Preparation device and method for miniature optical fiber gap sensor

Abstract

The invention belongs to the technical field of optical fiber sensors, and discloses a preparation device for a miniature optical fiber gap sensor, which comprises a machine table, and the machine table is provided with a height visual guiding mechanism, a left bare fiber adjusting mechanism, a right bare fiber adjusting mechanism, a visual monitoring mechanism and a horizontal visual guiding mechanism. The invention discloses a preparation method for a miniature optical fiber gap sensor, and the preparation method comprises the following preparation steps: S1, starting up; s2, fixing a probe bracket; s3, positioning a probe bracket; s4, optical fiber positioning; s5, performing optical fiber collimation; s6, micro-control dispensing is carried out; and S7, ending. By using the device and the method provided by the invention, precise installation of the probe bracket and the bare fiber probe can be completed.

Description

Technical Field

[0001] The invention belongs to the technical field of optical fiber sensors, and in particular relates to a preparation device and a method for a micro optical fiber gap sensor. Background Art

[0002] A micro-fiber gap sensor is a type of fiber optic sensor. It uses optical fiber as a transmission medium and measures the gap or distance by detecting changes in optical signals. This type of sensor is usually based on optical modulation technology, that is, the physical quantity to be measured (such as gap size) will cause changes in the parameters of the light wave transmitted in the optical fiber (such as light intensity, frequency, wavelength, etc.). By detecting changes in these light wave parameters, the size of the gap or distance can be indirectly measured. The micro-fiber gap sensor has the characteristics of small size, light weight, and high measurement accuracy. It is not affected by electromagnetic interference and is suitable for use in complex environments. Due to the flexibility of optical fiber, this type of sensor can be used for measurements in narrow spaces or on surfaces of complex shapes. Micro-fiber gap sensors are widely used in industrial automation, robotics, precision measurement and other fields.

[0003] The probe holder and bare fiber probe each play an important role in the optical fiber sensor. The probe holder provides stable support and protection for the bare fiber probe, while the bare fiber probe is responsible for sensing and transmitting optical signals. The two work together to ensure the normal operation and high-precision measurement of the optical fiber sensor.

[0004] Because the installation position and size of the probe holder and the diameter of the bare fiber probe are small (the installation slot of the probe holder is 0.05mm deep, the slot width is about 0.09mm, and the diameter of the miniature bare fiber probe is 0.08mm), the connection between the two becomes difficult, and angle and position errors are prone to occur. Improper connection between the probe holder and the bare fiber probe includes but is not limited to the following serious problems:

[0005] 1. Fiber damage:

[0006] If the optical fiber is excessively bent, pulled, or the tail wire is directly pulled during the connection process, since the optical fiber itself is a fragile component, these improper operations may cause the optical fiber to break, that is, "fiber breakage."

[0007] 2. Connection failure:

[0008] Improper connection operations may cause contaminants (such as dust, residues on cutting tools, etc.) to enter the interior of the optical fiber connector, which are difficult to remove after contact with the bonding gel, thus causing the optical fiber connector to be scrapped.

[0009] Therefore, how to ensure that the bare fiber probe can be stably and accurately fixed on the bracket and maintain good working performance is a technical issue that needs to be continuously optimized. Summary of the invention

[0010] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a preparation device and method for a micro optical fiber gap sensor.

[0011] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0012] A preparation device for a micro optical fiber gap sensor comprises a machine platform, on which a height visual guide mechanism, a left bare fiber adjustment mechanism, a right bare fiber adjustment mechanism, a visual monitoring mechanism and a horizontal visual guide mechanism are installed, the left bare fiber adjustment mechanism and the right bare fiber adjustment mechanism are installed relatively, the height visual guide mechanism, the visual monitoring mechanism and the horizontal visual guide mechanism are located at the front side, the back side and the rear side of the right bare fiber adjustment mechanism, the machine platform is installed with a probe holder vacuum adsorption tooling, the probe holder vacuum adsorption tooling is located between the height visual guide mechanism, the left bare fiber adjustment mechanism, the right bare fiber adjustment mechanism, the visual monitoring mechanism and the horizontal visual guide mechanism, the height visual guide mechanism, the left bare fiber adjustment mechanism, the right bare fiber adjustment mechanism, the visual monitoring mechanism, the horizontal visual guide mechanism and the probe holder vacuum adsorption tooling are electrically connected to an operation display panel;

[0013] The height vision guide mechanism comprises a slide rail mounted on the machine platform, the slide rail is slidably mounted with a height vision guide seat, the height vision guide seat is mounted with a locking head, and the height vision guide seat is mounted with a height vision guide module;

[0014] The left bare fiber adjustment mechanism and the right bare fiber adjustment mechanism have the same structure;

[0015] The left bare fiber adjustment mechanism comprises a base, the base is equipped with a three-axis adjustment platform, and the three-axis adjustment platform is equipped with a bare fiber rotation fixture;

[0016] The visual monitoring mechanism comprises a support, the support is equipped with a rotating bracket, and the rotating bracket is equipped with a 45° inclined visual monitoring module;

[0017] The horizontal visual guidance mechanism comprises a displacement adjustment platform, the displacement adjustment platform is equipped with a displacement frame, the displacement frame is L-shaped, the displacement frame is equipped with a horizontal visual guidance module, the output end of the horizontal visual guidance module corresponds to the top of the probe bracket vacuum adsorption tooling, the displacement frame is equipped with a rotating clamping table, and the rotating clamping table is equipped with a microinjection instrument;

[0018] The probe bracket vacuum adsorption tooling comprises a rotating motor installed on the machine platform, a bracket is installed at the output end of the rotating motor, the axis of the bracket is perpendicular to the horizontal plane of the machine platform, an adsorption platform is fixedly installed at the upper end of the bracket, the adsorption platform is provided with an adsorption head and an adsorption hole, the adsorption head is connected to the adsorption hole, and the suction end of the adsorption head is connected to a vacuum pump through a pipeline;

[0019] A method for preparing a micro optical fiber gap sensor comprises the following steps:

[0020] S1, power on;

[0021] Start the operation display panel;

[0022] S2, fixed probe bracket;

[0023] S2.1. Place the probe holder on the adsorption hole and ensure that the probe holder completely covers the adsorption hole;

[0024] S2.2, controlling the probe bracket vacuum adsorption tooling on the operation display panel to fix the probe bracket;

[0025] S3, positioning of probe bracket;

[0026] S3.1. Set parameters on the operation display panel, check the height positioning line, cooperate with the data fed back by the height visual guidance mechanism on the operation display panel, observe and confirm the aligned height position reference standard line;

[0027] S3.2. After the parameter requirements are met, the position of the vacuum adsorption tooling of the probe bracket is stopped;

[0028] S4, optical fiber positioning;

[0029] S4.1. Manually install the optical fiber line on the left bare fiber adjustment mechanism and the right bare fiber adjustment mechanism;

[0030] S4.2, operate on the operation display panel, wait for the translation stage to move automatically, and confirm whether the optical fiber line is separated on both sides of the edge of the workpiece in the image, and adjust it by moving the X-axis of the corresponding translation stage;

[0031] S4.3. Confirm whether the horizontal and vertical angles of the left and right optical fibers are both less than 0.02. If not, calibrate them with the bare fiber rotating fixture;

[0032] S5, optical fiber alignment;

[0033] S5.1. Determine the length parameter of the optical fiber extending into the probe bracket on the operation display panel;

[0034] S5.2, waiting for the system to control the automatic movement of each mechanism to complete;

[0035] S6, micro-controlled dispensing;

[0036] The system controls the microinjector to move to a set position and start applying glue to the optical fibers on the left and right sides;

[0037] S7, end;

[0038] S7.1. Take out the optical fiber sensor;

[0039] S7.2. Turn off the power.

[0040] It is further defined that the travel of the three-axis adjustment platform in the XYZ directions is 50mm×50mm×10mm.

[0041] It is further defined that the travel of the displacement adjustment platform in three directions of XYZ is 100mm×100mm×100mm.

[0042] It is further defined that the operation display panel includes but is not limited to a computer.

[0043] It is further defined that the bare fiber rotating fixture is provided with a rotating dial.

[0044] It is further defined that in step S1.2, the waiting time is not less than 20 seconds.

[0045] It is further defined that in step S2.1, the slot position and angle measurement is performed by capturing the probe bracket image through a camera, and the position and angle of the slot centerline are extracted through image processing. Straight line detection can be extracted using the mature standard operator lines_gauss.

[0046] It is further defined that in step S4.3, the rotation of the bare fiber rotating fixture may be manually adjusted or automatically adjusted.

[0047] It is further defined that in step S7.2, before the system is completely shut down, each mechanism automatically returns to its original position.

[0048] The beneficial effects of the present invention are as follows:

[0049] The device and method of the present invention can be used to precisely install the probe bracket and the bare fiber probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0051] Figure 1 It is a structural schematic diagram of an embodiment of a preparation device for a micro optical fiber gap sensor of the present invention;

[0052] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0053] Figure 3 A schematic flow chart of an embodiment of a method for preparing a micro optical fiber gap sensor according to the present invention;

[0054] Figure 4 Find the centerline diagram for the probe holder;

[0055] Figure 5 It is a schematic diagram of the bare fiber position angle extraction process;

[0056] Figure 6 A schematic diagram of obtaining a bare fiber ROI area based on adaptive binarization;

[0057] Figure 7 This is a schematic diagram of setting reference lines from top to bottom in the ROI area;

[0058] Figure 8 This is a peak diagram of the profile gradient method;

[0059] Fig. 9 A reference line diagram of 100 endpoints to be extracted is generated for the bare fiber area;

[0060] Fig.10 It is a schematic diagram of the bare fiber endpoint extraction effect and the bare fiber position point effect;

[0061] Fig.11 This is a schematic diagram of the bare fiber position fitting effect;

[0062] The main component symbols are described as follows:

[0063] Machine 1; height visual guide mechanism 2; left bare fiber adjustment mechanism 3; right bare fiber adjustment mechanism 4; visual monitoring mechanism 5; horizontal visual guide mechanism 6; probe bracket vacuum adsorption tooling 7;

[0064] Slide rail 21; height visual guide seat 22; locking head 23; height visual guide module 24;

[0065] Base 31; three-axis adjustment platform 32; bare fiber rotating fixture 33; rotating dial 34;

[0066] Support 51; rotating bracket 52; 45° inclined visual monitoring module 53;

[0067] Displacement adjustment platform 61; displacement frame 62; horizontal visual guidance module 63; rotating clamping table 64; microinjection instrument 65;

[0068] Rotating motor 71 ; bracket 72 ; adsorption platform 73 ; adsorption head 74 ; adsorption hole 75 . DETAILED DESCRIPTION

[0069] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0070] like Figure 1 to Figure 3 As shown, a preparation device for a micro optical fiber gap sensor of the present invention comprises a machine platform 1, on which a height visual guide mechanism 2, a left bare fiber adjustment mechanism 3, a right bare fiber adjustment mechanism 4, a visual monitoring mechanism 5 and a horizontal visual guide mechanism 6 are installed, the left bare fiber adjustment mechanism 3 and the right bare fiber adjustment mechanism 4 are installed relatively, the height visual guide mechanism 2, the visual monitoring mechanism 5 and the horizontal visual guide mechanism 6 are located on the front side, the back side and the rear side of the right bare fiber adjustment mechanism 4, the machine platform 1 is installed with a probe holder vacuum adsorption tooling 7, the probe holder vacuum adsorption tooling 7 is located between the height visual guide mechanism 2, the left bare fiber adjustment mechanism 3, the right bare fiber adjustment mechanism 4, the visual monitoring mechanism 5 and the horizontal visual guide mechanism 6, the height visual guide mechanism 2, the left bare fiber adjustment mechanism 3, the right bare fiber adjustment mechanism 4, the visual monitoring mechanism 5, the horizontal visual guide mechanism 6 and the probe holder vacuum adsorption tooling 7 are electrically connected to an operation display panel;

[0071] The height vision guide mechanism 2 includes a slide rail 21 installed on the machine platform 1, the slide rail 21 is slidably mounted with a height vision guide seat 22, the height vision guide seat 22 is mounted with a locking head 23, and the height vision guide seat 22 is mounted with a height vision guide module 24;

[0072] The left bare fiber adjustment mechanism 3 and the right bare fiber adjustment mechanism 4 have the same structure;

[0073] The left bare fiber adjustment mechanism 3 includes a base 31, a three-axis adjustment platform 32 is installed on the base 31, and a bare fiber rotating fixture 33 is installed on the three-axis adjustment platform 32;

[0074] The visual monitoring mechanism 5 comprises a support 51, on which a rotating bracket 52 is mounted, and on which a visual monitoring module 53 inclined at 45° is mounted;

[0075] The horizontal visual guidance mechanism 6 includes a displacement adjustment platform 61, the displacement adjustment platform 61 is equipped with a displacement frame 62, the displacement frame 62 is L-shaped, the displacement frame 62 is equipped with a horizontal visual guidance module 63, the output end of the horizontal visual guidance module 63 corresponds to the top of the probe bracket vacuum adsorption tooling 7, the displacement frame 62 is equipped with a rotating clamping table 64, and the rotating clamping table 64 is equipped with a microinjection instrument 65;

[0076] The probe bracket vacuum adsorption tool 7 includes a rotating motor 71 installed on the machine 1, a bracket 72 is installed at the output end of the rotating motor 71, the axis of the bracket 72 is perpendicular to the horizontal plane of the machine 1, and an adsorption platform 73 is fixedly installed on the upper end of the bracket 72. The adsorption platform 73 is provided with an adsorption head 74 and an adsorption hole 75. The adsorption head 74 and the adsorption hole 75 are connected, and the suction end of the adsorption head 74 is connected to a vacuum pump through a pipeline;

[0077] A method for preparing a micro optical fiber gap sensor comprises the following steps:

[0078] S1, power on;

[0079] Start the operation display panel;

[0080] S2, fixed probe bracket;

[0081] S2.1. Place the probe holder on the adsorption hole 75 and ensure that the probe holder completely covers the adsorption hole 75;

[0082] S2.2, control the probe bracket vacuum adsorption tool 7 on the operation display panel to fix the probe bracket;

[0083] S3, positioning of probe bracket;

[0084] S3.1. Set the parameters on the operation display panel, check the height positioning line, cooperate with the data fed back by the height visual guidance mechanism 2 on the operation display panel, observe and confirm the collimated height position reference standard line;

[0085] S3.2. After the parameter requirements are met, the position of the probe bracket vacuum adsorption tool 7 is stopped;

[0086] S4, optical fiber positioning;

[0087] S4.1. Manually install the optical fiber line on the left bare fiber adjustment mechanism 3 and the right bare fiber adjustment mechanism 4;

[0088] S4.2. Operate on the operation display panel, wait for the translation stage to move automatically, and confirm whether the optical fiber line is separated on both sides of the edge of the workpiece in the image. You can adjust it by moving the X-axis of the corresponding translation stage;

[0089] S4.3. Confirm whether the horizontal and vertical angles of the left and right optical fibers are both less than 0.02. If not, calibrate with the bare fiber rotating fixture 33;

[0090] S5, optical fiber alignment;

[0091] S5.1. Determine the length parameter of the optical fiber extending into the probe bracket on the operation display panel;

[0092] S5.2, waiting for the system to control the automatic movement of each mechanism to complete;

[0093] S6, micro-controlled dispensing;

[0094] The system controls the microinjector 65 to move to the set position and start applying glue to the optical fibers on the left and right sides;

[0095] S7, end;

[0096] S7.1. Take out the optical fiber sensor;

[0097] S7.2. Turn off the power.

[0098] Preferably, the travel of the three-axis adjustment platform 32 in the XYZ directions is 50mm×50mm×10mm, which can meet the needs of micro-optical fiber preparation and has a compact size. In fact, the travel of the three-axis adjustment platform 32 in the XYZ directions can also be considered according to specific circumstances.

[0099] Preferably, the travel of the displacement adjustment platform 61 in the XYZ directions is 100mm×100mm×100mm, which can meet the needs of micro-optical fiber preparation and has a compact size. In fact, the travel of the displacement adjustment platform 61 in the XYZ directions can also be considered according to specific circumstances.

[0100] The preferred operation display panel includes but is not limited to a computer, which is common and easy to purchase. In fact, the selection of the operation display panel may also be considered according to specific circumstances.

[0101] Preferably, the bare fiber rotating fixture 33 is provided with a rotating dial 34 to facilitate manual adjustment of the angle. In fact, the specifications of the rotating dial 34 may also be considered according to specific circumstances.

[0102] In the preferred step S1.2, the waiting time is not less than 20 seconds, which can ensure that the position of each mechanism is automatically calibrated to the required range. In fact, the waiting time can also be considered according to the specific situation.

[0103] In the preferred step S2.1, the slot position and angle measurement is performed by capturing the probe bracket image through a camera, and the position and angle of the slot centerline are extracted through image processing. Straight line detection can be extracted using the mature standard operator lines_gauss to ensure the clarity of the image display and the accuracy of the position determination, thereby ensuring the accuracy of the operation. In fact, the method and measures for collecting data can also be considered according to the specific situation.

[0104] In the preferred step S4.3, the rotation of the bare fiber rotating fixture 33 can be adjusted manually or automatically, and can achieve the same purpose of use according to economic needs. In fact, the rotation measures of the bare fiber rotating fixture 33 can also be considered according to specific circumstances.

[0105] In the preferred step S7.2, before the system is completely shut down, each mechanism automatically returns to its original position to ensure the accuracy of the next operation. In fact, the actions before the system is completely shut down may also be considered according to specific circumstances.

[0106] In this implementation case, when using a preparation device and method for a micro-optical fiber gap sensor, the operation display panel (hereinafter referred to as the panel) is turned on and started. The panel can be a computer or a correspondingly configured control platform. The configured software is selected in the panel. The software interacts with all mechanisms and displays the data obtained by the feedback mechanism on the panel in real time. Furthermore, after the software is fully started, the position of each mechanism is immediately self-calibrated to ensure that the reference point can be accurately found when the subsequent data parameters are modified;

[0107] The probe holder is placed on the adsorption platform 73 in a manner that the adsorption hole 75 is completely covered, and the vacuum pump is started. The vacuum pump provides suction to the adsorption head 74 through the pipeline, so that the adsorption hole 75 forms a continuous suction force on the probe holder, thereby completing the adsorption fixation of the probe holder;

[0108] The software is operated on the panel to control the rotation motor 71 to drive the bracket 72 to rotate, thereby adjusting the angle of the adsorption platform 73, so as to adjust the angle of the probe bracket adsorbed on the upper side thereof, and the adjustment is repeated until the angle deviation is less than 0.02 mm, and the height scale line is checked on the panel, and then the height position reference standard line of the probe bracket alignment is determined by the height visual guidance module 24;

[0109] Manually clamp the optical fiber through the bare fiber rotating clamps 33 on the left and right sides, and then confirm whether the image of the clamped optical fiber displayed on the panel is separated on both sides of the probe bracket through the interaction between the software and the three-axis adjustment platform 32. The mobility of the three-axis adjustment platform 32 ensures that the above operation can be completed, and then adjust the horizontal and vertical angles of the left and right optical fibers through the panel until the angle is less than 0.02mm;

[0110] According to the image information fed back by the horizontal visual guidance module 63 and the oblique 45° visual monitoring module 53, the length parameter of the optical fiber extending into the probe bracket is determined, and then the length parameter can be changed according to the demand. The panel controls the operation of the three-axis adjustment platform 32 to meet the change of length. This step is to control the distance size between the left and right optical fibers;

[0111] After all positions are determined, the displacement frame 62 is displaced to drive the micro-injection instrument 65 to move. After reaching the set position, the micro-injection instrument 65 dispenses glue on the optical fiber so that the optical fiber is fixed on the probe bracket. After the optical fibers on both sides are fixed on the probe bracket, the preparation of the micro optical fiber gap sensor is completed.

[0112] Remove the fiber optic sensor and turn off the device;

[0113] Further explanation:

[0114] In this application, the method for extracting the position of the notch of the probe bracket and the position of the optical fiber centerline is as follows:

[0115] The slot position and angle measurement uses a camera to collect the probe bracket image, and the position and angle of the slot centerline are extracted through image processing. Straight line detection can be extracted using the mature standard operator lines_gauss, such as Figure 4 As shown, straight line detection is performed based on lines_gauss. The detection result is shown as a red straight line. The position and direction of the straight line can be obtained by straight line fitting, and then the angle between the straight line direction and the horizontal line can be calculated;

[0116] The process of extracting the position angle of the bare fiber probe is as follows: Figure 5 As shown, firstly, the ROI rectangular area of ​​the bare fiber is automatically determined by adaptive binarization (such as Figure 6 The upper and lower ends of the rectangular area are used as the starting points of the reference line. The positions of the two end points of the bare fiber are extracted on the reference line based on the contour gradient method. The midpoint of the end point is used as the bare fiber position point for straight line fitting to obtain the position and angle information of the bare fiber. Then, as shown in FIG. Figure 7 , Figure 8 As shown, the reference line is set from top to bottom in the ROI area. Based on the contour gradient method, the first and last peak points can be extracted, corresponding to the upper and lower endpoints respectively, which will produce the following Fig. 9 The 100 red reference lines shown in Fig.10 As shown in the figure, the endpoints and midpoints of the red reference line are obtained, and a straight line is fitted based on the obtained midpoint position to obtain the following: Fig.11 The bare fiber position is shown (the cyan line is the fitted straight line).

[0117] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A preparation device for a micro optical fiber gap sensor, characterized in that: The machine platform (1) comprises a height visual guide mechanism (2), a left bare fiber adjustment mechanism (3), a right bare fiber adjustment mechanism (4), a visual monitoring mechanism (5) and a horizontal visual guide mechanism (6), the left bare fiber adjustment mechanism (3) and the right bare fiber adjustment mechanism (4) are installed relative to each other, the height visual guide mechanism (2), the visual monitoring mechanism (5) and the horizontal visual guide mechanism (6) are located on the front side, the back side and the rear side of the right bare fiber adjustment mechanism (4), and the machine platform (1) is installed with a probe bracket vacuum suction A tooling (7) is provided, wherein the probe bracket vacuum adsorption tooling (7) is located between the height visual guide mechanism (2), the left bare fiber adjustment mechanism (3), the right bare fiber adjustment mechanism (4), the visual monitoring mechanism (5) and the horizontal visual guide mechanism (6); the height visual guide mechanism (2), the left bare fiber adjustment mechanism (3), the right bare fiber adjustment mechanism (4), the visual monitoring mechanism (5), the horizontal visual guide mechanism (6) and the probe bracket vacuum adsorption tooling (7) are electrically connected to an operation display panel; The height vision guide mechanism (2) comprises a slide rail (21) mounted on the machine platform (1), the slide rail (21) being slidably mounted with a height vision guide seat (22), the height vision guide seat (22) being mounted with a locking head (23), and the height vision guide seat (22) being mounted with a height vision guide module (24); The left bare fiber adjustment mechanism (3) and the right bare fiber adjustment mechanism (4) have the same structure; The left bare fiber adjustment mechanism (3) comprises a base (31), the base (31) is equipped with a three-axis adjustment platform (32), and the three-axis adjustment platform (32) is equipped with a bare fiber rotation fixture (33); The visual monitoring mechanism (5) comprises a support (51), the support (51) is equipped with a rotating bracket (52), and the rotating bracket (52) is equipped with a visual monitoring module (53) inclined at 45 degrees; The horizontal visual guidance mechanism (6) comprises a displacement adjustment platform (61), the displacement adjustment platform (61) is equipped with a displacement frame (62), the displacement frame (62) is L-shaped, the displacement frame (62) is equipped with a horizontal visual guidance module (63), the output end of the horizontal visual guidance module (63) corresponds to the top of the probe bracket vacuum adsorption tooling (7), the displacement frame (62) is equipped with a rotating clamping platform (64), and the rotating clamping platform (64) is equipped with a microinjection instrument (65); The probe bracket vacuum adsorption tooling (7) comprises a rotating motor (71) mounted on the machine (1); a bracket (72) is mounted on the output end of the rotating motor (71); the axis of the bracket (72) is perpendicular to the horizontal plane of the machine (1); an adsorption platform (73) is fixedly mounted on the upper end of the bracket (72); the adsorption platform (73) is provided with an adsorption head (74) and an adsorption hole (75); the adsorption head (74) and the adsorption hole (75) are connected; and the suction end of the adsorption head (74) is connected to a vacuum pump via a pipeline.

2. The device for preparing a micro optical fiber gap sensor according to claim 1, characterized in that: The travel of the three-axis adjustment platform (32) in the three directions of X, Y and Z is 50 mm×50 mm×10 mm.

3. The device for preparing a micro optical fiber gap sensor according to claim 1, characterized in that: The travel range of the displacement adjustment platform (61) in three directions of X, Y and Z is 100 mm×100 mm×100 mm.

4. The device for preparing a micro optical fiber gap sensor according to claim 1, characterized in that: The operation display panel includes but is not limited to a computer.

5. The device for preparing a micro optical fiber gap sensor according to claim 1, characterized in that: The bare fiber rotating fixture (33) is provided with a rotating dial (34).

6. A method for preparing a micro optical fiber gap sensor, comprising a preparation device for a micro optical fiber gap sensor as claimed in any one of claims 1 to 5, characterized in that: The method comprises the following preparation steps: S1, power on; Start the operation display panel; S2, fixed probe bracket; S2.

1. Place the probe holder on the adsorption hole (75), and ensure that the probe holder completely covers the adsorption hole (75); S2.2, controlling the probe holder vacuum adsorption tooling (7) on the operation display panel to fix the probe holder; S3, positioning of probe bracket; S3.

1. Set parameters on the operation display panel, check the height positioning line, cooperate with the data fed back on the operation display panel by the height visual guidance mechanism (2), observe and confirm the aligned height position reference standard line; S3.2, after the parameter requirements are met, the position of the vacuum adsorption tooling (7) of the probe bracket is stopped; S4, optical fiber positioning; S4.

1. Manually install the optical fiber line on the left bare fiber adjustment mechanism (3) and the right bare fiber adjustment mechanism (4); S4.2, operate on the operation display panel, wait for the translation stage to move automatically, and confirm whether the optical fiber line is separated on both sides of the edge of the workpiece in the image, and adjust it by moving the X-axis of the corresponding translation stage; S4.

3. Confirm whether the horizontal and vertical angles of the left and right optical fibers are both less than 0.

02. If not, calibrate them with the bare fiber rotating fixture (33); S5, optical fiber alignment; S5.

1. Determine the length parameter of the optical fiber extending into the probe bracket on the operation display panel; S5.2, waiting for the system to control the automatic movement of each mechanism to complete; S6, micro-controlled dispensing; The system controls the microinjector (65) to move to a set position and then starts applying glue to the optical fibers on the left and right sides; S7, end; S7.

1. Take out the optical fiber sensor; S7.

2. Turn off the power.

7. The method for preparing a micro optical fiber gap sensor according to claim 6, characterized in that: In step S1.2, the waiting time is not less than 20 seconds.

8. The method for preparing a micro optical fiber gap sensor according to claim 6, characterized in that: In step S2.1, the slot position and angle measurement is performed by collecting the probe bracket image through the camera, and the position and angle of the slot centerline are extracted through image processing. The straight line detection can be extracted using the mature standard operator lines_gauss.

9. The method for preparing a micro optical fiber gap sensor according to claim 6, characterized in that: In step S4.3, the rotation of the bare fiber rotating fixture (33) may be manually adjusted or automatically adjusted.

10. The method for preparing a micro optical fiber gap sensor according to claim 6, characterized in that: In step S7.2, before the system is completely shut down, each mechanism automatically returns to its original position.

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