CN2722258Y - Electric current probe of optical glass without reciprocal effect - Google Patents
Electric current probe of optical glass without reciprocal effect Download PDFInfo
- Publication number
- CN2722258Y CN2722258Y CN 200420019029 CN200420019029U CN2722258Y CN 2722258 Y CN2722258 Y CN 2722258Y CN 200420019029 CN200420019029 CN 200420019029 CN 200420019029 U CN200420019029 U CN 200420019029U CN 2722258 Y CN2722258 Y CN 2722258Y
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- optical glass
- sensing head
- current sensing
- current
- electric current
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Abstract
Disclosed is an electric current probe of optical glass without reciprocal effect, comprising an electric current probe made up by optical glass and a polarized light rotary reflection device. When polarized beams are in the process of round-trip transmission in the device, all of influences to current measurement result caused by reciprocal optical parameters like linear birefringence and reflection phase shift are balanced out, but the non-reciprocal Faraday effect is doubled. So, the influences reciprocal optical parameters to the current measurement result are notablely decreased, the sensibility of electric current probe of optical glass to environmental factors like temperature, pressure, and vibration is reduced, and the stability of the current measurement system is improved. The utility model has the advantages of simple structure, low cost, double sensibility and improved stability, and can be applied to a plurality of electronic current mutual inductor with different voltage levels and rated current.
Description
Technical field
The utility model relates to a kind of no reciprocity effect optical glass current sensing head that is used on optical glass current transformer or the optical glass current sensor.
Background technology
Electronic current transducer be meant the iron-core coil that utilizes the optical device have electron device or air core coil (have or do not have embedded integrator) or have integrated load, independently or be furnished with the current-voltage converter of electron device.Wherein utilize optical device that the electronic current transducer of current sense or transmission signals is called optical current mutual inductor.The optical glass current transformer is an important kind in the optical current mutual inductor.The optical glass current sensing head is the key element of optical glass current transformer, the performance quality of the good and bad directly decision of its performance optical glass current transformer.
Existing optical glass current sensing head is because there are reciprocity factors such as linear birefrigence and reflection phase shift in its inside, makes the sensing head performance be subject to influence such as environment temperature, pressure, vibration and damages its job stability.
Summary of the invention
The purpose of this utility model is to propose a kind of influence of eliminating reciprocity factor in the optical glass current sensing head, thereby improves the no reciprocity effect optical glass current sensing head of sensing head and even whole optics vitreous electricity current transformer stability.
The utility model relates to a kind of by having optical glass current sensing head [1] and [2] two part formations of polarized light rotary reflection device that the certain thickness centre of being made into of multiple version has the hole shape structure.The effect that has the optical glass current sensing head [1] of plane of incidence [3] is to provide round light path (accompanying drawing 1 for measuring beam, 2, the dotted line that has arrow in 3 represents that promptly light path comes and goes circuit), the rotation angle that is the output polarization beam direction with intensity signals change transitions to be measured changes, and eliminates the influence of reciprocity factor simultaneously.The effect of polarized light rotary reflection device [2] is will inject the polarization direction of light beam to rotate behind 90 degree again with its reflected back sensing head.Form necessary condition for the influence of eliminating the reciprocity factor in this way.Polarized light rotary reflection device [2] is configured on the former exit plane of optical glass current sensing head [1] [4].
The related optical glass current sensing head [1] of the utility model can be the square optical glass version (as shown in Figure 1) that has three optical reflection faces; Also can be the optical glass version (as shown in Figure 2) that adopts biorthogonal (complementary reflecting prism to) reflection mode; Can also be the optical glass version (as shown in Figure 3) that adopts the reflection at critical angle mode; And everyly have other optical glass versions that can the transmission light path is provided, the intensity signals change transitions to be measured rotation angle that is the output polarization beam direction is changed for measuring beam.Polarized light rotary reflection device [2] can adopt faraday's (rotary reflection) mirror or other to have the optical device of identical polarized light rotary reflection function.
Principle of work of the present utility model is: after light beam goes into to inject optical glass current sensing head [1], through reflecting to form for several times the closed light path around electric current to be measured.Light beam is also forming the polarization rotation angle that is proportional to size of current to be measured along the sensing function of finishing in the process of this light path forward transmitted the electric current to be measured first time.Because there is the influence of reciprocity factors such as linear birefrigence and reflection phase shift in its inside, the polarization state of light beam can distort in finishing the forward transmitted process simultaneously.This light beam is injected polarized light rotary reflection device [2] after finishing forward transmitted, and 90 degree of finishing the polarization direction therein rotate and the beam reflection processes, again inject afterwards optical glass current sensing head [1] and along original optical path drive in the wrong direction be back into exit point after, transmit optical glass current sensing head [1] to form the usefulness that irradiating light beam is equipped with follow-up Polarization Detection and signal Processing.The sensing function of finishing in light beam is turned back transmission course the electric current to be measured second time also forms the polarization rotation angle that is proportional to size of current to be measured.Because magneto-optic effect has nonreciprocity, this polarization rotation angle will with the polarization rotation angle addition that forms in the sensing process first time, thereby system sensitivity is doubled; At the same time, because factors such as linear birefrigence and reflection phase shift have reciprocity, the distortion of the polarization state of light beam will be cancelled in finishing the reverse transfer process.
Reciprocity such as linear birefrigence and reflection phase shift factor itself changes very responsive to environment temperature, pressure, vibration etc., this is the basic reason of its infringement optical glass operation of current transformers stability.The utility model utilizes the polarization state rotation and the method for the transmission of turning back to eliminate the influence of reciprocity factors such as linear birefrigence and reflection phase shift, so can obviously improve the stability of optical glass operation of current transformers.
The utlity model has simple in structurely, with low cost, sensitivity doubles, and stability is advantage such as raising obviously, can be widely used on the multiple electronic current mutual inductor of each electric pressure, various rated current.
Description of drawings
Fig. 1 is by the structural representation of the square optical glass current sensing head [1] that has three optical reflection faces with the no reciprocity effect optical glass current sensing head of polarized light rotary reflection device [2] formation
The structural representation of the no reciprocity effect optical glass current sensing head that Fig. 2 is made of the optical glass current sensing head [1] and the polarized light rotary reflection device [2] that adopt biorthogonal (complementary reflecting prism to) reflection mode
Fig. 3 is by the structural representation of the optical glass current sensing head [1] that adopts the reflection at critical angle mode with the no reciprocity effect optical glass current sensing head of polarized light rotary reflection device [2] formation
Embodiment
Enforcement of the present utility model is example with accompanying drawing 1: optical glass current sensing head [1] adopts ZF-7 optical glass to make.Its physical dimension (length * wide * height) is 100mm * 100mm * 10mm, diameter of bore 80mm.Adopt faraday mirror as polarized light rotary reflection device [2].Bonding between faraday mirror frame and the optical glass current sensing head [1] with gum arabic.Incident light do up folk prescription to and plane of incidence [3] the horizontal sides direction of optical glass current sensing head [1] between angle be adjusted into 45 degree or 135 degree.The theoretical analysis, Computer Simulation and to the actual measurement of embodiment, the result shows that light beam is through in this sensing head after the round-trip transmission, the influence of reciprocity such as linear birefrigence and reflection phase shift factor can be balanced out fully, and the polarization rotation angle that is proportional to size of current to be measured is the twice of light beam folk prescription to the rotation angle of transmission formation.Therefore, the utility model can be widely used on the multiple electronic current mutual inductor of each electric pressure, various rated current.
Claims (5)
1. no reciprocity effect optical glass current sensing head, the structure that it is characterized in that it comprises optical glass current sensing head [1] and polarized light rotary reflection device [2] two parts, and wherein polarized light rotary reflection device [2] is configured on the former exit plane of optical glass current sensing head [1] [4].
2. no reciprocity effect optical glass current sensing head as claimed in claim 1, the structure type that it is characterized in that its optical glass current sensing head [1] are to adopt the square optical glass structure that has three optical reflection faces.
3. no reciprocity effect optical glass current sensing head as claimed in claim 1, the structure type that it is characterized in that its optical glass current sensing head [1] are to adopt the optical glass structure of complementary reflecting prism to the reflection mode.
4. no reciprocity effect optical glass current sensing head as claimed in claim 1, the structure type that it is characterized in that its optical glass current sensing head [1] are the optical glass structures that adopts the reflection at critical angle mode.
5. no reciprocity effect optical glass current sensing head as claimed in claim 1 is characterized in that wherein the polarized light rotary reflection device [2] of indication is a faraday rotator mirror.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019029 CN2722258Y (en) | 2004-05-28 | 2004-05-28 | Electric current probe of optical glass without reciprocal effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420019029 CN2722258Y (en) | 2004-05-28 | 2004-05-28 | Electric current probe of optical glass without reciprocal effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2722258Y true CN2722258Y (en) | 2005-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420019029 Expired - Fee Related CN2722258Y (en) | 2004-05-28 | 2004-05-28 | Electric current probe of optical glass without reciprocal effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2722258Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226817A (en) * | 2011-03-28 | 2011-10-26 | 哈尔滨工业大学 | All-optical difference current monitoring device based on optical glass structure |
| CN112771389A (en) * | 2018-09-26 | 2021-05-07 | 西门子能源全球有限公司 | Monolithic glass ring and method for optical current measurement |
-
2004
- 2004-05-28 CN CN 200420019029 patent/CN2722258Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226817A (en) * | 2011-03-28 | 2011-10-26 | 哈尔滨工业大学 | All-optical difference current monitoring device based on optical glass structure |
| CN112771389A (en) * | 2018-09-26 | 2021-05-07 | 西门子能源全球有限公司 | Monolithic glass ring and method for optical current measurement |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |