A digital calibration device for measuring the seam difference of skin panels

Abstract

This invention primarily relates to the field of digital calibration technology for measuring the step difference between seams on aircraft skin after assembly. Specifically, it provides a digital calibration device for measuring the step difference between skin seams. By applying the device of this invention, digital calibration of the aircraft skin seam step difference measuring tool can be achieved. This calibration method not only significantly improves the efficiency of calibration work but also enhances the accuracy of calibration, effectively preventing uncalibrated or inaccurately calibrated measuring tools from being incorrectly used in the inspection and acceptance process, thereby ensuring the quality and accuracy of inspection and acceptance.

Description

Technical Field

[0001] This invention primarily relates to the field of digital calibration technology for measuring the step difference between seams in aerospace product assembly. Specifically, it provides a digital calibration device for measuring the step difference between seams in aerospace product assembly. Background Technology

[0002] In the assembly and manufacturing process of aerospace products, accurately measuring critical dimensions such as the step difference between assembled skin panels is crucial. The step difference, in particular, directly affects the overall structural strength and aerodynamic performance of the aircraft. Therefore, accurate measurement of these critical dimensions is fundamental to ensuring aircraft safety and reliability. To accurately measure the step difference, dent depth, and the unevenness of bolts and rivets relative to the surface of aircraft parts, specialized electronic measuring tools are typically used. These tools for step difference measurement must undergo rigorous calibration procedures before being put into use to ensure the accuracy of the measurement results. The rigor of the calibration procedure is reflected in the repeated inspection and adjustment of every detail of the measuring tool to ensure that it meets the expected accuracy standards in actual use. Furthermore, regular maintenance and calibration of the measuring tools are also essential to prevent wear or damage caused by long-term use, which could affect the accuracy of the measurement results.

[0003] In current calibration work for electronic tools used for measuring step differences, it is usually necessary to select appropriate standard substances or standard instruments as calibration benchmarks. These calibration standards are used to perform precise comparative measurements on the instrument to be calibrated to determine its relative error. However, this calibration method relies on manual operation, which not only limits calibration accuracy but also consumes a significant amount of human resources. Therefore, there is an urgent need to develop a new type of digital calibration device specifically for calibrating aircraft skin seam step difference measurement tools to address the problems inherent in traditional calibration methods. Summary of the Invention

[0004] The digital calibration device involved in this invention automates the calibration process by combining advanced modern sensor and data processing technologies. Equipped with a high-precision strain sensor, the device accurately detects changes in deformation of the measuring tool during use and converts these changes into corresponding electrical signals. The device also incorporates a microprocessor responsible for receiving sensor signals and comparing them with preset calibration parameters. Through this intelligent processing, the device automatically adjusts the readings of the measuring tool, ensuring the accuracy of the measurement results. The application of this digital calibration device not only significantly reduces human error but also drastically shortens the calibration time, making the calibration process for aircraft skin seam step difference measuring tools more efficient and reliable, thereby significantly improving the quality and safety of the entire aerospace product assembly and manufacturing process.

[0005] To address the problems existing in the prior art, this invention provides a digital calibration device for measuring the step difference of skin seams. This device enables rapid and efficient calibration of the measuring tool for the step difference of skin seams after the aerospace product is assembled, avoiding detection failure caused by excessive wear of the measuring tool, which would affect the measurement results of the step difference of skin seams in aerospace products, leading to false positives and false negatives, and even affecting the high-quality and rapid delivery of aerospace products.

[0006] According to one aspect of this application, a digital calibration device for measuring the seam difference of skin is provided, comprising a mechanical structure, a moving component, and a sensing and control structure;

[0007] The mechanical structure consists of an upper cover plate 1, connecting screws 2, a main body 8, an HDMI port 14, an HTTP port 15, and a base body 18;

[0008] The actuating component consists of connecting bolts 3, washers 4, hexagonal nuts 5, support bodies 6, electric telescopic cylinders 16, and electric telescopic rods 17.

[0009] The system comprises a strain sensor 7, a switch button 9, a reset button 10, an alarm component 11, a display screen 12, an input component 13, a strain signal conditioning module 19, a data acquisition module 20, a microcontroller 21, and a controller 22.

[0010] The upper cover plate 1 is a mechanical structural component. The upper cover plate 1 is installed on the top of the main body 8 by connecting screws 2. When there is a problem with the electronic components inside the main body 8 and repair is needed, the upper cover plate 1 needs to be opened for operation. The upper cover plate 1 is installed and connected by connecting screws 2, which facilitates maintenance and disassembly and plays a protective role for the electronic components inside the main body 8.

[0011] The connecting screw 2 is a mounting and connecting component. The connecting screw 2 can connect the upper cover plate 1 and the main body 8, making installation and maintenance convenient, and playing the role of connecting and assembling various components.

[0012] The main body 8 is the main load-bearing component. Electronic components can be integrated and constructed inside the main body 8, enabling it to digitally calibrate step difference measurement tools and to support various components, especially various switches, buttons and displays.

[0013] The HDMI port 14 is a display auxiliary component. The HDMI port 14 is installed on the right side of the main body 8. An external display device can be connected through the HDMI port 14 to display the content of the display screen 12 on the external device as required, so that the calibration personnel can have a clearer understanding of the calibration situation.

[0014] The HTTP port 15 is a software operation interface component. The HTTP port 15 is installed on the host 8. The program can be upgraded and the data can be maintained through the HTTP port 15, so as to keep the software program up-to-date and the strongest functional performance at all times.

[0015] The reference body 18 is a reference component. The reference body 18 is installed above the main body 8 and is connected to the main body 8 by connecting screws 2. When carrying out calibration work, the reference end of the skin seam difference measuring tool to be calibrated is placed on the upper surface of the reference body 18 and is completely in contact with the upper surface of the reference body 18, so as to provide a reference surface for calibration work.

[0016] The connecting bolt 3, washer 4, and hexagonal nut 5 are fastening components. The electric telescopic rod 17 is connected to the support body 6 by the connecting bolt 3, washer 4, and hexagonal nut 5, which plays a role in connection and fastening, ensuring that the support body 6 moves together with the electric telescopic rod 17. In addition, the washer 4 increases the contact area and reduces the pressure. By increasing the contact area between the connecting bolt 3 and the support body 6, the force is reduced.

[0017] The support body 6 is a support component. The support body 6 can be used to measure and place the skin seam step difference measuring tool. During the calibration work, the reference end of the skin seam step difference measuring tool to be calibrated is placed on the upper surface of the reference body 18 and completely fits. The measuring end of the skin seam step difference measuring tool is close to the support body 6. The electric telescopic rod 17 can drive the support body 6 and the strain sensor 7 connected to the upper end to be raised and lowered synchronously, which can adjust the calibration height of the skin seam step difference measuring tool. The support body 6 plays the role of supporting the measurement and adjustment.

[0018] The electric telescopic cylinder 16 is a power component. The electric telescopic cylinder 16 can provide power to the electric telescopic rod 17, enabling it to move up and down in the direction of the telescopic cylinder. The electric telescopic cylinder 16 can drive the electric telescopic rod 17 to adjust its height, thereby driving the electric telescopic rod 17 and the strain sensor 7 placed on its upper end to adjust their height synchronously.

[0019] The electric telescopic rod 17 is an adjustable connecting component. The output end of the electric telescopic cylinder 16 can be connected to the electric telescopic rod 17. The upper end of the electric telescopic rod 17 is connected to the support body 6 by bolts, which serves to drive the support body 6.

[0020] The strain sensor 7 is a calibration component. The strain sensor 7 is installed on the upper surface of the support 6. When working, the strain sensor 7 contacts the measuring end of the tool for measuring the seam difference of the skin to be calibrated, generating elastic strain on the strain sensor 7, and using the strain to indirectly feed back the measurement data.

[0021] The switch button 9 is a start / stop component. The switch button 9 is installed on the main body 8 and is used to start and stop the digital calibration device. The digital calibration device can be easily started and stopped using the switch button 9.

[0022] The reset button 10 is a data reset component. The reset button 10 is installed on the main body 8. After a measurement is completed, the measurement data can be cleared by using the reset button 10 to prepare for the next measurement.

[0023] The warning component 11 is an alarm component. The warning component 11 is installed on the main body 8. When the calibration result is not within the preset range of the program (the voltage is not in the range of 0.1V to 0.15V), it will flash to warn and serve as an alarm prompt to prevent the manual visual display screen 12 from making mistakes or missing detections.

[0024] The display screen 12 is a data presentation component. The display screen 12 is fixed to the upper surface of the main body 8 with screws and is used to display size data and qualification judgment conclusion data, and plays the role of displaying calibration conclusion.

[0025] The input component 13 is an input operation component. The data to be calibrated is manually input using the input component 13. After receiving the data instruction input by the input component 13, the microcontroller 21 issues a control instruction to the controller 22 according to the logical relationship. The electric telescopic cylinder 16 drives the electric telescopic rod 17 to move, and synchronously adjusts the support body 6 and strain sensor 7 connected to its upper end to match the data input by the input component 13.

[0026] The strain signal conditioning module 19 is a signal conditioning component. The strain signal conditioning module 19 is installed inside the main body 8 and is used to convert the strain signal collected by the strain sensor 7 into a voltage signal, thereby playing the role of signal conversion.

[0027] The data acquisition module 20 is a signal acquisition component. The data acquisition module 20 can acquire the strain signal of the strain sensor 7 and transmit the strain signal to the strain signal conditioning module 19, which serves as a signal input and facilitates the strain signal conditioning module 19 to call the strain signal.

[0028] The microcontroller 21 is a signal processing component. Installed inside the main body 8, the microcontroller 21 is mainly used to receive the voltage signal processed by the strain signal conditioning module 19, process the voltage signal according to the internal software program, form a calibration conclusion based on the internal logic relationship, and send the calibration conclusion formed by the microcontroller 21 through the controller 22 to realize the main function of calibration. The controller 22 is a control output component. It can drive the warning component 11 and the electric telescopic cylinder 16 to perform corresponding actions according to the calibration conclusion formed by the microcontroller 21 and the input data instructions of the input component 13 to complete the calibration work.

[0029] The specific working process is implemented through the following steps: First, the step difference signal to be calibrated is input using the input component according to the requirements. The microcontroller guides the controller to issue corresponding control commands. Different control commands control different actions. The switch command controls the opening of the calibration device and the movement of the electric telescopic cylinder, which drives the electric telescopic rod to extend and retract, thereby moving the support body. This causes the strain sensor to generate a corresponding analog signal, which is then acquired by the data acquisition module. The data acquisition module collects the analog signal and transmits it to the strain signal conditioning module, which converts the model signal into a digital signal. The digital signal is then transmitted to the microcontroller for further judgment. Based on the digital signal, a conclusion of whether the calibration is qualified or not is made, and a display command is issued to the controller. The display screen shows the specific calibration value and conclusion. When a failure occurs, the controller controls the warning component to convey a warning signal and can use a reset signal to apply control operations to the microcontroller to reset the previous calibration to zero, so that the calibration work can be carried out again. This realizes the digital automatic diagnosis and calibration of the countersunk head measuring tool.

[0030] The advantages of this application are:

[0031] When calibrating electronic tools for measuring step differences, it is typically necessary to select appropriate standard substances or instruments as calibration benchmarks. Using these calibration standards, precise comparative measurements are performed on the instrument to be calibrated to determine its relative error. However, this calibration method relies on manual operation, which not only limits calibration accuracy but also consumes significant human resources. Therefore, there is an urgent need to develop a novel digital calibration device specifically for calibrating aircraft skin seam step difference measurement tools to address the problems inherent in traditional calibration methods.

[0032] This invention employs digital technology to calibrate step difference measurement tools, aiming to improve the reliability of measurement results. It overcomes the shortcomings of traditional manual calibration methods by using strain sensors, microcontrollers, and controllers to process sampled data, avoiding errors from manual calculations and thus improving calibration accuracy. The invention cleverly utilizes the feedback mechanism of strain sensors in its structural design to achieve digital calibration of step difference measurement tools, significantly improving calibration accuracy and efficiency.

[0033] The present invention features a simple design, making it easy to operate and carry. Applying this invention significantly improves the accuracy and efficiency of the step difference measurement tool calibration process. Digital calibration of the step difference measurement tool not only improves calibration accuracy but also saves substantial human resources, effectively reducing labor costs and time consumption, thereby greatly enhancing the efficiency of calibration work. In actual aircraft manufacturing and maintenance processes, the digital calibration device of this invention has demonstrated its significant advantages. It not only improves the calibration efficiency of the measuring tool but also ensures the accuracy of aircraft skin seam alignment, which is crucial for ensuring flight safety. By reducing human intervention, this invention also reduces the risk of operational errors, further improving the overall quality of aircraft manufacturing. Therefore, the implementation effects of this invention are not only reflected in the technical aspects but also bring positive impacts to related industries in terms of economic benefits and safety. Attached Figure Description

[0034] Figure 1 A flowchart of a digital calibration method for a tool used to measure the step difference in skin seams;

[0035] Figure 2 Axonometric drawing of a digital calibration device used for measuring the step difference of skin seams;

[0036] Figure 3 Front view of the digital calibration device used for measuring the seam step difference of skin;

[0037] Figure 4 A front sectional view of a digital calibration device used for measuring the step difference of skin seams;

[0038] Figure 5 A top view of the digital calibration device used for measuring the seam difference of skin panels.

[0039] The components include: 1. Top cover plate; 2. Connecting screws; 3. Connecting bolts; 4. Washers; 5. Hexagonal nuts; 6. Support body; 7. Strain sensor; 8. Main body; 9. Switch button; 10. Reset button; 11. Warning component; 12. Display screen; 13. Input component; 14. HDMI port; 15. HTTP port; 16. Electric telescopic cylinder; 17. Electric telescopic rod; 18. Reference body; 19. Strain signal conditioning module; 20. Data acquisition module; 21. Microcontroller; 22. Controller. Detailed Implementation

[0040] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0041] Example 1

[0042] A digital calibration device for measuring the step difference of skin seams, comprising a mechanical structure, actuating components, and a sensing and control structure;

[0043] The mechanical structure consists of an upper cover plate 1, connecting screws 2, a main body 8, an HDMI port 14, an HTTP port 15, and a base body 18;

[0044] The actuating component consists of connecting bolts 3, washers 4, hexagonal nuts 5, support bodies 6, electric telescopic cylinders 16, and electric telescopic rods 17.

[0045] The system comprises a strain sensor 7, a switch button 9, a reset button 10, an alarm component 11, a display screen 12, an input component 13, a strain signal conditioning module 19, a data acquisition module 20, a microcontroller 21, and a controller 22.

[0046] The upper cover plate 1 is a mechanical structural component. The upper cover plate 1 is installed on the top of the main body 8 by connecting screws 2. When there is a problem with the electronic components inside the main body 8 and repair is needed, the upper cover plate 1 needs to be opened for operation. The upper cover plate 1 is installed and connected by connecting screws 2, which facilitates maintenance and disassembly and plays a protective role for the electronic components inside the main body 8.

[0047] The connecting screw 2 is a mounting and connecting component. The connecting screw 2 can connect the upper cover plate 1 and the main body 8, making installation and maintenance convenient, and playing the role of connecting and assembling various components.

[0048] The main body 8 is the main load-bearing component. Electronic components can be integrated and constructed inside the main body 8, enabling it to digitally calibrate step difference measurement tools and to support various components, especially various switches, buttons and displays.

[0049] The HDMI port 14 is a display auxiliary component. The HDMI port 14 is installed on the right side of the main body 8. An external display device can be connected through the HDMI port 14 to display the content of the display screen 12 on the external device as required, so that the calibration personnel can have a clearer understanding of the calibration situation.

[0050] The HTTP port 15 is a software operation interface component. The HTTP port 15 is installed on the host 8. The program can be upgraded and the data can be maintained through the HTTP port 15, so as to keep the software program up-to-date and the strongest functional performance at all times.

[0051] The reference body 18 is a reference component. The reference body 18 is installed above the main body 8 and is connected to the main body 8 by connecting screws 2. When carrying out calibration work, the reference end of the skin seam difference measuring tool to be calibrated is placed on the upper surface of the reference body 18 and is completely in contact with the upper surface of the reference body 18, so as to provide a reference surface for calibration work.

[0052] The connecting bolt 3, washer 4, and hexagonal nut 5 are fastening components. The electric telescopic rod 17 is connected to the support body 6 by the connecting bolt 3, washer 4, and hexagonal nut 5, which plays a role in connection and fastening, ensuring that the support body 6 moves together with the electric telescopic rod 17. In addition, the washer 4 increases the contact area and reduces the pressure. By increasing the contact area between the connecting bolt 3 and the support body 6, the force is reduced.

[0053] The support body 6 is a support component. The support body 6 can be used to measure and place the skin seam step difference measuring tool. During the calibration work, the reference end of the skin seam step difference measuring tool to be calibrated is placed on the upper surface of the reference body 18 and completely fits. The measuring end of the skin seam step difference measuring tool is close to the support body 6. The electric telescopic rod 17 can drive the support body 6 and the strain sensor 7 connected to the upper end to be raised and lowered synchronously, which can adjust the calibration height of the skin seam step difference measuring tool. The support body 6 plays the role of supporting the measurement and adjustment.

[0054] The electric telescopic cylinder 16 is a power component. The electric telescopic cylinder 16 can provide power to the electric telescopic rod 17, enabling it to move up and down in the direction of the telescopic cylinder. The electric telescopic cylinder 16 can drive the electric telescopic rod 17 to adjust its height, thereby driving the electric telescopic rod 17 and the strain sensor 7 placed on its upper end to adjust their height synchronously.

[0055] The electric telescopic rod 17 is an adjustable connecting component. The output end of the electric telescopic cylinder 16 can be connected to the electric telescopic rod 17. The upper end of the electric telescopic rod 17 is connected to the support body 6 by bolts, which serves to drive the support body 6.

[0056] The strain sensor 7 is a calibration component. The strain sensor 7 is installed on the upper surface of the support 6. When working, the strain sensor 7 contacts the measuring end of the tool for measuring the seam difference of the skin to be calibrated, generating elastic strain on the strain sensor 7, and using the strain to indirectly feed back the measurement data.

[0057] The switch button 9 is a start / stop component. The switch button 9 is installed on the main body 8 and is used to start and stop the digital calibration device. The digital calibration device can be easily started and stopped using the switch button 9.

[0058] The reset button 10 is a data reset component. The reset button 10 is installed on the main body 8. After a measurement is completed, the measurement data can be cleared by using the reset button 10 to prepare for the next measurement.

[0059] The warning component 11 is an alarm component. The warning component 11 is installed on the main body 8. When the calibration result is not within the preset range of the program (the voltage is not in the range of 0.1V to 0.15V), it will flash to warn and serve as an alarm prompt to prevent the manual visual display screen 12 from making mistakes or missing detections.

[0060] The display screen 12 is a data presentation component. The display screen 12 is fixed to the upper surface of the main body 8 with screws and is used to display size data and qualification judgment conclusion data, and plays the role of displaying calibration conclusion.

[0061] The input component 13 is an input operation component. The data to be calibrated is manually input using the input component 13. After receiving the data instruction input by the input component 13, the microcontroller 21 issues a control instruction to the controller 22 according to the logical relationship. The electric telescopic cylinder 16 drives the electric telescopic rod 17 to move, and synchronously adjusts the support body 6 and strain sensor 7 connected to its upper end to match the data input by the input component 13.

[0062] The strain signal conditioning module 19 is a signal conditioning component. The strain signal conditioning module 19 is installed inside the main body 8 and is used to convert the strain signal collected by the strain sensor 7 into a voltage signal, thereby playing the role of signal conversion.

[0063] The data acquisition module 20 is a signal acquisition component. The data acquisition module 20 can acquire the strain signal of the strain sensor 7 and transmit the strain signal to the strain signal conditioning module 19, which serves as a signal input and facilitates the strain signal conditioning module 19 to call the strain signal.

[0064] The microcontroller 21 is a signal processing component. Installed inside the main body 8, the microcontroller 21 is mainly used to receive the voltage signal processed by the strain signal conditioning module 19, process the voltage signal according to the internal software program, form a calibration conclusion based on the internal logic relationship, and send the calibration conclusion formed by the microcontroller 21 through the controller 22 to realize the main function of calibration. The controller 22 is a control output component. It can drive the warning component 11 and the electric telescopic cylinder 16 to perform corresponding actions according to the calibration conclusion formed by the microcontroller 21 and the input data instructions of the input component 13 to complete the calibration work.

[0065] The specific work process is as follows:

[0066] Step 1: Before use, inspect the calibration device for appearance and conformity labels. Check whether the calibration device has complete calibration labels and whether the appearance is intact. If it is complete and intact, proceed to the next step.

[0067] Step 2: Press switch button 9 to turn on the digital calibration device, check the continuity of the calibration device circuit, and ensure that the calibration device is functioning properly.

[0068] Step 3: Input the step difference dimension to be calibrated through input component 13. After the display screen 12 shows the corresponding dimension, continue to the next step.

[0069] Step 4: Place the joint step difference measuring tool to be calibrated on the reference body 18 and the support body 6, and make the reference of the joint step difference measuring tool closely attached to the reference body 18. Check the fit between the measuring part of the joint step difference measuring tool and the strain sensor 7 on the support body 6. If it is not qualified, the warning component 11 will issue a warning.

[0070] Step 5: Check the pass / fail status displayed on screen 12, and repeat step 4 for retesting to increase calibration reliability;

[0071] Step 6: After calibration, press the power button 9 to turn off the power to the entire calibration device, and put the calibration device back in its original position to complete the calibration and verification work.

[0072] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions made by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A digital calibration device for measuring the seam difference of skin panels, characterized in that, It consists of mechanical structure, moving parts, and sensing and control structure; The mechanical structure consists of an upper cover plate (1), connecting screws (2), a main body (8), an HDMI port (14), an HTTP port (15), and a base body (18); The actuating component consists of connecting bolts (3), washers (4), hexagonal nuts (5), support body (6), electric telescopic cylinder (16), and electric telescopic rod (17); The sensing and control structure consists of a strain sensor (7), a switch button (9), a reset button (10), an alarm component (11), a display screen (12), an input component (13), a strain signal conditioning module (19), a data acquisition module (20), a microcontroller (21), and a controller (22); The reference body (18) is a reference component. The reference body (18) is installed above the main body (8). It is connected to the main body (8) by connecting screws (2). When carrying out calibration work, the reference end of the measuring tool for the seam difference of the skin to be calibrated is placed on the upper surface of the reference body (18) and is completely in contact with the upper surface of the reference body (18), which serves to provide a reference surface for calibration work. The support body (6) is a support component. The support body (6) can be used to measure and place the skin seam step difference measuring tool. During the calibration work, the reference end of the skin seam step difference measuring tool to be calibrated is placed on the upper surface of the reference body (18) and completely fits. The measuring end of the skin seam step difference measuring tool is close to the support body (6). The electric telescopic rod (17) can drive the support body (6) and strain sensor (7) connected to the upper end to be raised and lowered synchronously. The calibration height of the skin seam step difference measuring tool can be adjusted. The support body (6) plays the role of supporting the measurement adjustment. The strain sensor (7) is a calibration component. The strain sensor (7) is installed on the upper surface of the support (6). When working, the strain sensor (7) contacts the measuring end of the tool for measuring the seam difference of the skin to be calibrated, generating elastic strain on the strain sensor (7) and using the strain to indirectly feed back the measurement data.

2. The digital calibration device for measuring the seam difference of skin as described in claim 1, characterized in that, The upper cover plate (1) is a mechanical structural component. The upper cover plate (1) is installed on the main body (8) by connecting screws (2). When there is a problem with the electronic components inside the main body (8) and repair is needed, the upper cover plate (1) needs to be opened for operation. The upper cover plate (1) is installed and connected by connecting screws (2), which is conducive to maintenance and disassembly and plays a protective role for the electronic components inside the main body (8). The connecting screw (2) is an installation connecting component. The connecting screw (2) can connect the upper cover plate (1) and the main body (8), making installation convenient and maintenance convenient, and playing the role of connecting and assembling various components. The main body (8) is the main load-bearing component. Electronic components can be integrated and constructed inside the main body (8) so that it has the function of digitally calibrating the step difference measurement tool and plays the role of supporting various components.

3. The digital calibration device for measuring the seam difference of skin as described in claim 2, characterized in that, The HDMI port (14) is a display auxiliary component. The HDMI port (14) is installed on the right side of the main body (8). An external display device can be connected through the HDMI port (14) to display the content of the display screen (12) on the external device as required, so that the calibration personnel can have a clearer understanding of the calibration situation. The HTTP port (15) is a software operation interface component. The HTTP port (15) is installed on the host (8). The program can be upgraded and the data can be maintained through the HTTP port (15), so as to keep the latest software program and the strongest functional performance at all times.

4. The digital calibration device for measuring the seam difference of skin as described in claim 3, characterized in that, The connecting bolt (3), washer (4) and hexagonal nut (5) are fastening components. The electric telescopic rod (17) is connected to the support body (6) by the connecting bolt (3), washer (4) and hexagonal nut (5), which plays a role in connection and fastening, ensuring that the support body (6) moves together with the electric telescopic rod (17). The washer (4) increases the contact area and reduces the pressure. The force is reduced by increasing the contact area between the connecting bolt (3) and the support body (6).

5. The digital calibration device for measuring the seam difference of skin as described in claim 4, characterized in that, The electric telescopic cylinder (16) is a power component. The electric telescopic cylinder (16) can provide power to the electric telescopic rod (17) so that it can perform up and down telescopic movements in the direction of the telescopic cylinder. The electric telescopic cylinder (16) can drive the electric telescopic rod (17) to adjust its height, thereby driving the electric telescopic rod (17) and the strain sensor (7) placed on its upper end to adjust their height synchronously. The electric telescopic rod (17) is an adjustable connecting component. The output end of the electric telescopic cylinder (16) can be connected to the electric telescopic rod (17). The upper end of the electric telescopic rod (17) is connected to the support body (6) by bolts, which plays the role of driving the support body (6).

6. The digital calibration device for measuring the seam difference of skin as described in claim 1, characterized in that, The switch button (9) is a start / stop component. The switch button (9) is installed on the main body (8) and is used to start and stop the digital calibration device. The digital calibration device can be easily started and stopped using the switch button (9). The reset button (10) is a data reset component. The reset button (10) is installed on the main body (8). After a measurement is completed, the measurement data can be cleared by using the reset button (10) to prepare for the next measurement. The warning component (11) is an alarm component. The warning component (11) is installed on the main body (8). When the calibration result is not within the preset range of the program, it will flash to warn and serve as an alarm prompt to prevent the manual visual display screen (12) from making mistakes or missing detections. The display screen (12) is a data presentation component. The display screen (12) is fixed to the upper surface of the main body (8) with screws and is used to display size data and qualification judgment conclusion data, and plays the role of displaying calibration conclusion.

7. The digital calibration device for measuring the seam difference of skin as described in claim 6, characterized in that, The input component (13) is an input operation component. The data to be calibrated is manually input using the input component (13). After receiving the data instruction input by the input component (13), the microcontroller (21) issues a control instruction to the controller (22) according to the logical relationship. The electric telescopic cylinder (16) drives the electric telescopic rod (17) to move, and synchronously adjusts the support body (6) and strain sensor (7) connected to its upper end to match the data input by the input component (13).

8. The digital calibration device for measuring the seam difference of skin as described in claim 7, characterized in that, The strain signal conditioning module (19) is a signal conditioning component. The strain signal conditioning module (19) is installed inside the main body (8) and is used to convert the strain signal collected by the strain sensor (7) into a voltage signal, thus playing the role of signal conversion.

9. The digital calibration device for measuring the seam difference of skin as described in claim 8, characterized in that, The data acquisition module (20) is a signal acquisition component. The data acquisition module (20) can acquire the strain signal of the strain sensor (7) and transmit the strain signal to the strain signal conditioning module (19), which serves as a signal input and facilitates the strain signal conditioning module (19) to call the strain signal. The microcontroller (21) is a signal processing component. It is installed inside the main body (8) and is mainly used to receive the voltage signal processed by the strain signal conditioning module (19), process the voltage signal according to the internal software program, form a calibration conclusion according to the internal logic relationship, and send the calibration conclusion formed by the microcontroller (21) through the controller (22) to realize the main function of calibration. The controller (22) is a control output component. It can drive the warning component (11) and the electric telescopic cylinder (16) to make corresponding actions according to the calibration conclusion formed by the microcontroller (21) and the input data instruction of the input component (13) to complete the calibration work.

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