Calibration head design method and design system, and calibration system and calibration method

Abstract

The application relates to a calibration pressure head design method, a design system and a computer readable storage medium. The calibration pressure head design method comprises the following steps: acquiring parameter data of an installation structure of a bearing assembly and an elastic sealing piece, and generating a finite element model according to the parameter data; acquiring operation condition parameters of the elastic sealing piece installed to the installation structure; inputting the operation condition parameters into the finite element model for elastic deformation analysis to obtain corresponding stress surface parameters of the elastic sealing piece; and generating the calibration pressure head according to the stress surface parameters. In the application, a good foundation is provided for improving the calibration effect of a thin film pressure sensor.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pressure sensor calibration, in particular to a calibration head design method and design system, and a calibration system and calibration method. BACKGROUND

[0002] At present, many products have increased the setting of elastic sealing elements to improve the waterproof and dustproof effect of the products. However, due to the aging and hardening of the elastic sealing elements to a certain extent with the change of use time and use environment, the sealing effect of the elastic sealing elements is poor. Based on this, many manufacturers use the way of setting a thin film pressure sensor on the elastic sealing element to detect the sealing performance of the elastic sealing element. Before the thin film pressure sensor is put into the sealing structure, the thin film pressure sensor needs to be calibrated first.

[0003] In the related art, the pressure head used for calibrating the thin film pressure sensor mostly adopts a pressure head similar to the area of the elastic sealing element to simulate the actual stress area of the elastic sealing element. However, in the actual use process, since the elastic sealing element has a certain elastic effect, when receiving different degrees of pressure, the elastic sealing element will deform differently, so that the stress area of the elastic sealing element will change. For example, when the elastic sealing element gradually abuts and cooperates with the bearing assembly to be cooperated, the contact surface of the elastic sealing element and the bearing assembly gradually changes from a line to a stress surface, and with the increase of the extrusion degree, the stress surface of the elastic sealing element is larger.

[0004] Therefore, the elastic sealing element is not used for stress in the whole area, so that in the related art, the pressure head similar to the area of the elastic sealing element is directly used to simulate the actual stress area of the elastic sealing element, which will cause distortion of simulation and deviation of the calibration pressure curve when the calibration pressure head is pressed on the thin film pressure sensor, which is not conducive to improving the calibration accuracy of the thin film pressure sensor. SUMMARY

[0005] Therefore, it is necessary to provide a calibration head design method, a design system, and a computer readable storage medium for the problem of inaccurate calibration of the thin film pressure sensor in the related art.

[0006] A calibration head design method, the calibration head is used for calibrating a thin film pressure sensor, the thin film pressure sensor is used for measuring the sealing performance of an elastic sealing element; at least one of a first body and a second body of a bearing assembly is provided with a mounting groove, and the first body and the second body surround to form a mounting structure, the elastic sealing element and the thin film pressure sensor are sealingly arranged in the mounting structure, and the thin film pressure sensor and the elastic sealing element are abutted and cooperated, the calibration head design method comprises:

[0007] Obtain parameter data of the mounting structure of the load-bearing component, the elastic seal, and the diaphragm pressure sensor, and generate a finite element model based on the parameter data;

[0008] Obtain the operating parameters of the elastic seal when it is installed in the mounting structure;

[0009] The operating condition parameters are input into the finite element model for elastic deformation analysis to obtain the force surface parameters of the thin film pressure sensor pressing against the elastic seal.

[0010] The calibration pressure head is generated based on the force-bearing surface parameters.

[0011] In one embodiment, the parameter data includes three-dimensional structural parameters and material characteristic parameters.

[0012] In one embodiment, the force-bearing surface parameters include at least one of the force-bearing surface shape and the force-bearing surface area.

[0013] In one embodiment, the operating condition parameters include at least one of the external load parameters applied to the bearing component and the installation distance parameters between the first body and the second body.

[0014] In one embodiment, the step of inputting the operating condition parameters into the finite element model for elastic deformation analysis to obtain the corresponding stress surface parameters of the elastic seal includes:

[0015] The operating condition parameters include external load parameters;

[0016] The external load parameters are input into the finite element model for elastic deformation analysis to obtain the force-bearing surface parameters.

[0017] In one embodiment, the step of inputting the operating condition parameters into the finite element model for elastic deformation analysis to obtain the corresponding stress surface parameters of the elastic seal includes:

[0018] The operating condition parameters are input into the finite element model for elastic deformation analysis to obtain the compression parameters of the elastic seal corresponding to the operating condition.

[0019] The force-bearing surface parameters of the elastic seal are obtained based on the compression parameters.

[0020] In one embodiment, the operating conditions include installation distance parameters;

[0021] The step of inputting the operating condition parameters into the finite element model for elastic deformation analysis to obtain the compression parameters of the elastic seal corresponding to the operating condition includes:

[0022] The installation distance parameter is input into the finite element model, and the compression parameter is calculated based on the installation distance parameter.

[0023] A design system for calibrating pressure heads, comprising:

[0024] The generation module is used to acquire parameter data of the mounting structure of the load-bearing components, the elastic seals, and the diaphragm pressure sensor, and to generate a finite element model based on the parameter data;

[0025] The processing module is used to obtain the operating condition parameters of the elastic seal when it is installed in the mounting structure;

[0026] The analysis module is used to input the operating condition parameters into the finite element model for elastic force analysis, so as to obtain the force surface parameters of the thin film pressure sensor pressing against the elastic seal.

[0027] A manufacturing module is used to design the calibration pressure head based on the force-bearing surface parameters.

[0028] A calibration system for a thin-film pressure sensor, comprising:

[0029] The calibration head is the calibration head prepared by the calibration head design method in the above embodiments;

[0030] A pressure output component is used to press the calibration head successively with multiple preset pressure values, so that pressure is output through the calibration head to the pressure sensor to be calibrated.

[0031] A pressure sensing element is electrically connected to the pressure sensor to be calibrated. The pressure sensing element is used to acquire multiple piezoelectric signals that correspond one-to-one with the multiple preset pressure values.

[0032] The data processing module is used to accept multiple preset pressure values ​​and multiple piezoelectric signals, and the data processing module is used to establish a calibration curve model of the thin film pressure sensor to be calibrated based on the preset pressure values ​​and the piezoelectric signals.

[0033] A calibration method for a thin-film pressure sensor, the calibration method comprising:

[0034] The pressure output component presses against the calibration head successively with multiple preset pressure values, so that the thin-film pressure sensor to be calibrated is pressed multiple times through the calibration head; the calibration head is the calibration head prepared by the calibration head design method;

[0035] The pressure detection element acquires multiple piezoelectric signals that correspond one-to-one with the multiple preset pressure values;

[0036] A calibration curve model for the thin-film pressure sensor to be calibrated is established based on multiple preset pressure values ​​and multiple pressure point signals.

[0037] The above-described calibration head design method and system, as well as calibration system and method, are described. The calibration head design method obtains a corresponding finite element model based on the installation structure and elastic seal parameter information. Furthermore, by acquiring the operating condition parameters, the installation status of the installation structure and elastic seal can be obtained, leading to the actual compression of the elastic seal corresponding to that operating condition. In other words, after inputting the operating condition into the finite element model, the actual stress distribution and magnitude of the elastic seal's surface can be obtained, thus acquiring the stress surface parameters of the elastic seal. The calibration head designed using this method better reflects the actual usage of the elastic seal, resulting in a more concentrated and precise stress distribution on the elastic seal. Correspondingly, using a calibration head made from this actual stress area for calibration improves the calibration accuracy of the thin-film pressure sensor, facilitating further improvements in the detection accuracy of the thin-film pressure sensor for elastic seals. Attached Figure Description

[0038] Figure 1 This is a cross-sectional view of the installation structure of the load-bearing component and the elastic seal in one embodiment.

[0039] Figure 2 This is a schematic diagram of a calibration system for a thin-film pressure sensor in one embodiment.

[0040] Figure 3 This is a flowchart illustrating a design method for calibrating the pressure head in one embodiment.

[0041] Figure 4 This is a schematic flowchart of a calibration method for a thin-film pressure sensor shown in one embodiment.

[0042] Figure 5 This is a cross-sectional view of the mounting structure of the load-bearing component and the elastic seal in another embodiment.

[0043] Figure 6 This is a flowchart illustrating step S21 in one embodiment.

[0044] Figure 7 This is a schematic diagram of the design system structure of the calibration pressure head shown in one embodiment.

[0045] Explanation of reference numerals in the attached figures:

[0046] 10. Calibration head design system; 11. Generation module; 12. Processing module; 13. Analysis module; 14. Manufacturing module; 100. Bearing component; 100a. Mounting groove; 110. First body; 120. Second body; 200. Elastic seal; 20. Calibration system for diaphragm pressure sensor; 21. Calibration head; 22. Pressure output component; 23. Pressure detection component; 24. Data processing module. Detailed Implementation

[0047] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0048] Generally, a thin-film pressure sensor consists of two thin polymer film layers, with horizontal and vertical wires printed on the inner surfaces of each layer. The intersections of the horizontal and vertical wires are composed of a special sensitive material, and multiple intersections form a pressure-sensitive area. When an external force is applied to the sensitive area, the electrical properties of the sensitive material change systematically with the change in external force. By collecting the changes in the electrical signal of the sensitive material, the external force can be monitored.

[0049] Currently, the common calibration technique is the quantitative pressure calibration method. This involves applying a calibration pressure head to the thin-film pressure sensor and outputting multiple preset directional pressures to the sensitive area. The corresponding resistance or current values ​​of the thin-film pressure sensor are then recorded to obtain its calibration pressure curve. The calibration pressure head is used to calibrate the thin-film pressure sensor, which in turn measures the sealing performance of the elastic seal 200.

[0050] like Figure 1 As shown, at least one of the first body 110 and the second body 120 of the support component 100 is provided with a mounting groove 100a, and the first body 110 and the second body 120 surround to form a mounting structure, with an elastic seal 200 sealingly disposed in the mounting structure. (Alternatively, the first body 110 and the second body 120 may abut against each other and surround to form a completely closed mounting groove 100a cavity, or the first body 110 and the second body 120 may be spaced apart and sealed together by the elastic seal 200). The elastic seal is sealed to the mounting structure with a diaphragm pressure sensor, and the diaphragm pressure sensor abuts against the elastic seal. Figure 1 As shown, the thin-film pressure sensor can be disposed between the seal and the first body 110, or disposed between the second body 120 and the seal.

[0051] like Figure 2 As shown, this application provides a calibration system 20 for a thin-film pressure sensor.

[0052] The calibration system 20 for the thin-film pressure sensor includes: a calibration head 21, a pressure output component 22, a pressure detection component 23, and a data processing module 24.

[0053] To facilitate understanding, the design method of the calibration head 21 will be explained below.

[0054] like Figure 3 As shown, the calibration head design method provided in this application includes:

[0055] S1. Obtain parameter data of the mounting structure of the bearing component 100, the elastic seal 200, and the diaphragm pressure sensor, and generate a finite element model based on the parameter data.

[0056] A finite element model is a model created using FEA (Finite Element Analysis). FEA uses mathematical approximations to simulate real physical systems, such as their geometry and load conditions.

[0057] The mounting structure on the support component 100 (which may be a mounting groove 100a, a protrusion, etc.) allows the elastic seal 200 to be sealed and installed onto the mounting structure through limiting engagement, limiting sleeve, or other methods. In one embodiment, the parameter data includes three-dimensional structural parameters and material characteristic parameters. The three-dimensional structural parameters refer to the three-dimensional structural data of the mounting structure, the elastic seal 200, and the thin-film pressure sensor. The material characteristic parameters may be the material hardness parameters of the support component 100 itself and the elastic characteristic parameters of the material of the elastic seal 200, etc.

[0058] The parameter data can be obtained through user input, or by retrieving the model of the bearing component 100 and the elastic seal 200 that match the shape from the database through shape matching, and assembling them to generate the corresponding finite element model, so as to perform geometric and elastic stress analysis on the elastic seal 200 in the future.

[0059] S2. Obtain the operating parameters of the elastic seal 200 installed in the mounting structure.

[0060] The operating condition parameters represent the installation status of the elastic seal 200 assembled onto the mounting structure, and are related to the area and shape of the force-bearing surface of the elastic seal 200.

[0061] S3. Input the operating condition parameters into the finite element model for elastic deformation analysis to obtain the force surface parameters of the membrane pressure sensor pressing against the elastic seal 200.

[0062] The force-bearing surface parameters may include at least one of the force-bearing surface shape and force-bearing surface area, which can be selected according to the actual application. In one example, the force-bearing surface parameters include the force-bearing surface shape and force-bearing surface area to improve the realism of the calibration head's simulation of the actual elastic seal 200's force-bearing surface, which is beneficial to improving the calibration accuracy of the diaphragm pressure sensor.

[0063] S4. Generate the calibration pressure head based on the force surface parameters.

[0064] Thus, this application can obtain the corresponding finite element model through the installation structure and the parameter information of the elastic seal 200. Furthermore, by obtaining the operating condition parameters, the installation status of the installation structure and the elastic seal 200 can be obtained, and the actual compression of the elastic seal 200 corresponding to this operating condition can be obtained from the installation status. That is, after inputting the operating condition into the finite element model, the actual stress distribution and magnitude of the elastic seal 200 can be obtained, thus acquiring the stress surface parameters of the elastic seal 200 at this time. The calibration head designed using this method better matches the actual usage of the elastic seal 200, making the stress distribution surface applied to the elastic seal 200 more concentrated and precise. Correspondingly, when calibrating using the calibration head made from this actual stress area, the calibration accuracy of the thin-film pressure sensor can be improved, facilitating better subsequent improvement of the detection accuracy of the thin-film pressure sensor in detecting the elastic seal 200.

[0065] Specifically, referring to the calibration head 21 in the above embodiments. Wherein, as Figure 4 As shown, the calibration system 20 for the thin-film pressure sensor can be used to implement the calibration method for the thin-film pressure sensor.

[0066] Specifically, the calibration method for a thin-film pressure sensor may include:

[0067] T1, the pressure output component 22 successively presses against the calibration pressure head 21 with multiple preset pressure values, so that pressure is output through the calibration pressure head to the pressure sensor to be calibrated.

[0068] The calibration head can be obtained through steps S1 to S4 in the above embodiments. In this way, the calibrating head 21 can be used to press the thin-film pressure sensor to be calibrated multiple times, so that the thin-film pressure sensor to be calibrated outputs a different pressure in each press.

[0069] T2, the pressure detection element acquires multiple piezoelectric signals that correspond one-to-one with multiple preset pressure values.

[0070] T3. Establish a calibration curve model for the thin-film pressure sensor to be calibrated based on multiple preset pressure values ​​and multiple pressure point signals.

[0071] Step T3 can be calculated by the data processing module 24, and the preset pressure value and electrical signal data can be manually input into the data processing module 24, or they can be transmitted through a communication connection (i.e., the communication connection between the data processing module 24 and at least one of the pressure output device 22 and the pressure detection device 23 is realized).

[0072] Thus, by calibrating the diaphragm pressure sensor using the calibration head 21 in the above embodiment, the stress-bearing surface of the diaphragm pressure sensor can be made to better match the actual stress-bearing surface of the seal under actual operating conditions. Based on this, performing multiple pressure calibration tests on this specific stress-bearing surface better matches the testing environment of the diaphragm pressure sensor when testing the seal, thereby improving the calibration accuracy of the diaphragm pressure sensor and thus improving the testing accuracy of the sealing performance of the seal using this calibrated diaphragm pressure sensor.

[0073] To facilitate understanding, the design method of calibrating pressure head 21 in an implementation scenario will be explained below.

[0074] Combination Figure 1 As shown, the first body 110 is provided with a mounting groove 100a, and the second body 120 is press-fitted with the first body 110 by pressing against the elastic seal 200. In related technologies, in order to detect the sealing performance of the elastic seal 200, a thin-film pressure sensor is provided between the second body 120 and the elastic seal 200. This thin-film pressure sensor can be calibrated using the calibration method of the thin-film pressure sensor in this application. In this process, the calibration pressure head 21 can be designed using the design method of the calibration pressure head 21. Details are as follows.

[0075] Q1: Establish as follows Figure 1 The finite element analysis model of the mounting structure of the carrier assembly 100 containing the thin-film pressure sensor is shown. This process allows for the determination of structural features of the mounting structure and the seals, including the gap between the first body 110 and the second body 120, the depth of the mounting groove 100a, the original length of the elastic seal 200, the material characteristics of the elastic seal 200, and the three-dimensional features of the thin-film pressure sensor, thus forming a geometric model of these areas regarding the mounting structure, the elastic seal 200, and the assembly and mating of the thin-film pressure sensor.

[0076] Q2: Based on the operating conditions of the bearing component 100 (such as the fit clearance between the first body 110 and the second body 120, or the stress applied to the second body 120), calculate the force-bearing surface parameters of the thin-film pressure sensor and the sealing ring in the sealing groove under the operating conditions, including at least one of the shape of the contact surface and the contact area, and design and manufacture the corresponding conversion connector.

[0077] Q3: The membrane pressure sensor to be calibrated is calibrated point by point using different adapters through the pressure output component 22 (such as a digital tension / compression gauge or electronic pressure gauge), and the pressure detection component 23 (such as a multimeter or voltmeter) obtains the pressure point signal at this time to obtain the characteristic curve of the membrane pressure sensor under the operating conditions.

[0078] In one embodiment, the operating condition parameters include external load parameters applied to the bearing component 100 and installation distance parameters between the first body 1101 and the second body 120.

[0079] It should be noted that the applied load parameter refers to the magnitude of the stress applied to the elastic seal 200. Within certain limits, the greater the stress, the greater the compression of the elastic seal 200, thereby increasing the stress contact area of ​​the elastic seal 200. The mounting groove 100a depth parameter refers to the depth of the mounting groove 100a. The mounting distance parameter refers to the relative distance between the first body 110 and the second body 120 when the first body 110 or the second body 120 presses against the elastic seal 200.

[0080] In one embodiment, the parameters of the stressed surface can be related to the parameters of the applied load. Step S3 includes:

[0081] S310. Input the external load parameters into the finite element model to perform elastic deformation analysis in order to obtain the parameters of the stressed surface.

[0082] To facilitate understanding, the design method of calibration pressure head will be explained below with some example scenarios.

[0083] See one example. Figure 5 As shown, the elastic seal 200 is a sealing ring, and the first body 110 is inserted into the sealing ring so that the first body 110 is sealed to the second body 120 through the sealing ring (similar to the fit between a bottle neck and a bottle stopper). The stress concentration of the sealing ring is distributed to the side wall of the sealing sleeve near the first body 110 and the side wall of the sealing sleeve near the second body 120.

[0084] Based on this, the operating conditions can include operating conditions with applied load parameters. These applied load parameters are related to the frictional force and frictional area of ​​the sidewalls of the first body 110 and the sealing sleeve. Furthermore, by inputting these applied load parameters into the finite element model, the actual force-bearing surface parameters of the sealing sleeve's sidewall in contact with the first body 110 and the second body 120 can be obtained through analysis. That is, in this example, the force-bearing surface parameters of the sidewall of the elastic seal 200 can be obtained through applied load parameters.

[0085] In another embodiment, step S3 may include:

[0086] S320. Input the operating condition parameters into the finite element model to perform elastic deformation analysis, so as to obtain the compression parameters of the elastic seal 200 corresponding to the operating condition, and obtain the corresponding force surface parameters of the elastic seal 200 based on the compression parameters.

[0087] In other words, in this embodiment, the compression parameter is obtained through a first correspondence between the operating condition parameters and the compression parameter, and then the force surface parameter is obtained based on a second correspondence between the compression parameter and the force surface parameter. The information of the operating condition parameters and the force surface parameter is obtained through the transformation of these two correspondences. This helps reduce the computational difficulty and simplify the calculation steps, thereby improving the efficiency of calibrating the pressure head.

[0088] The operating condition at this time can be at least one of the following: external load parameter, installation slot 100a depth parameter, and installation distance parameter of bearing component 100.

[0089] It should be noted that the compression parameters obtained from the operating conditions at this time can be obtained through the correspondence between the external load parameters and the compression parameters, or through the correspondence between the installation distance parameters and the compression parameters.

[0090] In one embodiment, the operating conditions include an installation distance parameter. This installation distance parameter is related to the distance between the first body 110 and the second body 120.

[0091] Based on this, in some embodiments, step S320 may include:

[0092] S321. Input the installation distance parameters into the finite element model.

[0093] S322. The compression parameter is calculated based on the installation distance parameter.

[0094] To facilitate understanding, the installation distance parameter is explained below with some examples.

[0095] In one specific embodiment, the second body 120 has a second surface, and the first surface and the second surface are arranged facing each other. A mounting groove 100a is disposed on either the first surface or the second surface. An elastic seal 200 is positioned and limited within the mounting groove 100a. Assuming the distance between the first surface and the second surface is a first gap X1, the depth of the mounting groove 100a is X2, the installation distance parameter is P1, and the initial height of the elastic seal 200 is Y1. In one example,

[0096] P1 = a1*[Y1-(X1+X2)]+b1…………(1).

[0097] Where a1≠0, a1 is the first coefficient for calculating the correction, and b1 is the second coefficient for calculating the correction.

[0098] In another specific embodiment, the first body 110 is provided with a first groove, the second body 120 is provided with a second groove, the first body 110 is provided with a first surface, and the second body 120 is provided with a second surface, with the first surface and the second surface facing each other. The first groove is recessed into the first surface, and the second groove is recessed into the second surface. Assuming the distance between the first surface and the second surface is a second gap X3, the depth of the first groove is X4, the depth of the second groove is X5, the installation distance parameter is P2, and the initial height of the elastic seal 200 is Y2.

[0099] In another example, P2 = a2*[Y2-(X3+X4+X5)]+b2………(2).

[0100] Where a2≠0, a2 is the third coefficient for calculation correction, and b2 is the fourth coefficient for calculation correction.

[0101] In other words, the installation distance parameter is related to the depth parameter of the installation structure. Of course, it is understandable that the installation distance parameter can be defined differently in different application scenarios based on the above principle. For example, the installation distance parameter could be the gap between the first and second surfaces. In this case, the depth parameter of the installation groove 100a can be calculated using a finite element model to calculate the installation distance parameter in conjunction with it. Alternatively, the depth parameter of the entire installation structure can be directly obtained as the installation distance parameter, in which case it is not necessary to use a finite element model to obtain the depth parameter of the installation groove 100a, and so on. Those skilled in the art can make various variations and calculation formulas for the installation structure parameters based on the above principle; therefore, no further restrictions are imposed here.

[0102] In other words, the installation distance parameter determines the maximum compression of the elastic seal 200 when it is installed on the mounting structure. When the elastic seal 200 reaches its maximum compression, no increase in stress due to an increase in the applied load parameter will affect the maximum compression of the elastic seal 200, nor will it affect the stress contact area of ​​the elastic seal 200 at this point. At this point, the maximum compression determines the stress contact area of ​​the elastic seal 200. Therefore, calculating the stress surface parameters using the installation distance parameter, unlike calculating them using the applied load parameter, improves the accuracy of the calculated stress surface parameters and simplifies the calculation, thus improving the efficiency of generating the calibration pressure head.

[0103] Furthermore, unlike the relationship between the applied load parameter and the compression parameter in the finite element model based on the input applied load parameter, the compression parameter is obtained by using the installation distance parameter. That is, it can be obtained through the correspondence between the installation distance parameter and the compression parameter in the finite element model. The calculation is simpler and more convenient, without involving too much mechanical analysis and mechanical calculation. This helps to reduce the requirements on the algorithm and computing power of the calibration system and improve the calculation speed.

[0104] Furthermore, in one embodiment, such as Figure 6 As shown, step S320 further includes:

[0105] S3211. Input the installation distance parameter into the finite element model. The installation distance parameter can be the gap distance between the first and second surfaces, or the depth distance of the installation structure.

[0106] S3222. Determine whether the installation distance parameter is less than or equal to the preset value. The preset value can be 0mm, 1mm, etc.

[0107] When the installation distance parameter is less than or equal to the preset value, the finite element model calculates the depth parameter of the installation groove 100a and uses the depth of the installation groove 100a as the force-bearing surface parameter.

[0108] When the installation distance parameter is greater than the preset value, the finite element model calculates the depth parameter of the installation groove 100a, and calculates the force surface parameter based on the installation distance parameter and the depth parameter of the installation groove 100a.

[0109] Thus, generally speaking, since the depth of the installation slot 100s can be known from the three-dimensional features and the data is relatively easy to obtain, the calculation scenario can be divided by judging the installation distance parameter. It is not necessary to substitute them into the same calculation model as the above formula (1) or (2) to verify the calculation, which is beneficial to improve the calculation efficiency of specific calculation scenarios.

[0110] The operating parameters in the above embodiments may also include external load parameters and installation distance parameters, which can be adapted to other structural support components 100. Specifically, in one example, at least one of the first body 110 and the second body 120 is made of a soft material (such as silicone, rubber, etc.), making the groove wall of the mounting groove 100a deformable. When the external load parameter is received, it will cause the mounting groove 100a and the seal to deform synchronously. At this time, the external load parameter and the installation distance parameter can be input into the finite element model to accurately analyze the stress-bearing area of ​​the seal, thereby improving the specified accuracy of the calibration head. This makes the calibration head more consistent with the actual operating conditions of the support component 100, thereby improving the calibration accuracy of the thin-film pressure sensor and providing good detection conditions for the subsequent detection of the sealing performance of the elastic seal 200 by the thin-film pressure sensor.

[0111] Accordingly, in the above embodiments, different calibration heads can be specified under different operating conditions to obtain multiple diaphragm pressure sensor calibration curves, thereby providing a large amount of data support for subsequent diaphragm pressure sensor testing of the sealing performance of the sealing component.

[0112] In one example, the calibration head design method also includes:

[0113] S201. Obtain the first operating condition parameters and the second operating condition parameters of the elastic seal 200 installed on the mounting head.

[0114] S301. Input the first operating condition parameters into the finite element model for elastic stress analysis to obtain the first stress surface parameters of the elastic seal 200. Input the second operating condition parameters into the finite element model for elastic stress analysis to obtain the second stress surface parameters of the elastic seal 200.

[0115] S401. Design at least two different calibration heads based on the parameters of the first and second force surfaces.

[0116] This application provides a design system for calibrating pressure heads to implement the design method for calibrating pressure heads in the above embodiments.

[0117] Specifically, the calibration head design system includes a generation module 11, a processing module 12, an analysis module 13, and a manufacturing module 14.

[0118] The generation module 11 is used to acquire parameter data of the installation structure elastic seal 200 of the bearing component 100 and the thin film pressure sensor, and generate a finite element model based on the parameter data.

[0119] The processing module 12 is used to acquire the operating condition parameters of the elastic seal 200 installed on the mounting structure. In one example, the processing module 12 can be an input module, used to receive operating condition parameters input by the user. In another example, the processing module 12 can be a measurement module, used to measure the installation distance of the support component 100, so as to use the installation distance as the operating condition parameter.

[0120] Analysis module 13 is used to input operating condition parameters into the finite element model for elastic deformation analysis, so as to obtain the force surface parameters of the membrane pressure sensor pressing against the elastic seal 200.

[0121] The fabrication module 14 is used to generate a calibrated indenter based on the parameters of the stress surface. The fabrication module 14 can be a metal casting device or a 3D printer, etc.

[0122] The analysis module 13 in the above embodiments can also be communicatively connected to the generation module 11 and the processing module 12, and the analysis module 13 can store a program, which, when executed, is used to implement the above-mentioned design method for calibrating the pressure head.

[0123] This application may take the form of a computer program product implemented on one or more computer-readable storage media (including, but not limited to, disk storage, optical storage, etc.) containing program code. Computer-readable storage media include permanent and non-permanent, removable and non-removable media, and information storage can be implemented using any method or technology. Information may be computer-readable instructions, data structures, program modules, or other data. Examples of computer-readable storage media include, but are not limited to: phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, optical disc read-only memory, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0124] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0125] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0126] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0127] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0128] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0129] In any embodiment of the above-described carrier component, the carrier component includes a first body and a second body. At least one of the first body and the second body is provided with a mounting groove, and the first body and the second body surround to form a mounting structure, wherein an elastic seal is provided to seal the mounting structure of the carrier component.

[0130] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0131] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for designing a calibration pressure head, wherein the calibration pressure head is used to calibrate a thin-film pressure sensor, the thin-film pressure sensor being used to measure the sealing performance of an elastic seal; at least one of a first body and a second body of a support assembly is provided with a mounting groove, and the first body and the second body surround and form a mounting structure, the elastic seal and the thin-film pressure sensor are sealed and disposed in the mounting structure, and the thin-film pressure sensor and the elastic seal are in abutting fit, characterized in that, The calibration head design method includes: Obtain parameter data of the mounting structure of the load-bearing component, the elastic seal, and the diaphragm pressure sensor, and generate a finite element model based on the parameter data; Obtain the operating parameters of the elastic seal when it is installed in the mounting structure; The operating condition parameters are input into the finite element model for elastic deformation analysis to obtain the force surface parameters of the thin film pressure sensor pressing against the elastic seal. The calibration pressure head is generated based on the force-bearing surface parameters.

2. The calibration head design method according to claim 1, characterized in that, The parameter data includes three-dimensional structural parameters and material characteristic parameters.

3. The calibration head design method according to claim 1, characterized in that, The force-bearing surface parameters include at least one of the force-bearing surface shape and the force-bearing surface area.

4. The calibration head design method according to claim 1, characterized in that, The operating condition parameters include at least one of the external load parameters applied to the bearing component and the installation distance parameters between the first body and the second body.

5. The calibration head design method according to claim 4, characterized in that, The step of inputting the operating condition parameters into the finite element model for elastic deformation analysis to obtain the corresponding stress surface parameters of the elastic seal includes: The operating condition parameters include external load parameters; The external load parameters are input into the finite element model for elastic deformation analysis to obtain the force-bearing surface parameters.

6. The calibration head design method according to claim 4, characterized in that, The step of inputting the operating condition parameters into the finite element model for elastic deformation analysis to obtain the corresponding stress surface parameters of the elastic seal includes: The operating condition parameters are input into the finite element model for elastic deformation analysis to obtain the compression parameters of the elastic seal corresponding to the operating condition. The force-bearing surface parameters of the elastic seal are obtained based on the compression parameters.

7. The calibration head design method according to claim 6, characterized in that, The operating conditions include installation distance parameters; The step of inputting the operating condition parameters into the finite element model for elastic deformation analysis to obtain the compression parameters of the elastic seal corresponding to the operating condition includes: The installation distance parameter is input into the finite element model, and the compression parameter is calculated based on the installation distance parameter.

8. A design system for calibrating pressure heads, characterized in that, The calibration head is used to calibrate the diaphragm pressure sensor, which is used to measure the sealing performance of the elastic seal. At least one of the first body and the second body of the support assembly is provided with a mounting groove, and the first body and the second body surround to form a mounting structure. The elastic seal and the diaphragm pressure sensor are sealed in the mounting structure, and the diaphragm pressure sensor abuts against the elastic seal. The design system for the calibration head includes: The generation module is used to acquire parameter data of the mounting structure of the load-bearing components, the elastic seals, and the diaphragm pressure sensor, and to generate a finite element model based on the parameter data; The processing module is used to obtain the operating condition parameters of the elastic seal when it is installed in the mounting structure; The analysis module is used to input the operating condition parameters into the finite element model for elastic deformation analysis, so as to obtain the force surface parameters of the thin film pressure sensor pressing against the elastic seal. A generation module is used to generate the calibration pressure head based on the force-bearing surface parameters.

9. A calibration system for a thin-film pressure sensor, characterized in that, include: A calibration head, wherein the calibration head is a calibration head prepared by the calibration head design method according to any one of claims 1 to 7; A pressure output component is used to press the calibration head successively with multiple preset pressure values, so that pressure is output through the calibration head to the calibrated diaphragm pressure sensor; A pressure sensing element is electrically connected to the pressure sensor to be calibrated. The pressure sensing element is used to acquire multiple piezoelectric signals that correspond one-to-one with the multiple preset pressure values. The data processing module is used to accept multiple preset pressure values ​​and multiple piezoelectric signals, and the data processing module is used to establish a calibration curve model of the thin film pressure sensor to be calibrated based on the preset pressure values ​​and the piezoelectric signals.

10. A calibration method for a thin-film pressure sensor, characterized in that, The calibration method for the thin-film pressure sensor includes: The pressure output component presses against the calibration head successively with multiple preset pressure values, so that the thin-film pressure sensor to be calibrated is pressed multiple times through the calibration head; the calibration head is the calibration head prepared by the calibration head design method of any one of claims 1 to 7 above; The pressure detection element acquires multiple piezoelectric signals that correspond one-to-one with the multiple preset pressure values; A calibration curve model for the thin-film pressure sensor to be calibrated is established based on multiple preset pressure values ​​and multiple piezoelectric signals.

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