CN212872854U - Automobile wire harness detection device - Google Patents
Automobile wire harness detection device Download PDFInfo
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- CN212872854U CN212872854U CN202021459466.5U CN202021459466U CN212872854U CN 212872854 U CN212872854 U CN 212872854U CN 202021459466 U CN202021459466 U CN 202021459466U CN 212872854 U CN212872854 U CN 212872854U
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Abstract
The utility model discloses an automobile wire harness detection device, which comprises a workbench, wherein a wire harness plug port is arranged on the workbench, a detection control unit is arranged in the workbench, the detection control unit comprises a pressurizing assembly, a controller and a voltage detection circuit, the pressurizing assembly comprises a test power supply and an electronic switch, the controller is switched on by switching different contacts of the electronic switch so as to realize automatic measurement of the wire harness, manual switching is avoided, and the detection speed is greatly improved; the sensor J1 measures the voltage of the terminal point of the wire harness in real time, and sends the detection signal into the voltage detection circuit for processing, so that the accuracy of the detection signal is improved, and meanwhile, the A/D converter and the controller are well protected; the controller compares the measured value with the set value, so that whether the wire harness detection meets the index requirement is judged, the detection result is accurate and effective, and the wire harness detection device has good use value.
Description
Technical Field
The utility model relates to a pencil detects technical field, especially relates to an automobile wire harness detection device.
Background
The automobile control circuit network is an important component of automobile safety, the automobile wire harness is a basic part of the automobile control circuit network, and a system capable of correctly detecting whether the automobile wire harness is normal or not to guarantee the safety of an automobile becomes a subject worthy of research. Nowadays, automobile wire harness detection devices in the automobile industry in China are low in price, but have many defects in speed, accuracy and high efficiency. For example, in the data acquisition stage of automobile wire harness detection, the detection signal of the sensor is interfered by external noise, so that additional errors occur in the detection result, and the safety performance in the wire harness detection process is still to be improved.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, an object of the present invention is to provide an automobile wire harness detection device.
The technical scheme for solving the problem is as follows: an automobile wire harness detection device comprises a workbench, wherein a wire harness plug-in port is arranged on the workbench, a detection control unit is arranged in the workbench and comprises a pressurizing assembly, a controller and a voltage detection circuit, the control end of the pressurizing assembly is connected with the output end of the controller, and the output end of the voltage detection circuit is connected with the input end of the controller; the voltage detection circuit comprises a sensor for measuring the voltage of the wire harness endpoint, detection signals of the sensor are subjected to RC filtering and then sent to a second-order band-pass filter for frequency-selective filtering, then are subjected to voltage buffering and clamping protection processing and then sent to an A/D converter to be converted into digital quantity, and finally sent to a controller to calculate the measured value of the wire harness endpoint voltage.
Preferably, the pressurizing assembly includes a test power supply and an electronic switch for switching a conduction state of the wire harness with the test power supply.
Preferably, the voltage detection circuit includes a resistor R1, one end of the resistor R1 is connected to the signal output terminal of the sensor, the other end of the resistor R1 is grounded through a capacitor C1, the other end of the resistor R2 is connected to the resistor R3, the other end of the resistor R3 at one end of the capacitor C2 is connected to the non-inverting input terminal of the operational amplifier AR1 and is grounded through a capacitor C3, the inverting input terminal of the operational amplifier AR1 is connected to one end of the resistors R4 and R5, the other end of the resistor R4 is grounded, and the other ends of the capacitor C2 and the resistor R5 are connected to the output terminal of the operational amplifier AR 1.
Preferably, the voltage detection circuit further comprises a resistor R6 and a capacitor C4, one end of the resistor R6 and one end of the capacitor C4 are connected to the output end of the operational amplifier AR1, the other end of the resistor R6 and the other end of the capacitor C4 are grounded through a rheostat RP1, and are connected to the anode of the diode VD2, the cathode of the diode VD3 and one end of the resistor R7 through the diode VD1, the cathode of the diode VD2 is connected to the +5V power supply, the other end of the diode VD3 is grounded, and the other end of the resistor R7 is connected to the a/D converter and is grounded through the capacitor C5.
Preferably, the sensor is a space wave CHV-25P type voltage Hall sensor.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the detection signal of the sensor J1 is firstly sent into RC filtering for noise reduction, and then the low-pass frequency-selecting filtering is carried out on the signal after the RC filtering by utilizing the principle of a band-pass filter, so that the noise interference caused by external high-frequency clutter is effectively eliminated, and the accuracy of the detection result is improved;
2. the voltage detection circuit buffers an output signal of the operational amplifier AR1 by using an RC buffer circuit principle, and then clamps the potential value of the output signal within the range of 0-5V by using a diode clamping circuit principle to output, thereby playing a good protection role on a rear-stage circuit chip;
3. thereby the controller switches on through the different contacts of switching electronic switch and realizes the automatic measure to the pencil, avoids artifical switching, has promoted detection speed greatly.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
The foregoing and other technical and scientific aspects, features and advantages of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings of fig. 1-2. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
As shown in figure 1, an automobile wiring harness detection device comprises a workbench 1, wherein a plurality of types of wiring harness insertion ports 2 are arranged on the workbench 1, so that the automobile wiring harness detection device is adaptive to different automobile wiring harnesses and is wider in application range. The inside detection control unit that sets up of workstation, detection control unit include pressurization subassembly, controller and voltage detection circuit, and the control end connection controller's of pressurization subassembly output, voltage detection circuit's output connection controller's input. The pressurizing assembly comprises a test power supply and an electronic switch, and the electronic switch is used for switching the conduction state of the wiring harness and the test power supply.
As shown in fig. 2, the voltage detection circuit includes a sensor J1 for measuring the voltage of the terminal of the wire harness, and particularly, a type-eight-wave CHV-25P voltage hall sensor is used. The sensor works on the principle of Hall magnetic compensation, in order to avoid interference of external clutter on detection, a detection signal of a sensor J1 is subjected to RC filtering and then sent into a second-order band-pass filter for frequency-selective filtering, then is subjected to voltage buffering and clamping protection processing and then sent into an A/D converter to be converted into digital quantity, and finally is sent into a controller to calculate a wire harness endpoint voltage measurement value.
The specific structure of the voltage detection circuit comprises a resistor R1, one end of a resistor R1 is connected with a signal output end of the sensor, the other end of a resistor R1 is grounded through a capacitor C1, the other end of the resistor R3 is connected with a resistor R3 and a capacitor C2 through a resistor R2, the non-inverting input end of an operational amplifier AR1 is grounded through a capacitor C3, the inverting input end of the operational amplifier AR1 is connected with one ends of the resistors R4 and R5, the other end of the resistor R4 is grounded, and the other ends of the capacitor C2 and the resistor R5 are connected with the output end of the operational amplifier AR 1. The detection signal of the sensor J1 is firstly sent into RC filtering formed by a resistor R1 and a capacitor C1 for noise reduction, then an operational amplifier AR1 and peripheral resistance-capacitance elements R2, R3, C2 and C3 form a second-order band-pass filter, the signal after the RC filtering is subjected to low-pass frequency-selective filtering by utilizing the principle of the band-pass filter, noise interference caused by external high-frequency noise is effectively eliminated, and the accuracy of the detection result is improved.
The voltage detection circuit further comprises a resistor R6 and a capacitor C4, one end of the resistor R6 and one end of the capacitor C4 are connected with the output end of the operational amplifier AR1, the other ends of the resistor R6 and the capacitor C4 are grounded through a rheostat RP1, the other ends of the resistor R1 are connected with the anode of a diode VD2, the cathode of the diode VD3 and one end of a resistor R7, the cathode of the diode VD2 is connected with a +5V power supply, the other end of the diode VD3 is grounded, and the other end of the resistor R7 is connected with an A/D converter and is grounded through a capacitor C5.
Due to the problems of the performance reduction of the sheath of the wire harness, the insufficient insulation between welding spots and the like, in the process of detecting the voltage resistance of the wire harness, the high voltage applied to two ends of the wire harness probably causes the short circuit and overcurrent in the detection, so that the current in a voltage detection circuit is overlarge and the chip in the circuit is damaged. Therefore, in the voltage detection circuit, an RC buffer circuit formed by the resistor R6, the capacitor C4 and the varistor RP1 buffers the output signal of the operational amplifier AR 1. Meanwhile, the diodes VD1, VD2 and the +5V power supply form a diode clamping circuit to clamp the potential value of the output signal within the range of 0-5V for output, and the protection effect on the rear-stage circuit chip is good.
The utility model discloses when specifically using, at first peg graft the car pencil on the pencil interface that corresponds, then the start detects, and the controller sends control command this moment and makes electronic switch's contact switch on in proper order, and test power applys certain voltage or electric current to the pencil that needs the test in proper order promptly, and the switch contact on all the other pencil does not switch on. Thereby the controller switches on through the different contacts of switching electronic switch and realizes the automatic measure to the pencil, avoids artifical switching, has promoted detection speed greatly. The sensor J1 measures the voltage of the terminal of the wire harness in real time, sends the detection signal into the voltage detection circuit for processing, improves the accuracy of the detection signal, and plays a good role in protecting the A/D converter and the controller. The controller compares the measured value with the set value, so that whether the wire harness detection meets the index requirement is judged, the detection result is accurate and effective, and the wire harness detection device has good use value.
The above description is provided for further details of the present invention with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (5)
1. The utility model provides a car wiring harness detection device, includes the workstation, sets up the pencil interface on the workstation, and the workstation is inside to set up detection control unit, its characterized in that: the detection control unit comprises a pressurizing assembly, a controller and a voltage detection circuit, wherein the control end of the pressurizing assembly is connected with the output end of the controller, and the output end of the voltage detection circuit is connected with the input end of the controller;
the voltage detection circuit comprises a sensor for measuring the voltage of the wire harness endpoint, detection signals of the sensor are subjected to RC filtering and then sent to a second-order band-pass filter for frequency-selective filtering, then are subjected to voltage buffering and clamping protection processing and then sent to an A/D converter to be converted into digital quantity, and finally sent to a controller to calculate the measured value of the wire harness endpoint voltage.
2. The automotive wire harness detection device according to claim 1, characterized in that: the pressurizing assembly comprises a test power supply and an electronic switch, and the electronic switch is used for switching the conduction state of the wiring harness and the test power supply.
3. The automotive wire harness detection device according to claim 2, characterized in that: the voltage detection circuit comprises a resistor R1, one end of a resistor R1 is connected with a signal output end of the sensor, the other end of a resistor R1 is grounded through a capacitor C1, the other end of the resistor R3 is connected with a resistor R3 and a capacitor C2 through a resistor R2, the non-inverting input end of an operational amplifier AR1 is grounded through a capacitor C3, the inverting input end of the operational amplifier AR1 is connected with one end of the resistors R4 and R5, the other end of the resistor R4 is grounded, and the other ends of the capacitor C2 and the resistor R5 are connected with the output end of the operational amplifier AR 1.
4. The automotive wire harness detection device according to claim 3, characterized in that: the voltage detection circuit further comprises a resistor R6 and a capacitor C4, one end of the resistor R6 and one end of the capacitor C4 are connected with the output end of the operational amplifier AR1, the other ends of the resistor R6 and the capacitor C4 are grounded through a rheostat RP1, the other ends of the resistor R1 are connected with the anode of a diode VD2, the cathode of the diode VD3 and one end of a resistor R7, the cathode of the diode VD2 is connected with a +5V power supply, the other end of the diode VD3 is grounded, and the other end of the resistor R7 is connected with the A/D converter and is grounded through a capacitor C5.
5. The automotive wire harness detection device according to claim 1, characterized in that: the sensor is a space wave CHV-25P type voltage Hall sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021459466.5U CN212872854U (en) | 2020-07-22 | 2020-07-22 | Automobile wire harness detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021459466.5U CN212872854U (en) | 2020-07-22 | 2020-07-22 | Automobile wire harness detection device |
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| Publication Number | Publication Date |
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| CN212872854U true CN212872854U (en) | 2021-04-02 |
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| CN202021459466.5U Active CN212872854U (en) | 2020-07-22 | 2020-07-22 | Automobile wire harness detection device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138319A (en) * | 2021-04-29 | 2021-07-20 | 黄冈格罗夫氢能汽车有限公司 | Hydrogen fuel automobile wire harness loading detection system, circuit and method |
| CN114325482A (en) * | 2021-12-31 | 2022-04-12 | 江苏华凯比克希线束有限公司 | Method for efficiently detecting automobile wire harness conduction |
| CN116580524A (en) * | 2023-07-11 | 2023-08-11 | 深圳市誉铭旺电子股份有限公司 | Alarm device for processing wire harness of new energy vehicle |
-
2020
- 2020-07-22 CN CN202021459466.5U patent/CN212872854U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113138319A (en) * | 2021-04-29 | 2021-07-20 | 黄冈格罗夫氢能汽车有限公司 | Hydrogen fuel automobile wire harness loading detection system, circuit and method |
| CN114325482A (en) * | 2021-12-31 | 2022-04-12 | 江苏华凯比克希线束有限公司 | Method for efficiently detecting automobile wire harness conduction |
| CN116580524A (en) * | 2023-07-11 | 2023-08-11 | 深圳市誉铭旺电子股份有限公司 | Alarm device for processing wire harness of new energy vehicle |
| CN116580524B (en) * | 2023-07-11 | 2023-09-12 | 深圳市誉铭旺电子股份有限公司 | Alarm device for processing wire harness of new energy vehicle |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder |
Address after: 458000 No.9, Wenming Road, Jinshan Industrial Zone, Qibin District, Hebi City, Henan Province Patentee after: Hebi Yongsheng Instrument Electric Appliance Co.,Ltd. Address before: 458000 area C of standard workshop in Jinshan Industrial Zone, Qibin District, Hebi City, Henan Province Patentee before: Hebi Yongsheng Instrument Electric Appliance Co.,Ltd. |
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| CP02 | Change in the address of a patent holder |