CN2651761Y - Sensing head of small polarization analysis magneto-optic magnetic field sensor - Google Patents
Sensing head of small polarization analysis magneto-optic magnetic field sensor Download PDFInfo
- Publication number
- CN2651761Y CN2651761Y CN 03277422 CN03277422U CN2651761Y CN 2651761 Y CN2651761 Y CN 2651761Y CN 03277422 CN03277422 CN 03277422 CN 03277422 U CN03277422 U CN 03277422U CN 2651761 Y CN2651761 Y CN 2651761Y
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- optical
- input end
- light beam
- sleeve pipe
- magnetic field
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Abstract
The utility model relates to a minisize polarization analysis magnetic and optical magnetic field sensor sensing head based on Faraday magnetic optical effect, which comprises an input end component 1, an output end component 3, an optical component 2 and a connection component 4. The input end component is composed of an input optical fiber 11, a single optical fiber cilia 12, a collimating lens 13 and an input end sleeve 14; the output end component is composed of two output optical fibers 31, a double optical fiber cilia 32, a collimating lens 33 and an output end sleeve 34; the optical component is composed of a light beam polarizer 21, a Faraday rotation piece 22 and a light beam polarization analyzer 23, which are arranged in sequence between the input end component and the output end component; the input end component and the output end component are inserted in the connection component. Therefore, the utility model, which is able to counteract electromagnetic disturbance and realize real time measurement, has the advantages of simple and compact structure, small size, easy calibration and low cost.
Description
Technical field:
The utility model relates to a kind of magnetic field sensing device based on magneto-optic effect of miniaturization polarization analysis type.Particularly relate to a kind of miniaturization polarization analysis magneto-optical fibre optic magnetic field sensor sensing head of realizing magnetic field or current measurement based on Faraday magnetooptical effect.
Background technology:
The fibre-optic current or the magnetic field sensing device that detect magnetic field or electric current with magneto-optic effect are the directions of recent each company's development of new fiber optic sensing device.The magneto-optical Fibre Optical Sensor has sensing head volume little (with respect to other technology), passive measurement, the characteristics that are not subjected to that magnetic saturation influences etc.Transducing signal can fundamentally provide high-tension isolation by Optical Fiber Transmission.
Fibre optic magnetic field sensor sensing head commonly used at present is a full fiber type.Full fiber type directly utilizes the Faraday effect of optical fiber itself to carry out the magneto-optic conversion.This type optical fiber magnetic field sensor sensing head complex structure, volume is big, is difficult for adjustment.The sensor of full fiber type wants coiled fiber optic coils volume also bigger.And because the extraordinary low birefringent fiber making of using as sensing is difficult, cost is higher.Therefore use not too extensive at present.
Summary of the invention:
The purpose of this utility model is to overcome above-mentioned deficiency, provide a kind of compact conformation, volume little, be easy to adjustment cost and cheap miniaturization polarization analysis magneto-optical magnetic field sensor sensing head.
The purpose of this utility model is achieved in that a kind of miniaturization polarization analysis magneto-optical magnetic field sensor sensing head, it comprises input end assembly, cap assembly, optical element assembly and coupling assembling, the input end assembly comprises input optical fibre, single fiber kapillary, collimation lens and input end sleeve pipe, single fiber kapillary and collimation lens are forward and backward to be inserted in the input end sleeve pipe, and the input optical fibre rear end is inserted in the single fiber kapillary; Cap assembly comprises two output optical fibres, two optical fiber kapillary, collimation lens and output terminal sleeve pipe, collimation lens and two the optical fiber kapillary is forward and backward is inserted in the output terminal sleeve pipe, and two output optical fibre front ends are inserted in two optical fiber kapillaries; The optical element assembly comprises the light beam polarizer, faraday's revolving fragment and light beam polarization analyzer, and the three is arranged in order between input end assembly and cap assembly; Input end assembly and cap assembly are inserted in the coupling assembling.
Light beam polarization analyzer of the present utility model is made up of the wollaston prism group, the wollaston prism group is made up of 90 ° of uniaxial crystal angle of wedge sheets and 180 ° of uniaxial crystal angle of wedge sheets, the optical axis direction of wollaston prism group and light beam polarizer polarization direction angle at 45.
Light becomes linearly polarized light from input end fiber after the collimation lens collimation enters the light beam polarizer, under the action of a magnetic field, produce the plane of polarization rotation after entering faraday's revolving fragment, enter Wollaston mirror group and produce the mutually perpendicular linearly polarized light in two bundle polarization directions, enter output terminal respectively.The magnetic field intensity difference, the varying in size of the light intensity of output terminal.Measure the luminous power of output terminal, can be by the intensity of measuring magnetic field.
Because the measured modulation of the utility model realizes with faraday's rotatory device, the signal Optical Fiber Transmission, these devices are compared with traditional electromagnetism method of testing, can work under strong-electromagnetic field.The signal Sensitive Apparatus is connected with optical fiber with disposal system, has avoided electron device closely from test site like this, also can accomplish real-time monitoring by optical fiber.Because used optical fiber and optical device volume are very little, the total volume of the sensing head of composition is very little.
Compared with prior art, the utlity model has following advantage: anti-electromagnetic interference (EMI), measure in real time, volume simple and compact for structure is little, be easy to adjustment and with low cost, so application prospect is wider.
Description of drawings:
Fig. 1 is a section of structure of the present utility model.
Fig. 2 is a light path synoptic diagram of the present utility model.
Embodiment:
As Fig. 1, the utility model is a kind of miniaturization polarization analysis magneto-optical magnetic field sensor sensing head.It mainly is made up of input end assembly 1, cap assembly 3, optical element assembly 2 and coupling assembling 4.Input end assembly 1 and cap assembly 3 are inserted in the coupling assembling 4.
Input end assembly 1 is made up of input optical fibre 11, single fiber kapillary 12, collimation lens 13 and input end sleeve pipe 14.Single fiber kapillary 12 and collimation lens 13 forward and backward being inserted in the input end sleeve pipe 14, input optical fibre 11 rear ends are inserted in the single fiber kapillary 12.Single fiber kapillary 12 is used for fixing input optical fibre 11, and input end sleeve pipe 14 is used for fixing collimation lens 13 and single fiber kapillary 12, and collimation lens 13 is used for the light beam of collimating optical fibre input.
Cap assembly 3 is made up of two output optical fibres 31, two optical fiber kapillary 32, collimation lens 33 and output terminal sleeve pipe 34.Collimation lens 33 and two optical fiber kapillary 32 forward and backward being inserted in the output terminal sleeve pipe 34, two output optical fibre 31 front ends are inserted in two optical fiber kapillaries 32.Two optical fiber kapillaries 32 are used for fixing two output optical fibres 31, and output terminal sleeve pipe 34 is used for fixing this collimation lens 33 and two optical fiber kapillaries 32, collimation lens 33 in order to convergent beam to these two output optical fibres 31.
Internal core optical element assembly 2 of the present utility model is taken over 24 by the light beam polarizer 21, faraday's revolving fragment 22, light beam polarization analyzer 23 and short glass and is formed.The light beam polarizer 21, faraday's revolving fragment 22 and light beam polarization analyzer 23 are arranged in order between input end assembly 1 and cap assembly 3.The light beam polarizer 21, faraday's revolving fragment 22 and light beam polarization analyzer 23 bond together successively.Short glass is taken over 24 and is linked to each other with input end sleeve pipe 14 rear ends, light beam polarization analyzer 43 front end faces with lack glass and take over 24 rear end faces and bond together.
Coupling assembling 4 is made up of anterior cannula 41, rear sleeve 43 and total sleeve pipe 42.Input end sleeve pipe 14 is inserted in the anterior cannula 41, and output terminal sleeve pipe 34 is inserted in the rear sleeve 43, and anterior cannula 41 and rear sleeve 43 are inserted in total sleeve pipe 42.
As Fig. 2, the light beam polarizer 21 and faraday's revolving fragment 22 are made up of single piece of material.Light beam polarization analyzer 23 is made up of wollaston prism group or other polarization beam apparatus.The wollaston prism group is made up of 90 ° of uniaxial crystal angle of wedge sheets 231 and 180 ° of uniaxial crystal angle of wedge sheets 232.Angle at 45, the polarization direction of the optical axis direction of wollaston prism group and the light beam polarizer 21.Light beam is free position a by the light beam polarizer 21 preceding plane of polarizations, and light beam is by the light beam polarizer 21 backs direction polarization b at 45.During by faraday's revolving fragment 22, polarization state rotates c under the action of a magnetic field.The polarization state variation is converted to the different two-beam of light intensity by light beam polarization analyzer 23, and its polarization direction is d.
Claims (5)
1, a kind of miniaturization polarization analysis magneto-optical magnetic field sensor sensing head, it is characterized in that it comprises input end assembly (1), cap assembly (3), optical element assembly (2) and coupling assembling (4), input end assembly (1) comprises input optical fibre (11), single fiber kapillary (12), collimation lens (13) and input end sleeve pipe (14), single fiber kapillary (12) and collimation lens (13) are forward and backward to be inserted in the input end sleeve pipe (14), and input optical fibre (11) rear end is inserted in the single fiber kapillary (12); Cap assembly (3) comprises two output optical fibres (31), two optical fiber kapillary (32), collimation lens (33) and output terminal sleeve pipe (34), collimation lens (33) and two optical fiber kapillary (32) is forward and backward is inserted in the output terminal sleeve pipe (34), two output optical fibres (31) front end is inserted in two optical fiber kapillaries (32); Optical element assembly (2) comprises the light beam polarizer (21), faraday's revolving fragment (22) and light beam polarization analyzer (23), and the three is arranged in order between input end assembly (1) and cap assembly (3); Input end assembly (1) and cap assembly (3) are inserted in the coupling assembling (4).
2, a kind of miniaturization polarization analysis magneto-optical magnetic field sensor sensing head according to claim 1, it is characterized in that light beam polarization analyzer (23) is made up of the wollaston prism group, the wollaston prism group is made up of 90 ° of uniaxial crystal angle of wedge sheets (231) and 180 ° of uniaxial crystal angle of wedge sheets (232), the optical axis direction of wollaston prism group and the light beam polarizer (21) polarization direction angle at 45.
3, a kind of miniaturization polarization analysis magneto-optical magnetic field sensor sensing head according to claim 1 and 2 is characterized in that the light beam polarizer (21), faraday's revolving fragment (22) and light beam polarization analyzer (23) bond together successively.
4, a kind of miniaturization polarization analysis magneto-optical magnetic field sensor sensing head according to claim 3, it is characterized in that optical element assembly (2) comprises that also one takes over (24), take over (24) and link to each other with input end sleeve pipe (14), light beam polarization analyzer (43) front end face and adapter (3) rear end face bond together.
5, a kind of miniaturization polarization analysis magneto-optical magnetic field sensor sensing head according to claim 1 and 2, it is characterized in that coupling assembling (2) comprises anterior cannula (21), rear sleeve (23) and total sleeve pipe (22), input end sleeve pipe (14) is inserted in the anterior cannula (21), output terminal sleeve pipe (54) is inserted in the rear sleeve (23), and anterior cannula (21) and rear sleeve (23) are inserted in total sleeve pipe (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03277422 CN2651761Y (en) | 2003-08-06 | 2003-08-06 | Sensing head of small polarization analysis magneto-optic magnetic field sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03277422 CN2651761Y (en) | 2003-08-06 | 2003-08-06 | Sensing head of small polarization analysis magneto-optic magnetic field sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2651761Y true CN2651761Y (en) | 2004-10-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03277422 Expired - Fee Related CN2651761Y (en) | 2003-08-06 | 2003-08-06 | Sensing head of small polarization analysis magneto-optic magnetic field sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2651761Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183735A (en) * | 2011-03-04 | 2011-09-14 | 北京交通大学 | Space magnetic field detector |
| CN112698252A (en) * | 2020-12-10 | 2021-04-23 | 中国人民解放军国防科技大学 | Optical fiber vector magnetic field sensor based on polarization maintaining optical fiber transmission and polarization detection method |
-
2003
- 2003-08-06 CN CN 03277422 patent/CN2651761Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102183735A (en) * | 2011-03-04 | 2011-09-14 | 北京交通大学 | Space magnetic field detector |
| CN112698252A (en) * | 2020-12-10 | 2021-04-23 | 中国人民解放军国防科技大学 | Optical fiber vector magnetic field sensor based on polarization maintaining optical fiber transmission and polarization detection method |
| CN112698252B (en) * | 2020-12-10 | 2022-05-03 | 中国人民解放军国防科技大学 | Optical fiber vector magnetic field sensor based on polarization maintaining optical fiber transmission and polarization detection method |
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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 |