Internal calibration mechanism for micrometer strain gauge
By designing an automated calibration mechanism in the kilometer strain gauge, the automatic up and down movement of the weights is achieved using stepper motors and eccentric sleeves, the troubles and errors of manual calibration are solved, and calibration accuracy and accuracy are improved.
Patent Information
- Application Number
- CN202323601885.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2033-12-28
AI Technical Summary
The calibration of existing kilometer strain gauge requires manual loading of weights, which is troublesome and prone to errors, affecting the accuracy of measurement.
A kilometer strain gauge internal calibration mechanism is designed, and a stepper motor is used to drive the eccentric sleeve and the moving bracket to realize the automatic up and down movement of the weights and automatically complete the calibration process.
By automatically loading weights, calibration accuracy is improved, human operation errors are reduced, and calibration process is simplified.
Smart Images
Figure CN222298723U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of thousandths strain gauges, in particular to an internal calibration mechanism for thousandths strain gauges. Background Art
[0002] A quarter-point strain gauge is an instrument used to measure the surface strain of an object. It is a special strain gauge that can measure tiny changes in surface strain of an object and is usually used in fields such as material mechanics and structural engineering.
[0003] The purpose of loading weights is to calibrate and test the sensor to ensure its accuracy and reliability. By loading weights, the weight in actual applications can be simulated, and the sensor can be measured and calibrated to determine whether its output accurately reflects the actual weight. Currently, the thousandths strain gauges on the market are calibrated by manually loading weights on the strain gauge sensors, which is not only very troublesome, but also will cause errors due to user errors, which is not conducive to user use. Utility Model Content
[0004] The utility model aims to solve the shortcomings in the prior art and proposes a thousandths strain gauge internal calibration mechanism.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] The thousandths strain gauge internal calibration mechanism comprises a base, a strain gauge sensor is installed above the base, and a weight bracket is arranged above the strain gauge sensor; a fixed bracket is installed above the base, the fixed bracket is sleeved behind the strain gauge sensor, a movable bracket is movably arranged on the fixed bracket, a weight is arranged on the movable bracket, and an eccentric sleeve is connected to the rear of the movable bracket.
[0007] In addition, a preferred structure is that the movable bracket is arranged behind the weight bracket, and the weight on the movable bracket and the load-bearing platform of the weight bracket are in the same vertical position.
[0008] In addition, a preferred structure is that a stepper motor is arranged at the rear of the fixed bracket, a tension spring is arranged on the output end of the stepper motor, and the other end of the tension spring is connected to the eccentric sleeve.
[0009] In addition, a preferred structure is that the eccentric sleeve passes through the fixed bracket and is connected to the movable bracket, and the movable bracket is located on the fixed bracket.
[0010] In addition, a preferred structure is that when the eccentric sleeve rotates downward, the movable bracket and the weight move vertically downward, and the weight leaves the movable bracket and hangs on the load-bearing platform of the weight bracket.
[0011] In addition, a preferred structure is that the downward movement distance of the weight is 2.5 mm and the weight of the weight is 200 g.
[0012] The beneficial effects of the utility model are as follows: the basic function of force monitoring of the device can be realized by setting the strain gauge sensor, and the rotation of the eccentric sleeve driven by the stepping motor can make the movable bracket drive the weight to move up and down, so that the weight can be automatically placed on the weight bracket, or automatically lifted from the weight bracket, so as to complete the automatic loading of the weight, thereby automatically calibrating the accuracy of the strain gauge sensor. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a structural schematic diagram of the internal calibration mechanism of the thousandths strain gauge proposed in the utility model;
[0014] Figure 2 This is a front structural schematic diagram of the thousandths strain gauge internal calibration mechanism proposed by the utility model;
[0015] Figure 3 This is a schematic diagram of the front internal structure of the thousandths strain gauge internal calibration mechanism proposed by the utility model;
[0016] Figure 4 It is a top view structural schematic diagram of the thousandths strain gauge internal calibration mechanism proposed by the utility model;
[0017] Figure 5 It is a side structural schematic diagram of the thousandths strain gauge internal calibration mechanism proposed by the utility model.
[0018] In the figure: 1 base, 2 strain gauge sensor, 3 weight, 4 weight bracket, 5 fixed bracket, 6 movable bracket, 7 stepper motor, 8 tension spring, 9 eccentric sleeve. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0020] Reference Figure 1-5 The thousandths strain gauge internal calibration mechanism comprises a base 1, a strain gauge sensor 2 is installed on the top of the base 1, and a weight bracket 4 is arranged on the top of the strain gauge sensor 2; a fixed bracket 5 is installed on the top of the base 1, and the fixed bracket 5 is sleeved on the rear of the strain gauge sensor 2, a movable bracket 6 is movably arranged on the fixed bracket 5, a weight 3 is arranged on the movable bracket 6, and an eccentric sleeve 9 is connected to the rear of the movable bracket 6.
[0021] The mobile bracket 6 is arranged behind the weight bracket 4, and the weight 3 on the mobile bracket 6 is in the same vertical position as the load-bearing platform of the weight bracket 4. The load-bearing end of the weight 3 on the mobile bracket 6 is located in the gap between the weight brackets 4, so that when the mobile bracket 6 moves, its load-bearing end can pass through the weight bracket 4 to move up and down.
[0022] Among them, a stepper motor 7 is arranged behind the fixed bracket 5, and a tension spring 8 is arranged on the output end of the stepper motor 7, and the other end of the tension spring 8 is connected to the eccentric sleeve 9. The stepper motor 7 can drive the tension spring 8 to stretch, so that the eccentric sleeve 9 can be rotated, so that the movable bracket 6 can be controlled to move through the eccentric sleeve 9.
[0023] The eccentric sleeve 9 passes through the fixed bracket 5 and is connected to the movable bracket 6, and the movable bracket is located on the fixed bracket 5. The rotation of the eccentric sleeve 9 can drive the movable bracket 6 to move up and down.
[0024] When the eccentric sleeve 9 rotates downward, the movable bracket 6 and the weight 3 move vertically downward, and the weight 3 leaves the movable bracket 6 and hangs on the load-bearing platform of the weight bracket 4. In this way, the weight 3 can be hung on the load-bearing platform, and when the eccentric sleeve 9 moves upward, the movable bracket 6 moves upward to lift the weight 3 from the load-bearing platform.
[0025] The downward movement distance of the weight 3 is 2.5 mm, and the weight of the weight is 200 g. By standardizing the movement distance and weight of the weight 3, the accuracy of calibration by loading the weight can be improved.
[0026] In this embodiment, a strain gauge sensor 2 is installed above the base 1, and a weight bracket 4 is arranged above the strain gauge sensor 2. The force can be monitored by the arrangement of the strain gauge sensor 2, and the strain gauge sensor 2 can be calibrated by loading the weight 3 by the arrangement of the weight bracket 4 above it. A fixed bracket 5 is installed above the base 1, and the fixed bracket 5 is sleeved behind the strain gauge sensor 2. A movable bracket 6 is movably arranged on the fixed bracket 5, and the weight 3 is arranged on the movable bracket 6, and an eccentric sleeve 9 is connected to the rear of the movable bracket 6. By setting the stepper motor 7 on the fixed bracket 5, the movable bracket 6 can be moved up and down, so that the weight 3 can be loaded through the movable bracket 6, so that the automatic calibration of the strain gauge sensor 2 can be completed.
[0027] Furthermore, when the user needs to calibrate the strain gauge sensor 2, it is only necessary to drive the eccentric sleeve 9 to rotate downward through the stepper motor 7, so that the mobile bracket 6 and the weight 3 move downward vertically. During the movement, the bearing end of the mobile bracket 6 will pass through the gap of the weight bracket 4 and move to the bottom of the weight bracket 4. At this time, the weight 4 will be hung on the weight bracket 4 when it moves downward 2.5MM. At this time, the automatic loading of the weight 3 on the strain gauge sensor 2 is completed. After the program operation is completed, it is only necessary to drive the eccentric sleeve 9 to rotate upward by the stepper motor 7. In this way, the mobile bracket 6 can pass through the weight bracket 4 and move upward, and in the process of moving, the weight 3 is lifted from the weight bracket 4, so that the weight 3 leaves the weight bracket 4, so that the calibration of the strain gauge sensor 2 can be completed.
[0028] In the utility model, the basic function of force monitoring of the device can be realized by setting the strain gauge sensor 2. By driving the eccentric sleeve 9 to rotate through the stepping motor 7, the movable bracket 6 can drive the weight 3 to move up and down, so that the weight 3 can be automatically placed on the weight bracket 4, or automatically lifted from the weight bracket 4, so as to complete the automatic loading of the weight 3, thereby automatically calibrating the accuracy of the strain gauge sensor 2.
[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A thousandths strain gauge internal calibration mechanism, comprising a base (1), characterized in that: A strain gauge sensor (2) is installed above the base (1), and a weight bracket (4) is arranged above the strain gauge sensor (2); A fixed bracket (5) is installed above the base (1), the fixed bracket (5) is sleeved behind the strain gauge sensor (2), a movable bracket (6) is movably arranged on the fixed bracket (5), a weight (3) is arranged on the movable bracket (6), and an eccentric sleeve (9) is connected to the rear of the movable bracket (6).
2. The thousandths strain gauge internal calibration mechanism according to claim 1, characterized in that: The movable bracket (6) is arranged behind the weight bracket (4), and the weight (3) on the movable bracket (6) and the bearing platform of the weight bracket (4) are in the same vertical position.
3. The thousandths strain gauge internal calibration mechanism according to claim 2, characterized in that: A stepper motor (7) is arranged at the rear of the fixed bracket (5), a tension spring (8) is arranged on the output end of the stepper motor (7), and the other end of the tension spring (8) is connected to the eccentric sleeve (9).
4. The thousandths strain gauge internal calibration mechanism according to claim 3, characterized in that: The eccentric sleeve (9) passes through the fixed bracket (5) and is connected to the movable bracket (6), and the movable bracket is located on the fixed bracket (5).
5. The thousandths strain gauge internal calibration mechanism according to claim 4, characterized in that: When the eccentric sleeve (9) rotates downward, the movable bracket (6) and the weight (3) move vertically downward, and the weight (3) leaves the movable bracket (6) and hangs on the load-bearing platform of the weight bracket (4).
6. The thousandths strain gauge internal calibration mechanism according to claim 5, characterized in that: The downward movement distance of the weight (3) is 2.5 mm, and the weight of the weight is 200 g.