WO2011075984A1

WO2011075984A1 - Fault diagnosis system and method thereof

Info

Publication number: WO2011075984A1
Application number: PCT/CN2010/074222
Authority: WO
Inventors: 周翔; 周继辉; 吴罕奇; 彭清祥
Original assignee: 湖南三一智能控制设备有限公司; 三一重工股份有限公司
Priority date: 2009-12-25
Filing date: 2010-06-22
Publication date: 2011-06-30
Also published as: CN101762769B; CN101762769A

Abstract

A fault diagnosis system used for detecting faults of a wire vehicle includes a connection device (1), a detection device (2), a control device (3) and an output device (4). The connection device (1) connects the detection device (2) with the detected wire (9) of the wire vehicle. The detection device (2) detects each circuit status of the detected wire (9). The control device (3) receives the detected signals and compares them with the prestored standards of the detected wire (9) to judge the status of the detected wire (9). The output device (4) outputs the status of the detected wire (9). The fault diagnosis system provided by the present invention can enable the connection between wires (9) and the detection device (2) to be formed easily. The prestored standards in the control device (3) correspond with each circuit of the detected wires (9), thereby conveniently realizing the electrical control system detection of the wire vehicle and enhancing the efficiency of detection. A fault diagnosis method is also provided.

Description

The present invention claims priority to Chinese Patent Application No. 200910260222.6, entitled "Troubleshooting System and Method", filed on December 25, 2009, the entire contents of In this application. Technical field

The present invention relates to the field of construction machinery, and more particularly to a fault diagnosis system for a standard harness vehicle. Background technique

With the rapid development of China's economic construction, the performance of construction machinery is constantly improving. For the convenience of description, this paper will refer to the engineering machinery vehicle that rejects the internal devices and peripheral electrical components through the general line and is called a non-harness vehicle. The engineering machinery vehicles that are connected to the electrical components and the peripheral electrical components through the wire harness are called Harness vehicle. Among them, the wire harness is composed of an insulating sheath, a terminal, a wire, and an insulating wrapping material, and the wiring components of the electrical equipment are connected in the circuit.

In the field of construction machinery, the general components of the electronic control system of construction machinery vehicles include: electrical control, wiring and peripheral electrical components. The electronic control unit is generally provided with a control unit, a conversion circuit, a circuit board, a relay, a display, etc., and each device within the electronic control rejection is connected by a line. After the wiring is completed, the end of the line is connected to one end of the terminal block, and the periphery is connected. The wiring of the electrical component is externally wired in the electrically controlled rejection. After the wiring is completed, it is connected to the other end of the terminal block, thereby realizing the connection between the peripheral electrical component and the electronically controlled rejection.

The connection method of the above-mentioned lines has more connection points with the terminal blocks, so that the number of failure points of the electronic control system is increased, so that the failure rate of the vehicle is high. On the other hand, when wiring is electrically controlled, screws or the like are usually used. The device fixes the line, but the screw is easily loosened during the vibration process, making the electronic control system less resistant to vibration.

Therefore, in order to facilitate installation, to ensure that electrical equipment can work under the most severe conditions, reduce the failure rate of the vehicle's electronic control system, more and more engineering machinery vehicle electronic control system lines are generally replaced by standard wiring harness: The wires of different specifications and different colors used in each device are integrated into one body by reasonable arrangement, and the wires are bundled with an insulating material, and the ends thereof are terminated. Connect to the internal harness connector with high protection level, and then connect the inner harness connector to the connector on the inner side of the electronically controlled housing; the peripheral electrical components are also integrated through reasonable arrangement of wires of different specifications and different colors. The wires are bundled with an insulating material, connected to the external harness connector, and connected to the outside of the housing of the electronically controlled housing, thereby realizing communication between the peripheral electrical components and the electrical control rejection. In this way, the number of connection points is greatly reduced, and even the number of connection points is zero, thereby greatly reducing the failure rate of the vehicle electronic control system. Therefore, the use of standard wiring harnesses has become a trend of vehicle development.

However, due to the reduction of the electronic control system test points of the vehicle using the wiring harness, or even no test points at all, and the lines are all in the insulating sheath, the number of the lines is hidden, thus bringing a lot of maintenance to the line. Difficulties, on the other hand, even if the number of the line can be obtained, the internal space of the internal harness connector and the external harness connector is small, which brings great difficulty to the fault detection and reduces the detection efficiency.

Therefore, how to realize convenient and efficient fault diagnosis of the wire harness electronic control system of the wire harness vehicle is a technical problem that those skilled in the art need to solve at present. Summary of the invention

SUMMARY OF THE INVENTION An object of the present invention is to provide a fault diagnosis system for detecting a fault of a wire harness vehicle, which can realize a fault diagnosis of a wire harness electronic control system of a wire harness vehicle conveniently and efficiently.

In order to solve the above technical problem, the present invention provides a fault diagnosis system for detecting a fault of a wire harness vehicle, including a connecting device, a detecting device, a control device, and an output device; the connecting device is configured to connect the detecting device and the a detected harness of the wire harness vehicle; the detecting means for detecting a state of each line of the tested harness connected to the connecting device under control of the control device to obtain a detection signal; the control device is configured to receive the Determining a detection signal, and comparing the detection signal with a pre-stored standard of the tested harness to determine a state of the tested harness; the output device is configured to output the quilt according to a determination result of the control device Measure the status of the harness.

Preferably, the connecting means comprises a connecting harness and a connecting joint matching the joint of the harness of the harness vehicle.

Preferably, the pre-stored standard detects the wire harness in a faultless state through the fault diagnosis system The vehicle gets.

Preferably, further comprising vehicle type selecting means for selecting the pre-stored standard according to the model of the harness vehicle to be tested; the control means comparing the detection signal with the pre-stored selected by the vehicle type selecting means Standards are compared.

Preferably, further comprising a harness type selecting means for selecting the pre-stored standard according to a model of the harness of the harness vehicle; the control means comparing the detection signal with the pre-stored selected by the harness type selecting means Standards are compared.

Preferably, a power supply device is further included for selectively supplying power to the connection device, the detection device, the control device, the output device, and the wire harness to be tested.

Preferably, the alarm device is further included, and the alarm signal is alarmed when the control device determines that the detection signal does not match the pre-stored standard.

Preferably, the detection signal and the pre-stored standard are impedance signals.

In order to solve the above technical problem, the present invention also provides a fault diagnosis method for detecting a fault of a wire harness vehicle by using the fault diagnosis system, comprising the following steps:

1) connecting the fault diagnosis system and the tested harness of the wire harness vehicle;

2) selecting a pre-stored standard of the tested harness;

3) detecting a state of each line of the tested harness to obtain a detection signal;

4) comparing the detection signal and the pre-stored standard to determine the state of the tested harness;

5) Output the state of the tested harness.

Preferably, in step 2), the pre-existing criteria of the tested harness is selected by at least one of a vehicle type selection device and a harness type selection device of the fault diagnosis system.

The fault diagnosis system for detecting the fault of the electronic control system of the wire harness vehicle provided by the present invention comprises a connecting device, a detecting device, a control device and an output device; a connecting device, a connector for connecting the detecting device and the tested harness of the wire harness vehicle a detecting device, configured to detect a state of each line of the tested harness connected to the connecting device under the control of the control device to obtain a detection signal; and a control device configured to receive the detection signal and pre-store the detection signal and the detected harness The standard compares and determines the state of the wire harness to be tested; and the output device is configured to output the state of the wire harness to be tested according to the judgment result of the control device. When it is necessary to diagnose the electronic control system of the harness vehicle, the connector of the detected harness is pulled out from the harness connector on the side wall of the electronically controlled rejection, and the connection of the fault diagnosis system is used. The connecting device is connected to the detecting device and the connector of the tested harness, and the detecting device detects the signal, and obtains a detection signal, which is transmitted to the control device, and the control device compares the detected signal with the pre-stored standard of the tested harness to determine the measured harness. The status is then output through the output device. It can be seen that the connection of the connecting device can conveniently realize the connection between the wire harness and the detecting device, and the pre-stored standard inside the control device corresponds to each line of the tested harness, thereby realizing the detection of the state of each line inside the tested harness. Therefore, the detection of the electronic control system of the wire harness vehicle can be conveniently realized, the problem of difficulty in detecting the wire harness vehicle is solved, and the detection efficiency is improved.

In a preferred embodiment, the fault diagnosis system provided by the present invention further includes a vehicle type selection device, and then the pre-stored standard corresponding thereto can be selected according to the model of the harness to be tested; when the control device receives the detection signal, It compares with the pre-stored criteria selected by the vehicle type selection device to derive the line status of the harness being tested. The vehicle type selection device is set such that the standard of various vehicle types can be stored inside the control device. When a certain standard signal is required, only the corresponding pre-existing standard is selected by the vehicle type selection device, thereby greatly improving the fault diagnosis system. Adaptability.

In another preferred embodiment, the fault diagnosis system provided by the present invention further includes a power supply device for selectively supplying power to the connection device, the detection device, the control device, the output device, and the wire harness to be tested. When the measurement of the harness to be tested is performed, and the vehicle under test is in a state in which the power of the harness is turned off, the power supply device can supply power to the device to be tested and its connected load through the connection device, so that the fault diagnosis system can be turned off when the vehicle is powered off. The diagnosis of harness faults expands the applicability of fault diagnosis systems.

The beneficial effects of the fault diagnosis method provided by the present invention are similar to those of the fault diagnosis system, and will not be described herein. DRAWINGS

1 is a schematic structural diagram of a fault diagnosis system for detecting an electrical control system fault of a wire harness vehicle according to an embodiment of the present invention;

2 is a schematic structural diagram of a fault diagnosis system for detecting an electrical control system fault of a wire harness vehicle according to a second embodiment of the present invention;

3 is a schematic structural diagram of a fault diagnosis system for detecting an electrical control system fault of a wire harness vehicle according to a third embodiment of the present invention; 4 is a schematic structural diagram of a fault diagnosis system for detecting an electrical control system fault of a wire harness vehicle according to a fourth embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a fault diagnosis system for detecting an electrical control system fault of a wire harness vehicle according to a fifth embodiment of the present invention; FIG.

FIG. 6 is a schematic flow chart of a fault diagnosis method for detecting an electrical control system fault of a wire harness vehicle according to an embodiment of the present invention. detailed description

The core of the present invention is to provide a fault diagnosis system for detecting a fault of a wire harness vehicle, which can realize a fault diagnosis of the wire harness electronic control system of the wire harness vehicle conveniently and efficiently.

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

Please refer to FIG. 1. FIG. 1 is a schematic structural diagram of a fault diagnosis system for detecting an electrical control system fault of a wire harness vehicle according to an embodiment of the present invention.

As shown in FIG. 1, the fault diagnosis system for detecting the fault of an electronic control system of a wire harness vehicle includes a connecting device 1, a detecting device 2, a control device 3 and an output device 4; and a connecting device 1 for The detecting device 2 and the wire harness 9 of the wire harness vehicle are connected to prepare for fault detection of the wire harness 9 to be tested; the detecting device 2, after the connecting device 1 connects it to the wire harness 9 of the wire harness vehicle, is controlled Under the control of the device 3, the state of each line of the to-be-measured harness 9 connected to the connection device 1 is detected to obtain a detection signal; the control device 3 receives the detection signal detected by the detection device 2, and pre-stores the detection signal and the detected harness 9 The standard is compared to determine the state of the wire harness 9 to be tested; and the output device 4 is for outputting the state of the wire harness 9 to be measured based on the determination result of the control device 3. Specifically, the pre-stored standard described herein is a characteristic or characteristic range in which the lines of the tested harness 9 are in a normal state, and the detection order of the lines in the tested harness 9 can also be set inside the control device 3, and controlled by a control program. The order of detection of each line.

When it is required to diagnose the electronic control system of the wire harness vehicle, the connector of the detected harness is pulled out from the harness connector on the side wall of the electronically controlled rejection, and the connecting device 1 of the fault diagnosis system is connected to the detecting device 2 and tested. The wire harness 9, then, under the control of the control device 3, the detecting device 2 detects each line of the tested harness 9 to obtain a detection signal, and transmits the detection signal to the control device. 3, the control device 3 compares the detection signal with the pre-stored standard of the detected harness 9, determines the state of the detected harness 9, and then outputs it through the output device 4.

It can be seen that the connection of the connecting device 1 can conveniently realize the connection between the tested harness 9 and the detecting device 2. The pre-stored standard inside the control device 3 corresponds to each line of the tested harness 9, and the harness to be tested is realized. 9 The detection of the state of each internal line can conveniently realize the detection of the electronic control system of the wire harness vehicle, solve the difficulty of the wire harness vehicle detection, and improve the detection efficiency.

Specifically, the connecting device 1 may include a connecting harness and a connecting joint that matches the joint of the harness of the harness vehicle. Specifically, the connecting harness can be always connected to the detecting device 2 or separately from the detecting device 2, and when the connection is required, the two can be connected.

The connection connector of the connecting device 1 that matches the harness connector of the harness vehicle can easily establish the connection of the tested harness 9 to the detecting device 2, which greatly facilitates the detection of the harness vehicle electronic control system.

Of course, the connection between the connecting device and the wire harness 9 to be tested can also be realized by the adapter. The wire harness 9 to be tested can be specifically an internal wire harness that is electrically controlled, an external wire harness that is electrically controlled, or the detecting device 2 is connected to the electronically controlled device. Between the internal wiring harness and the external wiring harness (at this time, the adapter should be a three-way connector.) In different cases, different standards pre-stored in the control device 3 should be selected to ensure the accuracy of the detection.

The pre-stored standard in the control device 3 can be obtained by the fault diagnosis system detecting the harness vehicle in the non-fault state. When the vehicle is shipped from the factory, the detecting device of the fault diagnosis system detects each harness, obtains a detection signal, and then stores it. Thus, the acquisition of pre-existing standards is conveniently achieved.

Of course, the pre-stored standard can also be obtained by other means. For example, the characteristics of each line in the normal running state can be obtained by other detection methods before the completion of the online bundle wrapping, and stored in the control device 3, and the pre-stored standard is obtained in a specific manner. This article is not limited.

Please refer to FIG. 2. FIG. 2 is a schematic structural diagram of a fault diagnosis system for detecting an electrical control system fault of a wire harness vehicle according to a second embodiment of the present invention.

In a second embodiment, the fault diagnosis system provided by the present invention may further include a vehicle type selecting device 5, and then may select a pre-stored standard corresponding thereto according to the model of the vehicle to be tested 9; when the control device 3 receives When detecting a signal, select it and pass the vehicle type. The pre-stored criteria selected by the device 5 are compared to obtain the line state of the harness 9 to be tested.

Thus, the vehicle type selection device 5 is arranged such that the control device 3 can internally store a plurality of vehicle type standards. When a certain standard signal is required, the vehicle type selection device 5 only needs to select the corresponding pre-stored standard. The adaptability of the fault diagnosis system is greatly improved.

Please refer to FIG. 3. FIG. 3 is a schematic structural diagram of a fault diagnosis system for detecting an electrical control system fault of a wire harness vehicle according to a third embodiment of the present invention.

In a third specific embodiment, the fault diagnosis system provided by the present invention may further include a wire harness type selecting device 6. By the wire harness type selecting device 6, we can select the pre-stored in the control device 3 according to the type of the wire harness of the wire harness vehicle. The control device 3 receives the detection signal and compares it with the pre-stored standard selected by the harness type selecting means 6 to obtain the state of the harness 9 to be measured. It can be seen that the setting of the harness type selecting device 6 realizes the selection of the pre-stored standards of different harnesses of the same vehicle, thereby realizing the detection of different harnesses, and further expanding the use range of the fault diagnosis system.

Of course, in a fault diagnosis system, it is possible to include both the vehicle type selecting means 5 and the harness type selecting means 6, which also falls within the scope of the present invention.

Please refer to FIG. 4. FIG. 4 is a schematic structural diagram of a fault diagnosis system for detecting an electrical control system fault of a wire harness vehicle according to a fourth embodiment of the present invention.

Specifically, the fault diagnosis system provided by the present invention may further include a power supply device 7 for selectively supplying power to the connection device 1, the detection device 2, the control device 3, the output device 4, and the to-be-measured harness 9.

When the measurement of the harness 9 to be tested is performed, if the vehicle to be tested 9 is in a power-off state, the power supply device 7 can pass the connection device 1 to the device to be tested 9 and its connected load, and the like, and the connection device 1, the detection device 2. The control device 3 and the output device 4 are powered, so that the fault diagnosis system can diagnose the harness fault when the vehicle power is turned off, and expand the applicability of the fault diagnosis system.

Of course, it is also possible to have no power supply, only to supply power from the power supply provided in the harness of the vehicle under test.

Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of a fault diagnosis system for detecting an electrical control system fault of a wire harness vehicle according to a fifth embodiment of the present invention. In order to facilitate the convenience of people to understand the state of each line in the tested harness 9, the fault diagnosis system provided by the present invention may further include an alarm device 8. When the control device 3 determines that the detection signal does not match the pre-stored standard, the alarm device 8 is controlled to alarm. . In this way, it is only necessary to check the output result of the output device 4 when the alarm signal is obtained, and to eliminate the fault of the faulty line, which greatly reduces the work intensity of the worker, and also avoids the human error caused by the fault. The neglect of the fault.

Specifically, the detection signal and the pre-stored standard may both be impedance signals. Since the line fault of the electronic control system is usually short circuit, open circuit, etc., by measuring and comparing the impedance, the state of the line can be easily obtained and then maintained. Of course, the above detection signals and pre-stored standards can also be other signals such as current or voltage, as long as the functional requirements can be achieved. The results of the combination should fall within the scope of this article.

Please refer to FIG. 6. FIG. 6 is a schematic flowchart diagram of a fault diagnosis method for detecting an electrical control system fault of a wire harness vehicle according to an embodiment of the present invention.

In a specific embodiment, the fault diagnosis method for detecting an electronic control system fault of a wire harness vehicle using the fault diagnosis system provided by the present invention may include the following steps:

Step S1: connecting the fault diagnosis system and the tested harness 9 of the harness vehicle.

The fault diagnosis system and the tested harness 9 can be connected by using the connection device 1 of the fault diagnosis system, and the connection between the tested harness 9 and the detecting device 2 is conveniently realized, and the diagnosis of the fault of the wiring harness vehicle electronic control system is prepared, which is greatly facilitated. The detection of the harness vehicle electronic control system. Of course, the wire harness 9 to be tested may be specifically a wire harness that connects peripheral electrical components, an electrically controlled wire harness, or both.

Specifically, the connecting device 1 may include a connecting harness that is connected to the connector of the harness of the harness vehicle, and the connecting harness may be always connected to the detecting device 2 or may be separated from the detecting device 2, when connection is required, Then connect the two together.

Step S2: Select the pre-stored standard of the tested harness 9.

There are various pre-stored standards set in the fault diagnosis system. According to the condition of the tested harness 9 and the signal type of the detection signal, select the appropriate pre-stored standard. Specifically, the impedance signal can be used for both the detection signal and the pre-stored standard. Step S3: Detecting the state of each line of the tested harness 9 to obtain a detection signal.

Specifically, the state of each line inside the tested harness 9 can be detected by the detecting device 2 provided inside the fault diagnosis system to obtain a detection signal.

Step S4: Compare the detection signal with the pre-stored standard to judge the state of the tested harness 9.

By comparing the detection signal with the pre-stored standard, it is judged whether the state of each line of the tested harness 9 coincides with the pre-stored standard. If it is coincident, it indicates that the line in the tested harness 9 is in a normal state, and if it is ¹ J, the detected harness is 9 is in a fault state.

Step S5: Output the state of the harness 9 to be tested.

The state of each line of the harness to be tested 9 can be output through the output device 4 of the fault diagnosis system, so that the worker can know the state of the harness 9 to be tested and repair the faulty line.

Specifically, the pre-stored standard of the tested harness 9 can be selected by at least one of the vehicle type selecting means 5 and the harness type selecting means 6 of the fault diagnosis system in step S2. The vehicle type can be selected first by the vehicle type selecting means 5, and then the specific tested harness 9 is selected by the harness type selecting means 6 based on the vehicle type selection, thereby determining the pre-stored standard uniquely corresponding to the tested harness 9. .

The above description of the fault diagnosis system and the fault diagnosis method provided by the present invention has been described in detail only to assist in understanding the method of the present invention and its core idea. It should be noted that those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the invention.

Claims

Rights request

A fault diagnosis system for detecting a fault of a wire harness vehicle, comprising: a connecting device (1), a detecting device (2), a control device (3), and an output device (4); 1) a wire harness (9) for connecting the detecting device (2) and the wire harness vehicle; the detecting device (2) for detecting and connecting the connecting device under the control of the control device (3) 1) a state of each line of the connected harness (9) connected to obtain a detection signal; the control device (3) is configured to receive the detection signal, and the detection signal and the detected harness ( 9) comparing the pre-stored criteria to determine the state of the tested harness (9); the output device (4) is configured to output the tested harness (9) according to the determination result of the control device (3) status.

2. The fault diagnosis system according to claim 1, wherein said connecting device

(1) includes a connection harness and a connector that matches the connector of the harness of the harness vehicle.

The fault diagnosis system according to claim 2, wherein the pre-stored standard is obtained by detecting a vehicle in a fault-free state by a fault diagnosis system.

The fault diagnosis system according to any one of claims 1 to 3, further comprising a vehicle type selecting means (5) for selecting the pre-stored standard according to the model of the harness vehicle to be tested; The control device (3) compares the detection signal with the pre-stored criteria selected by the vehicle type selection device (5).

The fault diagnosis system according to any one of claims 1 to 3, further comprising a wire harness type selecting device (6) for selecting the pre-stored standard according to a model of a wire harness of the wire harness vehicle; The control device (3) compares the detection signal with the pre-stored criteria selected by the harness type (6) selection device.

The fault diagnosis system according to any one of claims 1 to 3, further comprising a power supply device (7) for selectively connecting the connection device (1) to the detection device (2) The control device (3), the output device (4), and the wire harness (9) to be tested are powered.

The fault diagnosis system according to any one of claims 1 to 3, further comprising a police device (8), when the control device (3) determines that the detection signal does not match the pre-stored standard The alarm device (8) alarms.

The fault diagnosis system according to any one of claims 1 to 3, wherein the detection signal and the pre-stored standard are impedance signals.

9. A fault diagnosis method for detecting a fault of a wiring harness vehicle by using a fault diagnosis system, comprising the following steps:

1) connecting the fault diagnosis system and the tested harness of the harness vehicle (9);

2) selecting a pre-stored standard of the tested harness (9);

3) detecting the state of each line of the tested harness (9) to obtain a detection signal;

4) comparing the detection signal with the pre-stored standard to determine the state of the tested harness (9);

5) Output the state of the tested harness (9).

10. The fault diagnosis method according to claim 9, wherein at least one of the vehicle type selecting means (5) and the harness type selecting means (6) of the fault diagnosis system is selected in step 2) Select the pre-stored standard for the tested harness (9).