CN113009617A - Fiber grating signal demodulation device and demodulation method - Google Patents
Fiber grating signal demodulation device and demodulation method Download PDFInfo
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- CN113009617A CN113009617A CN202110136963.4A CN202110136963A CN113009617A CN 113009617 A CN113009617 A CN 113009617A CN 202110136963 A CN202110136963 A CN 202110136963A CN 113009617 A CN113009617 A CN 113009617A
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- 239000000835 fiber Substances 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000428 dust Substances 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 230000000670 limiting effect Effects 0.000 claims abstract description 29
- 230000000694 effects Effects 0.000 claims description 11
- 238000005192 partition Methods 0.000 claims description 7
- 230000003068 static effect Effects 0.000 claims description 6
- 241000883990 Flabellum Species 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 4
- 244000309464 bull Species 0.000 claims description 4
- 239000003292 glue Substances 0.000 claims description 4
- 230000003405 preventing effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 239000013307 optical fiber Substances 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007858 starting material Substances 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 gratings, and particularly relates to a fiber grating signal demodulating device and a demodulating method, aiming at the problems that the fiber gratings are heated unevenly and not fast enough by some temperature compensation devices, and are easily polluted by dust, so that experimental data are influenced, the invention provides the following scheme. The grating heating device is provided with the air heater, the air heater is started to enable air flow to flow into the heating box, the air flow flowing out of each heating hole is enabled to be the same under the action of the speed limiting plate, the grating is uniformly heated and is rapidly heated, and the dustproof net on the speed limiting plate can play a dustproof 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 fiber grating is a diffraction grating formed by axially and periodically modulating the refractive index of a fiber core of an optical fiber through a certain method, and is a passive filter device. The grating fiber has the advantages of small volume, low welding loss, full compatibility with the fiber, embedding of intelligent materials and the like, and the resonance wavelength of the grating fiber is sensitive to the changes of external environments such as temperature, strain, refractive index, concentration and the like, so the grating fiber is widely applied to the fields of manufacturing fiber lasers, fiber communication and sensing.
In fiber grating signal demodulating equipment, need use the fiber grating sensor, and external environment temperature is very big to fiber grating's influence, mainly because temperature variation can arouse the change of fiber grating effective refractive index and grid pitch, so need carry out temperature compensation, and current temperature compensation device is inhomogeneous and not fast enough to fiber grating's heating, and makes it be infected with the dust easily, and then influences the experimental data.
Disclosure of Invention
The invention provides a fiber grating signal demodulation device and a fiber grating signal demodulation method based on the technical problems that the existing temperature compensation device heats a fiber grating unevenly and not fast enough, and the fiber grating is easy to be contaminated by dust, so that experimental data is influenced.
The invention provides a fiber bragg grating signal demodulating device and a demodulating method, which comprise a pressure adjusting mechanism, a temperature compensating mechanism, an angle adjusting mechanism and a grating, wherein the temperature compensating mechanism comprises a rectangular box, heating holes are distributed equidistantly on 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, a hot air blower is fixedly connected with 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 hot air blower and communicated with the heating box, partition plates are distributed equidistantly and fixedly connected with the outer wall of the bottom of the rectangular box, speed limiting plates are hinged to the outer wall of one side of each partition plate, the outer walls of the two opposite sides of the two speed limiting plates are fixedly connected with the same dustproof net, vertical rods are distributed equidistantly and fixedly connected with the inner wall of the bottom of the, and the outer wall of round bar has cup jointed spring two and ring respectively, the one end fixedly connected with fixed block of round bar, and the one end and the fixed block fixed connection of spring two, the other end and the ring fixed connection of spring two, and the outer wall of ring articulates there is the movable rod, the one end and the speed limit board of movable rod are articulated, and the top of round bar is provided with dust absorption mechanism.
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 with the top outer wall of montant to be connected, and the outer wall of pivot has cup jointed the flabellum, and the outer wall fixedly connected with equidistant distribution's of pivot rubber stick, rubber stick and fur contact.
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 round ball, and the round ball is in contact with the dust screen.
Preferably, the pressure adjusting device comprises a lead screw, the direction of the thread of the lead screw is opposite from the middle to the direction of the thread of the two sides, a driven gear is sleeved in the middle of the outer wall of the lead screw, 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 and meshed with the driven gear, two sliding blocks are connected to two sides of the outer wall of the lead screw through threads, two sliding rails are arranged on two sides of the inner wall of the bottom of the rectangular box, and the two sliding blocks.
Preferably, the top outer wall fixedly connected with of slider two adjusts the pole, and the one end of adjusting the pole articulates 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, a mounting hole is formed in the outer wall of one side of the fixing plate, a 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, a check block is fixedly connected to the outer wall of the clamping rod, a first spring is fixedly connected to the outer wall of one side of the check block, one end of the first spring is fixedly connected to the fixing plate, and a positioning plate is fixedly connected to the other end of the clamping rod.
Preferably, angle adjustment mechanism includes the under casing, and the top outer wall of under casing is provided with the rectangular channel, the equal fixedly connected with rectangular plate in top outer wall both sides of under casing, and one side outer wall of rectangular plate rotates and is connected with the rotor plate, the top outer wall of rotor plate and the bottom outer wall fixed connection of rectangular box.
Preferably, the inside of under casing is provided with the angulometry board, and one side inner wall fixedly connected with telescopic link of under casing, and the piston rod one end of telescopic link articulates there is slider three, and one side outer wall of rotor plate is provided with slide rail three, and slide rail three forms sliding fit with slider three.
A fiber grating signal demodulation device, a method for demodulating wavelength, comprising the following steps:
s1: the distance between 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 enable the clamping rod to move, 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 compressed or stretched, the grating pitch of the grating is adjusted, and the wavelength can be adjusted through the change of the grating pitch.
S3: the temperature compensation mechanism is started to heat the heating box, the air flow flows into the heating box by starting the air heater, the speed limiting plate can rotate upwards under the impact force action 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, a current limiting effect can be achieved on the air flow under the elastic action of the second spring, the air flow flowing out of each heating hole is enabled to be the same, the grating is uniformly heated, and the dust screen on the speed limiting plate can achieve a dust preventing effect on the air flow.
S4: the wind plate can drive the bull stick and rotate under the air current effect, and then makes the ball pat the dust screen, makes the dust on the dust screen clap, and the flabellum can rotate under the effect that meets high-speed air current, and then drives the rubber stick and rotate, and the rubber stick can produce static with the fur friction, adsorbs the dust, prevents that the dust from causing the jam to the dust screen.
S5: the telescopic link stretch out and draw back can make three edge slide rails removals of slider, and then can rotate the rotor plate around rectangular plate, according to the angulometer board, can be in order to carry out angle modulation to the grating, can adjust the wavelength according to the pivoted angle.
S6: the fiber grating demodulating device demodulates the driving signal through the demodulation data unit, transmits the driving signal to computer equipment for calculation, calculates an external strain signal, protects the grating through the temperature compensation mechanism, and improves the accuracy and precision of the fiber grating demodulating device.
The beneficial effects of the invention are as follows:
1. this fiber grating signal demodulating equipment, through being provided with the air heater, the start-up of air heater makes the air current flow in the heating cabinet, enable the speed limit board and up rotate under the impact force effect of air current, the speed limit board will act on the movable rod and make the ring remove along the round bar, just can play a current-limiting effect to the air current under the elasticity effect of spring two, just so can make the air current that every heated hole flows be the same, and then heat grating even heating and heat fast, and the dust screen on the speed limit board can play a dustproof effect to the air current.
2. This fiber grating signal demodulating equipment through being provided with the motor, starter motor makes the lead screw rotate under driving gear and driven gear's effect, and the lead screw acts on two removals along slide rail of slider, adjusts the pole and acts on the connecting rod, and the connecting rod acts on the clamping bar and makes its removal, just so can compress tightly or stretch the grating on the locating plate, and then adjusts the gate pitch of grating, and the change of gate pitch just can adjust the wavelength.
3. This fiber grating signal demodulating equipment through being provided with wind-force board, and wind-force board can drive the bull stick under the air current effect and rotate, and then makes the ball pat the dust screen, makes the dust on the dust screen pat, and the flabellum can rotate under the effect that meets high-speed air current, and then drives the rubber stick and rotate, and the rubber stick can produce static with the fur friction, adsorbs the dust, prevents that the dust from causing the jam to the dust screen.
4. This fiber grating signal demodulating equipment, through being provided with the telescopic link, the flexible three removal of slide rail along of slider that can make of telescopic link, and then can rotate the turning plate around rectangular plate, according to the angulation board, can be in order to carry out angle modulation to the grating, can adjust the wavelength according to the pivoted angle.
The parts of the device not involved are the same as or can be implemented using prior art.
Drawings
Fig. 1 is a schematic diagram of an overall structure of an optical fiber grating signal demodulation apparatus and a demodulation method according to the present invention;
fig. 2 is a schematic diagram of an amplifying structure at a position a of a fiber grating signal demodulating apparatus and a demodulating method according to the present invention;
FIG. 3 is a schematic cross-sectional view of a rectangular box of the fiber grating signal demodulation apparatus and demodulation method according to the present invention;
fig. 4 is a schematic diagram of an amplifying structure at B of an optical fiber grating signal demodulating apparatus and demodulating method according to the present invention;
FIG. 5 is a schematic diagram of a rotating rod structure of a fiber grating signal demodulation apparatus and a demodulation method according to the present invention;
FIG. 6 is a schematic cross-sectional view of a bottom box of an optical fiber grating signal demodulation apparatus and demodulation method according to the present invention;
fig. 7 is a schematic diagram of a demodulation structure of a fiber grating signal demodulation apparatus 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. positioning a plate; 5. a grating; 6. adjusting a rod; 7. a first sliding block; 8. heating the hole; 9. a bottom box; 10. a rectangular plate; 11. a rectangular groove; 12. a rotating plate; 13. a first spring; 14. a clamping lever; 15. a stopper; 16. a support bar; 17. a heating box; 18. a partition plate; 19. a speed limiting plate; 20. a hot air blower; 21. a screw rod; 22. a second sliding 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 sliding block; 40. a corner measuring plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Referring to fig. 1-7, a fiber grating signal demodulating device and demodulating method, including a pressure adjusting mechanism, a temperature compensating mechanism, an angle adjusting mechanism and a grating 5, the temperature compensating mechanism includes a rectangular box 1, and the top outer wall of the rectangular box 1 is provided with heating holes 8 distributed equidistantly, the top inner wall of the rectangular box 1 is fixedly connected with a heating box 17, and one side outer wall of the heating box 17 is fixedly connected with a hot air blower 20, one end of the output shaft of the hot air blower 20 is inserted with an air outlet pipe, and the air outlet pipe is communicated with the heating box 17, the bottom outer wall of the rectangular box 1 is fixedly connected with partition plates 18 distributed equidistantly, and one side outer wall of the partition plate 18 is hinged with speed limiting plates 19, the opposite side outer walls of the two speed limiting plates 19 are fixedly connected with a same dustproof net 25, and the bottom inner wall of the heating box 17 is fixedly connected with vertical rods 32 distributed equidistantly, and the outer wall of the round rod 29 is respectively sleeved with a second spring 28 and a ring 30, one end of the round rod 29 is fixedly connected with a fixed block, one end of the second spring 28 is fixedly connected with the fixed block, the other end of the second spring 28 is fixedly connected with the circular ring 30, and the outer wall of the circular ring 30 is hinged with a movable rod 27, one end of the movable rod 27 is hinged with the speed limiting plate 19, and a dust suction mechanism is arranged above the round rod 29, the starting of the air heater 20 causes the air flow to flow into the heating box 17, the speed-limiting plate 19 can rotate upwards under the impact force of the airflow, 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 second spring 28 can limit the airflow, so that the airflow from each heating hole 8 is the same, thereby heating the grating 5 uniformly, and the dustproof net 25 on the speed limiting plate 19 can play a dustproof role in the air flow.
In the invention, the dust collection mechanism comprises a spring III 31, a rotating rod 26 and a rotating shaft, wherein 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 outer wall of the top of a vertical rod 32 through a bearing, fan blades 35 are sleeved on the outer wall of the rotating shaft, rubber rods 34 distributed at equal intervals are fixedly connected on the outer wall of the rotating shaft, the rubber rods 34 are in contact with the fur 33, the fan blades 35 can rotate under the action of high-speed airflow, and then the rubber rods 34 are driven to rotate, and the rubber rods 34 and the fur 33 generate static electricity through friction to adsorb dust, so that the dust is prevented from blocking.
In the invention, one end of a rotating rod 26 is connected with a speed limiting plate 19 through a bearing, the outer wall of the rotating rod 26 is fixedly connected with wind power plates 36 distributed at equal intervals, the outer wall of the rotating rod 26 is fixedly connected with an elastic rod, one end of the elastic rod is fixedly connected with a round ball 37, the round ball 37 is in contact with a dustproof net 25, the wind power plates 36 can drive the rotating rod 26 to rotate under the action of air flow, and then the round ball 37 can flap the dustproof net 25, so that dust on the dustproof net 25 can flap down and be conveniently adsorbed by a rubber rod 34.
According to the invention, the pressure adjusting device comprises a screw rod 21, the screw rod 21 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 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 sliding blocks 22 are connected to two sides of the outer wall of the screw rod 21 through threads, two sliding rails 24 are arranged on two sides of the inner wall of the bottom of the rectangular box 1, the sliding blocks 22 are in sliding fit with the sliding rails 24, the motor 23 is started, the screw rod 21 is rotated under the action of the driving gear and the driven gear, and the.
According to the invention, the adjusting rod 6 is fixedly connected to the outer wall of the top of the second sliding block 22, the first sliding block 7 is hinged to one end of the adjusting rod 6, the fixing plates 3 are fixedly connected to two sides of the outer wall of the top of the rectangular box 1, the supporting rod 16 is fixedly connected to the outer wall of one side of each fixing plate 3, the connecting rod 2 is hinged to one end of each supporting rod 16, the first sliding rail is arranged on the outer wall of one side of each connecting rod 2, the first sliding rail and the first sliding block 7 form sliding fit, and the adjusting rod 6 acts on.
According to the invention, a mounting hole is formed in the outer wall of one side of the fixing 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 to one end of the connecting rod 2, a stop block 15 is fixedly connected to the outer wall of the clamping rod 14, a spring I13 is fixedly connected to the outer wall of one side of the stop block 15, one end of the spring I13 is fixedly connected with the fixing plate 3, a positioning plate 4 is fixedly connected to the other end of the clamping rod 14, 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.
According to the invention, the angle adjusting mechanism comprises a bottom box 9, a rectangular groove 11 is formed in the outer wall of the top of the bottom box 9, rectangular plates 10 are fixedly connected to two sides of the outer wall of the top of the bottom box 9, a rotating plate 12 is rotatably connected to the outer wall of one side of each rectangular plate 10, the outer wall of the top of each rotating plate 12 is fixedly connected with the outer wall of the bottom of the rectangular box 1, and the angle of the grating 5 can be adjusted through the rotating plates 12.
According to the invention, the angle measuring plate 40 is arranged in the bottom box 9, the telescopic rod 38 is fixedly connected to the inner wall of one side of the bottom box 9, the third sliding block 39 is hinged to one end of the piston rod of the telescopic rod 38, the third sliding rail is arranged on the outer wall of one side of the rotating plate 12, the third sliding rail is in sliding fit with the third sliding block 39, the third sliding block 39 can move along the third sliding rail due to the telescopic rod 38, the rotating plate 12 can rotate around the rectangular plate 10, the grating 5 can be subjected to angle adjustment according to the angle measuring plate 40, and the wavelength can be adjusted according to the rotating angle.
A fiber grating signal demodulation device, a method for demodulating wavelength, comprising the following steps:
s1: 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 sliding block 22 to move along the second sliding rail 24, the adjusting rod 6 acts on the connecting rod 2, and the connecting rod 2 acts on the clamping rod 14 to move, so that 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 compressed or stretched, the grating pitch of the grating 5 is adjusted, and the wavelength can be adjusted through the change of the grating pitch.
S3: the temperature compensation mechanism is started to heat the heating box, the air current flows into the heating box 17 by starting the air heater 20, the speed limiting plate 19 can rotate upwards under the impact force of the air current, 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, and the air current can be limited under the elastic force of the spring II 28, so that the air current flowing out of each heating hole 8 is the same, the grating 5 is uniformly heated, and the dust screen 25 on the speed limiting plate 19 can play a dustproof role on the air current.
S4: the wind plate 36 can drive the rotating rod 26 to rotate under the action of the airflow, so that the ball 37 can flap the dust screen 25, dust on the dust screen 25 can flap, the fan blades 35 can rotate under the action of the high-speed airflow, and the rubber rod 34 is driven to rotate, the rubber rod 34 and the fur 33 can generate static electricity through friction, the dust is adsorbed, and the dust is prevented from blocking the dust screen 25.
S5: the expansion of the expansion link 38 can move the third slide block 39 along the third slide rail, and further can rotate the rotating plate 12 around the rectangular plate 10, so that the grating 5 can be angularly adjusted according to the angle measuring plate 40, and the wavelength can be adjusted according to the rotating angle.
S6: the fiber grating demodulating device demodulates the driving signal through the demodulation data unit, transmits the driving signal to computer equipment for calculation, calculates an external strain signal, and protects the grating 5 through the temperature compensation mechanism, so that the accuracy and precision of the fiber grating demodulating device are improved.
The working principle is as follows: firstly, the distance between two positioning plates 4 is adjusted according to the length of a grating 5, a motor 23 is started, a screw rod 21 is rotated under the action of a driving gear and a driven gear, the screw rod 21 acts on a second sliding block 22 to move along a second sliding rail 24, an adjusting rod 6 acts on a first sliding block 7 to move the first sliding block 7 along the first sliding rail, a connecting rod 2 rotates around a supporting rod 16 to push a clamping rod 14 to move, the distance of 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 compressed or stretched, the grating pitch of the grating 5 is adjusted, and the wavelength can be adjusted through the change of the grating pitch; the temperature compensation mechanism is started to heat the heating box, the air current flows into the heating box 17 by starting the hot air blower 20, the speed limiting plate 19 can rotate upwards under the impact force of the air current, 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, and the air current can be limited under the elastic force of the second spring 28, so that the air current flowing out of each heating hole 8 is the same, the grating 5 is uniformly heated, and the dust screen 25 on the speed limiting plate 19 can play a dustproof role on the air current; the wind plate 36 can drive the rotating rod 26 to rotate under the action of the airflow, so that the round ball 37 can flap the dustproof net 25 to enable dust on the dustproof net 25 to flap, the fan blades 35 can rotate under the action of high-speed airflow to drive the rubber rod 34 to rotate, the rubber rod 34 and the fur 33 can generate static electricity through friction, the dust is adsorbed, and the dust is prevented from blocking the dustproof net 25; the expansion of the expansion link 38 can enable the third slide block 39 to move along the third slide rail, so that the rotating plate 12 can rotate around the rectangular plate 10, the grating 5 can be subjected to angle adjustment according to the angle measuring plate 40, and the wavelength can be adjusted according to the rotating angle; the fiber grating demodulating device demodulates the driving signal through the demodulation data unit, transmits the driving signal to computer equipment for calculation, calculates an external strain signal, and protects the grating 5 through the temperature compensation mechanism, so that the accuracy and precision of the fiber grating demodulating device are improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A fiber bragg grating signal demodulating device comprises a pressure adjusting mechanism, a temperature compensating mechanism, an angle adjusting mechanism and a grating, and is characterized in that the temperature compensating mechanism comprises a rectangular box, heating holes distributed equidistantly 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, 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, partition plates distributed equidistantly are fixedly connected to the outer wall of the bottom of the rectangular box, speed limiting plates are hinged to the outer wall of one side of each partition plate, the outer wall of the opposite side of each of the two speed limiting plates is fixedly connected with the same dustproof net, vertical rods distributed equidistantly are fixedly connected to the inner wall of the bottom of, and the outer wall of round bar has cup jointed spring two and ring respectively, the one end fixedly connected with fixed block of round bar, and the one end and the fixed block fixed connection of spring two, the other end and the ring fixed connection of spring two, and the outer wall of ring articulates there is the movable rod, the one end and the speed limit board of movable rod are articulated, and the top of round bar is provided with dust absorption mechanism.
2. The fiber bragg grating signal demodulating device as claimed in claim 1, wherein the dust absorption mechanism comprises a third spring, a rotating rod and a rotating shaft, the third spring is fixedly connected with the round rod, one end of the third spring is fixedly connected with a fur, the rotating shaft is connected with the outer wall of the top of the vertical rod through a bearing, the outer wall of the rotating shaft is sleeved with fan blades, the outer wall of the rotating shaft is fixedly connected with rubber rods distributed at equal intervals, and the rubber rods are in contact with the fur.
3. The fiber grating signal demodulation device according to claim 2, wherein 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 round ball, and the round ball is in contact with the dust screen.
4. The fiber bragg grating signal demodulating device as claimed in claim 1, wherein the pressure adjusting device comprises a lead screw, the direction of the screw thread of the lead screw is opposite from the middle to the two sides, a driven gear is sleeved in the middle of the outer wall of the lead screw, 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 and is meshed with the driven gear, two sliding blocks II are connected to the two sides of the outer wall of the lead screw through threads, two sliding rails II are arranged on the two sides of the inner wall of the bottom of the rectangular box, and the sliding blocks II and the sliding.
5. The fiber bragg grating signal demodulating device as claimed in claim 4, wherein an adjusting lever is fixedly connected to an outer wall of the top of the second sliding block, one end of the adjusting lever is hinged to the first sliding block, a fixing plate is fixedly connected to both sides of the outer wall of the top of the rectangular box, a supporting rod is fixedly connected to an outer wall of one side of the fixing plate, one end of the supporting rod is hinged to a connecting rod, a first sliding rail is arranged on an outer wall of one side of the connecting rod, and the first sliding rail and the first sliding block form a.
6. The fiber grating signal demodulating device according to claim 5, wherein a mounting hole is formed on an outer wall of one side of the fixing plate, a clamping rod is inserted into an inner wall of the mounting hole, one end of the clamping rod is hinged to one end of the connecting rod, a stop block is fixedly connected to an outer wall of the clamping rod, a first spring is fixedly connected to an outer wall of one side of the stop block, one end of the first spring is fixedly connected to the fixing plate, and a positioning plate is fixedly connected to the other end of the clamping rod.
7. The fiber grating signal demodulating device according to claim 1, wherein the angle adjusting mechanism includes a bottom case, and a rectangular groove is formed on an outer wall of a top portion of the bottom case, a rectangular plate is fixedly connected to both sides of the outer wall of the top portion of the bottom case, a rotating plate is rotatably connected to an outer wall of one side of the rectangular plate, and the outer wall of the top portion of the rotating plate is fixedly connected to an outer wall of the bottom portion of the rectangular case.
8. The fiber bragg grating signal demodulating device as claimed in claim 7, wherein an angle measuring plate is disposed inside the bottom case, a telescopic rod is fixedly connected to an inner wall of one side of the bottom case, a third sliding block is hinged to one end of a piston rod of the telescopic rod, a third sliding rail is disposed on an outer wall of one side of the rotating plate, and the third sliding rail is in sliding fit with the third sliding block.
9. A method for demodulating a wavelength according to a fiber grating signal according to any one of claims 1 to 8, comprising the steps of:
s1: the distance between 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 enable the clamping rod to move, 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 compressed or stretched, the grating pitch of the grating is adjusted, and the wavelength can be adjusted through the change of the grating pitch.
S3: the temperature compensation mechanism is started to heat the heating box, the air flow flows into the heating box by starting the air heater, the speed limiting plate can rotate upwards under the impact force action 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, a current limiting effect can be achieved on the air flow under the elastic action of the second spring, the air flow flowing out of each heating hole is enabled to be the same, the grating is uniformly heated, and the dust screen on the speed limiting plate can achieve a dust preventing effect on the air flow.
S4: the wind plate can drive the bull stick and rotate under the air current effect, and then makes the ball pat the dust screen, makes the dust on the dust screen clap, and the flabellum can rotate under the effect that meets high-speed air current, and then drives the rubber stick and rotate, and the rubber stick can produce static with the fur friction, adsorbs the dust, prevents that the dust from causing the jam to the dust screen.
S5: the telescopic link stretch out and draw back can make three edge slide rails removals of slider, and then can rotate the rotor plate around rectangular plate, according to the angulometer board, can be in order to carry out angle modulation to the grating, can adjust the wavelength according to the pivoted angle.
S6: the fiber grating demodulating device demodulates the driving signal through the demodulation data unit, transmits the driving signal to computer equipment for calculation, calculates an external strain signal, protects the grating through the temperature compensation mechanism, and improves the accuracy and precision of the fiber grating demodulating device.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908514A (en) * | 2023-07-17 | 2023-10-20 | 武汉邢仪新未来电力科技股份有限公司 | Current transformer acquisition device with optical fiber protection |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201359508Y (en) * | 2008-12-12 | 2009-12-09 | 中国地质调查局水文地质环境地质调查中心 | Grating experimental calibration working platform |
| CN210015300U (en) * | 2019-06-04 | 2020-02-04 | 北京全息微美云网络科技有限公司 | Display device for volume holographic grating |
| CN210278694U (en) * | 2019-04-18 | 2020-04-10 | 石家庄市卓越涂装设备制造有限公司 | Pressure-equalizing and speed-equalizing device for RCO equipment activated carbon box |
| CN111811616A (en) * | 2020-08-07 | 2020-10-23 | 四川泛华航空仪表电器有限公司 | Optical fiber liquid level sensor based on gas-liquid thermal conductivity differential measurement |
| CN112000204A (en) * | 2020-08-25 | 2020-11-27 | 江西财经大学 | Multimedia teaching device for statistics based on measurement |
-
2021
- 2021-02-01 CN CN202110136963.4A patent/CN113009617B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201359508Y (en) * | 2008-12-12 | 2009-12-09 | 中国地质调查局水文地质环境地质调查中心 | Grating experimental calibration working platform |
| CN210278694U (en) * | 2019-04-18 | 2020-04-10 | 石家庄市卓越涂装设备制造有限公司 | Pressure-equalizing and speed-equalizing device for RCO equipment activated carbon box |
| CN210015300U (en) * | 2019-06-04 | 2020-02-04 | 北京全息微美云网络科技有限公司 | Display device for volume holographic grating |
| CN111811616A (en) * | 2020-08-07 | 2020-10-23 | 四川泛华航空仪表电器有限公司 | Optical fiber liquid level sensor based on gas-liquid thermal conductivity differential measurement |
| CN112000204A (en) * | 2020-08-25 | 2020-11-27 | 江西财经大学 | Multimedia teaching device for statistics based on measurement |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116908514A (en) * | 2023-07-17 | 2023-10-20 | 武汉邢仪新未来电力科技股份有限公司 | Current transformer acquisition device with optical fiber protection |
| CN116908514B (en) * | 2023-07-17 | 2023-12-19 | 武汉邢仪新未来电力科技股份有限公司 | Current transformer acquisition device with optical fiber protection |
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