A hydrogen fuel vehicle wiring harness installation detection system, circuit and method

Abstract

The present invention provides a hydrogen fuel vehicle wiring harness installation detection system, circuit and method, which are formed by a total negative electrode, a power switch, a vehicle signal output integrated terminal, a transfer interface integrated terminal, a test integrated interface terminal, a test signal acquisition and drive integrated terminal, and a signal display unit in series. It is convenient to perform adaptability detection according to different wiring harnesses and design system access ports based on different system signal types, with fast detection speed, high accuracy and strong adaptability.

Description

Technical Field

[0001] The invention relates to the technical field of automobile detection, and in particular to a hydrogen fuel automobile wiring harness installation detection system, circuit and method. Background Art

[0002] With the popularity of hydrogen fuel cell vehicles, today's cars have become smarter and more energy-efficient, but there will be more and more electronic controllers on new energy vehicles to improve the safety, comfort and control convenience of new energy vehicles. More and more vehicle wiring harnesses are installed on new energy vehicles such as hydrogen fuel cell vehicles, which makes the electrical structure of the car more complicated, which also makes the inspection workload of all wiring harnesses on the car before installation very large. Therefore, hydrogen energy vehicles and other new energy vehicles must undergo strict vehicle wiring harness testing before leaving the factory to ensure that each vehicle product has no functional problems.

[0003] There are many existing methods for testing the functions of automotive components. The usual practice in the past was to develop a proprietary parameter detection system for each product. This method can achieve fast and reliable testing purposes, but the adaptability and versatility of this proprietary parameter detection system are very poor. If the proprietary parameter detection system is applied to the testing of other electronic components, the detection workload will be very large, especially when testing the functional status of the vehicle wiring harness assembly. Summary of the invention

[0004] A major problem solved by the present invention is that the existing vehicle wiring harness pre-installation detection system has a large detection workload and poor adaptability.

[0005] According to one aspect of the present invention, the present invention provides a hydrogen fuel vehicle wiring harness installation detection system, comprising: a total negative electrode, a power switch, a vehicle signal output integrated terminal, a transfer interface integrated terminal, a test integrated interface terminal, a test signal acquisition and drive integrated terminal, and a signal display unit;

[0006] The first end of the total negative electrode is electrically connected to the first end of the power switch, and the second end of the total negative electrode is grounded;

[0007] The second end of the power switch is electrically connected to one end of the vehicle signal output integration end;

[0008] The signal output end of the vehicle signal output integrated end is electrically connected to the signal input end of the transfer interface integrated end;

[0009] The signal output end of the transfer interface integrated end is electrically connected to the signal input end of the test integrated interface end;

[0010] The signal output end of the test integrated interface end is electrically connected to the signal input end of the test signal acquisition and drive integrated end;

[0011] The signal output terminal of the test signal acquisition and driving integrated terminal is electrically connected to the signal input terminal of the signal display unit;

[0012] The test signal acquisition and drive integrated terminal is also electrically connected to the second terminal of the power switch.

[0013] Furthermore, the vehicle signal output integrated terminal includes an electrically connected vehicle product terminal integration and a vehicle wiring harness integrated terminal.

[0014] Furthermore, the adapter interface integrated end includes a ground adapter interface, a power adapter interface and a resistance adapter interface, and the ground adapter interface, the power adapter interface and the resistance adapter interface are connected in parallel.

[0015] Furthermore, the test integrated interface end includes a ground test integrated interface, a power test integrated interface and a resistance test integrated interface, and the ground test integrated interface, the power test integrated interface and the resistance test integrated interface are connected in parallel.

[0016] Furthermore, the ground transfer interface terminal is electrically connected to the ground test integrated interface terminal, including:

[0017] The grounding adapter interface is connected in series with the grounding test integrated interface;

[0018] The power adapter interface is connected in series with the power test integrated interface;

[0019] The resistance transfer interface is connected in series with the resistance test integrated interface.

[0020] Furthermore, the hydrogen fuel vehicle wiring harness installation detection circuit is applicable to a hydrogen fuel vehicle wiring harness installation detection system as described in any of the preceding items, comprising:

[0021] The first resistor, the second resistor and the anti-reverse diode are connected in series to form a limiting loop;

[0022] The first resistor is electrically connected to the power signal output terminal of the test signal acquisition and drive integrated terminal;

[0023] The anti-reverse diode is electrically connected to the ground signal output terminal of the test signal acquisition and driving integrated terminal;

[0024] Leading out a signal output pin of the limiting loop from a connection line between the first resistor and the second resistor;

[0025] The load at the end of the tested vehicle product is electrically connected to the limiting circuit.

[0026] Further, the first resistor is an adjustable voltage-dividing resistor;

[0027] The second resistor is an adjustable test resistor;

[0028] The load at the end of the tested vehicle product is a resistive load, and the resistive load is connected in parallel with the adjustable test resistor.

[0029] Furthermore, the first resistor is a current limiting resistor, and an LED display unit is connected in series between the current limiting resistor and the power signal output terminal;

[0030] The second resistor is a voltage dividing resistor;

[0031] One end of the load at the end of the tested vehicle product is connected to the circuit between the current limiting resistor and the voltage dividing resistor.

[0032] Furthermore, the load at the end of the tested vehicle product is a grounded load or a power supply load.

[0033] According to another aspect of the present invention, a method for detecting the wiring harness of a hydrogen fuel vehicle is also provided. When the wiring harness of a hydrogen fuel vehicle is installed and detected, the system is used to implement the method for detecting the wiring harness of a hydrogen fuel vehicle when the system is running. The method for detecting the wiring harness of a hydrogen fuel vehicle comprises:

[0034] When the load at the end of the tested vehicle product is not connected to the detection circuit, if the voltage of the signal output pin is a first preset value, the detection system is considered normal, otherwise the detection system is considered abnormal;

[0035] When the detection system is normal, the load at the end of the vehicle product to be tested is connected to the detection circuit;

[0036] Determine the load condition of the tested vehicle product according to the detection circuit:

[0037] If the voltage of the signal output pin is a second preset value, it is determined that the load condition of the tested vehicle product is that the wiring harness system is normal;

[0038] If the voltage of the signal output pin is the first preset value, it is determined that the load condition of the tested vehicle product is a circuit breaker at the tested vehicle product end;

[0039] If the voltage of the signal output pin is not equal to the first preset value and not equal to the second preset value, it is determined that the load condition of the tested whole vehicle product is abnormal at the load end of the tested whole vehicle product;

[0040] Based on the load condition of the tested vehicle product, a judgment signal is sent to the display screen.

[0041] The present invention provides a hydrogen fuel vehicle wiring harness installation detection system, circuit and method, which can facilitate adaptability detection according to different wiring harnesses and design system access ports based on different system signal types. The detection speed is fast, the accuracy is high, and the adaptability is strong. The entire vehicle wiring harness system can be well maintained and the system compatibility can be enhanced in the future. In addition, the detection information can be intuitively received by setting LED lights and corresponding information display screens. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0043] Figure 1 The present invention is a schematic diagram of a hydrogen fuel vehicle wiring harness installation detection system in an embodiment of the present invention.

[0044] Figure 2 The figure is a schematic diagram of the principle of a load resistance type test circuit in an embodiment of the present invention.

[0045] Figure 3 The figure is a schematic diagram of the principle of a load grounding test circuit in an embodiment of the present invention.

[0046] Figure 4 The figure is a schematic diagram of the principle of a load power supply type test circuit in an embodiment of the present invention.

[0047] Figure 1 In: 1- vehicle product end integration, 2- vehicle wiring harness integration end, 3- system power switch, 4- grounding transfer interface, 5- grounding test integration interface, 6- power transfer interface, 7- power test integration interface, 8- resistance transfer interface, 9- resistance test integration interface, 10- test signal acquisition and drive integration end, 11- signal acquisition display screen, 12- total negative pole. DETAILED DESCRIPTION

[0048] Various exemplary embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention.

[0049] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0050] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0051] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0052] Technologies, methods, and apparatus known to ordinary technicians in the relevant field may not be discussed in detail, but where appropriate, such technologies, methods, and apparatus should be considered part of the authorization specification.

[0053] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0054] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0055] Embodiment 1 provides a hydrogen fuel vehicle wiring harness installation detection system: including a total negative electrode, a power switch, a vehicle signal output integrated terminal, a transfer interface integrated terminal, a test integrated interface terminal, a test signal acquisition and drive integrated terminal, and a signal display unit;

[0056] In some embodiments: Figure 1 As shown, it is a schematic diagram of a hydrogen fuel vehicle wiring harness loading and detection system, wherein 1 is the whole vehicle product end integration, 2 is the whole vehicle wiring harness integration end, 3 is the system power switch, 4 is the grounding adapter interface, 5 is the grounding test integration interface, 6 is the power adapter interface, 7 is the power test integration interface, 8 is the resistance adapter interface, 9 is the resistance test integration interface, 10 is the test signal acquisition and drive integration end, 11 is the signal acquisition display screen, and 12 is the total negative electrode;

[0057] The vehicle signal output integrated terminal is composed of a vehicle product terminal integrated terminal 1 and a vehicle wiring harness integrated terminal 2 which are electrically connected;

[0058] The transfer interface integrated end is composed of a ground transfer interface 4, a power transfer interface 6 and a resistance transfer interface 8 connected in parallel; the vehicle signal output integrated end composed of the vehicle product end integration 1 and the vehicle wiring harness integrated end 2 is electrically connected to the transfer interface integrated end composed of the ground transfer interface 4, the power transfer interface 6 and the resistance transfer interface 8, so that the ground measurement signal, the power measurement signal and the resistance measurement signal output by the vehicle signal output integrated end are respectively input into the ground transfer interface 4, the power transfer interface 6 and the resistance transfer interface 8, so as to realize the output of the vehicle product signal, and at the same time, for different test objects, only the connection mode or the connection port of the transfer interface needs to be changed to realize the compatibility and portability of the detection system;

[0059] The ground transfer interface 4 and the ground test integrated interface 5, the power transfer interface 6 and the power test integrated interface 7, the resistance transfer interface 8 and the resistance test integrated interface 9 are respectively connected in series in pairs, so as to realize the connection between the transfer interface of the component to be tested and the test system composed of multiple test interfaces including at least the aforementioned test integrated interfaces;

[0060] The test integrated interface end is composed of a ground test integrated interface 5, a power test integrated interface 7 and a resistance test integrated interface 9 connected in parallel, and the test integrated interface end is connected to the test signal acquisition and drive integrated end 10 to realize the input of the test system acquisition signal and the output of the drive signal;

[0061] The test signal acquisition and drive integrated terminal 10 is electrically connected to the signal display screen 11, and is used to output the collected test signal to the display screen for display, so as to obtain the final test result.

[0062] The system power switch 3 is electrically connected to the vehicle wiring harness integration terminal and the test signal acquisition and drive integration terminal, and can control the opening and closing of the system.

[0063] One end of the total negative electrode 12 is grounded, and the other end is electrically connected to the system power switch 3 .

[0064] Embodiment 2: Figure 2 As shown, it is a schematic diagram of a load resistance type test circuit that can be used in the first embodiment of the present embodiment, wherein 101 is a power signal output by the test signal acquisition and drive integrated terminal, 102 is a ground signal output by the test signal acquisition and drive integrated terminal, 103 is an adjustable voltage divider resistor R1, 104 is an adjustable test resistor R2, 105 is an anti-reverse diode VD1, R1, R2 and VD1 are connected in series to form a limiting loop, and the current of the limiting loop flows from the power signal 101 to the limiting loop, and then flows to the ground signal 102, so as to prevent the external power signal from damaging the present detection circuit;

[0065] 106 is a resistance load R3 at the end of the product under test, R3 is connected in parallel with R2, 111 is a signal output pin, one end of the signal output pin is connected to the test signal acquisition and drive integration end, and the other end is connected to the circuit close to R1 on the limiting loop;

[0066] In some embodiments, a detection method based on the aforementioned detection circuit is disclosed, where R1=R2=R3, the power supply voltage is U, and when the resistance load at the end of the tested vehicle product is not connected, OUT1 is 0.5U, or other values ​​close to 0.5U, otherwise, it is considered that the detection system is abnormal and needs to be checked;

[0067] When the detection system is normal, connect the resistance load of the product under test to the detection circuit for detection:

[0068] If OUT1 is about 0.33U, or other values ​​close to 0.33U, then this part of the wiring harness system is normal. If OUT1 is still 0.5U or other values ​​close to 0.5U, it is determined that the circuit is broken at the end of the tested product, and the wiring harness of the tested product needs to be checked. If OUT1 is other values, it is considered that the tested product is abnormal and needs to be checked.

[0069] The final information determined according to the above steps is sent to the display screen, which then performs wiring harness installation or displays related information.

[0070] Embodiment three, as Figure 3 As shown, a load grounding type test circuit is disclosed, wherein 201 is a power signal output by the test signal acquisition and drive integrated terminal, 202 is a ground signal output by the test signal acquisition and drive integrated terminal, 203 is a current limiting resistor R4, 204 is a voltage dividing resistor R5, which performs loop voltage division, 205 is an anti-reverse diode VD1, R4, R5 and VD1 are connected in series to form a limiting loop circuit to protect the loop safety, and the current of the limiting loop flows from 201-limiting loop circuit-202 to prevent the external power supply signal from damaging the detection circuit;

[0071] 206 is a grounded load at the end of the product under test, 211 is a signal output pin, the signal output pin 211 is connected to the test signal acquisition and drive integration end, and the other end is connected to the limiting loop, and its connection point is close to R4.

[0072] In some embodiments, a detection method based on the aforementioned load grounding type detection circuit is also disclosed.

[0073] Among them, let R4=R5, the power supply voltage is U, when the ground load at the tested product end is not connected, OUT1 is about 0.5U, otherwise it is considered that the detection system is abnormal and needs to be checked;

[0074] When the detection system is normal, connect the grounded load of the product under test to the detection circuit for detection:

[0075] If OUT1 is approximately 0V, it is considered that this part of the wiring harness system is normal;

[0076] If OUT1 is still 0.5U, it is determined that the ground circuit of the tested product is broken, and the wiring harness of the tested product needs to be checked;

[0077] If OUT1 is other values, it is considered that the grounding of the tested product is abnormal, and it is necessary to check and determine, and send the final information of the judgment to the display screen, which will display the relevant fault information. Among them, 207 is a green LED display light, and when the circuit is working normally, the LED will light up normally.

[0078] Embodiment 4, as Figure 4As shown, a load power supply type test circuit is disclosed, wherein 301 is a power supply signal output by the test signal acquisition and drive integrated terminal, 302 is a ground signal output by the test signal acquisition and drive integrated terminal, 303 is a current limiting resistor R6, 304 is a voltage dividing resistor R7, which performs loop voltage division, 305 is an anti-reverse diode VD1, R4, R5 and VD1 are connected in series to form a limiting loop circuit, which plays a role in protecting the loop safety, and the current of the limiting loop flows from 301-limiting loop circuit-302 to prevent the external power supply signal from damaging the detection circuit;

[0079] 306 is the power load of the tested product end, 311 is the signal output pin, the signal output pin 311 is connected to the test signal acquisition and drive integration end, and the other end is connected to the limiting loop, and the connection point is close to R6.

[0080] In some embodiments, a detection method based on the aforementioned power supply grounding type detection circuit is also disclosed.

[0081] Among them, let R6=R7, the power supply voltage is U, when the ground load at the tested product end is not connected, OUT1 is about 0.5U, otherwise it is considered that the detection system is abnormal and needs to be checked;

[0082] When the detection system is normal, connect the power load of the product under test to the detection circuit for detection:

[0083] If OUT1 is approximately U, then this part of the wiring harness system is considered normal;

[0084] If OUT1 is still 0.5U, it is determined that the power supply of the tested product is broken, and the wiring harness of the tested product needs to be checked;

[0085] If OUT1 is other values, it is considered that the grounding of the tested product is abnormal, and it is necessary to check and determine, and send the final information of the judgment to the display screen, which will display the relevant fault information. Among them, 307 is a red LED display light. When the circuit is working normally, the red LED will not light up.

[0086] According to the above description, the detection system provided by the embodiment of the present invention has a simple structure, low cost, fast detection speed, high detection accuracy, easy disassembly and assembly, and is easy to adapt to different wiring harnesses. The corresponding ports are designed according to different signal types, which can be well maintained and enhance the system compatibility. It has a system prompt light and a corresponding information display screen, and a humanized design. The internal resistance of the system detection circuit is an adjustable resistance, which can be adaptively adjusted according to different circuit characteristics. At the same time, it is suitable for wiring harness detection of different types of automobiles and has strong applicability. In addition, the system adopts a multi-segment segmented connection, which is conducive to wiring harness and signal troubleshooting, simplifies the system, and achieves the maximum compatibility of the system.

[0087] According to the principles of the load resistance type, grounding type and power supply type detection circuits and detection methods disclosed in the aforementioned embodiments, detection of other types of loads can be added thereto.

[0088] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0089] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

Claims

1. A hydrogen fuel vehicle wiring harness loading detection system, characterized in that: include: Total negative pole, power switch, vehicle signal output integrated terminal, transfer interface integrated terminal, test integrated interface terminal, test signal acquisition and drive integrated terminal, and signal display unit; The first end of the total negative electrode is electrically connected to the first end of the power switch, and the second end of the total negative electrode is grounded; The second end of the power switch is electrically connected to one end of the vehicle signal output integration end; The vehicle signal output integrated end includes an electrically connected vehicle product end integrated end and a vehicle wiring harness integrated end; the signal output end of the vehicle signal output integrated end is electrically connected to the signal input end of the transfer interface integrated end; The transfer interface integrated end includes a ground transfer interface, a power transfer interface and a resistance transfer interface, and the ground transfer interface, the power transfer interface and the resistance transfer interface are connected in parallel; The signal output end of the transfer interface integrated end is electrically connected to the signal input end of the test integrated interface end; The signal output end of the test integrated interface end is electrically connected to the signal input end of the test signal acquisition and drive integrated end; The signal output terminal of the test signal acquisition and driving integrated terminal is electrically connected to the signal input terminal of the signal display unit; The test signal acquisition and drive integrated terminal is also electrically connected to the second terminal of the power switch.

2. A hydrogen fuel vehicle wiring harness installation detection system as claimed in any one of claim 1, characterized in that: The test integrated interface end includes a ground test integrated interface, a power test integrated interface and a resistance test integrated interface, and the ground test integrated interface, the power test integrated interface and the resistance test integrated interface are connected in parallel.

3. A hydrogen fuel vehicle wiring harness installation detection system as claimed in claim 2, characterized in that: The electrical connection between the ground transfer interface terminal and the ground test integrated interface terminal includes: The grounding adapter interface is connected in series with the grounding test integrated interface; The power adapter interface is connected in series with the power test integrated interface; The resistance transfer interface is connected in series with the resistance test integrated interface.

4. A hydrogen fuel vehicle wiring harness loading detection circuit, characterized in that: The hydrogen fuel vehicle wiring harness installation detection circuit is applicable to a hydrogen fuel vehicle wiring harness installation detection system as claimed in any one of claims 1 to 3, comprising: The first resistor, the second resistor and the anti-reverse diode are connected in series to form a limiting loop; The first resistor is electrically connected to the power signal output terminal of the test signal acquisition and drive integrated terminal; The anti-reverse diode is electrically connected to the ground signal output terminal of the test signal acquisition and driving integrated terminal; Leading out a signal output pin of the limiting loop from a connection line between the first resistor and the second resistor; The load at the end of the tested vehicle product is electrically connected to the limiting circuit.

5. A hydrogen fuel vehicle wiring harness installation detection circuit as claimed in claim 4, characterized in that: The first resistor is an adjustable voltage-dividing resistor; The second resistor is an adjustable test resistor; The load at the end of the tested vehicle product is a resistive load, and the resistive load is connected in parallel with the adjustable test resistor.

6. A hydrogen fuel vehicle wiring harness installation detection circuit as claimed in claim 4, characterized in that: The first resistor is a current limiting resistor, and an LED display unit is connected in series between the current limiting resistor and the power signal output terminal; The second resistor is a voltage dividing resistor; One end of the load at the end of the tested vehicle product is connected to the circuit between the current limiting resistor and the voltage dividing resistor.

7. A hydrogen fuel vehicle wiring harness installation detection circuit as claimed in claim 6, characterized in that: The load at the end of the tested vehicle product is a ground load or a power supply load.

8. A method for detecting the wiring harness of a hydrogen fuel vehicle, characterized in that: A hydrogen fuel vehicle wiring harness loading detection system as claimed in any one of claims 1 to 3 is used to implement a hydrogen fuel vehicle wiring harness loading detection method when running, and the hydrogen fuel vehicle wiring harness loading detection method comprises: When the load at the end of the tested vehicle product is not connected to the detection circuit, if the voltage of the signal output pin is a first preset value, the detection system is considered normal, otherwise the detection system is considered abnormal; When the detection system is normal, the load at the end of the vehicle product to be tested is connected to the detection circuit; Determine the load condition of the tested vehicle product according to the detection circuit: If the voltage of the signal output pin is a second preset value, it is determined that the load condition of the tested vehicle product is that the wiring harness system is normal; If the voltage of the signal output pin is the first preset value, it is determined that the load condition of the tested vehicle product is a circuit breaker at the tested vehicle product end; If the voltage of the signal output pin is not equal to the first preset value and not equal to the second preset value, it is determined that the load condition of the tested whole vehicle product is abnormal at the load end of the tested whole vehicle product; Based on the load condition of the tested vehicle product, a judgment signal is sent to the display screen.

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