Supercharge Your Innovation With Domain-Expert AI Agents!

Solenoid nesting type all-fiber current sensor

A solenoid and all-fiber technology, applied in voltage/current isolation, measuring current/voltage, instruments, etc., can solve the problems of optical fiber bending loss and large bending birefringence effect, and reduce bending loss and birefringence effect , flexible winding method, and the effect of reducing the size of the sensor head

Inactive Publication Date: 2012-07-04
XI AN JIAOTONG UNIV
View PDF6 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that when measuring small signals, the magnetic field around the conductor is small, and the Faraday rotation angle is small; the bending loss and bending birefringence effect of the optical fiber are large

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Solenoid nesting type all-fiber current sensor
  • Solenoid nesting type all-fiber current sensor
  • Solenoid nesting type all-fiber current sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The present invention is described in further detail below in conjunction with accompanying drawing:

[0047] see Figure 4, when the traditional light-wound electric current sensor measures a small current, the magnetic field strength around the cable is very small. In order to increase the magnetic field generated by the measured current, the wire passing the measured current can be wound into a solenoid form, so that the solenoid The internal magnetic field will increase many times (related to the number of wire turns per unit length). The sensing fiber is located on the axis of the solenoid, so that the sensing fiber passes through the coil multiple times and also wraps around to form a solenoid structure, so that the Faraday rotation angle will be doubled. It is also possible to connect several solenoids in series, and the optical fibers pass through them sequentially to make the structure more symmetrical and compact. However, it should be noted that the magnetic...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a solenoid nesting type all-fiber current sensor, which comprises a light source, a polarizer, an optical fiber coupler, a sensing head, three self condenser lenses, a polarization analyzer and two optical detectors. The sensing head comprises two solenoids and sensing optical fibers located on the axes of the solenoids, the sensing optical fibers penetrate through the axes of the two solenoids so as to connect the two solenoids together, and the field directions in the solenoids along the optical wave transmission direction are identical. Each solenoid is 2000 turns, and galvanization is 1A. The two solenoids are connected together in parallel, and a distance between the two solenoids is 12cm. The core of the solenoid nesting type all-fiber current sensor is the two parallel-connected solenoids, and a coil winding mode is flexible. Therefore, compared with a fiber current sensor with a traditional optically-wound structure, the sensitivity is improved, the size of the sensing head is decreased, and due to the fact that bending radius of the optical fibers is increased, caused bending loss and bi-refraction effect are decreased.

Description

Technical field: [0001] The invention belongs to the field of electric power, and relates to an optical fiber current (small signal) sensing device, in particular to a solenoid nested all-optical fiber current sensor. Background technique: [0002] At present, the current transformer widely used in the power system is an electromagnetic current transformer. The sensor adopts the principle of electromagnetic induction, and at different voltage levels, the current of several amperes to several thousand amperes on the primary side is transformed into a zero potential state. Several amperes of current on the secondary side of the secondary side for metering, control and monitoring instruments. The electromagnetic current transformer has a simple structure, so it has high reliability and is not easy to be damaged. This is its main advantage and the main reason for its widespread use. However, due to the particularity of structure and conditions of use, it also has the following ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R15/24
Inventor 钟力生万代陈光辉于钦学
Owner XI AN JIAOTONG UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com