A new type of locking fiber grating tilt angle sensor

Abstract

The utility model discloses a novel locking fiber grating inclination sensor relates to the technical field of sensor, including shell, measurement unit, heavy weight lock device, and the shell is box body structure, measurement unit includes substrate pressboard, inclination measurement substrate and temperature compensation substrate and heavy weight, and the substrate is inorganic elastic material solid state package, and heavy weight lock device restricts heavy weight through the control of sliding block's blocking piece movement, and cooperates locking clamping block and prevents misrotation, when working, heavy weight deflection makes inclination measurement substrate deformation, and fiber grating wavelength changes, and the inclination is measured to combine calibration and temperature compensation, and there is no zero drift, adopts inorganic material quality and resists electromagnetic interference, and the life is long, and heavy weight lock device avoids the damage of substrate, realizes long -term stable accurate inclination detection, is applicable to the scene of engineering structure health monitoring.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically a novel locking fiber optic grating tilt sensor. Background Technology

[0002] Angle is one of the most important and fundamental physical quantities that needs to be monitored in various fields. It plays a crucial role in the completion of various engineering projects. Most of the tilt sensors used in traditional tilt measurement devices are based on the principles of electromagnetic effect and capacitance effect, converting the tilt angle into an electrical signal. Although they can achieve high accuracy and resolution during measurement, these weak electrical sensors have defects such as poor resistance to electromagnetic interference, large temperature influence, easy damage or zero drift in harsh environments, and short measurement distance. Moreover, they are increasingly unable to meet the current monitoring requirements in terms of continuity, real-time performance, and measurement sensitivity. This undoubtedly brings great inconvenience to basic engineering measurement.

[0003] Based on the Chinese patent CN112230327A, which discloses "An all-glass encapsulation device and encapsulation method for fiber optic gratings," a novel fiber optic grating sensor substrate was innovatively developed. This substrate solves the problems of poor durability and stability of current fiber optic sensors. Based on this substrate, a novel locking fiber optic grating tilt sensor was developed, which has the advantages of good stability and durability, and can meet the application requirements of complex mining environments. To reduce losses during transportation and use, lower mass production costs, improve processing efficiency, enhance the safety and reliability of monitoring work, and avoid data monitoring being affected by tilt sensor damage, it is necessary to develop a novel locking fiber optic grating tilt sensor. Utility Model Content

[0004] The purpose of this invention is to provide a novel locking fiber optic grating tilt sensor to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A novel locking fiber Bragg grating tilt sensor, comprising a housing (1), a measuring unit (2), and a weight locking device (3); the measuring unit (2) and the weight locking device (3) are both mounted on the housing (1); the housing (1) comprises a base (101), a cover plate (102), a cover plate screw (103), and a fiber optic protective tube locking cap (104); the base (101) and the cover plate (102) are connected by the cover plate screw (103); a fiber inlet support plate (101-3) is provided on the upper part of the base (101) for mounting the measuring unit (2); a fiber outlet support plate (101-4) is provided on the right side of the base (101) for supporting the fiber Bragg grating to pass through the base (101);

[0006] The measuring unit (2) includes a substrate pressure plate (201), a substrate pressure plate screw (202), an inclination measuring substrate (203), a temperature compensation substrate (204), a weight (205), a weight pressure plate (206), a weight pressure plate screw (207), and a weight pressure plate nut (208); the inclination measuring substrate (203) is installed on top of the temperature compensation substrate (204) and covered by the substrate pressure plate (201), and tightened by the substrate pressure plate screw (202); the inclination measuring substrate (203) is connected to the weight (205) by the weight pressure plate (206), the weight pressure plate screw (207), and the weight pressure plate nut (208);

[0007] The heavy object locking device (3) includes a heavy object irregular baffle (301), a heavy object rectangular baffle (302), a baffle connecting piece (303), a baffle connecting piece screw (304), a bottom slider (305), a double-groove disc (306), a disc slider connecting bolt (307), a disc bottom plate (308), a bottom plate fixing screw (309), a screw (310), a fastening nut (311), a sliding block (312), and a locking block (313);

[0008] Connection between the bottom plate (308) of the disc and the base (101): Connection between the double-groove disc (306) and the bottom plate (308): Connection between the double-groove disc (306) and the bottom slider (305): The double-groove disc (306) is provided with an arc-shaped groove (306-2), and the disc slider connecting bolt (307) passes through the arc-shaped groove (306-2) and is fixed on the bottom slider (305), so that the rotational movement of the double-groove disc (306) can be achieved through the cooperation between the arc-shaped groove (306-2) and the disc slider connecting bolt (307). Transformed into the lateral movement of the bottom slider (305); connection between the bottom slider (305) and the baffle (302): the heavy object irregular baffle (301) and the heavy object rectangular baffle (302) are connected as one unit through the baffle connecting piece (303), and the baffle connecting piece (303) and the bottom slider (305) are fixed by the baffle connecting piece screw (304), so that the lateral movement of the bottom slider (305) can synchronously drive the heavy object irregular baffle (301) and the heavy object rectangular baffle (302) to move laterally, thereby realizing the locking or unlocking of the heavy object (205);

[0009] Connection between sliding block (312) and double-groove disc (306): Sliding block (312) and double-groove disc (306) are fixedly connected. When the sliding block (312) is rotated, it can directly drive the double-groove disc (306) to rotate synchronously. Cooperation between locking block (313) and screw (310): Screw (310) is installed on the bottom plate (308) of the disc. Locking block (313) has threads and can be threaded with screw (310). The position of locking block (313) can be fixed by fastening nut (311) so that it abuts against sliding block (312) and restricts the rotation of sliding block (312).

[0010] In a preferred embodiment of this utility model, there is a fiber optic protection tube locking cap (104) on the top surface and the right side surface of the base (101), and the base (101) is a square box structure with one side open.

[0011] In a preferred embodiment of this utility model, the fiber inlet tray (101-3) and the fiber outlet tray (101-4) are both integrally cast with the base (101) and are located inside a square box; a substrate pressure plate (201) is installed on the fiber inlet tray (101-3), and a temperature compensation substrate (204) and an inclination measurement substrate (203) are detachably connected between the fiber inlet tray (101-3) and the substrate pressure plate (201).

[0012] In a preferred embodiment of the present invention, the weight (205) further includes a weight screw hole, and the tilt measuring substrate (203) is tightly attached between the weight plate (206) and the weight (205) by the weight plate screw (207) and the weight plate nut (208).

[0013] In a preferred embodiment of this utility model, the center lines of the tilt measuring substrate (203), the weight (205), the sliding block (312), the double-groove disc (306), the screw (310), and the locking block (313) are coplanar.

[0014] Compared with the prior art, the present invention provides a novel locking fiber Bragg grating tilt sensor, which has the following advantages:

[0015] (1) This utility model can reduce processing volume, lower batch production costs, improve processing efficiency, enhance the safety and effectiveness of monitoring work, and avoid electromagnetic interference factors affecting the authenticity of monitoring data. This utility model uses a weight locking device to restrict the weight between two baffles, effectively preventing damage to the substrate caused by the swinging of the weight before the tilt sensor is installed. After the tilt sensor is installed, the weight locking device is released, allowing the weight to swing with the tilt angle. The tail of the tilt measuring substrate is directly connected to the weight, and the weight always hangs naturally under the action of gravity, without being affected by other factors, greatly reducing measurement errors.

[0016] (2) The temperature compensation substrate simultaneously measures the ambient temperature at the installation location while performing temperature compensation and correction, and is not affected by deformation. The temperature compensation substrate and the tilt measurement substrate are encapsulated in a special glass solid-state package, which has the advantages of long life, anti-oxidation, anti-fatigue and not easy to detach.

[0017] (3) This utility model is applicable to long-term measurement of the inclination change of the surface of tunnel shield machine segments and other structures. The weight locking device, the weight, and the outer shell are all made of metal. It adopts a double-groove disc, which can be flexibly adjusted to accommodate whether the weight is locked or not. The detection process does not use electricity and is an intrinsically safe sensor. It has strong anti-electromagnetic interference performance, can be used for a long time in harsh environments and is not easily damaged. It has a long measurement distance and can meet the current monitoring requirements in terms of continuity, real-time and measurement sensitivity.

[0018] (4) After the sensor is processed, the tilt angle and temperature change are calibrated and a fitting curve is generated. After installation, the initial wavelength and ambient temperature are recorded. Subsequent measurements can be performed by substituting the measured values ​​into the fitting formula to obtain the tilt angle change. There is no zero-point drift phenomenon. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the housing of a novel locking fiber optic grating tilt sensor provided by this utility model.

[0021] Figure 2 This is a schematic diagram of the internal structure of a novel locking fiber optic grating tilt sensor provided by this utility model.

[0022] Figure 3 A front view of a novel locking fiber optic grating tilt sensor provided by this utility model.

[0023] Figure 4 A bottom view of a novel locking fiber optic grating tilt sensor provided by this utility model.

[0024] Figure 5 A top view of a novel locking fiber optic grating tilt sensor provided by this utility model.

[0025] Figure 6 Rear view of a novel locking fiber optic grating tilt sensor provided by this utility model.

[0026] Figure 7 The right view of a novel locking fiber optic grating tilt sensor provided by this utility model.

[0027] Figure 8 This is a partial structural cross-sectional view of a novel locking fiber optic grating tilt sensor provided by this utility model.

[0028] Figure 9 The right view shows a partial structural cross-section of a novel locking fiber optic grating tilt sensor provided by this utility model.

[0029] Figure 10 Another part of the structural cross-section of the right view of a novel locking fiber optic grating tilt sensor provided by this utility model. Detailed Implementation

[0030] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The terms "upper," "lower," "front," "rear," "left," and "right," etc., used when describing the installation position or direction of the structure or components in this embodiment are based on the orientation shown in the accompanying drawings. They are merely for convenience of description, used to distinguish the relative positions of various components or directions, and do not represent the orientation of the device or functional component in this embodiment during use.

[0031] like Figures 1-10 As shown, this utility model embodiment provides a novel locking fiber Bragg grating tilt sensor, including a housing 1, a measuring unit 2, and a weight locking device 3. Both the measuring unit 2 and the weight locking device 3 are mounted on the housing 1. The housing 1 includes a base 101, a cover plate 102, cover plate screws 103, and a fiber optic protective tube locking cap 104. The base 101 and the cover plate 102 are connected by the cover plate screws 103. To facilitate assembly and maintenance inside the housing 1, a box-like structure with a base 101 and a cover plate 102 is adopted.

[0032] The base 101 has a fiber optic protection tube locking cap 104 on both its top and right sides. The base 101 is a square box structure with an opening on one side. A fiber inlet support plate 101-3 is provided on the upper part of the base 101 for mounting the measurement unit 2; a fiber outlet support plate 101-4 is provided on the right side of the base 101 for supporting the fiber grating as it exits the base 101. The fiber inlet support plate 101-3 and the fiber outlet support plate 101-4 are preferably boss structures.

[0033] The measuring unit 2 includes a substrate pressure plate 201, a substrate pressure plate screw 202, an inclination measuring substrate 203, a temperature compensation substrate 204, a weight 205, a weight pressure plate 206, a weight pressure plate screw 207, and a weight pressure plate nut 208. The inclination measuring substrate 203 is installed on top of the temperature compensation substrate 204 and covered by the substrate pressure plate 201, which is tightened by the substrate pressure plate screw 202. The inclination measuring substrate 203 is connected to the weight 205 by the weight pressure plate 206, the weight pressure plate screw 207, and the weight pressure plate nut 208.

[0034] The connection relationships of each functional module in measurement unit 2 are as follows:

[0035] The stacking relationship between the temperature compensation substrate 204 and the tilt measuring substrate 203: The temperature compensation substrate 204 is located below, and the tilt measuring substrate 203 is stacked on top of it, forming an upper and lower stacked structure, which is placed together on the fiber inlet support plate 101-3 of the base 101. Fixing the substrate pressure plate 201 to the substrate: The substrate pressure plate 201 covers the tilt measuring substrate 203. The substrate pressure plate screws 202 pass through the substrate pressure plate 201, the tilt measuring substrate 203, and the temperature compensation substrate 204, engaging with the threaded holes on the fiber inlet support plate 101-3, such as the second threaded hole 101-7, and are tightened to secure the temperature compensation substrate 204 and the tilt measuring substrate 203 between the fiber inlet support plate 101-3 and the substrate pressure plate 201, achieving a detachable connection.

[0036] Connection between the tilt measuring substrate 203 and the weight 205: The end of the tilt measuring substrate 203 is fixedly connected to the weight 205 through a weight plate 206, a weight plate screw 207, and a weight plate nut 208. Specifically, the weight 205 has a weight screw hole. The end of the tilt measuring substrate 203 is sandwiched between the weight plate 206 and the weight 205. The weight plate screw 207 passes through the weight plate 206, the end of the tilt measuring substrate 203, and the screw hole of the weight 205, and is then tightened with the weight plate nut 208, so that the tilt measuring substrate 203 and the weight 205 are tightly fitted and there is no relative movement. Temperature compensation substrate 204 and tilt measuring substrate 203 are stably fixed on the base. The end of tilt measuring substrate 203 is rigidly connected to weight 205 to ensure that the swing of weight 205 can be directly transmitted to tilt measuring substrate 203, causing its deformation to achieve tilt measurement.

[0037] The heavy object locking device 3 includes a heavy object irregular-shaped baffle 301, a heavy object rectangular baffle 302, a baffle connecting piece 303, a baffle connecting piece screw 304, a bottom slider 305, a double-groove disc 306, a disc slider connecting bolt 307, a disc bottom plate 308, a bottom plate fixing screw 309, a screwdriver 310, a fastening nut 311, a sliding block 312, and a locking block 313. The sliding block 312 controls the movement of the heavy object irregular-shaped baffle 301 and the heavy object rectangular baffle 302, thereby restricting the movement of the heavy object 205; the temperature compensation substrate 204 and the tilt angle measuring substrate 203 are both made of inorganic elastic material and are both solid-state encapsulated.

[0038] The connection relationships of the functional modules in the heavy object locking device 3 are as follows:

[0039] Connection between the bottom plate 308 of the disc and the base 101; connection between the double-groove disc 306 and the bottom plate 308; connection between the double-groove disc 306 and the bottom slider 305: The double-groove disc 306 is provided with an arc-shaped groove 306-2, and the disc slider connecting bolt 307 passes through the arc-shaped groove 306-2 and is fixed on the bottom slider 305, so that the rotational movement of the double-groove disc 306 can be converted into the lateral movement of the bottom slider 305 through the cooperation of the arc-shaped groove 306-2 and the disc slider connecting bolt 307.

[0040] Connection between bottom slider 305 and baffle 302: The irregular baffle 301 and the rectangular baffle 302 are connected as one unit by the baffle connecting piece 303. The baffle connecting piece 303 is fixed to the bottom slider 305 by the baffle connecting piece screw 304, so that the lateral movement of the bottom slider 305 can synchronously drive the irregular baffle 301 and the rectangular baffle 302 to move laterally, thereby locking or releasing the weight 205.

[0041] Connection between sliding block 312 and double-groove disc 306: Sliding block 312 is fixedly connected to double-groove disc 306. When sliding block 312 is rotated, it can directly drive double-groove disc 306 to rotate synchronously. It is a direct component for the operator to control the action of the device.

[0042] The locking block 313 and the screw 310 are engaged: the screw 310 is installed on the bottom plate 308 of the disc or a related fixing structure, the locking block 313 is threaded and can be threaded with the screw 310; the position of the locking block 313 can be fixed by the fastening nut 311, so that it abuts against the sliding block 312, restricting the rotation of the sliding block 312, thereby locking the structure in the locked or unlocked state.

[0043] The rotating sliding block 312 drives the double-groove disc 306 to rotate, and the disc slider connecting bolt 307 drives the bottom slider 305 to move. Finally, the position of the irregularly shaped baffle 301 and the rectangular baffle 302 of the weight is controlled by the baffle connecting piece 303 to lock or release the weight 205. The locking block 313 and the locking screw 310 can lock the state of the device to ensure operational stability.

[0044] Both the fiber inlet tray 101-3 and the fiber outlet tray 101-4 are integrally cast with the base 101 and housed within a square box. A substrate pressure plate 201 is mounted on the fiber inlet tray 101-3. A temperature compensation substrate 204 and an inclination measuring substrate 203 are detachably connected between the fiber inlet tray 101-3 and the substrate pressure plate 201. The weight 205 also includes a weight screw hole. The inclination measuring substrate 203 is tightly fitted between the weight pressure plate 206 and the weight 205 via weight pressure plate screws 207 and weight pressure plate nuts 208. The center lines of the inclination measuring substrate 203, the weight 205, the sliding block 312, the double-groove disc 306, the screw 310, and the locking block 313 are coplanar.

[0045] To prevent the frequent back-and-forth swinging of the weight 205 from damaging the tilt measuring substrate 203, a weight locking device 3 is specifically designed. When the sliding block 312 is rotated clockwise, the double-grooved disc 306 will rotate clockwise synchronously. The double-grooved disc 306 has an arc-shaped groove 306-1 that causes the disc slider connecting bolt 307 to move away from the center. The disc slider connecting bolt 307 drives the bottom slider 305 to move outward. The weight-shaped baffle 301 and the weight-rectangular baffle 302 are fixed to the bottom slider 305 through the baffle connecting piece 303. As the weight-shaped baffle 301 and the weight-rectangular baffle 302 move outward, the weight 205 will have space to swing; conversely... When the sliding block 312 is rotated counterclockwise, the double-grooved disc 306 will rotate counterclockwise synchronously. The double-grooved disc 306 has a curved groove 306-1 that causes the disc slider connecting bolt 307 to move closer to the center. The disc slider connecting bolt 307 drives the bottom slider 305 to move inward. The weight-shaped baffle 301 and the weight-rectangular baffle 302 are fixed together with the bottom slider 305 through the baffle connecting piece 303. When the weight-shaped baffle 301 and the weight-rectangular baffle 302 move outward, the weight 205 will be locked and cannot swing. The locking block 313 has threads that can cooperate with the screw 310 to restrict the sliding block 312 and prevent it from rotating.

[0046] The base 101 has a first threaded hole 101-2 on the fiber inlet and outlet end face for installing the fiber protection tube locking cap 104; the optical fiber of the tilt measuring substrate 203 and the temperature compensation substrate 204 enters from the fiber protection tube locking cap 104, passes through the fiber inlet end face 101-1, the fiber inlet support plate 101-3, the substrate pressure plate 201, the tilt measuring substrate 203 and the temperature compensation substrate 204, the weight 205, the fiber outlet support plate 101-4, the fiber outlet end face 101-5, the fiber protection tube locking cap 104, and finally exits from the outer shell 1.

[0047] To securely mount the temperature compensation substrate 204 and the tilt measurement unit substrate 203, the base 101 has a second slot 101-6 on the fiber inlet side of its upper side, and a second threaded hole 101-7 is formed in the second slot. The substrate pressure plate fixing bolt 202 passes through the substrate pressure plate 201, the tilt measurement substrate 203, and the temperature compensation substrate 204 and engages with the second threaded hole 101-7 of the fiber inlet support plate 101-3. The cover plate screw 103 is screwed into the cover plate screw hole 101-8 to fix the cover plate 102.

[0048] The working principle of this invention is as follows: The tilt measuring substrate 203 and the temperature compensation substrate 204 are pressed by the substrate pressure plate 201 and tightly adhered to the surface of the fiber feed tray 101-3; the end of the tilt measuring substrate 203 is connected to the weight 205 and will not move relative to it; the sliding block 312 rotates clockwise to release the restriction of the weight 205, allowing the weight 205 to fall naturally under the action of gravity; the tilt sensor is tilted, and the weight 205 deflects under the action of gravity, causing the tilt measuring substrate 203 to deform, which drives the fiber grating solidly encapsulated on the tilt measuring substrate 203 to produce a deflection change, thereby causing the fiber grating wavelength to change regularly. After the sensor is assembled, the tilt angle and temperature change are calibrated and a fitting curve is generated. After installation, the initial wavelength and ambient temperature are recorded. Subsequent measurements can be performed by substituting the measured values ​​into the fitting formula to obtain the displacement change, and there is no zero-point drift phenomenon.

[0049] All transmission and measuring components are made of inorganic materials, which have the advantages of being resistant to electromagnetic interference, having an ultra-long lifespan, and being suitable for long-term testing.

[0050] Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples of this utility model and are not intended to limit it. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of this utility model as claimed. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A novel locking fiber Bragg grating tilt sensor, characterized in that, It includes a housing (1), a measuring unit (2), and a weight locking device (3); the measuring unit (2) and the weight locking device (3) are both installed on the housing (1); the housing (1) includes a base (101), a cover plate (102), a cover plate screw (103), and a fiber optic protection tube locking cap (104); the base (101) and the cover plate (102) are connected by the cover plate screw (103); a fiber inlet support plate (101-3) is provided on the upper part of the base (101) for installing the measuring unit (2); a fiber outlet support plate (101-4) is provided on the right side of the base (101) for supporting the fiber optic grating to pass through the base (101); The measuring unit (2) includes a substrate pressure plate (201), a substrate pressure plate screw (202), an inclination measuring substrate (203), a temperature compensation substrate (204), a weight (205), a weight pressure plate (206), a weight pressure plate screw (207), and a weight pressure plate nut (208); the inclination measuring substrate (203) is installed on top of the temperature compensation substrate (204) and covered by the substrate pressure plate (201), and tightened by the substrate pressure plate screw (202); the inclination measuring substrate (203) is connected to the weight (205) by the weight pressure plate (206), the weight pressure plate screw (207), and the weight pressure plate nut (208); The heavy object locking device (3) includes a heavy object irregular baffle (301), a heavy object rectangular baffle (302), a baffle connecting piece (303), a baffle connecting piece screw (304), a bottom slider (305), a double-groove disc (306), a disc slider connecting bolt (307), a disc bottom plate (308), a bottom plate fixing screw (309), a screw (310), a fastening nut (311), a sliding block (312), and a locking block (313); Connection between the bottom plate (308) of the disc and the base (101): Connection between the double-groove disc (306) and the bottom plate (308): Connection between the double-groove disc (306) and the bottom slider (305): The double-groove disc (306) is provided with an arc-shaped groove (306-2), and the disc slider connecting bolt (307) passes through the arc-shaped groove (306-2) and is fixed on the bottom slider (305), so that the rotational motion of the double-groove disc (306) can be converted into the bottom slider through the cooperation of the arc-shaped groove (306-2) and the disc slider connecting bolt (307). Lateral movement of block (305); Connection between bottom slider (305) and baffle (302): The heavy object irregular baffle (301) and the heavy object rectangular baffle (302) are connected to the bottom slider (305) as one unit through the baffle connecting piece (303). The baffle connecting piece (303) and the bottom slider (305) are fixed by the baffle connecting piece screw (304), so that the lateral movement of the bottom slider (305) can synchronously drive the heavy object irregular baffle (301) and the heavy object rectangular baffle (302) to move laterally, thereby locking or releasing the heavy object (205); Connection between sliding block (312) and double-groove disc (306): Sliding block (312) and double-groove disc (306) are fixedly connected. When the sliding block (312) is rotated, it can directly drive the double-groove disc (306) to rotate synchronously. Cooperation between locking block (313) and screw (310): Screw (310) is installed on the bottom plate (308) of the disc. Locking block (313) has threads and can be threaded with screw (310). The position of locking block (313) can be fixed by fastening nut (311) so that it abuts against sliding block (312) and restricts the rotation of sliding block (312).

2. The novel locking fiber optic grating tilt sensor according to claim 1, characterized in that, There is a fiber optic protection tube locking cap (104) on the top and right sides of the base (101). The base (101) is a square box structure with one side open.

3. A novel locking fiber optic grating tilt sensor according to claim 1, characterized in that, The fiber inlet tray (101-3) and the fiber outlet tray (101-4) are both integrally cast with the base (101) and are located inside a square box; a substrate pressure plate (201) is installed on the fiber inlet tray (101-3), and a temperature compensation substrate (204) and an inclination measurement substrate (203) are detachably connected between the fiber inlet tray (101-3) and the substrate pressure plate (201).

4. A novel locking fiber optic grating tilt sensor according to claim 1, characterized in that, The weight (205) also includes a weight screw hole, and the tilt measuring substrate (203) is tightly attached between the weight plate (206) and the weight (205) by the weight plate screw (207) and the weight plate nut (208).

5. A novel locking fiber optic grating tilt sensor according to claim 1, characterized in that, The center lines of the tilt measuring substrate (203), the weight (205), the sliding block (312), the double-groove disc (306), the screw (310), and the locking block (313) are coplanar.

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