CN219715618U - Load assembly - Google Patents

Abstract

The utility model discloses a load assembly, comprising: the signal interface comprises a plurality of signal pins, and each signal pin is respectively used for being connected with a corresponding pin in a socket of the electronic controller; a load unit comprising a plurality of load components required for performance detection of the electronic controller; the switch unit is connected between the load unit and the signal interface and comprises a plurality of electric control switches, and each load piece is connected with a corresponding signal pin through at least one electric control switch; the micro control unit is connected with the switch unit and used for controlling the on-off of each electric control switch in the switch unit. By adopting the technical scheme, the signal interface, the load unit and the electric control switch connected between each load piece and each signal pin of the signal interface are arranged, so that the electric connection between each load piece and the ECU is controlled by the micro control unit, the load piece of the ECU can be automatically configured, the problems of complex manufacture and difficult operation of mechanical switching are solved, the operation is simple and convenient, and the operation error rate is reduced.

Description

Load assembly

Technical Field

The utility model relates to the technical field of automobile safety detection, in particular to a load assembly.

Background

With the improvement of the quality demands of people on automobiles, consumers have requirements on the appearance, the functions and the intelligent driving degree of the automobiles when purchasing the automobiles, and pay more attention to the safety performance of the automobiles.

The automobile safety airbag system, the engine system and the like are used as important components of an automobile and have larger safety association with the automobile, so that before the automobile leaves a factory, the electronic controller (ElectronicControlUnit, ECU) module in each system is required to be subjected to functional test so as to ensure that each control device can work normally in the running process of the automobile, thereby ensuring the safety of the automobile. The current ECU performance detection is to connect the ECU with various loads respectively directly through a mechanical switch, and then change the connection of the ECU with the loads by manually switching the mechanical switch. The method is complex and tedious to manufacture, and is high in operation difficulty and easy to make mistakes in the test process.

Disclosure of Invention

The utility model aims to solve the problems that in the prior art, an ECU is directly connected with various loads through a mechanical switch, the manufacturing is complex and tedious, the operation difficulty is high, and errors are easy to occur in the test process.

To solve the above technical problems, an embodiment of the present utility model discloses a load assembly for assisting performance detection of an electronic controller, the load assembly comprising:

the signal interface is used for being connected with the electronic controller and comprises a plurality of signal pins, and each signal pin is respectively used for being connected with a corresponding pin in a socket of the electronic controller;

a load unit comprising a plurality of load components required for performance detection of the electronic controller;

the switch unit is connected between the load unit and the signal interface and comprises a plurality of electric control switches, and each load piece is connected with a corresponding signal pin through at least one electric control switch;

the micro control unit is connected with the switch unit and used for controlling the on-off of each electric control switch in the switch unit.

Specifically, the signal interface is used for being detachably connected with the socket of the ECU, the signal interface and the ECU socket are respectively provided with a plurality of signal pins and pins which correspond to each other, and the communication connection between the ECU and each load piece is realized through the connection of the signal pins and the pins. By adopting the technical scheme, the signal interface, the load unit and the electric control switch connected between each load piece and each signal pin of the signal interface are arranged, so that the electric connection between each load piece and the ECU is controlled by the micro control unit, the load piece of the ECU can be automatically configured, the problems of complex manufacture and difficult operation of mechanical switching are solved, the operation is simple and convenient, and the operation error rate is reduced.

In some possible implementations, in the load assembly provided by the embodiments of the present utility model, the socket of the electronic controller further includes a type pin for characterizing a type of the electronic controller; the signal interface also comprises a detection pin, at least one detection pin is used for connecting the type pin; the load assembly further comprises a first detection unit connected with the micro-control unit and used for detecting whether the type pin is connected with the detection pin of the signal interface or not so as to judge whether the electronic controller connected with the signal interface is a target piece to be detected or not.

In some possible implementations, in the load assembly provided by the embodiment of the present utility model, the number of the detection pins is a plurality; the first detection unit includes:

the first multiplexer is connected with detection switches and detection resistors in series at the input ends of the first multiplexer, the detection switches are arranged corresponding to the detection pins, and when the detection pins are connected with the type pins, the detection switches corresponding to the detection pins are triggered;

the analog-to-digital converter is connected in series between the output end of the first multiplexer and the micro-control unit and is used for converting the analog signal received by the input end of the first multiplexer into a digital signal and outputting the digital signal to the micro-control unit so as to enable the micro-control unit to judge whether the electronic controller is a target piece to be detected.

In some possible implementations, in the load assembly provided by the embodiment of the present utility model, the load assembly further includes a second detection unit, which is respectively connected to the signal interface and the micro-control unit, and is configured to detect whether each signal pin in the signal interface is connected to a corresponding pin of the electronic controller.

In some possible implementations, in the load assembly provided by the embodiment of the present utility model, the second detection unit includes:

the input ends of the second multiplexer are respectively connected with the signal pins;

the impedance detection unit is connected in series between the output end of the second multiplexer and the micro-control unit and is used for detecting the ground impedance of each signal pin and transmitting the ground impedance to the micro-control unit so that the micro-control unit can judge whether each signal pin is connected with a corresponding pin of the electronic controller according to the output data of the impedance detection unit.

In some possible implementations, in the load assembly provided by the embodiment of the present utility model, the load assembly further includes an indication unit, where the indication unit includes a triode, a base electrode of the triode is connected to the micro-control unit through a resistor, a collector electrode of the triode is connected to a power supply terminal through a diode, and an emitter electrode of the triode is grounded.

In some possible implementations, in the load assembly provided by the embodiment of the present utility model, the number of signal interfaces is multiple.

In some possible implementations, in the load assembly provided by the embodiment of the present utility model, the switch unit is a matrix switch unit, which includes a plurality of electrically controlled switches arranged in a matrix.

In some possible implementations, in the load assembly provided by the embodiment of the present utility model, the load assembly further includes an upper computer or an operation screen, where the upper computer or the operation screen is used to set a configuration relationship between each pin of the electronic controller and each load element.

In some possible implementations, in the load assembly provided by the embodiment of the present utility model, a control circuit is further included and connected between the micro control unit and the switch unit.

Drawings

FIG. 1 is a block diagram of a load assembly according to one embodiment of the present utility model;

fig. 2 is a schematic structural diagram of a matrix switch unit according to an embodiment of the present utility model;

FIG. 3 is a diagram of a configuration interface of each load and signal interface according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a first detection unit according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a second detection unit according to an embodiment of the present utility model.

Detailed Description

Further advantages and effects of the present utility model will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present utility model with specific examples. While the description of the utility model will be presented in connection with a preferred embodiment, it is not intended that the utility model be limited to this embodiment. Rather, the purpose of the present application is to cover other alternatives or modifications, which may be extended by the claims based on the utility model. The following description contains many specific details for the purpose of providing a thorough understanding of the present utility model. The utility model may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the utility model. It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that, the orientation or positional relationship indicated by the terms "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is conventionally put in use of the product of the application, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element to be referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

The terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In the description of the present embodiment, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium; either mechanically or electrically. The specific meaning of the above terms in the present embodiment can be understood in a specific case by those of ordinary skill in the art.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, the present utility model provides a load assembly that may be used to assist an ECU in performance detection. Specifically, the load assembly includes a signal interface unit, a load unit 3, a switch unit 2, and a micro control unit 4. The load unit 3 comprises a plurality of load parts required by ECU performance detection, and the switch unit 2 is connected between the signal interface unit and the load unit 3 and is connected with the micro-control unit (MicroControlUnit, MCU) 4 and used for realizing on-off between each load part and the signal interface unit under the control of the micro-control unit 4.

The signal interface unit comprises at least one signal interface 1. Each signal interface 1 is detachably connected with a socket of the ECU. The ECU socket includes a plurality of pins, one or more of which may correspond to a load for transmitting received data signals of the respective load into the ECU. Specifically, each signal interface 1 may include a plurality of signal pins, the number of which is greater than or equal to the number of pins of the ECU socket, and at least part of the signal pins may connect respective load pieces in the load unit 3 and respective pins in the ECU socket, so that data signals of each load may be transmitted into the ECU through links formed by the respective signal pins and pins.

Further, the switch unit 2 includes a plurality of electric control switches, and each load piece in the load unit 3 is connected with a corresponding signal pin through at least one electric control switch, so that the micro control unit 4 can switch the connection relation between each load piece and the ECU by controlling the on-off of each electric control switch, so as to meet the load configuration of the ECU. The scheme can reduce the manufacturing and labor cost and is simple and convenient to operate.

Specifically, the load piece comprises a power supply, a CAN communication module, a K communication module, an airbag, a safety belt, an indicator light, a sensor and the like. The switch unit 2 may be a matrix switch unit, which includes electric switches (such as relays) arranged in a matrix, and each electric switch is electrically connected to a corresponding load element and a signal pin. Fig. 2 shows a structure of a matrix switch unit, as shown in fig. 2, ai, bi, ci … … are electric control switches (i=1, 2,3 … …), load_ld, load_zpl, load_zph and the like are LOAD elements, acu_pin1, acu_pin2, acu_pin3 … … are signal interfaces 1 (ACU refers to an electronic controller of an airbag system), each LOAD element corresponds to a row, each signal interface 1 corresponds to a column, each electric control switch is distributed in a matrix, the same signal interface 1 can be electrically connected with each LOAD element through a row of electric control switches, and the same LOAD element can also be electrically connected with each signal interface 1 through a column of electric control switches.

By adopting the design of the matrix type switch unit, the connection and the switching between each signal pin and any load in the ECU signal interface 1 can be satisfied, and the structure is simple, the manufacturing is easier, and the manufacturing cost can be reduced.

With continued reference to fig. 1, the load assembly may further include a host computer 5 and an operation screen 6 (such as a capacitive touch screen) for setting the configuration relationship between each pin of the ECU and each load. The connection relation between each load and the ECU may be configured, for example, by a capacitive touch screen to generate a configuration file, and the configuration file is loaded to the micro control unit 4. Or the connection relation between each load and the ECU can be directly configured through the upper computer 5, and then the upper computer 5 loads the configuration file to the micro control unit 4. As shown in fig. 3, acu_pin1, acu_pin2 and acu_pin3 … … represent signal pins in the signal interface 1, IGN, GND, IASG … … represent load element connection ends, and when acu_pin1 is in a selected state and acu_pin1 is selected to be configured as an IASG, only A3 is closed in line a in fig. 2, and the rest of the switches are all opened. Similarly, acu_pin1 can achieve any load matching.

According to the scheme, the interfaces of any ECU can be freely matched with the load, the function of expanding and modifying the load configuration according to the requirements at any time is realized, the applicability is higher, and the time and the cost can be saved.

Further, a control circuit 8 is connected in series between the micro control unit 4 and the switch unit 2, and the micro control unit 4 controls the switch unit 2 through the control circuit 8 to realize automatic control and switching of signal connection between the load and the signal interface 1.

Illustratively, the ECU socket further includes a type pin (the number of type pins may be 1 or more) for characterizing the type of ECU; the signal interface 1 further comprises at least one detection pin for connecting the type pins, each detection pin being adapted to one type pin, respectively.

In general, the harness sockets of the ECUs of different items are also different, for example, the positions or the number of the type pins in the sockets of the ECUs of different items are different, and thus it is possible to determine which item of ECU the ECU connected to the signal interface 1 is by providing a plurality of detection pins different in position in the signal interface 1.

Specifically, as shown in fig. 1, in one embodiment of the present utility model, the load assembly further includes a first detection unit 71 connected to the micro control unit 4, for detecting whether the type pin is connected to the detection pin of the signal interface 1 to determine whether the electronic controller connected to the signal interface 1 is a target object to be tested.

That is, the signal interface 1 may include one or more detection pins, and the position at which at least one detection pin exists corresponds to the position of the type pin in the ECU of the object to be measured, so that whether the ECU is the object to be measured can be judged by detecting whether the detection pin is connected to the corresponding type pin by the first detection unit 71.

Specifically, as shown in fig. 4, the first detection unit 71 includes a first multiplexer 711 and an analog-to-digital converter 712. Wherein, each input end of the first multiplexer 711 is connected with the power supply end through a detection switch and a detection resistor respectively; the analog-to-digital converter 712 is connected in series between the output terminal of the first multiplexer 711 and the micro control unit 4, and is configured to convert the analog signal received by the input terminal of the first multiplexer 711 into a digital signal and output the digital signal to the micro control unit 4. Specifically, the detection switch may be a micro switch, and is set corresponding to each detection pin, and when the detection pin is connected with the type pin of the ECU, the micro switch may be triggered, so that the first multiplexer detects the state change thereof.

Fig. 4 shows a schematic circuit configuration of the first detection unit 71, and as shown in fig. 4, the first detection unit 71 has 4 groups of detection switches (T1, T2, T3, and T4, respectively) and detection resistors (R1, R2, R3, and R4, respectively), each group of detection switches being connected to one input terminal of the first multiplexer 711 through the detection resistor. When the wire harness sockets of different ECUs are plugged into the signal interface 1, the states of the detection switches are changed, and the analog-to-digital converter 712 detects whether the states of the detection switches are matched with the content of the configuration file through the first multiplexer 711, so that whether the connected ECU is correct is judged. For example, when the ECU socket is plugged into the signal interface 1, if the detection switches T1, T2 and T4 are triggered, the input ends of the first multiplexer connected with the detection resistors R1, R2 and R4 will receive corresponding analog signals, and then the analog signals are transmitted to the analog-to-digital converter 712 through the output end and converted into digital signals 1101 and then transmitted to the micro-control unit 4, if the configuration relation in the configuration file generated by the micro-control unit 4 is 1111, the detection results are not matched, and the micro-control unit 4 can control early warning to remind operators.

The first detection unit 71 shown in fig. 4 has 4 sets of detection switches, and thus 2^4, i.e., 16 types (or items) of ECU can be adapted. It should be noted that the number of the detection pins in the signal interface 1 and the number of the detection switches and the detection resistors in the first detection unit 71 are not limited, and may be set according to practical situations (such as the number of items to be adapted).

With continued reference to fig. 1, in an embodiment of the present utility model, the load assembly further includes a second detecting unit 72 connected to the signal interface 1 and the micro control unit 4, respectively, for detecting whether each signal pin in the signal interface 1 is connected to a corresponding pin of the electronic controller.

Specifically, as shown in fig. 5, the second detection unit 72 includes a second multiplexer 721 and an impedance detection unit 722. Wherein, each input end of the second multiplexer 721 is connected to each signal pin of the signal interface 1; the impedance detection unit 722 is connected in series between the output end of the second multiplexer 721 and the micro control unit 4, and is configured to detect the ground impedance of each signal pin and transmit the ground impedance to the micro control unit 4, so that the micro control unit 4 determines whether each signal pin is connected to a corresponding pin of the electronic controller according to the output data of the impedance detection unit 722.

Further, when the number of signal interfaces 1 is plural, each signal pin of each signal interface 1 is connected to the input end of a second multiplexer 721. During detection, the impedance detection unit 722 sequentially inputs a sine wave small signal to all the signal interfaces 1 through the second multiplexer 721, and the change of parameters such as amplitude, phase and the like of the sine wave received at the ground can obtain the ground impedance of each signal interface 1 through calculation. When the detected impedance value does not match the selected configuration file, not only can the error of the ECU connected at the moment be judged, but also an error report can be output, so that the problem of the ECU can be quickly determined.

In one embodiment of the present utility model, the first detection unit 71 and the second detection unit 72 may be included at the same time, and these two detection units form the error-proofing early warning module 7, and the detection units will automatically identify the information of the currently connected ECU and determine whether the information matches with the selected configuration information, and only if the results of the two detection units (i.e. the first detection unit 71 and the second detection unit 72) are diagnosed as valid at the same time, the matrix switch unit is automatically turned on according to the corresponding load configuration information, so as to realize rapid switching of the load, otherwise, early warning is performed. The error-proofing early warning module 7 can effectively avoid quality problems caused by load configuration errors and damages.

As shown in fig. 4 and 5, the load assembly may further include an indication unit 73. Specifically, the indicating unit 73 includes a transistor Q1, a base electrode of the transistor Q1 is connected to the micro-control unit 4 through a resistor R5, a collector electrode of the transistor Q1 is connected to a power source terminal through a current limiting resistor R6 and a diode D1, and an emitter electrode of the transistor Q1 is grounded.

Specifically, the diode D1 is a light emitting diode, which mainly plays a role in prompting. When the first detection unit 71 and/or the second detection unit 72 detect a configuration error (for example, the currently connected ECU is not the object to be tested or the corresponding pins of each signal pin and the electronic controller connected with the signal pin are not matched), the micro control unit controls the transistor Q1 to be turned on, so that the diode D1 emits light, thereby reminding a worker to check.

The load assembly provided by the utility model is suitable for matching between the ECU and the load part thereof, and can be used for assisting the ECU in functional verification and performance analysis. The device meets the matching switching between any ECU and load through the design of a matrix switch; the design of the error-proof early warning module can ensure the correctness of the matching of the ECU and the load thereof. And adding and modifying the configuration relation between the ECU and the load through the operation screen 6 or the upper computer 5 to form a configuration file, and automatically switching the corresponding load configuration by the matrix switch when the selected configuration file is consistent with the detection result of the error-proofing early-warning module. And when the matching is inconsistent, the matrix switch is closed, and early warning is carried out, so that the quality problem caused by load configuration errors and damage is effectively avoided. In addition, the utility model can also output error report when the matching is inconsistent, thereby being convenient for quickly determining the problem of the ECU.

The load assembly has the advantages of integration, automation and expansibility, can meet the load configuration of different ECUs, reduces the manufacturing and labor costs, can realize the rapid switching between each electronic control unit and the load through automatic detection and control, automatically detects and diagnoses the connection state of the electronic control units and the load, realizes the arbitrary increase and modification of the load configuration, and can customize a corresponding load control box according to the demands of customers, thereby having higher applicability and saving time and cost.

While the utility model has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the utility model with reference to specific embodiments, and it is not intended to limit the practice of the utility model to those descriptions. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present utility model.

Claims (10)

1. A load assembly for assisting performance detection of an electronic controller, comprising:

the signal interface is used for connecting the electronic controller and comprises a plurality of signal pins, and each signal pin is respectively used for connecting corresponding pins in a socket of the electronic controller;

a load unit comprising a plurality of load pieces required for performance detection of the electronic controller;

the switch unit is connected between the load unit and the signal interface and comprises a plurality of electric control switches, and each load piece is connected with the corresponding signal pin through at least one electric control switch;

the micro control unit is connected with the switch unit and used for controlling the on-off of each electric control switch in the switch unit.

2. The load assembly of claim 1, wherein the socket of the electronic controller further comprises a type pin for characterizing a type of the electronic controller; the signal interface also comprises a detection pin, and at least one detection pin is used for connecting the type pin; the load assembly further comprises a first detection unit connected with the micro-control unit and used for detecting whether the type pin is connected with the detection pin of the signal interface or not so as to judge whether the electronic controller connected with the signal interface is a target piece to be detected or not.

3. The load assembly of claim 2, wherein the number of sense pins is a plurality; the first detection unit includes:

each input end of the first multiplexer is connected with a detection switch and a detection resistor in series, each detection switch is arranged corresponding to each detection pin, and when the detection pins are connected with the type pins, the detection switches corresponding to the detection pins are triggered;

the analog-to-digital converter is connected in series between the output end of the first multiplexer and the micro-control unit and is used for converting the analog signal received by the input end of the first multiplexer into a digital signal and outputting the digital signal to the micro-control unit so that the micro-control unit can judge whether the electronic controller is the target piece to be detected.

4. The load assembly of claim 1, further comprising a second detection unit, coupled to the signal interface and the micro-control unit, respectively, for detecting whether each of the signal pins in the signal interface is coupled to a corresponding pin of the electronic controller.

5. The load assembly of claim 4, wherein the second detection unit comprises:

the input ends of the second multiplexer are respectively connected with the signal pins;

the impedance detection unit is connected in series between the output end of the second multiplexer and the micro control unit and is used for detecting the ground impedance of each signal pin and transmitting the ground impedance to the micro control unit so that the micro control unit can judge whether each signal pin is connected with a corresponding pin of the electronic controller according to the output data of the impedance detection unit.

6. The load assembly of any one of claims 2 to 5, further comprising an indication unit comprising a transistor, a base of the transistor being connected to the micro-control unit via a resistor, a collector of the transistor being connected to a power supply terminal via a diode, and an emitter of the transistor being grounded.

7. The load assembly of claim 1, wherein the number of signal interfaces is a plurality.

8. The load assembly of claim 1 wherein the switching unit is a matrix switching unit comprising a plurality of the electrically controlled switches arranged in a matrix.

9. The load assembly of claim 1, further comprising a host computer or an operation screen for setting a configuration relationship between each pin of the electronic controller and each load member.

10. The load assembly of claim 1, further comprising a control circuit coupled between the micro-control unit and the switching unit.