CN201100865Y - Small current low voltage optical grating sensor - Google Patents
Small current low voltage optical grating sensor Download PDFInfo
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- CN201100865Y CN201100865Y CNU2007200972615U CN200720097261U CN201100865Y CN 201100865 Y CN201100865 Y CN 201100865Y CN U2007200972615 U CNU2007200972615 U CN U2007200972615U CN 200720097261 U CN200720097261 U CN 200720097261U CN 201100865 Y CN201100865 Y CN 201100865Y
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- fiber
- piezoelectric ceramics
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Abstract
The utility model relates to an optical fiber grating sensor with little current flow and low voltage, which comprises a light source, an optical coupler, an optical fiber grating, a piezoelectric ceramic and a signal demodulator, wherein the light source is connected with the input end of the optical coupler through transmission optical fiber, an output end of the optical coupler is connected with the optical fiber grating which is arranged on the piezoelectric ceramic in parallel through transmission optical fiber, and the other end of the optical coupler is connected with the signal demodulator through the transmission optical fiber, and the other end of the optical fiber grating is a gathering end of measured electrical signal, and the piezoelectric ceramic is connected with the positive and the negative poles of the measured electrical signal. The optical fiber grating can be fixedly arranged on the piezoelectric ceramic in parallel, and also can be vertically and fixedly arranged on the piezoelectric ceramic. The piezoelectric ceramic is constituted by metal thin plates and piezoelectric ceramic plates which are coated on the metal thin plates. The optical fiber grating sensor has the advantages of small volume, light weight, simple structure and convenient manufacturing, which can solve the problem of signal collecting and transmitting in hostile environment, and can also be applied in detecting low current flow and low voltage in electric power, bergol and various businesses.
Description
Technical field
The utility model relates to a kind of fiber-optic grating sensor, and it is little particularly to relate to a kind of volume, in light weight, simple in structure, easily manufactured little current low voltage fiber-optic grating sensor.
Background technology
Optical fiber and fiber-optic grating sensor are the novel sensors of high speed development in recent years, optical fiber and fiber-optic grating sensor can collect the sensing of information and be transmitted in one, compare it with traditional sensor and have a lot of advantages: as explosion-proof, anti-electromagnetic interference (EMI), anticorrosive, anti-vibration, high temperature resistant, volume is little, and is in light weight, flexible, can under rugged surroundings, use especially.
The lightning rod of power system transformer substation, the detection of oil field oil reservoir all needs to detect Weak current and low-voltage.The lightning rod of traditional power system transformer substation is an independent devices, and transformer station is incompatible for intelligent management.
Traditional oil field oil reservoir detection is the neutron source reflection wave by launching, and receives Weak current by photoelectric tube, is transferred to ground through repeatedly amplifying, because environment is abominable, and is very harsh to the requirement of electron device, the expense height, life-span is short, and signals collecting is difficulty very.
Existing at present a lot of patents about electric current and voltage sensor, but all be to measure electric current greater than 0.1A.What relate to as the patent of Chinese patent publication number CN1183561 is a kind of fibre optic current sensor, and it is suitable for electric system high-voltage great-current test and measuring and uses.The utility model patent of Chinese patent publication number CN2060892 relates to the optical fiber great current sensor, is applicable to 10
2～10
6The direct current of ampere, the measurement of interchange and pulse current.The patent of Chinese patent publication number CN2093400 also is a kind of novel optical fibre current sensor that is used to measure big electric current.The utility model patent of Chinese patent publication number CN2769888 discloses a kind of small electric current sensor, and the two-layer shielding construction that this patent adopted can guarantee the characteristics of sensor punching can overcome the interference of external magnetic field again.But the current value of its measurement is greater than 50mA.
The ubiquitous problem of known technology is that novel optical fiber class sensor can't carry out Weak current (0.02mA) and low-voltage (0.1V) detects.
Summary of the invention
Technical problem to be solved in the utility model is to overcome Fibre Optical Sensor to the insensitive problem of little current low voltage, and provide a kind of volume little, little current low voltage fiber-optic grating sensor in light weight, simple in structure, easily manufactured.
The technical scheme that the utility model adopted is: a kind of little current low voltage fiber-optic grating sensor, include light source, also be provided with photo-coupler, fiber grating, piezoelectric ceramics, demodulator of PM signal PM, wherein, light source joins by the input end of Transmission Fibers and photo-coupler, an output terminal of photo-coupler joins by Transmission Fibers and fiber grating one end that is set in parallel on the piezoelectric ceramics, another output terminal of photo-coupler joins by Transmission Fibers and demodulator of PM signal PM, the other end of fiber grating is the collection terminal of tested electric signals, and described piezoelectric ceramics connects the both positive and negative polarity of tested electric signals.
Described fiber grating is to be fixedly installed on the piezoelectric ceramics by the point on bonding its parallel surface of contact with piezoelectric ceramics.
Described piezoelectric ceramics is to be made of sheet metal and the piezoelectric ceramic piece that is coated on the sheet metal.
Described demodulator of PM signal PM is to be followed in series to form by linear filter, photodiode, electron-amplifier, computer control portion, and wherein the other end of linear filter connects the output terminal of photo-coupler by Transmission Fibers.
Described linear filter is a long period fiber grating.
Another technical scheme that the utility model adopted is: a kind of little current low voltage fiber-optic grating sensor, include light source, also be provided with photo-coupler, fiber grating, piezoelectric ceramics, demodulator of PM signal PM, out cylinder, wherein, described out cylinder is a top end opening, and the bottom is formed with the tubular construction of through hole, and the piezoelectric ceramics fixed cap is on the top end opening of out cylinder; Described light source joins by the input end of Transmission Fibers and photo-coupler, an output terminal of photo-coupler joins by an end of Transmission Fibers and fiber grating, another output terminal of photo-coupler joins by Transmission Fibers and demodulator of PM signal PM, the through hole that the other end of described fiber grating runs through the out cylinder bottom enters in the cylinder and is vertically set on the piezoelectric ceramics, and the collection terminal of formation tested electric signals, described piezoelectric ceramics connects the both positive and negative polarity of tested electric signals.
One end of described fiber grating is the through hole that is fixedly installed on the out cylinder lower end by bonding, and the other end of fiber grating is a little to be fixedly installed on the piezoelectric ceramics by bonding intersecting vertically with its piezoelectric ceramics.
Described piezoelectric ceramics is to be made of sheet metal and the piezoelectric ceramic piece that is coated on the sheet metal.
Described demodulator of PM signal PM is to be followed in series to form by linear filter, photodiode, electron-amplifier, computer control portion, and wherein the other end of linear filter connects the output terminal of photo-coupler by Transmission Fibers.
Described linear filter is a long period fiber grating.
Little current low voltage fiber-optic grating sensor of the present utility model, volume is little, and is in light weight, simple in structure, easily manufactured, can solve signals collecting and transmission problem under this rugged surroundings.And during the little electric current, low-voltage that can be widely used in electric power, oil and all trades and professions detect.
Description of drawings
Fig. 1 is the structural representation of the utility model first embodiment;
Fig. 2 is the structural representation of the utility model second embodiment;
Fig. 3 is the structural representation of piezoelectric ceramics in the utility model;
Fig. 4 is the structural representation of demodulator of PM signal PM in the utility model.
Wherein:
1: light source 2: Transmission Fibers
3: photo-coupler 4: fiber grating
5: piezoelectric ceramics 5a: piezoelectric ceramic piece
5b: sheet metal 6: tested electric signals
7: demodulator of PM signal PM 8: adhesive spots
9: adhesive spots 10: electrode
11: electrode 12: out cylinder
13: linear filter 14: photodiode
15: electron-amplifier 16: computer control portion
Embodiment
Provide specific embodiment below in conjunction with accompanying drawing, further specify little current low voltage fiber-optic grating sensor of the present utility model.
As shown in Figure 1, little current low voltage fiber-optic grating sensor of the present utility model, include light source 1, also be provided with photo-coupler 3, fiber grating 4, piezoelectric ceramics 5, demodulator of PM signal PM 7, wherein, light source 1 joins by the input end of Transmission Fibers 2 with photo-coupler 3 for wideband light source, an output terminal of photo-coupler 3 joins by Transmission Fibers 2 and fiber grating 4 one ends that are set in parallel on the piezoelectric ceramics 5, another output terminal of photo-coupler 3 joins by Transmission Fibers 2 and demodulator of PM signal PM 7, the other end of fiber grating 4 is the collection terminal of tested electric signals 6, and described piezoelectric ceramics 5 connects the both positive and negative polarity 10 of tested electric signals 6,11.Fiber grating 4 in this structure is to be fixedly installed on the piezoelectric ceramics 5 with point on the piezoelectric ceramics 5 parallel surface of contact by bonding its, and is provided with two adhesive spots, and two adhesive spots of bonding fiber-optic grating sensor 4 are all on piezoelectric ceramic piece 5.
Little current low voltage fiber-optic grating sensor of the present utility model, its fiber grating 4 can also adopt mutual vertically disposed mode with the set-up mode of piezoelectric ceramics 5.Concrete structure as shown in Figure 2, include light source 1, also be provided with photo-coupler 3, fiber grating 4, piezoelectric ceramics 5, demodulator of PM signal PM 7, out cylinder 12, wherein, described out cylinder 12 is a top end opening, and the bottom is formed with the tubular construction of through hole, and piezoelectric ceramics 5 fixed caps are on the top end opening of out cylinder 12; Described light source 1 joins by the input end of Transmission Fibers 2 with photo-coupler 3, an output terminal of photo-coupler 3 joins by the end of Transmission Fibers 2 with fiber grating 4, another output terminal of photo-coupler 3 joins by Transmission Fibers 2 and demodulator of PM signal PM 7, the through hole that the other end of described fiber grating 4 runs through out cylinder 12 bottoms enters in the cylinder 12 and is vertically set on the piezoelectric ceramics 5, and the collection terminal of formation tested electric signals 6, described piezoelectric ceramics 5 connects the both positive and negative polarity 10,11 of tested electric signals 6.One end of described fiber grating 4 is the through holes that are fixedly installed on out cylinder 12 lower ends by bonding, the other end of fiber grating 4 is a little to be fixedly installed on the piezoelectric ceramics 5 by bonding intersecting vertically with its piezoelectric ceramics 5, at this moment has only an adhesive spots that is connected with fiber grating 4 on the piezoelectric ceramics 5.
The adhering method of above-mentioned two kinds of structures can be used glue, and for example 353N also can use laser bonding.In order to guarantee the life-span of fiber-optic grating sensor 4, in fiber-optic grating sensor 4 surface applied layer of metal protection mould.
As shown in Figure 3, piezoelectric ceramics 5 of the present utility model is to be made of sheet metal 5b and the piezoelectric ceramic piece 5a that is coated on the sheet metal 5b, and sheet metal 5b wherein and piezoelectric ceramic piece 5a are connected the both positive and negative polarity 10,11 of tested electric signals 6 respectively.Described tested electric signals 6 is current source or voltage source.
As shown in Figure 4, demodulator of PM signal PM 7 of the present utility model is to be followed in series to form by linear filter 13, photodiode 14, electron-amplifier 15, computer control portion 16, and wherein the other end of linear filter 13 connects the output terminal of photo-coupler 3 by Transmission Fibers 2.The variation range of the necessary 2.5 times of fiber-optic grating sensors 4 in little current low voltage fiber-optic grating sensor of the range of linearity of linear filter 13.So linear filter 13 can be a long period fiber grating.
The above only is the preferred embodiment of the utility model patent, be not that this patent is done any pro forma restriction, every foundation technical spirit of the present invention is done any simple modification, equivalent variations and modification to above embodiment, all belongs in the scope of the utility model patented technology scheme.
Claims (10)
1. one kind little current low voltage fiber-optic grating sensor, include light source (1), it is characterized in that, also be provided with photo-coupler (3), fiber grating (4), piezoelectric ceramics (5), demodulator of PM signal PM (7), wherein, light source (1) joins by the input end of Transmission Fibers (2) with photo-coupler (3), an output terminal of photo-coupler (3) joins by Transmission Fibers (2) and fiber grating (4) one ends that are set in parallel on the piezoelectric ceramics (5), another output terminal of photo-coupler (3) joins by Transmission Fibers (2) and demodulator of PM signal PM (7), the other end of fiber grating (4) is the collection terminal of tested electric signals (6), and described piezoelectric ceramics (5) connects the both positive and negative polarity (10 of tested electric signals (6), 11).
2. little current low voltage fiber-optic grating sensor according to claim 1 is characterized in that, described fiber grating (4) is to be fixedly installed on the piezoelectric ceramics (5) with point on the parallel surface of contact of piezoelectric ceramics (5) by bonding its.
3. little current low voltage fiber-optic grating sensor according to claim 1 is characterized in that, described piezoelectric ceramics (5) is to be made of sheet metal (5b) and the piezoelectric ceramic piece (5a) that is coated on the sheet metal (5b).
4. little current low voltage fiber-optic grating sensor according to claim 1, it is characterized in that, described demodulator of PM signal PM (7) is to be followed in series to form by linear filter (13), photodiode (14), electron-amplifier (15), computer control portion (16), and wherein the other end of linear filter (13) connects the output terminal of photo-coupler (3) by Transmission Fibers (2).
5. little current low voltage fiber-optic grating sensor according to claim 4 is characterized in that described linear filter (13) is a long period fiber grating.
6. one kind little current low voltage fiber-optic grating sensor, include light source (1), it is characterized in that, also be provided with photo-coupler (3), fiber grating (4), piezoelectric ceramics (5), demodulator of PM signal PM (7), out cylinder (12), wherein, described out cylinder (12) is a top end opening, the bottom is formed with the tubular construction of through hole, and piezoelectric ceramics (5) fixed cap is on the top end opening of out cylinder (12); Described light source (1) joins by the input end of Transmission Fibers (2) with photo-coupler (3), an output terminal of photo-coupler (3) joins by the end of Transmission Fibers (2) with fiber grating (4), another output terminal of photo-coupler (3) joins by Transmission Fibers (2) and demodulator of PM signal PM (7), the through hole that the other end of described fiber grating (4) runs through out cylinder (12) bottom enters in the cylinder (12) and is vertically set on the piezoelectric ceramics (5), and the collection terminal of formation tested electric signals (6), described piezoelectric ceramics (5) connects the both positive and negative polarity (10 of tested electric signals (6), 11).
7. little current low voltage fiber-optic grating sensor according to claim 6, it is characterized in that, one end of described fiber grating (4) is the through hole that is fixedly installed on out cylinder (12) lower end by bonding, and the other end of fiber grating (4) is a little to be fixedly installed on the piezoelectric ceramics (5) by bonding intersecting vertically with its piezoelectric ceramics (5).
8. little current low voltage fiber-optic grating sensor according to claim 6 is characterized in that, described piezoelectric ceramics (5) is to be made of sheet metal (5b) and the piezoelectric ceramic piece (5a) that is coated on the sheet metal (5b).
9. little current low voltage fiber-optic grating sensor according to claim 6, it is characterized in that, described demodulator of PM signal PM (7) is to be followed in series to form by linear filter (13), photodiode (14), electron-amplifier (15), computer control portion (16), and wherein the other end of linear filter (13) connects the output terminal of photo-coupler (3) by Transmission Fibers (2).
10. little current low voltage fiber-optic grating sensor according to claim 6 is characterized in that described linear filter (13) is a long period fiber grating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200972615U CN201100865Y (en) | 2007-08-28 | 2007-08-28 | Small current low voltage optical grating sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200972615U CN201100865Y (en) | 2007-08-28 | 2007-08-28 | Small current low voltage optical grating sensor |
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| CN201100865Y true CN201100865Y (en) | 2008-08-13 |
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| CNU2007200972615U Expired - Fee Related CN201100865Y (en) | 2007-08-28 | 2007-08-28 | Small current low voltage optical grating sensor |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556861B (en) * | 2008-12-01 | 2011-09-28 | 魏孝铭 | Piezoelectric ceramic voltage dividing electronic potential transformer |
| CN102721853A (en) * | 2012-07-02 | 2012-10-10 | 昆明理工大学 | Optical fiber Bragg grating voltage sensor based on Rogowski coil |
| CN103116058A (en) * | 2013-01-17 | 2013-05-22 | 中国计量学院 | Current sensor based on polarization-maintaining long-cycle fiber Bragg grating (FBG) |
| CN103149413A (en) * | 2013-03-05 | 2013-06-12 | 昆明理工大学 | Piezoelectric actuation type optical fiber Bragg grating current sensor based on LPCT (low-power current transducer) and use method thereof |
| CN103176031A (en) * | 2013-03-04 | 2013-06-26 | 昆明理工大学 | Rogowski-coil-based piezoelectric drive fiber Bragg grating current sensor and application method thereof |
| WO2021120423A1 (en) * | 2019-12-17 | 2021-06-24 | 中国矿业大学 | Coal mine advanced detection method for header machine |
-
2007
- 2007-08-28 CN CNU2007200972615U patent/CN201100865Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101556861B (en) * | 2008-12-01 | 2011-09-28 | 魏孝铭 | Piezoelectric ceramic voltage dividing electronic potential transformer |
| CN102721853A (en) * | 2012-07-02 | 2012-10-10 | 昆明理工大学 | Optical fiber Bragg grating voltage sensor based on Rogowski coil |
| CN103116058A (en) * | 2013-01-17 | 2013-05-22 | 中国计量学院 | Current sensor based on polarization-maintaining long-cycle fiber Bragg grating (FBG) |
| CN103176031A (en) * | 2013-03-04 | 2013-06-26 | 昆明理工大学 | Rogowski-coil-based piezoelectric drive fiber Bragg grating current sensor and application method thereof |
| CN103149413A (en) * | 2013-03-05 | 2013-06-12 | 昆明理工大学 | Piezoelectric actuation type optical fiber Bragg grating current sensor based on LPCT (low-power current transducer) and use method thereof |
| WO2021120423A1 (en) * | 2019-12-17 | 2021-06-24 | 中国矿业大学 | Coal mine advanced detection method for header machine |
| US11099146B1 (en) | 2019-12-17 | 2021-08-24 | China University Of Mining And Technology | Coal mine advanced detection method for heading machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: NANJING DAYUAN INTELLIGENT TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: TIANJIN AT PHOTONICS INC. Effective date: 20120523 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 300192 NANKAI, TIANJIN TO: 211135 NANJING, JIANGSU PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20120523 Address after: Dong Qi Road Nanjing City, Jiangsu province 211135 kylin Technology Park No. 666 Patentee after: Nanjing Dayuan Intelligent Technology Co., Ltd. Address before: 300192 No. 16 West research road, Tianjin, Nankai District Patentee before: Tianjin AT Photonics Inc. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080813 Termination date: 20110828 |