CN106157501A - Optical fiber historical relic guardian system - Google Patents
Optical fiber historical relic guardian system Download PDFInfo
- Publication number
- CN106157501A CN106157501A CN201610736285.4A CN201610736285A CN106157501A CN 106157501 A CN106157501 A CN 106157501A CN 201610736285 A CN201610736285 A CN 201610736285A CN 106157501 A CN106157501 A CN 106157501A
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- Prior art keywords
- optical fiber
- cantilever beam
- cushion block
- historical relic
- contained
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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
- G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
- G08B13/1472—Mechanical actuation by lifting or attempted removal of hand-portable articles with force or weight detection
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/14—Mechanical actuation by lifting or attempted removal of hand-portable articles
- G08B13/1481—Mechanical actuation by lifting or attempted removal of hand-portable articles with optical detection
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
A kind of optical fiber historical relic guardian system, by light source, optical circulator, sensor, grating demodulation unit and central processing system composition, light source is connected with optical circulator signal, optical circulator is connected with grating demodulation cell signal, grating demodulation unit is connected with central processing system signal, sensor includes pedestal, fixing post, cantilever beam, upper optical fiber, lower optical fiber, first cushion block, compensating plate, second cushion block and loading end, cantilever beam left end is connected with pedestal by fixing post, first cushion block is contained in cantilever beam right-hand member, upper optical fiber is contained on cantilever beam end face, lower optical fiber is contained on cantilever beam bottom surface, lower optical fiber is connected with upper fiber-optic signal, upper optical fiber is connected with optical circulator signal, compensating plate right-hand member is contained in the first cushion block top, compensating plate left end is positioned at base central position, second cushion block is contained in compensating plate left end, loading end is contained in the second cushion block top.The present invention avoids using electric equipment during nurse historical relic, thus avoids the problems such as aging circuit, the short circuit that electric equipment brings.
Description
Technical field
The present invention relates to that historical relic is antitheft guards field, be especially a kind of optical fiber historical relic guardian system.
Background technology
Historical relic is one national history of witness, achievement and the material remnants of culture life, contains and embodies China
The national humanistic quality condensed during formation and development.It has the highest art, rich connotation, and many of which is worked as
Time be stuff, hand down to posterity so far, still there is enjoying value, and use for reference when can be used for creating the new art work.Historical relic is additionally
One the most all showpiece of most important feature all has non-renewable, and a lot of collections are all lonely product, and it leaves over the spy of quantity
The self-value that different property determines showpiece is limitless, because rarity, the appreciating of historical relic and historic significance, causes it to have
High economic worth.In the last few years, high price taken in international auction activity repeatedly by the historical relic antique of China, which results in robber
The concern of thieves, theft happens occasionally.Meanwhile, the cultural relic conservation life-span is also relevant with ambient temperature, and different historical relics are to control environment
Temperature requirements is different, and too high or too low different to historical relic injury, more serious prevents fires exactly, particularly ancient architecture and inflammable class
Historical relic, major part is wooden structures, and fire load is big, and fire resistance rating is low, applies today frequently at electrical equipment, is more vulnerable to
Fire damage.
At present, at home and abroad a new generation's preservation of cultural relics technology commonly used electric sensor product carries out security protection, such as, week
Boundary's warning device uses the products such as infrared emission alarm detector, vibration wireline, microwave wall and induction cable；Passage warning device
Use vibration detector, outdoor detector, there is the electric products such as formula detector and door status switch；Spatial alerts uses microwave to visit
Survey the electric products such as device, passive infrared detector, glass break detection device and double technology detectors；Showcase warning device uses and stays
Wave detector, there is the electric products such as formula detector and electric pressure sensor；Environmental monitoring product selects the electricity such as temperature and humidity
Sensing, these transducing signals are by cable power supply and transmit to central machine room.The said equipment nurse historical relic time, employing be all
Electricity sensing technology, as used electric oscillation detection, standing wave detection and the technology such as infrared, although also be able to the mesh reaching to nurse historical relic
, but be all electrical equipment due to it, inevitably there is the problems such as aging, short-circuit, there is disaster hidden-trouble in supply line.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of optical fiber historical relic guardian system, keeps away during nurse historical relic
Exempt to use electric equipment, thus avoid the problems such as aging circuit, the short circuit that electric equipment brings.
The technical solution of the present invention is to provide a kind of optical fiber historical relic guardian system with following structure, by light source,
Optical circulator, sensor, grating demodulation unit and central processing system composition, light source is connected with optical circulator signal, light annular
Device is connected with grating demodulation cell signal, and grating demodulation unit is connected with central processing system signal, and sensor includes pedestal, consolidates
Fixed column, cantilever beam, upper optical fiber, lower optical fiber, the first cushion block, compensating plate, the second cushion block and loading end, cantilever beam uses equal strength
Beam, cantilever beam left end is connected with pedestal by fixing post, and the first cushion block is contained in cantilever beam right-hand member top, and upper optical fiber is vertically installed in outstanding
On arm top surface of the beam, lower optical fiber is vertically installed on cantilever beam bottom surface, and lower optical fiber one end is connected with upper optical fiber one end signal, and upper optical fiber is another
One end is connected with optical circulator signal, and compensating plate right-hand member is contained in the first cushion block top, and compensating plate left end is positioned at base central position,
Second cushion block is contained in compensating plate left end top, and loading end is contained in the second cushion block top.
Optical fiber historical relic guardian system of the present invention, wherein, sensor also includes elastomer, and elastomer is contained in pedestal
On, and be positioned at below cantilever beam right-hand member.
Optical fiber historical relic guardian system of the present invention, wherein, loading end periphery is provided with the protection pillar downwardly extended,
Between protection pillar and pedestal, the stroke that moves up and down of loading end is provided with gap.
Optical fiber historical relic guardian system of the present invention, wherein, cantilever beam end face and bottom surface all offers longitudinal fluting,
Two longitudinal flutings are symmetrical above and below, and are respectively positioned on cantilever beam middle part, and upper optical fiber and lower optical fiber are attached separately to two longitudinal directions
In groove.
Optical fiber historical relic guardian system of the present invention, wherein, elastomer uses spring.
After using above structure, compared with prior art, optical fiber historical relic guardian system of the present invention has the advantage that this
The fiber grating sensing technology that bright employing is up-to-date, front end sensors and transmission channel all use optical fiber and other passive device, tool
There is essential safety, nurse hidden, without electrical ageing hidden danger, life-span length and jamproof advantage.In other words, optical fiber of the present invention literary composition
Thing guardian system is avoided using electric equipment during nurse historical relic, eliminates circuit in existing fax sense warning device old
The problems such as the electrical safety hidden danger that change, short circuit etc. is brought, it also avoid during regular update MTTY maintenance typewriter sense warning device possible
The historical relic risk of damage brought.
The effect that auxiliary boom beam position is recovered is played in the setting of elastomer.
Protection pillar can be avoided when placing historical relic overload phenomenon, plays protection cantilever beam action.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of optical fiber historical relic guardian system of the present invention；
Fig. 2 is the main TV structure schematic diagram of sensor in optical fiber historical relic guardian system of the present invention.
Detailed description of the invention
With detailed description of the invention, optical fiber historical relic guardian system of the present invention is described in further detail below in conjunction with the accompanying drawings:
For sake of convenience, "left", "right" described below is consistent with the left and right direction of Fig. 2 itself.
As depicted in figs. 1 and 2, in this embodiment, optical fiber historical relic guardian system of the present invention is by light source, light annular
Device, sensor, grating demodulation unit and central processing system composition, light source is connected with optical circulator signal by optical fiber, the ring of light
Shape device is connected with grating demodulation cell signal by optical fiber, and grating demodulation unit is by wire with central processing system signal even
Connect, sensor include pedestal 17, fixing post 18, cantilever beam 13, upper optical fiber 10, lower optical fiber the 19, first cushion block 15, compensating plate 14,
Second cushion block 12 and loading end 11, cantilever beam 13 uses beam of uniform strength structure, the so-called beam of uniform strength to be each cross sections of fingerboard
On maximum (normal) stress the most equal, and all reach the allowable stress of material, cantilever beam 13 left end passes through screw and three fixing posts
18 are connected with pedestal 17, and the first cushion block 15 is contained in cantilever beam 13 right-hand member top by screw, and upper optical fiber 10 is vertically installed in cantilever beam
On 13 end faces, lower optical fiber 19 is vertically installed on cantilever beam 13 bottom surface, and longitudinal direction here refers to the length direction along cantilever beam 13,
Lower optical fiber 19 right-hand member is connected with upper optical fiber 10 right-hand member signal, and lower optical fiber 19 left end can not connect, it is also possible to is concatenated into the present invention another
On the light mouth of one sensor, upper optical fiber 10 left end is connected with optical circulator signal, and compensating plate 14 right-hand member is contained in by screw
One cushion block 15 top, compensating plate 14 left end is positioned at pedestal 17 centre, and it is left that the second cushion block 12 is contained in compensating plate 14 by screw
End top, loading end 11 is contained in the second cushion block 12 top by screw, and loading end 11 is used for placing historical relic, compensating plate 14 here
Play the effect that the inclination to loading end 11 compensates, in other words, when loading end 11 run-off the straight because of the placement of historical relic
Time, under the compensating action of compensating plate 14, loading end 11 can be in level all the time.
The sensor also includes that elastomer 16, elastomer 16 are contained on pedestal 17, and is positioned at below cantilever beam 13 right-hand member,
Described elastomer 16 uses spring, elastomer 16 to play the effect that auxiliary boom beam 13 position is recovered.
Overload phenomenon occurs during for preventing and placing historical relic on loading end 11, and loading end 11 periphery is provided with and downwardly extends
Protection pillar 20, is provided with gap according to the stroke that moves up and down of loading end 11 between protection pillar 20 and pedestal 17, works as placement
During the historical relic of approrpiate wts, loading end 11 can fluctuate in this interstice coverage, and when the historical relic placed is overweight, protection
Post 20 then can directly withstand on pedestal 17, thus prevents loading end 11 from continuing to move down, and plays overload protective function.Additionally,
After protection pillar 20 is set to a coil structures, it can be by the second cushion block 12, compensating plate the 14, first cushion block together with loading end 11
15, cantilever beam 13 and fixing post 18 are surrounded, and play disguise.
In order to upper optical fiber 10 and lower optical fiber 19 are preferably arranged on cantilever beam 13, on cantilever beam 13 end face and bottom surface all
Offering longitudinal fluting, two longitudinal flutings are symmetrical above and below, and are respectively positioned on cantilever beam 13 middle part, upper optical fiber 10 and lower light
Fine 19 are attached separately in two longitudinal flutings, it is noted here that before it is packaged, it is necessary first to upper optical fiber 10 and lower light
Fine 19 a certain amount of prestressing force, it is therefore an objective to improve detection sensitivity, then be packaged fixing with epoxy glue, meet sensing tolerance
The use requirement of journey.
Above-mentioned cantilever beam 13 uses super-elastic metal material to make, and other accessory of sensing arrangement all uses metal material system
Making, Precision Machining, surface carries out anti-oxidant treatment.
Seeing that Fig. 2, cantilever beam 13 are that one end beam freely is fixed in one end, as elastic sensing element, its feature is structure
Simply, easy to process.When being acted on the free end of cantilever beam 13 by dynamometry Q, from material mechanics principle, the beam of uniform strength
Upper and lower surface arbitrfary point strain size is the most equal, is directly proportional to free end stress size, is encapsulated in the glazing of its end face and bottom surface
Fibre 10 and lower optical fiber 19 will not occur chirp phenomenon.Equal strength elastomer strain stress expression formula is:
Wherein, Q is the power that free end applies, and L is beam length, and E is the elastic modelling quantity of beam, and b is beam fixing end width, and h is
The thickness of beam.
Fiber grating operation principle: when light wave transmissions is by Fiber Bragg Grating FBG, meet Bragg grating wavelength bar
The light wave vector of part (λ B=2neff Λ) will be reflected back (neff represents fibre core effective refractive index, and Λ represents screen periods), this
Sample incident illumination will be divided into two parts: transmission light and reflection light.Every fiber grating all correspond to one completing when
Individual centre wavelength, this centre wavelength is relevant with the temperature of fiber grating present position, and both meet linear output relationship.One
In fixed scope, when the strain of fiber grating or temperature change, grating effective refractive index neff and grating period A
Can change.The wavelength of the reflecting light received also can change, by demodulating the information of reflection wavelength, it is possible to obtain institute
The physical quantity information needed.
When grating is by extraneous axial stress, wavelength conversion exists with strain:
Wherein, αfBeing the thermal coefficient of expansion of optical fiber, ξ is the thermal coefficient of expansion of fiber optic materials, and Δ Τ is temperature change value, Pe
Elasto-optical coefficient for fiber optic materials.
Thus, after fiber grating (upper optical fiber 10 and lower optical fiber 19) is encapsulated on cantilever beam 13, the ripple of fiber grating
There is certain relation in long drift and external force:
Cantilever beam 13 upper and lower surface fiber grating stress changes all coincidence formulas 1, during due to cantilever beam 13 by downward pressure,
One side stretching, one side compression, deformation change is contrary, gives wavelength and external force relational expression respectively according to fiber optic materials grating bin differences
Middle variations in temperature item is multiplied by temperature correction coefficient again, and taking both wavelength variable quantity differences affects to eliminate variations in temperature, and wavelength becomes
Change only relevant to external pressure, it is achieved pressure measxurement.
As eliminating variations in temperature impact, in the wavelength change formula (formula 3) of cantilever beam 13 upper and lower surface grating
Deformation quantity is multiplied by deformation correction coefficient, takes the sum of the amount of becoming of two gratings, thus eliminates STRESS VARIATION to total wavelength change shadow
Ring, the most relevant to temperature, it is possible to achieve temperature survey.
Seeing Fig. 2, when historical relic is positioned on loading end 11, pressure is successively through the second cushion block 12, compensating plate 14 and the first pad
Block 15 is transferred to cantilever beam 13, and cantilever beam 13 deforms upon, and makes the upper optical fiber 10 on cantilever beam 13 end face be stretched, on bottom surface
Lower optical fiber 19 is compressed, and forms differential complement structure, improves detection sensitivity, and the reflection light of upper optical fiber 10 and lower optical fiber 19 is respectively
Exported by modulation.
See that Fig. 1, light source send broadband light, incide sensor through optical circulator, the upper optical fiber 10 in sensor and lower light
Respective wavelength is reflected back into optical circulator by fine 19, in the 3rd mouthful of output of optical circulator to grating demodulation unit, grating demodulation
Wavelength is demodulated by unit, and wavelength information is delivered to central processing system, information calibrated by this central processing system,
After calculating, obtain the temperature and load information needed, load information amplitude of variation situation is differentiated, decide whether alarm.
It is to carry out on computers that data process, and mainly comprises temperature calibration and two aspects of signal alarming processing.Temperature
Demarcation is that the signal of the upper optical fiber 10 received and lower optical fiber 19 is carried out additive operation, carries out thermometer scale according to the value after calculating
Fixed, every 5 DEG C, a fixed point is set, the formula that carries out curve fitting in the range of-20 DEG C～60 DEG C is demarcated.Signal alarming processing
It is that the signal of the upper optical fiber 10 received and lower optical fiber 19 is carried out subtraction, the value after experiment calculation and the relation of load,
Making least square fitting, the minimum pressure sensitivity index according to being given calculates change wavelength, as Alarm.Place
Collection data are stored by reason system every time, then compare front and back's data, update data message simultaneously.
For ensureing antitheft purpose, not allowing burglar find and put on display attractive in appearance, optical fiber historical relic guardian system of the present invention also has hidden
Covering property.The present invention use the sensor of fiber grating cantilever beam lifting type structure to nurse historical relic, have pollution-free, fanout free region,
Without potential risk and the generally fiber optic applications feature such as work reliably and with long-term, can low wrong report, highly reliably nurse historical relic whether be moved
Dynamic, report historical relic this locality temperature information, prevent unexpected generation.The present invention thoroughly solves to make the potential risk of power demand sensor at cabinet
Or historical relic is without situation about nursing at cabinet, has extremely strong environmental suitability simultaneously.
Historical relic deadweight and grating strain sensing technology are combined by optical fiber historical relic guardian system of the present invention, utilize and lift mode
Realizing nursing at cabinet historical relic, around historical relic, visual place is without any additament, has extremely strong disguise.
Optical fiber historical relic guardian system of the present invention is a kind of new technique proposed according to historical relic's protection new demand, i.e. realizes peace
Prevent and temperature detection, essential safety simultaneously, eliminate the electrical safety hidden danger of fax sense alarm detection system, be to substitute electricity class security
The historical relic's protection product of new generation of product, this product uses grating sensing technique simultaneously, can couple networking, forms optical fiber historical relic
Palladium is networked, and has very important practical value and economic worth.
Operation principle of the present invention: see Fig. 2, after being placed into by historical relic on loading end 11 and being stable, the pressure of historical relic can be successively
Being transferred to cantilever beam 13 through the second cushion block 12, compensating plate 14 and the first cushion block 15, there is corresponding deformation in cantilever beam 13, and drives
Optical fiber 10 and lower optical fiber 19 deform upon and keep, and the reflected light signal in upper optical fiber 10 and lower optical fiber 19 is through optical circulator and light
Grid demodulating unit is transmitted back to central processing system, it is thus achieved that corresponding pressure information.When historical relic keeps constant, pressure information is not
Becoming, after historical relic is stolen, cantilever beam 13 pressure experienced changes, and makes the reflected light signal of optical fiber 10 and lower optical fiber 19 also
Changing, there is change in the pressure information after demodulation, and the changing value of pressure information exceedes presetting thresholding, sends historical relic quilt
Steal alarm.
In this embodiment, described light source, optical circulator, grating demodulation unit and central processing system are
Commercially available prod, it is fixedly mounted in the casing of backstage (such as OPS), and sensor is then positioned at front end (on exhibition booth), directly
Contacting with historical relic, the optical interface dust cap of this sensor protects, and sensor uses grating technology, has the life-span long,
Without electromagnetic interference, can be placed on below historical relic by long-term cloth, be not required to change.
Embodiment described above is only to be described the preferred embodiment of the present invention, the not model to the present invention
Enclose and be defined, on the premise of designing spirit without departing from the present invention, the those of ordinary skill in the art technical side to the present invention
Various deformation that case is made and improvement, all should fall within the scope of protection of the present invention.
Claims (5)
1. an optical fiber historical relic guardian system, it is characterised in that: by light source, optical circulator, sensor, grating demodulation unit and in
Heart processing system forms, and described light source is connected with optical circulator signal, and described optical circulator is connected with grating demodulation cell signal,
Described grating demodulation unit is connected with central processing system signal, and described sensor includes pedestal (17), fixing post (18), cantilever
Beam (13), upper optical fiber (10), lower optical fiber (19), the first cushion block (15), compensating plate (14), the second cushion block (12) and loading end
(11), described cantilever beam (13) uses the beam of uniform strength, and described cantilever beam (13) left end is by fixing post (18) with pedestal (17) even
Connecing, described first cushion block (15) is contained in cantilever beam (13) right-hand member top, and described upper optical fiber (10) is vertically installed in cantilever beam (13) top
On face, described lower optical fiber (19) is vertically installed on cantilever beam (13) bottom surface, described lower optical fiber (19) one end and upper optical fiber (10) one
End signal connects, and upper optical fiber (10) other end is connected with optical circulator signal, and described compensating plate (14) right-hand member is contained in the first cushion block
(15) top, described compensating plate (14) left end is positioned at pedestal (17) centre, and described second cushion block (12) is contained in compensating plate
(14) left end top, described loading end (11) is contained in the second cushion block (12) top.
Optical fiber historical relic guardian system the most according to claim 1, it is characterised in that: described sensor also includes elastomer
(16), described elastomer (16) is contained on pedestal (17), and is positioned at below cantilever beam (13) right-hand member.
Optical fiber historical relic guardian system the most according to claim 2, it is characterised in that: described loading end (11) periphery is provided with
The protection pillar (20) downwardly extended, moving up and down according to loading end (11) between described protection pillar (20) and pedestal (17)
Stroke is provided with gap.
Optical fiber historical relic guardian system the most according to claim 3, it is characterised in that: described cantilever beam (13) end face and bottom surface
On all offer longitudinal fluting, two longitudinal flutings are symmetrical above and below, and are respectively positioned on cantilever beam (13) middle part, described glazing
Fine (10) and lower optical fiber (19) are attached separately in two longitudinal flutings.
Optical fiber historical relic guardian system the most according to claim 4, it is characterised in that: described elastomer (16) uses spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610736285.4A CN106157501B (en) | 2016-08-26 | 2016-08-26 | Optical fiber historical relic guardian system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610736285.4A CN106157501B (en) | 2016-08-26 | 2016-08-26 | Optical fiber historical relic guardian system |
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| Publication Number | Publication Date |
|---|---|
| CN106157501A true CN106157501A (en) | 2016-11-23 |
| CN106157501B CN106157501B (en) | 2018-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610736285.4A Active CN106157501B (en) | 2016-08-26 | 2016-08-26 | Optical fiber historical relic guardian system |
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| US20020141700A1 (en) * | 2001-02-22 | 2002-10-03 | Teraxion Inc. | Adjustable athermal package for optical fiber devices |
| CN1384341A (en) * | 2002-06-14 | 2002-12-11 | 清华大学 | Optical-fiber grating sensor detecting pressure temperature simultaneously |
| KR20080041106A (en) * | 2006-11-06 | 2008-05-09 | 이금석 | Apparatus and method for detecting intrusion using fbg sensors |
| CN203586742U (en) * | 2013-11-13 | 2014-05-07 | 南京博物院 | Microwave vacuum drying system with combination of weighing function and optical fiber temperature detection function |
| CN204064522U (en) * | 2014-08-14 | 2014-12-31 | 中国地质调查局水文地质环境地质调查中心 | Quasi-distributed landslide soil pressure real-time monitoring device |
| 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 |
| CN206058428U (en) * | 2016-08-26 | 2017-03-29 | 安徽中电光达通信技术有限公司 | Optical fiber historical relic guardian system |
-
2016
- 2016-08-26 CN CN201610736285.4A patent/CN106157501B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020141700A1 (en) * | 2001-02-22 | 2002-10-03 | Teraxion Inc. | Adjustable athermal package for optical fiber devices |
| CN1384341A (en) * | 2002-06-14 | 2002-12-11 | 清华大学 | Optical-fiber grating sensor detecting pressure temperature simultaneously |
| KR20080041106A (en) * | 2006-11-06 | 2008-05-09 | 이금석 | Apparatus and method for detecting intrusion using fbg sensors |
| CN203586742U (en) * | 2013-11-13 | 2014-05-07 | 南京博物院 | Microwave vacuum drying system with combination of weighing function and optical fiber temperature detection function |
| CN204064522U (en) * | 2014-08-14 | 2014-12-31 | 中国地质调查局水文地质环境地质调查中心 | Quasi-distributed landslide soil pressure real-time monitoring device |
| 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 |
| CN206058428U (en) * | 2016-08-26 | 2017-03-29 | 安徽中电光达通信技术有限公司 | Optical fiber historical relic guardian system |
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| Publication number | Publication date |
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| CN106157501B (en) | 2018-05-11 |
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