CN205483248U - Optic fibre low frequency vibration sensor - Google Patents
Optic fibre low frequency vibration sensor Download PDFInfo
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- CN205483248U CN205483248U CN201521143690.2U CN201521143690U CN205483248U CN 205483248 U CN205483248 U CN 205483248U CN 201521143690 U CN201521143690 U CN 201521143690U CN 205483248 U CN205483248 U CN 205483248U
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- optical fiber
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Abstract
The utility model provides an optic fibre low frequency vibration sensor, it is main including incident optical fiber, emitting optical fiber, the optic fibre ring, the pole setting, the slip pendulum, the fiber connection pole, the shock attenuation piece, the optic fibre collet, damping vane and flank, the pole setting, the stopper, the shock attenuation piece, optic fibre collet and optic fibre support constitute fixed subassembly, emitting optical fiber, the optic fibre ring, slip pendulum and fiber connection pole constitution activity subassembly, incident optical fiber, emitting optical fiber, the fiber connector, an optical fiber coupler, incident optical fiber lead -out wire and emitting optical fiber lead -out wire constitute transmission device, damping vane and flank constitute damping machanism, sensor structure is simple, sensitivity is high, it is anti -interference strong, long transmission distance, the low -frequency response is good, the dynamic range is large, the sensor does not receive ambient temperature, humidity, the cleanliness influence, can not be because of moisture, the dust, mouldy class corrodes the normal use who influences the sensor, can some special occasion of fine adaptation rock like the high altitude chimney, bridge low frequency vibration, the monitoring of mountain landslide omen, long -time long -life low frequency vibration monitoring under the complex environment condition such as seismic precursor infrasound.
Description
Technical field
The present invention relates to a kind of vibrating sensor, particularly relate to a kind of optical fibre vibration sensor, belong to technical field of optical fiber sensing.
Background technology
Optical fibre vibration sensor is due to its long transmission distance, do not disturbed by electromagnetic environment, it is widely used, its modulation format mainly has intensity modulation type, grating type optical fiber and interference-type, existing more patented technology in terms of optical fibre vibration sensor at present, these Fibre Optical Sensors are respectively arranged with its advantage, some sensitivity is the highest, some frequency responses are fine, some technology contents are the highest, the signal conversion of common vibration can be adapted to very well, the common ground of these Fibre Optical Sensors is: mostly have fracture between (1) incident optical to outgoing optical fiber, optical signal can not continuously transmit, easily by ambient temperature, humidity and cleannes impact；(2) service life is limited, when fiber end face or grating gap by moisture, dust and mouldy etc. corrode time, the sensitivity of sensor and accuracy can be severely impacted, and have even can be malfunctioning；(3) many sensors do not have damping unit, the free vibration easy interferometry signal of pendulum, so, many optical fibre vibration sensors can not adapt to that some special occasions such as high-altitude chimney rocks, bridge low-frequency vibration, the monitoring of landslide omen, long-time long-life under the complicated environmental condition such as seismic precursor infrasonic wave monitor very well.
Summary of the invention
It is an object of the invention to provide a kind of simple in construction, can the long-time optical fiber low-frequency shock transducer used under complicated environmental condition.
nullThe technical problem to be solved is achieved through the following technical solutions: optical fiber low-frequency shock transducer includes incident optical 1、Outgoing optical fiber 2、Fiber optic loop 3、Vertical rod 4、Slip pendulum 5、First optical fiber connecting rod 6、Second optical fiber connecting rod 7、Limited block 8、Vibration damping sheet 9、Optical fiber collet 10、Structure of fiber_optic 11、Fiber connector 12、Fiber coupler 13、Incident optical lead-out wire 14、Sensor outer housing 15、Pick up the ears 16、Screw hole 17、Damping vane 18、Flank 19 and outgoing fiber pigtail 20，Vertical rod 4、Limited block 8、Vibration damping sheet 9、Optical fiber collet 10 and structure of fiber_optic 11 constitute fixation kit，Outgoing optical fiber 2、Fiber optic loop 3、Slip pendulum 5、First optical fiber connecting rod 6 and the second optical fiber connecting rod 7 constitute moving component，Incident optical 1、Outgoing optical fiber 2、Fiber connector 12、Fiber coupler 13、Incident optical lead-out wire 14 and outgoing fiber pigtail 20 constitute transmission mechanism，Damping vane 18 and flank 19 constitute damping mechanism；
nullIncident optical 1 it is provided with in sensor outer housing 15、Outgoing optical fiber 2、Fiber optic loop 3、Vertical rod 4、Slip pendulum 5、First optical fiber connecting rod 6、Second optical fiber connecting rod 7、Limited block 8、Vibration damping sheet 9、Optical fiber collet 10、Structure of fiber_optic 11、Damping vane 18 and flank 19，The center of the first optical fiber connecting rod 6 is provided with a slip pendulum 5，A centrally disposed circular hole of slip pendulum 5，The both sides of the first optical fiber connecting rod 6 are provided with damping vane 18，The both sides of each damping vane 18 arrange a flank 19，Flank 19 and damping vane 18 constitute a flat H type，Optical fiber collet 10 is provided with incident optical 1 and fiber optic loop 3，Fiber optic loop 3 is made up of five elliptical rings，The center of optical fiber collet 10 is provided with a vertical rod 4，One limited block 8 is set in vertical rod 4、Two vibration damping sheets 9，Two vibration damping sheets 9 lay respectively at the both sides up and down of slip pendulum 5，The vibration damping sheet 9 of top is fixed on sensor outer housing 15，The vibration damping sheet 9 of lower section is fixed on the top of limited block 8，Vertical rod 4 is through the center hole of slip pendulum 5，Slip pendulum 5 can be along the axis direction up-down vibration of vertical rod 4 in vertical rod 4，The side of the first optical fiber connecting rod 6 is provided with five apertures，The five optical fibers at fiber optic loop 3 top is each passed through described aperture，The five optical fibers at fiber optic loop 3 top is interconnected by the first optical fiber connecting rod 6，The waist of fiber optic loop 3 the right and left is respectively provided with a second optical fiber connecting rod 7，In the second optical fiber connecting rod 7 on the left side, five apertures are set，In the second optical fiber connecting rod 7 on the right, four apertures are set，The optical fiber of fiber optic loop 3 waist is each passed through described aperture，The optical fiber of fiber optic loop 3 waist is interconnected by the second optical fiber connecting rod 7，The outgoing optical fiber 2 drawn in first optical fiber connecting rod 6 is not passed through the second optical fiber connecting rod 7 on the right，Outgoing optical fiber 2 is connected to fiber connector 12 after structure of fiber_optic 11；
nullIncident optical lead-out wire 14 it is followed successively by main optical path direction of advance、Fiber connector 12、Fiber coupler 13、Fiber connector 12、Incident optical 1、Fiber optic loop 3、Outgoing optical fiber 2、Fiber connector 12、Fiber coupler 13、Fiber connector 12、Outgoing fiber pigtail 20，The core component of optical fiber low-frequency shock transducer is fiber optic loop 3，When extraneous vibration experienced by sensor，Sensor fixing assembly entirety is vibrated therewith，Effect of inertia due to slip pendulum 5，Slip pendulum 5 relative to sensor outer housing 15 along the axis direction up-down vibration of vertical rod 4，The vibration of slip pendulum 5 transmission by the first optical fiber connecting rod 6，Fiber optic loop 3 entirety is widened or is crushed，Ten waist knee of five elliptical rings deform upon simultaneously，Exterior laser source enters from incident optical 1，Go out to outgoing optical fiber 2，Ten waist knee through fiber optic loop 3，Overall light attenuation superposition increase or superposition at fiber optic loop 3 waist reduce.
Owing to using technique scheme, advantage for present invention and good effect be: sensor construction is simple, highly sensitive, output amplitude is big, anti-interference strong, long transmission distance, LF-response are good, lower frequency limit is low, vibrating diaphragm dynamic range is big, damping good, it is possible to the long-time long-life low-frequency vibration signal monitoring under the complicated environmental conditions such as fine adaptation some special occasions such as high-altitude chimney rocks, bridge low-frequency vibration, the monitoring of landslide omen, seismic precursor infrasonic wave.
Accompanying drawing explanation
The present invention is further described with embodiment below in conjunction with the accompanying drawings, and the present invention has following 3 width accompanying drawings:
Fig. 1 is optical fiber low-frequency shock transducer structure chart of the present invention,
Fig. 2 is optical fiber low-frequency shock transducer optical fiber layout of the present invention,
Fig. 3 is fiber optic loop and optical fiber connecting rod structure chart in optical fiber low-frequency shock transducer of the present invention.
Marked each numeral is expressed as follows respectively:
1. incident optical, 2. outgoing optical fiber, 3. fiber optic loop, 4. vertical rod, 5. slip pendulum, 6. the first optical fiber connecting rod, 7. the second optical fiber connecting rod, 8. limited block, 9. vibration damping sheet, 10. optical fiber collet, 11. structure of fiber_optic, 12. fiber connectors, 13. fiber couplers, 14. incident optical lead-out wires, 15. sensor outer housings, 16. pick up the ears, 17. screw holes, 18. damping vanes, 19. flanks, 20. outgoing fiber pigtails.
Detailed description of the invention
null1. according to Fig. 1 and Fig. 2，Optical fiber low-frequency shock transducer includes incident optical 1、Outgoing optical fiber 2、Fiber optic loop 3、Vertical rod 4、Slip pendulum 5、First optical fiber connecting rod 6、Second optical fiber connecting rod 7、Limited block 8、Vibration damping sheet 9、Optical fiber collet 10、Structure of fiber_optic 11、Fiber connector 12、Fiber coupler 13、Incident optical lead-out wire 14、Sensor outer housing 15、Pick up the ears 16、Screw hole 17、Damping vane 18、Flank 19 and outgoing fiber pigtail 20，Vertical rod 4、Limited block 8、Vibration damping sheet 9、Optical fiber collet 10 and structure of fiber_optic 11 constitute fixation kit，Outgoing optical fiber 2、Fiber optic loop 3、Slip pendulum 5、First optical fiber connecting rod 6 and the second optical fiber connecting rod 7 constitute moving component，Incident optical 1、Outgoing optical fiber 2、Fiber connector 12、Fiber coupler 13、Incident optical lead-out wire 14 and outgoing fiber pigtail 20 constitute transmission mechanism，Damping vane 18 and flank 19 constitute damping mechanism.
null2. it is provided with incident optical 1 in sensor outer housing 15、Outgoing optical fiber 2、Fiber optic loop 3、Vertical rod 4、Slip pendulum 5、First optical fiber connecting rod 6、Second optical fiber connecting rod 7、Limited block 8、Vibration damping sheet 9、Optical fiber collet 10、Structure of fiber_optic 11、Damping vane 18 and flank 19，The center of the first optical fiber connecting rod 6 is provided with a slip pendulum 5，A centrally disposed circular hole of slip pendulum 5，The both sides of the first optical fiber connecting rod 6 are provided with damping vane 18，The both sides of each damping vane 18 arrange a flank 19，Flank 19 and damping vane 18 constitute a flat H type，Optical fiber collet 10 is provided with incident optical 1 and fiber optic loop 3，Fiber optic loop 3 is made up of five elliptical rings，The center of optical fiber collet 10 is provided with a vertical rod 4，One limited block 8 is set in vertical rod 4、Two vibration damping sheets 9，Two vibration damping sheets 9 lay respectively at the both sides up and down of slip pendulum 5，The vibration damping sheet 9 of top is fixed on sensor outer housing 15，The vibration damping sheet 9 of lower section is fixed on the top of limited block 8，Vertical rod 4 is through the center hole of slip pendulum 5，Slip pendulum 5 can be along the axis direction up-down vibration of vertical rod 4 in vertical rod 4，The side of the first optical fiber connecting rod 6 is provided with five apertures，The five optical fibers at fiber optic loop 3 top is each passed through described aperture，The five optical fibers at fiber optic loop 3 top is interconnected by the first optical fiber connecting rod 6，The waist of fiber optic loop 3 the right and left is respectively provided with a second optical fiber connecting rod 7，In the second optical fiber connecting rod 7 on the left side, five apertures are set，In the second optical fiber connecting rod 7 on the right, four apertures are set，The optical fiber of fiber optic loop 3 waist is each passed through described aperture，The optical fiber of fiber optic loop 3 waist is interconnected by the second optical fiber connecting rod 7，The outgoing optical fiber 2 drawn in first optical fiber connecting rod 6 is not passed through the second optical fiber connecting rod 7 on the right，Outgoing optical fiber 2 is connected to fiber connector 12 after structure of fiber_optic 11.
null3. it is followed successively by incident optical lead-out wire 14 in main optical path direction of advance、Fiber connector 12、Fiber coupler 13、Fiber connector 12、Incident optical 1、Fiber optic loop 3、Outgoing optical fiber 2、Fiber connector 12、Fiber coupler 13、Fiber connector 12、Outgoing fiber pigtail 20，The core component of optical fiber low-frequency shock transducer is fiber optic loop 3，When extraneous vibration experienced by sensor，Sensor fixing assembly entirety is vibrated therewith，Effect of inertia due to slip pendulum 5，Slip pendulum 5 relative to sensor outer housing 15 along the axis direction up-down vibration of vertical rod 4，The vibration of slip pendulum 5 transmission by the first optical fiber connecting rod 6，Fiber optic loop 3 entirety is widened or is crushed，Ten waist knee of five elliptical rings deform upon simultaneously，Exterior laser source enters from incident optical 1，Go out to outgoing optical fiber 2，Ten waist knee through fiber optic loop 3，Overall light attenuation superposition increase or superposition at fiber optic loop 3 waist reduce，So it is highly sensitive，Output amplitude is big.
null4. the optical fiber used by sensor is 50 μm/125 μm multimode fibres，The a length of 40mm of fiber optic loop 3 transverse，Short axial length is 20mm，Optical fiber does not has mark of break from incident optical 1 between fiber optic loop 3 to outgoing optical fiber 2，So sensor is not by ambient temperature、Humidity、Cleannes affect，Will not be because of moisture、Dust、Mouldy etc. erosion and affect the normal use of sensor，First optical fiber connecting rod 6 and the second optical fiber connecting rod 7 are light-weight foam plastics，Diameter is respectively 1mm and 3mm，Damping vane 18 and flank 19 are lightweight aluminium，Slip pendulum 5 is brass material，Quality is 20g，Vertical rod 4 is steel material，Surface requirements mirror finish，Make the slip pendulum 5 can be almost without Frictional Slipping on vertical rod 4，The frequency of vibration of sensor and slip pendulum 5、First optical fiber connecting rod 6、Second optical fiber connecting rod 7、Damping vane 18 is relevant with the elasticity of the quality of flank 19 and optical fiber，After optical fiber elasticity determines，Frequency of vibration is mainly determined by the quality of slip pendulum 5，The frequency response range of this sensor is 0.1Hz～1000Hz，The effect of damping vane 18 and flank 19 is: when extraneous vibration stops，Can prevent slip pendulum 5 Long-term Free from vibrating，Damping vane 18 and flank 19 make slip pendulum 5 stop rapidly by air drag，To alleviate slip pendulum 5 free vibration impact on measuring signal.
Claims (2)
- null1. an optical fiber low-frequency shock transducer，Including incident optical (1)、Outgoing optical fiber (2)、Fiber optic loop (3)、Vertical rod (4)、Slip pendulum (5)、First optical fiber connecting rod (6)、Second optical fiber connecting rod (7)、Limited block (8)、Vibration damping sheet (9)、Optical fiber collet (10)、Structure of fiber_optic (11)、Fiber connector (12)、Fiber coupler (13)、Incident optical lead-out wire (14)、Sensor outer housing (15)、Pick up the ears (16)、Screw hole (17)、Damping vane (18)、Flank (19) and outgoing fiber pigtail (20)，Vertical rod (4)、Limited block (8)、Vibration damping sheet (9)、Optical fiber collet (10) and structure of fiber_optic (11) constitute fixation kit，Outgoing optical fiber (2)、Fiber optic loop (3)、Slip pendulum (5)、First optical fiber connecting rod (6) and the second optical fiber connecting rod (7) constitute moving component，Incident optical (1)、Outgoing optical fiber (2)、Fiber connector (12)、Fiber coupler (13)、Incident optical lead-out wire (14) and outgoing fiber pigtail (20) constitute transmission mechanism，Damping vane (18) and flank (19) constitute damping mechanism；nullIt is characterized in that: in sensor outer housing (15), be provided with incident optical (1)、Outgoing optical fiber (2)、Fiber optic loop (3)、Vertical rod (4)、Slip pendulum (5)、First optical fiber connecting rod (6)、Second optical fiber connecting rod (7)、Limited block (8)、Vibration damping sheet (9)、Optical fiber collet (10)、Structure of fiber_optic (11)、Damping vane (18) and flank (19)，The center of the first optical fiber connecting rod (6) is provided with a slip pendulum (5)，A centrally disposed circular hole of slip pendulum (5)，The both sides of the first optical fiber connecting rod (6) are provided with damping vane (18)，The both sides of each damping vane (18) arrange a flank (19)，Flank (19) constitutes a flat H type with damping vane (18)，Optical fiber collet (10) is provided with incident optical (1) and fiber optic loop (3)，Fiber optic loop (3) is made up of five elliptical rings，The center of optical fiber collet (10) is provided with a vertical rod (4)，One limited block (8) is set in vertical rod (4)、Two vibration damping sheets (9)，Two vibration damping sheets (9) lay respectively at the both sides up and down of slip pendulum (5)，The vibration damping sheet (9) of top is fixed on sensor outer housing (15)，The vibration damping sheet (9) of lower section is fixed on the top of limited block (8)，Vertical rod (4) is through the center hole of slip pendulum (5)，Slip pendulum (5) can be along the axis direction up-down vibration of vertical rod (4) in vertical rod (4)，The side of the first optical fiber connecting rod (6) is provided with five apertures，The five optical fibers at fiber optic loop (3) top is each passed through described aperture，The five optical fibers at fiber optic loop (3) top is interconnected by the first optical fiber connecting rod (6)，The waist of fiber optic loop (3) the right and left is respectively provided with a second optical fiber connecting rod (7)，In the second optical fiber connecting rod (7) on the left side, five apertures are set，In the second optical fiber connecting rod (7) on the right, four apertures are set，The optical fiber of fiber optic loop (3) waist is each passed through described aperture，The optical fiber of fiber optic loop (3) waist is interconnected by the second optical fiber connecting rod (7)，The upper outgoing optical fiber (2) drawn of first optical fiber connecting rod (6) is not passed through the second optical fiber connecting rod (7) on the right，Outgoing optical fiber (2) is connected to fiber connector (12) after structure of fiber_optic (11).
- nullOptical fiber low-frequency shock transducer the most according to claim 1，It is characterized in that: in main optical path direction of advance, be followed successively by incident optical lead-out wire (14)、Fiber connector (12)、Fiber coupler (13)、Fiber connector (12)、Incident optical (1)、Fiber optic loop (3)、Outgoing optical fiber (2)、Fiber connector (12)、Fiber coupler (13)、Fiber connector (12)、Outgoing fiber pigtail (20)，The core component of optical fiber low-frequency shock transducer is fiber optic loop (3)，Optical fiber used by described sensor is 50 μm/125 μm multimode fibres，First optical fiber connecting rod (6)、Second optical fiber connecting rod (7)、Damping vane (18) and flank (19) are aluminum material，Slip pendulum (5) is brass material，Vertical rod (4) is steel material，Frequency of vibration is mainly determined by the quality of slip pendulum (5)，The frequency response range of described sensor is 0.1Hz～1000Hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521143690.2U CN205483248U (en) | 2015-12-28 | 2015-12-28 | Optic fibre low frequency vibration sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521143690.2U CN205483248U (en) | 2015-12-28 | 2015-12-28 | Optic fibre low frequency vibration sensor |
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| CN205483248U true CN205483248U (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201521143690.2U Withdrawn - After Issue CN205483248U (en) | 2015-12-28 | 2015-12-28 | Optic fibre low frequency vibration sensor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486398A (en) * | 2015-12-28 | 2016-04-13 | 盐城师范学院 | Fiber low-frequency vibration sensor |
| CN108548566A (en) * | 2018-06-22 | 2018-09-18 | 上海达琪智能科技有限公司 | Optical fiber point type temperature disturbance sensing device and system |
| CN110285878A (en) * | 2019-07-08 | 2019-09-27 | 江子秦 | A kind of the distributed optical fiber vibration sensing device and implementation method of high frequency sound |
-
2015
- 2015-12-28 CN CN201521143690.2U patent/CN205483248U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486398A (en) * | 2015-12-28 | 2016-04-13 | 盐城师范学院 | Fiber low-frequency vibration sensor |
| CN105486398B (en) * | 2015-12-28 | 2018-09-07 | 盐城师范学院 | Optical fiber low-frequency shock transducer |
| CN108548566A (en) * | 2018-06-22 | 2018-09-18 | 上海达琪智能科技有限公司 | Optical fiber point type temperature disturbance sensing device and system |
| CN110285878A (en) * | 2019-07-08 | 2019-09-27 | 江子秦 | A kind of the distributed optical fiber vibration sensing device and implementation method of high frequency sound |
| CN110285878B (en) * | 2019-07-08 | 2021-04-30 | 江子秦 | High-frequency-response distributed optical fiber vibration sensing device and implementation method |
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| C14 | Grant of patent or utility model | ||
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| AV01 | Patent right actively abandoned |
Granted publication date: 20160817 Effective date of abandoning: 20180907 |
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| AV01 | Patent right actively abandoned |