CN203811746U - Cable break detector - Google Patents
Cable break detector Download PDFInfo
- Publication number
- CN203811746U CN203811746U CN201420069163.0U CN201420069163U CN203811746U CN 203811746 U CN203811746 U CN 203811746U CN 201420069163 U CN201420069163 U CN 201420069163U CN 203811746 U CN203811746 U CN 203811746U
- Authority
- CN
- China
- Prior art keywords
- lead wire
- connecting lead
- cable
- output
- pass filter
- 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
Links
Abstract
The utility model discloses a cable break detector including an audio oscillator, a buffer, a high-pass filter, an output amplifier and an earphone. A signal output terminal of the audio oscillator is connected with a start connecting lead wire for connection with a start measuring point of a to-be-measured cable. A signal input terminal of the buffer is connected with an end connecting lead wire for connection with an end measuring point of the to-be-measured cable. A signal output terminal of the buffer is connected to a signal input terminal of the high-pass filter. A signal output terminal of the high-pass filter is connected to a signal input terminal of the output amplifier. A signal output terminal of the output amplifier is connected to the earphone. The detector can effectively detect the location of a cable break in time and is improved in accuracy and efficiency of detection.
Description
Technical field
The utility model relates to a kind of cable breakage place detector.
Background technology
At present, the method for the detection streamer breaking part of prior art is as follows: the first step, two not disconnected lines, wherein connects an electrical appliance (live wire), and another root nothing does not connect, and having broken, that also connects live wire (need not connect electrical appliance).Second step is clipped in cable with pincers type reometer (current gear) and walks from the beginning to the end outward, and table shows does not have electric current, when going to broken string position reometer echo, is shown with electric current, and this method detects loaded down with trivial details, is easily subject to extraneous interference, the accuracy that impact detects.
Summary of the invention
Technical problem to be solved in the utility model is the defect that overcomes prior art, and a kind of cable breakage place detector is provided, and it is the fracture position of detection streamer timely and effectively, has improved the accuracy and the detection efficiency that detect.
In order to solve the problems of the technologies described above, the technical solution of the utility model is: a kind of cable breakage place detector, it comprises audio frequency oscillator, impact damper, Hi-pass filter, output amplifier and earphone, on the signal output part of audio frequency oscillator, be connected with for connecting the initial connecting lead wire of the initial measuring point of tested cable, on the signal input part of impact damper, be connected with the termination connecting lead wire that stops measuring point for connecting tested cable, the signal output part of impact damper is connected with the signal input part of Hi-pass filter, the signal output part of Hi-pass filter is connected with the signal input part of output amplifier, the signal output part of output amplifier is connected with earphone.
Further, described audio frequency oscillator is comprised of NE555 time-base integrated circuit and peripheral circuit thereof.
Further, described impact damper is comprised of the mono-operation amplifier integrated circuit of LF351 and peripheral circuit thereof.
Further, described Hi-pass filter is comprised of the two operation amplifier integrated circuit of LF353 and peripheral circuit thereof.
Further, described output amplifier is comprised of the two operation amplifier integrated circuit of LF353 and peripheral circuit thereof.
Further, on described audio frequency oscillator, be provided with output audio socket, input audio jack is equipped with in one end of described initial connecting lead wire, and one end of described initial connecting lead wire is connected on audio frequency oscillator by the grafting of input audio jack and output audio socket.
Further, on described impact damper, be provided with input audio socket, output audio plug is equipped with in one end of described termination connecting lead wire, and one end of described termination connecting lead wire is connected on impact damper by the grafting of output audio plug and input audio socket.
Adopted after technique scheme, one end of the initial connecting lead wire of signal feed-in that audio frequency oscillator produces, the other end of initial connecting lead wire has Small clamp and is connected with tested cable, stopping connecting lead wire is one section of shielded wire, it has a bit of wired tube, one end is peelled off screen layer and is connected with tested cable, so, stopping forming a small amount of electric capacity between one end of connecting lead wire and cable under test, be enough to a small amount of voice signal to be coupled to detector, under the frequency of operation of audio frequency oscillator, impedance between from cable under test to detector is very high, therefore at the impact damper that adopts high impedance, produce the input impedance of 10M ohm, the high sensitivity of circuit makes detector be subject to the impact of 50HZ AC hum, therefore, with Hi-pass filter, weaken the signal lower than 1KHZ, at 50HZ, produce the decay of 80dB, thereby improve the sensitivity of detecting device, just can use earphone judged result, during use, stop the tip of connecting lead wire along tested cable moving, one end of first injecting from sound signal, initially signal is very strong, when arriving certain some blackout, this point had been both the fracture position of tested cable, the fracture position of detection streamer timely and effectively so just, the accuracy and the detection efficiency that detect have been improved.
Accompanying drawing explanation
Fig. 1 is the theory diagram of cable breakage of the present utility model place detector;
Fig. 2 is the circuit connection diagram of cable breakage of the present utility model place detector.
Embodiment
For content of the present utility model is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the utility model is described in further detail below.
As shown in Figure 1 and 2, a kind of cable breakage place detector, it comprises audio frequency oscillator, impact damper, Hi-pass filter, output amplifier and earphone, on the signal output part of audio frequency oscillator, be connected with for connecting the initial connecting lead wire of the initial measuring point of tested cable, on the signal input part of impact damper, be connected with the termination connecting lead wire that stops measuring point for connecting tested cable, the signal output part of impact damper is connected with the signal input part of Hi-pass filter, the signal output part of Hi-pass filter is connected with the signal input part of output amplifier, the signal output part of output amplifier is connected with earphone.
As shown in Figure 2, audio frequency oscillator is comprised of NE555 time-base integrated circuit (being the IC1 in Fig. 2) and peripheral circuit thereof, and its produces the square wave of typical frequencies, and the R3 in Fig. 2 is protective resistance, its metering function of having connected with output signal.
Impact damper is comprised of the mono-operation amplifier integrated circuit of LF351 (being the IC2 in Fig. 2) and peripheral circuit thereof.IC2 is the non-inverting buffer of detector, and by input bias resistance, R6 is transferred to 10M ohm its input impedance.
Hi-pass filter is comprised of the two operation amplifier integrated circuit (being the IC3-1 in Fig. 2) of LF353 and peripheral circuit thereof.The cutoff frequency of Hi-pass filter is approximately 1KHZ, so test signal does not produce significant decay, it produces huge decay to the frequency of 50HZ.
Output amplifier is comprised of the two operation amplifier integrated circuit (being the IC3-2 in Fig. 2) of LF353 and peripheral circuit thereof.It is an in-phase amplification circuit, by R12 and R13 electric resistance partial pressure, the voltage gain of this amplifying circuit is transferred to just below 50, C9 is for the 7 pin output signals of IC3-2 are coupled to earphone socket XSP, then plugged earphone is in order to monitor the size of Injection Signal, with the position of failure judgement.
On audio frequency oscillator, be provided with output audio socket, input audio jack is equipped with in one end of described initial connecting lead wire, and one end of described initial connecting lead wire is connected on audio frequency oscillator by the grafting of input audio jack and output audio socket.
On described impact damper, be provided with input audio socket, output audio plug is equipped with in one end of described termination connecting lead wire, and one end of described termination connecting lead wire is connected on impact damper by the grafting of output audio plug and input audio socket.Whole circuit adopts printed circuit board (PCB) welding, can guarantee that like this degree of accuracy is higher, and external packing adopts can, can shield the interference that contributes to reduce backdrop and other clutters to detector.
Principle of work of the present utility model is as follows:
One end of the initial connecting lead wire of signal feed-in that audio frequency oscillator produces, the other end of initial connecting lead wire has Small clamp and is connected with tested cable, stopping connecting lead wire is one section of shielded wire, it has a bit of wired tube, one end is peelled off screen layer and is connected with tested cable, so, stopping forming a small amount of electric capacity between one end of connecting lead wire and cable under test, be enough to a small amount of voice signal to be coupled to detector, under the frequency of operation of audio frequency oscillator, impedance between from cable under test to detector is very high, therefore at the impact damper that adopts high impedance, produce the input impedance of 10M ohm, the high sensitivity of circuit makes detector be subject to the impact of 50HZ AC hum, therefore, with Hi-pass filter, weaken the signal lower than 1KHZ, at 50HZ, produce the decay of 80dB, thereby improve the sensitivity of detecting device, just can use earphone judged result, during use, stop the tip of connecting lead wire along tested cable moving, one end of first injecting from sound signal, initially signal is very strong, when arriving certain some blackout, this point had been both the fracture position of tested cable, the fracture position of detection streamer timely and effectively so just, the accuracy and the detection efficiency that detect have been improved.
Above-described specific embodiment; technical matters, technical scheme and beneficial effect that the utility model is solved further describe; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (7)
1. a cable breakage place detector, it is characterized in that: it comprises audio frequency oscillator, impact damper, Hi-pass filter, output amplifier and earphone, on the signal output part of audio frequency oscillator, be connected with for connecting the initial connecting lead wire of the initial measuring point of tested cable, on the signal input part of impact damper, be connected with the termination connecting lead wire that stops measuring point for connecting tested cable, the signal output part of impact damper is connected with the signal input part of Hi-pass filter, the signal output part of Hi-pass filter is connected with the signal input part of output amplifier, the signal output part of output amplifier is connected with earphone.
2. cable breakage according to claim 1 place detector, is characterized in that: described audio frequency oscillator is comprised of NE555 time-base integrated circuit and peripheral circuit thereof.
3. cable breakage according to claim 1 place detector, is characterized in that: described impact damper is comprised of the mono-operation amplifier integrated circuit of LF351 and peripheral circuit thereof.
4. cable breakage according to claim 1 place detector, is characterized in that: described Hi-pass filter is comprised of the two operation amplifier integrated circuit of LF353 and peripheral circuit thereof.
5. cable breakage according to claim 1 place detector, is characterized in that: described output amplifier is comprised of the two operation amplifier integrated circuit of LF353 and peripheral circuit thereof.
6. cable breakage according to claim 1 place detector, it is characterized in that: on described audio frequency oscillator, be provided with output audio socket, input audio jack is equipped with in one end of described initial connecting lead wire, and one end of described initial connecting lead wire is connected on audio frequency oscillator by the grafting of input audio jack and output audio socket.
7. cable breakage according to claim 1 place detector, it is characterized in that: on described impact damper, be provided with input audio socket, output audio plug is equipped with in one end of described termination connecting lead wire, and one end of described termination connecting lead wire is connected on impact damper by the grafting of output audio plug and input audio socket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420069163.0U CN203811746U (en) | 2014-02-18 | 2014-02-18 | Cable break detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420069163.0U CN203811746U (en) | 2014-02-18 | 2014-02-18 | Cable break detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203811746U true CN203811746U (en) | 2014-09-03 |
Family
ID=51450479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420069163.0U Expired - Fee Related CN203811746U (en) | 2014-02-18 | 2014-02-18 | Cable break detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203811746U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760459A (en) * | 2014-02-18 | 2014-04-30 | 常州江南电力环境工程有限公司 | Detector for cable fracture positions |
-
2014
- 2014-02-18 CN CN201420069163.0U patent/CN203811746U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103760459A (en) * | 2014-02-18 | 2014-04-30 | 常州江南电力环境工程有限公司 | Detector for cable fracture positions |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202916392U (en) | Online monitoring system for partial discharge of switch cabinet based on pulse current method and grounding electric wave method | |
| CN104144237B (en) | Communication terminal audio frequency production line test method and test device | |
| CN203811746U (en) | Cable break detector | |
| CN103760459A (en) | Detector for cable fracture positions | |
| CN200979587Y (en) | A short distance audio-signal test device for locating cable fault | |
| CN101576599A (en) | Non-contact audio-frequency line-hunting method | |
| CN203405528U (en) | Grounding detection apparatus | |
| CN105093084A (en) | Partial discharge automatic testing device | |
| CN204203393U (en) | Electric wire breaking point detection circuit | |
| CN204330892U (en) | A kind of high-frequency treatment device on resistance testing circuit | |
| CN204964691U (en) | GIS (gas -insulated switchgear) partial discharge monitoring device | |
| CN203204811U (en) | Wireless transmitting system of partial discharge signal of transformer based on pulse current method detection | |
| CN203164351U (en) | A pile and electric leakage detecting circuit | |
| CN205210225U (en) | Detector is connected to winding displacement | |
| CN202693729U (en) | Novel line hunting instrument | |
| CN204271326U (en) | A kind of vibrating sensor cable connector | |
| CN204142685U (en) | A kind of insulator damage check instrument | |
| CN204241608U (en) | A kind of leakage current testing cassete | |
| CN109655726B (en) | Power cable partial discharge positioning system and detection method based on solenoid high-voltage line | |
| CN204228893U (en) | A kind of PD On-Line Measurement System | |
| CN209264896U (en) | One kind being used for 10KV network distribution transformer acoustic detecting device | |
| CN202421413U (en) | Cable broken point position detection locater | |
| CN203773005U (en) | Cable power failure finder | |
| CN204229625U (en) | A kind of USB tests connection wire and USB testing apparatus | |
| CN205608030U (en) | Special adapter of electric test wire |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160201 Address after: 213022 No. 159 Hanjiang West Road, Xinbei District, Jiangsu, Changzhou Patentee after: CHANGZHOU JIANGNAN ENVIRONMENTAL PROTECTION EQUIPMENT CO., LTD. Address before: 213245 Jiangsu city in Changzhou Province, Jintan City Industrial Zone Xue Bu Zhen Patentee before: Changzhou Jiangnan Electric Power Environmental Engineering Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20160218 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |