CN103760459A - Detector for cable fracture positions - Google Patents
Detector for cable fracture positions Download PDFInfo
- Publication number
- CN103760459A CN103760459A CN201410054355.9A CN201410054355A CN103760459A CN 103760459 A CN103760459 A CN 103760459A CN 201410054355 A CN201410054355 A CN 201410054355A CN 103760459 A CN103760459 A CN 103760459A
- Authority
- CN
- China
- Prior art keywords
- lead wire
- cable
- connecting lead
- 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.)
- Pending
Links
Images
Abstract
The invention discloses a detector for cable fracture positions. The detector comprises an audio oscillator, a buffer, a high-pass filter, an output amplifier and a headset, wherein the signal output end of the audio oscillator is connected with an initial connection lead used for being connected with an initial detection point of a detected cable, the signal input end of the buffer is connected with a termination connection lead used for being connected with a termination detection point of the detected cable, the signal output end of the buffer is connected with the signal input end of the high-pass filter, the signal output end of the high-pass filter is connected with the signal input end of the output amplifier, and the signal output end of the output amplifier is connected with the headset. The detector can detect the fracture positions of the cable timely and effectively and improve detection accuracy and detection efficiency.
Description
Technical field
The present invention 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 matters to be solved by this invention 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, technical scheme of the present invention 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 invention place detector;
Fig. 2 is the circuit connection diagram of cable breakage of the present invention place detector.
Embodiment
For content of the present invention is more easily expressly understood, according to specific embodiment also by reference to the accompanying drawings, the present invention is further detailed explanation 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 invention 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 present invention is solved further describe; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
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 |
|---|---|---|---|
| CN201410054355.9A CN103760459A (en) | 2014-02-18 | 2014-02-18 | Detector for cable fracture positions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410054355.9A CN103760459A (en) | 2014-02-18 | 2014-02-18 | Detector for cable fracture positions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103760459A true CN103760459A (en) | 2014-04-30 |
Family
ID=50527728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410054355.9A Pending CN103760459A (en) | 2014-02-18 | 2014-02-18 | Detector for cable fracture positions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103760459A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557407A (en) * | 2018-12-21 | 2019-04-02 | 湖南金泰检测检验有限公司 | Earth conductor cable breakpoint of cable position detecting circuit and method |
| CN114280468A (en) * | 2021-12-01 | 2022-04-05 | 苏州浪潮智能科技有限公司 | Control method and device for current sharing detection |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS576368A (en) * | 1980-06-12 | 1982-01-13 | Chubu Electric Power Co Inc | Method for detecting partial discharge of power cable |
| US5740255A (en) * | 1995-11-29 | 1998-04-14 | Wire World By David Salz, Inc. | High fidelity audio cable comparator and method therefor |
| US7746081B2 (en) * | 2006-12-08 | 2010-06-29 | General Electric Company | Cable detection method and apparatus |
| CN201637806U (en) * | 2010-04-22 | 2010-11-17 | 北京联合大学 | Cable breaking point detector |
| CN201716387U (en) * | 2010-07-02 | 2011-01-19 | 张明 | Fault detection instrument for mine power cable |
| CN203811746U (en) * | 2014-02-18 | 2014-09-03 | 常州江南电力环境工程有限公司 | Cable break detector |
-
2014
- 2014-02-18 CN CN201410054355.9A patent/CN103760459A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS576368A (en) * | 1980-06-12 | 1982-01-13 | Chubu Electric Power Co Inc | Method for detecting partial discharge of power cable |
| US5740255A (en) * | 1995-11-29 | 1998-04-14 | Wire World By David Salz, Inc. | High fidelity audio cable comparator and method therefor |
| US7746081B2 (en) * | 2006-12-08 | 2010-06-29 | General Electric Company | Cable detection method and apparatus |
| CN201637806U (en) * | 2010-04-22 | 2010-11-17 | 北京联合大学 | Cable breaking point detector |
| CN201716387U (en) * | 2010-07-02 | 2011-01-19 | 张明 | Fault detection instrument for mine power cable |
| CN203811746U (en) * | 2014-02-18 | 2014-09-03 | 常州江南电力环境工程有限公司 | Cable break detector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109557407A (en) * | 2018-12-21 | 2019-04-02 | 湖南金泰检测检验有限公司 | Earth conductor cable breakpoint of cable position detecting circuit and method |
| CN114280468A (en) * | 2021-12-01 | 2022-04-05 | 苏州浪潮智能科技有限公司 | Control method and device for current sharing detection |
| CN114280468B (en) * | 2021-12-01 | 2024-01-23 | 苏州浪潮智能科技有限公司 | Control method and device for current sharing detection |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204350072U (en) | Data line interface, headset plug, mobile terminal and system | |
| CN104144237B (en) | Communication terminal audio frequency production line test method and test device | |
| CN103760459A (en) | Detector for cable fracture positions | |
| CN203811746U (en) | Cable break detector | |
| CN101576599B (en) | Non-contact audio-frequency line-hunting method | |
| CN103634723B (en) | Audio input circuit and the electronic equipment with audio input | |
| CN200979587Y (en) | A short distance audio-signal test device for locating cable fault | |
| CN203327235U (en) | Receiver automatic test system in mobile phone production line | |
| CN209446718U (en) | A kind of portable fault diagnosis device for 10KV network distribution transformer | |
| CN204203393U (en) | Electric wire breaking point detection circuit | |
| EP2648419A3 (en) | Earphone jack and earphone interface circuit and electronic device | |
| CN202916306U (en) | Broadband current test caliper device | |
| CN203164351U (en) | A pile and electric leakage detecting circuit | |
| CN204271326U (en) | A kind of vibrating sensor cable connector | |
| CN205210225U (en) | Detector is connected to winding displacement | |
| CN104122481A (en) | Multifunction cable detection device | |
| CN209264896U (en) | One kind being used for 10KV network distribution transformer acoustic detecting device | |
| CN202421413U (en) | Cable broken point position detection locater | |
| CN108344888B (en) | Circuit transmission-based small signal circuit detection device and method in communication line | |
| CN203773005U (en) | Cable power failure finder | |
| CN207335973U (en) | A kind of cooling water test machine for being used to detect mould leak | |
| CN205608030U (en) | Special adapter of electric test wire | |
| CN205562730U (en) | A sleeve pipe end screen connecting device for transformer partial discharge test | |
| CN201498827U (en) | Earphone socket | |
| CN204229625U (en) | A kind of USB tests connection wire and USB testing apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20140430 |
|
| RJ01 | Rejection of invention patent application after publication |