CN102866280B - Magnetostrictive open circuit optical control device - Google Patents
Magnetostrictive open circuit optical control device Download PDFInfo
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- CN102866280B CN102866280B CN201210316484.1A CN201210316484A CN102866280B CN 102866280 B CN102866280 B CN 102866280B CN 201210316484 A CN201210316484 A CN 201210316484A CN 102866280 B CN102866280 B CN 102866280B
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- open circuit
- spherical reflector
- magnetostriction materials
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Abstract
The invention provides a magnetostrictive open circuit optical control device, and relates to the field of magnetostrictive effect optical current transformers. Problems that the conventional magnetostrictive transformer is complex in signal processing and circuit structure, and false operation or refusal operation is caused easily are solved. The magnetostrictive open circuit optical control device comprises a sensing head made of a magnetostrictive material, a sensing head spherical reflector, a laser detector and a parallel reflector, wherein the bottom surface of the sensing head spherical reflector is fixed on the upper end surface of the sensing head made of the magnetostrictive material and is connected with the sensing head made of the magnetostrictive material to form a whole; the laser detector is arranged over the sensing head spherical reflector; the parallel reflector is arranged in a light path between the reflecting light of the sensing head spherical reflector and the incident light of the laser detector; the distance between the parallel reflector and the axle center of the sensing head made of the magnetostrictive material is L; and an electric signal output end of the laser detector is an open circuit starting signal output end of the magnetostrictive open circuit optical control device. The magnetostrictive open circuit optical control device is applicable to the field of magnetostrictive effect optical current transformers.
Description
Technical field
The present invention relates to magnetostrictive effect optical current mutual inductor field.
Background technology
The existing protection of the mutual inductor based on magnetostriction principle partial design is all when bus is short-circuited; its electric current flow through will become and exceedes normal value greatly; the mechanical deformation that rare earth ultra-magnetostriction material produces converts electric signal to through measurement; electric signal is analyzed after being sent to control circuit; chopping signal is produced when confirming short circuit; final electric signal acts on isolating switch and carries out open circuit; need the process of signal comparatively complicated in this process; some errors of easy generation cause misoperation or refused action, and the circuit structure needed is also very complicated.
Summary of the invention
The object of the invention is the process complexity in order to solve existing magnetostrictive transducer signal and circuit structure complexity, easily producing the problem of misoperation or refused action, the device that a kind of magnetostrictive open circuit optical controls is provided.
The device that magnetostrictive open circuit optical controls, it comprises the sensing head of magnetostriction materials, sensing head spherical reflector, laser detector and parallel mirror, the sensing head of described magnetostriction materials is right cylinder, sensing head spherical reflector is hemisphere, and the radius of sphericity of sensing head spherical reflector is identical with the end face radius of a circle of the sensing head of magnetostriction materials, the sensing head of sensing head spherical reflector and magnetostriction materials is coaxially arranged, the bottom surface of sensing head spherical reflector is fixed on the upper surface of the sensing head of magnetostriction materials and connects into as a whole with the sensing head of magnetostriction materials, the photosurface facing sensing head spherical reflector of laser detector is arranged on directly over described sensing head spherical reflector, parallel mirror is arranged in the light path between the reflected light of sensing head spherical reflector and the incident light of laser detector, and the distance between the axle center of the sensing head of parallel mirror and magnetostriction materials is L, the electrical signal of laser detector is the output terminal of the open circuit enabling signal of the device that magnetostrictive open circuit optical controls,
The linear relationship of length when length when normally being run by rare earth ultra-magnetostriction material and short circuit, select a length as trigger point, when short circuit, rare earth ultra-magnetostriction material will be encountered trigger point and cause triggering, and then this triggers and directly acts on isolating switch and carry out open circuit;
Laser will be can't detect inject when electric current is in normal condition laser detector, thus not send short-circuit signal; When electric current exceedes short-circuit current trigger value, laser scanning scope will contain detector, and laser detector detects that laser is injected, thus generation chopping signal is sent to isolating switch, carries out open circuit.
The distortion measurement of rare earth ultra-magnetostriction material during short circuit simplifies by the present invention, then deformation signal is acted on open circuit, dispenses middle complicated signal conversion process and deterministic process.
Because rare earth ultra-magnetostriction material has the good linearity under certain condition, namely its volume relative change rate is directly proportional to the size in mutual inductance magnetic field, the linear relationship of length when length when normally being run by rare earth ultra-magnetostriction material and short circuit, select a length as trigger point, when short circuit, rare earth ultra-magnetostriction material will be encountered trigger point and cause triggering, and then this triggers and directly acts on isolating switch and carry out open circuit.
Laser will be can't detect inject when electric current is in normal condition laser detector, thus not send short-circuit signal; When electric current exceedes short-circuit current trigger value, laser scanning scope will contain detector, and detector detects that laser is injected, thus generation chopping signal is sent to isolating switch, carries out open circuit.
It is simple that the present invention has structure, to fault current fast response time, introduces error few in processing procedure, the advantage that reliability is high.
Accompanying drawing explanation
The contrast schematic diagram that Fig. 1 is the present invention before and after off state change, in figure, solid line represents the state of magnetostriction materials sensing head before open circuit, and in figure, dotted line represents the state triggering open circuit magnetostriction materials sensing head.
Embodiment
Embodiment one: composition graphs 1 illustrates present embodiment, the device that magnetostrictive open circuit optical described in present embodiment controls, it comprises the sensing head 1 of magnetostriction materials, sensing head spherical reflector 2, laser detector 3 and parallel mirror 4, the sensing head 1 of described magnetostriction materials is right cylinder, sensing head spherical reflector 2 is hemisphere, and the radius of sphericity of sensing head spherical reflector 2 is identical with the end face radius of a circle of the sensing head 1 of magnetostriction materials, sensing head spherical reflector 2 is coaxially arranged with the sensing head 1 of magnetostriction materials, the bottom surface of sensing head spherical reflector 2 is fixed on the upper surface of the sensing head 1 of magnetostriction materials and connects into as a whole with the sensing head 1 of magnetostriction materials, the photosurface facing sensing head spherical reflector 2 of laser detector 3 is arranged on directly over described sensing head spherical reflector 2, parallel mirror 4 is arranged in the light path between the reflected light of sensing head spherical reflector 2 and the incident light of laser detector 3, and the distance between the axle center of the sensing head 1 of parallel mirror 4 and magnetostriction materials is L, the electrical signal of laser detector 3 is the output terminal of the open circuit enabling signal of the device that magnetostrictive open circuit optical controls.
When electric current is in range of normal value, magnetostriction materials constantly will stretch within the scope of certain amplitude, and laser beam will be also certain in the sweep limit of projection area after two secondary reflections.When there being electric current to pass through, described magnetostriction materials sensing head 1 occurs of reciprocating vibration, drive described sensing head spherical reflector 2 simultaneously, the size of its vibration and the current related of measurement, when incident beam is irradiated on described sensing head spherical reflector 2, be reflected to above described horizontal reflection mirror 4 again, when electric current is in range of normal value, magnetostriction materials constantly will stretch within the scope of certain amplitude, laser beam will be also certain in the sweep limit of projection area after two secondary reflections, light beam can not secondary reflect on described laser detector 3 from described horizontal reflection mirror 4, when there is excess current, described sensing head 1 amplitude increases, drive described sensing head spherical reflective surface 2 amplitude excessive, light beam irradiation after being reflected by described horizontal reflection mirror 4 this is on described laser detector 3, now there is protection act, cut off electric current.
Sensing head spherical reflector 2 also can adopt plane mirror, when adopting plane mirror, no matter magnetostriction materials extend or normal condition, and its reflection angle is all constant, its advantage be the displacement in incident point and magnetostriction materials length be changing into linear relationship; When adopting spherical reflector, its reflection angle changes along with the length of magnetostriction materials, and length is shorter, and reflection angle is larger, and its advantage is that incident point displacement is larger; Design original intention due to reflecting surface is amplified length of material variable quantity, and incident point displacement is larger, measures more accurate; And the incident point displacement of known described sensing head ball mirror 2 will, much larger than sensing head plane mirror, namely adopt described sensing head spherical reflector 2 higher than the sensitivity of sensing head plane mirror by experiment.
Embodiment two: the difference of the device that magnetostrictive open circuit optical controls described in present embodiment and embodiment one is, it also comprises counter, the input end of described counter is communicated with the electrical signal of laser detector 3, and the output terminal of counter is the output terminal of the open circuit enabling signal of the device that magnetostrictive open circuit optical controls.
Some non-faulting momentary currents may be there are when considering operation of power networks excessive, connect counter at the electrical signal of laser detector 3, after N laser scanning number of times being detected, just send short-circuit signal, N be greater than 1 integer; Avoid the generation of misoperation.
Embodiment three: present embodiment is the further restriction of device controlled magnetostrictive open circuit optical described in embodiment one, the sensing head 1 of magnetostriction materials be adopt length to be the right cylinder realization of 200mm.
Embodiment four: present embodiment is the further restriction to the device that magnetostrictive open circuit optical described in embodiment one controls, and the sensing head 1 of magnetostriction materials adopts rare earth ultra-magnetostriction material Tb
0.27dy
0.73fe
2realize.
Embodiment five: present embodiment is the further restriction of device controlled magnetostrictive open circuit optical described in embodiment one, sensing head spherical reflector 2 adopts spherical radius to be the spherical mirror of 17.5cm.
Embodiment six: present embodiment is the further restriction to the device that magnetostrictive open circuit optical described in embodiment one controls, and the distance L between the axle center of parallel mirror 4 and described magnetostriction materials sensing head 1 is 400mm.
Because laser projection district scope is 500 ~ 670mm, plane mirror makes laser projection district be transferred to 130 ~ 300mm.
Claims (6)
1. the device of magnetostrictive open circuit optical control, it is characterized in that, it comprises the sensing head (1) of magnetostriction materials, sensing head spherical reflector (2), laser detector (3) and parallel mirror (4), the sensing head (1) of described magnetostriction materials is right cylinder, sensing head spherical reflector (2) is hemisphere, and the radius of sphericity of sensing head spherical reflector (2) is identical with the end face radius of a circle of the sensing head (1) of magnetostriction materials, sensing head spherical reflector (2) is coaxially arranged with the sensing head (1) of magnetostriction materials, the bottom surface of sensing head spherical reflector (2) is fixed on the upper surface of the sensing head (1) of magnetostriction materials and connects into as a whole with the sensing head (1) of magnetostriction materials, photosurface facing sensing head spherical reflector (2) of laser detector (3) is arranged on directly over described sensing head spherical reflector (2), parallel mirror (4) is arranged in the light path between the reflected light of sensing head spherical reflector (2) and the incident light of laser detector (3), and the distance between the axle center of the sensing head (1) of parallel mirror (4) and magnetostriction materials is L, the electrical signal of laser detector (3) is the output terminal of the open circuit enabling signal of the device that magnetostrictive open circuit optical controls,
The linear relationship of length when length when normally being run by rare earth ultra-magnetostriction material and short circuit, select a length as trigger point, when short circuit, rare earth ultra-magnetostriction material will be encountered trigger point and cause triggering, and then this triggers and directly acts on isolating switch and carry out open circuit;
Laser will be can't detect inject when electric current is in normal condition laser detector (3), thus not send short-circuit signal; When electric current exceedes short-circuit current trigger value, laser scanning scope will contain detector, and laser detector (3) detects that laser is injected, thus generation chopping signal is sent to isolating switch, carries out open circuit.
2. the device of magnetostrictive open circuit optical control according to claim 1, it is characterized in that, it also comprises counter, the input end of described counter is communicated with the electrical signal of laser detector (3), and the output terminal of counter is the output terminal of the open circuit enabling signal of the device that magnetostrictive open circuit optical controls.
3. the device of magnetostrictive open circuit optical control according to claim 1, is characterized in that, sensing head (1) the employing length of magnetostriction materials is the right cylinder realization of 200mm.
4. the device of magnetostrictive open circuit optical control according to claim 1, is characterized in that, the sensing head (1) of magnetostriction materials adopts rare earth ultra-magnetostriction material Tb
0.27dy
0.73fe
2realize.
5. the device of magnetostrictive open circuit optical control according to claim 1, is characterized in that, sensing head spherical reflector (2) adopts spherical radius to be the spherical mirror of 17.5cm.
6. the device of magnetostrictive open circuit optical control according to claim 1, it is characterized in that, the distance L between the axle center of parallel mirror (4) and described magnetostriction materials sensing head (1) is 400mm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210316484.1A CN102866280B (en) | 2012-08-31 | 2012-08-31 | Magnetostrictive open circuit optical control device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210316484.1A CN102866280B (en) | 2012-08-31 | 2012-08-31 | Magnetostrictive open circuit optical control device |
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| CN102866280A CN102866280A (en) | 2013-01-09 |
| CN102866280B true CN102866280B (en) | 2015-03-11 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862436A (en) * | 2006-06-19 | 2006-11-15 | 北京航空航天大学 | Fast mirror real-time active vibration control system based on DSP |
| CN201382897Y (en) * | 2008-11-21 | 2010-01-13 | 北京化工大学 | Device for improving measurement of Michelson interferometer on magnetostriction constant |
| CN101672865A (en) * | 2009-08-20 | 2010-03-17 | 上海华魏光纤传感技术有限公司 | Novel optical fibre current sensor system |
| CN202255291U (en) * | 2011-05-09 | 2012-05-30 | 重庆师范大学 | Intellectual detection system for magnetostrictive effect |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100977169B1 (en) * | 2006-07-10 | 2010-08-20 | 주식회사 필룩스 | Device and method for controlling feeding current of load |
| US8284534B2 (en) * | 2007-10-30 | 2012-10-09 | Freescale Semiconductor, Inc. | Overcurrent protection circuit, integrated circuit, apparatus and computer program product |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1862436A (en) * | 2006-06-19 | 2006-11-15 | 北京航空航天大学 | Fast mirror real-time active vibration control system based on DSP |
| CN201382897Y (en) * | 2008-11-21 | 2010-01-13 | 北京化工大学 | Device for improving measurement of Michelson interferometer on magnetostriction constant |
| CN101672865A (en) * | 2009-08-20 | 2010-03-17 | 上海华魏光纤传感技术有限公司 | Novel optical fibre current sensor system |
| CN202255291U (en) * | 2011-05-09 | 2012-05-30 | 重庆师范大学 | Intellectual detection system for magnetostrictive effect |
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