Pressure sensor calibration device

Abstract

The invention discloses a pressure sensor calibration device, and relates to the technical field of calibration devices.The pressure sensor calibration device comprises a device body, a pressure medium supply mechanism, a pressure detection piece and a calibration mechanism, the pressure medium supply mechanism is suitable for communicating with the pressure-resistant cavity to supply a pressure medium into the pressure-resistant cavity, the pressure detection piece is used for detecting the pressure of the pressure medium in the pressure medium supply mechanism, and the calibration mechanism is in communication connection with the pressure sensor; and the calibration mechanism is configured to calibrate the pressure sensor according to the detection information of the pressure sensor and the detection information of the pressure detection piece. Therefore, the calibration device can be used for calibrating the pressure sensor without a threaded interface, such as a Micro-Electrol-Memory System (microsystem) and a film type pressure sensor, so that the accuracy and the reliability of the pressure sensor in application are ensured.

Description

Technical Field

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

[0002] In the related art, the calibration of pressure sensors is a complex process involving multiple steps and multiple tools, which requires professional techniques and tools. The calibration of pressure sensors can ensure their accurate measurements, but most of the existing pressure sensor calibration devices are aimed at pressure sensors with traditional threaded interfaces and cannot be applied to new pressure sensors without threaded interfaces, such as Micro-Electro-Mechanical System (microsystem) and thin film pressure sensors. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a pressure sensor calibration device, which can calibrate pressure sensors without threaded interfaces, such as MEMS (microsystems) and thin-film pressure sensors, so as to ensure the accuracy and reliability of the pressure sensor in applications.

[0004] A pressure sensor calibration device according to an embodiment of the present invention includes: a device body, which defines a pressure-resistant chamber for installing a pressure sensor; a pressure medium supply mechanism, which is suitable for being connected to the pressure-resistant chamber to supply pressure medium into the pressure-resistant chamber; a pressure detection component, which is used to detect the pressure of the pressure medium in the pressure medium supply mechanism; and a calibration mechanism, which is communicatively connected to the pressure sensor and is configured to calibrate the pressure sensor according to detection information of the pressure sensor and detection information of the pressure detection component.

[0005] According to the pressure sensor calibration device of the embodiment of the present invention, a pressure-resistant chamber for installing a pressure sensor is defined in the device body, a pressure medium supply mechanism is suitable for being connected with the pressure-resistant chamber to supply pressure medium into the pressure-resistant chamber, a pressure detection component is used to detect the pressure of the pressure medium in the pressure medium supply mechanism, a calibration mechanism is communicatively connected with the pressure sensor, and the calibration mechanism is configured to calibrate the pressure sensor according to the detection information of the pressure sensor and the detection information of the pressure detection component. The calibration device can calibrate pressure sensors that do not have threaded interfaces, such as MEMS (microsystems) and thin film pressure sensors, thereby ensuring the accuracy and reliability of the pressure sensor in applications.

[0006] According to some embodiments of the present invention, the calibration mechanism includes: a signal converter and a controller, the signal converter is arranged in the device body and is used to communicate with the pressure sensor, the controller is communicatively connected to the signal converter, and the controller is configured to determine the detection information of the pressure sensor based on the conversion information of the signal converter, and calibrate the pressure sensor based on the detection information of the pressure detection device and the detection information of the pressure sensor.

[0007] According to some embodiments of the present invention, the device body is formed with a mounting wall, the surface of the mounting wall facing the pressure-resistant chamber is configured as a plane, and the surface of the mounting wall facing the pressure-resistant chamber is used to fix and install the pressure sensor.

[0008] According to some embodiments of the present invention, the device body includes: a device body and a cover body, the device body defines a medium storage space, the medium storage space has at least one opening, the cover body is detachably provided on the device body, and the cover body is covered on the opening to define a pressure-resistant cavity, and the cover body is constructed as a mounting wall.

[0009] According to some embodiments of the present invention, there are two openings, which are opposite to each other and spaced apart, and the cover body includes a first cover body and a second cover body, which are respectively disposed on the two openings.

[0010] According to some embodiments of the present invention, the device body also includes: a connecting plug, the device body is formed with a mounting hole connected to the pressure-resistant chamber, the connecting plug is assembled in the mounting hole, the connecting plug is connected to the signal converter and is used to connect to the pressure sensor.

[0011] According to some embodiments of the present invention, the connecting plug includes: a connecting column and a mounting portion, the mounting portion is arranged on the peripheral wall of the connecting column and fixed to the connecting column, the connecting column is inserted into the mounting hole, and the mounting portion is fixedly connected to the device body.

[0012] According to some embodiments of the present invention, the pressure medium supply mechanism forms a pressure medium supply flow path, the pressure medium supply flow path is suitable for communicating with the pressure-resistant cavity, and the pressure detection component is used to detect the pressure of the pressure medium in the pressure medium supply flow path.

[0013] According to some embodiments of the present invention, a pressure medium supply mechanism includes: a pressure medium storage element, a first base, a second base and a driving unit, the first base is connected in series between the pressure medium storage element and the second base to form a pressure medium supply flow path, the pressure detection element is a pressure gauge, the first base is selectively connected to the pressure detection element, the second base is selectively connected to the pressure-resistant chamber, and the driving unit is connected to the pressure medium storage element to drive the pressure medium in the pressure medium storage element to flow to the first base and the second base.

[0014] According to some embodiments of the present invention, the driving part includes: a shell and a piston, the shell defines a pressure regulating space, the piston is arranged in the pressure regulating space, the shell has an end wall opposite to the piston, the end wall is formed with a through hole connecting the pressure medium storage element and the pressure regulating space, and the piston is movable along the end wall and the piston arrangement direction.

[0015] According to some embodiments of the present invention, the driving part also includes: an operating part, the operating part is fixedly connected to the piston, the outer peripheral wall of the piston has a first threaded part, and the side wall of the outer shell opposite to the outer peripheral wall of the piston has a second threaded part connected to the first threaded part.

[0016] According to some embodiments of the present invention, the pressure medium storage element has a first interface, a second interface and a third interface, the first interface is a pressure medium inlet and is provided with an opening and closing valve, the second interface is connected to the first base, and the third interface is connected to the driving part.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic structural diagram of a pressure sensor calibration device according to an embodiment of the present invention;

[0020] Figure 2 It is a schematic structural diagram of the device body of an embodiment of the present invention.

[0021] Reference numerals:

[0022] Pressure sensor calibration device 100;

[0023] Device body 10; pressure-resistant chamber 11; installation wall 12;

[0024] Device body 13; mounting hole 131;

[0025] Cover body 14; first cover body 141; second cover body 142;

[0026] Medium storage space 15; open mouth 16;

[0027] Connecting plug 17; connecting column 171; mounting portion 172;

[0028] Mounting seat 18;

[0029] A pressure medium supply mechanism 20;

[0030] Pressure medium storage element 21; first interface 211; second interface 212; third interface 213; opening and closing valve 214;

[0031] First base 22; first valve body 221; fourth interface 222; fifth interface 223; sixth interface 224;

[0032] The second base 23; the second valve body 231; the seventh interface 232; the eighth interface 233;

[0033] Driving unit 24; housing 241; piston 242; operating unit 243; pressure regulating space 244;

[0034] Pressure detection member 30;

[0035] Calibration mechanism 40; signal converter 41;

[0036] Pressure sensor 50. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] Reference below Figure 1-Figure 2 The pressure sensor calibration device 100 according to an embodiment of the present invention is described, which can be used to calibrate new pressure sensors 50 such as EMS (micro system) and thin film pressure sensors.

[0039] like Figure 1-Figure 2 As shown, the pressure sensor calibration device 100 according to an embodiment of the present invention includes: a device body 10, the device body 10 defines a pressure-resistant chamber 11 for installing a pressure sensor 50; a pressure medium supply mechanism 20, the pressure medium supply mechanism 20 is suitable for being connected to the pressure-resistant chamber 11 to supply pressure medium into the pressure-resistant chamber 11; a pressure detection component 30, the pressure detection component 30 is used to detect the pressure of the pressure medium in the pressure medium supply mechanism 20; a calibration mechanism 40, the calibration mechanism 40 is communicatively connected with the pressure sensor 50, and the calibration mechanism 40 is configured to calibrate the pressure sensor 50 according to the detection information of the pressure sensor 50 and the detection information of the pressure detection component 30.

[0040] Among them, the device body 10 defines a pressure-resistant cavity 11 for installing the pressure sensor 50 to ensure that the pressure sensor 50 can work safely and accurately in various pressure environments. The pressure sensor 50 can be a new type of pressure sensor 50 such as EMS (microsystem), thin film pressure sensor, etc. As an example of the present application, the device body 10 can be constructed as a cylinder. The cylindrical structure has good pressure resistance and can withstand high-pressure environments. The cylindrical device body 10 can define a pressure-resistant cavity 11 with sufficient pressure resistance, thereby reducing the risk of leakage or rupture of the pressure-resistant cavity 11 under high-pressure conditions, thereby providing a stable and reliable pressure environment for the pressure sensor 50.

[0041] The pressure medium supply mechanism 20 is suitable for being connected with the pressure-resistant chamber 11. The pressure medium supply mechanism 20 and the pressure-resistant chamber 11 can be connected through a pipeline. The pressure medium supply mechanism 20 fills the pressure-resistant chamber 11 with pressure medium through the pipeline. The pressure medium can be a liquid pressure medium such as pressure oil or water. When the pressure medium enters the pressure-resistant chamber 11 and fills the pressure-resistant chamber 11, the pressure in the pressure-resistant chamber 11 can be adjusted according to the pressure of the pressure medium, so that the pressure sensor 50 in the pressure-resistant chamber 11 can generate different detection information.

[0042] The pressure detecting component 30 can be a standard pressure gauge. The pressure detecting component 30 is connected to the pressure medium supply mechanism 20 so that the pressure detecting component 30 can be used to detect the pressure of the pressure medium in the pressure medium supply mechanism 20. The pressure detecting component 30 can obtain standard pressure information of the pressure medium by detecting the pressure of the pressure medium. The pressure of the pressure medium can be adjusted so that the pressure detecting component 30 can obtain different standard pressure information.

[0043] The calibration mechanism 40 is communicatively connected to the pressure sensor 50 . The calibration mechanism 40 and the pressure sensor 50 may be communicatively connected via a wiring harness. The calibration mechanism 40 is configured to calibrate the pressure sensor 50 according to detection information of the pressure sensor 50 and detection information of the pressure detection member 30 . Specifically, the calibration mechanism 40 can convert the detection information of the pressure sensor 50 into a processable electrical signal and process and analyze it to obtain an output value corresponding to the detection information of the pressure sensor 50 (it can be explained that the detection information of the pressure sensor 50 is a pressure signal, and the output value corresponding to the detection information of the pressure sensor 50 can be an electrical signal. There is a standard control relationship between the output value and the detection information of the pressure sensor 50. For example, when the output value corresponding to the detection information of the pressure sensor 50 is 1mV, the corresponding detection information of the pressure sensor 50 is 1Pa). By adjusting the pressure of the pressure medium, the pressure detection component 30 can obtain multiple standard pressure detection information, and the pressure sensor 50 can obtain multiple detection information. The calibration mechanism 40 also gradually corrects the linearity between the processable electrical signal and the corresponding output value according to the detection information detected by the pressure detection component 30 and the corresponding processable electrical signal, so that the output value changes linearly within the pressure range, and the detection information of the pressure sensor 50 corresponding to the output value is consistent with the detection information of the pressure detection component 30, thereby completing the calibration of the pressure sensor 50.

[0044] Therefore, through the pressure sensor calibration device 100 of the present application, new pressure sensors 50 that do not have threaded interfaces, such as MEMS (microsystems) and thin film pressure sensors 50, can be calibrated, thereby ensuring the accuracy and reliability of the new pressure sensors 50 in applications.

[0045] According to the pressure sensor calibration device 100 of the embodiment of the present invention, a pressure-resistant chamber 11 for installing a pressure sensor 50 is defined in the device body 10, and the pressure medium supply mechanism 20 is suitable for being connected with the pressure-resistant chamber 11 to supply pressure medium into the pressure-resistant chamber 11, and the pressure detection component 30 is used to detect the pressure of the pressure medium in the pressure medium supply mechanism 20. The calibration mechanism 40 is communicated with the pressure sensor 50, and the calibration mechanism 40 is configured to calibrate the pressure sensor 50 according to the detection information of the pressure sensor 50 and the detection information of the pressure detection component 30. The calibration device can calibrate a new type of pressure sensor 50 that does not have a threaded interface, such as MEMS (microsystem) and thin film pressure sensor 50, so as to ensure the accuracy and reliability of the new pressure sensor 50 in the application.

[0046] According to some embodiments of the present invention, the calibration mechanism 40 may include: a signal converter 41 and a controller, the signal converter 41 is arranged in the device body 10 and is used to communicate with the pressure sensor 50, the controller and the signal converter 41 are communicatively connected, and the controller is configured to determine the detection information of the pressure sensor 50 based on the conversion information of the signal converter 41, and calibrate the pressure sensor 50 based on the detection information of the pressure detection component 30 and the detection information of the pressure sensor 50.

[0047] Among them, the signal converter 41 is arranged in the device body 10, for example: the signal converter 41 and the device body 10 can be connected by plugging, or the signal converter 41 and the device body 10 can be connected by a cable, but the present invention is not limited to this, the signal converter 41 and the device body 10 can also be connected by other means, as long as the signal converter 41 is arranged in the device body 10. And the signal converter 41 is used to communicate with the pressure sensor 50, for example: the signal converter 41 and the pressure sensor 50 can be connected by cable communication, or the signal converter 41 and the pressure sensor 50 can be connected by wireless communication. The controller and the signal converter 41 are connected in communication, for example: the signal converter 41 and the controller can be connected in communication through a cable, or the signal converter 41 and the controller can be connected in wireless communication.

[0048] The signal converter 41 is communicatively connected to the pressure sensor 50, and the controller is communicatively connected to the signal converter 41, and can convert the pressure signal (usually an analog signal) generated by the pressure sensor 50 into conversion information (electrical signal) that can be processed, transmitted, and analyzed by the controller. The controller is configured to determine the detection information of the pressure sensor 50 based on the conversion information of the signal converter 41. Specifically, the controller can derive an output value corresponding to the detection information of the pressure sensor 50 based on the conversion information and a preset algorithm or standard, and can determine the detection information of the pressure sensor 50 through a standard comparison relationship between the output value and the detection information of the pressure sensor 50.

[0049] The controller calibrates the pressure sensor 50 according to the detection information of the pressure detection component 30 and the detection information of the pressure sensor 50. Specifically, by adjusting the pressure of the pressure medium, the pressure detection component 30 can obtain multiple standard pressure detection information, and the pressure sensor 50 can obtain multiple detection information. The detection information of each pressure sensor 50 is converted into conversion information by the signal converter, and the controller processes the conversion information to obtain multiple output values ​​corresponding to the detection information of the pressure sensor 50. The controller can also gradually correct the linearity between the conversion information and the corresponding output value according to the detection information of the pressure detection component 30 and the corresponding conversion information, so that the output value changes linearly within the pressure range, and the detection information of the pressure sensor 50 corresponding to the output value is consistent with the detection information of the pressure detection component 30, thereby completing the calibration of the pressure sensor 50.

[0050] According to some embodiments of the present invention, Figure 2 As shown, the device body 10 may be formed with a mounting wall 12 , the surface of the mounting wall 12 facing the pressure-resistant chamber 11 is configured as a plane, and the surface of the mounting wall 12 facing the pressure-resistant chamber 11 is used to fix and mount the pressure sensor 50 .

[0051] Among them, the device body 10 can be formed with a mounting wall 12, and the surface of the mounting wall 12 facing the pressure-resistant chamber 11 can be constructed as a plane. The surface of the mounting wall 12 facing the pressure-resistant chamber 11 can be used to fix and install the pressure sensor 50. The planar mounting wall 12 helps to reduce the installation difficulty between the pressure sensor 50 and the mounting wall 12, and can also increase the contact area between the pressure sensor 50 and the mounting wall 12, thereby improving the connection strength between the pressure sensor 50 and the mounting wall 12, and further reducing the risk of the pressure sensor 50 falling off the mounting wall 12. It also helps to ensure that the contact between the pressure sensor 50 and the pressure medium in the pressure-resistant chamber 11 is uniform and consistent, thereby reducing the measurement error caused by poor contact, and further improving the accuracy and reliability of the pressure sensor calibration device 100.

[0052] According to some embodiments of the present invention, Figure 2 As shown, the device body 10 includes: a device body 13 and a cover body 14, the device body 13 defines a medium storage space 15, the medium storage space 15 has at least one opening 16, the cover body 14 is detachably provided on the device body 13, and the cover body 14 is covered on the opening 16 to define a pressure-resistant chamber 11, and the cover body 14 is constructed as a mounting wall 12.

[0053] The device body 10 may be constructed as a cylinder, and the device body 13 defines a medium storage space 15, and the medium storage space 15 has at least one open opening 16. For example, the medium storage space 15 has one, two, or other open openings 16, but the present invention is not limited thereto. The medium storage space 15 may also have other numbers of open openings 16, as long as the medium storage space 15 has at least one open opening 16. The cover 14 may be detachably disposed on the device body 13, for example, the cover 14 and the device body 13 may be fixedly connected by bolts, or the cover 14 and the device body 13 may be fixedly connected by snapping, but the present invention is not limited thereto. The cover 14 and the device body 13 may be fixedly connected by other means, as long as the cover 14 is detachably disposed on the device body 13. The cover 14 is disposed on the open opening 16 to seal the open opening 16 to define a sealed pressure-resistant chamber 11, and the cover 14 is configured as a mounting wall 12 for mounting the pressure sensor 50.

[0054] Specifically, when it is necessary to install the pressure sensor 50 in the pressure-resistant chamber 11, the cover body 14 can be removed from the device body 13, and the pressure sensor 50 can be installed on the surface of the cover body 14 facing the pressure-resistant chamber 11. For example, the pressure sensor 50 can be bonded to the installation wall 12 by an adhesive. After the pressure sensor 50 is installed, the cover body 14 is covered on the open opening 16 to seal the pressure-resistant chamber 11. After the pressure-resistant chamber 11 is sealed, a pressure medium is filled into the pressure-resistant chamber 11. The pressure in the pressure-resistant chamber 11 can be adjusted according to the pressure of the pressure medium, so that the pressure sensor 50 in the pressure-resistant chamber 11 can generate different detection information.

[0055] According to some embodiments of the present invention, Figure 2 As shown, there are two open openings 16 , which are opposite to each other and spaced apart. The cover 14 includes a first cover 141 and a second cover 142 , which are respectively disposed on the two open openings 16 .

[0056] Among them, the two open openings 16 are opposite and spaced apart, and the cover body 14 includes a first cover body 141 and a second cover body 142. The first cover body 141 and the second cover body 142 are respectively covered on the two open openings 16. The pressure sensor 50 can be installed on the surface of the first cover body 141 or the second cover body 142 facing the pressure-resistant chamber 11. The cover body 14 can be constructed as a bolted flange blind plate. The cover body 14 and the device body 13 are fixedly connected by bolts. The end surface where the device body 13 and the cover body 14 are connected can also have a groove. A sealing member, such as a fluororubber sealing ring, can be installed in the groove. The sealing member is clamped between the cover body 14 and the device body 13, which can further improve the sealing between the cover body 14 and the device body 13, and thus can further improve the sealing and reliability of the pressure-resistant chamber 11.

[0057] According to some embodiments of the present invention, Figure 2 As shown, the device body 10 may further include: a connecting plug 17 , the device body 13 is formed with a mounting hole 131 communicating with the pressure-resistant chamber 11 , the connecting plug 17 is assembled in the mounting hole 131 , the connecting plug 17 is connected to the signal converter 41 and is used to connect to the pressure sensor 50 .

[0058] The connection plug 17 and the device body 10 may be fixedly connected by bolts, or may be fixedly connected by welding, but the present invention is not limited thereto. The connection plug 17 and the device body 10 may also be fixedly connected by other means, as long as the connection plug 17 is provided on the device body 10. The device body 13 may be formed with a mounting hole 131 communicating with the pressure-resistant chamber 11, and the connection plug 17 is assembled in the mounting hole 131, so that the connection plug 17 can be connected to the pressure sensor 50 in the pressure-resistant chamber 11 through the mounting hole 131, and the portion of the connection plug 17 located outside the pressure-resistant chamber 11 can be connected to the signal converter 41. The connection plug 17 is connected to the signal converter 41 and is used to connect to the pressure sensor 50, and can transmit the pressure information of the pressure sensor 50 to the signal converter 41, thereby realizing the transmission and conversion of the signal, and the signal converter 41 converts the pressure information into a processable electrical signal for subsequent processing and analysis, so that the calibration mechanism 40 can perform the calibration work normally.

[0059] According to some embodiments of the present invention, Figure 2 As shown, the connecting plug 17 may include: a connecting column 171 and a mounting portion 172, the mounting portion 172 is arranged on the peripheral wall of the connecting column 171 and fixed to the connecting column 171, the connecting column 171 is inserted into the mounting hole 131, and the mounting portion 172 is fixedly connected to the device body 10.

[0060] The mounting portion 172 is disposed on the peripheral wall of the connecting column 171 and is fixed to the connecting column 171. For example, the mounting portion 172 and the connecting column 171 can be fixedly connected by welding, or the mounting portion 172 and the connecting column 171 can be integrally formed, but the present invention is not limited thereto. The mounting portion 172 and the connecting column 171 can also be fixedly connected by other means, as long as the mounting portion 172 is disposed on the peripheral wall of the connecting column 171 and is fixed to the connecting column 171. The connecting column 171 is inserted into the mounting hole 131, and the mounting hole 131 is connected to the pressure-resistant chamber 11, so that the portion of the connecting column 171 located in the pressure-resistant chamber 11 can be connected to the pressure sensor 50 for communication, and the portion of the connecting column 171 located outside the pressure-resistant chamber 11 can be connected to the signal converter 41 for communication, thereby realizing the communication connection between the pressure sensor 50 and the signal converter 41. It can be explained that the connecting plug 17 and the pressure sensor 50 can be connected to each other through a cable for communication, and the connecting plug 17 and the signal converter 41 can also be connected to each other through a cable for communication.

[0061] The mounting portion 172 is fixedly connected to the device body 10. As an example of the present application, the device body 10 may have a mounting seat 18, and the mounting portion 172 may be fixedly connected to the mounting seat 18 by bolts to achieve a fixed connection between the mounting portion 172 and the device body 10, thereby avoiding directly opening bolt holes on the device body 10, ensuring the sealing and reliability of the pressure-resistant chamber 11, and further effectively improving the accuracy and reliability of the pressure sensor calibration device 100.

[0062] According to some embodiments of the present invention, Figure 1 As shown, the pressure medium supply mechanism 20 may be formed with a pressure medium supply flow path, which is suitable for communicating with the pressure-resistant chamber 11, and the pressure detection element 30 is used to detect the pressure of the pressure medium in the pressure medium supply flow path.

[0063] Among them, the pressure medium supply path is connected to the pressure-resistant chamber 11, so that the pressure medium supply mechanism 20 can transport pressure medium into the pressure-resistant chamber 11 through the pressure medium supply path, and make the pressure medium apply pressure to the pressure sensor 50 in the pressure-resistant chamber 11. When the pressure medium fills the pressure-resistant chamber 11 and the entire pressure medium supply path, the pressure values ​​of the pressure medium in the pressure-resistant chamber 11 and the entire pressure medium supply path are consistent, and the pressure detection component 30 is used to detect the pressure of the pressure medium in the pressure medium supply path. In other words, the pressure detection component 30 is consistent with the pressure value received by the pressure sensor 50, and then the detection information of the pressure detection component 30 can be compared with the detection information of the pressure sensor 50, and correction can be made through the calibration mechanism 40 to realize the calibration of the pressure sensor 50.

[0064] According to some embodiments of the present invention, the pressure medium supply mechanism 20 may include: a pressure medium storage element 21, a first base 22, a second base 23 and a driving unit 24, the first base 22 is connected in series between the pressure medium storage element 21 and the second base 23 to form a pressure medium supply flow path, the pressure detection element 30 is a pressure gauge, the first base 22 is selectively connected to the pressure detection element 30, the second base 23 is selectively connected to the pressure-resistant chamber 11, and the driving unit 24 is connected to the pressure medium storage element 21 to drive the pressure medium in the pressure medium storage element 21 to flow to the first base 22 and the second base 23.

[0065] Among them, the pressure medium storage element 21 can be constructed as an oil replenishing base, the pressure medium storage element 21 can define a cavity, and the cavity is used to store pressure medium. The first base 22 and the second base 23 can both define a cavity and be used to store pressure medium. The first base 22 is connected in series between the pressure medium storage element 21 and the second base 23 to form a pressure medium flow path, so that the pressure medium can flow from the pressure medium storage element 21 to the first base 22 and the second base 23, thereby making the pressure inside the first base 22 and the second base 23 consistent.

[0066] The pressure detection component 30 can be a standard pressure gauge. By detecting the pressure of the pressure medium in the pressure medium flow path through the standard pressure gauge, the pressure value of the pressure medium can be obtained. The pressure value detected by the standard pressure gauge can be used as a standard pressure value to compare with the detection information of the pressure sensor 50.

[0067] The first base 22 is selectively connected to the pressure detecting component 30, and the second base 23 is selectively connected to the pressure-resistant chamber 11. Specifically, the first base 22 may have a fourth interface 222, a fifth interface 223, and a sixth interface 224. The fourth interface 222 is connected to the pressure medium storage component 21, and the fifth interface 223 is connected to the pressure detecting component 30. The fifth interface 223 may be provided with a first valve body 221, or the first valve body 221 is connected between the fifth interface 223 and the pressure detecting component 30. The first base 22 can be connected or disconnected with the pressure detecting component 30 by opening and closing the first valve body 221. The sixth interface 224 is connected to the second base 23, so that the pressure medium can flow from the pressure medium storage component 21 and the first base 22 to the second base 23. The second base 23 may have a seventh interface 232 and an eighth interface 233. The seventh interface 232 is connected to the first base 22 so that the pressure medium can flow from the pressure medium storage element 21 and the first base 22 to the second base 23. The eighth interface 233 is connected to the pressure-resistant chamber 11. The eighth interface 233 is provided with a second valve body 231, or the second valve body 231 is connected between the eighth interface 233 and the pressure-resistant chamber 11. The second base 23 can be connected or disconnected with the pressure-resistant chamber 11 by opening and closing the second valve body 231.

[0068] The driving part 24 and the pressure medium storage element 21 can be connected through a pipeline. The driving part 24 can drive the pressure medium in the pressure medium storage element 21 to flow to the first base 22 and the second base 23, and the first base 22 and the second base 23 are located in the same pressure medium flow path, so that the pressure of the first base 22 and the second base 23 is consistent, and the first valve body 221 is opened to connect the first base 22 with the pressure detection element 30, and the second valve body 231 is opened to connect the second base 23 with the pressure-resistant chamber 11, so that The pressure medium flows from the first base 22 to the pressure detecting component 30, and the pressure medium flows from the second base 23 to the pressure-resistant chamber 11, so that the pressure detecting component 30 and the pressure-resistant chamber 11 are located in the same pressure medium flow path, so that the pressure in the pressure detecting component 30 is consistent with the pressure in the pressure-resistant chamber 11, and then the detection information of the pressure detecting component 30 can be compared with the detection information of the pressure sensor 50, and the pressure sensor 50 can be pressure calibrated based on the detection information of the pressure detecting component 30 and the detection information of the pressure sensor 50.

[0069] It can be explained that the pressure detection member 30 is connected to the first base 22, and the pressure detection member 30 can be installed on the first base 22, so that the first base 22 provides stable support for the pressure detection member 30, prevents the pressure detection member 30 from being displaced or damaged due to vibration or external force during operation, and ensures the measurement accuracy of the pressure detection member 30. The pressure-resistant chamber 11 is connected to the second base 23, and the pressure-resistant chamber 11 can be installed on the second base 23, so that the second base 23 provides stable support for the pressure-resistant chamber 11, ensuring that the pressure-resistant chamber 11 will not be displaced due to gravity or internal pressure during operation. In addition, the pressure-resistant chamber 11 and the second base 23 can be connected by threads, which is convenient for the replacement and maintenance of the pressure-resistant chamber 11.

[0070] According to some embodiments of the present invention, Figure 1 As shown, the driving part 24 includes: a shell 241 and a piston 242, the shell 241 defines a pressure regulating space 244, the piston 242 is arranged in the pressure regulating space 244, the shell 241 has an end wall opposite to the piston 242, the end wall is formed with a through hole connecting the pressure medium storage element 21 and the pressure regulating space 244, and the piston 242 is movable along the end wall and the arrangement direction of the piston 242.

[0071] Among them, the shell 241 defines a pressure regulating space 244, the piston 242 is arranged in the pressure regulating space 244, the shell 241 has an end wall opposite to the piston 242, and the end wall is formed with a through hole connecting the pressure medium storage element 21 and the pressure regulating space 244, so that the pressure medium in the pressure medium storage element 21 can flow from the through hole to the pressure regulating space 244, and the piston 242 is movable along the end wall and the arrangement direction of the piston 242, so that the piston 242 can reciprocate in the pressure regulating space 244 along the arrangement direction of the end wall and the piston 242, thereby changing the volume and pressure of the pressure medium in the pressure regulating space 244 and in the pressure medium flow path, thereby achieving the purpose of regulating the pressure of the pressure medium.

[0072] Furthermore, the shell 241 can be made of metal or high-strength plastic material to ensure that the shell 241 has sufficient structural strength to withstand the pressure of the pressure medium inside the shell 241 and the influence of the external environment. The size and shape of the through hole can be reasonably set according to actual conditions to ensure the pressure regulation effect of the drive unit 24.

[0073] According to some embodiments of the present invention, Figure 1 As shown, the driving part 24 may also include: an operating part 243, the operating part 243 is fixedly connected to the piston 242, the outer peripheral wall of the piston 242 has a first threaded part, and the side wall of the outer shell 241 opposite to the outer peripheral wall of the piston 242 has a second threaded part connected to the first threaded part.

[0074] Among them, the operating part 243 is fixedly connected to the piston 242, for example: the operating part 243 and the piston 242 can be integrally formed, or the operating part 243 and the piston 242 can be fixedly connected by bonding, but the present invention is not limited to this, and the operating part 243 and the piston 242 can also be fixedly connected by other means, as long as the operating part 243 and the piston 242 are fixedly connected. By operating the operating part 243, the movement of the piston 242 can be controlled, and the volume and pressure of the pressure medium in the pressure regulating space 244 and the pressure medium flow path can be changed, so as to achieve the purpose of regulating the pressure of the pressure medium. The design of the operating part 243 can be diversified to meet different operating requirements. Furthermore, the operating part 243 can be constructed as a handle for manual operation, or the operating part 243 can also be constructed as a mechanical connector for connecting to an automatic control system, which is not specifically limited here, and can be reasonably selected and set according to actual needs.

[0075] The outer peripheral wall of the piston 242 may have a first threaded portion, and the side wall of the outer peripheral wall of the housing 241 opposite to the piston 242 has a second threaded portion connected to the first threaded portion. The first threaded portion and the second threaded portion cooperate to achieve a threaded connection between the piston 242 and the housing 241. By operating the operating portion 243 to move the piston 242 axially along the second threaded portion in the housing 241, the position of the piston 242 can be accurately controlled, thereby achieving accurate regulation of the pressure of the pressure medium. The threaded connection has good mechanical stability and sealing, which helps to prevent leakage of the pressure medium and maintain the stable operation of the drive unit 24, thereby helping to improve the stability and reliability of the pressure sensor calibration device 100. In addition, the threaded structure has good wear resistance and fatigue resistance, can withstand large loads and long-term use without being easily damaged, and can effectively extend the service life of the drive unit 24.

[0076] According to some embodiments of the present invention, Figure 1 As shown, the pressure medium storage element 21 may have a first interface 211 , a second interface 212 and a third interface 213 , the first interface 211 being a pressure medium inlet and provided with an on-off valve 214 , the second interface 212 being connected to the first base 22 , and the third interface 213 being connected to the driving part 24 .

[0077] Among them, the pressure medium storage element 21 can have a first interface 211, a second interface 212 and a third interface 213. The first interface 211 is the pressure medium inlet and is provided with an opening and closing valve 214. When it is necessary to fill the pressure medium into the pressure medium storage element 21, the opening and closing valve 214 is opened and the pressure medium is filled into the pressure medium storage element 21 through the first interface 211. After the pressure medium is filled, the opening and closing valve 214 is closed to make the pressure medium storage element 21 in a sealed state.

[0078] The second interface 212 is connected to the first base 22, and the third interface 213 is connected to the driving part 24. With this arrangement, the pressure medium storage element 21 can flow the pressure medium from the second interface 212 and the third interface 213 to the entire pressure sensor calibration device 100, thereby making the entire pressure sensor calibration device 100 at the same pressure.

[0079] Furthermore, the calibration steps of the pressure sensor calibration device 100 are as follows: when the pressure sensor calibration device 100 is not in use, the first valve body 221, the second valve body 231, and the on-off valve 214 are all closed. Before calibrating the pressure sensor 50, the pressure sensor calibration device 100 needs to be vented and filled with pressure medium. The venting and filling of the pressure medium are performed simultaneously. The on-off valve 214, the first valve body 221, and the second valve body 231 are all opened, and the pressure medium storage element 21 is filled with pressure medium through the first interface 211. The pressure medium can flow along the pressure medium supply flow path to the first base 22, the pressure detection element 30, the second base 23, and the pressure-resistant chamber 11. The pressure detection element 30 is connected to the pressure sensor 50, and the pressure medium is connected to the pressure sensor 50. Both the component 30 and the pressure-resistant chamber 11 may be provided with exhaust holes. During the filling process of the pressure medium, the gas in the pressure medium flow path can be discharged from the exhaust holes and the exhaust holes are sealed. When the pressure medium fills the entire pressure medium flow path, the on-off valve 214 is closed so that the entire pressure medium flow path is in a sealed state, so that the pressure of the entire pressure medium flow path is consistent, and then the pressure of the pressure detection component 30 and the pressure sensor 50 are consistent, but the detection information of the pressure sensor 50 may be consistent with the detection information of the pressure detection component 30 or inconsistent. When the detection information of the pressure sensor 50 is consistent with the detection information of the pressure detection component 30, the pressure detection of the pressure sensor 50 is accurate. When the detection information of the pressure sensor 50 is inconsistent with the detection information of the pressure detection component 30, the pressure detection of the pressure sensor 50 is inaccurate, and therefore, the pressure sensor 50 needs to be calibrated.

[0080] The signal converter 41 can convert the pressure signal (usually an analog signal) generated by the pressure sensor 50 into conversion information (electrical signal) that can be processed, transmitted, and analyzed by the controller. The controller determines the detection information of the pressure sensor 50 based on the conversion information of the signal converter 41. Specifically, the controller can derive the output value corresponding to the detection information of the pressure sensor 50 based on the conversion information and a preset algorithm or standard. The detection information of the pressure sensor 50 can be determined through the standard comparison relationship between the output value and the detection information of the pressure sensor 50.

[0081] By operating the operating part 243 to make the piston 242 move axially along the second threaded part in the shell 241, the position of the piston 242 can be accurately controlled, thereby realizing accurate adjustment of the pressure of the pressure medium, and then the pressure detection part 30 can obtain multiple standard pressure detection information, and the pressure sensor 50 can obtain multiple detection information. The multiple detection information of the pressure detection part 30 and the multiple detection information of the pressure sensor 50 correspond one to one. Each detection information of the pressure sensor 50 is converted into conversion information by the signal converter. The controller processes the conversion information and can obtain multiple output values ​​corresponding to the detection information of the pressure sensor 50. The controller can also gradually correct the linearity between the conversion information and the corresponding output value according to the detection information detected by the pressure detection part 30 and the corresponding conversion information, so that the output value changes linearly within the pressure range, and the detection information of the pressure sensor 50 corresponding to the output value is consistent with the detection information of the pressure detection part 30, thereby completing the calibration of the pressure sensor 50.

[0082] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0083] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pressure sensor calibration device, characterized in that: include: a device body, the device body defining a pressure-resistant cavity for mounting a pressure sensor; a pressure medium supply mechanism, the pressure medium supply mechanism being adapted to be in communication with the pressure-resistant chamber to supply pressure medium into the pressure-resistant chamber; A pressure detection member, the pressure detection member is used to detect the pressure of the pressure medium in the pressure medium supply mechanism; A calibration mechanism is communicatively connected to the pressure sensor, and is configured to calibrate the pressure sensor according to detection information of the pressure sensor and detection information of the pressure detection member.

2. The pressure sensor calibration device according to claim 1, characterized in that: The calibration mechanism includes: a signal converter and a controller, the signal converter is arranged in the device body and is used to communicate with the pressure sensor, the controller is communicatively connected to the signal converter, and the controller is configured to determine the detection information of the pressure sensor based on the conversion information of the signal converter, and calibrate the pressure sensor based on the detection information of the pressure detection part and the detection information of the pressure sensor.

3. The pressure sensor calibration device according to claim 2, characterized in that: The device body is formed with a mounting wall, a surface of the mounting wall facing the pressure-resistant chamber is configured as a plane, and the surface of the mounting wall facing the pressure-resistant chamber is used for fixing and mounting the pressure sensor.

4. The pressure sensor calibration device according to claim 3, characterized in that: The device body includes: a device body and a cover body, the device body defines a medium storage space, the medium storage space has at least one opening, the cover body is detachably provided on the device body, and the cover body is covered on the opening to define the pressure-resistant cavity, and the cover body is configured as the installation wall.

5. The pressure sensor calibration device according to claim 4, characterized in that: There are two open openings, which are opposite to each other and spaced apart. The cover body includes a first cover body and a second cover body, and the first cover body and the second cover body are respectively covered on the two open openings.

6. The pressure sensor calibration device according to claim 4, characterized in that: The device body further includes: a connecting plug, the device body is formed with a mounting hole communicating with the pressure-resistant chamber, the connecting plug is assembled in the mounting hole, the connecting plug is connected to the signal converter and is used to connect with the pressure sensor.

7. The pressure sensor calibration device according to claim 6, characterized in that: The connecting plug comprises: a connecting column and a mounting portion, wherein the mounting portion is arranged on the peripheral wall of the connecting column and fixed to the connecting column, the connecting column is inserted into the mounting hole, and the mounting portion is fixedly connected to the device body.

8. The pressure sensor calibration device according to any one of claims 1 to 7, characterized in that: The pressure medium supply mechanism forms a pressure medium supply flow path, the pressure medium supply flow path is suitable for communicating with the pressure-resistant chamber, and the pressure detection component is used to detect the pressure of the pressure medium in the pressure medium supply flow path.

9. The pressure sensor calibration device according to claim 8, characterized in that: The pressure medium supply mechanism includes: a pressure medium storage element, a first base, a second base and a driving unit, the first base is connected in series between the pressure medium storage element and the second base to form the pressure medium supply flow path, the pressure detection element is a pressure gauge, the first base is selectively connected to the pressure detection element, the second base is selectively connected to the pressure-resistant chamber, and the driving unit is connected to the pressure medium storage element to drive the pressure medium in the pressure medium storage element to flow to the first base and the second base.

10. The pressure sensor calibration device according to claim 9, characterized in that: The driving part includes: a shell and a piston, the shell defines a pressure regulating space, the piston is arranged in the pressure regulating space, the shell has an end wall opposite to the piston, the end wall is formed with a through hole connecting the pressure medium storage element and the pressure regulating space, and the piston is movable along the end wall and the piston arrangement direction.

11. The pressure sensor calibration device according to claim 10, characterized in that: The driving part further includes: an operating part, the operating part is fixedly connected to the piston, the outer peripheral wall of the piston has a first threaded part, and the side wall of the housing opposite to the outer peripheral wall of the piston has a second threaded part connected to the first threaded part.

12. The pressure sensor calibration device according to claim 9, characterized in that: The pressure medium storage element has a first interface, a second interface and a third interface. The first interface is a pressure medium inlet and is provided with an on-off valve. The second interface is connected to the first base. The third interface is connected to the driving part.

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