CN218068259U - Automobile wire harness short circuit detection device - Google Patents
Automobile wire harness short circuit detection device Download PDFInfo
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- CN218068259U CN218068259U CN202221969144.4U CN202221969144U CN218068259U CN 218068259 U CN218068259 U CN 218068259U CN 202221969144 U CN202221969144 U CN 202221969144U CN 218068259 U CN218068259 U CN 218068259U
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Abstract
The utility model provides a car wiring harness short circuit detection device, include: pulse voltage generating circuit, detection pincers, enameled wire winding and first LED pilot lamp. The jaw of the detection clamp is correspondingly arranged by two semicircular magnetic cores, the enameled wire winding is wound on the magnetic cores, and the enameled wire winding is electrically connected with the first LED indicating lamp. The input end of the pulse voltage generating circuit is connected with a first power line, the output end of the pulse voltage generating circuit is connected with a second power line, and the pulse voltage generating circuit is arranged in the jaw of the detection clamp. The utility model discloses can solve current car pencil short circuit and detect the problem that has not convenient, can improve convenience and the security that car pencil detected.
Description
Technical Field
The utility model relates to a car electrical detection's technical field especially relates to a car wiring harness short circuit detection device.
Background
In the use process of a vehicle, the short circuit of a power supply circuit of an electrical appliance caused by vibration, fixed loosening and the like often causes fuse and the function failure of an electrical component. And because whole car pencil is spread all over each corner, often can't judge fast to the short circuit position, need investigate with the help of appurtenance such as universal meter. Moreover, some electric components have smaller electric power, and share a power supply loop and a safety with other electric components, when the power supply loop is short-circuited, certain difficulty is brought to the examination, and the electric components under the same power supply loop need to be identified one by one. Therefore, how to detect the automobile wire harness quickly and conveniently has important significance.
SUMMERY OF THE UTILITY MODEL
The utility model provides a car wiring harness short circuit detection device solves current car wiring harness short circuit and detects the problem that has not convenient, can improve convenience and the security that car wiring harness detected.
In order to achieve the above purpose, the utility model provides the following technical scheme:
an automotive wiring harness short-circuit detection device comprising: the device comprises a pulse voltage generating circuit, detection pliers, an enameled wire winding and a first LED indicating lamp;
the jaw of the detection clamp is correspondingly arranged by two semicircular magnetic cores, the enameled wire winding is wound on the magnetic cores, and the enameled wire winding is electrically connected with the first LED indicator lamp;
the input end of the pulse voltage generating circuit is connected with a first power line, the output end of the pulse voltage generating circuit is connected with a second power line, and the pulse voltage generating circuit is arranged in a jaw of the detection clamp;
when the pulse voltage generating circuit is connected with two ends of a electrified wire harness to be detected through the first power line and the second power line, the detection clamp detects the electrified wire harness to be detected in a segmented mode according to pulse signals generated by the pulse voltage generating circuit, and the short-circuit position on the electrified wire harness is locked when the first LED indicating lamp is not turned on.
Preferably, the pulse voltage generating circuit includes: the LED driving circuit comprises a first triode, a second triode, a first capacitor, a light emitting diode, a first resistor, a second resistor and a third resistor;
the collector of the second triode is respectively connected with the input end of the light-emitting diode and one end of the first capacitor, the other end of the first capacitor is connected with the base electrode of the first triode, and the output end of the light-emitting diode is used as the output end of the pulse voltage generating circuit;
one end of the second resistor is connected with the base electrode of the second triode, the other end of the second resistor is respectively connected with the collector electrode of the first triode, one end of the first resistor and one end of the third resistor, the other end of the first resistor is connected with the emitting electrode of the second triode, and the other end of the third resistor is connected with the base electrode of the first triode.
Preferably, the pulse voltage generating circuit further includes: a protection resistor;
the input end of the protection resistor is used as the input end of the pulse voltage generating circuit, and the output end of the protection resistor is respectively connected with the other end of the first resistor and the emitting electrode of the second triode.
Preferably, the pulse voltage generating circuit further includes: a fuse;
one end of the fuse is connected with the output end of the protection resistor, and the other end of the fuse is respectively connected with the other end of the first resistor and the emitting electrode of the first triode.
Preferably, the detection clamp includes: the clamp comprises an upper clamp handle, a lower clamp handle, a first clamp body and a second clamp body;
the first clamp body is arranged at one end of the upper clamp handle, the second clamp body is arranged at one end of the lower clamp handle, and the upper clamp handle is hinged with the lower clamp handle in a crossed mode, so that the first clamp body and the second clamp body are correspondingly arranged to form an annular structure.
Preferably, the detection forceps further comprises: a spring;
one end of the spring is connected with the upper forceps handle, the other end of the spring is connected with the lower forceps handle, and the spring is used for generating tension and reset elasticity on the upper forceps handle and the lower forceps handle.
Preferably, the first clamp body and the second clamp body are both provided with magnetic cores.
Preferably, a circuit board mounting shell is arranged at the crossed hinged position of the upper clamp handle and the lower clamp handle, and the pulse voltage generating circuit and the first LED indicator lamp are arranged in the circuit board mounting shell.
Preferably, the wiring ends of the first power line and the second power line adopt a plug terminal structure.
The utility model provides an automobile wiring harness short circuit detection device adopts the interior pulse voltage generating circuit that is equipped with of keeping silent that detects pincers, it has the enameled wire winding to twine on keeping silent, the enameled wire winding is connected with first LED pilot lamp electricity, pulse voltage generating circuit meets with the electrical wiring harness both ends that await measuring, it is in to detect pincers short circuit position on the locking pencil when first LED pilot lamp is not bright. The problem of current car pencil short circuit detection exist not convenient is solved, the convenience and the security that can improve car pencil and detect.
Drawings
In order to more clearly illustrate the specific embodiments of the present invention, the drawings used in the embodiments will be briefly described below.
Fig. 1 is the utility model provides a pair of car wiring harness short circuit detection device schematic diagram.
Fig. 2 is a schematic diagram of a pulse voltage generating circuit provided by the present invention.
Detailed Description
In order to make those skilled in the art better understand the solution of the embodiments of the present invention, the embodiments of the present invention are further described in detail below with reference to the accompanying drawings and the implementation manner.
To the present problem that wastes time and energy that exists to the pencil detection in the car, the utility model provides a car pencil short circuit detection device solves current car pencil short circuit and detects the problem that exists not convenient, can improve convenience and the security that car pencil detected.
As shown in fig. 1 and 2, an automotive harness short circuit detection device includes: pulse voltage generating circuit 8, detection pincers, enameled wire winding 5 and first LED pilot lamp 6. The jaw of the detection clamp is correspondingly arranged by two semicircular magnetic cores, the enameled wire winding 5 is wound on the magnetic cores, and the enameled wire winding 5 is electrically connected with the first LED indicator lamp 6. The input end of the pulse voltage generating circuit 8 is connected with a first power line, the output end of the pulse voltage generating circuit 8 is connected with a second power line, and the pulse voltage generating circuit is arranged in the jaw of the detection clamp. When the pulse voltage generating circuit is connected with two ends of a electrified wire harness to be detected through the first power line and the second power line, the detection clamp detects the electrified wire harness to be detected in a segmented mode according to pulse signals generated by the pulse voltage generating circuit, and the short-circuit position on the electrified wire harness is locked when the first LED indicating lamp 6 is not turned on.
Specifically, the input end and the output end of the pulse voltage generating circuit are respectively connected with two ends of the electrified wire bundle to be detected, and when pulse voltage is generated in the pulse voltage generating circuit, a changing magnetic flux can be induced in a magnetic core of a jaw of the detection clamp. When the magnetic flux changes, induced current is generated in the enameled wire winding wound on the surface of the iron core, so that the first LED indicating lamp is driven to be turned on, and the fact that a short-circuit point does not exist in the electrified wire bundle to be tested is indicated. The detection clamp can adopt a segmentation method to select a certain point A in the loop, the detection device is clamped into the wire harness, and at the moment, if the first LED indicator lamp of the detection device continuously flashes, the detection device is positioned in the complete loop formed by the detection point and the short-circuit point, and the short-circuit point is behind the point A. Otherwise, the detection device has crossed the short-circuit point, no pulse current passes through the original electrical appliance, and the LED indicator light of the detection device is not on. And continuously adopting a segmentation method according to the detection result, continuously detecting the short-circuited loop segment, continuously reducing the detection range, and finally locking the short-circuit point.
As shown in fig. 2, the pulse voltage generating circuit includes: the circuit comprises a first triode Q1, a second triode Q2, a first capacitor C1, a light emitting diode D1, a first resistor R1, a second resistor R2 and a third resistor R3.
The collector of the second triode Q2 is respectively connected with the input end of the light-emitting diode D1 and one end of the first capacitor C1, the other end of the first capacitor C1 is connected with the base of the first triode Q1, and the output end of the light-emitting diode D1 is used as the output end of the pulse voltage generating circuit.
One end of the second resistor R2 is connected with the base of the second triode Q2, the other end of the second resistor R2 is respectively connected with the collector of the first triode Q1, one end of the first resistor R1 and one end of the third resistor R3, the other end of the first resistor R1 is connected with the emitter of the second triode Q2, and the other end of the third resistor R3 is connected with the base of the first triode Q1.
Further, the pulse voltage generating circuit further includes: protective resistor R in (ii) a The protective resistor R in As an input terminal of the pulse voltage generating circuit, the protection resistor R in The output end of the second triode Q2 is respectively connected with the other end of the first resistor R1 and the emitter of the second triode Q2.
Further, the pulse voltage generating circuit further includes: a fuse F;
one end of the fuse F and theProtective resistor R in The other end of the fuse F is respectively connected with the other end of the first resistor R1 and the emitter of the first triode Q1.
In one embodiment, as shown in fig. 2, when a power supply circuit of an electrical appliance of an automobile is short-circuited, the corresponding fused fuse is pulled out, and the signal generating device is connected to two ends of the short-circuited circuit. Wherein "Vin" is connected to the power supply side, R, of the circuit in The voltage dividing resistor is used as a voltage dividing resistor, fuse is a protection device of the pulse voltage generating device, and the 'GND' is connected to the electrical appliance side of the loop. After Vin is powered on, a voltage is applied to a base B of a second triode Q2 through a first resistor R1 and a second resistor R2, the second triode Q2 is conducted, a collector C outputs high, and a light-emitting diode D1 is lightened for about the charging time of a capacitor C. The Vin charges a first capacitor C1 through a first resistor R1 and a second resistor R2, because the voltage of the first capacitor C1 cannot change suddenly, when the voltage of a base electrode B of the first capacitor C1 rises to about 0.6V, a first triode Q1 is conducted, a base electrode B of a second triode Q2 is conducted to the ground, a second triode Q2 is turned off, no power supply is output from a collector C of the second triode Q2, and a light-emitting diode D1 is turned off. At this time, the third resistor R3 is short-circuited by the first triode Q1, the first capacitor C1 is no longer charged, the first capacitor C1 starts to discharge, and the first triode Q1 is kept on. When the voltage of the first capacitor C1 drops below 0.6V, the voltage applied to the base B of the first transistor Q1 is not sufficient to maintain the first transistor Q1 on, and the first transistor Q1 is turned off. After the first triode Q1 is turned off, the voltage "Vin" is continuously applied to the base B of the second triode Q2 through R1 and R2, and the second triode Q2 is turned on. The light emitting diode D1 is repeatedly flashed, and the flashing period can be adjusted by changing the resistance or the capacitance. The LED D1 is used as an indicator light for the work of the pulse voltage generating device, the color is green, and when Vin is connected to the electrical appliance side of the loop and GND is connected to the power supply side of the loop, the LED light does not work.
As shown in fig. 1, the detection jaw comprises: the forceps comprise an upper forceps handle 1, a lower forceps handle 2, a first forceps body 3 and a second forceps body 4. The clamp is characterized in that one end of the upper clamp handle 1 is provided with the first clamp body 3, one end of the lower clamp handle 2 is provided with the second clamp body 4, and the upper clamp handle 1 and the lower clamp handle 2 are hinged in a crossed mode, so that the first clamp body 3 and the second clamp body 4 are correspondingly arranged to form an annular structure.
Further, the detection forceps further comprise: a spring 7; one end of the spring 7 is connected with the upper clamp handle 1, the other end of the spring 7 is connected with the lower clamp handle 2, and the spring 7 is used for generating tension and reset elasticity for the upper clamp handle and the lower clamp handle.
Further, magnetic cores are arranged in the first clamp body and the second clamp body.
Further, a circuit board mounting shell (not shown in the figure) is arranged at the crossed hinged position of the upper clamp handle and the lower clamp handle, and the pulse voltage generating circuit and the first LED indicating lamp are arranged in the circuit board mounting shell.
Furthermore, the wiring ends of the first power line and the second power line adopt a plug terminal structure.
The pulse voltage generating circuit for short circuit detection can detect the short circuit point in an electromagnetic induction mode without damaging the original circuit structure, the outer binding of the wire harness does not need to be disassembled, the short circuit point of the automobile wire harness loop can be quickly and accurately positioned, and a large amount of process investigation time is saved.
It is visible, the utility model provides an automobile wiring harness short circuit detection device adopts the detection pincers to be equipped with pulse voltage generating circuit in keeping silent, it has the enameled wire winding to twine on keeping silent, the enameled wire winding is connected with a LED pilot lamp electricity, pulse voltage generating circuit meets with the electrical wiring harness both ends that await measuring, the detection pincers are in short circuit position on the locking pencil when first LED pilot lamp is not bright. The problem of current car pencil short circuit detection have not convenient is solved, convenience and security that can improve car pencil and detect.
The above detailed description of the structure, features and effects of the present invention has been made according to the embodiments shown in the drawings, and the above description is only the preferred embodiment of the present invention, but the present invention is not limited to the implementation range shown in the drawings, and all the modifications made according to the concepts of the present invention or equivalent embodiments modified to the same variations should be within the protection scope of the present invention when the spirit covered by the description and drawings is not exceeded.
Claims (9)
1. An automobile wiring harness short-circuit detection device, characterized by comprising: the device comprises a pulse voltage generating circuit, detection pliers, an enameled wire winding and a first LED indicating lamp;
the jaw of the detection clamp is correspondingly arranged by two semicircular magnetic cores, the enameled wire winding is wound on the magnetic cores, and the enameled wire winding is electrically connected with the first LED indicator lamp;
the input end of the pulse voltage generating circuit is connected with a first power line, the output end of the pulse voltage generating circuit is connected with a second power line, and the pulse voltage generating circuit is arranged in a jaw of the detection clamp;
when the pulse voltage generating circuit is connected with two ends of a electrified wire harness to be detected through the first power line and the second power line, the detection clamp detects the electrified wire harness to be detected in a segmented mode according to pulse signals generated by the pulse voltage generating circuit, and the short-circuit position on the electrified wire harness is locked when the first LED indicating lamp is not turned on.
2. The automotive harness short-circuit detection device according to claim 1, wherein the pulse voltage generation circuit includes: the LED driving circuit comprises a first triode, a second triode, a first capacitor, a light emitting diode, a first resistor, a second resistor and a third resistor;
the collector of the second triode is respectively connected with the input end of the light-emitting diode and one end of the first capacitor, the other end of the first capacitor is connected with the base electrode of the first triode, and the output end of the light-emitting diode is used as the output end of the pulse voltage generating circuit;
one end of the second resistor is connected with the base electrode of the second triode, the other end of the second resistor is respectively connected with the collector electrode of the first triode, one end of the first resistor and one end of the third resistor, the other end of the first resistor is connected with the emitting electrode of the second triode, and the other end of the third resistor is connected with the base electrode of the first triode.
3. The automotive harness short-circuit detection device according to claim 2, wherein the pulse voltage generation circuit further comprises: a protection resistor;
the input end of the protection resistor is used as the input end of the pulse voltage generating circuit, and the output end of the protection resistor is respectively connected with the other end of the first resistor and the emitting electrode of the second triode.
4. The automotive harness short-circuit detection device according to claim 3, wherein the pulse voltage generation circuit further comprises: a fuse;
one end of the fuse is connected with the output end of the protection resistor, and the other end of the fuse is respectively connected with the other end of the first resistor and the emitting electrode of the first triode.
5. The automotive harness short circuit detection device according to claim 4, wherein the detection clamp comprises: the clamp comprises an upper clamp handle, a lower clamp handle, a first clamp body and a second clamp body;
the first clamp body is arranged at one end of the upper clamp handle, the second clamp body is arranged at one end of the lower clamp handle, and the upper clamp handle is hinged with the lower clamp handle in a crossed mode, so that the first clamp body and the second clamp body are correspondingly arranged to form an annular structure.
6. The automotive harness short circuit detection device of claim 5, wherein the detection clamp further comprises: a spring;
one end of the spring is connected with the upper clamp handle, the other end of the spring is connected with the lower clamp handle, and the spring is used for generating tension and reset elasticity for the upper clamp handle and the lower clamp handle.
7. The automotive wiring harness short-circuit detection device according to claim 6, wherein a magnetic core is provided in each of the first and second clamp bodies.
8. The automotive wiring harness short-circuit detection device according to claim 7, wherein a circuit board mounting housing is provided at a crossing hinge of the upper clamp handle and the lower clamp handle, and the pulse voltage generation circuit and the first LED indicator lamp are provided in the circuit board mounting housing.
9. The automotive wiring harness short-circuit detection device according to claim 8, wherein the terminals of the first power line and the second power line are of a plug-in terminal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221969144.4U CN218068259U (en) | 2022-07-28 | 2022-07-28 | Automobile wire harness short circuit detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221969144.4U CN218068259U (en) | 2022-07-28 | 2022-07-28 | Automobile wire harness short circuit detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218068259U true CN218068259U (en) | 2022-12-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221969144.4U Active CN218068259U (en) | 2022-07-28 | 2022-07-28 | Automobile wire harness short circuit detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218068259U (en) |
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2022
- 2022-07-28 CN CN202221969144.4U patent/CN218068259U/en active Active
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