CN112254751A - Packaging device of fiber grating sensor - Google Patents
Packaging device of fiber grating sensor Download PDFInfo
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- CN112254751A CN112254751A CN202011079167.3A CN202011079167A CN112254751A CN 112254751 A CN112254751 A CN 112254751A CN 202011079167 A CN202011079167 A CN 202011079167A CN 112254751 A CN112254751 A CN 112254751A
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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
- G01D5/32—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 with attenuation or whole or partial obturation of beams of light
- G01D5/34—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/353—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre
- G01D5/35306—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement
- G01D5/35309—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer
- G01D5/35316—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 with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells influencing the transmission properties of an optical fibre using an interferometer arrangement using multiple waves interferometer using a Bragg gratings
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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
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/24—Housings ; Casings for instruments
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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
- G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
- G01D11/30—Supports specially adapted for an instrument; Supports specially adapted for a set of instruments
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Abstract
The invention relates to a packaging device of a fiber grating sensor, which is characterized in that: the device comprises a base and a workbench positioned on the base, wherein a through hole is formed in the middle of the workbench, and a lifting block is arranged in the through hole; the lower part of the lifting block is provided with a lifting mechanism; the two sides of the through hole of the workbench are provided with dies, the middle part of the die is provided with a cavity exposing the through hole, and the outer side of the die is provided with a clamping mechanism; the packaging device is also provided with a heating top cover and a mould taking tool; a first optical fiber supporting seat and a second optical fiber supporting seat are respectively arranged on two sides of the die; a transverse slideway is arranged on the workbench; the bottom of the workbench is provided with a driving assembly; and the first optical fiber supporting seat and the second optical fiber supporting seat are both provided with a wire clamp. The invention facilitates the high-quality packaging of the fiber grating sensor, and has good packaging effect and high packaging efficiency.
Description
Technical Field
The invention relates to the technical field of fiber grating sensor packaging equipment, in particular to a packaging device of a fiber grating sensor.
Background
With the vigorous development of the economy in China, a large number of infrastructures are continuously built, and large-scale structural components are widely applied to the fields of electric power, metallurgy, chemical engineering, petroleum, buildings and the like and play an extremely important role in national production activities. Many large structural members in active service in China are in service in severe natural environments and are subjected to influences of factors such as weathering and material aging for a long time, which forms a great challenge for long-term stable operation of the large structural members.
Therefore, by monitoring parameters such as strain and vibration of the key components of the large structural member, the problems of the large structural member in the operation process are found in time, each key component of the large structural member is maintained in advance, the safe operation of the large structural member is ensured, and the method has great significance for national production activities. By analyzing key monitoring parameters, the running condition of the large-scale structural part is known in time, the smooth and safe operation of the project is ensured, and higher requirements are provided for the sensing technology.
With the development of optical fiber communication technology, the optical fiber sensing technology has also advanced sufficiently, and various optical fiber grating sensors are emerging. The fiber grating sensor is widely used in various aspects of social life such as civil engineering, electric metallurgy, aerospace and the like due to the advantages of high measurement precision, wavelength coding, easiness in forming a distributed network and the like. By designing different packaging structures, the fiber grating can realize different physical parameter tests, such as strain, temperature, vibration, current and voltage, and the fiber grating also opens up a wide application space. The fiber grating sensor meets the requirements of low cost and high precision in the current monitoring market, becomes one of the fastest-developing technologies in the field of sensors due to the specific advantages of the fiber grating sensor, and has attracted extensive attention in the field of monitoring large-scale structures.
The fiber bragg grating is a novel passive optical device, the axial strain and temperature sensing sensitivity of the fiber bragg grating are high, but the bare fiber is hard and brittle, is easy to break and is easy to be interfered by the external environment change environment, so that certain treatment measures need to be taken for the bare fiber, namely the bare fiber is packaged, and the fiber bragg grating is better suitable for the monitoring needs of actual engineering.
In general, the outer diameter of a common single-mode optical fiber is 125 μm, the main constituent material of the single-mode optical fiber is SiO2, and the structure of the single-mode optical fiber is a fiber core, a cladding and a coating layer from inside to outside in sequence. When the FBG is manufactured, the coating layer needs to be removed, and then the FBG is exposed by ultraviolet laser, at this time, the gate region is particularly fragile and easy to break, which brings great challenges to the practicability of the fiber grating sensor. In the application of actual engineering, the FBG sensor still can receive the influence that comes from external environment, like collision, vibration, moisture erosion etc. these factors all can cause harmful effects to FBG strain transducer's measurement, lead to the measuring result inaccurate, some sensors are destroyed even, consequently must carry out necessary protective packaging to the FBG sensor, just can make the FBG sensor be applicable to the adverse circumstances of large-scale engineering monitoring.
During the sensing test, some FBG sensors are influenced by the external environment, and the Bragg center wavelength is shifted due to temperature and strain, so that some special packaging methods are required to eliminate the wavelength shift caused by the measurement environment change. The strain and temperature sensitivity of the bare fiber grating is low, and the fiber grating needs to be sensitized and packaged at this time in order to facilitate the demodulation of wavelength signals. In some cases, it is desirable that the external parameters have less influence on the central wavelength of the fiber grating, i.e. the test precision is improved, or the test range is enlarged. At this time, the fiber grating needs to be desensitized and packaged, so that the sensitivity of the fiber grating to external parameters is reduced. The two technologies are collectively called as sensitization technologies of fiber gratings, and the current sensitization technologies are widely applied.
The problem of temperature and strain cross sensitivity is another difficult problem to be solved in engineering. Temperature and strain can cause the central wavelength of the grating to drift, and the reason for the wavelength drift is difficult to distinguish whether the wavelength drift is caused by temperature change or external stress change by simply analyzing the change of the central wavelength. To put the fiber grating into practical use, it is necessary to use a certain packaging technique to distinguish the amount of wavelength drift due to temperature and strain. Therefore, the strain measuring device can not be interfered by external temperature change when measuring the strain, and can also not be interfered by external strain when measuring the temperature.
In the application of the actual large-scale structure health monitoring engineering, different packaging modes are adopted to carry out necessary packaging processing on the fiber bragg grating sensor according to engineering requirements, and the quality of the packaging technology directly relates to the test performance and the service life of the FBG sensor, so that different packaging structures are designed, and the influence of different packaging structures on the performance of the fiber bragg grating is particularly important in the application of the actual engineering.
At present, most of fiber grating sensors are packaged and fixed by epoxy resin glue and the like, and the main packaging modes include substrate type packaging, embedded type packaging, metal tube packaging and the like. In the packaging process, a certain prestress is often required to be applied to the fiber bragg grating, so that the chirp phenomenon is avoided, and the stability and good repeatability of the sensor are facilitated. For the embedded package or the package of the surface-adhered fiber bragg grating, the distance between the fiber bragg grating and the surface of a measured object, namely the distance between the intermediate layers influences the transmission efficiency of the measured physical quantity, and the method has very important significance for effectively controlling the performance of the thickness sensor of the intermediate layers. In addition, the high-performance curing adhesive is mostly required to be cured at a certain temperature, and the condition of uneven internal stress cured at normal temperature can be eliminated by heating and curing, so that the packaged fiber grating sensor has better linearity; meanwhile, as the colloid and the optical fiber are subjected to heat treatment, the temperature stability of the fiber grating sensor can be kept stable in the using process.
Research shows that in the process of packaging by adopting an adhesive at the present stage, the existing packaging operation device is used for packaging the fiber bragg grating sensor; because in the packaging process; the difference between the relaxation state and the straight line state of the fiber grating sensor is short, or the sizes of the sensors are not uniform, so that the sensitivity difference after packaging is large; the number of packaging defective products is large; it is therefore desirable to develop a packaging device that effectively addresses such problems.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a packaging device of a fiber grating sensor with good packaging effect.
The technical scheme of the invention is realized as follows: the packaging device of a fiber grating sensor is characterized in that: the device comprises a base and a workbench positioned on the base, wherein a through hole is formed in the middle of the workbench, and a lifting block used for adjusting the thickness of the middle layer of the fiber grating sensor is arranged in the through hole; the lower part of the lifting block is provided with a lifting mechanism for controlling the lifting block to lift; the two sides of the through hole of the workbench are provided with dies for clamping the optical fiber, the middle part of the die is provided with a cavity exposed out of the through hole, and the outer side of the die is provided with a clamping mechanism; the packaging device is also provided with a heating top cover used for covering the workbench, and a mould taking tool used for taking out the fiber grating sensor and the mould after the packaging is finished;
a first optical fiber supporting seat and a second optical fiber supporting seat are respectively arranged on two sides of the die; a transverse slideway is arranged on the workbench; the bottom of the workbench is provided with a driving assembly which is used for driving the first optical fiber supporting seat and the second optical fiber supporting seat to slide in the transverse slide way; and the first optical fiber supporting seat and the second optical fiber supporting seat are both provided with a wire clamp.
Preferably: the driving assembly comprises a mounting plate, a power driving mechanism, a driving mechanism and a driven driving mechanism, wherein the mounting plate is mounted at the bottom of the workbench; a first sliding rail is arranged on the mounting plate; the driving mechanism and the driven driving mechanism are arranged on the first sliding track in a sliding mode; the power driving mechanism is fixedly arranged on the mounting plate, and the output end of the power driving mechanism is fixedly connected with the active driving mechanism and is used for controlling the active driving mechanism to slide on the first sliding track; the power driving mechanism slides on the first sliding track through the transmission mechanism and the driving driven driving mechanism.
Preferably: the driving mechanism comprises a first sliding seat, a first sliding plate and a first sliding claw which are arranged on the first sliding track in a sliding mode; the back surface of the first sliding plate is fixedly connected with the first sliding seat; the first sliding claw is fixedly arranged on the front surface of the first sliding plate and is fixedly connected with the first optical fiber supporting seat through a bolt;
the driven driving mechanism comprises a second sliding seat, a second sliding plate and a second sliding claw which are arranged on the first sliding track in a sliding mode; the back surface of the second sliding plate is fixedly connected with the second sliding seat; the second sliding claw is fixedly arranged on the front surface of the second sliding plate and is fixedly connected with the second optical fiber supporting seat through a bolt;
the transmission mechanism comprises a second sliding track, a third sliding seat, a third sliding plate, a stretching sliding block, a lower sliding rack, an upper sliding rack and a transmission gear, wherein the second sliding track, the third sliding seat, the third sliding plate, the stretching sliding block, the lower sliding rack, the upper sliding rack and the transmission gear are arranged under the first sliding track and are fixedly connected with the mounting plate; the third sliding seat is arranged on the second sliding rail in a sliding manner; the back surface of the third sliding plate is fixedly connected with the third sliding seat; the side surface of the stretching sliding block is fixedly arranged on the third sliding plate; the lower sliding rack is arranged on the upper end surface of the stretching sliding block; the upper sliding rack is fixedly arranged right below the second sliding plate; the transmission gear is fixedly arranged on the mounting plate through a rotating rod; the transmission gear is rotationally connected with the rotating rod; and simultaneously engages with the lower sliding rack and the upper sliding rack.
Preferably: the power driving mechanism comprises a driving cylinder, a mounting seat and a connecting seat; the driving cylinder is arranged on the mounting plate through the mounting seat; the output end of the driving air cylinder is fixedly connected with the first sliding plate and/or the first sliding seat through the connecting seat.
Preferably: the device also comprises a displacement detection device; the displacement detection device comprises a photoelectric transmitting and receiving device, at least one reflecting device and a data receiving panel; the photoelectric transmitting and receiving device comprises a main control unit, at least one laser and at least one position sensitive element, wherein the main control unit is electrically connected with the data receiving panel; wherein the number of the reflecting devices, the number of the lasers and the number of the position sensitive elements are equal; each reflecting device corresponds to one laser and one position sensitive element;
the laser and the sensitive element are both arranged on one end face of the second sliding plate facing the first sliding plate; the main control unit is arranged on the mounting plate; the data receiving panel is arranged on the base through the mounting bracket; the reflecting device comprises a right-angle prism which is arranged on one end face, facing the second sliding plate, of the first sliding plate;
the laser is configured to enable the laser emitted by the laser to irradiate the right-angle prism corresponding to the laser, the position sensitive element is installed to be capable of receiving the laser reflected by the right-angle prism corresponding to the laser, and the main control circuit is configured to control the emission of the laser, receive a displacement signal from the position sensitive element and process the displacement signal to generate a displacement detection result of the right-angle prism relative to the photoelectric emission and receiving device;
the right-angle prism is mounted with its hypotenuse in the direction in which the displacement is to be detected.
Preferably: the mold is formed by flattening two concave mold pieces with symmetrical structures, a transverse optical fiber groove is formed in the middle of each concave mold piece, and a wedge-shaped hole is formed in the top of each concave mold piece; the concave parts of the two concave mould pieces form the cavity, the transverse optical fiber grooves of the two concave mould pieces form an optical fiber through hole for an optical fiber to pass through, and the wedge-shaped holes of the two concave mould pieces are matched with the mould taking tool.
Preferably: the mould taking tool comprises a movable pressing plate and a fixed pressing plate which are arranged from top to bottom, and a wedge-shaped rod which penetrates through the fixed pressing plate and is fixedly connected with the movable pressing plate, a spring is sleeved on the wedge-shaped rod between the movable pressing plate and the fixed pressing plate, and the shape of the bottom of the wedge-shaped rod is matched with the wedge-shaped holes of the two concave mould pieces.
Preferably: the lifting mechanism comprises an adjusting rod, a driving bevel gear, a driven bevel gear and a lifting screw rod which are connected in sequence, wherein the tail end of the lifting screw rod is connected with the bottom of the lifting block; the adjusting rod extends out of the side direction of the base.
Preferably: the clamping mechanism comprises two sliding blocks arranged on the workbench, the bottoms of the sliding blocks are connected with clamping springs, and the clamping springs are sleeved in the guide rods; the worktable is provided with a groove body which is vertical to the through hole, and the guide rod and the clamping spring are arranged in the groove body; and the two ends of the guide rod are fixedly connected with the workbench.
Preferably: the heating top cover comprises a cover body hinged with the workbench; and a resistance wire and a temperature sensor are arranged in the cover body.
Compared with the prior art, the invention has the following beneficial effects:
1. the thickness of the middle layer is controlled by adopting the lifting block, the mould with the cavity is matched with the heating top cover, the heating is uniform and constant, the size of the packaging material is constant, and the sensor packaged by the device has uniform size and shape, so that the packaging of the fiber grating sensor is more standard and more standard; the manufactured sensor and the object to be measured are mutually independent, and the sensor is recycled; the sensor can be used after being calibrated, so that the use precision is improved;
2. by arranging the driving component, the two optical fibers sensed by the fiber bragg grating can be straightened outwards by the driving component from two ends in the process of packaging the fiber bragg grating sensor, so that the phenomenon that the fiber bragg grating sensor is bent and loosed to pull the crotch in the packaging process is avoided; the packaging quality of the fiber bragg grating sensor is improved; and ensuring that the sensitivity deviation of the fiber bragg grating sensor is within a qualified quality interval.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a female mold piece;
FIG. 3 is a schematic structural diagram of a mold removal tool;
FIG. 4 is a schematic structural view of the lifting mechanism;
FIG. 5 is a schematic view of the clamping mechanism;
FIG. 6 is a schematic view of the overall structure of the driving assembly;
FIG. 7 is a schematic diagram of a specific structure of a driving assembly;
FIG. 8 is a schematic structural view of a power drive mechanism;
fig. 9 is a schematic structural diagram of the displacement detecting device.
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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 5, the present invention discloses a package device of a fiber grating sensor, which in the specific embodiment of the present invention comprises a base 1 and a workbench 2 located on the base 1, wherein the base 1 is provided with a transverse through channel 11 along a length direction; a through hole is formed in the middle of the workbench 2, and a lifting block 3 for adjusting the thickness of the middle layer of the fiber grating sensor is arranged in the through hole; the lower part of the lifting block 3 is provided with a lifting mechanism 4 for controlling the lifting block 3 to lift; the two sides of the through hole of the workbench 2 are provided with molds 5 for clamping the optical fiber, the middle part of the mold 5 is provided with a cavity exposed out of the through hole, and the outer side of the mold 5 is provided with a clamping mechanism 6; the packaging device is also provided with a heating top cover 7 for covering the workbench 2 and a mould taking tool 8 for taking out the fiber grating sensor and the mould 5 after the packaging is finished;
a first optical fiber support seat 100 and a second optical fiber support seat 200 are respectively arranged on two sides of the mold 5; a transverse slideway 21 is arranged on the workbench 2; the bottom of the workbench 2 is provided with a driving component 9 which is used for driving the first optical fiber support seat 100 and the second optical fiber support seat 200 to slide in the transverse slide way 21; the first fiber support base 100 and the second fiber support base 200 are both provided with a wire guide clamp.
In the specific embodiment of the invention, the mold 5 is formed by flattening two concave mold pieces 51 with symmetrical structures, a transverse optical fiber groove 52 is arranged in the middle of the concave mold piece 51, and a wedge-shaped hole 53 is arranged at the top of the concave mold piece 51; the concave parts of the two concave mould pieces 51 form the cavity, the transverse optical fiber grooves 52 of the two concave mould pieces 51 form an optical fiber through hole for the optical fiber to pass through, and the wedge-shaped holes 53 of the two concave mould pieces 51 are matched with the mould taking tool 8.
In the specific embodiment of the present invention, the mold removing tool 8 includes a movable platen 81 and a fixed platen 82 which are arranged up and down, and a wedge-shaped rod 83 which penetrates through the fixed platen 82 and is fixedly connected with the movable platen 81, a spring 84 is sleeved on the wedge-shaped rod 83 between the movable platen 81 and the fixed platen 82, and the shape of the bottom of the wedge-shaped rod 83 is matched with the wedge-shaped holes 53 of the two concave mold pieces 51.
In the embodiment of the present invention, the lifting mechanism 4 comprises an adjusting rod 41, a driving bevel gear 42, a driven bevel gear 43 and a lifting screw 44 which are connected in sequence, wherein the tail end of the lifting screw 44 is connected with the bottom of the lifting block 3; the adjusting rod 41 extends laterally from the base 1.
In the specific embodiment of the present invention, the clamping mechanism 6 includes two sliding blocks 61 disposed on the worktable 2, the bottom of the sliding blocks 61 is connected with a clamping spring 62, and the clamping spring 62 is sleeved in a guide rod 63; a groove body 64 which is vertical to the through hole is arranged on the workbench 2, and the guide rod 63 and the clamping spring 62 are arranged in the groove body 64; and both ends of the guide rod 63 are fixedly connected with the workbench 2; in this embodiment, the rear end of the guide rod 63 is fixed to the tank body, and the front end of the guide rod 63 is fixed to the top of the front support block 1 through the baffle plate 64 and the baffle plate fixing device 65.
In the present embodiment, the heating top cover 7 comprises a cover body 71 hinged to the worktable; a resistance wire 72 and a temperature sensor 73 are arranged in the cover body 71.
Compared with the prior art, the invention has the following beneficial effects: the sensor has the characteristics of simple mechanical structure, small volume, easy operation and the like, and can be cured at high temperature under the condition of loading prestress in the packaging process, so that the chirp phenomenon of the sensor is avoided. The structure and the size of the fiber grating sensor can be strictly controlled by utilizing the die for packaging, the linearity and the thermal stability in a measuring range are ensured, meanwhile, the packaged fiber grating is an independent sensor and can be used after being calibrated, more accurate measuring precision is achieved, and in addition, the fiber grating sensor can be fixed on the surface of a measured body in a manner of strong instant glue and the like, so that the possibility is provided for the reutilization of the fiber grating sensor.
Example 2 differs from example 1 in that
As shown in fig. 6-8, in the embodiment of the present invention, the driving assembly 9 includes a mounting plate 91 mounted on the side wall of the transverse through channel 11 at the bottom of the working table 2, a power driving mechanism 92, a driving mechanism 93 and a driven driving mechanism 94; a first sliding rail 911 is mounted on the mounting plate 91; the driving mechanism 93 and the driven driving mechanism 94 are both arranged on the first sliding track 911 in a sliding manner; the power driving mechanism 92 is fixedly mounted on the mounting plate 91, and an output end of the power driving mechanism 92 is fixedly connected with the active driving mechanism 93 and is used for controlling the active driving mechanism 93 to slide on the first sliding track 911; the power driving mechanism 92 slides on the first sliding rail 911 via the transmission mechanism 95 and the driving driven driving mechanism 94.
In the present embodiment, the active driving mechanism 93 includes a first sliding seat 931, a first sliding plate 932, and a first sliding claw 933 slidably disposed on the first sliding rail 911; the back surface of the first sliding plate 932 is fixedly connected with the first sliding seat 931; the first sliding claw 933 is fixedly installed on the front surface of the first sliding plate 932 and is fixedly connected with the first optical fiber support seat 100 through a bolt;
the driven driving mechanism 94 includes a second sliding base 941, a second sliding plate 942, and second sliding pawls 943 slidably disposed on the first sliding rail 911; the back surface of the second sliding plate 942 is fixedly connected to the second sliding seat 941; the second sliding pawl 943 is fixedly mounted on the front surface of the second sliding plate 942 and is fixedly connected to the second fiber support base 200 by a bolt;
the transmission mechanism 95 comprises a second sliding track 912, a third sliding seat 951, a third sliding plate 952, a stretching slider 953, a lower sliding rack 954, an upper sliding rack 955 and a transmission gear 956 which are arranged right below the first sliding track 911 and fixedly connected with the mounting plate 91; the third sliding seat 951 is slidably arranged on the second sliding track 912; the back surface of the third sliding plate 952 is fixedly connected with a third sliding seat 951; the side surface of the tension slider 953 is fixedly mounted on the third slide plate 952; the lower sliding rack 954 is mounted on the upper end surface of the tension slider 953; the upper sliding rack 955 is fixedly installed right below the second sliding plate 942; the transmission gear 956 is fixedly installed on the installation plate 91 through a rotating rod; the transmission gear 956 is rotatably connected to the rotating lever; and simultaneously engages the lower and upper sliding racks 954 and 955.
In the embodiment of the present invention, the power driving mechanism 92 includes a driving cylinder 921, a mounting seat 922 and a connecting seat 923; the driving cylinder 921 is mounted on the mounting plate 91 through the mounting seat 922; the output end of the driving cylinder 921 is fixedly connected 932 with the first sliding plate via the connecting base 923.
Compared with the prior art, the invention has the following beneficial effects:
1. by arranging the driving component, the two optical fibers sensed by the fiber bragg grating can be straightened outwards by the driving component from two ends in the process of packaging the fiber bragg grating sensor, so that the phenomenon that the fiber bragg grating sensor is bent and loosed to pull the crotch in the packaging process is avoided; the packaging quality of the fiber bragg grating sensor is improved; ensuring that the sensitivity deviation of the fiber bragg grating sensor is within a qualified quality interval;
it should be noted that:
the working principle of the driving assembly is as follows: when the optical fiber grating sensor needs to be packaged, the stroke of the driving cylinder is set in advance according to the length size of the optical fiber grating sensor needing to be packaged, and then the optical fiber grating sensor needing to be packaged is used; the optical fiber guide device is arranged in an optical fiber through hole on a mold, and two ends of the optical fiber guide device are clamped by a guide wire clamp on a first optical fiber supporting seat and a second optical fiber supporting seat; straightening the optical fiber according to a preset size;
in the process, the air cylinder is driven singly, and a gear (the upper sliding rack and the lower sliding rack have the same tooth number and the same tooth space and are driven by the same gear, so that the running speed and the displacement of the driven driving mechanism are the same as those of the driving mechanism) is used for driving, so that the first optical fiber supporting seat and the second optical fiber supporting seat are both centered on the optical fiber packaging area in the running process and pulled towards two sides, and the mode ensures that the optical fiber grating packaging area cannot deviate from a mold. The packaging quality is further improved.
Example 3 differs from example 2 in that
As shown in fig. 9, in the embodiment of the present invention, a displacement detecting device 10 is further included; the displacement detection device comprises a photoelectric transmitting and receiving device 101, at least one reflecting device 102 and a data receiving panel 103; the optoelectronic transmitting and receiving device 101 comprises a main control unit 104 electrically connected with a data receiving panel 103, at least one laser 105, and at least one position sensitive element 106; wherein the number of the reflecting devices 102, the lasers 105 and the position sensitive elements 106 is equal; and each reflecting device 102 corresponds to one laser 105 and one position sensitive element 106;
the laser 105 and the sensor 106 are both mounted on the second slider plate 942 facing an end face of the first slider plate 932; the main control unit 104 is mounted on the mounting plate 91; the data receiving panel 103 is mounted on the base 1 through a mounting bracket 107; the reflecting means 102 comprises a right-angle prism mounted on an end surface of the first sliding plate 932 facing the second sliding plate 942;
the laser is configured to enable the laser emitted by the laser to irradiate the right-angle prism corresponding to the laser, the position sensitive element is installed to be capable of receiving the laser reflected by the right-angle prism corresponding to the laser, and the main control circuit is configured to control the emission of the laser, receive a displacement signal from the position sensitive element and process the displacement signal to generate a displacement detection result of the right-angle prism relative to the photoelectric emission and receiving device;
the right-angle prism is mounted with its hypotenuse in the direction in which the displacement is to be detected.
Compared with the prior art, the invention has the following beneficial effects:
by adopting the displacement detection device, the purpose of detecting the relative displacement between the first optical fiber support seat and the second optical fiber support seat can be effectively achieved;
and is fed back to a data receiving panel which can be observed and operated by a worker; the staff can determine whether the optical fiber is straightened according to the displacement on the receipt receiving panel and the comparison with the original optical fiber length, and control the work of the driving air cylinder based on the data, so that the optical fiber is better ensured to be at the most suitable elongation, and the packaging quality of the fiber grating sensor is further improved; and ensuring that the sensitivity deviation of the fiber bragg grating sensor is within a qualified quality interval.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The packaging device of a fiber grating sensor is characterized in that: the device comprises a base and a workbench positioned on the base, wherein a through hole is formed in the middle of the workbench, and a lifting block used for adjusting the thickness of the middle layer of the fiber grating sensor is arranged in the through hole; the lower part of the lifting block is provided with a lifting mechanism for controlling the lifting block to lift; the two sides of the through hole of the workbench are provided with dies for clamping the optical fiber, the middle part of the die is provided with a cavity exposed out of the through hole, and the outer side of the die is provided with a clamping mechanism; the packaging device is also provided with a heating top cover used for covering the workbench, and a mould taking tool used for taking out the fiber grating sensor and the mould after the packaging is finished;
a first optical fiber supporting seat and a second optical fiber supporting seat are respectively arranged on two sides of the die; a transverse slideway is arranged on the workbench; the bottom of the workbench is provided with a driving assembly which is used for driving the first optical fiber supporting seat and the second optical fiber supporting seat to slide in the transverse slide way; and the first optical fiber supporting seat and the second optical fiber supporting seat are both provided with a wire clamp.
2. The package for fiber grating sensor according to claim 1, wherein: the driving assembly comprises a mounting plate, a power driving mechanism, a driving mechanism and a driven driving mechanism, wherein the mounting plate is mounted at the bottom of the workbench; a first sliding rail is arranged on the mounting plate; the driving mechanism and the driven driving mechanism are arranged on the first sliding track in a sliding mode; the power driving mechanism is fixedly arranged on the mounting plate, and the output end of the power driving mechanism is fixedly connected with the active driving mechanism and is used for controlling the active driving mechanism to slide on the first sliding track; the power driving mechanism slides on the first sliding track through the transmission mechanism and the driving driven driving mechanism.
3. The package for fiber grating sensor according to claim 2, wherein: the driving mechanism comprises a first sliding seat, a first sliding plate and a first sliding claw which are arranged on the first sliding track in a sliding mode; the back surface of the first sliding plate is fixedly connected with the first sliding seat; the first sliding claw is fixedly arranged on the front surface of the first sliding plate and is fixedly connected with the first optical fiber supporting seat through a bolt;
the driven driving mechanism comprises a second sliding seat, a second sliding plate and a second sliding claw which are arranged on the first sliding track in a sliding mode; the back surface of the second sliding plate is fixedly connected with the second sliding seat; the second sliding claw is fixedly arranged on the front surface of the second sliding plate and is fixedly connected with the second optical fiber supporting seat through a bolt;
the transmission mechanism comprises a second sliding track, a third sliding seat, a third sliding plate, a stretching sliding block, a lower sliding rack, an upper sliding rack and a transmission gear, wherein the second sliding track, the third sliding seat, the third sliding plate, the stretching sliding block, the lower sliding rack, the upper sliding rack and the transmission gear are arranged under the first sliding track and are fixedly connected with the mounting plate; the third sliding seat is arranged on the second sliding rail in a sliding manner; the back surface of the third sliding plate is fixedly connected with the third sliding seat; the side surface of the stretching sliding block is fixedly arranged on the third sliding plate; the lower sliding rack is arranged on the upper end surface of the stretching sliding block; the upper sliding rack is fixedly arranged right below the second sliding plate; the transmission gear is fixedly arranged on the mounting plate through a rotating rod; the transmission gear is rotationally connected with the rotating rod; and simultaneously engages with the lower sliding rack and the upper sliding rack.
4. The package for fiber grating sensor according to claim 3, wherein: the power driving mechanism comprises a driving cylinder, a mounting seat and a connecting seat; the driving cylinder is arranged on the mounting plate through the mounting seat; the output end of the driving air cylinder is fixedly connected with the first sliding plate and/or the first sliding seat through the connecting seat.
5. The package for fiber grating sensor according to claim 4, wherein: the device also comprises a displacement detection device; the displacement detection device comprises a photoelectric transmitting and receiving device, at least one reflecting device and a data receiving panel; the photoelectric transmitting and receiving device comprises a main control unit, at least one laser and at least one position sensitive element, wherein the main control unit is electrically connected with the data receiving panel; wherein the number of the reflecting devices, the number of the lasers and the number of the position sensitive elements are equal; each reflecting device corresponds to one laser and one position sensitive element;
the laser and the sensitive element are both arranged on one end face of the second sliding plate facing the first sliding plate; the main control unit is arranged on the mounting plate; the data receiving panel is arranged on the base through the mounting bracket; the reflecting device comprises a right-angle prism which is arranged on one end face, facing the second sliding plate, of the first sliding plate;
the laser is configured to enable the laser emitted by the laser to irradiate the right-angle prism corresponding to the laser, the position sensitive element is installed to be capable of receiving the laser reflected by the right-angle prism corresponding to the laser, and the main control circuit is configured to control the emission of the laser, receive a displacement signal from the position sensitive element and process the displacement signal to generate a displacement detection result of the right-angle prism relative to the photoelectric emission and receiving device;
the right-angle prism is mounted with its hypotenuse in the direction in which the displacement is to be detected.
6. The package for fiber grating sensor according to claim 5, wherein: the mold is formed by flattening two concave mold pieces with symmetrical structures, a transverse optical fiber groove is formed in the middle of each concave mold piece, and a wedge-shaped hole is formed in the top of each concave mold piece; the concave parts of the two concave mould pieces form the cavity, the transverse optical fiber grooves of the two concave mould pieces form an optical fiber through hole for an optical fiber to pass through, and the wedge-shaped holes of the two concave mould pieces are matched with the mould taking tool.
7. The package for fiber grating sensor according to claim 6, wherein: the mould taking tool comprises a movable pressing plate and a fixed pressing plate which are arranged from top to bottom, and a wedge-shaped rod which penetrates through the fixed pressing plate and is fixedly connected with the movable pressing plate, a spring is sleeved on the wedge-shaped rod between the movable pressing plate and the fixed pressing plate, and the shape of the bottom of the wedge-shaped rod is matched with the wedge-shaped holes of the two concave mould pieces.
8. The package for fiber grating sensor according to claim 7, wherein: the lifting mechanism comprises an adjusting rod, a driving bevel gear, a driven bevel gear and a lifting screw rod which are connected in sequence, wherein the tail end of the lifting screw rod is connected with the bottom of the lifting block; the adjusting rod extends out of the side direction of the base.
9. The package for fiber grating sensor according to claim 8, wherein: the clamping mechanism comprises two sliding blocks arranged on the workbench, the bottoms of the sliding blocks are connected with clamping springs, and the clamping springs are sleeved in the guide rods; the worktable is provided with a groove body which is vertical to the through hole, and the guide rod and the clamping spring are arranged in the groove body; and the two ends of the guide rod are fixedly connected with the workbench.
10. The package for fiber grating sensor according to claim 9, wherein: the heating top cover comprises a cover body hinged with the workbench; and a resistance wire and a temperature sensor are arranged in the cover body.
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| CN202011079167.3A CN112254751A (en) | 2020-10-10 | 2020-10-10 | Packaging device of fiber grating sensor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011079167.3A CN112254751A (en) | 2020-10-10 | 2020-10-10 | Packaging device of fiber grating sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118654712A (en) * | 2024-08-21 | 2024-09-17 | 西北工业大学 | High-temperature optical fiber F-P cavity MEMS sensor packaging device and thermal stress isolation packaging method thereof |
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Application publication date: 20210122 |