CN105023376A - Fiber-grating cultural relic weighing type antitheft alarm sensor - Google Patents
Fiber-grating cultural relic weighing type antitheft alarm sensor Download PDFInfo
- Publication number
- CN105023376A CN105023376A CN201510505354.6A CN201510505354A CN105023376A CN 105023376 A CN105023376 A CN 105023376A CN 201510505354 A CN201510505354 A CN 201510505354A CN 105023376 A CN105023376 A CN 105023376A
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- base plate
- fiber
- fiber grating
- sensing
- grating
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/125—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing wherein the weighing element is an optical member
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The invention relates to a fiber-grating cultural relic weighing type antitheft alarm sensor comprising four pressing blocks, four cylindrical cushion blocks, two LC fiber flange interfaces, a base plate connected with a housing body, and four sensing cantilever beams pasted with fiber gratings. Free ends of the four sensing cantilever beams are respectively distributed at four corners of the base plate and are respectively connected with the four cylindrical cushion block; and fixed ends of the four sensing cantilever beams are located at the edge of the center of the base plate and are connected with the four pressing blocks arranged above the fixed ends and the base plate. Four through holes where the four cylindrical cushion blocks can slide up and down in the holes are formed in the base plate. The fiber gratings of the four sensing cantilever beams are successively connected in series; and the two ends of the series fiber grating unit are respectively connected with the two LC fiber flange interfaces. According to the invention, weighing, displaying, and on-line monitoring and antitheft alarming of important cultural relics can be realized; and the sensor has characteristics of high intrinsic safety, good anti-electromagnetic interference property, large-scale networking, low cost, high measurement precision, large range, small size, and easy assembling.
Description
Technical field:
The present invention relates to sensor technical field, specifically a kind ofly not only can realize the weighing of important historical relic, show and on-line monitoring burglar alarm, but also there is essential safety, electromagnetism interference, can large-scale network-estabilishing be realized, cost is low, measuring accuracy is high, range is large, volume is little, be easy to the fiber grating historical relic Weighing type burglar alarm sensor of the features such as assembling.
Background technology:
Historical relic is the material remnants of the national history of witness one, achievement and culture life, contains and embodies the humanistic quality that the Chinese nation condenses in formation and development process.All historical relics all have non-renewable, and the self-value that its singularity leaving over quantity determines showpiece is limitless, so protection historical relic has numerous high meaning.Because historical relic has high value, cause its high economic worth.Therefore it also becomes the flash gentry using the primary goal of seizing jewellery and committing theft as them.Historical relic is stolen, mostly there is leak with safeguard measure relevant, and the security protection demand in museum is different from other field, how for the real needs of historical relic security protection, works out effective security alarm system just one of key becoming historical relic's protection.Meanwhile, also there is environmental element danger in cultural relic conservation, is primarily fire prevention, particularly ancient architecture, major part is wooden structures, and fire load is large, fire resistance rating is low, and firebreak is little, and its fire characteristics aggregate performance is easy breaking out of fire, easily causes and spread, easily cause heavy losses and impact.Especially many at some ancient architectures of China, the ground that historical relic collects, must consider the possibility of this harm, prevent in advance, and reduces possibility burning things which may cause a fire disaster technically.
At present, at home and abroad preservation of cultural relics technology of new generation generally adopts electric sensor product to carry out security protection, as products such as perimeter alarm equipment use infrared emission alarm detector, vibration wireline, microwave wall and induction cables; Passage panalarm uses vibration detector, outdoor detector, there is the electric products such as formula detector and door status switch; The electric products such as spatial alerts equipment use microwave detector, passive infrared detector, glass break detection device and two technology detectors; Showcase panalarm adopts standing wave detector, there is the electric products such as formula detector and electric pressure sensor; Environmental monitoring product selects the fax senses such as temperature and humidity.
The LOAD CELLS based on theory of the fiber optical reported all adopts resilient material as sensitive element, by optical fiber Bragg grating encapsulation in elastomeric material surfaces or inside, employing be bridge-type shear beam or column structure.
If adopt the electricity LOAD CELLS such as traditional resistance-type, piezoelectric type, it is easily by electromagnetic interference (EMI), not easily networking, and these transducing signals are by cable power supply with transfer to central machine room, and supply line exists problem of aging, brings disaster hidden-trouble.
Existing fiber raster pattern LOAD CELLS adopts the elastic body of bridge-type shear beam or column structure as sensitive element, to be that cost is high, volume is large, measuring accuracy is low, be generally used for heavy objects weigh its shortcoming, and be not easy to cultural relics display case and combine together, historical relic cannot be met and to weigh the requirement of burglar alarm.
Summary of the invention:
The technical problem to be solved in the present invention is, there is provided a kind of and not only can realize the weighing of important historical relic, show and on-line monitoring burglar alarm, but also there is essential safety, electromagnetism interference, can large-scale network-estabilishing be realized, cost is low, measuring accuracy is high, range is large, volume is little, be easy to the fiber grating historical relic Weighing type burglar alarm sensor of the features such as assembling.
Technical solution of the present invention is, a kind of fiber grating historical relic Weighing type burglar alarm sensor with following structure is provided, it comprises shell body, base plate, four pieces of briquettings, four pieces of cylinder cushion blocks, two LC optical fiber flange interfaces and four are pasted with the sensing semi-girder of fiber grating, shell body is connected with base plate, four sensing semi-girders are all positioned at the cavity that shell body and base plate form, four pieces of briquettings lay respectively at above four sensing semi-girder stiff ends, the free end of four sensing semi-girders is distributed in four edges of base plate respectively and is connected with four pieces of cylinder cushion blocks respectively, the stiff end of four sensing semi-girders is all positioned at the center edge of base plate and is connected with four pieces of briquettings and base plate respectively, base plate is provided with four through holes slided up and down for cylinder cushion block, four pieces of cylinder cushion blocks lay respectively in four through holes, fiber grating on four sensing semi-girders is connected in series successively by LC wire jumper, fiber grating two ends after serial connection are connected with two LC optical fiber flange interfaces respectively by LC wire jumper.
After adopting above structure, the invention has the beneficial effects as follows:
1, the present invention adopts fiber grating as sensing element, make use of that fiber grating volume is little, essential safety, electromagnetism interference and be easy to the feature of large-scale network-estabilishing, achieve fiber grating historical relic Weighing type alarm sensor of the present invention and weigh at historical relic, show and function in historical relic on-line monitoring burglar alarm;
2, the present invention adopts equi intensity cantilever sensing arrangement, be the strain variation of semi-girder by historical relic weight conversion, and it is adjustable to realize range by the thickness changing semi-girder, the strain structure such as equi intensity cantilever turn avoid fiber grating and produce chirp, adopt corner support structure designs, the weight of historical relic can be decomposed respectively on each sensing semi-girder, weight and the weight change of historical relic just can be obtained by optical fiber raster center wavelength variations sum on demodulation main frame survey calculation four sensing semi-girders, and then realize the online burglar alarm monitoring of historical relic, this corner support structure designs, solve single measurement point precision low, the problem that range is little, and the impact efficiently solved because historical relic position deviation produces measurement result, substantially increase measuring accuracy of the present invention, expand range of the present invention.
3, the present invention adopts box body packaged type, and not only cost is low, volume is little, be easy to put installation, and has very strong disguise;
4, the present invention adopts the two LC optical fiber interface design of plug-in, and sensor connects simple, is easy to large-scale network-estabilishing.
Accompanying drawing illustrates:
Fig. 1 is the broken section structural representation of a kind of fiber grating historical relic of the present invention Weighing type burglar alarm sensor;
Fig. 2 is a kind of fiber grating historical relic of the present invention Weighing type burglar alarm sensor structural representation;
Fig. 3 is the structural representation of sensing semi-girder in a kind of fiber grating historical relic of the present invention Weighing type burglar alarm sensor;
Fig. 4 is the measurement system diagram of a kind of fiber grating historical relic of the present invention Weighing type burglar alarm sensor;
Fig. 5 is the present invention placement figure in counterweight position in test process;
Fig. 6 is wavelength shift-counterweight weight distribution curve figure.
Specific embodiment:
Below in conjunction with the drawings and specific embodiments, a kind of fiber grating historical relic of the present invention Weighing type burglar alarm sensor is described in further detail:
As shown in Figure 1, Figure 2 and Figure 3, a kind of fiber grating historical relic of the present invention Weighing type burglar alarm sensor comprises shell body 8, base plate 3, four pieces of briquettings 5, four pieces of cylinder cushion blocks 2, two LC optical fiber flange interfaces 7 and four sensing semi-girders 4, the axis of every root sensing semi-girder 4 is all pasted with fiber grating 10, and base plate 3 is provided with four through holes 11.Shell body 8 and base plate 3 are fixed by joint bolt 9 and are connected.Four sensing semi-girders 4 are all positioned at the cavity that shell body 8 forms with base plate 3, the free end of four sensing semi-girders 4 is distributed in four edges of base plate 3 respectively and is connected with four pieces of cylinder cushion blocks 2 respectively by supporting screw 1, four pieces of cylinder cushion blocks 2 lay respectively in four through holes 11, and the effect of cylinder cushion block 2 realizing weight transfer by being connected with semi-girder free end, supporting whole sensor.The stiff end of four sensing semi-girders 4 is all positioned at the center edge of base plate 3 and is fixedly connected with four pieces of briquettings 5 and base plate 3 respectively by trip bolt 6, and the effect of briquetting 5 is fixing sensing semi-girders 4, makes sensing semi-girder 4 stiff end uniform force.As shown in Figure 3, axis is pasted with fiber grating 10 to sensing semi-girder 4, sensing semi-girder 4 left part is provided with free end fixed orifice 13, right part is provided with stiff end fixed orifice 12, fiber grating 10 on four sensing semi-girders 4 is connected in series successively by LC wire jumper, and fiber grating 10 two ends after serial connection are connected with two LC optical fiber flange interfaces 7 respectively by LC wire jumper.Fiber grating 10 is encapsulated in four sensing cantilever beam structure surfaces, both as the weight of sensing unit perceptual object, again total is played to the effect of support.In addition, cascaded structure design is adopted can to realize measuring networking.
According to the coupled mode theory of fiber grating, the central wavelength lambda of fiber grating
bwith effective refractive index n
efffollowing relation is met with grating period A:
λ
B＝2n
effΛ (1)
From formula (1), the reflection wavelength of fiber grating depends primarily on grating period A and effective refractive index n
eff, when fiber grating experiences strain variation, elasto-optical effect can cause effective refractive index n
effchange, deformation also can cause the change of grating period A, thus causes the skew of reflected light wavelength, the ultimate principle of Here it is fiber grating strain sensor.
According to the ultimate principle of fiber grating strain sensor, in the present embodiment, the principle of work of fiber grating historical relic Weighing type burglar alarm sensor is: adopt corner support structure designs, sensing arrangement by four sensing semi-girders 4 as sensing element, when historical relic is placed on fiber grating Weighing type alarm sensor, gravity P acts on shell body 8, and then pass to briquetting 5 and sensing semi-girder 4, the free end of sensing semi-girder 4 is caused upwards deformation to occur, sensing semi-girder 4 is made to have individual amount of deflection upwards, be pasted onto the fiber grating 10 perception deformation on sensing semi-girder 4 surface, corresponding change can be there is in centre wavelength, and be the deformation of sensing semi-girder 4 by historical relic weight conversion, and be delivered to and fiber grating 10 make the raw drift of wherein cardiac wave long hair, historical relic weight and weight change is obtained after external demodulation main frame demodulation, and then realize the online burglar alarm monitoring of historical relic.
In order to further illustrate performance of the present invention, the present invention devises a kind of test macro as shown in Figure 4 and Figure 5, and we, by sensor incoming fiber optic grating demodulation device, test the performance of sensor.Be placed on by counterweight in fiber grating LOAD CELLS, observe the change of fiber grating reflection wavelength, the precision of known LOAD CELLS can reach 10g.In addition, successively 200g counterweight is added in fiber grating LOAD CELLS, the centre wavelength value of record four fiber gratings, and wavelength variations is added the wavelength shift-counterweight weight distribution curve figure depicted as shown in Figure 6.Can be found out within the scope of 0 ~ 5kg by curve, counterweight weight and fiber grating reflection wavelength drift value substantially linearly proportional.The measurement range of sensor can reach 5kg.In addition, by changing counterweight position in LOAD CELLS, the change of observed and recorded fiber bragg grating center wavelength finds, along with the change of position, the wavelength of single fiber grating can change, and four wavelength difference sums do not change.Following table is depicted as the changing value of the placement location fiber grating of change counterweight.
Above-described embodiment is only be described the preferred embodiment of the present invention; not scope of the present invention is limited; under not departing from the present invention and designing the prerequisite of spirit; the various improvement that those of ordinary skill in the art make technical scheme of the present invention, all should fall in protection domain that claims of the present invention determines.
Claims (1)
1. a fiber grating historical relic Weighing type burglar alarm sensor, it is characterized in that: it comprises shell body (8), base plate (3), four pieces of briquettings (5), four pieces of cylinder cushion blocks (2), two LC optical fiber flange interfaces (7) and four are pasted with the sensing semi-girder (4) of fiber grating (10), described shell body (8) is connected with base plate (3), four sensing semi-girders (4) are all positioned at the cavity that shell body (8) forms with base plate (3), four pieces of briquettings (5) lay respectively at above four sensing semi-girder (4) stiff ends, the free end of four sensing semi-girders (4) is distributed in four edges of base plate (3) respectively and is connected with four pieces of cylinder cushion blocks (2) respectively, the stiff end of four sensing semi-girders (4) is all positioned at the center edge of base plate (3) and is connected with four pieces of briquettings (5) and base plate (3) respectively, described base plate (3) is provided with four through holes (11) slided up and down for cylinder cushion block (2), four pieces of cylinder cushion blocks (2) lay respectively in four through holes (11), fiber grating (10) on four sensing semi-girders (4) is connected in series successively by LC wire jumper, fiber grating (10) two ends after serial connection are connected with two LC optical fiber flange interfaces (7) respectively by LC wire jumper.
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| CN201510505354.6A CN105023376B (en) | 2015-08-17 | 2015-08-17 | A kind of fiber grating historical relic Weighing type burglar alarm sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106157501A (en) * | 2016-08-26 | 2016-11-23 | 安徽中电光达通信技术有限公司 | Optical fiber historical relic guardian system |
| CN111366220A (en) * | 2020-05-06 | 2020-07-03 | 中国海洋石油集团有限公司 | Arch-shaped optical fiber weighing sensor |
| CN111521248A (en) * | 2020-05-09 | 2020-08-11 | 珠海任驰光电科技有限公司 | Fiber grating vehicle dynamic weighing sensor, device and method |
| CN112589759A (en) * | 2020-12-01 | 2021-04-02 | 机械工业第九设计研究院有限公司 | Comprehensive monitoring device for construction site of house building engineering |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020010248A (en) * | 2000-07-28 | 2002-02-04 | 이호준 | Weight measurement system using fiber optic grating sensor |
| CN1352380A (en) * | 2000-11-02 | 2002-06-05 | 株式会社岛津制作所 | Electronic balance |
| CN1873386A (en) * | 2006-06-30 | 2006-12-06 | 武汉理工大学 | Girder type dynamic weighing system based on optical fiber grating |
| CN101038205A (en) * | 2007-04-27 | 2007-09-19 | 武汉理工大学 | Chirp optical fiber grating sensor and intensity demodulation system thereof |
| JP2007263937A (en) * | 2006-03-29 | 2007-10-11 | Hokkaido Doboku Kaihatsu Kenkyusho | Axle load meter |
| CN101526389A (en) * | 2009-03-26 | 2009-09-09 | 中国计量学院 | Weighting sensor with intensity demodulation chirped fiber grating |
| CN101762308A (en) * | 2009-12-24 | 2010-06-30 | 济南金钟电子衡器股份有限公司 | Fiber Bragg grating weighing sensor |
| CN102080986A (en) * | 2009-11-30 | 2011-06-01 | 同方威视技术股份有限公司 | Fiber bragg grating vibration sensing component, fiber bragg grating vibration sensing device, vibration measuring system and method |
| CN204884016U (en) * | 2015-08-17 | 2015-12-16 | 中国电子科技集团公司第八研究所 | Fiber grating historical relic weighing type siren operated sensor that prevents burglary |
-
2015
- 2015-08-17 CN CN201510505354.6A patent/CN105023376B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020010248A (en) * | 2000-07-28 | 2002-02-04 | 이호준 | Weight measurement system using fiber optic grating sensor |
| CN1352380A (en) * | 2000-11-02 | 2002-06-05 | 株式会社岛津制作所 | Electronic balance |
| JP2007263937A (en) * | 2006-03-29 | 2007-10-11 | Hokkaido Doboku Kaihatsu Kenkyusho | Axle load meter |
| CN1873386A (en) * | 2006-06-30 | 2006-12-06 | 武汉理工大学 | Girder type dynamic weighing system based on optical fiber grating |
| CN101038205A (en) * | 2007-04-27 | 2007-09-19 | 武汉理工大学 | Chirp optical fiber grating sensor and intensity demodulation system thereof |
| CN101526389A (en) * | 2009-03-26 | 2009-09-09 | 中国计量学院 | Weighting sensor with intensity demodulation chirped fiber grating |
| CN102080986A (en) * | 2009-11-30 | 2011-06-01 | 同方威视技术股份有限公司 | Fiber bragg grating vibration sensing component, fiber bragg grating vibration sensing device, vibration measuring system and method |
| CN101762308A (en) * | 2009-12-24 | 2010-06-30 | 济南金钟电子衡器股份有限公司 | Fiber Bragg grating weighing sensor |
| CN204884016U (en) * | 2015-08-17 | 2015-12-16 | 中国电子科技集团公司第八研究所 | Fiber grating historical relic weighing type siren operated sensor that prevents burglary |
Non-Patent Citations (1)
| Title |
|---|
| 石丹: ""光纤光栅动态称重传感器研究"", 《中国优秀硕士学位论文全文数据库 信息科技辑》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106157501A (en) * | 2016-08-26 | 2016-11-23 | 安徽中电光达通信技术有限公司 | Optical fiber historical relic guardian system |
| CN106157501B (en) * | 2016-08-26 | 2018-05-11 | 安徽中电光达通信技术有限公司 | Optical fiber historical relic guardian system |
| CN111366220A (en) * | 2020-05-06 | 2020-07-03 | 中国海洋石油集团有限公司 | Arch-shaped optical fiber weighing sensor |
| CN111366220B (en) * | 2020-05-06 | 2022-03-15 | 中国海洋石油集团有限公司 | Arch-shaped optical fiber weighing sensor |
| CN111521248A (en) * | 2020-05-09 | 2020-08-11 | 珠海任驰光电科技有限公司 | Fiber grating vehicle dynamic weighing sensor, device and method |
| CN111521248B (en) * | 2020-05-09 | 2021-07-06 | 珠海任驰光电科技有限公司 | Fiber grating vehicle dynamic weighing sensor, device and method |
| CN112589759A (en) * | 2020-12-01 | 2021-04-02 | 机械工业第九设计研究院有限公司 | Comprehensive monitoring device for construction site of house building engineering |
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| CN105023376B (en) | 2017-09-12 |
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