Wire harness connection detection circuit and test tool

Abstract

The utility model provides a wire harness connection detection circuit and a test tooling, the wire harness connection detection circuit comprises a signal detection circuit and a detection indication circuit, the signal detection circuit is electrically connected with a domain controller through a plurality of detection ends, and the input end of the detection indication circuit is connected with the output end of the signal detection circuit; the signal detection circuit is used for accessing a connection signal output by the domain controller through a plurality of detection ends, detecting a wire harness connection state of the domain controller according to the connection signal, and outputting a connection detection signal according to the wire harness connection state of the domain controller; the detection indication circuit is used for carrying out information prompt according to the connection detection signal. According to the utility model, the plurality of wire harnesses are detected through the logic chip, so that the convenience of detecting the wire harness connection state of the domain controller is improved, and the problem that technicians spend a lot of energy to repeatedly check the wire harnesses and the driving board is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of detection circuits, and particularly relates to a wire harness connection detection circuit and a test tooling. Background Art

[0002] The existing domain controllers have high integration and rich functions, resulting in an increase in the number of loads connected to the domain controllers. The domain controllers in the domain controllers need to access multiple drive chips and multiple acquisition signals of multiple digital circuits, resulting in an increase in the wire harnesses of the domain controllers. The increase in wire harnesses is prone to fault problems such as incorrect wire harness connection and poor wire harness contact. On the other hand, the number of control pins of the single-chip microcomputer increases, and configuration errors are prone to occur during software configuration. Technicians need to spend a lot of energy repeatedly checking wire harness problems and drive board problems, resulting in an increase in the workload of technicians and a delay in the project progress. Content of the Utility Model

[0003] The main object of the utility model is to propose a wire harness connection detection circuit and a test tooling, aiming to improve the convenience of detecting the connection state of the wire harness.

[0004] The utility model proposes a wire harness connection detection circuit, which includes: a signal detection circuit having multiple detection terminals; the signal detection circuit is used to receive the connection signals output by the domain controller through the multiple detection terminals; the signal detection circuit is used to detect the wire harness connection state of the domain controller according to the connection signals and output connection detection signals; a detection indication circuit, the input end of the detection indication circuit is connected to the output end of the signal detection circuit; the detection indication circuit is used to output corresponding detection information according to the connection detection signals.

[0005] Optionally, the signal detection circuit includes: a logic circuit; the logic circuit has multiple detection terminals, the logic circuit is electrically connected to the domain controller through the multiple detection terminals, and the output end of the logic circuit is connected to the input end of the detection indication circuit.

[0006] Optionally, the logic circuit includes: multiple AND gate circuits; the AND gate circuits have multiple detection terminals, the AND gate circuits are electrically connected to the domain controller through the multiple detection terminals, and the output ends of the AND gate circuits are connected to the input end of the detection indication circuit.

[0007] Optionally, the multiple AND gate circuits are integrated in the same chip.

[0008] Optionally, the detection indication circuit at least includes any one of the following: a sound indication circuit; a display indication circuit.

[0009] Optionally, the detection indication circuit includes: an LED lamp; an LED driving circuit, an input end of the LED driving circuit is connected to an output end of the signal detection circuit, and an output end of the LED driving circuit is connected to an input end of the LED lamp; the LED driving circuit is configured to drive the LED lamp to work according to the connection detection signal.

[0010] Optionally, the LED driving circuit includes: a switch circuit, a controlled end of the switch circuit is connected to an output end of the detection indication circuit, an input end of the switch circuit is connected to an output end of the LED lamp, and an output end of the switch circuit is configured to be connected to a ground terminal; the switch circuit is configured to conduct or cut off a path between a power supply terminal and the LED lamp according to the connection detection signal.

[0011] Optionally, the detection indication circuit includes a plurality of detection indication branches.

[0012] The present utility model further provides a test tooling, the test tooling includes a domain controller and a wire harness connection detection circuit as described above.

[0013] The present utility model provides a wire harness connection detection circuit and a test tooling. The wire harness connection detection circuit includes: a signal detection circuit and a detection indication circuit. The signal detection circuit is electrically connected to a domain controller through a plurality of detection terminals, and an input end of the detection indication circuit is connected to an output end of the signal detection circuit. In practical applications, the signal detection circuit is configured to access a connection signal output by the domain controller through a plurality of detection terminals, detect the wire harness connection state of the domain controller according to the connection signal, and output a connection detection signal according to the wire harness connection state of the domain controller; the detection indication circuit is configured to perform information prompting according to the connection detection signal. The present utility model collects the connection signal output by the domain controller through a logic chip, detects the wire harness connection state of the domain controller according to the connection signal, and performs prompting according to the connection state, improving the convenience of detecting the wire harness connection state of the domain controller and avoiding the problem that technicians spend a lot of energy repeatedly troubleshooting the wire harness and the driving board. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0015] Figure 1 It is a circuit flow chart of the wire harness connection test circuit of the present utility model;

[0016] Figure 2It is a circuit flowchart of another embodiment of the wire harness connection test circuit of the present utility model;

[0017] Figure 3 It is a circuit flowchart of another embodiment of the wire harness connection test circuit of the present utility model;

[0018] Figure 4 It is a circuit structure diagram of the wire harness connection test circuit of the present utility model.

[0019] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0021] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0022] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, or solution B, or a solution that satisfies both A and B at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0023] It is understandable that the high integration and rich functions of existing domain controllers have led to an increase in the number of loads connected to the domain controllers. The domain controllers in the domain controllers need to access multiple drive chips and multiple acquisition signals of multiple digital circuits, resulting in an increase in the wiring harnesses of the domain controllers. The increase in wiring harnesses is prone to failure problems such as incorrect wiring and poor contact of the wiring harnesses. On the other hand, the number of control pins of the single-chip microcomputer increases, and configuration errors are prone to occur during software configuration. Technicians need to spend a lot of energy to check the wiring harness problems through methods such as wiring harness plugging and unplugging or feedback from the drive board, resulting in an increase in the workload of technicians and a delay in the project progress.

[0024] The present utility model provides a wiring harness connection detection circuit, referring to Figure 1 , the wiring harness connection detection circuit includes:

[0025] A signal detection circuit 10, the signal detection circuit 10 has a plurality of detection terminals; the signal detection circuit 10 is used to receive connection signals output by the domain controller through the plurality of detection terminals;

[0026] The signal detection circuit 10 is used to detect the wiring harness connection state of the domain controller according to the connection signal and output a connection detection signal;

[0027] A detection indication circuit 20, an input end of the detection indication circuit 20 is connected to an output end of the signal detection circuit 10; the detection indication circuit 20 is used to output corresponding detection information according to the connection detection signal.

[0028] In order to improve the convenience of detecting the wiring harness connection state, the present utility model provides a wiring harness connection detection circuit. The logic chip U1 is used to collect a plurality of connection signals output by the domain controller, detect the wiring harness connection state of the domain controller according to the plurality of connection signals, and trigger the detection indication circuit 20 to perform information prompting according to the wiring harness connection state of the domain controller. The present utility model detects problems such as incorrect wiring, missing wiring, and poor contact of the wiring harness of the domain controller through the logic chip U1, improves the convenience of detecting the wiring harness connection state of the domain controller, and avoids technicians spending a lot of energy to check each wiring harness of the domain controller one by one.

[0029] In this embodiment, the domain controller is used to connect multiple wire harnesses and output connection signals corresponding to the connection states of the multiple wire harnesses through multiple output terminals. Multiple detection terminals of the signal detection circuit 10 are connected to the multiple output terminals of the domain controller one by one. The signal detection circuit 10 receives the multiple connection signals output by the domain controller through the multiple detection terminals, determines the connection state of the wire harness according to the level signal corresponding to each connection signal, and then outputs a corresponding connection detection signal according to the connection state of the wire harness. Among them, each connection signal corresponds to a high-level signal / low-level signal; the connection detection signal corresponds to a high-level signal / low-level signal. The detection indication circuit 20 gives an information prompt according to the level signal corresponding to the connection detection signal. In this embodiment, the detection indication circuit 20 can be implemented by a sound indication circuit, a display indication circuit or other indication circuits. For example, when the detection indication circuit 20 is implemented by a sound indication circuit, the sound indication circuit gives a sound prompt according to the level signal corresponding to the connection detection signal. Technical personnel can judge the connection state of the wire harness of the domain controller according to the sound prompt and check the wire harness with abnormal domain controller. In addition, in this embodiment, the existing specific IC is replaced with a logic chip U1 to collect and detect the connection signals of the wire harness of the domain controller, and the circuit structure is simpler and the design cost is lower.

[0030] In practical applications, referring to Figure 4 , the domain controller is usually connected to multiple wire harnesses, and there is a one-to-one correspondence between the domain controller and the wire harnesses. If the wiring between each wire harness and the domain controller is correct, the signal detection circuit 10 controls the detection indication circuit 20 to give a prompt that the wiring is correct; if the wiring between any wire harness and the domain controller is incorrect, the signal detection circuit 10 controls the detection indication circuit 20 to give a prompt that the wiring is incorrect. Technical personnel only need to check the corresponding wire harness through the prompt of the detection indication circuit 20, thereby improving the efficiency of detecting the connection of the wire harness.

[0031] Specifically, taking the domain controller connected to the first wire harness, the second wire harness, the third wire harness, the fourth wire harness, the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness respectively, and the signal detection circuit 10 including the first AND gate circuit and the second AND gate circuit as an example for elaboration. Among them, the first AND gate circuit has a first detection terminal 1A, a second detection terminal 1B, a third detection terminal 1C, and a fourth detection terminal 1D; the second AND gate circuit has a first detection terminal 2A, a second detection terminal 2B, a third detection terminal 2C, and a fourth detection terminal 2D. The first AND gate circuit accesses the connection signals of the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness through the first detection terminal 1A, the second detection terminal 1B, the third detection terminal 1C, and the fourth detection terminal 1D respectively; the second AND gate circuit accesses the connection signals of the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness through the first detection terminal 2A, the second detection terminal 2B, the third detection terminal 2C, and the fourth detection terminal 2D respectively. The connection signal of the first wire harness is DO1, the connection signal of the second wire harness is DO2, the connection signal of the third wire harness is DO3, the connection signal of the fourth wire harness is DO4, the connection signal of the fifth wire harness is DO5, the connection signal of the sixth wire harness is DO6, the connection signal of the seventh wire harness is DO7, and the connection signal of the eighth wire harness is DO8.

[0032] Specifically, when DO1, DO2, DO3, and DO4 are all high-level signals, the first AND gate circuit confirms that the connection states of the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness are all normal states, that is, the first MOS transistor Q1 is controlled to conduct the path between the first LED D1 and the ground terminal through the output terminal 1Y, so that the first LED D1 emits light; when any one or more of DO1, DO2, DO3, and DO4 are low-level signals, the first AND gate circuit confirms that the connection states of the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness are all abnormal states, that is, the first MOS transistor Q1 is controlled to disconnect the path between the first LED D1 and the ground terminal through the output terminal 1Y, so that the first LED D1 does not emit light. When DO5, DO6, DO7, and DO8 are all high-level signals, the second AND gate circuit confirms that the connection states of the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness are all normal states, that is, the second MOS transistor Q2 is controlled to conduct the path between the second LED D2 and the ground terminal through the output terminal 2Y, so that the second LED D2 emits light; when any one or more of DO5, DO6, DO7, and DO8 are low-level signals, the second AND gate circuit confirms that the connection states of the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness are all abnormal states, that is, the second MOS transistor Q2 is controlled to disconnect the path between the second LED D2 and the ground terminal through the output terminal 2Y, so that the second LED D2 does not emit light. With such a setting, technicians only need to detect the working conditions of the first LED D1 and the second LED D2 to troubleshoot the wire harnesses corresponding to the first LED D1 and the second LED, improving the efficiency of detecting the connection of the wire harnesses.

[0033] The utility model provides a harness connection detection circuit, which includes a signal detection circuit 10 and a detection indication circuit 20. The signal detection circuit 10 is electrically connected to a domain controller through a plurality of detection terminals, and the input end of the detection indication circuit 20 is connected to the output end of the signal detection circuit 10. In practical applications, the signal detection circuit 10 is used to access the connection signals output by the domain controller through a plurality of detection terminals, detect the harness connection state of the domain controller according to the connection signals, and output connection detection signals according to the harness connection state of the domain controller. The detection indication circuit 20 is used to give information prompts according to the connection detection signals. The utility model collects the connection signals output by the domain controller through a logic chip U1, detects the harness connection state of the domain controller according to the connection signals, and gives prompts according to the connection state, improving the convenience of detecting the harness connection state of the domain controller and avoiding the problem that technicians spend a lot of energy repeatedly checking the harness and the drive board.

[0034] In an embodiment, referring to Figure 2 , the signal detection circuit 10 includes:

[0035] A logic circuit 110;

[0036] The logic circuit 110 has a plurality of detection terminals. The logic circuit 110 is electrically connected to the domain controller through the plurality of detection terminals, and the output end of the logic circuit 110 is connected to the input end of the detection indication circuit 20.

[0037] In this embodiment, the signal detection circuit 10 is implemented by a logic circuit 110, and the logic circuit 110 has a plurality of detection terminals. The plurality of detection terminals of the logic circuit 110 are connected to the plurality of output terminals of the domain controller one by one. The logic circuit 110 accesses the plurality of connection signals of the domain controller through the plurality of detection terminals, judges the harness connection state of the domain controller according to the level signals corresponding to each connection signal, and then outputs corresponding connection detection signals according to the harness connection state of the domain controller.

[0038] In an embodiment, referring to Figure 3 , the logic circuit 110 includes:

[0039] A plurality of AND gate circuits;

[0040] The AND gate circuit has a plurality of detection terminals. The AND gate circuit is electrically connected to the domain controller through the plurality of detection terminals, and the output end of the AND gate circuit is connected to the input end of the detection indication circuit 20.

[0041] In this embodiment, referring to Figure 4, taking the connection of the domain controller to the first wire harness, the second wire harness, the third wire harness, the fourth wire harness, the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness respectively, and the logic circuit 110 including the first AND gate circuit and the second AND gate circuit as an example for illustration. Among them, the first AND gate circuit has a first detection terminal 1A, a second detection terminal 1B, a third detection terminal 1C, and a fourth detection terminal 1D; the second AND gate circuit has a first detection terminal 2A, a second detection terminal 2B, a third detection terminal 2C, and a fourth detection terminal 2D. The first AND gate circuit accesses the connection signals of the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness through the first detection terminal 1A, the second detection terminal 1B, the third detection terminal 1C, and the fourth detection terminal 1D respectively; the second AND gate circuit accesses the connection signals of the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness through the first detection terminal 2A, the second detection terminal 2B, the third detection terminal 2C, and the fourth detection terminal 2D respectively. Refer to Figure 4 , the connection signal of the first wire harness is DO1, the connection signal of the second wire harness is DO2, the connection signal of the third wire harness is DO3, the connection signal of the fourth wire harness is DO4, the connection signal of the fifth wire harness is DO5, the connection signal of the sixth wire harness is DO6, the connection signal of the seventh wire harness is DO7, and the connection signal of the eighth wire harness is DO8.

[0042] In practical applications, when the first AND gate circuit detects that the connection signals of the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness are all high-level signals, it confirms that the connection states of the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness are all normal states, and the first AND gate circuit controls the detection indication circuit 20 to issue an information indication; similarly, when the second AND gate circuit detects that the connection signals of the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness are all high-level signals, it confirms that the connection states of the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness are all normal states, and the second AND gate circuit controls the detection indication circuit 20 to issue an information indication.

[0043] It should be understood that, refer to Figure 4, when one or more of the connection signals in the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness are low-level signals, the first AND gate circuit confirms that the connection status of the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness is an abnormal state, and the first AND gate circuit controls the detection indication circuit 20 to send out an information indication, and the technician conducts a check on the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness according to the information indication; similarly, when one or more of the connection signals in the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness are low-level signals, the second AND gate circuit confirms that the connection status of the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness is an abnormal state, and the second AND gate circuit controls the detection indication circuit 20 to send out an information indication, and the technician conducts a check on the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness according to the information indication. With such a setting, the convenience of detecting the connection status of the wire harness of the domain controller is improved, and it is avoided that the technician spends a lot of energy repeatedly checking the problems of the wire harness and the drive board.

[0044] In one embodiment, a plurality of the AND gate circuits are integrated in the same chip.

[0045] It can be understood that, in this embodiment, the logic circuit 110 includes a plurality of AND gate circuits, and the plurality of AND gate circuits are integrated in the same logic chip U1. In practical applications, the logic chip U1 is used to collect a plurality of connection signals output by the domain controller, and the connection status of multiple wire harnesses is detected according to the plurality of connection signals, which improves the convenience of detecting the connection status of the wire harness of the domain controller.

[0046] In one embodiment, the detection indication circuit 20 includes at least any one of the following:

[0047] A sound indication circuit;

[0048] A display indication circuit.

[0049] It can be understood that when the detection indication circuit 20 is a sound indication circuit, the sound indication circuit can be specifically implemented by a speaker. For example, when the AND gate circuit detects that the connections of multiple wire harnesses are normal, it controls the speaker to emit a prompt sound indicating that the wire harness connections are normal; when the AND gate circuit detects that the connections of multiple wire harnesses are abnormal, it controls the speaker to emit a prompt sound indicating that the wire harness connections are abnormal. When the detection indication circuit 20 is a display indication circuit, the display indication circuit can be specifically implemented by a display screen. For example, when the AND gate circuit detects that the connections of multiple wire harnesses are normal, it controls the display screen to display an image indicating that the wire harness connections are normal; when the AND gate circuit detects that the connections of multiple wire harnesses are abnormal, it controls the display screen to display an image indicating that the wire harness connections are abnormal.

[0050] In one embodiment, referring to Figure 4 , the detection indication circuit 20 includes:

[0051] An LED lamp;

[0052] An LED driving circuit, the input end of the LED driving circuit is connected to the output end of the signal detection circuit 10, and the output end of the LED driving circuit is connected to the input end of the LED lamp; the LED driving circuit is configured to drive the LED lamp to work according to the connection detection signal.

[0053] It can be understood that, in this embodiment, the detection and indication circuit 20 is implemented by an indicator lamp circuit, and the indicator lamp circuit specifically includes an LED lamp and an LED driving circuit. In practical applications, when the AND gate circuit detects that multiple wire harnesses are normally connected, the AND gate circuit outputs a control signal to the LED driving circuit to cause the LED driving circuit to control the LED lamp to emit light; when the AND gate circuit detects that multiple wire harnesses are abnormally connected, the AND gate circuit outputs a control signal to the LED driving circuit to cause the LED driving circuit to control the LED lamp not to emit light. Among them, the control signal mentioned above is a high-level signal / low-level signal.

[0054] In one embodiment, the LED driving circuit includes:

[0055] A switching circuit

[0056] The controlled end of the switching circuit is connected to the output end of the detection and indication circuit 20, the input end of the switching circuit is connected to the output end of the LED lamp, and the output end of the switching circuit is used to connect to the ground terminal; the switching circuit is configured to conduct or cut off the path between the power supply terminal and the LED lamp according to the connection detection signal.

[0057] It can be understood that, in this embodiment, referring to Figure 4 , the switching circuit is implemented by a MOS transistor. In practical applications, when the AND gate circuit detects that multiple wire harnesses are normally connected, the AND gate circuit controls the MOS transistor to conduct the path between the LED lamp and the ground terminal, so that a loop is formed among the power supply terminal, the LED lamp, and the ground terminal, and the LED lamp emits light; when the AND gate circuit detects that multiple wire harnesses are abnormally connected, the AND gate circuit controls the MOS transistor to disconnect the path between the LED lamp and the ground terminal, so that a loop cannot be formed among the power supply terminal, the LED lamp, and the ground terminal, and the LED lamp does not emit light.

[0058] In one embodiment, referring to Figure 3 , the detection and indication circuit 20 includes a plurality of detection and indication branches.

[0059] It can be understood that in this embodiment, taking the connection signal of the first wire harness as DO1, the connection signal of the second wire harness as DO2, the connection signal of the third wire harness as DO3, the connection signal of the fourth wire harness as DO4, the connection signal of the fifth wire harness as DO5, the connection signal of the sixth wire harness as DO6, the connection signal of the seventh wire harness as DO7, the connection signal of the eighth wire harness as DO8, the logic circuit 110 including the first AND gate circuit and the second AND gate circuit, and the detection and indication branch including the first detection and indication branch and the second detection and indication branch as examples for elaboration. Among them, the first detection and indication branch specifically includes the first LED lamp D1 and the first MOS transistor Q1; the second detection and indication branch specifically includes the second LED lamp D2 and the second MOS transistor Q2.

[0060] In practical applications, referring to Figure 4 , when DO1, DO2, DO3, and DO4 are all high-level signals, the first AND gate circuit confirms that the connection states of the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness are all normal states, that is, controls the first MOS transistor Q1 to conduct the path between the first LED lamp D1 and the ground terminal, so that the first LED lamp D1 emits light; similarly, when DO5, DO6, DO7, and DO8 are all high-level signals, the second AND gate circuit confirms that the connection states of the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness are all normal states, that is, controls the second MOS transistor Q2 to conduct the path between the second LED lamp D2 and the ground terminal, so that the second LED lamp D2 emits light.

[0061] It should be understood that when any one or more of DO1, DO2, DO3, and DO4 are low-level signals, the first AND gate circuit confirms that the connection states of the first wire harness, the second wire harness, the third wire harness, and the fourth wire harness are all abnormal states, that is, controls the first MOS transistor Q1 to disconnect the path between the first LED lamp D1 and the ground terminal, so that the first LED lamp D1 does not emit light; similarly, when any one or more of DO5, DO6, DO7, and DO8 are low-level signals, the second gate circuit confirms that the connection states of the fifth wire harness, the sixth wire harness, the seventh wire harness, and the eighth wire harness are all abnormal states, that is, controls the second MOS transistor Q2 to disconnect the path between the second LED lamp D2 and the ground terminal, so that the second LED lamp D2 does not emit light.

[0062] The present utility model also proposes a test tooling, including a domain controller and a wire harness connection detection circuit as described above.

[0063] It can be understood that the high integration degree of the existing domain controller leads to an increase in the wiring harness of the domain controller, and the increase in the wiring harness is prone to failure problems such as incorrect wiring and poor contact of the wiring harness. To address the above problems, the existing method is to use the plug-and-play method to check multiple wiring harnesses one by one, resulting in a large amount of detection work and low detection efficiency. The present utility model proposes a test tooling, which includes a domain controller and a wiring harness connection detection circuit, and the multiple wiring harnesses are synchronously detected through the wiring harness connection detection circuit, improving the efficiency and convenience of wiring harness detection.

[0064] The above embodiments are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A wiring harness connection detection circuit, characterized in that: The wiring harness connection detection circuit comprises: A signal detection circuit, wherein the signal detection circuit has a plurality of detection terminals; the signal detection circuit is used to receive a connection signal output by a domain controller through the plurality of detection terminals; The signal detection circuit is used to detect the wiring harness connection state of the domain controller according to the connection signal and output a connection detection signal; A detection indication circuit, wherein the input end of the detection indication circuit is connected to the output end of the signal detection circuit; the detection indication circuit is used to output corresponding detection information according to the connection detection signal.

2. The wiring harness connection detection circuit according to claim 1, characterized in that: The signal detection circuit comprises: Logic circuits; The logic circuit has a plurality of detection terminals, the logic circuit is electrically connected to the domain controller via the plurality of detection terminals, and the output terminal of the logic circuit is connected to the input terminal of the detection indication circuit.

3. The wiring harness connection detection circuit according to claim 2, characterized in that: The logic circuit comprises: Multiple AND gate circuits; The AND gate circuit has a plurality of detection terminals, the AND gate circuit is electrically connected to the domain controller via the plurality of detection terminals, and the output terminal of the AND gate circuit is connected to the input terminal of the detection indication circuit.

4. The wiring harness connection detection circuit according to claim 3, characterized in that: A plurality of the AND gate circuits are integrated into the same chip.

5. The wiring harness connection detection circuit according to claim 1, characterized in that: The detection indication circuit includes at least one of the following: Sound indication circuit; Display indication circuit.

6. The wiring harness connection detection circuit according to claim 1, characterized in that: The detection indicating circuit comprises: LED lights; An LED driving circuit, wherein the input end of the LED driving circuit is connected to the output end of the signal detection circuit, and the output end of the LED driving circuit is connected to the input end of the LED lamp; the LED driving circuit is used to drive the LED lamp to work according to the connection detection signal.

7. The wiring harness connection detection circuit according to claim 6, characterized in that: The LED driving circuit comprises: Switching circuit, The controlled end of the switch circuit is connected to the output end of the detection indication circuit, the input end of the switch circuit is connected to the output end of the LED lamp, and the output end of the switch circuit is used to access the ground end; the switch circuit is used to turn on or off the path between the power supply end and the LED lamp according to the connection detection signal.

8. The wiring harness connection detection circuit according to claim 1, characterized in that: The detection indication circuit includes a plurality of detection indication branches.

9. A test tool, characterized in that: The test tool includes a domain controller and a wiring harness connection detection circuit as described in any one of claims 1-8.

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