CN205301496U - Power cable fault intelligence fixed point device - Google Patents
Power cable fault intelligence fixed point device Download PDFInfo
- Publication number
- CN205301496U CN205301496U CN201521096908.3U CN201521096908U CN205301496U CN 205301496 U CN205301496 U CN 205301496U CN 201521096908 U CN201521096908 U CN 201521096908U CN 205301496 U CN205301496 U CN 205301496U
- Authority
- CN
- China
- Prior art keywords
- signal
- magnetic field
- power cable
- fixed point
- pulse current
- 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.)
- Active
Links
Landscapes
- Locating Faults (AREA)
Abstract
The utility model relates to a power cable fault intelligence fixed point device belongs to cable recognition technology field. This power cable fault intelligence fixed point device, including pulse current emitter, pulse current emitter pours into the pulse current signal into for the cable core, and characterized by still includes first magnetic field sensor, second magnetic field sensor, sound sensor, signal primary amplifier, microprocessor and display. The device of this product adopts two way magnetic field sensors, guarantees can not appear the unable measuring condition because can not detecting the magnetic field signal, receiving arrangement can be according to the signal intensity automatic adjustment gain of receiving.
Description
Technical field
This utility model relates to a kind of power cable fault Intelligent fixed point device, belongs to cable identification technical field.
Background technology
Along with the development of national economy, the proportion that cable accounts in power transmission line is more and more higher. Underground all it is laid on, although have a lot of advantage, once occur the fault-finding of problem cable to be always up a difficult problem for puzzlement power supply department maintenance relative to traditional aerial line cable. In order to facilitate the lookup of power cable fault, it is necessary to use the instrument of specialty to carry out the pinpoint of cable fault.
The most frequently used, the most ripe technology of type cable failure positioning is employing sound magnetic method, namely a pulse current is sent to cable one end by discharger, this electric current produces electromagnetic field around target cable and sends sound at position of failure point, then in tested region by sensor detection sound and field signal, disregarding owing to the electromagnetic wave propagation time is substantially negligible, therefore the distance of trouble point and sensor is the time difference of field signal and acoustical signal and is multiplied by the spread speed of sound. At present, common way Shi Jiang mono-road field signal and the detecting device of a road acoustical signal are arranged on a sensor internal, position determination of fault is carried out by detecting field signal and acoustical signal respectively, but owing to not knowing the layout path of cable during this apparatus measures, in measurement process, it is easy to measurement blind area occurs owing to measuring less than field signal. One new type cable failure positioning device of design ensures to detect that signal is very necessary at diverse location and angle as can be seen here.
Chinese patent discloses in the sensor of one " Intelligent multi-sensor cable fault localization instrument patent No. CN201020256531.4 " electromagnetic wave receiver only with a road, there will be when tested cable and sensing station change and detect the phenomenon less than electromagnetic wave signal, measurement result can be affected.
Chinese patent discloses one " application process of failure cable current and noise-free hand-held type cable failure positioning instrument patent No. CN200710018621.2 " and have employed two sensors to receive electromagnetic wave signal, although being free to regulate the position of detection electromagnetic wave signal, but the inconvenience of carrying, simultaneously need to ceaselessly change detecting location to guarantee to detect electromagnetic wave signal, measure process extremely complex.
Chinese patent discloses one " Power Cable Fault Locator patent No. CN201220238179.0 " and is placed in a detector by two electromagnetic sensors of coiling, although simple in construction, but electromagnetic sensor can only detect the signal on a direction, likely there will be when electromagnetic wave direction changes and detect the situation less than electromagnetic wave signal, it is easy to occur measuring inaccurate situation.
Utility model content
This product pinpoints Problems existing for current power cable fault, through substantial amounts of test and exploration, two-way magnetic field sensor is adopted to gather electromagnetic wave signal, it is ensured that no matter sensor is positioned over above power cable with which kind of direction can both collect field signal, improves spot jamming power; Receive signal intensity and reference signal strength that device adopts liquid crystal display current, it is possible to auxiliary user's gain-adjusted, it is achieved quickly measure. Solve in prior art and cause, because sensor placement location is improper, the problem that cannot measure. Can only pinpointing of power cable fault can be completed quickly, effectively, intuitively, accurately.
This utility model purpose is achieved through the following technical solutions:
A kind of power cable fault Intelligent fixed point device, including pulse current discharger, pulse current discharger is to cable core injected pulse current signal, it is characterized in that, also include the first magnetic field sensor, the second magnetic field sensor, sound transducer, signal primary amplifier, microprocessor and display, described the first magnetic field sensor, the second magnetic field sensor and a sound transducer electrically connect with microprocessor respectively through after signal primary amplifier, and described microprocessor passes through display output display.
As preferably, also including signal secondary amplifier, be provided with signal secondary amplifier between described signal primary amplifier and microprocessor.
As preferably, also including gain adjustment device, described signal secondary amplifier is provided with gain adjustment device.
As preferably, described microprocessor is ARM.
Compared with prior art, this product has the advantage that
(1) device adopts two-way magnetic field sensor, it is ensured that do not have because the situation that can't detect field signal and cannot measure.
(2) receiving device can according to the current signal strength received and reference value contrast, and auxiliary user makes gain-adjusted, it is to avoid user leads to errors because gain-adjusted is improper judgement.
(3) capacity of resisting disturbance is strong, it is possible to can measure when environment noise is bigger.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present embodiment.
Fig. 2 is the schematic diagram of two-way magnetic field sensor detection field signal.
Label declaration: pulse current discharger the 1, first magnetic field sensor the 2, second magnetic field sensor 3, sound transducer 4, signal primary amplifier 5, microprocessor 6, display 7, signal secondary amplifier 8, gain adjustment device 9, tested cable 10.
Detailed description of the invention
Below in conjunction with specific embodiment, this utility model being described, the following example is merely to illustrate the technical solution of the utility model, does not limit protection domain of the present utility model.
Embodiment:
As illustrated in fig. 1 and 2, the product of the present embodiment includes pulse current discharger, pulse current discharger is to cable core injected pulse current signal, the present embodiment also includes the first magnetic field sensor, the second magnetic field sensor, sound transducer, signal primary amplifier, microprocessor and display, first magnetic field sensor, the second magnetic field sensor and a sound transducer electrically connect with microprocessor respectively through after signal primary amplifier, microprocessor passes through display output display, and microprocessor is ARM.
The present embodiment also includes signal secondary amplifier and gain adjustment device, is provided with signal secondary amplifier, signal secondary amplifier is provided with gain adjustment device between signal primary amplifier and microprocessor.
Operation principle:
This device need to coordinate pulse current discharger, in use procedure, pulse current discharger is to cable core injected pulse current signal, this electric current can send the sound punctured in trouble point while producing electromagnetic field around failure cable, type cable failure positioning device judges to draw the position of Method of Cable Trouble Point by receiving the time difference of field signal and acoustical signal.
The distance of the localization of faults and device is carried out by power cable fixed-point apparatus detection field signal and acoustical signal. When unknown when moving towards of cable, the magnetic direction of generation is unknown, and a traditional road magnetic field sensor exists the defect that can't detect field signal, therefore adopts two-way magnetic field sensor detection field signal, and concrete structure is as shown in Figure 2. During work, two-way magnetic field sensor and a road sound transducer are respectively received field signal and acoustical signal, this three roads signal is voltage signal, and the initial signal of this three roads signal is very faint, it is therefore desirable to adopt high-accuracy operational amplifier to carry out signal primary amplification. One stage signal secondary amplification circuit is added again, it is simple to the signal power that user shows according to on-site actual situations and instrument is performed manually by gain-adjusted after signal primary is amplified. ARM in device can gather the signal after primary and secondary amplifies, and collects the time difference of field signal and acoustical signal according to magnetic field and calculates the position of failure point of cable in conjunction with correlation formula, and is shown by display.
In this type of type cable failure positioning device in the market, the commonly used direction of magnetic field detectors is installed, due to the change of field signal and sensor angles in measurement process at the scene, it is easy to occur that detection causes the situation occurring pinpointing less than field signal. In addition partial devices can not show the power of signal, is not easy to regulate gain, thus affecting measurement effect.
The proposition of this product, solves some above-mentioned shortcomings substantially, specific as follows:
(1) liquid-crystal display section not only shows that fault distance also shows signal power and reference signal strength, it is simple to user regulates signal gain, improves measurement effect.
(2) Instrument sensor partial magnetic field signal is key component, and this sensor adopts a kind of new field signal detection method to ensure that sensor can both detect field signal in any position, it is to avoid cause because field signal can't detect measuring.
(3) there will be choppy voice phenomenon when instrument distance fault point distance is bigger, cause that measurement is inaccurate, this device remains to accurate measurement when making instrument distance fault point farther out by a kind of new algorithm.
Above content described in this specification is only to this utility model structure example explanation. Described instantiation can be done various amendment or supplements or adopt similar mode to replace by the novel described those skilled in the art of this use; without departing from structure of the present utility model or surmount the scope that present claims book is defined, the protection domain that this use is novel all should be belonged to.
Claims (4)
1. a power cable fault Intelligent fixed point device, including pulse current discharger, pulse current discharger is to cable core injected pulse current signal, it is characterized in that, also include the first magnetic field sensor, the second magnetic field sensor, sound transducer, signal primary amplifier, microprocessor and display, described the first magnetic field sensor, the second magnetic field sensor and a sound transducer electrically connect with microprocessor respectively through after signal primary amplifier, and described microprocessor passes through display output display.
2. power cable fault Intelligent fixed point device according to claim 1, it is characterised in that: also include signal secondary amplifier, between described signal primary amplifier and microprocessor, be provided with signal secondary amplifier.
3. power cable fault Intelligent fixed point device according to claim 2, it is characterised in that: also include gain adjustment device, described signal secondary amplifier is provided with gain adjustment device.
4. power cable fault Intelligent fixed point device according to claim 1, it is characterised in that: described microprocessor is ARM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521096908.3U CN205301496U (en) | 2015-12-28 | 2015-12-28 | Power cable fault intelligence fixed point device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521096908.3U CN205301496U (en) | 2015-12-28 | 2015-12-28 | Power cable fault intelligence fixed point device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205301496U true CN205301496U (en) | 2016-06-08 |
Family
ID=56472985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521096908.3U Active CN205301496U (en) | 2015-12-28 | 2015-12-28 | Power cable fault intelligence fixed point device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205301496U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181552A (en) * | 2018-01-17 | 2018-06-19 | 武汉科技大学 | Buried cable fault detection system and its fault detection method |
| CN111624437A (en) * | 2020-04-18 | 2020-09-04 | 西安电子科技大学 | Integrated comprehensive underground cable maintenance detection method, detection system and detection instrument |
-
2015
- 2015-12-28 CN CN201521096908.3U patent/CN205301496U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181552A (en) * | 2018-01-17 | 2018-06-19 | 武汉科技大学 | Buried cable fault detection system and its fault detection method |
| CN111624437A (en) * | 2020-04-18 | 2020-09-04 | 西安电子科技大学 | Integrated comprehensive underground cable maintenance detection method, detection system and detection instrument |
| CN111624437B (en) * | 2020-04-18 | 2021-07-30 | 西安电子科技大学 | Integrated comprehensive underground cable maintenance detection method, detection system and detection instrument |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102159956B (en) | Arc fault location detection for aircraft wiring | |
| CN205640252U (en) | A optical fiber detection leakage system for regional normal atmospheric temperature fluid pipeline | |
| US8988099B2 (en) | On-line time domain reflectometer system | |
| CN101782621B (en) | Method and device for judging fault point locations in cable protective layer fault detection | |
| CN105351756A (en) | Pipeline leakage recognizing and positioning system and method based on sound wave imaging | |
| CN104747912A (en) | Fluid conveying pipe leakage acoustic emission time-frequency positioning method | |
| CN103629534B (en) | Oil pipeline leakage detection and positioning method based on comprehensive signals | |
| EP0604516A1 (en) | Advanced method and cable fault locator | |
| US20100171483A1 (en) | Systems and Methods for Detecting Anomalies in Elongate Members Using Electromagnetic Back Scatter | |
| CN108414908B (en) | Cathode protection insulation tester and testing method thereof | |
| CN105891681B (en) | A kind of cable line fault independent positioning method of the compound triggering of multiple threshold values | |
| CN105909980A (en) | Underground pipeline leakage point positioning method based on combination of amplitude fading and correlative detection | |
| CN107015119A (en) | A kind of signal cable Circuit fault diagnosis device and method | |
| CN110726905B (en) | Method and system for determining cable position based on cable length | |
| CN106482805A (en) | A kind of can real time fail monitoring multi-channel optical fibre liquid level measuring system and fault monitoring method | |
| CN108020751A (en) | A kind of Cable fault examination method and Cable fault examination system | |
| CN205301496U (en) | Power cable fault intelligence fixed point device | |
| CN109991511B (en) | Lightning stroke monitoring device and monitoring method for overhead line | |
| CN103196991B (en) | The all standing transient electromagnetic detection method of the metal erosion of continuous diagnosis body and defect | |
| CN106841914B (en) | Fault distance measuring device of distribution line | |
| CN105388401A (en) | Novel cable oscillation wave partial discharge detection system | |
| CN110196402A (en) | A kind of method of multi-point calibration shelf depreciation Apparent discharge magnitude | |
| CN203502372U (en) | Defect detection system for polymer grouting curtain of dam body | |
| CN105974276A (en) | GIS interval delivery withstand voltage test breakdown point locating method | |
| CN115267435A (en) | Power cable fault positioning device and method based on GPS trigger pulse |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |