Calibration method and device of capacitive sensor signal, storage medium and computer equipment
By obtaining the safe calibration position of the processing contour during laser processing and performing calibration after the timing reaches the detection interval, the problem of the influence of capacitive sensor signal deviation on processing quality is solved, and accurate detection and efficient calibration of capacitive sensors are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HANS LASER TECH IND GRP CO LTD
- Filing Date
- 2023-09-11
- Publication Date
- 2026-07-07
AI Technical Summary
During laser processing, interference from high temperature and high pressure gases can cause deviations in the capacitance sensor signal, which existing calibration methods cannot accurately detect, thus affecting processing quality.
By obtaining the distance between the preset calibration position of each processing contour segment and the processed area and workpiece edge, a real-time calibration mark P is marked, and calibration is performed after the preset detection interval time is reached, ensuring accurate detection of the capacitive sensor position.
It achieves accurate calibration of the capacitive sensor signal, avoids processing quality problems caused by inaccurate calibration, and improves processing accuracy and efficiency.
Smart Images
Figure CN117346646B_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of laser processing technology, and more specifically, relates to a method, apparatus, storage medium and computer equipment for calibrating capacitive sensor signals. Background Technology
[0002] In laser processing, a capacitive sensor is typically used to detect the distance between the nozzle and the workpiece surface. The capacitive sensor converts changes in capacitance into an analog voltage signal, which is then used to calculate the current height of the nozzle above the workpiece surface. However, the high temperature and pressure gases generated during laser processing can interfere with the voltage signal output by the capacitive sensor, causing a deviation between the calculated height and the actual height. This affects processing quality; therefore, calibration of the capacitive sensor signal is necessary during the processing.
[0003] In related technologies, a counting method is typically used to calibrate the signal of a capacitive sensor. Once the count requirement is met, the current processing task is stopped to recalibrate the capacitive sensor. However, when the counting condition is met, the current position of the sensor cannot be detected, and there may be situations where there is no workpiece under the sensor. In this case, the calibration result will have a very large error, thus affecting the processing quality. Summary of the Invention
[0004] This application provides a calibration method for capacitive sensor signals, which can achieve accurate calibration of capacitive sensor signals and improve processing quality.
[0005] The technical solution adopted in this application embodiment is: to provide a calibration method for a capacitive sensor signal, including:
[0006] Obtain the first distance between the preset calibration position of each processing contour and the processed area, and the second distance between the preset calibration position and the workpiece edge. If the first distance is greater than or equal to the preset safety distance, and the second distance is greater than or equal to the preset safety distance, then mark the real-time calibration mark P at the preset calibration position of the processing contour.
[0007] Timing and processing of the nth segment of the contour;
[0008] Determine whether the nth segment of the processing contour has been completed. If the nth segment of the processing contour has been completed, compare the timing time T with the preset detection interval time B. If T≥B, then determine whether the (n+1)th segment of the processing contour has a real-time calibration mark P.
[0009] If there is a real-time calibration mark P for the (n+1)th machining contour, calibration is performed at the preset calibration position of the (n+1)th machining contour.
[0010] Furthermore, the preset calibration position is the starting point position of the processing contour.
[0011] Furthermore, the step "If the (n+1)th machining contour has a real-time calibration mark P, then calibration is performed at the preset calibration position of the (n+1)th machining contour" specifically includes:
[0012] If there is a real-time calibration mark P on the (n+1)th segment of the machining contour, move the machining head to the preset calibration position of the (n+1)th segment of the machining contour;
[0013] Raise the height of the processing head from the preset cutting plane height H1 to the preset detection height H2;
[0014] The capacitance sensor signal is calibrated.
[0015] Furthermore, after the step "determine whether the nth segment of the processing contour has been completed; if the nth segment of the processing contour has been completed, compare the timing time T with the preset detection interval time B; if T≥B, then determine whether the (n+1)th segment of the processing contour has a real-time calibration mark P", it also includes:
[0016] If the (n+1)th processing contour does not have a real-time calibration mark P, then the (n+1)th processing contour is not calibrated, and the (n+1)th processing contour is processed directly until the (n+1)th processing contour is completed.
[0017] Furthermore, after the step "If the (n+1)th processing contour does not have a real-time calibration mark P, then the (n+1)th processing contour is not calibrated, and the (n+1)th processing contour is directly processed until the (n+1)th processing contour is completed", it also includes:
[0018] After the (n+1)th processing contour is completed, the timing time T is compared with the preset detection interval time B. If T ≥ 2B, then the preset calibration position of the (n+2)th processing contour is calibrated; if T < 2B, then the calibration operation is not performed on the (n+2)th processing contour, and the (n+2)th processing contour is processed directly.
[0019] Furthermore, in the step "determine whether the nth segment of the processing contour has been completed; if the nth segment of the processing contour has been completed, compare the timing time T with the preset detection interval time B; if T≥B, then determine whether the (n+1)th segment of the processing contour has a real-time calibration mark P",
[0020] If T < B, the operation of "determining whether the (n+1)th segment of the machining contour has a real-time calibration mark P" is not executed, and the (n+1)th segment of the machining contour is directly processed.
[0021] Furthermore, after the step "If the (n+1)th machining contour has a real-time calibration mark P, then calibration is performed at the preset calibration position of the (n+1)th machining contour", it also includes:
[0022] Once the preset calibration position of the (n+1)th machining contour is calibrated, the timing time T is reset to zero, the timing is restarted, and machining of the (n+1)th machining contour continues.
[0023] This application also provides a calibration device for a capacitive sensor signal, comprising:
[0024] The acquisition module is used to acquire the first distance between the preset calibration position of each processing contour and the processed area, and the second distance between the preset calibration position and the workpiece edge. If the first distance is greater than or equal to the preset safety distance, and the second distance is greater than or equal to the preset safety distance, then a real-time calibration mark P is marked at the preset calibration position of the processing contour.
[0025] The timing and machining module is used to time and process the nth machining contour.
[0026] The judgment module is used to determine whether the nth segment of the processing contour has been completed. If the nth segment of the processing contour has been completed, the timing time T is compared with the preset detection interval time B; if T ≥ B, then it is determined whether the (n+1)th segment of the processing contour has a real-time calibration mark P; and,
[0027] The calibration module is used to calibrate at the preset calibration position of the (n+1)th segment of the machining contour when a real-time calibration mark P exists.
[0028] This application also provides a computer device, including:
[0029] A processor is configured to execute computer-executable instructions;
[0030] The memory stores one or more computer-executable instructions that, when executed by the processor, implement the various steps of the calibration method for the capacitive sensor signal as described above.
[0031] This application also provides a computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the various steps of the calibration method for the capacitive sensor signal as described above.
[0032] The beneficial effects of the calibration method for the capacitive sensor signal provided in this application embodiment are as follows: by obtaining the first distance between the preset calibration position of each processing contour and the processed area, and the second distance between the preset calibration position and the edge of the workpiece, if the first distance is greater than or equal to the preset safety distance, and the second distance is greater than or equal to the preset safety distance, a real-time calibration mark P is marked at the preset calibration position of the processing contour. Calibration is only performed at the preset calibration position of the processing contour when the timing time T is greater than or equal to the preset detection interval time B and the real-time calibration mark P is detected. Thus, the position of the capacitive sensor can be accurately detected before calibration, making the detection more accurate and reliable. This avoids the situation where there is no workpiece under the capacitive sensor or the distance to the processed area is too small during calibration, which would lead to inaccurate calibration and affect the processing quality. Attached Figure Description
[0033] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0034] Figure 1 This is a schematic flowchart illustrating the calibration method for the capacitive sensor signal provided in an embodiment of this application.
[0035] Figure 2 This is a schematic diagram showing the relationship between the workpiece and the cutting plane height H1 and the preset detection height H2 during the calibration of the capacitive sensor signal provided in the embodiments of this application.
[0036] Figure 3 This is a schematic diagram illustrating the specific process of the calibration method for the capacitive sensor signal provided in the embodiments of this application.
[0037] The following are the labeling elements in the figure:
[0038] 10. Workpiece. Detailed Implementation
[0039] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0040] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0041] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on this application.
[0042] Furthermore, the terms "first" and "second" are used 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 as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0043] Please see Figure 1 The calibration method for the capacitive sensor signal provided in the embodiments of this application will now be described. The calibration method for the capacitive sensor signal provided in the embodiments of this application can be used to calibrate the capacitive sensor signal on the processing head during laser processing, thereby enabling the detection of the distance between the processing head and the workpiece.
[0044] The calibration method for the capacitive sensor signal in this application includes steps S100, S300, S500, and S700.
[0045] S100. Obtain the first distance between the preset calibration position of each processing contour and the processed area, and the second distance between the preset calibration position and the workpiece edge. If the first distance is greater than or equal to the preset safety distance, and the second distance is greater than or equal to the preset safety distance, then mark the real-time calibration mark P at the preset calibration position of the processing contour.
[0046] In step S100, the machining of the workpiece typically consists of multiple machining contours. The machining head processes each machining contour sequentially in a certain order. For example, when the machining head finishes machining the nth machining contour, it pauses machining and moves to the position of the (n+1)th machining contour to process it. After the (n+1)th machining contour is completed, it processes the (n+2)th machining contour, and so on, until all machining contours are completed. Here, n can be a natural number such as 1, 2, 3, 4, ...
[0047] The process of "obtaining the first distance between the preset calibration position of each machining contour segment and the machined area, and the second distance between the machined area and the workpiece edge" can be generated into the NC file by CAM software. The CAM software uses the preset calibration position of each machining contour segment as the center and a preset safety distance as the radius to detect whether a machined area and a workpiece edge exist within this circle. If neither exists, it indicates that the first distance between the preset calibration position of that machining contour segment and the machined area is greater than or equal to the preset safety distance, and the second distance between the machined contour segment and the workpiece edge is greater than or equal to the preset safety distance. This indicates that the current preset calibration position is a safe calibration area, and a real-time calibration mark P can be marked at the preset calibration position of that machining contour segment. The CAM software calculates the calibration position based on the set calibration safety range and outputs the real-time calibration mark, ensuring the safe and reliable position below the capacitive sensor during calibration.
[0048] S300, timing and processing the nth segment of the machining contour.
[0049] In step S300, n can be a natural number such as 1, 2, 3, 4, ... A timer can be used for timing.
[0050] S500. Determine whether the nth segment of the processing contour has been completed. If the nth segment of the processing contour has been completed, compare the timing time T with the preset detection interval time B. If T≥B, then determine whether the (n+1)th segment of the processing contour has a real-time calibration mark P.
[0051] In step S500, it is first determined whether the nth segment of the machining contour has been completed. If the nth segment is completed, the timing time T is compared with the preset detection interval time B. When T≥B, it is then determined whether the (n+1)th segment of the machining contour has a real-time calibration mark P. By only checking the real-time calibration mark P of the (n+1)th segment of the machining contour when T≥B, the processing efficiency can be avoided due to frequent calibration. The preset detection interval time B can be set in advance.
[0052] S700. If there is a real-time calibration mark P on the (n+1)th machining contour, then calibration is performed at the preset calibration position of the (n+1)th machining contour.
[0053] In step S700, when a real-time calibration mark P is detected in the (n+1)th segment of the machining contour, calibration is performed at the preset calibration position of the (n+1)th segment of the machining contour. That is, before calibration, the current position of the capacitance sensor is also detected to avoid inaccurate calibration caused by the absence of a workpiece below the capacitance sensor or the small distance between the capacitance sensor and the machined area during calibration, which would affect the machining quality.
[0054] The calibration method for the capacitive sensor signal provided in this application embodiment obtains a first distance between the preset calibration position of each processing contour and the processed area, and a second distance between the preset calibration position and the workpiece edge. If the first distance is greater than or equal to a preset safety distance, and the second distance is greater than or equal to the preset safety distance, a real-time calibration mark P is marked at the preset calibration position of the processing contour. Calibration is only performed at the preset calibration position of the processing contour when the timing time T is greater than or equal to a preset detection interval time B and the real-time calibration mark P is detected. This allows for accurate detection of the position of the capacitive sensor before calibration, making the detection more accurate and reliable. It avoids inaccurate calibration caused by the absence of a workpiece below the capacitive sensor or the small distance between the sensor and the processed area during calibration, which could affect the processing quality.
[0055] The preset calibration position can be the starting point of the machining contour. By setting the starting point of the machining contour to the preset calibration position, calibration can be performed before machining begins. This ensures that there is a workpiece below the capacitive sensor and avoids inaccurate calibration data caused by the workpiece lifting up during machining.
[0056] Step S100, "obtain the first distance between the preset calibration position of each machining contour and the machined area, and the second distance between the machined contour and the workpiece edge; if the first distance is greater than or equal to the preset safety distance, and the second distance is greater than or equal to the preset safety distance, then mark the real-time calibration mark P at the preset calibration position of the machining contour," may further include step S200:
[0057] S200. If at least one of the first distance and the second distance is less than the preset safety distance, the preset calibration position of the processing contour is not marked with the real-time calibration mark P.
[0058] In step S200, "at least one of the first distance and the second distance is less than the preset safety distance" can mean that the first distance is less than the preset safety distance and the second distance is greater than or equal to the preset safety distance. Alternatively, it can mean that the first distance is greater than or equal to the preset safety distance and the second distance is less than the preset safety distance. Or, both the first distance and the second distance are less than the preset safety distance. When at least one of the first distance and the second distance is less than the preset safety distance, the preset calibration position of the machining contour is not marked with the real-time calibration mark P. This avoids inaccurate calibration caused by the absence of a workpiece below the capacitive sensor or an excessively small distance from the machined area, which could affect machining quality.
[0059] Please see Figure 2 The step S700, "If there is a real-time calibration mark P on the (n+1)th segment of the machining contour, then calibration is performed at the preset calibration position of the (n+1)th segment of the machining contour", may specifically include: S710, S720, and S730.
[0060] S710. If there is a real-time calibration mark P on the (n+1)th segment of the machining contour, move the machining head to the preset calibration position of the (n+1)th segment of the machining contour.
[0061] S720. Raise the height of the processing head from the preset cutting plane height H1 to the preset detection height H2.
[0062] S730 calibrates the capacitance sensor signal.
[0063] Because the signal from the capacitive sensor is significantly affected by the temperature of the workpiece 10 and waste residue, to ensure more stable and reliable detection data, the height of the machining head is raised from the preset cutting plane height H1 to the preset detection height H2 before calibration. After calibration, the height of the machining head is then lowered from the preset detection height H2 to the preset cutting plane height H1 for machining.
[0064] Please see Figure 3 After step S500, "Determine whether the nth segment of the processing contour has been completed; if the nth segment of the processing contour has been completed, compare the timing time T with the preset detection interval time B; if T≥B, then determine whether the (n+1)th segment of the processing contour has a real-time calibration mark P", it may also include:
[0065] S600. If there is no real-time calibration mark P for the (n+1)th machining contour, then the (n+1)th machining contour is not calibrated, and the (n+1)th machining contour is directly processed until the (n+1)th machining contour is completed.
[0066] In step S600, if the (n+1)th machining contour does not have a real-time calibration mark P, then calibration of the (n+1)th machining contour is not required to avoid the absence of a workpiece below the capacitive sensor or the distance from the processed area being too small during calibration. That is, when the (n+1)th machining contour does not have a real-time calibration mark P, the calibration operation is not performed, but the (n+1)th machining contour is directly processed until the (n+1)th machining contour is completed.
[0067] Please see Figure 3 After step S600, "If the (n+1)th machining contour does not have a real-time calibration mark P, then the (n+1)th machining contour is not calibrated, and the (n+1)th machining contour is directly machined until the (n+1)th machining contour is completed," it may also include:
[0068] After the (n+1)th processing contour is completed, the timing time T is compared with the preset detection interval time B. If T ≥ 2B, the preset calibration position of the (n+2)th processing contour is calibrated; if T < 2B, the calibration operation is not performed on the (n+2)th processing contour, and the (n+2)th processing contour is processed directly.
[0069] When T≥2B, calibration is performed at the preset calibration position of the processing contour in the (n+2)th segment. This avoids the problem of inaccurate capacitance sensor signals caused by the inability to calibrate the capacitance sensor due to the failure to detect the real-time calibration mark P for a long time.
[0070] Please see Figure 3 In step S500, "Determine whether the nth segment of the processing contour has been completed. If the nth segment of the processing contour has been completed, compare the timing time T with the preset detection interval time B; if T≥B, then determine whether the (n+1)th segment of the processing contour has a real-time calibration mark P,"
[0071] If T < B, the operation of "determining whether the (n+1)th segment of the machining contour has a real-time calibration mark P" is not executed, and the (n+1)th segment of the machining contour is directly processed.
[0072] During calibration, the machining head will stop machining. To avoid frequent calibration affecting machining efficiency, when the timing time T is less than the preset detection interval time B, the operation of "determining whether the (n+1)th machining contour has a real-time calibration mark P" will not be executed, and the (n+1)th machining contour will be machined directly.
[0073] Please see Figure 3 Step S700: If the (n+1)th machining contour has a real-time calibration mark P, then calibration is performed at the preset calibration position of the (n+1)th machining contour. This is followed by:
[0074] S800: After the preset calibration position of the (n+1)th machining contour is calibrated, the timing time T is reset to zero, the timing is restarted, and the machining of the (n+1)th machining contour continues.
[0075] After calibration in step S700, proceed to step S800 to process the (n+1)th segment of the calibrated machining contour. Continue in this manner until all machining contours are processed.
[0076] Please see Figure 3 In step S500, "determine whether the nth segment of the processing contour has been completed. If the nth segment of the processing contour has been completed, compare the timing time T with the preset detection interval time B." If the nth segment of the processing contour has not been completed, continue processing the nth segment of the processing contour until the nth segment of the processing contour is completed, and then compare the timing time T with the preset detection interval time B.
[0077] Please see Figure 3 In one specific embodiment of this application, a method for calibrating a capacitive sensor signal is provided, which may specifically include the following steps:
[0078] A1. The CNC first loads the NC file containing the task to be processed. The CNC calls the process database and reads the process parameters. The compiler compiles the NC file, obtains the detection parameters, and initializes the parameters. Among them, the detection parameters can be the sensor measurement range, timing time value T, tolerance A, detection interval time B (min), filter value, and other detection parameters.
[0079] A2. Process the outline and start the timer.
[0080] A3. Determine whether the current processing contour has been completed. If yes, proceed to step A4; otherwise, skip to step A5.
[0081] A4. Compare the timing time T with the preset detection interval time B. If T≥B, proceed to step A6; otherwise, skip to step A5.
[0082] A5. If the current machining contour has not been completed, continue machining the current machining contour.
[0083] A6. If T≥B, then determine whether the next segment of the processing contour has a real-time calibration mark P. If yes, proceed to step A7. Otherwise, skip to step A8.
[0084] A7. When the next segment of the machining contour has a real-time calibration mark P, move to the starting position of the contour of the next segment and execute step A9.
[0085] A8. If the subsequent machining contour does not have a real-time calibration mark P, then continue machining the subsequent machining contour.
[0086] A9. Increase the height of the processing head from the preset cutting plane height H1 to the preset detection height H2 to calibrate the capacitive sensor signal.
[0087] A10. After step A8 completes the processing of the next segment of the contour, the timing time T is compared with the preset detection interval time B. If T ≥ 2B, then jump to step A7; otherwise, jump to step A5.
[0088] A11. After the calibration in step A9 is completed, reset the timer, restart the timing of time T, continue processing, and execute step A12.
[0089] A12. Determine whether the current processing task is completed. If yes, stop; otherwise, return to step A2.
[0090] This application also provides a calibration device for capacitive sensor signals, including: an acquisition module, a timing processing module, a judgment module, and a calibration module.
[0091] The acquisition module is used to acquire the first distance between the preset calibration position of each processing contour and the processed area, and the second distance between the preset calibration position and the workpiece edge. If the first distance is greater than or equal to the preset safety distance, and the second distance is greater than or equal to the preset safety distance, then a real-time calibration mark P is marked at the preset calibration position of the processing contour.
[0092] The timing and machining module is used to time and process the nth machining contour.
[0093] The judgment module is used to determine whether the nth segment of the processing contour has been completed. If the nth segment of the processing contour has been completed, the timing time T is compared with the preset detection interval time B. If T≥B, it is determined whether the (n+1)th segment of the processing contour has a real-time calibration mark P.
[0094] The calibration module is used to calibrate at the preset calibration position of the (n+1)th segment of the machining contour when a real-time calibration mark P exists.
[0095] This application also provides a computer device, including:
[0096] A processor is configured to execute computer-executable instructions;
[0097] The memory stores one or more computer-executable instructions that, when executed by a processor, implement the various steps of the calibration method for the capacitive sensor signal in any of the above embodiments.
[0098] The memory, as a computer-readable storage medium, can be used to store software programs, computer-executable programs, and modules, such as the program instructions corresponding to the calibration method for the capacitive sensor signal in the embodiments of this application. The processor implements the calibration method for the capacitive sensor signal in any of the above embodiments by running the software programs, instructions, and modules stored in the memory.
[0099] The memory may primarily comprise a program storage area and a data storage area. The program storage area may store the operating system and at least one application program required for a given function; the data storage area may store data created based on terminal usage. Furthermore, the memory may include high-speed random access memory (RAM) and non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid-state storage device. Examples of the aforementioned networks include, but are not limited to, the Internet, intranets, local area networks (LANs), mobile communication networks, and combinations thereof.
[0100] This application also provides a computer-readable storage medium storing a computer program thereon, which is executed by a processor to implement the various steps of the calibration method for the capacitive sensor signal in any of the above embodiments.
[0101] Based on the above description of the implementation methods, those skilled in the art can clearly understand that the present invention can be implemented using software and necessary general-purpose hardware, and of course, it can also be implemented using hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk, or optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods of the various embodiments of the present invention.
[0102] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A method for calibrating a capacitive sensor signal, characterized in that, include: Obtain the first distance between the preset calibration position of each processing contour and the processed area, and the second distance between the preset calibration position and the workpiece edge. If the first distance is greater than or equal to the preset safety distance, and the second distance is greater than or equal to the preset safety distance, then mark the real-time calibration mark P at the preset calibration position of the processing contour. Timing and processing of the nth segment of the contour; Determine whether the nth segment of the processing contour has been completed. If the nth segment of the processing contour has been completed, compare the timing time T with the preset detection interval time B. If T≥B, then determine whether the (n+1)th segment of the processing contour has a real-time calibration mark P. If there is a real-time calibration mark P for the (n+1)th machining contour, calibration is performed at the preset calibration position of the (n+1)th machining contour.
2. The calibration method for the capacitive sensor signal according to claim 1, characterized in that, The preset calibration position is the starting position of the processing contour.
3. The calibration method for the capacitive sensor signal according to claim 1, characterized in that, The step "If the (n+1)th machining contour has a real-time calibration mark P, then perform calibration at the preset calibration position of the (n+1)th machining contour" specifically includes: If there is a real-time calibration mark P on the (n+1)th segment of the machining contour, move the machining head to the preset calibration position of the (n+1)th segment of the machining contour; Raise the height of the processing head from the preset cutting plane height H1 to the preset detection height H2; The capacitance sensor signal is calibrated.
4. The calibration method for the capacitive sensor signal according to claim 1, characterized in that, The step "Determine whether the nth segment of the machining contour has been completed. If the nth segment is completed, compare the timing time T with the preset detection interval time B; if T ≥ B, then determine whether the (n+1)th segment of the machining contour has a real-time calibration mark P" further includes: If the (n+1)th processing contour does not have a real-time calibration mark P, then the (n+1)th processing contour is not calibrated, and the (n+1)th processing contour is processed directly until the (n+1)th processing contour is completed.
5. The calibration method for the capacitive sensor signal according to claim 4, characterized in that, The step "If the (n+1)th machining contour does not have a real-time calibration mark P, then the (n+1)th machining contour is not calibrated, and the (n+1)th machining contour is directly processed until the (n+1)th machining contour is completed" further includes: After the (n+1)th processing contour is completed, the timing time T is compared with the preset detection interval time B. If T ≥ 2B, then the preset calibration position of the (n+2)th processing contour is calibrated; if T < 2B, then the calibration operation is not performed on the (n+2)th processing contour, and the (n+2)th processing contour is processed directly.
6. The calibration method for the capacitive sensor signal according to any one of claims 1-5, characterized in that, In the step "Determine whether the nth segment of the machining contour has been completed. If the nth segment is completed, compare the timing time T with the preset detection interval time B; if T ≥ B, then determine whether the (n+1)th segment of the machining contour has a real-time calibration mark P", If T < B, the operation of "determining whether the (n+1)th segment of the processing contour has a real-time calibration mark P" is not executed, and the (n+1)th segment of the processing contour is processed directly.
7. The calibration method for the capacitive sensor signal according to any one of claims 1-5, characterized in that, The step "If the (n+1)th machining contour has a real-time calibration mark P, then perform calibration at the preset calibration position of the (n+1)th machining contour" also includes: Once the preset calibration position of the (n+1)th machining contour is calibrated, the timing time T is reset to zero, the timing is restarted, and machining of the (n+1)th machining contour continues.
8. A calibration device for a capacitive sensor signal, characterized in that, include: The acquisition module is used to acquire the first distance between the preset calibration position of each processing contour and the processed area, and the second distance between the preset calibration position and the workpiece edge. If the first distance is greater than or equal to the preset safety distance, and the second distance is greater than or equal to the preset safety distance, then a real-time calibration mark P is marked at the preset calibration position of the processing contour. The timing and machining module is used to time and process the nth machining contour. The judgment module is used to determine whether the nth segment of the processing contour has been completed. If the nth segment of the processing contour has been completed, the timing time T is compared with the preset detection interval time B; if T ≥ B, then it is determined whether the (n+1)th segment of the processing contour has a real-time calibration mark P; and, The calibration module is used to calibrate at the preset calibration position of the (n+1)th segment of the machining contour when a real-time calibration mark P exists.
9. A computer device, characterized in that, include: A processor is configured to execute computer-executable instructions; The memory stores one or more computer-executable instructions, which, when executed by the processor, implement the steps of the calibration method for the capacitive sensor signal according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that: It stores a computer program, which is executed by a processor to implement the steps of the calibration method for the capacitive sensor signal according to any one of claims 1 to 7.