CN112305453A - Automobile wire harness detection device - Google Patents
Automobile wire harness detection device Download PDFInfo
- Publication number
- CN112305453A CN112305453A CN202011177625.7A CN202011177625A CN112305453A CN 112305453 A CN112305453 A CN 112305453A CN 202011177625 A CN202011177625 A CN 202011177625A CN 112305453 A CN112305453 A CN 112305453A
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- microprocessor
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- 238000001514 detection method Methods 0.000 title claims abstract description 75
- 238000004891 communication Methods 0.000 claims abstract description 8
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000013078 crystal Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 238000012360 testing method Methods 0.000 claims description 2
- 239000000872 buffer Substances 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/52—Testing for short-circuits, leakage current or ground faults
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/54—Testing for continuity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/68—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board
- G01R31/69—Testing of releasable connections, e.g. of terminals mounted on a printed circuit board of terminals at the end of a cable or a wire harness; of plugs; of sockets, e.g. wall sockets or power sockets in appliances
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention discloses an automobile wire harness detection device, which comprises: the microprocessor is used for outputting a driving signal, receiving an input signal and judging a signal of a wire harness to be detected; the input end of the signal output circuit is connected with the output port of the microprocessor, and the output end of the signal output circuit is connected with the wire harness to be tested and used for sending the output signal of the microprocessor to the wire harness to be tested; the input end of the signal input circuit is connected with the wire harness to be tested, and the output end of the signal input circuit is connected with the input port of the microprocessor and used for receiving and sending the output signal to the microprocessor; and the CAN communication circuit consists of a CAN transceiver, and two ends of the CAN transceiver are respectively provided with a detection device interface and a microprocessor which are used for receiving a detection instruction and outputting a detection result. The detection device is simple to operate, low in cost, high in detection efficiency and high in detection reliability, and reduces the labor cost of wire harness detection.
Description
Technical Field
The invention relates to an automobile wire harness detection device, in particular to an automobile wire harness on-off detection device, and belongs to the technical field of vehicle detection.
Background
At present, automobiles develop rapidly towards the direction of intellectualization, networking and comfort, vehicle-mounted electrical equipment is more and more abundant, and automobile wire harnesses also show the characteristics of large quantity of wires and complex wiring.
The automobile wire harness is formed by combining a plurality of wires, and the two ends of the automobile wire harness are respectively provided with input connectors and output connectors in different types and different quantities.
Before the wiring harness is delivered to a host factory for assembly, whether the input plug terminals and the corresponding output plug terminals are correctly communicated needs to be detected one by one.
The traditional method for testing the conduction of the wire harness is generally realized through a universal meter, and because the wires of the wire harness are more and the wiring principle is complex, the universal meter is adopted to detect one by one, the efficiency is very low, the reliability is difficult to guarantee, and the productivity and the product quality of the wire harness are seriously influenced.
Patent document 1 discloses a wire harness detection device for an automobile, which comprises a box body, wherein a detection switch and an indicator lamp are arranged on the front surface of the box body, a connector output hole seat is arranged at the top of the box body, a power supply module is arranged at the bottom of the box body, and a connector input hole seat is arranged on the back surface of the box body; the two ends of the detected wire harness are respectively wrapped with a connector pin seat, and the aperture of the connector output hole seat and the aperture of the connector input hole seat are matched with the pipe diameter of the connector pin seat; the input end of the power supply module is connected with single-phase 220V alternating current; the positive terminal of the power supply module is connected with the detection switch and the indicator lamp in series in sequence and then is connected with the input hole seat of the connector; the invention is applied to the detection of the automobile wire harness.
Patent document 2 discloses an automobile wire harness detection tool and system, including: the detection main board comprises a power supply, a detection chip, a high-side driving chip, a first connector, an automobile wire harness, a second connector, a low-side driving chip, an LED module and a CAN interface; the power supply is connected with the detection chip; the high-side driving chip is connected with the detection chip and the first connector respectively; the first connector comprises a plurality of first terminals, the automobile wire harness comprises a plurality of wires, the second connector comprises a plurality of second terminals, two ends of each wire of the automobile wire harness are respectively connected with one first terminal and one second terminal, the second connector is connected with the low-side driving chip, and the low-side driving chip is connected with the detection chip; the LED module is connected with the detection chip; the output end of the CAN interface is connected with a CAN bus; the detection mainboard is fixed on the lower cover, and the upper cover is buckled on the lower cover, so that the detection mainboard is accommodated between the upper cover and the lower cover.
Disclosure of Invention
The invention aims to solve the problems of low efficiency and low reliability of the traditional test method of the automobile wire harness, and provides the detection device of the automobile wire harness, which is simple to operate, low in cost, high in detection efficiency and high in detection reliability, and reduces the labor cost of wire harness detection.
The scheme adopted by the invention is as follows:
an automotive wiring harness detection device, characterized by comprising:
the microprocessor is used for outputting a driving signal, receiving an input signal and judging a signal of a wire harness to be detected;
the input end of the signal output circuit is connected with the output port of the microprocessor, and the output end of the signal output circuit is connected with the wire harness to be tested and used for sending the output signal of the microprocessor to the wire harness to be tested;
the input end of the signal input circuit is connected with the wire harness to be tested, and the output end of the signal input circuit is connected with the input port of the microprocessor and used for receiving and sending the output signal to the microprocessor;
and the CAN communication circuit consists of a CAN transceiver, and two ends of the CAN transceiver are respectively provided with a detection device interface and a microprocessor which are used for receiving a detection instruction and outputting a detection result.
Preferably, the microprocessor is provided with a CAN controller for receiving the detection instruction and outputting the detection result.
Preferably, the signal output circuit is composed of an eight-way positive phase line driver and a resistor.
Preferably, the signal input circuit is composed of an eight-way positive line driver and a resistor.
Preferably, the CAN communication circuit is composed of a CAN transceiver.
Preferably, the automobile wire harness detection device further comprises a power conversion circuit, and the power conversion circuit is connected between the wire harness to be detected and the microprocessor.
Preferably, the automobile wire harness detection device further comprises a crystal oscillator which is connected with the microprocessor.
Further, the working steps of the microprocessor are as follows:
step 1, firstly, outputting a high level 1 by a wire harness number 1 corresponding to an I/O port, and outputting a low level 0 by the other wire harnesses corresponding to the I/O ports;
step 2, reading input port signal values, judging the values received by each input I/O port one by one and comparing the values with a preset result required by a wiring harness principle;
step 3, outputting a high level 1 to the I/O port corresponding to the harness number 2 and outputting a low level 0 to the I/O ports corresponding to the other harnesses at intervals of a certain time, and judging according to the process of the step 2;
and repeating the steps until the last wire harness is detected, integrating the detection result, and outputting the detection result through the CAN bus.
The invention has the beneficial effects that:
compared with the prior art, the wire harness detection system mainly adopts common electronic elements with low cost and high reliability, software implementation logic is reliable, operation is simple, results are clear, abnormal wire harnesses are convenient to troubleshoot and repair, wire harness detection efficiency and detection reliability are improved, and labor cost of wire harness detection is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below.
It is to be understood that the drawings in the following description are merely exemplary of the invention and that other drawings may be derived by those skilled in the art from the disclosure of the exemplary embodiments of the invention and these drawings without undue inventive effort.
Fig. 1 is a schematic circuit diagram of a harness on-off detection device.
FIG. 2 is a software flow diagram of the bit line beam on/off detection apparatus.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention.
It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
An automotive harness detection device comprising:
the microprocessor is provided with a plurality of paths of general input and output ports and is used for outputting a driving signal and receiving an input signal and judging the signal according to a wiring harness design principle; the CAN controller is used for receiving the detection instruction and outputting the detection result.
And the signal output circuit consists of eight normal phase line drivers/buffers and a resistor divider, wherein the input end of the signal output circuit is connected with the output port of the microprocessor, and the output end of the signal output circuit is connected with the wire harness to be tested and is used for sending the output signal of the microprocessor to the wire harness to be tested.
And the signal input circuit consists of eight normal phase line drivers/buffers and a resistor divider, wherein the input end of the signal input circuit is connected with the wire harness to be tested, and the output end of the signal input circuit is connected with the input port of the microprocessor and is used for receiving and sending the output signal to the microprocessor.
And the CAN communication circuit consists of a CAN transceiver, and two ends of the CAN transceiver are respectively provided with a detection device interface and a microprocessor which are used for receiving a detection instruction and outputting a detection result.
And the power supply conversion circuit is connected between the wire harness to be tested and the microprocessor.
A crystal oscillator connected with the microprocessor.
Example 1
As shown in fig. 1, an automotive wire harness detection apparatus includes:
the microprocessor is provided with a plurality of paths of general input and output ports and is used for outputting a driving signal and receiving an input signal and judging the signal according to a wiring harness design principle; the CAN controller is used for receiving the detection instruction and outputting the detection result.
And the signal output circuit consists of eight normal phase line drivers/buffers and a resistor divider, wherein the input end of the signal output circuit is connected with the output port of the microprocessor, and the output end of the signal output circuit is connected with the wiring harness to be tested (the connector 1 and the connector 2) and is used for sending the output signal of the microprocessor to the wiring harness to be tested.
And the signal input circuit consists of eight normal phase line drivers/buffers and a resistor divider, the input end of the signal input circuit is connected with the wiring harness to be tested (the connector 3 and the connector 4), and the output end of the signal input circuit is connected with the input port of the microprocessor and is used for receiving and sending the output signal to the microprocessor.
And the CAN communication circuit consists of a CAN transceiver, and two ends of the CAN communication circuit are respectively provided with a detection device interface (connector 2) and a microprocessor which are used for receiving a detection instruction and outputting a detection result.
And the power supply conversion circuit is connected between the wiring harness (connector 1) to be tested and the microprocessor.
A crystal oscillator connected with the microprocessor.
As shown in fig. 2, the specific working flow of the present invention is as follows:
(1) the harness number 1 corresponds to the I/O port to output a high level 1, and the other harnesses correspond to the I/O ports to output a low level 0;
(2) the software reads the signal value of the input port, judges the value received by each input I/O port one by one and compares the value with the preset result required by the wiring harness principle, for example, the number 1 is communicated with the number 3 and the number 5 of the output end, at this moment, the number 3 and the number 5 of the output terminal are high level, and the rest are low level;
(3) and (4) outputting a high level 1 to the I/O port corresponding to the wire harness number 2 at an interval of 200ms, outputting a low level 0 to the I/O ports corresponding to the other wire harnesses, and judging by referring to the step 2.
(4) And by analogy, until the last line is detected, integrating the detection result, outputting the detection result through the CAN bus, and marking the number of the abnormal wire harness and the abnormal type (short circuit or open circuit).
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An automotive wiring harness detection device, characterized by comprising:
the microprocessor is used for outputting a driving signal, receiving an input signal and judging a signal of a wire harness to be detected;
the input end of the signal output circuit is connected with the output port of the microprocessor, and the output end of the signal output circuit is connected with the wire harness to be tested and used for sending the output signal of the microprocessor to the wire harness to be tested;
the input end of the signal input circuit is connected with the wire harness to be tested, and the output end of the signal input circuit is connected with the input port of the microprocessor and used for receiving and sending the output signal to the microprocessor;
and the CAN communication circuit consists of a CAN transceiver, and two ends of the CAN transceiver are respectively provided with a detection device interface and a microprocessor which are used for receiving a detection instruction and outputting a detection result.
2. The automotive harness detection device of claim 1, wherein the microprocessor has a CAN controller for receiving the detection command and outputting the detection result.
3. The automotive harness detection device of claim 1 wherein the signal output circuit is comprised of an eight-way positive line driver and a resistor.
4. The automotive harness detection device of claim 1 wherein the signal input circuit is comprised of an eight way positive line driver and a resistor pack.
5. The automotive harness detection device of claim 1 wherein the CAN communication circuit is comprised of a CAN transceiver.
6. The automotive harness detection device of claim 1 further comprising a power conversion circuit connected between the harness under test and the microprocessor.
7. The automotive harness detection device of claim 1 further comprising a crystal oscillator coupled to the microprocessor.
8. The automotive harness detection device of claim 1, wherein the microprocessor operates by:
step 1, firstly, outputting a high level 1 by a wire harness number 1 corresponding to an I/O port, and outputting a low level 0 by the other wire harnesses corresponding to the I/O ports;
step 2, reading input port signal values, judging the values received by each input I/O port one by one and comparing the values with a preset result required by a wiring harness principle;
step 3, outputting a high level 1 to the I/O port corresponding to the harness number 2 and outputting a low level 0 to the I/O ports corresponding to the other harnesses at intervals of a certain time, and judging according to the process of the step 2;
and repeating the steps until the last wire harness is detected, integrating the detection result, and outputting the detection result through the CAN bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011177625.7A CN112305453A (en) | 2020-10-29 | 2020-10-29 | Automobile wire harness detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011177625.7A CN112305453A (en) | 2020-10-29 | 2020-10-29 | Automobile wire harness detection device |
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| Publication Number | Publication Date |
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| CN112305453A true CN112305453A (en) | 2021-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011177625.7A Pending CN112305453A (en) | 2020-10-29 | 2020-10-29 | Automobile wire harness detection device |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5623199A (en) * | 1994-11-28 | 1997-04-22 | Sumitomo Wiring Systems, Ltd. | Device for inspecting wiring harness |
| IES970921A2 (en) * | 1997-12-22 | 1998-04-08 | Qualtron R & D Teoranta | Testing of Cable Harnesses |
| KR20000049837A (en) * | 2000-05-02 | 2000-08-05 | 주도식 | Multi Functional System for Testing Erroneous Wiring of Wiring Harness and Method thereof |
| CN102156237A (en) * | 2011-03-08 | 2011-08-17 | 江苏大学 | Method and device for detecting automotive harnesses |
| CN203133218U (en) * | 2013-03-06 | 2013-08-14 | 江南大学 | Automatic testing apparatus for wire harness |
| CN104820156A (en) * | 2015-04-27 | 2015-08-05 | 潍柴动力股份有限公司 | Wire harness detection device and method |
| CN205643586U (en) * | 2016-04-25 | 2016-10-12 | 北京新能源汽车股份有限公司 | Electric motor car low pressure pencil detection device |
| CN207352105U (en) * | 2017-09-25 | 2018-05-11 | 合肥创宇新能源科技有限公司 | A kind of low voltage wiring harness detection device |
| CN210005664U (en) * | 2019-02-28 | 2020-01-31 | 北京智行者科技有限公司 | automobile wire harness detection tool and system |
| CN111308391A (en) * | 2020-03-05 | 2020-06-19 | 南通大学 | Automobile wire harness conduction detection circuit |
-
2020
- 2020-10-29 CN CN202011177625.7A patent/CN112305453A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5623199A (en) * | 1994-11-28 | 1997-04-22 | Sumitomo Wiring Systems, Ltd. | Device for inspecting wiring harness |
| IES970921A2 (en) * | 1997-12-22 | 1998-04-08 | Qualtron R & D Teoranta | Testing of Cable Harnesses |
| KR20000049837A (en) * | 2000-05-02 | 2000-08-05 | 주도식 | Multi Functional System for Testing Erroneous Wiring of Wiring Harness and Method thereof |
| CN102156237A (en) * | 2011-03-08 | 2011-08-17 | 江苏大学 | Method and device for detecting automotive harnesses |
| CN203133218U (en) * | 2013-03-06 | 2013-08-14 | 江南大学 | Automatic testing apparatus for wire harness |
| CN104820156A (en) * | 2015-04-27 | 2015-08-05 | 潍柴动力股份有限公司 | Wire harness detection device and method |
| CN205643586U (en) * | 2016-04-25 | 2016-10-12 | 北京新能源汽车股份有限公司 | Electric motor car low pressure pencil detection device |
| CN207352105U (en) * | 2017-09-25 | 2018-05-11 | 合肥创宇新能源科技有限公司 | A kind of low voltage wiring harness detection device |
| CN210005664U (en) * | 2019-02-28 | 2020-01-31 | 北京智行者科技有限公司 | automobile wire harness detection tool and system |
| CN111308391A (en) * | 2020-03-05 | 2020-06-19 | 南通大学 | Automobile wire harness conduction detection circuit |
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