Multi-range pressure sensor calibration device

Abstract

The utility model relates to the technical field of sensor calibration, in particular to a multi-range pressure sensor calibration device, which is provided with a pressure applying assembly, a pressure applying assembly driving device, a to-be-calibrated sensor placement assembly and a position monitoring assembly, and is characterized in that the spatial position change of the pressure applying assembly is realized through the driving device, and the position change condition is monitored through the position monitoring assembly; and when the specified calibration station is reached, batch calibration of the pressure sensors is executed. The device is provided with the pressure sensor placement seats of various specifications, so that the same device can be suitable for calibration of pressure sensors of various specifications, and the application range is wider; each pressure sensor placement seat is provided with a plurality of sensor placement grooves, so that a plurality of pressure sensors of the same model can be calibrated in batches when the pressure sensors of the same model are calibrated, and the calibration efficiency is high; a position sensor and a driving motor are arranged, so that the automation degree of work of the calibration device is improved, and manpower is saved; and the pressure sensor mounting seats are detachably connected with the base, so that the pressure sensor mounting seats for placing the pressure sensors with different models, different shapes and different sizes can be replaced, and the application range of the device is expanded to a greater extent.

Description

Technical Field

[0001] This utility model relates to the field of sensor calibration technology, specifically to the field of a multi-range pressure sensor calibration device. Background Technology

[0002] Pressure sensors require periodic calibration throughout their lifespan to ensure measurement accuracy. Existing technology typically involves applying pressure loads within a specific range to a single sensor, calibrating it by reading the sensor's data against the applied standard pressure. This means that a single calibration device can usually only calibrate one range of pressure sensors, making the process cumbersome and complex, and failing to calibrate multiple ranges of pressure sensors with a single calibration. To address these issues, this application proposes a device suitable for calibrating multi-range pressure sensors. This device enables batch calibration of pressure sensors with multiple ranges, offering wide applicability and high calibration efficiency. Utility Model Content

[0003] The purpose of this invention is to provide a device suitable for calibrating multi-range pressure sensors, which has a wide range of applications and high calibration efficiency.

[0004] To achieve the above objectives, this application provides the following technical solution: a multi-range pressure sensor calibration device, comprising a base, with two bearing seats symmetrically arranged on the top of the left and right side walls of the base, one in front and one in back, each bearing seat containing a bearing; the outer rings of the bearings are interference-fitted with the bearing seats; the inner rings of the left front and right front bearings are interference-fitted with the two cylindrical ends of a lead screw, and the inner rings of the left rear and right rear bearings are interference-fitted with the two cylindrical ends of another lead screw, thereby allowing the two lead screws to rotate in the axial direction while being constrained in other directions; the right ends of the two lead screws are respectively provided with driven gears of the same type, and a drive gear is provided between the two driven gears, with the drive gear simultaneously meshing with both driven gears, and the drive gear being driven to rotate by a drive motor. Under the drive of the drive motor, the drive gear drives the two driven gears to rotate.

[0005] A pressure device mounting base is provided above the lead screw, and support blocks are provided at the four corners of the bottom of the pressure device mounting base. The support blocks have threaded holes that mesh with the lead screw threads. When the two lead screws rotate at the same time, the pressure device mounting base can move translationally along the lead screw axis.

[0006] The pressure device is fixedly installed on the pressure device mounting base, and a through hole is opened in the center of the pressure device mounting base plate to facilitate the extension and retraction of the pressure rod of the pressure device; a high-precision pressure sensor is provided at the end of the pressure rod, and the lower output shaft of the high-precision pressure sensor is connected to the pressure head through a coupling. The high-precision pressure sensor is used to calibrate the sensor under test.

[0007] The base contains pressure sensor holders of various sizes and models. Each holder has multiple slots for accommodating multiple identical pressure sensors for simultaneous calibration, improving efficiency. The base also includes a pressure head holder for use during non-calibration periods. Both the pressure sensor holders and pressure head holders have slots for placing position sensor targets, while the pressure head has a slot for placing position sensors. When the position sensor detects a target position signal, the drive motor stops, bringing the pressure device to a designated position for calibration.

[0008] Preferably, the connection between the pressure sensor mounting base and the base is detachable, allowing for the replacement of pressure sensor mounting bases that hold pressure sensors of different models, shapes, and sizes, thus greatly expanding the applicability of the device.

[0009] Preferably, the high-precision pressure sensor, pressure application device, and output shaft are detachable, making it easy to replace high-precision pressure sensors of different accuracies.

[0010] Preferably, the drive motor and the position sensor, the pressure application device and the high-precision pressure sensor are all connected to the controller for communication. The movement of the drive motor is adjusted by the signal feedback from the position sensor, and the operation of the pressure application device is adjusted by the signal feedback from the high-precision pressure sensor.

[0011] Preferably, the target point information of the position sensor on different pressure sensor placement seats is different, so that the specification of the pressure sensor to be calibrated can be determined based on the target point information.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] (1) Multiple pressure sensor mounting bases are provided, which can enable the same device to be used for the calibration of multiple pressure sensors, thus expanding the applicability.

[0014] (2) Each pressure sensor placement seat is equipped with multiple sensor placement slots. When calibrating pressure sensors of the same model, multiple pressure sensors of the same model can be calibrated in batches, resulting in high calibration efficiency.

[0015] (3) The installation of position sensors and drive motors improves the automation level of the calibration device and saves manpower;

[0016] (4) The connection between the pressure sensor mounting base and the base is set to be detachable, which is used to replace the pressure sensor mounting base for different models, shapes and sizes of pressure sensors, thus greatly improving the applicability of the device. Attached Figure Description

[0017] Figure 1 This is a frontal perspective view of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the second-view perspective structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the second-view structure of the present invention;

[0020] Figure 4 This is a schematic diagram of the pressure application component structure of this utility model;

[0021] Figure 5 This is a top view of the structure of this utility model.

[0022] In the diagram: 1. Base; 2. Bearing seat; 3. Bearing; 4. Pressure sensor placement seat; 5. Pressure sensor placement slot; 6. Position sensor target point; 7. Lead screw; 8. Driven gear; 9. Drive gear; 10. Drive motor; 11. Pressure application device mounting seat; 12. Support block; 13. Pressure application device; 14. High-precision pressure sensor; 15. Coupling; 16. Pressure head; 17. Position sensor; 18. Pressure head placement seat; 19. Threaded hole; 20. Through hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: A multi-range pressure sensor calibration device includes a base 1. Two bearing seats 2 are symmetrically arranged on the top of the left and right side walls of the base 1, one in front and one in back. Bearings 3 are respectively installed inside the bearing seats 2. The outer rings of the bearings 3 are interference-fitted with the inner walls of the bores in the bearing seats 2. The inner rings of the left front and right front bearings 3 are interference-fitted with the two cylindrical ends of a lead screw 7, respectively. The inner rings of the left rear and right rear bearings 3 are interference-fitted with the two cylindrical ends of another lead screw 7, respectively. This allows the two lead screws 7 to rotate in the axial direction while being constrained in other directions. The right ends of the two lead screws 7 are each provided with a driven gear 8 of the same type. A drive gear 9 is located between the two driven gears 8, and the drive gear 9 meshes with both driven gears 8 simultaneously. The drive gear 9 is driven to rotate by a drive motor 10. Under the drive of the drive motor 10, the drive gear 9 drives the two driven gears 8 to rotate, thereby driving the two lead screws 7 to rotate.

[0025] A pressure-applying device mounting base 11 is provided on the lead screw 7. Support blocks 12 are respectively provided at the four corners of the bottom of the pressure-applying device mounting base 11. The support blocks 12 have threaded holes 19 that mesh with the lead screw threads. Under the drive of the drive motor 10, the drive gear 9 drives the two driven gears 8 to rotate, which in turn drives the two lead screws 7 to rotate. When they rotate simultaneously, the pressure-applying device mounting base 11 can translate along the axis of the lead screw 7.

[0026] A pressure device 13 is fixedly installed on the pressure device mounting base 11, and a through hole 20 is opened in the center of the surface of the pressure device mounting base plate 11 to facilitate the extension and retraction of the pressure rod of the pressure device; a high-precision pressure sensor 14 is provided at the end of the pressure rod, and the lower output shaft of the high-precision pressure sensor 14 is connected to the pressure head 16 through a coupling 15. The high-precision pressure sensor 14 is used to calibrate the sensor under test.

[0027] The base 1 contains pressure sensor holders 8 of various specifications, accommodating pressure sensors of different sizes and models. Each pressure sensor holder has multiple pressure sensor slots 10, allowing for the simultaneous placement of multiple pressure sensors of the same model for calibration, improving calibration efficiency. The base 1 also contains a pressure head holder 7 for placing pressure heads 16 during non-calibration operations. Each pressure sensor holder and pressure head holder has slots for placing position sensor targets 6, and the pressure end face of the pressure head has a slot for placing position sensors 17. When the position sensor 17 detects the position signal of the position sensor target 6, the drive motor stops, causing the pressure device to stop at the designated position for pressure calibration.

[0028] Preferably, the connection between the pressure sensor mounting base 8 and the base 1 is detachable, which allows for the replacement of pressure sensor mounting bases for different models, shapes, and sizes of pressure sensors, thus greatly improving the applicability of the device.

[0029] Preferably, the high-precision pressure sensor 14, the pressure application device 13, and the output shaft are detachable, making it easy to replace high-precision pressure sensors of different accuracies.

[0030] Preferably, the drive motor 10 and the position sensor 17, and the pressure device 13 and the high-precision pressure sensor 14 are all connected to the controller. The movement of the drive motor 10 is adjusted by the signal feedback of the position sensor 17, and the operation of the pressure device 13 is adjusted by the signal feedback of the high-precision pressure sensor 14.

[0031] Preferably, the position sensor target point 6 on different pressure sensor placement seats 4 has different information, so the specification of the pressure sensor to be calibrated can be determined based on the target point information.

[0032] The working principle of this utility model is as follows: 1. In the initial state, the pressure head 16 is placed on the pressure head placement seat 18, and the pressure device 13 is in the initial position; wherein, the high-precision pressure sensor 14 is installed on the telescopic rod of the pressure device 13, and the pressure head 16 is connected to the output shaft below the high-precision pressure sensor 14 through the coupling 15; 2. Place the pressure sensor to be calibrated, specifically by fixing the pressure sensor placement seat 4 containing the pressure sensor to be calibrated on the base 1, and multiple pressure sensors to be calibrated can be placed in the pressure sensor placement slot 5 according to the actual situation; 3. Move the pressure device placement seat 11 to the position with the calibration pressure sensor placement seat 4, specifically by driving the drive gear 9 to rotate through the drive motor 10, the drive gear 9 drives the driven gear 8 to rotate, and then drives the lead screw 7 to rotate. Since the lead screw 7 meshes with the threaded holes 19 on the four support blocks 12 on the pressure device mounting seat 11, it drives the pressure sensor to rotate. The pressure device mounting base 11 is moved horizontally. When the position sensor 17 detects that the position sensor target point 6 is at the position of the pressure sensor placement base 4 to be calibrated, the drive motor 10 stops and locks. 5. Pressure calibration: The pressure device 13 drives the pressure head 16 to press down. The pressure is read by the high-precision pressure sensor 14 and fed back to the controller. The controller adjusts the pressure of the pressure device 13 to gradually complete the calibration of different calibration pressure points. 4. After calibration, the pressure assembly is restored. Specifically, after the calibration is completed, the pressure device 13 retracts to a specified height where it is not in contact with the pressure sensor. The drive motor 10 drives the lead screw 7 to rotate, moving the pressure device placement base 11 horizontally to near the initial position. When the position sensor 17 detects the position sensor target point 6 on the pressure head placement base 18, the pressure head 16 is placed on the pressure head placement base 18 to avoid structural errors in the high-precision pressure sensor 14 due to long-term suspension.

[0033] Preferably, the connection between the pressure sensor mounting base 8 and the base 1 is detachable. When the current pressure sensor is not suitable, the pressure sensor mounting slot 5 can be customized with a pressure sensor placement base suitable for the pressure sensor under test, and assembled with the base to complete the batch calibration of the pressure sensor under test, thereby greatly improving the applicability of the device.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A multi-range pressure sensor calibration device, characterized in that: Includes a base (1), with two bearing seats (2) symmetrically arranged on the top of the left and right side walls of the base (1), and bearings (3) respectively installed in the bearing seats (2); the outer ring of the bearing (3) is interference-fitted with the inner wall of the hole of the bearing seat (2); the inner rings of the two bearings (3) on the left front and right front are interference-fitted with the two cylindrical ends of a lead screw (7), and the inner rings of the two bearings (3) on the left rear and right rear are interference-fitted with the two cylindrical ends of another lead screw (7), so that the two lead screws (7) The two lead screws (7) rotate in the axial direction; the right ends of the two lead screws (7) are respectively provided with driven gears (8) of the same type, and a drive gear (9) is provided between the two driven gears (8), and the drive gear (9) meshes with the two driven gears (8) at the same time. The drive gear (9) is driven to rotate by the drive motor (10); under the drive of the drive motor (10), the drive gear (9) drives the two driven gears (8) to rotate, and then drives the two lead screws (7) to rotate. A pressure device mounting base (11) is provided above the lead screw (7). Support blocks (12) are provided at the four corners of the bottom of the pressure device mounting base (11). The support blocks (12) have threaded holes (19) that mesh with the lead screw threads. Under the drive of the drive motor (10), the drive gear (9) drives the two driven gears (8) to rotate, thereby driving the two lead screws (7) to rotate simultaneously. The pressure device mounting base (11) can translate along the axis of the lead screw (7). A pressure device (13) is fixedly installed on the pressure device mounting base (11), and a through hole (20) is opened in the center of the plate surface of the pressure device mounting base (11) to facilitate the extension and retraction of the pressure rod of the pressure device (13); a high-precision pressure sensor (14) is provided at the end of the pressure rod, and the lower output shaft of the high-precision pressure sensor (14) is connected to the pressure head (16) through a coupling (15). The high-precision pressure sensor (14) is used to calibrate the sensor under test. The base (1) is provided with pressure sensor placement seats (18) of various specifications for placing pressure sensors to be calibrated. Each pressure sensor placement seat (18) is used to place a pressure sensor of a certain model to be calibrated. Multiple pressure sensor placement slots (5) are provided on a pressure sensor placement seat to place multiple pressure sensors of the same model to be calibrated in batches, which can be calibrated in batches at the same time, thus improving calibration efficiency. The base (1) is also provided with a pressure head placement seat for placing a pressure head (16) during non-calibration operations. Each pressure sensor placement seat and pressure head placement seat is provided with a slot for placing a position sensor target point (6). A slot for placing a position sensor (17) is provided on the pressure end face of the pressure head. When the position sensor (17) detects the position signal of the position sensor target point (6), the drive motor stops working, so that the pressure device stops at the designated position for pressure calibration.

2. The multi-range pressure sensor calibration device according to claim 1, characterized in that: The connection between the pressure sensor holder (18) and the base (1) is designed to be detachable.

3. The multi-range pressure sensor calibration device according to claim 1, characterized in that: The high-precision pressure sensor (14), the pressure application device (13), and the output shaft are detachable.

4. The multi-range pressure sensor calibration device according to claim 1, characterized in that: The drive motor (10) and position sensor (17), the pressure device (13) and high-precision pressure sensor (14) are all connected to the controller. The movement of the drive motor (10) is adjusted by the signal feedback of the position sensor (17), and the operation of the pressure device (13) is adjusted by the signal feedback of the high-precision pressure sensor (14).

5. The multi-range pressure sensor calibration device according to claim 1, characterized in that: The position sensor target point (6) information on different pressure sensor placement seats (18) is different, so the specification of the pressure sensor to be calibrated can be determined based on the target point information.

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