A digital calibration device for measuring the perpendicularity of internal holes

Abstract

This invention primarily relates to the field of digital calibration technology for internal hole perpendicularity measuring tools after hole drilling in aerospace products. Specifically, this invention provides a digital calibration device for internal hole perpendicularity measuring tools. By employing the device provided by this invention, digital calibration of internal hole perpendicularity measuring tools after hole drilling in aerospace products can be achieved, significantly improving the reliability and efficiency of the calibration process, while effectively reducing the occurrence of errors and omissions, thereby ensuring the quality and safety of aerospace products.

Description

Technical Field

[0001] This invention primarily relates to the field of digital calibration technology for internal hole perpendicularity measuring tools after hole drilling in aerospace products. Specifically, this invention provides a digital calibration device for internal hole perpendicularity measuring tools. Background Technology

[0002] In the current field of aerospace product assembly, drilling rivet and bolt holes is a crucial step, and drilling a large number of these holes is indispensable. The perpendicularity of these holes has a decisive impact on the connection strength of riveting and bolting. To ensure that the perpendicularity of the holes meets the standard requirements, precise inspection using testing tools is usually required. However, before these testing tools can be effectively used, they must undergo a series of rigorous calibration procedures. Therefore, developing a testing tool specifically designed for calibrating internal hole perpendicularity before testing is particularly important. The development of such a tool can not only significantly reduce the calibration time and improve the efficiency of the assembly process, but also play a vital role in ensuring the overall quality of aerospace products, while ensuring that the final product meets stringent safety standards.

[0003] Currently, the calibration process for existing testing tools before aperture perpendicularity testing often relies on visual judgment by staff or the use of traditional tools such as feeler gauges to manually calibrate the perpendicularity of the testing tools. This method is not only time-consuming and labor-intensive, but also, due to its reliance on manual operation, it is often difficult to guarantee the accuracy and consistency of the calibration. Summary of the Invention

[0004] Therefore, there is an urgent need to design a digital calibration device specifically for calibrating the measuring tool for the perpendicularity of the inner hole diameter after drilling in aerospace products. This device can achieve an automated and high-precision calibration process, thereby effectively solving the current problem of insufficient calibration accuracy and ensuring the assembly quality of aerospace products. The introduction of this digital calibration device will greatly improve the automation level of the aerospace manufacturing industry, reduce human error, and improve overall production efficiency.

[0005] This digital calibration device is designed to improve calibration efficiency and accuracy. Utilizing advanced sensor technology, it automatically detects and adjusts the perpendicularity of the measuring tool to ensure perfect alignment with the centerline of the measured hole. The device's built-in microprocessor processes sensor data in real time and automatically adjusts the tool's position via a high-precision actuator until optimal perpendicularity is achieved. Furthermore, the device features a user-friendly interface, allowing operators to easily perform calibration operations and monitor the process and results in real time. This approach not only improves calibration efficiency but also significantly reduces reliance on operator skill levels, making the entire calibration process more standardized and regulated. The use of this device will revolutionize the aerospace manufacturing industry, ensuring that the assembly of every component meets the highest standards, thereby guaranteeing flight safety.

[0006] To address the problems existing in the prior art, the present invention provides a digital calibration device for measuring the perpendicularity of internal holes. This digital calibration method and device can achieve rapid and efficient calibration of the measuring tool for the perpendicularity of rivet holes or bolt holes, avoiding failure of the measuring tool due to wear, which would affect the calibration results and thus the perpendicularity of the rivet holes or bolt holes.

[0007] According to one aspect of this application, a digital calibration device for measuring the perpendicularity of an internal hole is provided, comprising a mechanical structure, a transmission structure, and a calibration control structure;

[0008] The mechanical structure consists of a main body 1, a support body 2, an actuator cover 3, a calibration block 4, an HDMI port 7, an HTTP port 8, and connecting screws 14.

[0009] The transmission structure consists of a working component 5, a transmission shaft 15, a bearing 16, and a rotary servo motor 17.

[0010] The calibration control structure consists of a strain sensor 6, an input component 9, a display screen 10, an alarm 11, a switch button 12, a reset button 13, a strain signal conditioning module 18, a data acquisition module 19, a microcontroller 20, and a controller 21.

[0011] The main body 1 is a support and load-bearing component. The upper end of the main body 1 is fixedly connected to components such as support body 2, actuator cover 3, calibration block 4 and rotation servo motor 17. The components calibrated by the verticality detection tool can be integrated and used to provide support and placement.

[0012] The support body 2 is a support component. The support body 2 is fixedly installed on the upper end of the main body 1. The support body 2 is used to support the verticality detection tool, so as to keep the position of the internal hole verticality detection tool stable when performing digital calibration.

[0013] The actuator cover 3 is a protective component. A rotary servo motor 17 is installed inside the actuator cover 3. Placing the rotary servo motor 17 inside the actuator cover 3 can facilitate the rotation of the rotary servo motor 17 and protect it, so that the rotary servo motor 17 is in a relatively safe environment and avoids damage to it from external factors, thus playing a protective role.

[0014] The calibration block 4 is the main working component. The calibration block 4 is installed on the upper part of the main body 1. The verticality measuring tool can be calibrated and tested using the calibration block 4. During calibration, the servo motor 17 is rotated, which in turn drives the transmission shaft 15 to rotate synchronously. Subsequently, the working component 5 is rotated synchronously to adjust and change the angle between the working component 5 and the vertical direction. At this time, the inner hole verticality measuring tool is inserted into the calibration block 4 so that it contacts the strain sensor 6. The information displayed on the display screen 10 is checked to determine whether it is qualified or not.

[0015] The HDMI port 7 is an external expansion component. The HDMI port 7 is located on one side of the main body 1, which can easily expand the external digital display device and thus expand the display of information on the display screen 10.

[0016] The HTTP port 8 is a maintenance interface component. The HTTP port 8 is also located on one side of the host body 1 and is used to maintain the necessary programs and play the role of upgrading and updating programs.

[0017] The connecting screw 14 is the main connecting component, mainly used to realize the interconnection between various components. The use of connecting screws facilitates disassembly and maintenance, and improves maintenance efficiency.

[0018] The working component 5 is a calibration and testing component. Rotating the servo motor 17 drives the transmission shaft 15 to rotate synchronously, which in turn drives the working component 5 to rotate synchronously and adjust, changing the angle between the working component 5 and the vertical direction to simulate the angle of the workpiece to be calibrated and measured, and facilitating the insertion of the inner hole perpendicularity measuring tool into the working component 5.

[0019] The drive shaft 15 is the main transmission connection component. One end of the drive shaft 15 is fixedly connected to the output end of the rotary servo motor 17, and the other end of the drive shaft 15 is connected to the working component 5. The output end of the rotary servo motor 17 can be connected to the working component 5, so that the rotary servo motor 17 can drive the working component 5 to rotate and adjust the angle, thereby completing the selection of the angle required for calibration.

[0020] The bearing 16 is a connecting and protective component. The bearing 16 uses smooth metal balls or rollers and lubricated inner and outer metal surfaces to reduce friction, protect the connection between the output end of the rotating servo motor 17 and the transmission shaft 15, and prevent excessive wear from causing damage to the component.

[0021] The rotary servo motor 17 is the core power supply component. The rotary servo motor 17 can drive the transmission shaft 15 to rotate, which in turn drives the working component 5 to rotate, so that its angle can be adjusted, which facilitates the digital calibration and testing of the inner hole perpendicularity measuring tool.

[0022] The strain sensor 6 is a calibration sensing component. The angle between the working component 5 and the vertical direction is adjusted so that the verticality detection tool comes into contact with the strain sensor 6 for detection. The strain sensor 6 can detect the magnitude of the strain deformation and transmit the strain deformation to the data acquisition module 19 for further processing.

[0023] The input component 9 is a calibration input unit. When performing aperture verticality detection, the detection angle is input using the input component 9. After receiving the instruction input by the input component 9, the microcontroller 20 issues a control instruction to the controller 21 according to the logic relationship. After receiving the instruction, the controller 21 drives the rotation servo motor 17 to rotate, which in turn drives the transmission shaft 15 to rotate synchronously. Subsequently, it drives the working component 5 to rotate synchronously for adjustment, changing the angle between the working component 5 and the vertical direction. The angle input by the input component 9 can be used to conveniently set the inner hole verticality measuring tool to the required angle.

[0024] The display screen 10 is a display component. The display screen 10 is set on the upper surface of the main body 1 and is used to display calibration results and pass / fail criteria, so that the calibration data can be displayed more intuitively.

[0025] The alarm 11 is an alarm component. The alarm 11 is installed on the main body 1. When the display screen 10 shows that the pass criterion is unqualified, the microcontroller 20 will transmit the unqualified command to the controller 21. The controller 21 will drive the alarm 11 to issue a warning alarm, which serves as an alarm prompt.

[0026] The switch button 12 is a start / stop component. The switch button 12 is installed on the main body 1 to realize the opening and stopping of the device. The switch button 12 can be used to conveniently and efficiently start and stop the digital calibration device, which facilitates the calibration work.

[0027] The reset button 13 is a reset component. The reset button 13 is installed on the main body 1. The reset button 13 can reset the value recording after the recording is completed. The secondary recording of the reset button 13 provides accuracy guarantee for the digital calibration of the inner hole verticality measuring tool. The alarm information can be canceled by the microcontroller 20 according to the reset button 13. The processed information will be transmitted to the controller 21 to drive the alarm 11 to turn off the alarm.

[0028] The data acquisition module 19 is an information acquisition component. The data acquisition module 19 can acquire the strain deformation amount sensed by the strain sensor 6 and transmit it to the strain signal conditioning module 18 so that it can convert the strain deformation amount into a voltage signal.

[0029] The strain signal conditioning module 18 is a signal conversion component. During operation, the strain signal conditioning module 13 is used to condition the strain signal and convert the deformation into voltage, which facilitates the subsequent data processing by the microcontroller 20 and the controller 21.

[0030] The microcontroller 20 is a signal processing component. It is installed inside the main body 1. The microcontroller 20 receives the voltage signal processed by the strain signal conditioning module 18 and compares it with the set voltage (the set voltage is 0.1V-0.15V as the qualified range). It then generates a control command and transmits it to the controller 21. The controller 21 issues control commands to the microcontroller 15 to drive the alarm 11 to work or not. The controller 21 is a control transmission component. It can drive the servo motor 17 to rotate according to the signal transmitted by the microcontroller 20, thereby driving the transmission shaft 15 to rotate synchronously. Subsequently, it drives the working component 5 to rotate synchronously and adjust, changing the angle between the working component 5 and the vertical direction, or driving the alarm 11 to work or not according to the command, thus realizing the transmission and issuance of control commands.

[0031] The specific working process is implemented through the following steps: The microcontroller is controlled by a control signal. First, the verticality signal to be calibrated is input using the input component according to requirements. The microcontroller instructs the controller to issue corresponding control commands. Different control commands control different actions. A switch command controls the servo motor to rotate, driving the transmission shaft to perform corresponding actions, which in turn moves the working component, causing the strain sensor to generate a corresponding analog signal. The data acquisition module collects the analog signal and transmits it to the strain signal conditioning module. The strain signal conditioning module converts the model signal into a digital signal and transmits the digital signal 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 alarm to transmit a warning signal. After one calibration is completed, a reset signal can be used to control the microcontroller to reset the previous calibration to zero, ready for the next calibration. This achieves the digital calibration of the verticality measuring tool.

[0032] The advantages of this application are:

[0033] Through in-depth research and detailed analysis of various measurement methods and tools widely used in the market, we discovered a significant problem: the digital calibration of perpendicularity measuring tools presents considerable difficulties. This problem primarily stems from the high reliance on manual operation during the calibration process. In the manual calibration of perpendicularity measuring tools, the operator's subjective judgment and specific operating methods often significantly influence the calibration results. This reliance prevents the achievement of complete digital calibration, severely impacting the accuracy and reliability of the calibration results. These issues not only affect the calibration results of digital calibration of perpendicularity measuring tools but also negatively impact the efficiency and accuracy of the calibration process.

[0034] To address the aforementioned problems, this invention proposes a novel calibration device for perpendicularity measuring tools that is simple in structure and easy to operate and carry. This device significantly improves the accuracy and efficiency of the perpendicularity measuring tool calibration process. By utilizing digital technology to calibrate the perpendicularity measuring tool, not only is the calibration accuracy greatly improved, but significant human resources are also effectively saved. This innovative calibration method saves labor costs and time, thereby fundamentally improving the efficiency of calibration work.

[0035] Furthermore, this device boasts excellent scalability and compatibility, seamlessly integrating with various existing measurement systems to enhance its applicability across diverse application scenarios. In practical applications, further analysis revealed that traditional verticality measurement tool calibration methods often rely on experienced technicians, increasing labor costs and potentially leading to inconsistent calibration quality in situations with high staff turnover. This device's calibration process is simple and intuitive, requiring no complex training for operators, significantly lowering the operational threshold and enabling more non-professionals to perform precise verticality measurement tool calibration. The novel verticality measurement tool calibration device of this invention, through its intelligent design, reduces reliance on operator experience, ensuring consistent high standards in every calibration. Moreover, the device automatically records and stores calibration data, facilitating subsequent data analysis and quality tracking, providing strong data support for quality control. Actual testing demonstrated that the device's calibration accuracy reaches industry-leading levels, with repeatability errors controlled at the micrometer level, meeting the demands of high-precision measurement. Simultaneously, the device's stability and durability have been verified, maintaining stable performance during extended continuous operation, providing users with long-term reliable calibration services.

[0036] In summary, the novel perpendicularity measuring tool calibration device of this invention not only solves the problems existing in traditional calibration methods, but also brings revolutionary improvements to perpendicularity measuring tool calibration work through its innovative design and functions. It not only improves calibration accuracy and efficiency, but also reduces operational difficulty and cost, making perpendicularity measuring tool calibration work more scientific, efficient, and economical. Therefore, this device has broad market application prospects and promotional value, and is expected to become a new standard in the field of perpendicularity measuring tool calibration. Attached Figure Description

[0037] Figure 1 This is a flowchart illustrating the working process of a digital calibration device for measuring the perpendicularity of internal holes.

[0038] Figure 2 An isometric drawing of a digital calibration device for measuring the perpendicularity of internal holes;

[0039] Figure 3 A front view of a digital calibration device for measuring the perpendicularity of internal holes;

[0040] Figure 4 A top view of a digital calibration device for measuring the perpendicularity of internal holes;

[0041] Figure 5 Right view of a digital calibration device for measuring the perpendicularity of internal holes;

[0042] Figure 6 This is a schematic diagram illustrating the offset angle calculation of a digital calibration device for measuring the perpendicularity of internal holes.

[0043] The components include: 1. Main body, 2. Support body, 3. Actuator cover, 4. Calibration block, 5. Working component, 6. Strain sensor, 7. HDMI port, 8. HTTP port, 9. Input component, 10. Display screen, 11. Alarm, 12. Switch button, 13. Reset button, 14. Connecting screw, 15. Drive shaft, 16. Bearing, 17. Rotary servo motor, 18. Strain signal conditioning module, 19. Data acquisition module, 20. Microcontroller, and 21. Controller. Detailed Implementation

[0044] The present application is described in detail below with reference to the embodiments, but the present application is not limited to these embodiments.

[0045] Example 1

[0046] A digital calibration device for measuring the perpendicularity of internal holes comprises a mechanical structure, a transmission structure, and a calibration control structure;

[0047] The mechanical structure consists of a main body 1, a support body 2, an actuator cover 3, a calibration block 4, an HDMI port 7, an HTTP port 8, and connecting screws 14.

[0048] The transmission structure consists of a working component 5, a transmission shaft 15, a bearing 16, and a rotary servo motor 17.

[0049] The calibration control structure consists of a strain sensor 6, an input component 9, a display screen 10, an alarm 11, a switch button 12, a reset button 13, a strain signal conditioning module 18, a data acquisition module 19, a microcontroller 20, and a controller 21.

[0050] The main body 1 is a support and load-bearing component. The upper end of the main body 1 is fixedly connected to components such as support body 2, actuator cover 3, calibration block 4 and rotation servo motor 17. The components calibrated by the verticality detection tool can be integrated and used to provide support and placement.

[0051] The support body 2 is a support component. The support body 2 is fixedly installed on the upper end of the main body 1. The support body 2 is used to support the verticality detection tool, so as to keep the position of the internal hole verticality detection tool stable when performing digital calibration.

[0052] The actuator cover 3 is a protective component. A rotary servo motor 17 is installed inside the actuator cover 3. Placing the rotary servo motor 17 inside the actuator cover 3 can facilitate the rotation of the rotary servo motor 17 and protect it, so that the rotary servo motor 17 is in a relatively safe environment and avoids damage to it from external factors, thus playing a protective role.

[0053] The calibration block 4 is the main working component. The calibration block 4 is installed on the upper part of the main body 1. The verticality measuring tool can be calibrated and tested using the calibration block 4. During calibration, the servo motor 17 is rotated, which in turn drives the transmission shaft 15 to rotate synchronously. Subsequently, the working component 5 is rotated synchronously to adjust and change the angle between the working component 5 and the vertical direction. At this time, the inner hole verticality measuring tool is inserted into the calibration block 4 so that it contacts the strain sensor 6. The information displayed on the display screen 10 is checked to determine whether it is qualified or not.

[0054] The HDMI port 7 is an external expansion component. The HDMI port 7 is located on one side of the main body 1, which can easily expand the external digital display device and thus expand the display of information on the display screen 10.

[0055] The HTTP port 8 is a maintenance interface component. The HTTP port 8 is also located on one side of the host body 1 and is used to maintain the necessary programs and play the role of upgrading and updating programs.

[0056] The connecting screw 14 is the main connecting component, mainly used to realize the interconnection between various components. The use of connecting screws facilitates disassembly and maintenance, and improves maintenance efficiency.

[0057] The working component 5 is a calibration and testing component. Rotating the servo motor 17 drives the transmission shaft 15 to rotate synchronously, which in turn drives the working component 5 to rotate synchronously and adjust, changing the angle between the working component 5 and the vertical direction to simulate the angle of the workpiece to be calibrated and measured, and facilitating the insertion of the inner hole perpendicularity measuring tool into the working component 5.

[0058] The drive shaft 15 is the main transmission connection component. One end of the drive shaft 15 is fixedly connected to the output end of the rotary servo motor 17, and the other end of the drive shaft 15 is connected to the working component 5. The output end of the rotary servo motor 17 can be connected to the working component 5, so that the rotary servo motor 17 can drive the working component 5 to rotate and adjust the angle, thereby completing the selection of the angle required for calibration.

[0059] The bearing 16 is a connecting and protective component. The bearing 16 uses smooth metal balls or rollers and lubricated inner and outer metal surfaces to reduce friction, protect the connection between the output end of the rotating servo motor 17 and the transmission shaft 15, and prevent excessive wear from causing damage to the component.

[0060] The rotary servo motor 17 is the core power supply component. The rotary servo motor 17 can drive the transmission shaft 15 to rotate, which in turn drives the working component 5 to rotate, so that its angle can be adjusted, which facilitates the digital calibration and testing of the inner hole perpendicularity measuring tool.

[0061] The strain sensor 6 is a calibration sensing component. The angle between the working component 5 and the vertical direction is adjusted so that the verticality detection tool comes into contact with the strain sensor 6 for detection. The strain sensor 6 can detect the magnitude of the strain deformation and transmit the strain deformation to the data acquisition module 19 for further processing.

[0062] The input component 9 is a calibration input unit. When performing aperture verticality detection, the detection angle is input using the input component 9. After receiving the instruction input by the input component 9, the microcontroller 20 issues a control instruction to the controller 21 according to the logic relationship. After receiving the instruction, the controller 21 drives the rotation servo motor 17 to rotate, which in turn drives the transmission shaft 15 to rotate synchronously. Subsequently, it drives the working component 5 to rotate synchronously for adjustment, changing the angle between the working component 5 and the vertical direction. The angle input by the input component 9 can be used to conveniently set the inner hole verticality measuring tool to the required angle.

[0063] The display screen 10 is a display component. The display screen 10 is set on the upper surface of the main body 1 and is used to display calibration results and pass / fail criteria, so that the calibration data can be displayed more intuitively.

[0064] The alarm 11 is an alarm component. The alarm 11 is installed on the main body 1. When the display screen 10 shows that the pass criterion is unqualified, the microcontroller 20 will transmit the unqualified command to the controller 21. The controller 21 will drive the alarm 11 to issue a warning alarm, which serves as an alarm prompt.

[0065] The switch button 12 is a start / stop component. The switch button 12 is installed on the main body 1 to realize the opening and stopping of the device. The switch button 12 can be used to conveniently and efficiently start and stop the digital calibration device, which facilitates the calibration work.

[0066] The reset button 13 is a reset component. The reset button 13 is installed on the main body 1. The reset button 13 can reset the value recording after the recording is completed. The secondary recording of the reset button 13 provides accuracy guarantee for the digital calibration of the inner hole verticality measuring tool. The alarm information can be canceled by the microcontroller 20 according to the reset button 13. The processed information will be transmitted to the controller 21 to drive the alarm 11 to turn off the alarm.

[0067] The data acquisition module 19 is an information acquisition component. The data acquisition module 19 can acquire the strain deformation amount sensed by the strain sensor 6 and transmit it to the strain signal conditioning module 18 so that it can convert the strain deformation amount into a voltage signal.

[0068] The strain signal conditioning module 18 is a signal conversion component. During operation, the strain signal conditioning module 13 is used to condition the strain signal and convert the deformation into voltage, which facilitates the subsequent data processing by the microcontroller 20 and the controller 21.

[0069] The microcontroller 20 is a signal processing component. It is installed inside the main body 1. The microcontroller 20 receives the voltage signal processed by the strain signal conditioning module 18 and compares it with the set voltage (the set voltage is 0.1V-0.15V as the qualified range). It then generates a control command and transmits it to the controller 21. The controller 21 issues control commands to the microcontroller 15 to drive the alarm 11 to work or not. The controller 21 is a control transmission component. It can drive the servo motor 17 to rotate according to the signal transmitted by the microcontroller 20, thereby driving the transmission shaft 15 to rotate synchronously. Subsequently, it drives the working component 5 to rotate synchronously and adjust, changing the angle between the working component 5 and the vertical direction, or driving the alarm 11 to work or not according to the command, thus realizing the transmission and issuance of control commands.

[0070] The specific work process is as follows:

[0071] 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.

[0072] Step 2: Press the power button 12 to turn on the digital calibration device, check the continuity of the calibration device circuit, and ensure that the calibration device is functioning properly.

[0073] Step 3: According to the requirements, input the required angle information through input component 9, and adjust the working component 5 to the required position;

[0074] Step 4: Place the aperture perpendicularity measuring tool to be calibrated inside the working component 5, and observe the data displayed on the display screen 10 and the pass / fail judgment status;

[0075] Step 5: When the display screen 10 shows a qualified result but the countersunk head measuring tool is unqualified, the alarm 11 will emit a flashing red light as a warning;

[0076] Step 6: Press the reset button 13 to clear the alarm information of the alarm 11, and repeat step 4 to retest in order to increase the reliability of calibration;

[0077] Step 7: After calibrating the aperture perpendicularity measuring tools in sequence, press the power button 12 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.

[0078] 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 perpendicularity of internal holes, characterized in that, It consists of a mechanical structure, a transmission structure, and a calibration and control structure; The mechanical structure consists of a main body (1), a support body (2), an actuator cover (3), a calibration block (4), an HDMI port (7), an HTTP port (8), and connecting screws (14). The transmission structure consists of a working component (5), a transmission shaft (15), a bearing (16), and a rotary servo motor (17); The calibration control structure consists of a strain sensor (6), an input component (9), a display screen (10), an alarm (11), a switch button (12), a reset button (13), a strain signal conditioning module (18), a data acquisition module (19), a microcontroller (20), and a controller (21); The calibration block (4) is a working component; The working component (5) is a calibration and testing component; The strain sensor (6) is a calibration sensing component; The calibration block (4) is installed on the upper end of the main body (1), and the working component (5) is set inside the calibration block (4). The verticality detection tool can be calibrated and tested using the calibration block (4). During calibration, the servo motor (17) rotates, which in turn drives the transmission shaft (15) to rotate synchronously. Subsequently, the working component (5) rotates synchronously to adjust and change the angle between the working component (5) and the vertical direction, simulating the angle of the workpiece to be calibrated and measured. At this time, the inner hole verticality measuring tool is inserted into the working component (5) of the calibration block (4) so ​​that it comes into contact with the strain sensor (6). The strain sensor (6) can detect the magnitude of the strain deformation. The data acquisition module (19) acquires the analog signal and transmits it to the strain signal conditioning module (18). The strain signal conditioning module (18) converts the model signal into a digital signal and transmits the digital signal to the microcontroller (20) for data processing. The information displayed on the display screen (10) is viewed to determine whether it is qualified or not.

2. The digital calibration device for measuring the perpendicularity of an internal hole according to claim 1, characterized in that, The main body (1) is a support and load-bearing component. The upper end of the main body (1) is fixedly connected to a support body (2), an actuation cover (3), a calibration block (4) and a rotation servo motor (17) component. The components calibrated by the calibration verticality detection tool can be integrated and used to support and place the device. The support body (2) is a support component. The support body (2) is fixedly installed on the upper end of the main body (1). The support body (2) is used to support the verticality detection tool, so as to keep the position of the internal hole verticality detection tool stable when performing digital calibration of the internal hole verticality detection tool. The actuator cover (3) is a protective component. A rotary servo motor (17) is installed inside the actuator cover (3). Placing the rotary servo motor (17) inside the actuator cover (3) can facilitate the rotation of the rotary servo motor (17) and protect it, so that the rotary servo motor (17) is in a relatively safe environment and avoids damage to it from external factors, thus playing a protective role.

3. The digital calibration device for measuring the perpendicularity of an internal hole according to claim 2, characterized in that, The HDMI port (7) is an external expansion component. The HDMI port (7) is located on one side of the host body (1). It can conveniently expand the external digital display device through the HDMI port, thereby expanding the display of information on the display screen (10). The HTTP port (8) is a maintenance interface component. The HTTP port (8) is also located on one side of the host body (1) and is used to maintain the necessary programs and play the role of upgrading and updating programs. The connecting screw (14) is a connecting component used to realize the mutual connection between the components. The use of connecting screws facilitates disassembly and maintenance, and improves maintenance efficiency.

4. The digital calibration device for measuring the perpendicularity of an internal hole according to claim 3, characterized in that, The drive shaft (15) is a transmission connection component. One end of the drive shaft (15) is fixedly connected to the output end of the rotary servo motor (17), and the other end of the drive shaft (15) is connected to the working component (5). The output end of the rotary servo motor (17) can be connected to the working component (5), so that the rotary servo motor (17) can drive the working component (5) to rotate and adjust the angle, thereby completing the selection of the required angle for calibration. The bearing (16) is a connecting and protective component. The bearing (16) uses smooth metal balls or rollers and lubricated inner and outer ring metal surfaces to reduce friction, protect the connection between the output end of the rotating servo motor (17) and the transmission shaft (15), and prevent excessive wear from causing damage to the component. The rotating servo motor (17) is the core power supply component. The rotating servo motor (17) can drive the transmission shaft (15) to rotate, thereby driving the working component (5) to rotate, so as to adjust its angle and facilitate the digital calibration and detection of the inner hole perpendicularity measuring tool.

5. The digital calibration device for measuring the perpendicularity of an internal hole according to claim 4, characterized in that, The input component (9) is a calibration input unit. When performing aperture verticality detection, the detection angle is input using the input component (9). After receiving the instruction input by the input component (9), the microcontroller (20) issues a control instruction to the controller (21) according to the logical relationship. After receiving the instruction, the controller (21) drives the rotation servo motor (17) to rotate, which in turn drives the transmission shaft (15) to rotate synchronously. Subsequently, it drives the working component (5) to rotate synchronously and adjust, changing the angle between the working component (5) and the vertical direction. The angle input by the input component (9) can be used to conveniently set the inner hole verticality measuring tool to the required angle.

6. The digital calibration device for measuring the perpendicularity of an internal hole according to claim 5, characterized in that, The display screen (10) is a display component. The display screen (10) is set on the upper surface of the main body (1) and is used to display the calibration results and qualification criteria, so that the calibration data can be displayed more intuitively. The alarm (11) is an alarm component. The alarm (11) is installed on the host body (1). When the display screen (10) shows that the qualification criterion is unqualified, the microcontroller (20) will transmit the unqualified instruction to the controller (21). The controller (21) will drive the alarm (11) to issue a warning alarm, which serves as an alarm prompt. The switch button (12) is a start / stop component. The switch button (12) is installed on the main body (1) to realize the start and stop of the device. The switch button (12) can be used to start and stop the digital calibration device conveniently and efficiently, which facilitates the calibration work. The reset button (13) is a reset component. The reset button (13) is installed on the main body (1). The reset button (13) can reset the value recording after the recording is completed. The secondary recording of the reset button (13) provides accuracy guarantee for the digital calibration of the inner hole verticality measuring tool. The alarm information can be canceled by the microcontroller (20) according to the reset button (13). The processed information will be transmitted to the controller (21) to drive the alarm (11) to turn off the alarm.

7. The digital calibration device for measuring the perpendicularity of an internal hole according to claim 6, characterized in that, The data acquisition module (19) is an information acquisition component. The data acquisition module (19) can acquire the strain deformation amount sensed by the strain sensor (6) and transmit it to the strain signal conditioning module (18) so that it can convert the strain deformation amount into a voltage signal. The strain signal conditioning module (18) is a signal conversion component. When working, the strain signal conditioning module (13) is used to condition the strain signal and convert the deformation into voltage, so that the microcontroller (20) and controller (21) can process the data.

8. The digital calibration device for measuring the perpendicularity of an internal hole according to claim 7, characterized in that, The microcontroller (20) is a signal processing component. The microcontroller (20) is installed inside the main body (1). The microcontroller (20) receives the voltage signal processed by the strain signal conditioning module (18) and compares it with the set voltage to form a control command which is then transmitted to the controller (21). The controller (21) issues the control command to the microcontroller (20) to drive the alarm (11) to work or not. The controller (21) is a control transmission component. The controller (21) can drive the rotation servo motor (17) to rotate according to the signal transmitted by the microcontroller (20), thereby driving the transmission shaft (15) to rotate synchronously, and then driving the working component (5) to rotate synchronously to adjust and change the angle between the working component (5) and the vertical direction, or drive the alarm (11) to work or not according to the command, thereby realizing the transmission and issuance of control commands.

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