CN2239627Y - Automotive circuit short-circuit detector - Google Patents
Automotive circuit short-circuit detector Download PDFInfo
- Publication number
- CN2239627Y CN2239627Y CN 95219351 CN95219351U CN2239627Y CN 2239627 Y CN2239627 Y CN 2239627Y CN 95219351 CN95219351 CN 95219351 CN 95219351 U CN95219351 U CN 95219351U CN 2239627 Y CN2239627 Y CN 2239627Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- signal
- relay
- signal receiver
- signal generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model discloses an automotive circuit short-circuit detector. A signal generator is composed of a general purpose relay J and an automotive lamp D, the power of which is bigger than 25W. A coil of the relay J is connected with the automotive lamp D in series after the coil of the relay is connected with a group of normally open contacts JK in parallel. The signal generator is provided with a sound-producing device Y and an indicator light LED 1 which belong to the display devices of signal output. The utility model has the advantages of simple structure, high operational reliability, strong signal, high measuring accuracy, high thickness-measuring accuracy and good interference resistance. In addition, the utility model has the good adaptability for detecting environment.
Description
The utility model relates to a kind of automobile circuit short circuit detector, belongs to electric pulse and produces and receiving trap.
Chinese patent CN93230262.9 discloses a kind of " automobile line short trouble somascope ", is made up of signal generator and signal receiver, can track to the automobile circuit short circuit and look for a little.But the signal generator of this somascope adopts high power transistor as on-off element, and cost height, and overload is damaged easily is that automobile circuit working time of 24 volts can not be long for voltage especially.Signal receiver is made up of coil and earphone, lacks the anti-dried ability of scratching, a little less than the detection signal.
The purpose of this utility model provide a kind of simple in structure, functional reliability is high, signal is strong, have the automobile circuit short circuit detector of the good anti-dried ability of scratching.
The signal generator that the purpose of this utility model is achieved in that it by the automobile general-purpose relay and＞auto lamp of 25W constitutes, after the coil of relay and the parallel connection of one group normally opened contact with have current limliting and connect with the auto lamp of indicating double action.Two lead-in wires of signal generator are series in the circuit of automobile circuit generation short circuit, its relay normally open contact is constantly closed, disconnection, produce the pulse direct current electric current, make signal generator send pulse electromagnetic wave around the lead between the short circuit point, the signal receiver that has sound-producing device and two kinds of signal output display devices of pilot lamp is along the detection of moving towards of sending the pulse electromagnetic wave signal.Because no pulse electromagnetic wave after the short dot utilizes the disappearance that signal shows on the signal receiver, detects short dot.
Description of drawings.
Fig. 1 is the circuit theory diagrams of the utility model automobile circuit short circuit detector signal generator.
Fig. 2 is the circuit theory diagrams of the utility model automobile circuit short circuit detector signal receiver.
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
Signal generator shown in Figure 1 is made of the auto lamp D of automobile general-purpose relay J and 35W, the coil of relay J and one group normally opened contact J
KAfter the parallel connection, connect with auto lamp D with work demonstration and current limliting double action.When short circuit occurring, with two lead-in wire A of signal generator
1, A
2Be series at circuit and produce in the circuit of short circuit, be conveniently the fuse position that is connected in because of circuit fusing.The normally opened contact J of relay J
KConstantly closed, disconnection, auto lamp D is secretly bright, and signal generator produces the pulse direct current electric current to the circuit between the short circuit point, make its lead send pulse electromagnetic wave on every side.
Signal receiver as shown in Figure 2, the low-frequency pulse inductor T that constitutes by ferromagnetic core and coil
1With the capacitor C that strobes
1Compose in parallel low frequency and receive head.One end and power supply link, and the other end is an output terminal, output inductor T
1The alternating electromotive force that produces because of induction is through capacitance C
2, input is by BG
1, BG
2, R
1The amplifying circuit of forming is at complex pipe BG
1, BG
2Collector on export.Via capacitance C
3With by R
2, R
3, R
4, BG
3Convert BG to behind the steady operation dot circuit of forming
3Output on the collector.This output is through capacitance C
4, input is by D
1, R
5, R
6, R
7, R
8, BG
4Small-signal filtering and the power amplifier formed are by BG
4Collector output, thereby make transformer T
2Work drives sound-producing device Y work.
BG
3Output on the collector is simultaneously through capacitance C
5, input is by R
11, BG
5, D
2, C
6, BG
6Another small-signal filtering and power amplifier of forming are by BG
6Collector output, drive pilot lamp group LED
1Work.The resistance R of connecting with pilot lamp
10Play metering function.
Power switch circuit is by source E, K switch, LED
2, current-limiting resistance R
9With filter capacitor C
7Form LED
2Play the display power supply state of having devoted oneself to work.
When signal receiver moved along the circuit of signal generator between short dot, signal receiver just can receive the pulse electromagnetic wave signal that lead sends, thus sound-producing device Y sounding, pilot lamp group LED
1Bright.Because no pulse electromagnetic wave behind the short dot when disappearance place of above-mentioned sound and optic signal, can be judged as the short dot of circuit.
The advantage that the utility model compared with prior art has is: signal generator Simple in structure, overload capacity is strong, reliable operation. Because its signal generator sends Signal strong, increased the Thickness Measurement by Microwave of signal receiver and the accuracy of measurement. Signal Receiver adopts the low frequency Receiver, is difficult for producing harmonic wave; The small-signal filtering function makes it Having good resisting does flexible; Aobvious with sound-producing device and two kinds of signal outputs of indicator lamp Show, to the strong adaptability of testing environment.
Claims (3)
1. an automobile circuit short circuit detector is made up of signal generator and signal receiver two parts, it is characterized in that: signal generator by automobile general-purpose relay J and＞the auto lamp D of 25W constitutes the coil of relay J and one group normally opened contact J
KConnect with auto lamp D in back in parallel; Signal receiver has sound-producing device Y and pilot lamp LED
1Two kinds of signal output display devices.
2. detecting device according to claim 1, the reception head that it is characterized in that described signal receiver are the low-frequency pulse inductor T that is made of ferromagnetic core and coil
1With the capacitor C that strobes
1The low frequency that composes in parallel receives head.
3. detecting device according to claim 1 and 2 is characterized in that described signal receiver low frequency receives an end of head through capacitor C
2Be connected in by BG
1, BG
2, R
1The amplifying circuit of forming, complex pipe BG
1, BG
2Current collection output terminal very, behind the stabilization of operating point circuit, drive pronunciation device Y and pilot lamp LDE with being respectively applied for
1By D
1, R
5, R
6, R
7, R
8, BG
4That forms reaches by R
11, BG
5, D
2, C
6, BG
6The small-signal filtering of forming and the input end of power amplifier link to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95219351 CN2239627Y (en) | 1995-08-22 | 1995-08-22 | Automotive circuit short-circuit detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95219351 CN2239627Y (en) | 1995-08-22 | 1995-08-22 | Automotive circuit short-circuit detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2239627Y true CN2239627Y (en) | 1996-11-06 |
Family
ID=33867575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95219351 Expired - Fee Related CN2239627Y (en) | 1995-08-22 | 1995-08-22 | Automotive circuit short-circuit detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2239627Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698342A (en) * | 2016-03-31 | 2016-06-22 | 广东美的制冷设备有限公司 | Fault judgment circuit and method of four-way valve of air-conditioner and air-conditioner |
-
1995
- 1995-08-22 CN CN 95219351 patent/CN2239627Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698342A (en) * | 2016-03-31 | 2016-06-22 | 广东美的制冷设备有限公司 | Fault judgment circuit and method of four-way valve of air-conditioner and air-conditioner |
| CN105698342B (en) * | 2016-03-31 | 2018-07-10 | 广东美的制冷设备有限公司 | Failure determinating circuit, method and the air conditioner of air conditioner four-way valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |