CN105486977A - Fault detection system and method for leaky cables - Google Patents
Fault detection system and method for leaky cables Download PDFInfo
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- CN105486977A CN105486977A CN201510825063.5A CN201510825063A CN105486977A CN 105486977 A CN105486977 A CN 105486977A CN 201510825063 A CN201510825063 A CN 201510825063A CN 105486977 A CN105486977 A CN 105486977A
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- leaky cable
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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- Locating Faults (AREA)
Abstract
The invention discloses a fault detection system and method for leaky cables. The detection system comprises signal emission units, signal reception units and a calculation unit, wherein the signal emission units are arranged among the leaky cables or at positions where the leaky cables are connected with other equipment, and used to emit signals to the leaky cables; the signal reception signals are arranged at the connection positions and used for receiving return signals of the emission signals; and the calculation unit calculates the echo loss value according to the emission signals and the return signals, and when the echo loss value is greater than a preset value, prompt information is emitted. According to the technical scheme of the invention, the whole leaky cables can be monitored automatically in real time to determine whether the leaky cables have faults and determine the fault position automatically.
Description
Technical field
The present invention relates to leakage cable technology field, in particular to a kind of leaky cable fault detection system and a kind of leaky cable fault detection method.
Background technology
The general wireless signal adopted between leakage cable transmission train and ground in CBTC (train automatic controlling system), the transmission of signal between the performance impact train of leaky cable and ground, there is larger difficulty when reality is safeguarded, therefore need to monitor leaky cable.Monitor mainly through following several scheme in prior art:
Scheme 1: off-line type detects, at the scene by manually detecting leakage cable;
Scheme 2: launch and accept is monitored, by detecting transmitting and receiving signal power, calculating the loss of leakage cable thus and monitoring;
Scheme 3: passive type on-line monitoring, detecting unit is passive extracts a small amount of signal energy of leaking cable, calculates and leaks the every radio-frequency performance of cable on present operating frequency, report Lou cable management system.
Above-mentioned off-line type detects, can not on-line monitoring, detects length shorter, and complicated operation; Launch and accept monitoring then cannot localization of fault; The monitoring length of passive type on-line monitoring is shorter.
Summary of the invention
Technical matters to be solved by this invention is, how the fault of real time on-line monitoring leaky cable.
For this purpose, the present invention proposes a kind of leaky cable fault detection system, comprising:
Multiple signal transmitter unit, is arranged on leaky cable and other leaky cables or the junction with other equipment, for transmitting to described leaky cable;
Multiple signal receiving unit, is arranged on described junction, for receiving the return signal transmitted;
Computing unit, transmits and described return signal calculating return loss value according to described, when described return loss value is greater than preset value, sends information.
Preferably, described signal transmitter unit transmits to described leaky cable according to predetermined period.
Preferably, described computing unit, when described return loss value is greater than preset value, also for the difference of the time of return of launch time of transmitting described in basis and described return signal, calculates the position that described leaky cable breaks down.
Preferably, also comprise:
Detecting signal unit, before described signal transmitter unit transmits, detect the frequency of the original signal transmitted in described leaky cable, the frequency of described original signal is sent to described signal transmitter unit, differ from the frequency of described original signal with the frequency making described signal transmitter unit transmit.
The invention allows for a kind of train automatic controlling system, comprise above-mentioned leaky cable fault detection system.
The invention allows for a kind of leaky cable fault detection method based on said system, comprising:
Between leaky cable or the junction of leaky cable and other equipment, transmit to described leaky cable;
The return signal transmitted is received in described junction;
Transmit and described return signal calculating return loss value according to described, when described return loss value is greater than preset value, send information.
Preferably, transmit to described leaky cable and comprise: transmit to described leaky cable according to predetermined period.
Preferably, said method also comprises:
When described return loss value is greater than preset value, according to the difference of the time of return of described launch time of transmitting and described return signal, calculate the position that described leaky cable breaks down.
Preferably, said method also comprises:
Before transmitting, detect the frequency of the original signal transmitted in described leaky cable,
Then transmit to described leaky cable and comprise:
Transmission frequency differs from the signal of described original signal frequency.
According to technique scheme, the present invention in real time and automatically monitor whole piece leaky cable, to judge whether there is fault in leaky cable, automatically can also determine location of fault.
Accompanying drawing explanation
Fig. 1 shows the schematic block diagram of leaky cable fault detection system according to an embodiment of the invention;
Fig. 2 shows the Signal transmissions schematic diagram of leaky cable fault detection system according to an embodiment of the invention;
Fig. 3 shows the schematic flow diagram of leaky cable fault detection method according to an embodiment of the invention.
Embodiment
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, leaky cable fault detection system 10 according to an embodiment of the invention, comprising:
Multiple signal transmitter unit 11, is arranged on leaky cable and other leaky cables or the junction with other equipment, for transmitting to leaky cable;
Multiple signal receiving unit 12, be arranged on above-mentioned junction, for receiving the return signal (in Fig. 1, conveniently signal illustrate only a signal transmitter unit 11 and a signal receiving unit 12, in fact can arrange a signal transmitter unit 11 and a signal receiving unit 12 in each junction) transmitted;
Computing unit 13, according to transmitting and return signal calculating return loss value, when return loss value is greater than preset value, sends information.
Return loss, also referred to as reflection loss, its Producing reason is the reflection that impedance mismatch produces, mainly occur in leaky cable and other leaky cables or the junction with other equipment, also the position that in a leaky cable, characteristic impedance changes can be occurred in, return loss generally can represent according to the logarithm of the ratio of the power of the power of reflected signal and incoming signal, and its unit is dB.
The present embodiment is by each junction signalization transmitter unit of leaky cable and signal receiving unit, the leaky cable making signal transmitter unit and signal receiving unit be only used to its both sides, junction, place transmits and Received signal strength (as shown in Figure 2), thus be absorbed in and monitor (if to transmit mutually interference in order to avoid two signal transmitter units to the impedance conditions in these two leaky cables, a screen unit can also be set in each junction, to shield the signal that other junction transmitter units are launched).And for the impedance conditions of other leaky cables, then can be transmitted and Received signal strength by other signal transmitter unit and signal receiving unit, and then monitor.
After each Received signal strength of signal receiving unit, can by Signal transmissions to computing unit, computing unit transmits according to signal transmitter unit, and the Received signal strength of signal receiving unit calculates the return loss of corresponding leaky cable, when return loss is greater than preset value, illustrate in this leaky cable to there is larger impedance variation, thus can judge that this leaky cable exists fault.
Because observation process carries out for every root leaky cable, therefore whole monitoring can be carried out to the leaky cable of long distance.And independently can monitor for every root leaky cable again, observation process is convenient, and computation process is simple, is easier to realize, without the need to leaky cable off-line.
Preferably, signal transmitter unit 11 transmits to leaky cable according to predetermined period.Signal receiving unit 12 continuous reception return signal.By the present embodiment, can monitor the fault in leaky cable in real time, make the fault real-time that monitors stronger, be convenient to staff and the present situation is taken the concrete measures.
Preferably, computing unit 13, when return loss value is greater than preset value, also for the difference of the time of return according to the launch time transmitted and return signal, calculates the position that leaky cable breaks down.
Transmitting can be electromagnetic wave, its in leaky cable with light velocity propagation, Received signal strength and the mistiming transmitted be multiplied by the light velocity be in leaky cable trouble spot to the twice of launching site place distance, the position of breaking down in leaky cable can be determined accordingly, and then provide positional information accurately, without the need to manually specifically locating for maintenance personal.
Preferably, this leaky cable fault detection system also comprises:
Detecting signal unit 14, before signal transmitter unit transmits, detects the frequency of the original signal transmitted in leaky cable, the frequency of original signal is sent to signal transmitter unit, differs from the frequency of original signal with the frequency making signal transmitter unit 11 transmit.
Because leaky cable itself is for signal transmission (i.e. original signal), and transmit when identical with original signal frequency, interference can be caused to original signal, therefore the frequency that the frequency transmitted differs from original signal can be set, while carrying out monitoring can not to leaky cable in the original signal that transmits cause interference.
As shown in Figure 2, by calculating, computing unit determines that leaky cable exists fault and location of fault after, the information obtained can be uploaded onto the server, server can record the leaky cable label broken down, and the position of breaking down, and further above-mentioned information transmission is keeped in repair to monitoring center prompting maintenance personal.
The invention allows for a kind of train automatic controlling system (i.e. CBTC), comprise above-mentioned leaky cable fault detection system.
The leaky cable fault detection system that theres is provided of the present embodiment is provided, the Signal transmissions on the train in CBTC and ground can be ensured, the maintenance difficulties of reduction leaky cable.
As shown in Figure 3, the invention allows for a kind of leaky cable fault detection method based on said system, comprising:
S1, between leaky cable or the junction of leaky cable and other equipment, transmits to leaky cable;
S2, receives the return signal transmitted in junction;
S3, according to transmitting and return signal calculating return loss value, when return loss value is greater than preset value, sends information.
Preferably, transmit to leaky cable and comprise: transmit to leaky cable according to predetermined period.
Preferably, said method also comprises:
When return loss value is greater than preset value, according to the difference of the time of return of the launch time transmitted and return signal, calculate the position that leaky cable breaks down.
Preferably, said method also comprises:
Before transmitting, detect the frequency of the original signal transmitted in leaky cable,
Then transmit to leaky cable and comprise:
Transmission frequency differs from the signal of original signal frequency.
More than be described with reference to the accompanying drawings technical scheme of the present invention, considered in prior art, be difficult to accomplish automatically simultaneously, determine whether sew optical cable breaks down online, and the position of breaking down.By the technical scheme that this application for issue is bright, can when not off-line, in real time and automatically whole piece leaky cable is monitored, to judge whether there is fault in leaky cable, automatically location of fault can also be determined.
In the present invention, term " multiple " refers to two or more, unless otherwise clear and definite restriction.
Although describe embodiments of the present invention by reference to the accompanying drawings, but those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, such amendment and modification all fall into by within claims limited range.
Claims (9)
1. a leaky cable fault detection system, is characterized in that, comprising:
Multiple signal transmitter unit, is arranged between leaky cable or the junction of leaky cable and other equipment, for transmitting to described leaky cable;
Multiple signal receiving unit, is arranged on described junction, for receiving the return signal transmitted;
Computing unit, transmits and described return signal calculating return loss value according to described, when described return loss value is greater than preset value, sends information.
2. system according to claim 1, is characterized in that, described signal transmitter unit transmits to described leaky cable according to predetermined period.
3. system according to claim 2, it is characterized in that, described computing unit, when described return loss value is greater than preset value, also for the difference of the time of return of launch time of transmitting described in basis and described return signal, calculates the position that described leaky cable breaks down.
4. system according to any one of claim 1 to 3, is characterized in that, also comprises:
Detecting signal unit, before described signal transmitter unit transmits, detect the frequency of the original signal transmitted in described leaky cable, the frequency of described original signal is sent to described signal transmitter unit, differ from the frequency of described original signal with the frequency making described signal transmitter unit transmit.
5. a train automatic controlling system, is characterized in that, comprises the leaky cable fault detection system according to any one of Claims 1-4.
6., based on a leaky cable fault detection method for system according to any one of Claims 1-4, it is characterized in that, comprising:
Between leaky cable or the junction of leaky cable and other equipment, transmit to leaky cable;
The return signal transmitted is received in described junction;
Transmit and described return signal calculating return loss value according to described, when described return loss value is greater than preset value, send information.
7. method according to claim 6, is characterized in that, transmitting to described leaky cable comprises: transmit to described leaky cable according to predetermined period.
8. method according to claim 7, is characterized in that, also comprises:
When described return loss value is greater than preset value, according to the difference of the time of return of described launch time of transmitting and described return signal, calculate the position that described leaky cable breaks down.
9. the method according to any one of claim 6 to 8, is characterized in that, also comprises:
Before transmitting, detect the frequency of the original signal transmitted in described leaky cable,
Then transmit to described leaky cable and comprise:
Transmission frequency differs from the signal of described original signal frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510825063.5A CN105486977A (en) | 2015-11-24 | 2015-11-24 | Fault detection system and method for leaky cables |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510825063.5A CN105486977A (en) | 2015-11-24 | 2015-11-24 | Fault detection system and method for leaky cables |
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| CN105486977A true CN105486977A (en) | 2016-04-13 |
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| CN201510825063.5A Pending CN105486977A (en) | 2015-11-24 | 2015-11-24 | Fault detection system and method for leaky cables |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768458A (en) * | 2018-04-27 | 2018-11-06 | 广州杰赛科技股份有限公司 | Multi-system access platform leaks detection method, device and the leakage cable detecting system of cable |
| CN108768457A (en) * | 2018-04-27 | 2018-11-06 | 广州杰赛科技股份有限公司 | Multi-system access platform leaks detection method, device and the leakage cable detecting system of cable |
| CN108982970A (en) * | 2018-04-27 | 2018-12-11 | 广州杰赛科技股份有限公司 | Multi-system access platform leaks detection method, device and the leakage cable detection system of cable |
| CN110320446A (en) * | 2019-07-18 | 2019-10-11 | 国网重庆市电力公司江北供电分公司 | Power cable defect location and diagnostic method based on return loss spectrometry |
| WO2020024804A1 (en) * | 2018-08-03 | 2020-02-06 | 中车大连电力牵引研发中心有限公司 | Cable detection system and method |
| CN112730983A (en) * | 2021-01-15 | 2021-04-30 | 焦作铁路电缆有限责任公司 | Method for testing leaky coaxial cable |
| CN113504416A (en) * | 2021-06-11 | 2021-10-15 | 中国人民解放军海军工程大学 | Leakage cable testing system and method |
| CN113759204A (en) * | 2021-11-10 | 2021-12-07 | 成都高斯电子技术有限公司 | Power line loss testing device and method |
| CN115765794A (en) * | 2022-12-06 | 2023-03-07 | 中国铁塔股份有限公司 | Leaky cable performance evaluation method and device |
| CN117214587A (en) * | 2023-11-07 | 2023-12-12 | 国网浙江省电力有限公司象山县供电公司 | Detection method and detection system for cable equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050140376A1 (en) * | 2003-12-30 | 2005-06-30 | Brown Jeffrey M. | Apparatus and method for monitoring transmission systems using off-frequency signals |
| CN201004258Y (en) * | 2006-11-02 | 2008-01-09 | 辛东升 | Leakage cable guard system |
| CN102098117A (en) * | 2010-12-31 | 2011-06-15 | 深圳市虹远通信有限责任公司 | Method for detecting leakage cable based on reflected wave comprehensive performances |
| CN203054240U (en) * | 2012-12-19 | 2013-07-10 | 上海申达自动防范系统工程有限公司 | Detecting instrument for detecting and positioning of leaky cable |
-
2015
- 2015-11-24 CN CN201510825063.5A patent/CN105486977A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050140376A1 (en) * | 2003-12-30 | 2005-06-30 | Brown Jeffrey M. | Apparatus and method for monitoring transmission systems using off-frequency signals |
| CN201004258Y (en) * | 2006-11-02 | 2008-01-09 | 辛东升 | Leakage cable guard system |
| CN102098117A (en) * | 2010-12-31 | 2011-06-15 | 深圳市虹远通信有限责任公司 | Method for detecting leakage cable based on reflected wave comprehensive performances |
| CN203054240U (en) * | 2012-12-19 | 2013-07-10 | 上海申达自动防范系统工程有限公司 | Detecting instrument for detecting and positioning of leaky cable |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108768458A (en) * | 2018-04-27 | 2018-11-06 | 广州杰赛科技股份有限公司 | Multi-system access platform leaks detection method, device and the leakage cable detecting system of cable |
| CN108768457A (en) * | 2018-04-27 | 2018-11-06 | 广州杰赛科技股份有限公司 | Multi-system access platform leaks detection method, device and the leakage cable detecting system of cable |
| CN108982970A (en) * | 2018-04-27 | 2018-12-11 | 广州杰赛科技股份有限公司 | Multi-system access platform leaks detection method, device and the leakage cable detection system of cable |
| WO2020024804A1 (en) * | 2018-08-03 | 2020-02-06 | 中车大连电力牵引研发中心有限公司 | Cable detection system and method |
| CN110320446A (en) * | 2019-07-18 | 2019-10-11 | 国网重庆市电力公司江北供电分公司 | Power cable defect location and diagnostic method based on return loss spectrometry |
| CN112730983A (en) * | 2021-01-15 | 2021-04-30 | 焦作铁路电缆有限责任公司 | Method for testing leaky coaxial cable |
| CN112730983B (en) * | 2021-01-15 | 2024-04-12 | 焦作铁路电缆有限责任公司 | Test method for leaky coaxial cable |
| CN113504416A (en) * | 2021-06-11 | 2021-10-15 | 中国人民解放军海军工程大学 | Leakage cable testing system and method |
| CN113759204A (en) * | 2021-11-10 | 2021-12-07 | 成都高斯电子技术有限公司 | Power line loss testing device and method |
| CN115765794A (en) * | 2022-12-06 | 2023-03-07 | 中国铁塔股份有限公司 | Leaky cable performance evaluation method and device |
| CN117214587A (en) * | 2023-11-07 | 2023-12-12 | 国网浙江省电力有限公司象山县供电公司 | Detection method and detection system for cable equipment |
| CN117214587B (en) * | 2023-11-07 | 2024-03-29 | 国网浙江省电力有限公司象山县供电公司 | Detection method and detection system for cable equipment |
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| CB02 | Change of applicant information |
Address after: 100070 Beijing science and Technology Park of Fengtai District Seahawks Hospital No. 6 2, No. 3 (Park) Applicant after: TRAFFIC CONTROL TECHNOLOGY Co.,Ltd. Address before: 100070 Beijing science and Technology Park of Fengtai District Haiying Road No. 6 hospital of Beijing, the headquarters of the International 2 Building No. 3 Applicant before: TRAFFIC CONTROL TECHNOLOGY Co.,Ltd. |
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Application publication date: 20160413 |
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