A calibration device for an accelerometer
By simplifying the structure and optimizing the vibration parameter adjustment of the accelerometer calibration device, the problems of complexity and instability of existing devices have been solved, achieving efficient and accurate calibration results.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU YIHAI EQUIP TECH CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-06-30
AI Technical Summary
Existing accelerometer calibration devices are complex in structure and cumbersome in operation. They have limited range of vibration parameter adjustment and cannot simulate various acceleration environments, which affects the accuracy and comprehensiveness of the calibration results. Furthermore, they lack stability and are prone to shaking or deviation, thus affecting the calibration accuracy.
A calibration device comprising a base, a vibration generating mechanism, a clamping mechanism, and a data acquisition processor is designed. Utilizing components such as a variable frequency motor, a rotating disk, a cam, and a swinging component, it achieves simple and efficient vibration parameter adjustment. Combined with structures such as a sliding rod, a vibration table, and a slide rail, it ensures the stability of the device. The clamping mechanism fixes the sensor through a U-shaped frame and a threaded rod, and the data acquisition processor compares the sensor data in real time.
It simplifies the operation process, improves the accuracy and comprehensiveness of the verification results, reduces the impact of shaking and deviation, ensures the stability and accuracy of the sensor during the verification process, and provides reliable data support.
Smart Images
Figure CN224436349U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sensor calibration, and in particular to a calibration device for an accelerometer. Background Technology
[0002] Accelerometers, as electronic devices that accurately measure acceleration, play an indispensable role in key fields such as automobiles, aerospace, and industrial automation. Regular calibration, as a core link to ensure the accuracy of their measurements, is of paramount importance. The core objective of calibration is to ensure that the sensor's measurement data always maintains a high degree of consistency with the actual acceleration value. Through a scientific and standardized calibration process, it is possible to promptly confirm whether the sensor's key performance parameters, such as sensitivity, zero-point offset, and linearity, are within the standard range, providing a reliable basis for subsequent data analysis and equipment control.
[0003] Currently, existing accelerometer calibration devices have some shortcomings. Some calibration devices have complex structures and are cumbersome to operate, making it difficult to complete the calibration work quickly and efficiently. Some calibration devices have limited vibration parameter adjustment ranges and cannot simulate various different acceleration environments, which affects the accuracy and comprehensiveness of the calibration results. In addition, some calibration devices lack good stability and are prone to shaking or deviation during the calibration process, thus affecting the calibration accuracy. Therefore, we propose an accelerometer calibration device. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides a calibration device for an accelerometer, which solves the problems mentioned in the background art. Some existing calibration devices are complex in structure, cumbersome in operation, and not convenient for completing calibration work quickly and efficiently. Some calibration devices have limited vibration parameter adjustment range and cannot simulate various different acceleration environments, which affects the accuracy and comprehensiveness of the calibration results. In addition, some calibration devices lack good stability and are prone to shaking or deviation during the calibration process, thus affecting the calibration accuracy.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an accelerometer calibration device, comprising a base, a sensor to be tested, a standard sensor, and a data acquisition processor. The base is provided with a vibration generating mechanism, which in turn provides a clamping mechanism for fixing the sensor to be tested and the standard sensor. The vibration generating mechanism generates controllable vibration acceleration. The vibration generating mechanism includes a T-shaped plate and a variable frequency motor, a rotating disk, a cam, and a swinging component mounted on the T-shaped plate. The variable frequency motor is fixedly mounted on the back of the T-shaped plate, and its output shaft is connected to the rotating disk. The cam is fixedly mounted on the surface edge of the rotating disk. The swinging component slides with the cam and is used to convert the rotation of the rotating disk into periodic oscillations.
[0006] As a further technical solution of this utility model, the vibration generating mechanism also includes a sliding rod, a limiting block, a fixed rod, a vibration table, and a slider that cooperate with the swinging component. Two sets of limiting blocks are provided and fixedly installed at both ends of the front surface of the T-shaped plate. The sliding rod passes through the limiting block and is slidably connected to it. Four sets of sliders are provided and fixedly installed at the four bottom corners of the vibration table. The swinging component is rotatably connected to the T-shaped plate through a pin.
[0007] As a further technical solution of this utility model, the swinging component is a component with a gear structure, and the sliding rod is provided with a rack that meshes with the gear structure on the swinging component.
[0008] As a further technical solution of this utility model, two sets of slide rails are fixedly installed on the surface of the base, and the slider is slidably connected to the inside of the slide rails.
[0009] As a further technical solution of this utility model, the data acquisition processor is used to acquire and compare the output data of the sensor under test and the standard sensor. The data acquisition processor has the functions of data storage and real-time display of the output curve comparison chart of the sensor under test and the standard sensor.
[0010] As a further technical solution of this utility model, the clamping mechanism is provided with two sets, which are respectively used to clamp the sensor to be tested and the standard sensor. The clamping mechanism includes a U-shaped frame, a fixed clamping block, a threaded rod, an adjusting plate and a movable clamping block. The fixed clamping block is fixed inside the rear side of the U-shaped frame. The threaded rod is threaded to one side wall of the U-shaped frame, one end of which is rotatably connected to the movable clamping block and the other end is fixedly connected to the adjusting plate.
[0011] As a further technical solution of this utility model, the fixed clamping block and the movable clamping block are provided with anti-slip pads on opposite sides, and the U-shaped frame is fixedly installed on the surface of the vibration table.
[0012] This invention provides a calibration device for an accelerometer, which has the following advantages compared with the prior art:
[0013] 1. This calibration device cleverly designs a vibration generation mechanism, utilizing a variable frequency motor, rotating disk, cam, and oscillating component to convert rotation into periodic oscillation. Combined with components such as sliding rods and vibration tables, the structure is simple and the transmission is clear. Compared to existing complex devices, the operation process is simplified. With the help of the U-shaped frame and threaded rod of the clamping mechanism, the sensor to be tested and the standard sensor can be quickly fixed, enabling efficient calibration. At the same time, the variable frequency motor can flexibly adjust its output, and in conjunction with the cam, oscillating component, and other structures, it can generate various vibration accelerations, breaking through the limitations of existing devices in adjusting vibration parameters and significantly improving the accuracy of calibration results.
[0014] 2. The device has been optimized for structural stability. The base, as the fundamental load-bearing component, provides stable support for the entire structure. In the vibration generating mechanism, the T-shaped plate and limit block limit and guide the sliding rod. The slider and slide rail work together to ensure the smooth movement of the vibration table, reducing the impact of shaking and deviation during the calibration process. The clamping mechanism uses fixed and movable clamping blocks to clamp the sensor, and anti-slip pads enhance the fixing effect, ensuring the sensor's stable position during calibration. The data acquisition processor accurately collects and compares the data of the sensor under test and the standard sensor, and displays the output curve in real time, assisting the operator in controlling the calibration status. From the movement of the mechanism to the fixation of the sensor, multiple links ensure the stability and reliability of the device, effectively improving the calibration accuracy and solving the calibration error problem caused by insufficient stability of existing devices. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of a calibration device for an accelerometer.
[0016] Figure 2 This is a three-dimensional schematic diagram of the back structure of a calibration device for an accelerometer.
[0017] Figure 3 This is one of the schematic diagrams of the vibration generation mechanism of an accelerometer calibration device;
[0018] Figure 4 This is the second schematic diagram of the vibration generation mechanism of an accelerometer calibration device;
[0019] Figure 5 This is a schematic diagram of the clamping mechanism of an accelerometer calibration device.
[0020] In the diagram: 1. Base; 2. Vibration generating mechanism; 3. Clamping mechanism; 4. Sensor to be tested; 5. Standard sensor; 6. Data acquisition processor; 201. T-shaped plate; 202. Variable frequency motor; 203. Slide rail; 204. Rotating disk; 205. Cam; 206. Swinging component; 207. Limiting block; 208. Sliding rod; 209. Fixed rod; 210. Vibration table; 211. Slider; 301. U-shaped frame; 302. Fixed clamping block; 303. Threaded rod; 304. Adjusting disk; 305. Moving clamping block. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0022] Please see Figure 1-5 This utility model provides a technical solution: a calibration device for an accelerometer, comprising a base 1, a sensor to be tested 4, a standard sensor 5, and a data acquisition processor 6. The base 1 is equipped with a vibration generating mechanism 2, which in turn is equipped with a clamping mechanism 3 for fixing the sensor to be tested 4 and the standard sensor 5. The vibration generating mechanism 2 generates controllable vibration acceleration. The data acquisition processor 6 collects and compares the output data of the sensor to be tested 4 and the standard sensor 5. The data acquisition processor 6 has the functions of data storage and real-time display of a comparison graph of the output curves of the sensor to be tested 4 and the standard sensor 5. The vibration generating mechanism 2 includes a T-shaped plate 201 and a variable frequency motor 202, a rotating disk 204, and a cam 201 mounted on the T-shaped plate 201. The oscillating component 205 and the oscillating component 206, the variable frequency motor 202 are fixedly installed on the back of the T-shaped plate 201 and the output shaft is connected to the rotating disk 204 for transmission. The cam 205 is fixedly installed on the surface edge of the rotating disk 204. The oscillating component 206 slides with the cam 205 and is used to convert the rotation of the rotating disk 204 into periodic oscillation. In this structure, the vibration generating mechanism 2 can accurately generate controllable vibration acceleration, so that the sensor under test 4 and the standard sensor 5 are in a completely consistent vibration environment. The data acquisition processor 6 collects and compares the output data of the two in real time. With its data storage and curve comparison functions, it can accurately judge the measurement accuracy of the sensor under test 4, providing solid and reliable data support for the entire calibration process and ensuring the validity of the calibration results.
[0023] like Figure 3 As shown, the vibration generating mechanism 2 also includes a sliding rod 208, a limiting block 207, a fixing rod 209, a vibration table 210, and a slider 211 that cooperate with the swinging member 206. Two sets of limiting blocks 207 are provided and fixedly installed at both ends of the front surface of the T-shaped plate 201. The sliding rod 208 passes through the limiting block 207 and is slidably connected to it. Four sets of sliders 211 are provided and fixedly installed at the four bottom corners of the vibration table 210. The swinging member 206 is rotatably connected to the T-shaped plate 201 via a pin. The swinging member 206 is a component with a gear structure. The sliding rod 208 is provided with a mechanism for the swinging member 206. The gear structure on component 206 meshes with the rack. In the vibration generating mechanism 2, the swing component 206 slides with the cam 205, smoothly converting the rotation of the rotating disk 204 into periodic oscillation. The gear structure of the swing component 206 meshes with the rack on the sliding rod 208, realizing efficient power transmission. The limit block 207 plays a stable guiding role for the sliding rod 208, and the slider 211 ensures the smooth movement of the vibration table 210. The coordinated work of each component makes the generated vibration stable and controllable, which can well meet the vibration requirements of different verification scenarios.
[0024] like Figure 4As shown, two sets of slide rails 203 are fixedly installed on the surface of the base 1. The slider 211 is slidably connected inside the slide rail 203. The slide rail 203 on the base 1 cooperates with the slider 211 at the bottom of the vibration table 210, which effectively restricts the movement trajectory of the vibration table 210, greatly reduces the lateral offset during the vibration process, and ensures the stability of the vibration direction. This provides a more accurate acceleration environment for the sensor 4 to be tested and the standard sensor 5, and further improves the reliability of the calibration results.
[0025] like Figure 5 As shown, the clamping mechanism 3 has two sets, one for clamping the sensor to be tested 4 and the other for clamping the standard sensor 5. The clamping mechanism 3 includes a U-shaped frame 301, a fixed clamping block 302, a threaded rod 303, an adjusting plate 304, and a movable clamping block 305. The fixed clamping block 302 is fixed inside the rear side of the U-shaped frame 301. The threaded rod 303 is threaded to one side wall of the U-shaped frame 301, with one end rotatably connected to the movable clamping block 305 and the other end fixedly connected to the adjusting plate 304. Anti-slip pads are provided on the opposite sides of the fixed clamping block 302 and the movable clamping block 305. The U-shaped frame 301 is fixedly installed on the surface of the vibration table 210. The two sets of clamping mechanisms 3 are used to fix the sensor to be tested 4 and the standard sensor 5 respectively. By rotating the adjusting plate 304, the threaded rod 303 is rotated, so that the movable clamping block 305 and the fixed clamping block 302 cooperate to clamp the sensor. The anti-slip pads on the opposite side of the fixed clamping block 302 and the movable clamping block 305 enhance the stability of the clamping, prevent the sensor from becoming loose during vibration, ensure that the two sensors can sense the vibration synchronously, and ensure the effectiveness of the data comparison.
[0026] The working principle of this utility model is as follows: When the accelerometer calibration device is working, firstly, the threaded rod 303 is rotated by the adjusting plate 304 of the clamping mechanism 3, which drives the moving clamping block 305 to cooperate with the fixed clamping block 302, respectively, to firmly clamp the sensor to be tested 4 and the standard sensor 5 in the U-shaped frame 301. Due to the anti-slip pads on the opposite sides of the fixed clamping block 302 and the moving clamping block 305, the sensors are ensured not to shift during the calibration process. Subsequently, the vibration generating mechanism 2 is activated, and the frequency converter motor 202 drives the rotating disk 204 to rotate, causing the cam 205 fixed on the edge of the rotating disk 204 to rotate synchronously. The cam 205 slides with the swinging member 206, converting the rotation into the periodic oscillation of the swinging member 206. The gear structure of the moving part 206 meshes with the rack on the sliding rod 208, thereby driving the sliding rod 208 to perform linear reciprocating motion under the guidance of the limiting block 207. The sliding rod 208 then transmits the motion to the vibration table 210, so that the vibration table 210 moves smoothly along the slide rail 203 on the surface of the base 1 through the sliders 211 at the four corners of the bottom, generating different vibration accelerations that can be adjusted by the variable frequency motor 202. During this process, the data acquisition processor 6 collects the output data of the sensor under test 4 and the standard sensor 5 in the vibration environment in real time and compares them. At the same time, it displays the output curve comparison graph of the two in real time. By observing the data and curves, the operator completes the calibration work of the acceleration sensor. At this point, the entire process ends.
[0027] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.
Claims
1. A calibration device for an accelerometer, comprising a base (1), a sensor to be tested (4), a standard sensor (5), and a data acquisition processor (6), characterized in that: The base (1) is provided with a vibration generating mechanism (2), and the vibration generating mechanism (2) is provided with a clamping mechanism (3) for fixing the sensor to be tested (4) and the standard sensor (5). The vibration generating mechanism (2) is used to generate controllable vibration acceleration. The vibration generating mechanism (2) includes a T-shaped plate (201) and a variable frequency motor (202), a rotating disk (204), a cam (205) and a swinging member (206) provided on the T-shaped plate (201). The variable frequency motor (202) is fixedly installed on the back of the T-shaped plate (201) and its output shaft is connected to the rotating disk (204) for transmission. The cam (205) is fixedly installed at the surface edge of the rotating disk (204). The swinging member (206) slides with the cam (205) and is used to convert the rotation of the rotating disk (204) into periodic swinging.
2. The calibration device for an accelerometer according to claim 1, characterized in that: The vibration generating mechanism (2) also includes a sliding rod (208), a limiting block (207), a fixing rod (209), a vibration table (210), and a slider (211) that cooperate with the swinging component (206). The limiting block (207) is provided in two sets and is fixedly installed at both ends of the front surface of the T-shaped plate (201). The sliding rod (208) passes through the limiting block (207) and is slidably connected to it. The slider (211) is provided in four sets and is fixedly installed at the four bottom corners of the vibration table (210). The swinging component (206) is rotatably connected to the T-shaped plate (201) through a pin.
3. The calibration device for an accelerometer according to claim 2, characterized in that: The swing member (206) is a component with a gear structure, and the sliding rod (208) is provided with a rack that meshes with the gear structure on the swing member (206).
4. The calibration device for an accelerometer according to claim 3, characterized in that: Two sets of slide rails (203) are fixedly installed on the surface of the base (1), and the slider (211) is slidably connected to the inside of the slide rails (203).
5. The calibration device for an accelerometer according to claim 1, characterized in that: The data acquisition processor (6) is used to acquire and compare the output data of the sensor under test (4) and the standard sensor (5). The data acquisition processor (6) has the functions of data storage and real-time display of the output curve comparison chart of the sensor under test (4) and the standard sensor (5).
6. The calibration device for an accelerometer according to claim 1, characterized in that: The clamping mechanism (3) is provided with two sets of clamping mechanisms for clamping the sensor to be tested (4) and the standard sensor (5) respectively. The clamping mechanism (3) includes a U-shaped frame (301), a fixed clamping block (302), a threaded rod (303), an adjusting plate (304), and a movable clamping block (305). The fixed clamping block (302) is fixed inside the rear side of the U-shaped frame (301). The threaded rod (303) is threaded to one side wall of the U-shaped frame (301), with one end rotatably connected to the movable clamping block (305) and the other end fixedly connected to the adjusting plate (304).
7. The calibration device for an accelerometer according to claim 6, characterized in that: The fixed clamp (302) and the movable clamp (305) are provided with anti-slip pads on opposite sides, and the U-shaped frame (301) is fixedly installed on the surface of the vibration table (210).