CN111025185A - Automobile wire harness conduction detection system - Google Patents
Automobile wire harness conduction detection system Download PDFInfo
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- CN111025185A CN111025185A CN201911282925.9A CN201911282925A CN111025185A CN 111025185 A CN111025185 A CN 111025185A CN 201911282925 A CN201911282925 A CN 201911282925A CN 111025185 A CN111025185 A CN 111025185A
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Abstract
The invention discloses an automobile wire harness conduction detection system, which comprises the following steps: A. analyzing and processing the wire number connection information in the wire harness design drawing and storing the wire number connection information in the design matrix; B. the system mainboard sends a detection command to each unit board, detects a dot matrix formed by pins and observes signal information of the dot matrix; C. the unit board sequentially selects 1 pin X to apply a certain voltage to the pin X, and circularly scans and reads the voltage change condition of the rest pins; D. the state signal {0,1} is converted into the digital information of the detection matrix, the digital information of the matrix and the design matrix are operated to obtain the judgment matrix, and the state of the wire harness is judged.
Description
Technical Field
The invention relates to the technical field of automobile wire harness conduction detection, in particular to an automobile wire harness conduction detection system.
Background
The automobile wire harness is a nerve venation of an automobile and is a carrier for transmitting signals of a transmission system, a braking system, a walking system and a steering system of the automobile, so that the safety and the reliability of the wire harness are the guarantee for the normal running of the automobile. And the wire harness is inevitably subjected to faults such as short circuit, open circuit and the like in the production process, once the unqualified wire harness flows into the market, the potential safety hazard of the automobile is rapidly increased, and even the tragedy of automobile damage and death occurs. With the increasing requirements of people on the safety performance of automobiles, the produced automobile wire harnesses are more complex, and a plurality of difficulties are brought to the fault detection of the wire harnesses.
The traditional detection method judges the on-off of the wiring harness by using tools such as a universal meter and the like in a point-by-point lap joint mode, is low in speed, low in detection efficiency, low in intelligent level, high in quality requirement on detection personnel, and easy to cause wrong detection and missed detection of the wiring harness.
The domestic fault detection and diagnosis technology of related wire harnesses is in a starting stage, and has the problems of low detection level, time and labor consumption, low intellectualization, high error rate, limited detection quantity and the like. Although a relatively specialized and automatic wire harness detection system is available abroad, the accuracy is high, but the cost is high, but the expensive equipment cannot be borne by domestic small-sized automobile wire harness manufacturers.
Disclosure of Invention
The invention aims to provide an automobile wire harness conduction detection system to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an automobile wire harness conduction detection system comprises the following steps:
A. analyzing and processing the wire number connection information in the wire harness design drawing and storing the wire number connection information in the design matrix;
B. the system mainboard sends a detection command to each unit board, detects a dot matrix formed by pins and observes signal information of the dot matrix;
C. the unit board sequentially selects 1 pin X to apply a certain voltage to the pin X, and circularly scans and reads the voltage change condition of the rest pins;
D. converting the state signal {0,1} into digital information of the detection matrix, and calculating the digital information of the matrix and the design matrix to obtain a judgment matrix and judge the state of the wire harness.
Preferably, according to step A automobile wire harness conduction detection system on including the host computer, serial data transmission channel, the cell board, by survey wire harness data point and mainboard, the host computer issues the test command to next machine mainboard and cell board through serial data transmission channel, STM32 in the mainboard of next machine is through analytic serial port command, sends different detection pulse waveform to the cell board, and the host computer carries out corresponding transform and operation to received data, shows the diagnostic result in real time on the interface to show fault information and print through the printer, fix a position trouble pencil.
Preferably, the lower computer work flow according to the step D
a. Firstly, the upper computer opens a serial port and a thread, scans the number of a detected wire harness by using a bar code gun, judges whether the wire harness is consistent with a system target wire harness or not, and starts to detect by the lower computer if the wire harness is consistent with the system target wire harness;
b. then, carrying out board card self-checking on the unit board and the main board, further judging whether the main board and the unit board are all electrified, and obtaining the number of the unit boards;
c. an STM32 chip in the mainboard sends a detection pulse to the cell board, and the cell board supplies power to a single test point through the HC595 chip at the rising edge of the detection pulse;
d. detecting the falling edge of the pulse, and collecting data of the rest n-1 test points by using HC 165; if the voltage data approximate to the test point exists, the voltage data is marked as conduction 1, otherwise, the voltage data is marked as 0, and the conduction 1 is marked, so that the conduction data generated when the unit board supplies power to other points subsequently is prevented from covering the conduction data. And the lower computer uploads the data stored by the STM32 to the upper computer.
Preferably, an automobile wire harness conduction detection system, its characterized in that: the working process of the upper computer according to the step D
a. The upper computer screens, filters, processes and judges the acquired data;
b. judging the state of the wiring harness at the moment, if the wiring harness is in a short-circuit fault, generating a red wire, if the wiring harness is in a broken circuit fault, generating a green wire, conducting, eliminating a corresponding connecting wire and a corresponding port, if the connecting wire, the air tightness and the locking information do not exist, successfully testing, if the canvas is not empty, unplugging and plugging the actual sheath again according to the position of the sheath on the canvas, which is broken circuit and short circuit, until the content of the canvas is not empty again, the wiring harness is in a fault, and if the information frame of the air tightness and the locking has data, the test bench has the problems of poor air tightness, incapability of working of;
c. and checking the fault information, selecting a printer to print a fault report and ending the test.
Compared with the prior art, the invention has the beneficial effects that:
(1) the problem of finding short circuit and open circuit faults of the wiring harness is solved, the system can quickly locate the fault wiring harness, and fault diagnosis of the wiring harness is realized;
(2) the problem that the number of the wire harness test points is limited is solved, one unit board can detect 64 wire harness points, the number of the wire harness test points can be expanded by plugging a plurality of unit boards, and therefore the number of the test points is not limited;
(3) the lower computer avoids storing the harness conduction data for two or more times by marking the conducted wire beam spots, so that the conduction data uploaded by one cell board is controlled within 64 groups, the data transmission quantity is greatly reduced, and the detection time is shortened.
Drawings
FIG. 1 is a schematic diagram of the overall framework of the system of the present invention;
FIG. 2 is a flow chart of the system operation of the present invention;
FIG. 3 is a wiring harness fault-free model of the present invention;
FIG. 4 is a wiring harness open circuit fault model of the present invention;
fig. 5 is a wiring harness short-circuit fault model of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides a technical solution: an automobile wire harness conduction detection system comprises the following steps:
A. analyzing and processing the wire number connection information in the wire harness design drawing and storing the wire number connection information in the design matrix;
B. the system mainboard sends a detection command to each unit board, detects a dot matrix formed by pins and observes signal information of the dot matrix;
C. the unit board sequentially selects 1 pin X to apply a certain voltage to the pin X, and circularly scans and reads the voltage change condition of the rest pins;
D. converting the state signal {0,1} into digital information of the detection matrix, and calculating the digital information of the matrix and the design matrix to obtain a judgment matrix and judge the state of the wire harness.
The automobile wire harness conduction detection system comprises an upper computer, a serial port data transmission channel, a unit board, a detected wire harness data point, a mainboard and the upper computer, wherein a detection command is issued to the lower computer mainboard and the unit board through the serial port data transmission channel, STM32 in the mainboard of the lower computer sends different detection pulse waveforms to the unit board through analyzing the serial port command, the upper computer performs corresponding transformation and operation on received data, a diagnosis result is displayed on an interface in real time, and fault information is displayed and printed through a printer to be positioned on a fault wire harness.
When the automobile wire harness conduction detection is carried out on the wire harness detection, firstly, an upper computer opens a serial port and a thread, a bar code gun is used for scanning the number of a detected wire harness, whether the wire harness is consistent with a system target wire harness or not is judged, and if so, a lower computer starts to detect;
and then, carrying out board card self-checking on the unit board and the mainboard, further judging whether the mainboard and the unit board are all electrified, and obtaining the number of the unit boards.
The STM32 chip in the mainboard sends the detection pulse to the cell board, and the cell board passes through HC595 chip at the rising edge of detection pulse and supplies power to single test point.
Detecting the falling edge of the pulse, and collecting data of the rest n-1 test points by using HC 165; if the voltage data approximate to the test point exists, the voltage data is marked as conduction 1, otherwise, the voltage data is marked as 0, and the conduction 1 is marked, so that the conduction data generated when the unit board supplies power to other points subsequently is prevented from covering the conduction data. And the lower computer uploads the data stored by the STM32 to the upper computer.
And then the upper computer screens, filters, processes and judges the acquired data, judges the state of the wiring harness at the moment, generates a red line if the wiring harness is in a short-circuit fault, generates a green line if the wiring harness is in a broken circuit fault, eliminates a corresponding connecting line and a corresponding port if the wiring harness is switched on, tests successfully when the wiring harness is not in an airtight and locked state, pulls out and inserts the actual sheath again according to the position of the broken circuit and the short circuit of the sheath on the canvas if the canvas is not in an empty state again, checks the fault information, selects a printer to print a fault report if the canvas content is not in an empty state again, and solves the problems that the airtightness is not good, the module lock cannot work and the like of the test bench if the airtight and locked information frame has data, and finishes the.
The no-fault model 101 in the automobile wire harness conduction detection system has two groups of overlap points, the number of the overlap points is 1 and 4 respectively, and the two groups of overlap points are formed by a combined formula
The calculation shows that 101 has 6 groups of connection relations and all the connections are normal, and the open circuit fault model 102 has open circuit faults at root nodes and leaf nodes; while the short-circuit fault model 103 coexists in two types of short-circuit faults, respectively occurring at the root node and leaf nodes,
wherein: n is the number of the overlap points, and m is the total number of the points connected with the overlap points.
In conclusion, the invention solves the discovery problem of short circuit and open circuit faults of the wire harness, the system can quickly position the fault wire harness, the fault diagnosis of the wire harness is realized, the problem that the number of test points of the wire harness is limited is solved, the number of the test points of the wire harness is not limited, the transmission quantity of data is greatly reduced, and the detection time is shortened.
The invention has the beneficial effects that:
(1) the problem of finding short circuit and open circuit faults of the wiring harness is solved, the system can quickly locate the fault wiring harness, and fault diagnosis of the wiring harness is realized;
(2) the problem that the number of the wire harness test points is limited is solved, one unit board can detect 64 wire harness points, the number of the wire harness test points can be expanded by plugging a plurality of unit boards, and therefore the number of the test points is not limited;
(3) the lower computer avoids storing the harness conduction data for two or more times by marking the conducted wire beam spots, so that the conduction data uploaded by one cell board is controlled within 64 groups, the data transmission quantity is greatly reduced, and the detection time is shortened.
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 (4)
1. The utility model provides an automobile wire harness conduction detection system which characterized in that: the method comprises the following steps:
A. analyzing and processing the wire number connection information in the wire harness design drawing and storing the wire number connection information in the design matrix;
B. the system mainboard sends a detection command to each unit board, detects a dot matrix formed by pins and observes signal information of the dot matrix;
C. the unit board sequentially selects 1 pin X to apply a certain voltage to the pin X, and circularly scans and reads the voltage change condition of the rest pins;
D. converting the state signal {0,1} into digital information of the detection matrix, and calculating the digital information of the matrix and the design matrix to obtain a judgment matrix and judge the state of the wire harness.
2. The automotive harness conduction detection system according to claim 1, characterized in that: according to step A car pencil switches on detecting system and goes up including the host computer, serial ports data transmission channel, the cell board, by survey pencil data point and mainboard, the host computer issues the test command to next machine mainboard and cell board through serial ports data transmission channel, STM32 in the mainboard of next machine is through analytic serial ports command, sends different detection pulse waveform to the cell board, and the host computer carries out corresponding transform and operation to received data, shows the diagnostic result in real time on the interface to will show fault information and print through the printer, fix a position trouble pencil.
3. The automotive harness conduction detection system according to claim 1, characterized in that: the working process of the lower computer according to the step D
a. Firstly, the upper computer opens a serial port and a thread, scans the number of a detected wire harness by using a bar code gun, judges whether the wire harness is consistent with a system target wire harness or not, and starts to detect by the lower computer if the wire harness is consistent with the system target wire harness;
b. then, carrying out board card self-checking on the unit board and the main board, further judging whether the main board and the unit board are all electrified, and obtaining the number of the unit boards;
c. an STM32 chip in the mainboard sends a detection pulse to the cell board, and the cell board supplies power to a single test point through the HC595 chip at the rising edge of the detection pulse;
d. detecting the falling edge of the pulse, and collecting data of the rest n-1 test points by using HC 165; if the voltage data approximate to the test point exists, the voltage data is marked as conduction 1, otherwise, the voltage data is marked as 0, and the conduction 1 is marked, so that the conduction data generated when the unit board supplies power to other points subsequently is prevented from covering the conduction data. And the lower computer uploads the data stored by the STM32 to the upper computer.
4. The automotive harness conduction detection system according to claim 1, characterized in that: the working process of the upper computer according to the step D
a. The upper computer screens, filters, processes and judges the acquired data;
b. judging the state of the wiring harness at the moment, if the wiring harness is in a short-circuit fault, generating a red wire, if the wiring harness is in a broken circuit fault, generating a green wire, conducting, eliminating a corresponding connecting wire and a corresponding port, if the connecting wire, the air tightness and the locking information do not exist, successfully testing, if the canvas is not empty, unplugging and plugging the actual sheath again according to the position of the sheath on the canvas, which is broken circuit and short circuit, until the content of the canvas is not empty again, the wiring harness is in a fault, and if the information frame of the air tightness and the locking has data, the test bench has the problems of poor air tightness, incapability of working of;
c. and checking the fault information, selecting a printer to print a fault report and ending the test.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911282925.9A CN111025185A (en) | 2019-12-13 | 2019-12-13 | Automobile wire harness conduction detection system |
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| CN201911282925.9A CN111025185A (en) | 2019-12-13 | 2019-12-13 | Automobile wire harness conduction detection system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638473A (en) * | 2020-06-08 | 2020-09-08 | 西安西电光电缆有限责任公司 | Push rod cable integrated detection device and detection method thereof |
| CN112034388A (en) * | 2020-09-10 | 2020-12-04 | 安徽鸿创新能源动力有限公司 | Automatic wire harness detection system and detection method |
| CN112698244A (en) * | 2020-12-08 | 2021-04-23 | 丹阳众智信息科技有限公司 | Wire harness wireless detection system and method |
| CN113281631A (en) * | 2021-05-13 | 2021-08-20 | 南通友星线束有限公司 | On-line detection method for carrying diode in automobile wire harness |
| CN117420480A (en) * | 2023-08-08 | 2024-01-19 | 南京航空航天大学 | Method and system for testing line conductivity of high-capacity wire harness network |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937038A (en) * | 2009-07-02 | 2011-01-05 | 中国第一汽车集团公司无锡油泵油嘴研究所 | Intelligent multi-core cable harness detection device |
| CN201788247U (en) * | 2010-08-23 | 2011-04-06 | 青岛声达技术有限公司 | Device for detecting connection of time schedule controller and wiring harness |
| CN102156237A (en) * | 2011-03-08 | 2011-08-17 | 江苏大学 | Method and device for detecting automotive harnesses |
| CN102854432A (en) * | 2012-06-06 | 2013-01-02 | 浙江吉利汽车研究院有限公司杭州分公司 | Automotive wiring harness detection device |
| CN204789841U (en) * | 2015-05-21 | 2015-11-18 | 深圳市深展锐科技有限公司 | Cable tester |
| CN108957206A (en) * | 2018-07-19 | 2018-12-07 | 比克希汽车科技（合肥）有限公司 | A kind of efficient Beam Detector |
-
2019
- 2019-12-13 CN CN201911282925.9A patent/CN111025185A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101937038A (en) * | 2009-07-02 | 2011-01-05 | 中国第一汽车集团公司无锡油泵油嘴研究所 | Intelligent multi-core cable harness detection device |
| CN201788247U (en) * | 2010-08-23 | 2011-04-06 | 青岛声达技术有限公司 | Device for detecting connection of time schedule controller and wiring harness |
| CN102156237A (en) * | 2011-03-08 | 2011-08-17 | 江苏大学 | Method and device for detecting automotive harnesses |
| CN102854432A (en) * | 2012-06-06 | 2013-01-02 | 浙江吉利汽车研究院有限公司杭州分公司 | Automotive wiring harness detection device |
| CN204789841U (en) * | 2015-05-21 | 2015-11-18 | 深圳市深展锐科技有限公司 | Cable tester |
| CN108957206A (en) * | 2018-07-19 | 2018-12-07 | 比克希汽车科技（合肥）有限公司 | A kind of efficient Beam Detector |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111638473A (en) * | 2020-06-08 | 2020-09-08 | 西安西电光电缆有限责任公司 | Push rod cable integrated detection device and detection method thereof |
| CN111638473B (en) * | 2020-06-08 | 2022-11-01 | 西安西电光电缆有限责任公司 | Push rod cable integrated detection device and detection method thereof |
| CN112034388A (en) * | 2020-09-10 | 2020-12-04 | 安徽鸿创新能源动力有限公司 | Automatic wire harness detection system and detection method |
| CN112698244A (en) * | 2020-12-08 | 2021-04-23 | 丹阳众智信息科技有限公司 | Wire harness wireless detection system and method |
| CN113281631A (en) * | 2021-05-13 | 2021-08-20 | 南通友星线束有限公司 | On-line detection method for carrying diode in automobile wire harness |
| CN113281631B (en) * | 2021-05-13 | 2022-11-22 | 南通友星线束有限公司 | On-line detection method for carrying diode in automobile wire harness |
| CN117420480A (en) * | 2023-08-08 | 2024-01-19 | 南京航空航天大学 | Method and system for testing line conductivity of high-capacity wire harness network |
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Application publication date: 20200417 |