Stress monitoring device based on fiber grating sensor

Abstract

The invention discloses a stress monitoring device based on a fiber grating sensor, and relates to the related technical field of stress detection. The device comprises a limiting supporting assembly, the limiting supporting assembly comprises a limiting supporting column, transverse limiting columns are fixedly connected to the peripheral side face of the limiting supporting column, a carrying supporting assembly is clamped and matched above the limiting supporting assembly, the carrying supporting assembly comprises a limiting supporting block, and a limiting groove is formed in one side face of the limiting supporting block; a stress detection assembly is fixedly connected to the upper surface of the loading supporting assembly and comprises a transmission supporting table and a monitoring supporting table, a transmission telescopic rod is fixedly connected to the lower surface of the transmission supporting table, and a stress monitor is installed on the upper surface of the monitoring supporting table. The limiting support column horizontally moves to drive the transverse limiting column to synchronously move, the limiting support column is loosened, so that the transverse limiting column is clamped with the limiting groove, flexible mounting and dismounting of the stress monitor are realized, and external stress is prevented from directly acting on the stress monitor.

Description

Technical Field

[0001] The present invention belongs to the technical field related to stress detection, and in particular relates to a stress monitoring device based on a fiber grating sensor. Background Art

[0002] The fiber grating sensor stress monitoring device is a high-precision stress detection system based on fiber grating technology. It can monitor the stress changes of structures or materials under stress in real time. It is widely used in bridges, buildings, aerospace, energy pipelines and other fields. It can detect tiny stress changes, is not affected by electromagnetic fields, and is suitable for strong electromagnetic environments. It can also realize long-distance and multi-point stress distribution monitoring, which is suitable for long-term online monitoring.

[0003] Common stress monitoring devices monitor stress changes according to the magnitude of the external force acting on the stress monitoring device when receiving external force. However, in actual use, the position of the stress monitoring device is fixed, which makes it inconvenient to adjust the stress monitoring device. Moreover, when subjected to large stress, the external stress acts on the stress monitoring device, which easily causes damage to the stress monitoring device. To this end, we provide a stress monitoring device based on a fiber Bragg grating sensor to solve the above technical problems. Summary of the invention

[0004] The purpose of the present invention is to provide a stress monitoring device based on a fiber grating sensor, which solves the problems in the above technical background through the specific structural design of a limit support component, a load support component and a stress detection component.

[0005] To solve the above technical problems, the present invention is implemented through the following technical solutions: The present invention is a stress monitoring device based on a fiber grating sensor, comprising a fixed limit support assembly, the limit support assembly comprising a symmetrically slidably set limit support column, the side surface of the limit support column is symmetrically fixedly connected with two transverse limit columns, and a load-carrying support assembly is snap-fitted on the top of the limit support assembly; the load-carrying support assembly comprises a limit support block corresponding to the transverse limit columns one by one, a limit groove is provided on one side of the limit support block, and the limit groove is snap-fitted with the corresponding transverse limit column; a stress detection assembly is fixedly connected to the upper surface of the load-carrying support assembly, and the stress detection assembly comprises a slidably set transmission support platform and a fixedly set monitoring support platform, the lower surface of the transmission support platform is fixedly connected with a transmission telescopic rod, and a stress monitor is fixedly installed on the upper surface of the monitoring support platform, and the lower surface of the transmission telescopic rod is in contact with the upper surface of the stress monitor.

[0006] The present invention is further configured such that the limiting and supporting assembly includes a fixedly arranged limiting and supporting platform, on the upper surface of which a limiting base is fixedly connected. An adjusting cavity is provided inside the limiting base, and the two limiting support columns are slidably engaged with the hollow limiting base; one end of the limiting support column is fixedly connected with a limiting disc, and a return spring is fixedly connected between the limiting support column and the inner wall of the adjusting cavity. A positioning and guiding hole is provided on the upper surface of the limiting base, and two guiding chutes are symmetrically provided on the opposite side surfaces of the limiting base. The transverse limiting column is adapted to the corresponding guiding chute.

[0007] The present invention is further configured such that the load-carrying and supporting assembly further includes a load-carrying and supporting platform, the limiting support block is fixedly connected to the lower surface of the load-carrying and supporting platform, and a guiding support column is fixedly connected to the lower surface of the load-carrying and supporting platform, and the guiding support column is slidably engaged with the positioning and guiding hole.

[0008] The present invention is further configured such that a first horizontal support plate is fixedly connected to the lower surface of the monitoring support platform, the first horizontal support plate is fixedly connected to the upper surface of the load-carrying and supporting platform, and a second horizontal support plate is fixedly connected to the upper surface of the transmission support platform; a guiding support platform is slidably arranged on the peripheral side surface of the monitoring support platform, and the transmission support platform is slidably engaged with the guiding support platform, and a stress monitoring interval is formed among the transmission support platform, the monitoring support platform and the guiding support platform.

[0009] The present invention is further configured such that two transmission chutes are symmetrically provided on the surface of the guiding support platform, a guiding slide bar is fixedly connected between the opposite side surfaces of the transmission chute, and a transmission slider is slidably arranged on the peripheral side surface of the guiding slide bar; one side surface of the transmission slider is fixedly connected with an elastic element, the elastic element is sleeved on the peripheral side surface of the guiding slide bar, and a damper is fixedly connected to the peripheral side surface of the guiding slide bar, and the elastic element is fixedly connected with the damper.

[0010] The present invention is further configured such that the upper surface of the first horizontal support plate is symmetrically rotatably connected with a first rotating shaft through a first ear plate, and two first transmission connecting rods are symmetrically fixedly connected to the peripheral side surface of the first rotating shaft. The lower surface of the second horizontal support plate is symmetrically rotatably connected with a second rotating shaft through a second ear plate, and two second transmission connecting rods are symmetrically fixedly connected to the peripheral side surface of the second rotating shaft; the first transmission connecting rod is rotatably connected with the corresponding second transmission connecting rod, and the second transmission connecting rod is rotatably connected with the corresponding transmission slider.

[0011] The present invention has the following beneficial effects: 1. By providing a limit support component and a load support component, when pushing the two limit support columns, the horizontal limit column moves synchronously with the limit support column, and the load support platform fits with the limit base. After releasing the limit support column, under the elastic recovery action of the return spring, the horizontal limit column engages with the limit groove on the corresponding limit support block, thereby realizing the flexible installation of the corresponding stress monitor in sequence, which is convenient for the installation and disassembly of the stress monitor.

[0012] 2. By providing a stress detection component, when the second horizontal support plate is subjected to external stress, the transmission support platform slides and approaches the monitoring support platform, the transmission telescopic rod applies an external force to the stress monitor, and the stress monitor monitors the external stress received. At the same time, the two transmission sliders slide along the circumferential side surface of the guide slide rod, and the elastic element is compressed, thereby facilitating the monitoring of the external force stress and avoiding the direct action of the external stress on the stress monitor, resulting in damage to the stress monitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0014] Figure 1 It is a schematic structural diagram of a stress monitoring device based on a fiber Bragg grating sensor.

[0015] Figure 2 It is a schematic structural diagram of the limit support component in the present invention.

[0016] Figure 3 It is a longitudinal structural sectional view of the limit support component in the present invention.

[0017] Figure 4 It is a schematic structural diagram of the load support component in the present invention.

[0018] Figure 5 It is a schematic diagram of the combined use of the limit support component and the load support component in the present invention.

[0019] Figure 6 It is a schematic structural diagram of the stress detection component in the present invention.

[0020] Figure 7 It is a longitudinal structural sectional view of the stress detection component in the present invention.

[0021] In the drawings, the list of components represented by each reference numeral is as follows:

[0022] 1 - Limit support assembly, 101 - Limit support column, 102 - Lateral limit column, 103 - Limit support platform, 104 - Limit base, 105 - Return spring, 106 - Positioning and guiding hole, 107 - Guiding slideway, 2 - Load support assembly, 201 - Limit support block, 202 - Limit groove, 203 - Load support platform, 204 - Guiding support column, 3 - Stress detection assembly, 301 - Transmission support platform, 302 - Monitoring support platform, 303 - Transmission telescopic rod, 304 - Stress monitor, 305 - First horizontal support plate, 306 - Second horizontal support plate, 307 - Guiding support platform, 308 - Transmission slideway, 309 - Guiding slide bar, 310 - Transmission slider, 311 - Elastic element, 312 - Damper, 313 - First rotating shaft, 314 - First transmission connecting rod, 315 - Second rotating shaft, 316 - Second transmission connecting rod. Detailed implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0024] For the first specific embodiment, please refer to Figures 1-7 , the present invention is a stress monitoring device based on a fiber Bragg grating sensor, including a fixedly arranged limit support assembly 1. Specifically, the limit support assembly 1 includes symmetrically sliding limit support columns 101. Two lateral limit columns 102 are symmetrically and fixedly connected to the circumferential side surface of the limit support column 101. A load support assembly 2 is clamped and matched above the limit support assembly 1.

[0025] Furthermore, the load support assembly 2 includes limit support blocks 201 corresponding to the lateral limit columns 102 one by one. A limit groove 202 is formed on one side surface of the limit support block 201. The limit groove 202 is clamped and matched with the corresponding lateral limit column 102.

[0026] Furthermore, a stress detection assembly 3 is fixedly connected to the upper surface of the load support assembly 2. The stress detection assembly 3 includes a slidably arranged transmission support platform 301 and a fixedly arranged monitoring support platform 302. A transmission telescopic rod 303 is fixedly connected to the lower surface of the transmission support platform 301. A stress monitor 304 is fixedly installed on the upper surface of the monitoring support platform 302. The lower surface of the transmission telescopic rod 303 is in contact with the upper surface of the stress monitor 304.

[0027] The operation process of this embodiment is as follows: The limit support assembly 1 is fixedly installed at the corresponding stress monitoring position. Manually push the two limit support columns 101 so that the two limit support columns 101 move horizontally synchronously and approach each other. The lateral limit column 102 moves synchronously with the limit support column 101. Control the load support assembly 2 to fit with the limit support assembly 1. The limit support block 201 corresponds to the corresponding lateral limit column 102. Release the limit support column 101 so that the two limit support columns 101 move away from each other synchronously. The lateral limit column 102 approaches the corresponding limit support block 201 until the lateral limit column 102 is engaged with the corresponding limit groove 202, thereby realizing the position limitation of the load support assembly 2 in sequence, and further realizing the position limitation of the stress detection assembly 3. When the transmission support platform 301 is subjected to external stress, the transmission support platform 301 slides and approaches the monitoring support platform 302. During this process, the transmission support platform 301 drives the transmission telescopic rod 303 to move synchronously, so that the transmission telescopic rod 303 applies an external force to the stress monitor 304, and the external stress received is monitored by the stress monitor 304.

[0028] Specific Embodiment 2. Please refer to Figures 1-7 , on the basis of Specific Embodiment 1, specifically, the limit support assembly 1 includes a fixedly arranged limit support platform 103. The upper surface of the limit support platform 103 is fixedly connected with a limit base 104. An adjustment cavity is opened inside the limit base 104. The two limit support columns 101 are slidably matched with the hollow limit base 104. One end of the limit support column 101 is fixedly connected with a limit disc. A return spring 105 is fixedly connected between the limit support column 101 and the inner wall of the adjustment cavity. A positioning and guiding hole 106 is opened on the upper surface of the limit base 104. Two guiding chutes 107 are symmetrically opened on the opposite sides of the limit base 104. The lateral limit column 102 is adapted to the corresponding guiding chute 107.

[0029] Furthermore, the load support assembly 2 further includes a load support platform 203. The limit support block 201 is fixedly connected to the lower surface of the load support platform 203. And a guiding support column 204 is fixedly connected to the lower surface of the load support platform 203. The guiding support column 204 is slidably matched with the positioning and guiding hole 106.

[0030] The operation process of this embodiment is as follows: Fix the limit support platform 103 at the corresponding stress monitoring position, manually push the two limit support columns 101 so that the two limit support columns 101 move horizontally synchronously and approach each other. The return spring 105 is compressed, and the lateral limit column 102 moves synchronously with the limit support column 101 along the corresponding guide slideway 107. Control the guide support column 204 to slide along the positioning guide hole 106 until the load support platform 203 fits against the limit base 104 and the limit support block 201 corresponds to the corresponding lateral limit column 102. Release the limit support column 101. Under the elastic recovery action of the return spring 105, the two limit support columns 101 move synchronously away from each other, and the lateral limit column 102 approaches the corresponding limit support block 201 until the lateral limit column 102 engages with the limit groove 202 on the corresponding limit support block 201, thus realizing the position limitation of the load support assembly 2 in sequence, and further realizing the position limitation of the stress detection assembly 3.

[0031] Specific Embodiment Three. Please refer to Figures 1-7 , based on Specific Embodiment One and Specific Embodiment Two. Specifically, a first horizontal support plate 305 is fixedly connected to the lower surface of the monitoring support platform 302, and the first horizontal support plate 305 is fixedly connected to the upper surface of the load support platform 203. A second horizontal support plate 306 is fixedly connected to the upper surface of the transmission support platform 301. A guide support platform 307 is slidably arranged on the peripheral side surface of the monitoring support platform 302, and the transmission support platform 301 and the guide support platform 307 are slidably matched with each other. A stress monitoring interval is formed among the transmission support platform 301, the monitoring support platform 302, and the guide support platform 307.

[0032] Further, two transmission slideways 308 are symmetrically formed on the surface of the guide support platform 307. A guide slide rod 309 is fixedly connected between the opposite side surfaces of the transmission slideway 308. A transmission slider 310 is slidably arranged on the peripheral side surface of the guide slide rod 309. A side surface of the transmission slider 310 is fixedly connected with an elastic element 311. The elastic element 311 is sleeved on the peripheral side surface of the guide slide rod 309. A damper 312 is fixedly connected to the peripheral side surface of the guide slide rod 309, and the elastic element 311 and the damper 312 are fixedly connected to each other.

[0033] Further, the upper surface of the first horizontal support plate 305 is symmetrically rotatably connected with a first rotating shaft 313 through first ear plates. Two first transmission connecting rods 314 are symmetrically fixedly connected to the peripheral side surface of the first rotating shaft 313. The lower surface of the second horizontal support plate 306 is symmetrically rotatably connected with a second rotating shaft 315 through second ear plates. Two second transmission connecting rods 316 are symmetrically fixedly connected to the peripheral side surface of the second rotating shaft 315. The first transmission connecting rod 314 and the corresponding second transmission connecting rod 316 are rotatably connected, and the second transmission connecting rod 316 and the corresponding transmission slider 310 are rotatably connected.

[0034] The operation process of this embodiment is as follows: When the second horizontal support plate 306 is subjected to external stress, the transmission support platform 301 slides and approaches the monitoring support platform 302. During this process, the transmission support platform 301 drives the transmission telescopic rod 303 to move synchronously, so that the transmission telescopic rod 303 exerts an external force on the stress monitor 304, and the stress monitor 304 monitors the external stress received; at the same time, during the sliding process of the transmission support platform 301, it drives the second transmission link 316 to rotate. Under the connection action of the first transmission link 314 and the corresponding second transmission link 316, the two push the corresponding transmission slider 310 to slide along the circumferential side surface of the guiding slide rod 309, so that the elastic element 311 is compressed, and the direct action of the external stress on the stress monitor 304 is gradually reduced, avoiding damage to the stress monitor 304 caused by direct force.

[0035] In the description of this specification, the descriptions referring to the terms "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0036] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A stress monitoring device based on a fiber Bragg grating sensor, comprising a fixed limit support assembly (1), characterized in that: The limit support assembly (1) includes symmetrically slidably arranged limit support columns (101), and two transverse limit columns (102) are symmetrically and fixedly connected to the peripheral side surface of the limit support columns (101). A load support assembly (2) is clamped and matched above the limit support assembly (1); The load support assembly (2) includes limit support blocks (201) corresponding to the transverse limit columns (102) one by one. A limit groove (202) is formed on one side surface of the limit support block (201), and the limit groove (202) is clamped and matched with the corresponding transverse limit column (102); A stress detection assembly (3) is fixedly connected to the upper surface of the load support assembly (2). The stress detection assembly (3) includes a slidably arranged transmission support platform (301) and a fixedly arranged monitoring support platform (302). A transmission telescopic rod (303) is fixedly connected to the lower surface of the transmission support platform (301), a stress monitor (304) is fixedly installed on the upper surface of the monitoring support platform (302), and the lower surface of the transmission telescopic rod (303) is attached to the upper surface of the stress monitor (304).

2. The stress monitoring device based on a fiber Bragg grating sensor according to claim 1, characterized in that, The limit support assembly (1) includes a fixedly arranged limit support platform (103). A limit base (104) is fixedly connected to the upper surface of the limit support platform (103). An adjustment cavity is formed inside the limit base (104), and the two limit support columns (101) are slidably matched with the hollow limit base (104).

3. The stress monitoring device based on a fiber Bragg grating sensor according to claim 2, characterized in that, One end of the limit support column (101) is fixedly connected with a limit disc. A return spring (105) is fixedly connected between the limit support column (101) and the inner wall of the adjustment cavity. A positioning and guiding hole (106) is formed on the upper surface of the limit base (104), and two guiding chutes (107) are symmetrically formed on the opposite side surfaces of the limit base (104). The transverse limit column (102) is adapted to the corresponding guiding chute (107).

4. A stress monitoring device based on a fiber Bragg grating sensor according to claim 3, characterized in that, The load support assembly (2) further includes a load support platform (203). The limit support block (201) is fixedly connected to the lower surface of the load support platform (203), and a guiding support column (204) is fixedly connected to the lower surface of the load support platform (203). The guiding support column (204) is slidably matched with the positioning and guiding hole (106).

5. The stress monitoring device based on a fiber Bragg grating sensor according to claim 4, characterized in that, A first horizontal support plate (305) is fixedly connected to the lower surface of the monitoring support platform (302), the first horizontal support plate (305) is fixedly connected to the upper surface of the load support platform (203), and a second horizontal support plate (306) is fixedly connected to the upper surface of the transmission support platform (301).

6. The stress monitoring device based on a fiber Bragg grating sensor according to claim 5, characterized in that, A guiding support platform (307) is slidably arranged on the peripheral side surface of the monitoring support platform (302). The transmission support platform (301) is slidably matched with the guiding support platform (307). A stress monitoring interval is formed among the transmission support platform (301), the monitoring support platform (302), and the guiding support platform (307).

7. The stress monitoring device based on a fiber Bragg grating sensor according to claim 6, characterized in that, On the surface of the guiding and supporting platform (307), two transmission slideways (308) are symmetrically arranged. A guiding slide rod (309) is fixedly connected between the opposite side surfaces of the transmission slideway (308). A transmission slider (310) is slidably arranged on the circumferential surface of the guiding slide rod (309); One side surface of the transmission slider (310) is fixedly connected with an elastic element (311). The elastic element (311) is sleeved on the circumferential surface of the guiding slide rod (309). A damper (312) is fixedly connected to the circumferential surface of the guiding slide rod (309). The elastic element (311) is fixedly connected to the damper (312).

8. The stress monitoring device based on a fiber Bragg grating sensor according to claim 7, characterized in that, On the upper surface of the first horizontal support plate (305), two first rotating shafts (313) are symmetrically and rotatably connected through first ear plates. Two first transmission connecting rods (314) are symmetrically and fixedly connected to the circumferential sides of the first rotating shafts (313). On the lower surface of the second horizontal support plate (306), two second rotating shafts (315) are symmetrically and rotatably connected through second ear plates. Two second transmission connecting rods (316) are symmetrically and fixedly connected to the circumferential sides of the second rotating shafts (315); The first transmission connecting rod (314) is rotatably connected to the corresponding second transmission connecting rod (316), and the second transmission connecting rod (316) is rotatably connected to the corresponding transmission slider (310).

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