CN113009617B - Fiber bragg grating signal demodulation device and demodulation method - Google Patents
Fiber bragg grating signal demodulation device and demodulation method Download PDFInfo
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- CN113009617B CN113009617B CN202110136963.4A CN202110136963A CN113009617B CN 113009617 B CN113009617 B CN 113009617B CN 202110136963 A CN202110136963 A CN 202110136963A CN 113009617 B CN113009617 B CN 113009617B
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- 239000000835 fiber Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000428 dust Substances 0.000 claims abstract description 55
- 238000010438 heat treatment Methods 0.000 claims abstract description 37
- 230000007246 mechanism Effects 0.000 claims abstract description 34
- 230000000670 limiting effect Effects 0.000 claims abstract description 29
- 230000009471 action Effects 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims description 15
- 230000008859 change Effects 0.000 claims description 8
- 230000003068 static effect Effects 0.000 claims description 6
- 241000883990 Flabellum Species 0.000 claims description 5
- 244000309464 bull Species 0.000 claims description 5
- 239000003292 glue Substances 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 7
- 239000013307 optical fiber Substances 0.000 description 7
- 238000005192 partition Methods 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02171—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for compensating environmentally induced changes
- G02B6/02176—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for compensating environmentally induced changes due to temperature fluctuations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/268—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light using optical fibres
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02195—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for tuning the grating
- G02B6/022—Refractive index modulation gratings, e.g. Bragg gratings characterised by means for tuning the grating using mechanical stress, e.g. tuning by compression or elongation, special geometrical shapes such as "dog-bone" or taper
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02057—Optical fibres with cladding with or without a coating comprising gratings
- G02B6/02076—Refractive index modulation gratings, e.g. Bragg gratings
- G02B6/02209—Mounting means, e.g. adhesives, casings
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Abstract
The invention belongs to the technical field of fiber bragg gratings, in particular to a fiber bragg grating signal demodulation device and a fiber bragg grating signal demodulation method, aiming at the problems that a temperature compensation device heats the fiber bragg grating unevenly and not quickly, dust is easy to be stained on the fiber bragg grating, and experimental data is affected, the fiber bragg grating signal demodulation device comprises a pressure adjusting mechanism, a temperature compensation mechanism, an angle adjusting mechanism and a grating, wherein the temperature compensation mechanism comprises a rectangular box, heating holes distributed at equal intervals are formed in the outer wall of the top of the rectangular box, a heating box is fixedly connected to the inner wall of the top of the rectangular box, and a hot air blower is fixedly connected to the outer wall of one side of the heating box. According to the invention, the air heater is arranged, the air flow flows into the heating box when the air heater is started, and under the action of the speed limiting plate, the air flow flowing out of each heating hole is the same, so that the grating is uniformly heated and quickly heated, and the dust screen on the speed limiting plate can play a dust-proof role on the air flow.
Description
Technical Field
The invention relates to the technical field of fiber bragg gratings, in particular to a fiber bragg grating signal demodulation device and a demodulation method.
Background
The optical fiber grating is a diffraction grating formed by axially and periodically modulating the refractive index of an optical fiber core by a certain method, and is a passive filter device. The grating optical fiber has the advantages of small volume, small welding loss, full compatibility with optical fiber, embedding of intelligent materials and the like, and the resonance wavelength is sensitive to the change of external environments such as temperature, strain, refractive index, concentration and the like, so that the grating optical fiber is widely applied to the fields of manufacturing optical fiber lasers, optical fiber communication and sensing.
In the fiber grating signal demodulation device, a fiber grating sensor is needed, and the influence of the external environment temperature on the fiber grating is great, mainly because the change of the temperature can cause the change of the effective refractive index and the grating distance of the fiber grating, the temperature compensation is needed, and the heating of the fiber grating by the existing temperature compensation device is uneven and not rapid, and the fiber grating is easy to be stained with dust, thereby influencing experimental data.
Disclosure of Invention
Based on the technical problems that the existing temperature compensation device is uneven and not rapid in heating of the fiber bragg grating and is easy to be stained with dust so as to influence experimental data, the invention provides a fiber bragg grating signal demodulation device and a fiber bragg grating signal demodulation method.
The invention provides a fiber grating signal demodulation device and a demodulation method, wherein the fiber grating signal demodulation device comprises a pressure adjustment mechanism, a temperature compensation mechanism, an angle adjustment mechanism and a grating, the temperature compensation mechanism comprises a rectangular box, heating holes distributed equidistantly are formed in the outer wall of the top of the rectangular box, the inner wall of the top of the rectangular box is fixedly connected with a heating box, an air heater is fixedly connected to the outer wall of one side of the heating box, an air outlet pipe is inserted into one end of an output shaft of the air heater, the air outlet pipe is communicated with the heating box, a partition plate distributed equidistantly is fixedly connected to the outer wall of the bottom of the rectangular box, a speed limiting plate is hinged to the outer wall of one side of the partition plate, two dustproof nets are fixedly connected to the outer walls of the opposite sides of the speed limiting plate, vertical rods distributed equidistantly are fixedly connected to the inner wall of the bottom of the heating box, round rods are fixedly connected with round rods, springs II and round rings are sleeved on the outer walls of the two sides of the vertical rods, one ends of the round rods are fixedly connected with fixing blocks, one ends of the springs II are fixedly connected with the fixing blocks, the other ends of the round rings are fixedly connected with the round rings, movable rods are hinged to the outer walls of the round rings, the movable rods are hinged to the round rods, and the dust collection mechanism is hinged to the round rods.
Preferably, dust absorption mechanism includes spring three, bull stick and pivot, and spring three and round bar fixed connection, the one end fixedly connected with fur of spring three, and the pivot passes through the bearing connection with the top outer wall of montant, and the flabellum has been cup jointed to the outer wall of pivot, and the outer wall fixedly connected with equidistance of pivot distributes the rubber stick, and the rubber stick contacts with the fur.
Preferably, one end of the rotating rod is connected with the speed limiting plate through a bearing, the outer wall of the rotating rod is fixedly connected with wind plates distributed at equal intervals, the outer wall of the rotating rod is fixedly connected with an elastic rod, one end of the elastic rod is fixedly connected with a ball, and the ball is in contact with the dust screen.
Preferably, the pressure regulating mechanism comprises a screw rod, the screw rod is opposite in thread direction from the middle to two sides, a driven gear is sleeved in the middle of the outer wall of the screw rod, a motor is fixedly connected with the inner wall of the bottom of the rectangular box, a driving gear is sleeved at one end of an output shaft of the motor, the driving gear is meshed with the driven gear, two sides of the outer wall of the screw rod are respectively provided with a sliding block II through threaded connection, two sides of the inner wall of the bottom of the rectangular box are respectively provided with a sliding rail II, and the sliding blocks II and the sliding rails II form sliding fit.
Preferably, the top outer wall fixedly connected with of slider two adjusts the pole, and adjusts the one end of pole and articulate there is slider one, the equal fixedly connected with fixed plate in top outer wall both sides of rectangle case, one side outer wall fixedly connected with bracing piece of fixed plate, the one end of bracing piece articulates there is the connecting rod, one side outer wall of connecting rod is provided with slide rail one, slide rail one forms sliding fit with slider one.
Preferably, the mounting hole has been seted up to one side outer wall of fixed plate, and the inner wall grafting of mounting hole has the clamping lever, and the one end of clamping lever articulates mutually with the one end of connecting rod, the outer wall fixedly connected with dog of clamping lever, one side outer wall fixedly connected with spring of dog one, one end and fixed plate fixed connection of spring one, the other end fixedly connected with locating plate of clamping lever.
Preferably, the angle adjusting mechanism comprises a bottom box, the top outer wall of the bottom box is provided with a rectangular groove, two sides of the top outer wall of the bottom box are fixedly connected with rectangular plates, one side outer wall of each rectangular plate is rotationally connected with a rotating plate, and the top outer wall of each rotating plate is fixedly connected with the bottom outer wall of each rectangular box.
Preferably, the inside of base case is provided with the protractor, and one side inner wall fixedly connected with telescopic link of base case, and the piston rod one end of telescopic link articulates there is the slider three, and one side outer wall of rotor plate is provided with the slide rail three, and slide rail three forms sliding fit with the slider three.
A demodulation method of fiber grating signal includes the following steps:
s1: the distance between the two locating plates is adjusted according to the length of the grating, the motor is started, the screw rod is rotated under the action of the driving gear and the driven gear, the screw rod acts on the second sliding block to move along the second sliding rail, the adjusting rod acts on the connecting rod, and the connecting rod acts on the clamping rod to move the clamping rod, so that the distance between the locating plates can be adjusted.
S2: after the distance is adjusted, the grating is fixed on the positioning plate through screws or glue, so that the grating can be pressed or stretched, the grating distance of the grating is adjusted, and the wavelength can be adjusted through the change of the grating distance.
S3: the temperature compensation mechanism is started to heat the air, the air flow flows into the heating box by starting the air heater, the speed limiting plate can rotate upwards under the action of the impact force of the air flow, the speed limiting plate can act on the movable rod to enable the circular ring to move along the circular rod, the air flow can be limited under the action of the elastic force of the second spring, the air flow flowing out of each heating hole is the same, the gratings are uniformly heated, and the dust screen on the speed limiting plate can play a dust-proof role on the air flow.
S4: the wind-force board can drive the bull stick and rotate under the air current effect, and then makes the ball flap the dust screen, makes the dust on the dust screen flap, and the flabellum can rotate under the effect that runs into high-speed air current, and then drives the rubber stick and rotate, and the rubber stick rubs with the fur and can produce static, adsorbs the dust, prevents that the dust from causing the jam to the dust screen.
S5: the expansion of the expansion link can enable the sliding block to move along the sliding rail, and then the rotating plate can rotate around the rectangular plate, the angle of the grating can be adjusted according to the angle measuring plate, and the wavelength can be adjusted according to the rotating angle.
S6: the fiber grating demodulation device demodulates the driving signal through the demodulation data unit, transmits the driving signal to the computer equipment for calculation, and solves the external strain signal, and the grating is protected through the temperature compensation mechanism, so that the accuracy and precision of the fiber grating demodulation device are improved.
The beneficial effects of the invention are as follows:
this fiber bragg grating signal demodulation device, through being provided with the air heater, the start-up of air heater makes the air current flow into the heating cabinet in, can make the speed limiting plate upwards rotate under the impact force effect of air current, and the speed limiting plate will act on the movable rod and make the ring follow the round bar and remove, just can play a restriction effect to the air current under the elasticity effect of spring two, just so can make the air current that every heating hole flows the same, and then evenly heat and heat fast to the grating, and the dust screen on the speed limiting plate can play a dustproof effect to the air current.
According to the fiber bragg grating signal demodulation device, the motor is arranged, the motor is started, the screw rod is rotated under the action of the driving gear and the driven gear, the screw rod acts on the second sliding rail to move, the adjusting rod acts on the connecting rod, the connecting rod acts on the clamping rod to move, so that the grating on the positioning plate can be pressed or stretched, the grating distance of the grating is adjusted, and the wavelength can be adjusted through the change of the grating distance.
This fiber bragg grating signal demodulation device through being provided with the wind-force board, and the wind-force board can drive the bull stick and rotate under the air current effect, and then makes the ball beat the dust screen, makes the dust on the dust screen beat and falls, and the flabellum can rotate under the effect that runs into high-speed air current, and then drives the rubber stick and rotate, and the rubber stick rubs with the fur and can produce static, adsorbs the dust, prevents that the dust from causing the jam to the dust screen.
This fiber bragg grating signal demodulation device through being provided with the telescopic link, and the flexible slider three can be made along three removal of slide rail to the telescopic link, and then can rotate the swivelling plate round rectangular plate, can carry out angle modulation to the grating according to the volume scute, can adjust the wavelength according to pivoted angle.
None of the parts of the device are the same as or can be implemented using prior art.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a fiber grating signal demodulation device and a demodulation method according to the present invention;
fig. 2 is an enlarged schematic diagram of a position a of a fiber bragg grating signal demodulation device and a demodulation method according to the present invention;
FIG. 3 is a schematic diagram of a cross-sectional structure of a rectangular box of a fiber grating signal demodulation device and a demodulation method according to the present invention;
fig. 4 is a schematic diagram of an enlarged structure of a B-site of a fiber grating signal demodulation device and a demodulation method according to the present invention;
FIG. 5 is a schematic diagram of a fiber grating signal demodulating apparatus and a rotating rod structure of a demodulating method according to the present invention;
FIG. 6 is a schematic diagram of a cross-sectional structure of a bottom case of a fiber grating signal demodulation device and a demodulation method according to the present invention;
fig. 7 is a schematic diagram of a demodulation structure of a fiber grating signal demodulation device and a demodulation method according to the present invention.
In the figure: 1. a rectangular box; 2. a connecting rod; 3. a fixing plate; 4. a positioning plate; 5. a grating; 6. an adjusting rod; 7. a first sliding block; 8. heating the hole; 9. a bottom box; 10. a rectangular plate; 11. rectangular grooves; 12. a rotating plate; 13. a first spring; 14. a clamping rod; 15. a stop block; 16. a support rod; 17. a heating box; 18. a partition plate; 19. a speed limiting plate; 20. an air heater; 21. a screw rod; 22. a second slide block; 23. a motor; 24. a second slide rail; 25. a dust screen; 26. a rotating rod; 27. a movable rod; 28. a second spring; 29. a round bar; 30. a circular ring; 31. a third spring; 32. a vertical rod; 33. fur; 34. a rubber rod; 35. a fan blade; 36. a wind plate; 37. a ball; 38. a telescopic rod; 39. a third slide block; 40. and measuring angle plates.
Description of the embodiments
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to FIGS. 1-7, a fiber bragg grating signal demodulation device and a demodulation method, comprising a pressure adjusting mechanism, a temperature compensating mechanism, an angle adjusting mechanism and a grating 5, wherein the temperature compensating mechanism comprises a rectangular box 1, heating holes 8 distributed equidistantly are arranged on the top outer wall of the rectangular box 1, the top inner wall of the rectangular box 1 is fixedly connected with a heating box 17, one side outer wall of the heating box 17 is fixedly connected with a hot air blower 20, one end of an output shaft of the hot air blower 20 is inserted with an air outlet pipe, the air outlet pipe is communicated with the heating box 17, the bottom outer wall of the rectangular box 1 is fixedly connected with a partition plate 18 distributed equidistantly, one side outer wall of the partition plate 18 is hinged with a speed limiting plate 19, the opposite side outer walls of the two speed limiting plates 19 are fixedly connected with the same dustproof net 25, the bottom inner wall of the heating box 17 is fixedly connected with vertical rods 32 distributed equidistantly, the round rod 29 is fixedly connected to the outer walls of the two sides of the vertical rod 32, the spring II 28 and the circular ring 30 are respectively sleeved on the outer walls of the round rod 29, a fixed block is fixedly connected to one end of the round rod 29, one end of the spring II 28 is fixedly connected with the fixed block, the other end of the spring II 28 is fixedly connected with the circular ring 30, the movable rod 27 is hinged to the outer wall of the circular ring 30, one end of the movable rod 27 is hinged to the speed limiting plate 19, a dust collection mechanism is arranged above the round rod 29, the air heater 20 is started to enable air flow to flow into the heating box 17, the speed limiting plate 19 can be enabled to rotate upwards under the impact force of the air flow, the movable rod 27 is enabled to enable the circular ring 30 to move along the round rod 29, the air flow can be enabled to have a flow limiting effect under the elastic force of the spring II 28, thus the air flow flowing out of each heating hole 8 is identical, and the grating 5 is evenly heated, while the dust screen 25 on the speed limiting plate 19 can play a dust-proof role for the air flow.
In the invention, the dust collection mechanism comprises a spring III 31, a rotating rod 26 and a rotating shaft, the spring III 31 is fixedly connected with a round rod 29, one end of the spring III 31 is fixedly connected with a fur 33, the rotating shaft is connected with the top outer wall of a vertical rod 32 through a bearing, the outer wall of the rotating shaft is sleeved with fan blades 35, the outer wall of the rotating shaft is fixedly connected with rubber rods 34 distributed equidistantly, the rubber rods 34 are contacted with the fur 33, the fan blades 35 can rotate under the action of high-speed air flow, the rubber rods 34 are driven to rotate, static electricity can be generated due to friction between the rubber rods 34 and the fur 33, dust is adsorbed, and the dust is prevented from blocking the dust screen 25.
In the invention, one end of a rotating rod 26 is connected with a speed limiting plate 19 through a bearing, wind plates 36 distributed equidistantly are fixedly connected to the outer wall of the rotating rod 26, an elastic rod is fixedly connected to the outer wall of the rotating rod 26, a ball 37 is fixedly connected to one end of the elastic rod, the ball 37 is contacted with a dust screen 25, the wind plates 36 can drive the rotating rod 26 to rotate under the action of air flow, and then the ball 37 beats the dust screen 25, so that dust on the dust screen 25 falls down to facilitate the adsorption of a rubber rod 34.
According to the invention, the pressure regulating mechanism comprises a screw rod 21, the screw threads of the screw rod 21 are opposite in direction from the middle to two sides, a driven gear is sleeved in the middle of the outer wall of the screw rod 21, a motor 23 is fixedly connected to the inner wall of the bottom of the rectangular box 1, a driving gear is sleeved at one end of an output shaft of the motor 23 and meshed with the driven gear, two sides of the outer wall of the screw rod 21 are connected with a slide block II 22 through threads, two sides of the inner wall of the bottom of the rectangular box 1 are provided with slide rails II 24, the slide block II 22 and the slide rails II 24 form sliding fit, the motor 23 is started, the screw rod 21 is rotated under the action of the driving gear and the driven gear, and the screw rod 21 acts on the slide block II 22 to move along the slide rails II 24.
According to the invention, the top outer wall of the second slider 22 is fixedly connected with the adjusting rod 6, one end of the adjusting rod 6 is hinged with the first slider 7, both sides of the top outer wall of the rectangular box 1 are fixedly connected with the fixing plate 3, one side outer wall of the fixing plate 3 is fixedly connected with the supporting rod 16, one end of the supporting rod 16 is hinged with the connecting rod 2, one side outer wall of the connecting rod 2 is provided with the first sliding rail, the first sliding rail and the first slider 7 form sliding fit, and the adjusting rod 6 acts on the first slider 7 to enable the first slider 7 to move along the first sliding rail.
In the invention, a mounting hole is formed in the outer wall of one side of a fixed plate 3, a clamping rod 14 is inserted into the inner wall of the mounting hole, one end of the clamping rod 14 is hinged with one end of a connecting rod 2, the outer wall of the clamping rod 14 is fixedly connected with a stop block 15, one side outer wall of the stop block 15 is fixedly connected with a first spring 13, one end of the first spring 13 is fixedly connected with the fixed plate 3, the other end of the clamping rod 14 is fixedly connected with a positioning plate 4, and the connecting rod 2 rotates around a supporting rod 16 to push the clamping rod 14 to move, so that the distance of the positioning plate 4 can be adjusted.
According to the invention, the angle adjusting mechanism comprises a bottom box 9, rectangular grooves 11 are formed in the top outer wall of the bottom box 9, rectangular plates 10 are fixedly connected to two sides of the top outer wall of the bottom box 9, a rotating plate 12 is rotatably connected to one side outer wall of each rectangular plate 10, the top outer wall of each rotating plate 12 is fixedly connected with the bottom outer wall of the rectangular box 1, and the angle of the grating 5 can be adjusted through the rotating plate 12.
According to the invention, the bottom box 9 is internally provided with the angle measuring plate 40, the inner wall of one side of the bottom box 9 is fixedly connected with the telescopic rod 38, one end of a piston rod of the telescopic rod 38 is hinged with the sliding block III 39, the outer wall of one side of the rotating plate 12 is provided with the sliding rail III, the sliding rail III and the sliding block III form sliding fit, the sliding block III 39 can be moved along the sliding rail III by the telescopic rod 38, the rotating plate 12 can be further rotated around the rectangular plate 10, the angle of the grating 5 can be adjusted according to the angle measuring plate 40, and the wavelength can be adjusted according to the rotating angle.
A demodulation method of fiber grating signal includes the following steps:
s1: the distance between the two positioning plates 4 is adjusted according to the length of the grating 5, the motor 23 is started, the screw rod 21 is rotated under the action of the driving gear and the driven gear, the screw rod 21 acts on the second slide block 22 to move along the second slide rail 24, the adjusting rod 6 acts on the connecting rod 2, the connecting rod 2 acts on the clamping rod 14 to move, and therefore the distance between the positioning plates 4 can be adjusted.
S2: after the distance is adjusted, the grating 5 is fixed on the positioning plate 4 through screws or glue, so that the grating 5 can be pressed or stretched, the grating distance of the grating 5 is adjusted, and the wavelength can be adjusted through the change of the grating distance.
S3: the temperature compensation mechanism is started to heat the air, the air heater 20 is started to enable the air flow to flow into the heating box 17, the speed limiting plate 19 can be rotated upwards under the impact force of the air flow, the speed limiting plate 19 can act on the movable rod 27 to enable the circular ring 30 to move along the circular rod 29, the air flow can be limited under the elastic force of the spring II 28, so that the air flow flowing out of each heating hole 8 is identical, the grating 5 is uniformly heated, and the dust screen 25 on the speed limiting plate 19 can play a dust-proof role on the air flow.
S4: the wind-force board 36 can drive the bull stick 26 rotation under the air current effect, and then makes ball 37 beat dust screen 25, makes dust on the dust screen 25 beat down, and flabellum 35 can rotate under the effect of meetting high-speed air current, and then drives rubber stick 34 and rotate, and rubber stick 34 rubs with fur 33 and can produce static, adsorbs the dust, prevents that the dust from causing the jam to dust screen 25.
S5: the extension and retraction of the extension rod 38 can enable the sliding block III 39 to move along the sliding rail III, so that the rotating plate 12 can rotate around the rectangular plate 10, the angle of the grating 5 can be adjusted according to the angle measuring plate 40, and the wavelength can be adjusted according to the rotating angle.
S6: the fiber grating demodulation device demodulates the driving signal through the demodulation data unit, transmits the driving signal to the computer equipment for calculation, and solves the external strain signal, and the grating 5 is protected through the temperature compensation mechanism, so that the accuracy and precision of the fiber grating demodulation device are improved.
Working principle: firstly, the distance between the two positioning plates 4 is adjusted according to the length of the grating 5, the motor 23 is started, the screw rod 21 is rotated under the action of the driving gear and the driven gear, the screw rod 21 acts on the second slide block 22 to move along the second slide rail 24, the adjusting rod 6 acts on the first slide block 7 to move the first slide block 7 along the first slide rail, the connecting rod 2 rotates around the supporting rod 16 to push the clamping rod 14 to move, so that the distance between the positioning plates 4 can be adjusted to the length matched with the grating 5, the grating 5 is fixed on the positioning plates 4 through screws or glue, the grating 5 can be pressed or stretched, the grating distance of the grating 5 can be adjusted, and the wavelength can be adjusted through the change of the grating distance; the temperature compensation mechanism is started to heat the air, the air heater 20 is started to enable the air flow to flow into the heating box 17, the speed limiting plate 19 can be rotated upwards under the impact force of the air flow, the speed limiting plate 19 can act on the movable rod 27 to enable the circular ring 30 to move along the circular rod 29, the air flow can be limited under the elastic force of the spring II 28, so that the air flow flowing out of each heating hole 8 is identical, the grating 5 is uniformly heated, and the dust screen 25 on the speed limiting plate 19 can play a dust-proof role on the air flow; the wind plate 36 drives the rotating rod 26 to rotate under the action of air flow, so that the round balls 37 flap the dust screen 25, dust on the dust screen 25 is flap, the fan blades 35 can rotate under the action of high-speed air flow, the rubber rod 34 is driven to rotate, static electricity is generated when the rubber rod 34 rubs with the fur 33, the dust is adsorbed, and the dust is prevented from blocking the dust screen 25; the extension and retraction of the extension rod 38 can enable the sliding block III 39 to move along the sliding rail III, so that the rotating plate 12 can be rotated around the rectangular plate 10, the angle of the grating 5 can be adjusted according to the angle measuring plate 40, and the wavelength can be adjusted according to the rotating angle; the fiber grating demodulation device demodulates the driving signal through the demodulation data unit, transmits the driving signal to the computer equipment for calculation, and solves the external strain signal, and the grating 5 is protected through the temperature compensation mechanism, so that the accuracy and precision of the fiber grating demodulation device are improved.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (7)
1. The utility model provides a fiber grating signal demodulation device, includes pressure adjustment mechanism, temperature compensation mechanism, angle adjustment mechanism and grating, its characterized in that, temperature compensation mechanism includes the rectangle case, and the top outer wall of rectangle case is provided with the equidistance and distributes the heating hole, the top inner wall fixedly connected with heating cabinet of rectangle case, and one side outer wall fixedly connected with air heater of heating cabinet, the output shaft one end grafting of air heater has the outlet duct, and the outlet duct is linked together with the heating cabinet, the bottom outer wall fixedly connected with equidistance division board of rectangle case, and one side outer wall hinge of division board has the speed limit board, two the opposite side outer wall fixedly connected with same dust screen of speed limit board, and the bottom inner wall fixedly connected with montant that the equidistance distributes of heating cabinet, the both sides outer wall of montant all fixedly connected with round bar, and the outer wall of round bar cup joint spring two and ring respectively, the one end fixedly connected with fixed block of round bar, and fixed connection of one end and fixed block, the other end and the round ring fixedly connected with movable rod, the one end of movable rod is articulated with the round pin, the round pin roll rod is connected with the round pin roll rod through the same round pin roll rod, the side of the round pin roll rod is connected with the same round pin roll rod, the round pin roll rod is connected with the side of the round pin roll rod, and the round pin roll rod is connected with the round rod through the round pin roll rod, the end of the round rod, and the round pin roll rod, the round rod is connected with the round rod through the end of roll rod, and the round rod through the round rod, and the round rod and the end round rod fixed connection end round rod and the round rod fixed end spindle and the round rod fixed round rod and the round rod and fixed spindle and the round rod fixed spindle and fixed blade, one end fixedly connected with ball of elastic rod, ball contact with the dust screen, the start-up of air heater makes the air current flow into the heating cabinet, can make the speed limit board upwards rotate under the impact force effect of air current, and the speed limit board will act on movable rod and make the ring follow the round rod and remove, just can play a restriction effect to the air current under the elasticity effect of spring two.
2. The fiber bragg grating signal demodulation device according to claim 1, wherein the pressure adjusting mechanism comprises a screw rod, the screw rod is opposite in thread direction from the middle to two sides, a driven gear is sleeved in the middle of the outer wall of the screw rod, a motor is fixedly connected to the inner wall of the bottom of the rectangular box, a driving gear is sleeved at one end of an output shaft of the motor, the driving gear is meshed with the driven gear, two sides of the outer wall of the screw rod are respectively provided with a sliding block II through threads, two sides of the inner wall of the bottom of the rectangular box are respectively provided with a sliding rail II, and the sliding blocks II are in sliding fit with the sliding rails II.
3. The fiber bragg grating signal demodulation device according to claim 2, wherein an adjusting rod is fixedly connected to the outer wall of the top of the second slider, one end of the adjusting rod is hinged to the first slider, two sides of the outer wall of the top of the rectangular box are fixedly connected with fixing plates, one side of each fixing plate is fixedly connected with a supporting rod, one end of each supporting rod is hinged to a connecting rod, one side of each connecting rod is provided with a first sliding rail, and the first sliding rail is in sliding fit with the first slider.
4. The fiber bragg grating signal demodulation device according to claim 3, wherein the mounting hole is formed in the outer wall of one side of the fixing plate, the clamping rod is inserted into the inner wall of the mounting hole, one end of the clamping rod is hinged to one end of the connecting rod, the stop block is fixedly connected to the outer wall of the clamping rod, the first spring is fixedly connected to the outer wall of one side of the stop block, one end of the first spring is fixedly connected with the fixing plate, and the locating plate is fixedly connected to the other end of the clamping rod.
5. The fiber bragg grating signal demodulation device according to claim 1, wherein the angle adjusting mechanism comprises a bottom box, a rectangular groove is formed in the outer wall of the top of the bottom box, rectangular plates are fixedly connected to two sides of the outer wall of the top of the bottom box, a rotating plate is rotatably connected to one side outer wall of each rectangular plate, and the outer wall of the top of each rotating plate is fixedly connected with the outer wall of the bottom of each rectangular box.
6. The fiber bragg grating signal demodulation device according to claim 5, wherein an angle measuring plate is arranged in the bottom box, a telescopic rod is fixedly connected to the inner wall of one side of the bottom box, a sliding block III is hinged to one end of a piston rod of the telescopic rod, a sliding rail III is arranged on the outer wall of one side of the rotating plate, and the sliding rail III and the sliding block III form sliding fit.
7. A fiber grating signal demodulation apparatus according to any one of claims 1-6, a method of demodulating a wavelength, comprising the steps of:
s1: firstly, the distance between two positioning plates is adjusted according to the length of a grating, a motor is started, a screw rod is rotated under the action of a driving gear and a driven gear, the screw rod acts on a second sliding block to move along a second sliding rail, an adjusting rod acts on a connecting rod, and the connecting rod acts on a clamping rod to move, so that the distance between the positioning plates can be adjusted;
s2: after the distance is adjusted, the grating is fixed on the positioning plate through screws or glue, so that the grating can be pressed or stretched, the grating distance of the grating is adjusted, and the wavelength can be adjusted through the change of the grating distance;
s3: the temperature compensation mechanism is started to heat the air, the air flow flows into the heating box by starting the air heater, the speed limiting plate can rotate upwards under the impact force of the air flow, the speed limiting plate can act on the movable rod to enable the circular ring to move along the circular rod, the air flow can be limited under the elastic force of the second spring, so that the air flow flowing out of each heating hole is the same, the grating is uniformly heated, and the dust screen on the speed limiting plate can play a dust-proof role on the air flow;
s4: the wind-force board can drive the bull stick to rotate under the air current effect, and then makes the ball flap the dust screen, makes the dust on the dust screen flap, and the flabellum can rotate under the effect of meetting high-speed air current, and then drives the rubber stick and rotates, and rubber stick rubs with the fur and can produce static, adsorbs the dust, prevents that the dust from leading to the fact the jam to the dust screen;
s5: the telescopic rod stretches and contracts to enable the sliding block III to move along the sliding rail III, so that the rotating plate can rotate around the rectangular plate, the angle of the grating can be adjusted according to the angle measuring plate, and the wavelength can be adjusted according to the rotating angle;
s6: the fiber grating demodulation device demodulates the driving signal through the demodulation data unit, transmits the driving signal to the computer equipment for calculation, and solves the external strain signal, and the grating is protected through the temperature compensation mechanism, so that the accuracy and precision of the fiber grating demodulation device are improved.
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