CN203811670U - Cable built-in current sensor - Google Patents
Cable built-in current sensor Download PDFInfo
- Publication number
- CN203811670U CN203811670U CN201420229900.9U CN201420229900U CN203811670U CN 203811670 U CN203811670 U CN 203811670U CN 201420229900 U CN201420229900 U CN 201420229900U CN 203811670 U CN203811670 U CN 203811670U
- Authority
- CN
- China
- Prior art keywords
- current sensor
- cable
- tunnel magnetoresistive
- detection
- built
- 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 - Lifetime
Links
- 238000001514 detection method Methods 0.000 claims abstract description 16
- 239000004020 conductor Substances 0.000 claims description 14
- 238000009413 insulation Methods 0.000 claims description 13
- 238000012946 outsourcing Methods 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 206010000234 Abortion spontaneous Diseases 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 208000015994 miscarriage Diseases 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 208000000995 spontaneous abortion Diseases 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a cable built-in current sensor based on a tunnel magnetoresistive technology. The cable built-in current sensor comprises detection bare wires arranged in an outer insulating layer of a cable. The detection bare wires form a loop in the cable. Each detection bare wire comprises a segment insulating layer, and the two segment insulating layers are parallel and spaced. A tunnel magnetoresistive chip used for inducting and detecting current through the detection bare wires is arranged between the two insulating layers. The cable built-in current sensor can detect leakage current of cables without structural members such as magnetic core, has advantages of smart structure by using the tunnel magnetoresistive chip as a current sensor, can directly output detected electrical signals which can be used in a subsequent control circuit after being amplified simply, and has advantages of low cost, and simple and convenient realization, etc.
Description
Technical field
The utility model relates to a kind of built-in electric cable current sensor based on tunnel magnetoresistive technology.
Background technology
In the market cable being carried out to leakage current test, is all the scheme that adopts leakage current sensor.Leakage current sensor adopts fluxgate principle to make.The leakage current sensor of fluxgate principle needs some loaded down with trivial details techniques such as magnetic core, coiling, and the complicated treatment circuit of follow-up needs carrys out processing signals, and therefore the cost of detection streamer leakage current is high, implements very difficult.
Summary of the invention
Whether technical problem to be solved in the utility model is for above-mentioned prior art present situation, and a kind of built-in electric cable current sensor based on tunnel magnetoresistive technology is provided, leak electricity for detection of cable.
The utility model solves the problems of the technologies described above adopted technical scheme: a kind of built-in electric cable current sensor, comprises the detection bare conductor in the outsourcing insulation of being located at cable; Detect bare conductor in the inner formation of cable loop; On detection bare conductor, there are two sections of insulation courses that parallel interval, between two insulation courses, be provided with the tunnel magnetoresistive chip that detects electric current on bare conductor for responding to.
Compared with prior art, built-in electric cable current sensor of the present utility model, without structural members such as magnetic cores, leakage current that just can detection streamer.Adopt tunnel magnetoresistive chip as current sensor, have advantages of that structure is small and exquisite, directly the electric signal of output detections.This electric signal just can be used for follow-up control circuit after simple amplification, have cost low, realize advantage simply and easily.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described:
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the inner structure schematic diagram of Fig. 1.
Fig. 3 is the outer detecting circuit being connected with tunnel magnetoresistive chip.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in further detail.
Reference numeral is wherein: outsourcing insulation 1, detection bare conductor 2, insulation course 3, tunnel magnetoresistive chip 4, operational amplifier 5.
Cable generally comprises outsourcing insulation 1 and is located at the wire of outsourcing insulation 1 interior mutually insulated.Built-in electric cable current sensor of the present utility model, comprises that of being located in outsourcing insulation 1 forms the detection bare conductor 2 in loop.On detection bare conductor 2, there are two sections of insulation courses 3 that parallel interval, between two insulation courses 3, be provided with tunnel magnetoresistive chip 4.
When cable inside should mutually insulated wire while producing leakage current, electric current is just delivered to and detects on bare conductor 2, thereby makes to detect bare conductor 2 belt currents.
Tunnel magnetoresistive chip 4 adopts known tunnel magnetoresistance device.Tunnel magnetoresistive chip 4 is experienced and is detected the bare conductor 2 raw field signal of miscarriage that powers on, and converts field signal to electric signal output.
Shown in Fig. 2 is the outer detecting circuit that tunnel magnetoresistive chip 4 connects.Detect behind magnetic field, No. 2 stitch of tunnel magnetoresistive chip 4 and No. 3 stitch, to operational amplifier 5 output electrical signals, just can be used by subsequent control circuit after operational amplifier 5 amplifying signals.
Claims (1)
1. a built-in electric cable current sensor, is characterized in that: comprise the detection bare conductor (2) in the outsourcing insulation (1) of being located at cable; Described detection bare conductor (2) is in the inner formation of cable loop; On detection bare conductor (2), there are two sections of insulation courses (3) that parallel interval, between two insulation courses (3), be provided with the tunnel magnetoresistive chip (4) that detects the upper electric current of bare conductor (2) for responding to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420229900.9U CN203811670U (en) | 2014-05-06 | 2014-05-06 | Cable built-in current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420229900.9U CN203811670U (en) | 2014-05-06 | 2014-05-06 | Cable built-in current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203811670U true CN203811670U (en) | 2014-09-03 |
Family
ID=51450403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420229900.9U Expired - Lifetime CN203811670U (en) | 2014-05-06 | 2014-05-06 | Cable built-in current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203811670U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469577A (en) * | 2018-05-24 | 2018-08-31 | 广东电网有限责任公司 | A kind of device by leakage current measurement cable aging |
-
2014
- 2014-05-06 CN CN201420229900.9U patent/CN203811670U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108469577A (en) * | 2018-05-24 | 2018-08-31 | 广东电网有限责任公司 | A kind of device by leakage current measurement cable aging |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2015038257A3 (en) | Systems and methods for detection of load impedance of a transducer device coupled to an audio device | |
| WO2013119846A3 (en) | Multi-free layer mtj and multi-terminal read circuit with concurrent and differential sensing | |
| WO2015039002A3 (en) | Systems and methods for detection of load impedance of a transducer device coupled to an audio device | |
| BR112014017647A8 (en) | PLUG-AND-PLAY SENSOR PERIPHERAL COMPONENT, SYSTEM, METHOD FOR ACCESSING INFORMATION CHARACTERISTIC OF A PLUG-AND-PLAY SENSOR PERIPHERAL COMPONENT | |
| EP2781888A3 (en) | Device for detecting position of rotating working means in active magnetic bearing | |
| CN203881884U (en) | Power distribution network overhead line fault monitoring device | |
| CN203786189U (en) | Dual-magnetic core current sensor | |
| CN203811670U (en) | Cable built-in current sensor | |
| CN103698720A (en) | Magnetic flux detecting method for open-loop magnetic flux sensor | |
| MD3961G2 (en) | Device for measuring the linear resistance of the glass-insulated wire in the casting process | |
| CN102520453A (en) | Method used for searching path of live power cable | |
| CN105136008B (en) | A kind of strip offset detecting device | |
| CN203786190U (en) | Tunnel magnetoresistive current sensor | |
| CN105425089A (en) | High-tension power transmission cable detection and alarm device | |
| CN201421485Y (en) | Cable measuring device | |
| CN204361418U (en) | A kind of intelligent electric-shock protection socket | |
| CN105277842B (en) | A kind of power equipment leakage current sensor and leakage current signal extracting method | |
| CN104698402A (en) | Ribbon cable detection method for magnetic flux of open loop magnetic flux sensor | |
| CN204188817U (en) | A kind of telescopic power lead detector | |
| CN203929946U (en) | A kind of interconnecting cable induced field test device | |
| CN204390804U (en) | Strand winder circuit wire detecting device | |
| CN202710642U (en) | Improved current sensor | |
| CN203274942U (en) | Plug-in type multipoint temperature measuring device for power cables | |
| CN203786188U (en) | Current sensor having multi-turn magnetic core | |
| CN205899044U (en) | Mining electromechanical device start -stop state sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |
|
| CX01 | Expiry of patent term |