CN101762308A - Fiber Bragg grating weighing sensor - Google Patents
Fiber Bragg grating weighing sensor Download PDFInfo
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- CN101762308A CN101762308A CN200910252594A CN200910252594A CN101762308A CN 101762308 A CN101762308 A CN 101762308A CN 200910252594 A CN200910252594 A CN 200910252594A CN 200910252594 A CN200910252594 A CN 200910252594A CN 101762308 A CN101762308 A CN 101762308A
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- bragg grating
- fiber bragg
- weighing sensor
- elastic body
- blind hole
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Abstract
The invention discloses a fiber Bragg grating weighing sensor belonging to the field of sensors, which structurally comprises an elastic body. The elastic body is in a bridge type double-shear beam structure; both sides of the elastic body are symmetrically provided with blind holes; fiber Bragg gratings are fixed in blind holes which are sealed by sealing members; and lead wires of the fiber Bragg gratings are led from the end part of the elastic body and are connected with an external signal demodulating system. Compared with the prior art, the fiber Bragg grating weighing sensor has high precision, low cost, simple structure and suitable installation, can reliably work for a long time under a severe environment, and the like, thereby having very good popularization and application value.
Description
Technical field
The present invention relates to a kind of sensor, especially a kind of fiber Bragg grating weighing sensor.
Background technology
LOAD CELLS is to have considered to make after the acceleration of gravity and aerostatic buoyancy influence of land used, measures the force transducer of quality by measured (quality) being converted to another kind of measured (output).Present existing LOAD CELLS mainly is a resistance-strain type, also has piezoelectric type, condenser type, inductance type etc.Particularly resistance strain weighing transducer has precision height, manufacture craft maturation, low cost and other advantages, has obtained widespread use at the weighing apparatus metering field; Because the LOAD CELLS major part is at outside work, be subject to the influence of environment, for example: electromagnetic interference (EMI), humidity, high temperature, can not long-distance transmissions, incompatibility hazardous area etc.Therefore, under rugged surroundings, existing LOAD CELLS also has its limitation.
Optical fiber technology is the novel sensing technology that grew up in recent years, has obtained widespread use in electronic communication field.Fiber grating strain meter and the sensor of measuring temperature and strain have also been arranged now, adopted the wavelength measurement technology, had certain measuring accuracy and high reliability.But owing to the restriction of sensor construction, precision etc., present fiber-optic grating sensor can't satisfy the needs in Weighing field.At present, good solution is not also arranged.
Summary of the invention
Technical assignment of the present invention is to provide a kind of fiber Bragg grating weighing sensor at above-mentioned deficiency of the prior art, this fiber Bragg grating weighing sensor has the precision height, and cost is low, and is simple in structure, suitable installation, the characteristics that can under rugged surroundings, work reliably and with long-term.
The technical solution adopted for the present invention to solve the technical problems is: it comprises elastic body, described elastic body is a bridge-type double-shear girder construction, described elastomeric symmetria bilateralis is provided with blind hole, the blind hole internal fixation has bragg grating, described blind hole seals by seal, the extension line of bragg grating is drawn from elastomeric end, and is connected with the external signal demodulating system.
Described seal is coating adhesive or diaphragm.
Described bragg grating 45 degree that tilt in blind hole are provided with.
Described bragg grating is horizontally disposed with in blind hole.
Described bragg grating is 4, is evenly distributed in the blind hole of elastic body both sides.
Fiber Bragg grating weighing sensor of the present invention is compared with prior art, has following outstanding beneficial effect: the precision height, cost is low, simple in structure, the suitable installation, can under rugged surroundings, work reliably and with long-term, not be subjected to the influence of environment, characteristics such as still can work in electromagnetic interference (EMI), humidity, high temperature, long-distance transmissions and hazardous area.
Description of drawings
Accompanying drawing 1 is the structural representation of fiber Bragg grating weighing sensor;
Accompanying drawing 2 is fiber Bragg grating weighing sensor fundamental diagrams;
Accompanying drawing 3 is front views of the fiber Bragg grating weighing sensor of bragg grating 45 degree settings;
Accompanying drawing 6 is front views of the horizontally disposed fiber Bragg grating weighing sensor of bragg grating;
Accompanying drawing 7 is rear views shown in Figure 6;
Description of reference numerals: 1, bragg grating, 2, coating adhesive, 3, elastic body, 4, blind hole, 5, diaphragm, 6, extension line, 7, the external signal demodulating system, 8, perforation.
Embodiment
Explain below shown in the accompanying drawing 8 fiber Bragg grating weighing sensor of the present invention being done with reference to Figure of description 1.
Fiber Bragg grating weighing sensor of the present invention, its structure comprises elastic body 3, described elastic body 3 is a bridge-type double-shear girder construction, the symmetria bilateralis of described elastic body 3 is provided with blind hole 4, blind hole 4 internal fixation have bragg grating 1, and described blind hole 4 is provided with perforation 8 by the seal sealing in the described elastic body 3, the extension line 6 of bragg grating 1 is drawn from the end perforation 8 of elastic body 3, and is connected with external signal demodulating system 7.
Described seal is coating adhesive 2 or diaphragm 5.
Described bragg grating 1 45 degree that tilt in blind hole 4 are provided with.
Described bragg grating 1 is horizontally disposed with in blind hole 4.
Described bragg grating 1 is 4, is evenly distributed in the blind hole 4 of elastic body 3 both sides.
Bragg grating 1 is fixed in the blind hole 4, and its fixed form can adopt the mode of pasting or welding.Bragg grating extension line 6 is drawn with external signal demodulating system 7 from the end of elastic body 3 and is connected, fixedly the strain of the bragg grating band of position is basic evenly distributes, when load acts on elastic body 3 double-shear girder constructions, elastic body 3 produces distortion, the bragg grating 1 that is fixed in the blind hole 4 is experienced distortion, drift takes place or changes in the fiber grating reflection wavelength, by outer signals demodulating system 7 its bragg grating 1 reflection wavelength is modulated and to be obtained heat transfer agent, thereby load weight can be converted to bragg grating 1 wavelength parameter, measurement bragg grating reflection wavelength can be realized the measurement to load.
Except that the described technical characterictic of instructions, be the known technology of those skilled in the art.
Claims (5)
1. fiber Bragg grating weighing sensor, comprise elastic body, it is characterized in that: described elastic body is a bridge-type double-shear girder construction, described elastomeric symmetria bilateralis is provided with blind hole, the blind hole internal fixation has bragg grating, described blind hole seals by seal, and the extension line of bragg grating is drawn from elastomeric end, and is connected with the external signal demodulating system.
2. fiber Bragg grating weighing sensor according to claim 1 is characterized in that: described seal is coating adhesive or diaphragm.
3. fiber Bragg grating weighing sensor according to claim 1 is characterized in that: described bragg grating 45 degree that tilt in blind hole are provided with.
4. fiber Bragg grating weighing sensor according to claim 1 is characterized in that: described bragg grating is horizontally disposed with in blind hole.
5. fiber Bragg grating weighing sensor according to claim 1 is characterized in that: described bragg grating is 4, is evenly distributed in the blind hole of elastic body both sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910252594A CN101762308A (en) | 2009-12-24 | 2009-12-24 | Fiber Bragg grating weighing sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910252594A CN101762308A (en) | 2009-12-24 | 2009-12-24 | Fiber Bragg grating weighing sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101762308A true CN101762308A (en) | 2010-06-30 |
Family
ID=42493606
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910252594A Pending CN101762308A (en) | 2009-12-24 | 2009-12-24 | Fiber Bragg grating weighing sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101762308A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344311A (en) * | 2013-06-24 | 2013-10-09 | 华北电力大学 | Overload protection type optical fiber Bragg grating weighing sensor and icing monitoring system |
| CN105023376A (en) * | 2015-08-17 | 2015-11-04 | 中国电子科技集团公司第八研究所 | Fiber-grating cultural relic weighing type antitheft alarm sensor |
| CN109025971A (en) * | 2018-04-28 | 2018-12-18 | 中国石油天然气股份有限公司 | Drilling pressure detection device and diaphragm stress mechanism thereof |
-
2009
- 2009-12-24 CN CN200910252594A patent/CN101762308A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103344311A (en) * | 2013-06-24 | 2013-10-09 | 华北电力大学 | Overload protection type optical fiber Bragg grating weighing sensor and icing monitoring system |
| CN105023376A (en) * | 2015-08-17 | 2015-11-04 | 中国电子科技集团公司第八研究所 | Fiber-grating cultural relic weighing type antitheft alarm sensor |
| CN109025971A (en) * | 2018-04-28 | 2018-12-18 | 中国石油天然气股份有限公司 | Drilling pressure detection device and diaphragm stress mechanism thereof |
| CN109025971B (en) * | 2018-04-28 | 2022-02-01 | 中国石油天然气股份有限公司 | Drilling pressure detection device and diaphragm stress mechanism thereof |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100630 |