A pressure sensor calibrating device

Abstract

The utility model relates to structural safety monitoring technical field discloses a kind of pressure sensor rating device, comprising: high-pressure tank body, and multiple groups of mounting holes being arranged around high-pressure tank body, several groups of pressure sensor body are installed in the mounting hole;Through the cooperation between high-pressure tank body, mounting hole, pressure sensor body and pneumatic valve assembly, through the same plane setting of multiple mounting holes, the pressure that each group pressure sensor body is subjected to is same in rating process, avoid the influence of pressure error caused by different water levels, can simultaneously rate multiple pressure sensors, and through the setting of multiple mounting holes, it is convenient to carry out synchronous rating detection to several groups of pressure sensors, pressure is boosted using the pressure boosting mode of pneumatic valve assembly, it can not only perfectly simulate water pressure application environment, but also can be stable and fast pressure boosting, improve the rating efficiency of pressure sensor.

Description

Technical Field

[0001] This utility model relates to the field of structural safety monitoring technology, specifically a pressure sensor calibration device. Background Technology

[0002] In geostress measurement, sensor calibration involves converting sensor readings into equivalent displacements, then using relevant formulas to calculate the magnitude and direction of principal stresses, and establishing the relationship between instrument readings and rock equivalent displacements. This process is called "calibration." Typically, the sensor is installed in a rock specimen, pressure is applied to it, and the relationship curve between the sensor reading and the equivalent displacement, i.e., the calibration curve, is obtained. Based on this, the rock stress value can be calculated from the readings obtained in geostress measurement. However, existing calibration devices involve placing the pressure sensor as a whole into a pressure vessel, sealing the cables, and then pressurizing the pressure vessel for calibration.

[0003] However, the existing calibration method uses a pressure pump to pressurize, which cannot accurately adjust the pressure. Furthermore, the calibration process requires frequent opening and closing of the pressure tank lid to remove and place the pressure sensor, resulting in slow calibration efficiency. Therefore, we need to propose a pressure sensor calibration device. Utility Model Content

[0004] The purpose of this invention is to provide a pressure sensor calibration device. By setting a pressure sensor positioning structure, it is convenient to install multiple pressure sensors that need to be tested, so as to calibrate and test multiple pressure sensors, thereby facilitating and quickly testing the pressure sensor under test, improving the testing efficiency of pressure sensors, and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a pressure sensor calibration device, comprising:

[0006] A high-pressure tank and multiple sets of mounting holes around the high-pressure tank. Pressure sensor bodies are installed in several sets of mounting holes, and a high-precision pressure gauge is installed in one set of mounting holes to monitor the internal pressure of the high-pressure tank in real time.

[0007] The high-pressure tank is equipped with a pneumatic valve assembly, which is used to regulate the internal pressure of the high-pressure tank.

[0008] Preferably, each set of mounting holes is provided with multiple sets of O-rings, and the multiple sets of O-rings are all located between the pressure sensor body and the mounting hole.

[0009] Preferably, a hinge limiting plate is hinged to the mounting hole, the front view cross section of the hinge limiting plate is L-shaped, and one side of the hinge limiting plate abuts against the pressure sensor body.

[0010] Preferably, the pneumatic valve assembly includes a pressure holding valve, a precision pressure regulating valve, an air source, and a pneumatic triplet, which are sequentially connected to the high-pressure tank.

[0011] Preferably, a water pressure chamber is provided in the lower part of the inner cavity of the high-pressure tank, and a pneumatic pressure chamber is provided above the water pressure chamber.

[0012] Preferably, the top two ends of the high-pressure tank are respectively provided with a manual water inlet valve and an automatic water inlet valve, and the automatic water inlet valve is equipped with a water inlet pipe.

[0013] Preferably, a pressure relief valve and a drain valve are arranged sequentially from top to bottom on one side of the high-pressure tank, and the axis of the pressure relief valve is arranged on the same horizontal plane as the contact surface of the air pressure chamber and the water pressure chamber.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This invention primarily utilizes the cooperation between the high-pressure tank, mounting holes, pressure sensor body, and pneumatic valve assembly. By arranging multiple sets of mounting holes on the same plane, the pressure experienced by each pressure sensor body during calibration is identical, avoiding the influence of pressure errors caused by different water levels. This allows for the simultaneous calibration of multiple pressure sensors. Furthermore, the multiple sets of mounting holes facilitate synchronous calibration testing of several pressure sensors. The pneumatic valve assembly uses air pressure boosting to perfectly simulate the water pressure application environment and provides stable and rapid pressurization, thereby improving the calibration efficiency of the pressure sensors. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the planar structure of this utility model.

[0017] In the diagram: 1. Automatic water inlet valve; 2. Pressure holding valve; 3. Precision pressure regulating valve; 4. Pneumatic triplet; 5. Air source; 6. High-pressure tank; 7. Manual water inlet valve; 8. Pressure chamber; 9. Hinge limit plate; 10. Pressure sensor body; 11. O-ring seal; 12. Hydraulic chamber; 13. High-precision pressure gauge; 14. Drain valve; 15. Pressure relief valve; 16. Water inlet pipe. Detailed Implementation

[0018] 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.

[0019] Please see Figure 1 This utility model provides a technical solution: a pressure sensor calibration device, comprising:

[0020] The high-pressure tank 6 and multiple sets of mounting holes around the high-pressure tank 6 are provided. Pressure sensor bodies 10 are installed in several sets of mounting holes, and a high-precision pressure gauge 13 is installed in one set of mounting holes. The high-precision pressure gauge 13 monitors the internal pressure of the high-pressure tank 6 in real time. The pressure at the same horizontal position is monitored in real time by the high-precision pressure gauge 13, which is convenient for comparison with the pressure measured by the pressure sensor body 10. When no pressure sensor is installed in the multiple sets of mounting holes, they are sealed with standard plugs.

[0021] The high-pressure tank 6 is equipped with a pneumatic valve assembly, which is used to regulate the internal pressure of the high-pressure tank 6. The pneumatic valve assembly is used to pressurize the high-pressure tank 6, thereby perfectly simulating the water pressure application environment and stabilizing the pressurization.

[0022] Each set of mounting holes is equipped with multiple sets of O-rings 11, and these O-rings 11 are positioned between the pressure sensor body 10 and the mounting hole. The multiple sets of O-rings 11 seal the pressure sensor body 10 and the mounting hole, thereby ensuring the accuracy of pressure detection.

[0023] A hinge limiting plate 9 is hinged to the mounting hole. The front view of the hinge limiting plate 9 is L-shaped. One side of the hinge limiting plate 9 abuts against the pressure sensor body 10. The length of the hinge limiting plate 9 can be adjusted according to the length of the pressure sensor body 10, so as to facilitate quick and easy installation of the pressure sensor body 10 and improve the installation and positioning efficiency of the pressure sensor body 10.

[0024] The pneumatic valve assembly includes a pressure holding valve 2, a precision pressure regulating valve 3, an air source 5, and a pneumatic triplet 4. The pressure holding valve 2, the precision pressure regulating valve 3, the air source 5, and the pneumatic triplet 4 are sequentially connected to the high-pressure tank 6. By starting the air source 5 and opening the pressure reducing valves in the pressure holding valve 2 and the pneumatic triplet 4, the air pressure chamber is pressurized by the precision pressure regulating valve 3. After the pressure is increased to the required pressure, the pressure holding valve 2 is closed. By repeating this action, the calibration process of the pressure sensor can be achieved.

[0025] A water pressure chamber 12 is provided in the lower part of the inner cavity of the high-pressure tank 6, and an air pressure chamber 8 is provided above the water pressure chamber 12. Water is introduced into the high-pressure tank 6 through the automatic water inlet valve 1 or the manual water inlet valve 7 to the height of the pressure relief valve 15. The pressure relief valve 15 is then closed and the water is injected, thereby completing the water injection into the high-pressure tank 6 so as to perform the pressure boosting rate setting pressure sensor body 10.

[0026] The top of the high-pressure tank 6 is equipped with a manual water inlet valve 7 and an automatic water inlet valve 1 at both ends. The automatic water inlet valve 1 is equipped with a water inlet pipe 16. Water can be easily introduced into the high-pressure tank 6 through the manual water inlet valve 7 and the automatic water inlet valve 1.

[0027] It is worth noting that the water inlet pipe 16 can be made of tap water, while the automatic water inlet valve 1, pressure holding valve 2, drain valve 14, and pressure relief valve 15 are preferably ball valves, and the manual water inlet valve 7 is preferably made of a standard plug that can quickly, accurately and stably adjust the pressurization pressure.

[0028] In addition, the pressure sensor body 10 needs to be calibrated to 0.1% accuracy. According to the provisions of JJF1094-2002 "Evaluation of the Characteristics of Measuring Instruments", when the measurement uncertainty (U95) and the absolute value of the maximum permissible error of the instrument under test (MPEV) satisfy U95≤1 / 3MPEV, it can be directly determined whether the instrument under test meets the requirements. Therefore, the accuracy requirement of the calibration equipment for the pressure sensor body 10 is 0.03%. Therefore, the accuracy of the high-precision pressure gauge 13 should be higher than 0.03%. This device can select a pressure gauge of 0.02 class for testing.

[0029] A pressure relief valve 15 and a drain valve 14 are arranged sequentially from top to bottom on one side of the high-pressure tank 6. The axis of the pressure relief valve 15 is set on the same horizontal plane as the contact surface of the air pressure chamber 8 and the water pressure chamber 12. The pressure relief valve 15 can limit the water injection height while relieving pressure. When water flows out of the pressure relief valve 15, the pressure relief valve 15 is closed, and the manual water inlet valve 7 or the automatic water inlet valve 1 is closed at the same time.

[0030] In use, first install the pressure sensor body 10 to be calibrated on the mounting hole (not shown in the figure) on the outside of the high-pressure tank 6. The mounting hole where the pressure sensor body 10 is not installed is sealed with a standard plug. The pressure sensor body 10 forms a seal with the mounting hole through the O-ring 11 and is positioned under the action of the hinge limit plate 9, which improves the installation efficiency of the pressure sensor. Open the automatic water inlet valve 1 or the manual water inlet valve 7 and the pressure relief valve 15 to let water into the high-pressure tank 6 (at this time, the drain valve is closed). After the water flows out of the pressure relief valve 15, close the automatic water inlet valve 1, the manual water inlet valve 7 and the pressure relief valve 15 in sequence. At this time, start the air source 5, open the pressure holding valve 2 and the pressure reducing valve of the pneumatic triplet 4, and pressurize the air chamber 8 through the precision pressure regulating valve 3. After the pressure in the air chamber 8 reaches the required pressure, close the pressure holding valve 2. Repeat the above steps to realize the calibration process of the pressure sensor body 10.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pressure sensor calibration device, characterized in that, include: The high-pressure tank (6) and multiple sets of mounting holes are provided around the high-pressure tank (6). Pressure sensor bodies (10) are installed in several sets of mounting holes, and a high-precision pressure gauge (13) is provided in one set of mounting holes. The pressure inside the high-pressure tank (6) is monitored in real time by the high-precision pressure gauge (13). The high-pressure tank (6) is equipped with a pneumatic valve assembly, which enables pressure regulation inside the high-pressure tank (6).

2. The pressure sensor calibration device according to claim 1, characterized in that: Each set of mounting holes is provided with multiple sets of O-rings (11), and the multiple sets of O-rings (11) are all located between the pressure sensor body (10) and the mounting hole.

3. The pressure sensor calibration device according to claim 1, characterized in that: A hinge limiting plate (9) is hinged to the mounting hole. The front view section of the hinge limiting plate (9) is L-shaped. One side of the hinge limiting plate (9) abuts against the pressure sensor body (10).

4. The pressure sensor calibration device according to claim 1, characterized in that: The pneumatic valve assembly includes a pressure holding valve (2), a precision pressure regulating valve (3), an air source (5), and a pneumatic triplet (4), which are connected to the high-pressure tank (6) in sequence.

5. A pressure sensor calibration device according to claim 1, characterized in that: The lower part of the inner cavity of the high-pressure tank (6) is provided with a water pressure chamber (12), and the upper part of the water pressure chamber (12) is provided with a gas pressure chamber (8).

6. The pressure sensor calibration device according to claim 1, characterized in that: The top two ends of the high-pressure tank (6) are respectively equipped with a manual water inlet valve (7) and an automatic water inlet valve (1), and a water inlet pipe (16) is installed on the automatic water inlet valve (1).

7. A pressure sensor calibration device according to claim 1, characterized in that: A pressure relief valve (15) and a drain valve (14) are arranged sequentially from top to bottom on one side of the high-pressure tank (6). The axis of the pressure relief valve (15) is set on the same horizontal plane as the contact surface of the air pressure chamber (8) and the water pressure chamber (12).

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