CN101436463A - Detachable high precision feeble current sensor - Google Patents
Detachable high precision feeble current sensor Download PDFInfo
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- CN101436463A CN101436463A CNA2008100814894A CN200810081489A CN101436463A CN 101436463 A CN101436463 A CN 101436463A CN A2008100814894 A CNA2008100814894 A CN A2008100814894A CN 200810081489 A CN200810081489 A CN 200810081489A CN 101436463 A CN101436463 A CN 101436463A
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- current sensor
- iron core
- current
- magnetic resistance
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Abstract
In a plurality of systems, very weak current needs to be monitored, and the weak current signal can be AC or DC. At present, only the cross-core current sensor is used to measure the high-precision weak current. When the current in a conducting wire is measured, a caliper type current sensor is needed, but air gap is existed in the caliper type current sensor, and magnetic resistance is greatly increased, and the measurement precision is greatly lowered along with the increase of the magnetic resistance. In the present markets, no weak current sensor with detachable structure, high precision and large caliber is sold. The invention provides a method for manufacturing the weak current sensor with detachable structure and high precision; in the method, an iron core is unnecessarily cut off to increase the magnetic resistance and further lower the measurement precision, so that the current sensor is high in measurement precision. The current sensor changes the technical processing process of the cross-core current sensor in principle, but in essence, the current sensor is the same as the cross-core current sensor.
Description
Technical field
The present invention mainly relates to has very faint electric current to monitor and to detect in the electric power system, this faint current signal, but alternating current, also direct current.Distinguish from mounting structure, current sensor has punching (must pass lead in the current sensor hole by) but and demolition, installation formula (current sensor can be installed from the lead centre position).Just can be convenient to tear open and adorn but generally must cut iron core open when the iron core of current sensor is made demolition, installation, iron core has just had air-gap, thereby magnetic resistance will increase greatly, and its certainty of measurement of transducer will descend greatly with the magnetic resistance increase.Need demolition, installation again but can't solve many occasions at present, the transducer that needs high-precision weak current to detect again.
Background technology
At present, measure the high accuracy weak current and can only adopt the centre path current transducer.The measurements electric current need use caliper brake in lead, and the clamp current sensor has air-gap, and making magnetic resistance increase its certainty of measurement greatly will descend greatly with the magnetic resistance increase.And existing market does not have, but demolition, installation, high-precision again faint current sensor.
Summary of the invention
Realize that the object of the invention main technical schemes is: but the high accuracy weak current sensor ＂ of ＂ demolition, installation, and this current sensor manufacture method need not be cut iron core with the increase that causes magnetic resistance and be made its certainty of measurement decline.The high accuracy that therefore its measurement is arranged. its principle quite is the technical process that changes it, and the precision of measurement is identical with the centre path current transducer.Realize this current sensor manufacture method, be earlier 1. signal processing circuit to be reached coil 2. to carry out as requested, Fig. 1 is the magnetic conduction band with certain flexibility in the erecting bed, turn to ring structure iron core 4., in this iron core ring, the coil that ring has a current sensor 2. and the lead that will measure electric current 3..Change the width of magnetic conduction band and the sectional area that the coiling number of plies can change iron core.It is applicable to require to measure does not need frequent demolition, installation under the high accuracy weak current condition, and can't use the occasion of centre path current transducer.Same in the time need pulling down current sensor, the magnetic conduction band pulled down get final product.
Fig. 2 be in the erecting bed having the magnetic conduction band of certain lamination, build up closed loop iron core 4., in this iron core ring, the coil that ring has a current sensor 2. and the lead that will measure electric current 3..Change the width of magnetic conduction band and the sectional area that the coiling number of plies can change iron core.It is applicable to require to measure does not need frequent demolition, installation under the high accuracy weak current condition, and can't use the occasion of centre path current transducer.Same in the time need pulling down current sensor, the magnetic conduction sheet material pulled down get final product.
Embodiment
Specification Fig. 1 is exactly the schematic diagram of this current sensor embodiment, and iron core is effectively interior, and its precision reaches 0.1mA when doing dc current measurement through ￠ 40mm, and the branch variability reaches 0.02mA.
Specification Fig. 2 is the schematic diagram of this current sensor at measurement alternating current embodiment, and iron core is effectively interior, and its precision reaches 0.1mA when doing ac current measurement through ￠ 40mm, and the branch variability reaches 0.02mA.It has improved precision widely than caliper brake iron core, because increased the overlapping area between sheet.
Claims (4)
- But 1, the high accuracy weak current sensor ＂ of ＂ demolition, installation of the present invention, the manufacture method of this current sensor is, it is characterized in that described iron core, the magnetic conduction band that preferably should have certain flexibility, 4. the scene turns to ring structure iron core, and it need not cut iron core so that cause the increase of magnetic resistance that its certainty of measurement is descended.Therefore can high-precision measurement weak current.Its principle quite is the technical process that has changed it.Its principle is identical with the centre path current transducer.It has solved the condition that tested lead when requiring to install neither allows to open a way and needs high-acruracy survey.
- 2, current sensor according to claim 1 is characterized in that described iron core, preferably should have the magnetic conduction band of certain flexibility, turns to ring structure iron core 4., and magnetic resistance is little.Also have certain thickness magnetic conduction sheet material to be processed into L type, C type, U type, E type and some plug-in shapes, the iron core that on-the-spot installation is pegged graft 4..Purpose also is to reduce magnetic resistance.
- 3, current sensor according to claim 1 is characterized in that also alternating current of described current signal, also direct current.
- 4, current sensor according to claim 1 is characterized in that described iron core, and permeability magnetic material can be selected wide and thick and magnetic permeability as required, to satisfy undersaturated condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100814894A CN101436463A (en) | 2007-06-18 | 2008-02-15 | Detachable high precision feeble current sensor |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200720093966.X | 2007-06-18 | ||
| CN200720093966 | 2007-06-18 | ||
| CNA2008100814894A CN101436463A (en) | 2007-06-18 | 2008-02-15 | Detachable high precision feeble current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101436463A true CN101436463A (en) | 2009-05-20 |
Family
ID=40710852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100814894A Pending CN101436463A (en) | 2007-06-18 | 2008-02-15 | Detachable high precision feeble current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101436463A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496433A (en) * | 2011-11-23 | 2012-06-13 | 蒋勤舟 | Electronic potentiometer and calibration method thereof |
| CN103149412A (en) * | 2013-02-05 | 2013-06-12 | 王鹏 | Electric current transducer capable of being installed on line and manufacturing method |
| CN115541984A (en) * | 2022-11-30 | 2022-12-30 | 中国电力科学研究院有限公司 | Self-adaptive weak current monitoring device and monitoring method |
| CN117269852A (en) * | 2023-11-22 | 2023-12-22 | 成都汉度科技有限公司 | Fall sensor assembly convenient to disassemble and assemble, fall-type fuse and fixing method |
-
2008
- 2008-02-15 CN CNA2008100814894A patent/CN101436463A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102496433A (en) * | 2011-11-23 | 2012-06-13 | 蒋勤舟 | Electronic potentiometer and calibration method thereof |
| CN103149412A (en) * | 2013-02-05 | 2013-06-12 | 王鹏 | Electric current transducer capable of being installed on line and manufacturing method |
| CN103149412B (en) * | 2013-02-05 | 2015-02-04 | 王鹏 | Electric current transducer capable of being installed on line and manufacturing method |
| CN115541984A (en) * | 2022-11-30 | 2022-12-30 | 中国电力科学研究院有限公司 | Self-adaptive weak current monitoring device and monitoring method |
| CN117269852A (en) * | 2023-11-22 | 2023-12-22 | 成都汉度科技有限公司 | Fall sensor assembly convenient to disassemble and assemble, fall-type fuse and fixing method |
| CN117269852B (en) * | 2023-11-22 | 2024-02-06 | 成都汉度科技有限公司 | Fall sensor assembly convenient to disassemble and assemble, fall-type fuse and fixing method |
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Legal Events
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|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20090520 |