CN102279008A - Optical fiber sensor based on diameter-gradient barrier - Google Patents
Optical fiber sensor based on diameter-gradient barrier Download PDFInfo
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- CN102279008A CN102279008A CN2010101989840A CN201010198984A CN102279008A CN 102279008 A CN102279008 A CN 102279008A CN 2010101989840 A CN2010101989840 A CN 2010101989840A CN 201010198984 A CN201010198984 A CN 201010198984A CN 102279008 A CN102279008 A CN 102279008A
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Abstract
The invention relates to an optical fiber sensor based on a diameter-gradient barrier. The optical fiber sensor comprises a rotary sensitive element for sensitive physical quantity, a light intensity detecting unit, a light emitting and receiving unit and a photoelectric conversion unit, wherein the light intensity detecting unit is used for converting a rotating angle of the rotary sensitive element into a corresponding light signal; the light emitting and receiving unit is used for supplying the light signal to the light intensity detecting unit, and receiving and outputting the light signal; and the photoelectric conversion unit is used for converting the light signal received by the light emitting and receiving unit into a corresponding electric signal. According to the invention, a discoid balance spring is used for driving a connecting central spindle connected with the discoid balance spring to rotate, the light intensity of light which is sheltered by the eccentric barrier can be detected by a detector, and the humidity value can be displayed in real time; and the optical fiber sensor has the advantages of relatively high stability and running reliability, is also suitable for electromagnetic, closed, inflammable and explosive environments and realizes remote transmission and monitoring.
Description
Technical field
The present invention relates to a kind of Fibre Optical Sensor, particularly a kind of formula Fibre Optical Sensor that blocks.
Background technology
Optical fiber sensing technology is to follow the development of optical communication technique the seventies in 20th century and a new technology developing rapidly, development through two more than ten years, become a proven technique field, and be used widely in industries such as industry, oil and electric power.Fibre Optical Sensor is to be the signal carrier with optical fiber, to the device that environment temperature, humidity, gas concentration etc. detect, has the characteristics of extra long distance, low-loss transmission.
Traditional sensors is divided into two kinds of electronic type and mechanical types.Electronic sensor has highly sensitive, and measuring accuracy advantages of higher, but its working environment has certain limitation is not suitable for electromagnetic environment, is in high humidity environment and can not long-distance transmissions for a long time; Mechanical sensor, lower to environmental requirement, but be not suitable for the place of closed environment or remote monitor, so certain limitation is being produced, also still existed when applying in the life to existing sensors.
Summary of the invention
In order to solve existing many defectives in the existing sensor technology, the invention provides a kind of good stability that has, reliable, be applicable to characteristics such as electromagnetism, airtight, inflammable and explosive environment and can realize the Fibre Optical Sensor based on Diameter Gradual Change formula shielding plate of long-distance transmissions and monitoring.
The technical scheme of technical solution problem of the present invention is:
A kind of Fibre Optical Sensor based on Diameter Gradual Change formula shielding plate, its special character is: comprise the rotary type sensitive element that is used for responsive physical quantity, with the rotational angle of rotary type sensitive element be converted to the corresponding light signal the light intensity probe unit, to the light intensity probe unit light signal is provided and receive its output light signal light emission receiving element, light is launched the photoelectric conversion unit that light signal that receiving element receives is converted to corresponding electric signal;
Described light intensity probe unit comprises with the coaxial Diameter Gradual Change formula shielding plate that is connected of the mandrel of rotary type sensitive element, is separately positioned on the completely reflecting mirror and the collimating apparatus of Diameter Gradual Change formula shielding plate both sides relative position, and described collimating apparatus links to each other by optical fiber and light emission receiving element;
Described collimating apparatus can be sent effective hot spot that diameter is A;
The diameter of described Diameter Gradual Change formula shielding plate evenly reduces along circumferencial direction in the rotational angle range of rotary type sensitive element, and the minimizing amplitude is A;
Described when the reference position of Fibre Optical Sensor the hot spot of the collimating apparatus sheet that is blocked just block fully.
Above-mentioned light intensity probe unit also comprises seal chamber, the mandrel of described rotary type sensitive element passes an end face of seal chamber, described rotary type sensitive element is arranged on the seal chamber outside, described Diameter Gradual Change formula shielding plate, completely reflecting mirror, collimating apparatus are arranged on the seal chamber inboard, and described optical fiber passes the other end of seal chamber.
Above-mentioned light emission receiving element comprises light source, isolator, optical branching device, detector, light source detection device; The output terminal of described light source connects the input end of isolator; The input end of described optical branching device links to each other with the output terminal of isolator and the input end of detector respectively; The output terminal of described optical branching device links to each other with light source light source detecting device and collimating apparatus respectively.
Above-mentioned rotary type sensitive element is the sensitive element based on the plate-like hairspring, and the outer end of described plate-like hairspring is fixed, and its inner end and mandrel are connected.
Above-mentioned plate-like hairspring outside is provided with protective sleeve; Described protective sleeve is fixed on the annular seal space.
The rotational angle range of above-mentioned rotary type sensitive element is 0～180 °.
Above-mentioned plate-like hairspring is the elasticity copper sheet that single face scribbles polyimide film.
The thickness of above-mentioned polyimide film is 0.1～0.2mm.
Advantage of the present invention:
Plate-like hairspring of the present invention comprises the substrate of elasticity copper sheet, and scribble polyimide film about 0.1～0.2mm in the one side, like this when humidity changes, the polyimide membrane volume that tightly is attached to copper sheet one side changes, make the plate-like copper sheet because the suffered stress difference in both sides and generation dish are tight or the deformation loosened, fixing outer copper sheet, the mandrel that is connected that the copper sheet of core position will drive with it links together rotates.Measure the light intensity of light after eccentric shielding plate blocks by detector, just can show real-time humidity value.
Relative stability of the present invention is high and reliable, also is applicable to electromagnetism, airtight, inflammable and explosive environment and realizes long-distance transmissions and monitoring simultaneously.
Description of drawings
Fig. 1 is the principle schematic of rotary type sensitive element of the present invention and light intensity probe unit;
Fig. 2 is the structure cut-open view of rotary type sensitive element of the present invention and light intensity probe unit;
Fig. 3 is the structural representation of hot spot shielding plate of the present invention;
Fig. 4 is the principle schematic of light emission receiving element of the present invention.
Among the figure: 1--rotary type sensitive element, 2--light intensity probe unit, 3--light emission receiving element, 4-mandrel; 5--gradual change type shielding plate, 6-completely reflecting mirror, 7-collimating apparatus; the 8-seal chamber, 9-hot spot, 10-plate-like hairspring; the 11-protective sleeve, 12-holder, 13-axle sleeve; the 14-light source, 15-isolator, 16-optical branching device; 17-light source detection device, 18-detector, 19-optical fiber.
Embodiment
Referring to Fig. 1 and Fig. 2, Fibre Optical Sensor involved in the present invention, comprise the rotary type sensitive element 1 that is used for responsive physical quantity, with the rotational angle of rotary type sensitive element 1 be converted to the corresponding light signal light intensity probe unit 2, light signal is provided and receives light emission receiving element 3 of its output light signal, energy be provided and the light signal that receives be converted to the photoelectric conversion unit of corresponding electric signal for light emission receiving element 3 to light intensity probe unit 2;
Light intensity probe unit 2 comprises with the mandrel 4 coaxial Diameter Gradual Change formula shielding plates 5 that are connected of rotary type sensitive element 1, is separately positioned on the completely reflecting mirror 6 and the collimating apparatus 7 of Diameter Gradual Change formula shielding plate 5 both sides relative positions, and described collimating apparatus 7 links to each other by optical fiber 19 and light emission receiving element 3; Collimating apparatus 7 can be sent effective hot spot 9 that diameter is A; The diameter of Diameter Gradual Change formula shielding plate 5 evenly reduces along circumferencial direction in the rotational angle range of rotary type sensitive element 1, and the minimizing amplitude is A; The hot spot 9 of the collimating apparatus sheet 5 that is blocked just blocks fully when the reference position of Fibre Optical Sensor.Mandrel 4 is arranged in the cavity 8 coaxial with cavity 8, and the center pit of an end by holder 12 extend to cavity 8 outsides, is coaxially arranged with rotary type sensitive element 1 on the end outside mandrel 4 extension cavitys 8.
When Fibre Optical Sensor during as humidity sensor, the light intensity probe portion also should comprise seal chamber 8, the mandrel 4 of rotary type sensitive element 1 passes an end of seal chamber 8, rotary type sensitive element 1 is arranged on seal chamber 8 outsides, Diameter Gradual Change formula shielding plate 5, completely reflecting mirror 6, collimating apparatus 7 are arranged on seal chamber 8 inboards, and optical fiber 19 passes the other end of seal chamber 8.Rotary type sensitive element 1 is the sensitive element based on plate-like hairspring 10 at this moment, and the outer end of plate-like hairspring 10 is fixed, and its inner end and mandrel 4 are connected.Plate-like hairspring 10 scribbles the elasticity copper sheet of polyimide film for single face.The thickness of polyimide film is 0.1～0.2mm.Plate-like hairspring 10 outsides are provided with protective sleeve 11; Protective sleeve 11 is fixed on the seal chamber 8.The rotational angle range of rotary type sensitive element 1 is 0～180 °.
Operated by rotary motion has holder 12 in the cavity 8, holder 12 is arranged on cavity 8 front ends and is provided with center pit between plate-like hairspring 10 and eccentric shielding plate 5 and in the center, the end that holder 12 is connected with cavity 8 extends in the cavity and the bending that takes the shape of the letter U, holder 12 adopts with cavity 8 and is tightly connected, guarantee that like this element in the cavity 8 is not subjected to ectocine, and the plate-like hairspring 10 outside cavity 8 can be worked better in test environment also.On the other end of mandrel 4, be vertically installed with eccentric shielding plate 5; The center of eccentric shielding plate 5 is arranged on the axle center of mandrel 4, isolates by holder 12 and plate-like hairspring 10; Like this, the eccentric shielding plate 5 of gradual change can be rotated together with plate-like hairspring 10.Preferably be provided with axle sleeve 13 in plate-like hairspring 10 outsides, these axle sleeve 13 coaxial external end heads that are arranged on holder 12; Like this, plate-like hairspring 10 is in the outside of holder 12, and eccentric shielding plate 5 is installed in holder 12 inboards, and the front end at cavity 8 also is provided with a protective sleeve 11 in axle sleeve 13 outsides in addition, and with cavity 8 coaxial settings, so just can play a protective role.The light microscopic 6 that is all-trans is set in parallel on the holder 12 with described eccentric shielding plate 5; Collimating apparatus 7 is coaxial and be parallel to mandrel 4 with the described light microscopic 6 of being all-trans, and is arranged on the U type wall of holder 12 and occupy the both sides of eccentric shielding plate 5 in 6 minutes with the light microscopic that is all-trans, and the light signal returns from collimating apparatus 7 more after reflection from collimating apparatus 7 outputs.
The principle of the invention: the formula of blocking light fibre humidity transducer involved in the present invention is because employing scribbles polyimide film humidity hairspring, the substrate of plate-like hairspring is the elasticity copper sheet, and scribble polyimide film about 0.1～0.2mm in the one side, like this when humidity changes, the polyimide membrane volume that tightly is attached to copper sheet one side changes, make the plate-like copper sheet because the suffered stress difference in both sides and generation dish are tight or the deformation loosened, fixing outer copper sheet, the mandrel that is connected that the copper sheet of core position will drive with it links together rotates, driving the eccentric shielding plate that is fixed on the mandrel simultaneously rotates together, eccentric design can make shielded area change in the rotation, referring to Fig. 3, the light of launching by collimating apparatus 7, the part of blocking without shielding plate 5 can come back to collimating apparatus 7 through the reflection of the light microscopic 6 that is all-trans, and the light that is blocked will lose, the back light flux is changed, different humidity, the corner difference of hairspring, drive the shielded area difference of eccentric shielding plate, make the light intensity difference of light after eccentric shielding plate blocks, thereby make detector measure the light intensity difference, just can show real-time humidity value.
When collimating apparatus 7 effective apertures are 1mm, drive mandrel 4 at plate-like hairspring 10 and rotate in 180 ° of scopes, it is as follows that hot spot 9 blocks radial dimension:
| Angle | Radial dimension | Difference |
| 0 | 0 | 0 |
| 30 | 0.071 | 0.071 |
| 60 | 0.252 | 0.181 |
| 90 | 0.5 | 0.248 |
| 120 | 0.753 | 0.253 |
| 150 | 0.939 | 0.186 |
| 180 | 1 | 0.061 |
Referring to Fig. 4, light emission receiving element 3 comprises light source 14, isolator 15, optical branching device 16, detector 18, light source detection device 17; The output terminal of light source 14 connects the input end of isolator 15; The input end of optical branching device 16 links to each other with the output terminal of isolator 15 and the input end of detector 18 respectively; The output terminal of optical branching device 16 links to each other with light source detection device 17 and collimating apparatus 7 respectively.In the transmission light path, to light source power supply, the light that light source 14 is sent enters collimating apparatus 7 through optical branching device 16 by circuit, wherein tells optical fiber access light source detection device 17 along separate routes, is used for monitoring in real time light source.The light that collimating apparatus 7 the penetrates part that sheet blocks that is not blocked reenters collimating apparatus 7 after completely reflecting mirror 6 reflections, enter detector 18 after optical branching device 16 shunt, detector 18 changes light signal into electric signal and change useful signal data output demonstration into after processing of circuit.
Claims (8)
1. Fibre Optical Sensor based on Diameter Gradual Change formula shielding plate is characterized in that: comprise the rotary type sensitive element that is used for responsive physical quantity, with the rotational angle of rotary type sensitive element be converted to the corresponding light signal the light intensity probe unit, to the light intensity probe unit light signal is provided and receive its output light signal light emission receiving element, light is launched the photoelectric conversion unit that light signal that receiving element receives is converted to corresponding electric signal;
Described light intensity probe unit comprises with the coaxial Diameter Gradual Change formula shielding plate that is connected of the mandrel of rotary type sensitive element, is separately positioned on the completely reflecting mirror and the collimating apparatus of Diameter Gradual Change formula shielding plate both sides relative position, and described collimating apparatus links to each other by optical fiber and light emission receiving element;
Described collimating apparatus can be sent the hot spot that diameter is A;
The diameter of described Diameter Gradual Change formula shielding plate evenly reduces along circumferencial direction in the rotational angle range of rotary type sensitive element, and the minimizing amplitude is A;
Described when the reference position of Fibre Optical Sensor the hot spot of the collimating apparatus sheet that is blocked just block fully.
2. the Fibre Optical Sensor based on Diameter Gradual Change formula shielding plate according to claim 1, it is characterized in that: described light intensity probe unit also comprises seal chamber, the mandrel of described rotary type sensitive element passes an end face of seal chamber, described rotary type sensitive element is arranged on the seal chamber outside, described Diameter Gradual Change formula shielding plate, completely reflecting mirror, collimating apparatus are arranged on the seal chamber inboard, and described optical fiber passes the other end of seal chamber.
3. the Fibre Optical Sensor based on Diameter Gradual Change formula shielding plate according to claim 1 and 2 is characterized in that: described light emission receiving element comprises light source, isolator, optical branching device, detector, light source detection device; The output terminal of described light source connects the input end of isolator; The input end of described optical branching device links to each other with the output terminal of isolator and the input end of detector respectively; The output terminal of described optical branching device links to each other with light source light source detecting device and collimating apparatus respectively.
4. the Fibre Optical Sensor based on Diameter Gradual Change formula shielding plate according to claim 3 is characterized in that: described rotary type sensitive element is the sensitive element based on the plate-like hairspring, and the outer end of described plate-like hairspring is fixed, and its inner end and mandrel are connected.
5. the Fibre Optical Sensor based on Diameter Gradual Change formula shielding plate according to claim 4 is characterized in that: described plate-like hairspring outside is provided with protective sleeve; Described protective sleeve is fixed on the annular seal space.
6. the Fibre Optical Sensor based on Diameter Gradual Change formula shielding plate according to claim 5 is characterized in that: the rotational angle range of described rotary type sensitive element is 0～180 °.
7. the Fibre Optical Sensor based on Diameter Gradual Change formula shielding plate according to claim 6 is characterized in that: described plate-like hairspring is the elasticity copper sheet that single face scribbles polyimide film.
8. the Fibre Optical Sensor based on Diameter Gradual Change formula shielding plate according to claim 7 is characterized in that: the thickness of described polyimide film is 0.1～0.2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101989840A CN102279008A (en) | 2010-06-12 | 2010-06-12 | Optical fiber sensor based on diameter-gradient barrier |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101989840A CN102279008A (en) | 2010-06-12 | 2010-06-12 | Optical fiber sensor based on diameter-gradient barrier |
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| CN102279008A true CN102279008A (en) | 2011-12-14 |
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| CN2010101989840A Pending CN102279008A (en) | 2010-06-12 | 2010-06-12 | Optical fiber sensor based on diameter-gradient barrier |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102682548A (en) * | 2012-05-25 | 2012-09-19 | 南京业祥科技发展有限公司 | Active detector capable of detecting connection and disconnection of optical fiber |
| CN110646170A (en) * | 2019-10-28 | 2020-01-03 | 苏州天准科技股份有限公司 | Electronic feedback manual zoom lens based on light intensity |
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| CN2242450Y (en) * | 1995-09-08 | 1996-12-11 | 清华大学 | Digital type optical fiber pressure sensor |
| CN2733383Y (en) * | 2004-09-08 | 2005-10-12 | 吴砺 | Improved structure of optical attenuator |
| JP2008064710A (en) * | 2006-09-11 | 2008-03-21 | Tokai Rika Co Ltd | Angle detector |
| CN201780115U (en) * | 2010-06-12 | 2011-03-30 | 飞秒光电科技(西安)有限公司 | Optical fiber sensor based on diameter gradual change type shield |
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2010
- 2010-06-12 CN CN2010101989840A patent/CN102279008A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60164213A (en) * | 1984-02-07 | 1985-08-27 | Victor Co Of Japan Ltd | Rotary encoder |
| CN2069551U (en) * | 1990-04-16 | 1991-01-16 | 北京手表元件厂 | Double dial mechanical deformation type thermohydrograph |
| CN1065142A (en) * | 1991-03-20 | 1992-10-07 | 中国科学院长春光学精密机械研究所 | A kind of optical electric axial angle encoder and method for extracting signal |
| CN2242450Y (en) * | 1995-09-08 | 1996-12-11 | 清华大学 | Digital type optical fiber pressure sensor |
| CN2733383Y (en) * | 2004-09-08 | 2005-10-12 | 吴砺 | Improved structure of optical attenuator |
| JP2008064710A (en) * | 2006-09-11 | 2008-03-21 | Tokai Rika Co Ltd | Angle detector |
| CN201780115U (en) * | 2010-06-12 | 2011-03-30 | 飞秒光电科技(西安)有限公司 | Optical fiber sensor based on diameter gradual change type shield |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102682548A (en) * | 2012-05-25 | 2012-09-19 | 南京业祥科技发展有限公司 | Active detector capable of detecting connection and disconnection of optical fiber |
| CN102682548B (en) * | 2012-05-25 | 2014-07-23 | 南京业祥科技发展有限公司 | Active detector capable of detecting connection and disconnection of optical fiber |
| CN110646170A (en) * | 2019-10-28 | 2020-01-03 | 苏州天准科技股份有限公司 | Electronic feedback manual zoom lens based on light intensity |
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Application publication date: 20111214 |