CN201689126U - Optical fiber fabry-perot current sensor - Google Patents
Optical fiber fabry-perot current sensor Download PDFInfo
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- CN201689126U CN201689126U CN2010202186290U CN201020218629U CN201689126U CN 201689126 U CN201689126 U CN 201689126U CN 2010202186290 U CN2010202186290 U CN 2010202186290U CN 201020218629 U CN201020218629 U CN 201020218629U CN 201689126 U CN201689126 U CN 201689126U
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- optical fiber
- perot
- current sensor
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Abstract
The utility model discloses an optical fiber fabry-perot current sensor, comprising an optical fiber and a coil which can be charged with alternating current to be tested. The utility model is characterized in that a fabry-perot cavity with gas or air as the medium is disposed at one end surface of the optical fiber; the fabry-perot cavity includes two reflective surfaces with one being the end surface of the optical fiber and the other being a film corresponding to the end surface of the optical fiber; the film is made from metallic material or non-conductive magnetic material; the coil is arranged at such a position that the magnetic line generated by passing through the alternating current to be tested is vertical to the film and can drive the film to move. Based on Hall effect, the conventional current sensor has bad sensitivity and is not capable of measuring micro current. Compared with prior art, the utility model has advantages of possessing compact structure and good stability; achieving a long-term, stable and precise measuring of alternating current; having high sensitivity and simple realization method.
Description
Technical field
The utility model relates to sensory field of optic fibre, is specifically related to a kind of optical fiber Fabry-perot current sensor.
Background technology
Be accompanied by the expansion of urban population and construction scale, the increasing of various consumers, power consumption is increasing, the frequent overload operation of the power-supply unit in city, it is more and more abominable that power utilization environment becomes, more and more serious to " test " of power supply.According to statistics, every day, consumer all will suffer the invasion of the various power issue in 120 left and right sides, electronic failure 60% from power supply.Therefore, the importance of power issue highlights day by day.Originally as the supporting role, the less power supply of fund input more and more was subjected to manufacturer and researchist's attention, and power technology develops into a brand-new technology then.
Now, slight power-supply device has merged increasing new technology.For example Switching Power Supply, hard switching, soft switch, parameter voltage stabilizing, linear feedback voltage stabilizing, magnetrol technology, numerical controlled voltage, PWM, SPWM, electromagnetic compatibility or the like.Actual demand directly promotes the continuous development and progress of power technology; in order to detect automatically and the demonstration electric current; and when taking place, harm situations such as overcurrent, overvoltage have automatic protection functions and a more senior Based Intelligent Control; power technology with sensing detection, sense samples, sensing protection gradually becomes trend, and the sensor that detects curtage just arises at the historic moment and begins to be subjected to vast power supply deviser's favor in China.
And traditional current sensor is based on Hall effect, poor sensitivity, and energy measurement Weak current not.
Summary of the invention
Problem to be solved in the utility model is: how a kind of optical fiber Fabry-perot current sensor is provided, and this sensor can overcome the defective of prior art, can realize long-term stability, measure exchange current accurately.
The technical matters that the utility model proposed is to solve like this: a kind of optical fiber Fabry-perot current sensor is provided, comprise optical fiber and the coil that can feed exchange current to be measured, it is characterized in that: being provided with one at an end face of optical fiber is the enamel amber chamber of medium with gas or air, described enamel amber chamber comprises two reflectings surface, a reflecting surface is the end face of optical fiber, another reflecting surface is and the corresponding diaphragm of fiber end face, described diaphragm is made of metal material or nonconducting magnetic material, described coil that the magnetic line of force that is produced when the position can make it by exchange current to be measured is set is vertical with diaphragm and can drive motion of membrane.
According to optical fiber Fabry-perot current sensor provided by the utility model, it is characterized in that, the xsect in described enamel amber chamber greater than, be equal to or less than the xsect of the fibre core of optical fiber.
According to optical fiber Fabry-perot current sensor provided by the utility model, it is characterized in that described enamel amber chamber is to constitute with the diaphragm that is docked at fiber end face by being arranged on the inner RC cylindrical microflute of fiber end face.
According to optical fiber Fabry-perot current sensor provided by the utility model, it is characterized in that described enamel amber chamber is to be made of the end face of optical fiber, the diaphragm that is set in the sleeve pipe on the optical fiber and is arranged on the sleeve pipe other end.
According to optical fiber Fabry-perot current sensor provided by the utility model, it is characterized in that, described coil be nested with on the excircle in enamel amber chamber or be arranged on enamel amber chamber under.
According to optical fiber Fabry-perot current sensor provided by the utility model, it is characterized in that described optical fiber is the single-mode fiber that adopts quartz, polymkeric substance, jewel or photon crystal material to make.
The utility model feeds tested exchange current in the coil when measuring, the magnetic field interaction that magnetic field that coil changes and diaphragm mesoscale eddies electric current produce, thereby the chamber that drives motion of membrane change enamel amber chamber is long, catoptrics signal with optical pickup enamel amber chamber obtains chamber long letter breath, just can realize the measurement to exchange current.The thickness of diaphragm and the dimension adjustable sensitivity of FP chamber.
Traditional current sensor is based on Hall effect, poor sensitivity, and energy measurement Weak current not, and the utility model is realized cramped construction, good stability, can realize long-term stability, measure exchange current accurately, and sensitivity is very high, implementation method is also very simple.
Description of drawings
Fig. 1 is the structural representation of first kind of embodiment of the utility model;
Fig. 2 is the structural representation of second kind of embodiment of the utility model;
Fig. 3 is the structural representation of the third embodiment of the utility model;
Fig. 4 is the structural representation of the 4th kind of embodiment of the utility model.
Wherein, 1, optical fiber, 2, diaphragm, 3, cylindrical microflute, 4, coil, 5, enamel amber chamber, 6, glue layer, 7, sleeve pipe.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described:
As Fig. 1～shown in Figure 4, one is that medium comprises the enamel amber chamber that two optical reflection faces constitute with gas or air, one end in enamel amber chamber is a diaphragm, this diaphragm is made of metal material or nonconducting magnetic material, constitute optical fiber Fabry-perot current sensor of the present utility model with one group of coil combination, the thickness of diaphragm and the dimension adjustable sensitivity of FP chamber, when measuring, tested exchange current is fed in the coil, the magnetic field interaction that magnetic field that coil changes and diaphragm mesoscale eddies electric current produce, thereby the chamber that drives motion of membrane change FP chamber is long, catoptrics signal with optical pickup FP chamber obtains chamber long letter breath, just can realize the measurement to exchange current, the material that constitutes the FP chamber can be quartzy, jewel, microstructured optical fibers etc.
As shown in Figure 1, comprise optical fiber 1 and the coil 2 that can feed exchange current to be measured, end face at optical fiber 1 is provided with cylindrical microflute 3, the degree of depth is between 10 μ m to 10mm, butt joint forms enamel amber chamber with the corresponding diaphragm 2 of fiber end face outside cylindrical microflute 3, diaphragm 2 is made of metal material or nonconducting magnetic material, coil 2 the position is set with below diaphragm is vertical.The preparation method is with cylindrical microflute 3 of 157nm laser instrument processing on the end face of optical fiber 1, between the degree of depth 10 μ m to 10mm, butt joint upper diaphragm 2 outside cylindrical microflute 3, microflute 3 forms the FP chamber, place one group of coil 4 in the vertical lower of diaphragm 2, just made Fabry-perot optical fiber current sensor of the present utility model.
As shown in Figure 2, comprise optical fiber 1 and the coil 2 that can feed exchange current to be measured, enamel amber chamber 5 be by the end face of optical fiber, be set in the sleeve pipe 7 on the optical fiber 1 and be arranged on the cover 7 the pipe other ends diaphragms 2 constitute, described diaphragm is made of metal material or nonconducting magnetic material, and coil 4 is placed on the vertical lower of diaphragm 2.The preparation method is: 7 liang of end-grain cutting of sleeve pipe are flat, end butt joint upper diaphragm 2 at sleeve pipe 7, optical fiber 1 is inserted in the sleeve pipe 7, and and diaphragm 2 keep small distance, form enamel amber chamber 5, fixing with glue layer 6, place one group of coil 4 in the vertical lower of diaphragm 2, just made Fabry-perot optical fiber current sensor of the present utility model.
As shown in Figure 3, structure is identical with embodiment 1 with the preparation method, have only coil 4 be set in enamel amber chamber around.
As shown in Figure 4, structure is identical with embodiment 2 with the preparation method, have only coil 4 be set in enamel amber chamber around.
Claims (6)
1. optical fiber Fabry-perot current sensor, comprise optical fiber and the coil that can feed exchange current to be measured, it is characterized in that: being provided with one at an end face of optical fiber is the enamel amber chamber of medium with gas or air, described enamel amber chamber comprises two reflectings surface, a reflecting surface is the end face of optical fiber, another reflecting surface is and the corresponding diaphragm of fiber end face, described diaphragm is made of metal material or nonconducting magnetic material, described coil that the magnetic line of force that is produced when the position can make it by exchange current to be measured is set is vertical with diaphragm and can drive motion of membrane.
2. optical fiber Fabry-perot current sensor according to claim 1 is characterized in that, the xsect in described enamel amber chamber greater than, be equal to or less than the xsect of the fibre core of optical fiber.
3. optical fiber Fabry-perot current sensor according to claim 2 is characterized in that, described enamel amber chamber is to constitute with the diaphragm that is docked at fiber end face by being arranged on the inner RC cylindrical microflute of fiber end face.
4. optical fiber Fabry-perot current sensor according to claim 2 is characterized in that, described enamel amber chamber is to be made of the end face of optical fiber, the diaphragm that is set in the sleeve pipe on the optical fiber and is arranged on the sleeve pipe other end.
5. optical fiber Fabry-perot current sensor according to claim 1 is characterized in that, described coil be nested with on the excircle in enamel amber chamber or be arranged on enamel amber chamber under.
6. according to the arbitrary described optical fiber Fabry-perot current sensor of claim 1～4, it is characterized in that described optical fiber is the single-mode fiber that adopts quartz, polymkeric substance, jewel or photon crystal material to make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202186290U CN201689126U (en) | 2010-06-08 | 2010-06-08 | Optical fiber fabry-perot current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202186290U CN201689126U (en) | 2010-06-08 | 2010-06-08 | Optical fiber fabry-perot current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201689126U true CN201689126U (en) | 2010-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202186290U Expired - Fee Related CN201689126U (en) | 2010-06-08 | 2010-06-08 | Optical fiber fabry-perot current sensor |
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| Country | Link |
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| CN (1) | CN201689126U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871959A (en) * | 2010-06-08 | 2010-10-27 | 电子科技大学 | Optical fiber Fabry-perot current sensor and preparation method thereof |
| CN102193074A (en) * | 2011-03-15 | 2011-09-21 | 中国科学技术大学 | Magnetic-field measurement device and manufacturing method thereof as well as magnetic-field measurement method |
-
2010
- 2010-06-08 CN CN2010202186290U patent/CN201689126U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871959A (en) * | 2010-06-08 | 2010-10-27 | 电子科技大学 | Optical fiber Fabry-perot current sensor and preparation method thereof |
| CN101871959B (en) * | 2010-06-08 | 2012-06-27 | 电子科技大学 | Optical fiber Fabry-perot current sensor and preparation method thereof |
| CN102193074A (en) * | 2011-03-15 | 2011-09-21 | 中国科学技术大学 | Magnetic-field measurement device and manufacturing method thereof as well as magnetic-field measurement method |
| CN102193074B (en) * | 2011-03-15 | 2013-05-29 | 中国科学技术大学 | Magnetic-field measurement device and manufacturing method thereof as well as magnetic-field measurement method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101229 Termination date: 20130608 |