICAL CABLES
DE19820691C2 (en) 1997-07-29 2002-02-07 Siemens Ag Plug part for a wiring harness of a motor vehicle
DE29816220U1 (en) 1997-09-09 1999-01-14 Siemens Ag Electrical assembly with a connector
DE102007028773A1 (en) 2007-06-22 2009-03-12 Volkswagen Ag Operating device for air-conditioning system of motor vehicle, has unit, which is available in motor vehicle, where operating device is operated in two operating modes

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