Novel micro strain sensor calibration device

Abstract

The utility model discloses a novel micro strain sensor calibration device, and belongs to the technical field of sensors. The device mainly comprises a supporting column; the mounting plate is mounted on the supporting column; the fixing plate is mounted on the supporting column; the calibration mechanism is installed on the fixing plate and provided with a fixing end, the upper radial bearing is installed at one end of the fixing end, and the lower radial bearing is installed at the other end of the fixing end. The upper fixing block is mounted at the other end of the upper radial bearing; the elastic body is in threaded connection with the upper fixing block; the lower fixing block is in threaded connection with the elastic body; the lower radial bearing is mounted at one end of the lower fixing block; and the measuring mechanism is mounted on the mounting plate. According to the novel micro strain sensor calibration device, the two radial bearings are arranged, so that the measured elastic body can be kept in the vertical direction in the measurement process, interference of force in other directions is avoided, and errors are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of sensors, and specifically to a new micro-strain sensor calibration device. Background Art

[0002] A micro-strain sensor, as the name implies, is a sensor specifically used to measure tiny strains. It is based on the strain effect of materials, that is, when an object is subjected to force or pressure, it will deform, and this deformation can be accurately measured by the sensor.

[0003] Micro-strain sensor calibration refers to establishing the corresponding relationship between the output and input (i.e., strain) of a micro-strain sensor through a series of precise experiments and measurement processes, and determining its error relationship under different usage conditions. The new micro-strain sensor calibration device uses advanced technologies and precision components to comprehensively test and calibrate the micro-strain sensor by simulating a real strain environment.

[0004] However, during a long-term measurement process, the elastic body to be measured may be affected by other forces and produce tiny deformations. When the elastic body to be measured is affected by other forces and undergoes tiny deformations during the calibration process, unavoidable errors will occur, thus affecting the finally measured data.

[0005] Therefore, it is necessary to provide a new micro-strain sensor calibration device to solve the above problems.

[0006] It should be noted that the above information disclosed in this background art section is only used to understand the background art of the concept of the present application, and therefore, it may include information that does not constitute prior art. Summary of the Invention

[0007] Based on the above problems existing in the prior art, the problem to be solved by the present application is: to provide a new micro-strain sensor calibration device, which solves the problem that the elastic body to be measured is affected by collision during the measurement process, resulting in tiny deformations and thus affecting the finally measured data.

[0008] The technical solution adopted by the present application to solve its technical problems is: a new micro-strain sensor calibration device, comprising:

[0009] Support columns;

[0010] A mounting plate, which is mounted on the support columns;

[0011] A fixing plate, which is mounted on the top of the support columns;

[0012] Calibration mechanism, which is installed on the fixed plate. The calibration mechanism has a fixed end and is used to calibrate and verify the performance of the sensor by precisely controlling force and displacement. The calibration mechanism includes:

[0013] Upper centripetal bearing, which is installed at one end of the fixed end;

[0014] Upper fixing block, which is installed at the other end of the upper centripetal bearing;

[0015] Elastomer, which is threadedly connected to the upper fixing block;

[0016] Lower fixing block, which is threadedly connected to the elastomer;

[0017] Lower centripetal bearing, which is installed at one end of the lower fixing block;

[0018] Measuring mechanism, which is installed on the mounting plate and is used to measure the displacement change of the elastomer.

[0019] Furthermore, the support column is fixedly connected with a base, and a test block is fixedly arranged on one side of the lower fixing block.

[0020] Furthermore, a groove is formed on the upper fixing block, a threaded hole is formed on the groove, a fixing bolt is threadedly connected to the threaded hole, connection ends are fixedly arranged at both ends of the elastomer, and threaded holes corresponding to the groove are formed on the connection ends;

[0021] The other end of the elastomer is threadedly connected to the lower fixing block.

[0022] Furthermore, the other end of the lower centripetal bearing is fixedly connected with a connecting rod, the other end of the connecting rod is fixedly connected with a suspension plate, the suspension plate is composed of multiple connecting plates, and the connecting plates are circumferentially distributed around the connecting rod.

[0023] Furthermore, a wire is fixedly arranged on the connecting plate, and a weight tray is fixedly arranged at one end of the wire.

[0024] Furthermore, the measuring mechanism includes a mounting seat fixedly arranged on the mounting plate on one side of the elastomer, a bracket is fixedly arranged on the mounting seat, and a fixing rod is fixedly arranged on the bracket;

[0025] The displacement sensor is detachably arranged on the fixing rod.

[0026] The beneficial effects of the present application are as follows: A new micro-strain sensor calibration device provided by the present application achieves the effect that the elastic body to be measured can maintain a vertical direction during the measurement process by setting two sets of centripetal bearings, avoiding the interference of forces in other directions and reducing errors.

[0027] In addition to the purposes, features, and advantages described above, the present application has other purposes, features, and advantages. The following will refer to the drawings to further elaborate on the present application in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings forming a part of this application are used to provide a further understanding of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0029] Figure 1 is the overall schematic diagram of a new micro-strain sensor calibration device in the present application;

[0030] Figure 2 is Figure 1 the schematic diagram of the calibration mechanism in

[0031] Figure 3 is Figure 1 the schematic diagram of the measurement mechanism in

[0032] Figure 4 is the schematic diagram when a new micro-strain sensor calibration device in the present application is being tested;

[0033] Among them, the reference numerals in the drawings are as follows:

[0034] 1, base; 2, support column; 3, mounting plate; 4, fixing plate; 5, calibration mechanism; 6, measurement mechanism; 50, weight tray; 51, fixed end; 52, upper centripetal bearing; 53, upper fixing block; 54, elastic body; 55, lower fixing block; 56, lower centripetal bearing; 57, connecting rod; 58, hanging plate; 59, iron wire; 60, bracket; 61, displacement sensor; 62, fixing rod; 65, mounting seat; 70, test block; 71, connecting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will refer to the drawings and combine with the embodiments to elaborate on the present application in detail.

[0036] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0037] like Figure 1 - Figure 2 As shown, the present application provides a new micro-strain sensor calibration device, including a base 1, and a plurality of support columns 2 fixedly arranged on the upper end of the base 1, the support columns 2 are used to transfer and distribute weight, so as to maintain the stability of the device;

[0038] At the same time, a mounting plate 3 is fixedly arranged in the middle position on the support column 2, and a fixing plate 4 is fixedly arranged at the top of the support column 2, and a calibration mechanism 5 is fixedly arranged at the lower end of the fixing plate 4, and the calibration mechanism 5 is used to calibrate and verify the performance of the sensor by accurately controlling the force and displacement;

[0039] The calibration mechanism 5 includes a fixed end 51 fixedly arranged at the lower end of the fixed plate 4, and the fixed end 51 is used to maintain stability during the calibration process. At the same time, an upper radial bearing 52 is fixedly arranged at the other end of the fixed end 51, and the upper radial bearing 52 is used to prevent lateral or sideways movement that may occur during the measurement process, thereby improving the measurement accuracy;

[0040] An upper fixing block 53 is fixedly disposed at one end of the upper radial bearing 52. A groove (not shown in the figure) is formed on the upper fixing block 53. A threaded hole is formed on the groove. A fixing bolt (not shown in the figure) is threadedly connected to the threaded hole.

[0041] Meanwhile, an elastic body 54 is arranged inside the groove. The elastic body 54 is a novel micro strain sensor. The elastic body 54 is used to generate deformation after receiving force, thereby converting it into a measurable displacement change.

[0042] Both ends of the elastic body 54 are fixedly provided with connecting ends (not shown in the figure), and threaded holes corresponding to the grooves are opened on the connecting ends, so that the elastic body 54 can be fixedly connected to the upper fixing block 53 by fixing bolts, so as to provide a stable support for the elastic body 54, thereby preventing the elastic body 54 from unnecessary displacement when subjected to upper pressure or tension;

[0043] Meanwhile, a lower fixing block 55 is threadedly connected to the other end of the elastic body 54, and a test block 70 is fixedly arranged on one side of the lower fixing block 55. The test block 70 is used to measure the displacement change area of the elastic body 54, and a lower radial bearing 56 is fixedly arranged at the lower end of the lower fixing block 55;

[0044] It should be noted that the lower centripetal bearing 56 and the upper centripetal bearing 52 are connected by the lower fixing block 55, the upper fixing block 53 and the elastic body 54, ensuring their movement in the vertical direction and avoiding the interference of forces in other directions, thereby reducing errors;

[0045] At the same time, the fixed end 51 is fixedly connected to the fixing plate 4 to facilitate the stability of the structure, thereby reducing the errors caused by the shaking of the device. And a connecting rod 57 is fixedly connected to the other end of the lower centripetal bearing 56, and the connecting rod 57 is used to connect the measuring component;

[0046] The connecting rod 57 passes through the mounting plate 3 and a hanging plate 58 is fixedly connected to one end. The hanging plate 58 is composed of a plurality of connecting plates 71, and the connecting plates 71 are circumferentially distributed around the connecting rod 57 to facilitate maintaining stability during the calibration process and preventing offset or tilt caused by vibration or external interference;

[0047] At the same time, a wire 59 is fixedly arranged on the connecting plate 71, and the wire 59 is used to transmit force. And a weight tray 50 is fixedly arranged at one end of the wire 59, and the weight tray 50 is used to place weights of different weights. Thus, by gradually increasing or decreasing the weight of the weights, the force applied to the elastic body 54 can be controlled, thereby generating the required displacement;

[0048] At the same time, in order to effectively reduce the error problem, a measuring mechanism 6 is vertically arranged in the parallel direction of the elastic body 54, and the measuring mechanism 6 is used to measure the displacement change of the elastic body 54 (refer to Figure 3 );

[0049] The measuring mechanism 6 includes a mounting seat 65 fixedly arranged on the mounting plate 3 on one side of the elastic body 54. A bracket 60 is fixedly arranged on the mounting seat 65, and a fixed rod 62 is fixedly arranged on the bracket 60;

[0050] And a displacement sensor 61 is detachably arranged on the fixed rod 62. The displacement sensor 61 is a high-precision displacement sensor 61 commonly used in the prior art and applicable to this embodiment. The displacement sensor 61 is used to measure the displacement change amount of the elastic body 54 when it is stressed, thereby converting the collected displacement signal into an electrical signal or a digital signal for subsequent data processing and analysis;

[0051] It should be noted that before the test, the displacement sensor 61 can be disassembled and placed at the bottom end of the test block 70 (refer to Figure 4 ), so as to measure the displacement change amount when the elastic body 54 is stressed, so that the displacement accuracy can measure the strain process of 0.1 micron, and the response speed is fast, and there is no need to spend time waiting for the change result during the measurement process;

[0052] Before the initial test is conducted, the operator can disassemble the displacement sensor 61 and place it at the bottom of the test block 70;

[0053] When starting the measurement, by connecting the upper centripetal bearing 52 and the lower centripetal bearing 56 to the elastic body 54, the elastic body 54 can be ensured to be on a vertical straight line, thereby reducing the interference of forces in other directions on the elastic body 54;

[0054] At this time, appropriate weights can be placed on the weight tray 50. When the weights are loaded, the elastic body 54 begins to deform, thus converting into a measurable displacement change;

[0055] At the same time, the displacement sensor 61 at the bottom of the test block 70 reads the change in the displacement of the elastic body 54 as the elastic body 54 deforms, so as to effectively reduce the error problem of calibrating the micro-strain sensor. Furthermore, the measurement accuracy can reach 0.3%. Finally, the sensitivity of the sensor is calibrated through the readings on the displacement sensor 61.

[0056] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A new calibration device for micro-strain sensors, characterized in that: Comprising: Support column (2); Mounting plate (3), which is mounted on the support column (2); Fixed plate (4), which is mounted on the top of the support column (2); Calibration mechanism (5), which is mounted on the fixed plate (4), the calibration mechanism (5) has a fixed end (51), and the calibration mechanism (5) is used to calibrate and verify the performance of the sensor by precisely controlling force and displacement; Upper centripetal bearing (52), which is mounted on one end of the fixed end (51); Upper fixing block (53), which is mounted on the other end of the upper centripetal bearing (52); Elastomer (54), which is threadedly connected to the upper fixing block (53); Lower fixing block (55), which is threadedly connected to the elastomer (54); Lower centripetal bearing (56), which is mounted on one end of the lower fixing block (55); Measuring mechanism (6), which is mounted on the mounting plate (3), and the measuring mechanism (6) is used to measure the displacement change of the elastomer (54).

2. The calibration device for a new micro-strain sensor according to claim 1, wherein: The support column (2) is fixedly connected to a base (1), and a test block (70) is fixedly arranged on one side of the lower fixing block (55).

3. A new microstrain sensor calibration device according to claim 1, characterized in that: A groove is formed on the upper fixing block (53), a threaded hole is formed on the groove, a fixing bolt is threadedly connected to the threaded hole, connecting ends are fixedly arranged at both ends of the elastomer (54), and threaded holes corresponding to the groove are formed on the connecting ends; The other end of the elastomer (54) is threadedly connected to the lower fixing block (55).

4. A new micro-strain sensor calibration device according to claim 1, characterized in that: The other end of the lower centripetal bearing (56) is fixedly connected to a connecting rod (57), the other end of the connecting rod (57) is fixedly connected to a hanging plate (58), the hanging plate (58) is composed of multiple groups of connecting plates (71), and the connecting plates (71) are circumferentially distributed around the connecting rod (57).

5. A new microstrain sensor calibration device according to claim 4, characterized in that: A wire (59) is fixedly arranged on the connecting plate (71), and a weight tray (50) is fixedly arranged at one end of the wire (59).

6. A new microstrain sensor calibration device according to claim 1, characterized in that: The measuring mechanism (6) includes a mounting seat (65) fixedly arranged on the mounting plate (3) on one side of the elastomer (54), a bracket (60) is fixedly arranged on the mounting seat (65), and a fixed rod (62) is fixedly arranged on the bracket (60); A displacement sensor (61) is detachably arranged on the fixed rod (62).

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