CN201622101U - Weighing sensor of Fiber bragg gratings - Google Patents
Weighing sensor of Fiber bragg gratings Download PDFInfo
- Publication number
- CN201622101U CN201622101U CN2009203510867U CN200920351086U CN201622101U CN 201622101 U CN201622101 U CN 201622101U CN 2009203510867 U CN2009203510867 U CN 2009203510867U CN 200920351086 U CN200920351086 U CN 200920351086U CN 201622101 U CN201622101 U CN 201622101U
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- China
- Prior art keywords
- bragg grating
- weighing sensor
- fiber bragg
- blind hole
- bragg gratings
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Abstract
The utility model discloses a weighing sensor of Fiber bragg gratings, belonging to sensors. The structure of the weighing sensor comprises an elastomer which is of a bridged double-shearing beam structure; the two sides of the elastomer are symmetrically provided with blind holes which are internally fixed with the Fiber bragg gratings and are sealed by sealing pieces; and leading-out wires of the Fiber bragg gratings are led-out from the end parts of the elastomer and are connected with an external signal demodulating system. Compared with the prior art, the weighing sensor has high accuracy, low cost, simple structure, suitability for installation, capabilities of working reliably for a long term under the severe conditions and the like, thus having good promotion and application values.
Description
Technical field
The utility model 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.
The utility model content
Technical assignment of the present utility model 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 scheme that its technical matters that solves the utility model adopts 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 utility model 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 utility model being done with reference to Figure of description 1.
Fiber Bragg grating weighing sensor of the present utility model, 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 |
|---|---|---|---|
| CN2009203510867U CN201622101U (en) | 2009-12-24 | 2009-12-24 | Weighing sensor of Fiber bragg gratings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203510867U CN201622101U (en) | 2009-12-24 | 2009-12-24 | Weighing sensor of Fiber bragg gratings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201622101U true CN201622101U (en) | 2010-11-03 |
Family
ID=43025558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203510867U Expired - Lifetime CN201622101U (en) | 2009-12-24 | 2009-12-24 | Weighing sensor of Fiber bragg gratings |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201622101U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200466A (en) * | 2011-01-26 | 2011-09-28 | 中南大学 | High-speed optical fiber grating weighing device and on-site calibration method |
-
2009
- 2009-12-24 CN CN2009203510867U patent/CN201622101U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102200466A (en) * | 2011-01-26 | 2011-09-28 | 中南大学 | High-speed optical fiber grating weighing device and on-site calibration method |
| CN102200466B (en) * | 2011-01-26 | 2012-07-18 | 中南大学 | High-speed optical fiber grating weighing device and on-site calibration method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 250002 Ji'nan, central city, Shandong hero hill road, No. 147 Patentee after: Shandong Jinzhong science and technology group Limited by Share Ltd Address before: 250002, Shandong, Ji'nan Province, 147 heroes mountain road, Ji'nan Jinzhong electronic weighing instrument Limited by Share Ltd Patentee before: Jinan Jinzhong Electronic Scale Co., Ltd. |
|
| CP03 | Change of name, title or address | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101103 |
|
| CX01 | Expiry of patent term |