Pressure sensor calibration device

Abstract

The embodiment of the invention provides a pressure sensor calibration device, and relates to the technical field of equipment detection. The pressure sensor calibration device comprises a main body, a cover plate and detection equipment, the main body is provided with a cavity for placing a pressure sensor, the cover plate is movably arranged on the main body and is used for sealing the cavity and applying pressure to the pressure sensor placed in the cavity, and the detection equipment is electrically connected with the pressure sensor placed in the cavity. The sensor is used for acquiring pressure data and strain data of the pressure sensor. According to the pressure sensor, the pressure sensor is placed in a closed environment through the cavity of the main body and the cover plate, so that displacement of the sensor in the calibration process is avoided, and the calibration precision is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment detection, and in particular to a pressure sensor calibration device. Background Art

[0002] Pressure sensor is a commonly used sensor that can convert the sensed pressure signal into an electrical signal. It is widely used in many fields such as industrial automation, aerospace, oil exploration, etc. However, pressure sensors may have signal deviations after long-term use, so they need to be calibrated regularly to ensure the accuracy of the measurement.

[0003] The existing calibration method usually places the pressure sensor on a storage table and fixes it with a limit column. However, in the process of applying pressure to the pressure sensor, the limit column is easily damaged, causing the pressure sensor to shift, thereby affecting the calibration accuracy of the pressure sensor. Summary of the invention

[0004] The purpose of the present invention includes providing a pressure sensor calibration device, which can improve the calibration accuracy of the pressure sensor.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a pressure sensor calibration device, comprising:

[0007] A main body, wherein the main body is provided with a cavity for placing a pressure sensor;

[0008] a cover plate, the cover plate being movably disposed on the main body and used for sealing the cavity and applying pressure to the pressure sensor placed in the cavity; and

[0009] A detection device is electrically connected to the pressure sensor placed in the cavity and is used to obtain pressure data and strain data of the pressure sensor.

[0010] In an optional embodiment, the main body is provided with a first connecting portion, and the cover plate is provided with a second connecting portion, and the first connecting portion cooperates with the second connecting portion so that the cover plate seals the cavity;

[0011] After the cavity is sealed by the cover plate, the second connection portion is connected to the pressure sensor placed in the cavity to apply pressure to the pressure sensor.

[0012] In an optional embodiment, the first connecting portion and the second connecting portion are threadedly matched.

[0013] In an optional embodiment, the pressure sensor calibration device further includes a pressure regulating member, which is movably disposed on the cover plate and is used to apply pressure to the pressure sensor placed in the cavity after the cavity is sealed by the cover plate.

[0014] In an optional embodiment, a through hole is provided on the cover plate, and the pressure regulating member can be movably disposed in the through hole and connected to the pressure sensor placed in the cavity to apply pressure to the pressure sensor.

[0015] In an optional embodiment, the side wall of the through hole is provided with threads, and the pressure regulating member is a bolt.

[0016] In an optional embodiment, a side wall of the cavity is provided with a groove, and the groove is used to place a signal transmission line of the pressure sensor, and the signal transmission line is connected to the detection device.

[0017] In an optional embodiment, the pressure sensor calibration device further includes a buffer, the shape and size of the buffer are consistent with those of the pressure sensor, and the buffer is placed in the cavity and located between the pressure sensor and the cover plate.

[0018] In an optional embodiment, there are multiple pressure sensors, the number of the buffer components is the same as the number of the pressure sensors, and the multiple pressure sensors and the multiple buffer components are alternately placed in the cavity.

[0019] In an optional embodiment, the multiple pressure sensors are respectively multiple sensors to be calibrated and one calibrated sensor, and the detection device includes a first device and a second device; the first device is electrically connected to each of the sensors to be calibrated, and is used to obtain strain data of the sensors to be calibrated, and the second device is electrically connected to the calibrated sensors, and is used to obtain pressure data of the calibrated sensors.

[0020] The beneficial effects of the pressure sensor calibration device provided by the embodiment of the present invention include placing the pressure sensor in a closed environment through the cavity of the main body and the cover plate, thereby avoiding displacement of the sensor during the calibration process, thereby improving the calibration accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A structural cross-sectional view of the pressure sensor calibration device provided in this embodiment;

[0023] Figure 2 A schematic diagram of the structure of the main body of the pressure sensor calibration device provided in this embodiment;

[0024] Figure 3 A schematic structural diagram of a cover plate of the pressure sensor calibration device provided in this embodiment.

[0025] Icon: 1-main body; 2-cover plate; 3-pressure sensor; 4-buffer; 5-pressure regulating member; 101-cavity; 102-first connecting part; 103-slot; 201-second connecting part; 203-through hole; 6-detection device; 601-first device; 602-second device. DETAILED DESCRIPTION

[0026] Currently, most pressure sensor calibration methods rely on pneumatic or hydraulic devices to apply pressure. This approach has several problems:

[0027] 1. Poor stability: Pneumatic or hydraulic devices tend to shake when applying pressure, which can lead to inaccurate calibration results.

[0028] 2. Limited accuracy: These devices can only adjust pressure in fixed minimum units and cannot achieve continuous, stepless pressure adjustment.

[0029] 3. The sensor is not firmly positioned: Existing calibration devices usually use limit posts to fix the sensor. If the limit posts are damaged, the sensor may shift, affecting the calibration results.

[0030] 4. Reliance on high-precision pressure gauges: A high-precision pressure gauge is usually required to assist in the measurement during the calibration process, but high-precision pressure gauges are expensive and have an upper limit on accuracy.

[0031] In view of the above problems, the present invention provides a pressure sensor calibration device, which will be introduced in detail below.

[0032] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0037] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0038] The overall structure, working principle and technical effects of the pressure sensor calibration device provided by the present invention, as well as the detailed steps, implementation principle and technical effects of the corresponding calibration device operation method are described in detail below through embodiments and in combination with the accompanying drawings.

[0039] Please refer to Figure 1 , the pressure sensor calibration device provided by the present invention.

[0040] The pressure sensor calibration device includes a main body, a cover plate 2 and a detection device 6.

[0041] The main body 1 is provided with a cavity 101 , and the cavity 101 is used for placing the pressure sensor 3 .

[0042] The size and shape of the cavity 101 match the size and shape of the pressure sensor 3 , and the sidewall of the cavity 101 is in close contact with the side of the pressure sensor 3 .

[0043] The cover plate 2 is movably disposed on the main body 1 , and is used to seal the cavity 101 and apply pressure to the pressure sensor 3 placed in the cavity 101 .

[0044] The detection device 6 is electrically connected to the pressure sensor 3 placed in the cavity 101 , and is used to obtain pressure data and strain data of the pressure sensor 3 .

[0045] In the embodiment of the present invention, the pressure sensor 3 is placed in a closed environment through the cavity 101 of the main body 1 and the cover plate 2, thereby preventing the sensor from shifting during the calibration process, thereby improving the calibration accuracy.

[0046] By operating the cover plate 2, the cover plate 2 is connected to the pressure sensor 3 in the cavity 101 while sealing the cavity 101, thereby applying pressure to the pressure sensor 3. The detection device 6 detects the pressure data and strain data of the pressure sensor 3 in this process, and draws the pressure-time curve and the strain-time curve on its display screen.

[0047] Furthermore, if Figure 2 As shown, a groove 103 is provided on the side wall of the cavity 101 , and the groove 103 is used to place the signal transmission line of the pressure sensor 3 , and the signal transmission line is connected to the detection device 6 .

[0048] It can be understood that after the pressure sensor 3 is placed in the cavity 101 , its signal transmission line is placed on the side with the slot 103 and connected to the external detection device 6 .

[0049] Furthermore, the main body 1 is provided with a first connection portion 102, and the cover plate 2 is provided with a second connection portion 201, and the first connection portion 102 cooperates with the second connection portion 201 so that the cover plate 2 seals the cavity 101. After the cavity 101 is sealed by the cover plate 2, the second connection portion 201 is connected to the pressure sensor 3 placed in the cavity 101 to apply pressure to the pressure sensor 3.

[0050] The first connection part 102 can be arranged at the upper end of the cavity 101, and the second connection part 201 can be arranged at the lower end of the cover plate 2. The first connection part 102 cooperates with the second connection part 201 to tightly connect the cover plate 2 and the main body 1, so that the cavity 101 is sealed. The second connection part 201 enters the cavity 101 and connects with the pressure sensor 3 placed in the cavity 101, thereby applying pressure to the pressure sensor 3.

[0051] Optionally, the first connection part 102 and the second connection part 201 are threadedly matched, that is, the first connection part 102 is provided with threads, and the second connection part 201 is also provided with threads and adapted to the threads on the first connection part 102. By rotating the cover plate 2, the bottom surface of the second connection part 201 is closely attached to the surface of the pressure sensor 3, and pressure is applied to the pressure sensor 3.

[0052] Furthermore, if Figure 1As shown, the pressure sensor 3 calibration device further includes a pressure regulating member 5 , which is movably disposed on the cover plate 2 and is used to apply pressure to the pressure sensor 3 placed in the cavity 101 after the cavity 101 is sealed by the cover plate 2 .

[0053] After the cavity 101 is sealed by the cover plate 2, the bottom surface of the second connecting part 201 is in close contact with the surface of the pressure sensor 3, and a certain pressure is applied to the pressure sensor 3. In order to further apply pressure to the pressure sensor 3, a pressure regulating member 5 can be movably provided on the cover plate 2. By operating the pressure regulating member 5, pressure can continue to be applied to the pressure sensor 3 after the cavity 101 is sealed by the cover plate 2.

[0054] Alternatively, if Figure 3 As shown, the cover plate 2 may be provided with a through hole 203 , and the pressure regulating member 5 may be movably disposed in the through hole 203 and connected to the pressure sensor 3 placed in the cavity 101 to apply pressure to the pressure sensor 3 .

[0055] As a possible implementation, the side wall of the through hole 203 is provided with threads, and the pressure regulating member 5 is a bolt. It can be understood that the pressure sensor 3 is continuously applied with pressure by screwing in the bolt.

[0056] In an embodiment of the present invention, the threads on the first connecting portion 102 and the second connecting portion 201 may be coarser than the threads on the through hole 203 and the pressure adjusting member 5, that is, the second connecting portion 201 of the cover plate 2 can apply rough pressure to the pressure sensor 3 during the process of being screwed into the cavity 101, and then continuously fine-tune the pressure applied to the pressure sensor 3 by screwing in the pressure adjusting member 5.

[0057] Furthermore, the pressure sensor 3 calibration device further includes a buffer 4 , the shape and size of the buffer 4 are consistent with those of the pressure sensor 3 , and the buffer 4 is placed in the cavity 101 and located between the pressure sensor 3 and the cover plate 2 .

[0058] The cover plate 2 that applies pressure is separated from the pressure sensor 3 placed in the cavity 101 by a buffer member 4 whose shape and size are consistent with the pressure sensor 3. On the one hand, the pressure sensor 3 can be evenly stressed and the calibration accuracy can be improved. On the other hand, the pressure sensor 3 can be protected to avoid damage to the pressure sensor 3 during the process of applying pressure.

[0059] It can be understood that by rotating the cover plate 2, the cavity 101 is sealed and the pressure sensor 3 and the buffer member in the cavity 101 are pressed tightly, so that the pressure can be transmitted stably. Slowly rotate the cover plate 2 to a suitable position, apply a rough pressure to the pressure sensor 3, and then screw the bolt into the through hole 203 on the cover plate 2, and the bottom of the bolt is connected to the buffer member 4. Slowly rotate the bolt and fine-tune the pressure, and the pressure sensor 3 is applied with a stable pressure, thereby improving the accuracy of the sensor calibration.

[0060] Optionally, there are multiple pressure sensors 3 , and the number of buffer components 4 is the same as the number of pressure sensors 3 . The multiple pressure sensors 3 and the multiple buffer components 4 are alternately placed in the cavity 101 .

[0061] The multiple pressure sensors 3 are respectively multiple sensors to be calibrated and one calibrated sensor, and the detection device 6 includes a first device 601 and a second device 602; the first device 601 is electrically connected to each sensor to be calibrated, and is used to obtain the strain data of the sensor to be calibrated, and the second device 602 is electrically connected to the calibrated sensor, and is used to obtain the pressure data of the calibrated sensor.

[0062] For example, Figure 1 As shown, the number of the pressure sensors 3 may be two, the number of the buffer components 4 may be two, and the two pressure sensors 3 and the two buffer components 4 are alternately placed in the cavity 101 .

[0063] Furthermore, the two pressure sensors 3 are respectively a sensor to be calibrated and a calibrated sensor, and the detection device 6 includes a first device 601 and a second device 602; the first device 601 is electrically connected to the sensor to be calibrated, and is used to obtain strain data of the sensor to be calibrated, and the second device 602 is electrically connected to the calibrated sensor, and is used to obtain pressure data of the calibrated sensor.

[0064] It can be understood that a sensor to be calibrated, a calibrated sensor and two buffer members 4 are alternately placed in the cavity 101, and the cover plate 2 and the bolts on the cover plate 2 are rotated in sequence so that the calibrated sensor and the sensor to be calibrated are subjected to stable and identical forces. The first device 601 obtains the strain data of the sensor to be calibrated, and the second device 602 obtains the pressure data of the calibrated sensor.

[0065] The calibration is completed by drawing a sensor calibration curve using the strain data of the sensor to be calibrated and the pressure data of the calibrated sensor.

[0066] Furthermore, in an embodiment of the present invention, the requirements for simultaneous calibration of multiple sensors can be met by lengthening the cavity 101 and the number of tooling. That is, a calibrated sensor and multiple sensors to be calibrated can be placed in the cavity 101 and separated by the buffer 4, so that multiple sensors of the same model can be calibrated simultaneously.

[0067] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A pressure sensor calibration device, characterized in that: include: A main body (1), wherein the main body (1) is provided with a cavity (101) for accommodating a pressure sensor (3); a cover plate (2), the cover plate (2) being movably arranged on the main body (1) and used for sealing the cavity (101) and applying pressure to a pressure sensor (3) placed in the cavity (101); as well as A detection device (6), the detection device (6) being electrically connected to a pressure sensor (3) placed in the cavity (101) and being used to obtain pressure data and strain data of the pressure sensor (3).

2. The pressure sensor calibration device according to claim 1, characterized in that: The main body (1) is provided with a first connecting portion (102), and the cover plate (2) is provided with a second connecting portion (201), and the first connecting portion (102) cooperates with the second connecting portion (201) so that the cover plate (2) seals the cavity (101); After the cavity (101) is sealed by the cover plate (2), the second connection portion (201) is connected to a pressure sensor (3) placed in the cavity (101) to apply pressure to the pressure sensor (3).

3. The pressure sensor calibration device according to claim 2, characterized in that: The first connection portion (102) and the second connection portion (201) are threadedly matched.

4. The pressure sensor calibration device according to claim 1, characterized in that: The pressure sensor (3) calibration device further comprises a pressure regulating member (5), which is movably arranged on the cover plate (2) and is used to apply pressure to the pressure sensor (3) placed in the cavity (101) after the cavity (101) is sealed by the cover plate (2).

5. The pressure sensor calibration device according to claim 4, characterized in that: The cover plate (2) is provided with a through hole (203), and the pressure regulating member (5) is movably arranged in the through hole (203) and connected to the pressure sensor (3) placed in the cavity (101) to apply pressure to the pressure sensor (3).

6. The pressure sensor calibration device according to claim 5, characterized in that: The side wall of the through hole (203) is provided with threads, and the pressure regulating member (5) is a bolt.

7. The pressure sensor calibration device according to claim 1, characterized in that: A side wall of the cavity (101) is provided with a slot (103), and the slot (103) is used to place a signal transmission line of the pressure sensor (3), and the signal transmission line is connected to the detection device (6).

8. The pressure sensor calibration device according to claim 1, characterized in that: The pressure sensor (3) calibration device further comprises a buffer (4), the shape and size of the buffer (4) being consistent with those of the pressure sensor (3), and the buffer (4) being placed in the cavity (101) and located between the pressure sensor (3) and the cover plate (2).

9. The pressure sensor calibration device according to claim 8, characterized in that: The number of the pressure sensors (3) is multiple, the number of the buffer components (4) is the same as the number of the pressure sensors (3), and the multiple pressure sensors (3) and the multiple buffer components (4) are alternately placed in the cavity (101).

10. The pressure sensor calibration device according to claim 8, characterized in that: The multiple pressure sensors (3) are respectively multiple sensors to be calibrated and one calibrated sensor, and the detection device (6) comprises a first device (601) and a second device (602); the first device (601) is electrically connected to each of the sensors to be calibrated, and is used to obtain strain data of the sensors to be calibrated, and the second device (602) is electrically connected to the calibrated sensors, and is used to obtain pressure data of the calibrated sensors.

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