Capacitance calibration method and system suitable for multi-angle laser cutting

Abstract

The invention discloses a capacitance calibration method suitable for multi-angle laser cutting, and the method comprises the following steps: (1) collecting capacitance curves of a cutting head at different inclination angles and different plate heights; (2) after calibration of one inclination angle data is completed, the inclination angle is automatically adjusted according to a set angle interval, and calibration is conducted again till the inclination angle of the cutting head is larger than the maximum calibration inclination angle; and (3) the above processing process is repeated until each inclination angle completes capacitance calibration, so that distance-capacitance mapping tables corresponding to different angles are obtained, and reference data are provided for subsequent angle capacitance compensation. The invention also relates to a corresponding system. By the adoption of the capacitance calibration method and system suitable for multi-angle laser cutting, a user only needs to conduct calibration once, the distance plate height-capacitance mapping table of multiple angles can be obtained, capacitance curves of different distance plate heights of multiple angles are rapidly collected, and therefore the data collection efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the field of laser cutting, and in particular to a capacitance calibration method and a system thereof suitable for multi-angle laser cutting. Background Art

[0002] In the field of laser cutting, precise control of the distance between the cutting head and the plate is crucial to ensure cutting quality. Traditional methods of adjusting the height of the laser cutting head often rely on the acquisition of capacitance curves at a single angle. This method cannot adapt to the changing cutting environment and plate characteristics, resulting in limited cutting accuracy and efficiency. In addition, these methods usually require manual adjustment of the angle and distance of the cutting head, which is not only time-consuming and labor-intensive, but also difficult to automate and precisely control.

[0003] In the prior art, the more conventional capacitance calibration process is as follows:

[0004] Step 1: The cutting head is perpendicular to the plate surface and descends to the plate touch height;

[0005] Step 2: The cutting head is lifted at a calibrated speed, and the capacitance values ​​at different heights are recorded to obtain a distance-capacitance mapping table;

[0006] Step 3: Send the mapping table to the firmware.

[0007] The technical defects of the above process include: when the height from the board is the same, the capacitance value is positively correlated with the projection area of ​​the cutting head on the board surface. When the angle between the cutting head and the board surface changes, the projection area also changes, that is, the capacitance value is not a fixed value. If bevel cutting is performed, the following height will be wrong, or even the board will be hit.

[0008] Therefore, in view of the shortcomings of the existing technology, developing a capacitance curve acquisition method that can adapt to multiple angles and different heights from the board is of great significance to improving the automation level and cutting quality of laser cutting. Summary of the invention

[0009] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide a capacitance calibration method and system suitable for multi-angle laser cutting.

[0010] In order to achieve the above object, the capacitance calibration method and system applicable to multi-angle laser cutting of the present invention are as follows:

[0011] The capacitance calibration method applicable to multi-angle laser cutting has the following main features:

[0012] (1) Collecting capacitance curves of the cutting head at different inclination angles and different heights from the board;

[0013] (2) When the inclination angle data is calibrated, the inclination angle is automatically adjusted according to the set angle interval, and the calibration is performed again until the inclination angle of the cutting head is greater than the calibrated maximum inclination angle;

[0014] (3) Repeat the above process until the capacitance calibration is completed for each inclination angle, so as to obtain a distance-capacitance mapping table corresponding to different angles, so as to provide reference data for subsequent angle capacitance compensation.

[0015] Preferably, the method described herein swings the cutting head in the following manner during the calibration process:

[0016] A simple pendulum, where only the axis of rotation rotates and the reference point changes; or

[0017] Linked, reverse around the nozzle, the calibration point remains unchanged.

[0018] Preferably, the capacitance compensation is specifically:

[0019] The capacitance difference corresponding to the same height from the board as the current angle and the 0° angle is calculated through the distance-capacitance mapping table of the corresponding angle, so as to compensate the current capacitance.

[0020] The capacitance calibration system suitable for multi-angle laser cutting for implementing the above-mentioned method, wherein the system comprises:

[0021] The cutting head control module is responsible for controlling the rotation, swing and movement of the cutting head;

[0022] A capacitance detection module, connected to the cutting head control module, for detecting the capacitance value between the cutting head and the plate in real time;

[0023] An inclination adjustment module, connected to the cutting head control module, for adjusting the inclination of the cutting head;

[0024] A board height adjustment module, connected to the inclination angle adjustment module, for controlling the distance between the cutting head and the board; and

[0025] The data processing module is connected to the capacitance detection module and is used to process and analyze the collected capacitance value data.

[0026] The capacitance calibration method and system suitable for multi-angle laser cutting of the present invention have the following beneficial effects: 1. Improve acquisition efficiency: By automatically adjusting the inclination angle of the cutting head and performing continuous calibration, the technical solution can quickly collect capacitance curves at multiple angles and different heights from the plate, significantly improving the efficiency of data acquisition. 2. Enhance data accuracy: Using two swinging modes, single pendulum and linkage, the technical solution can flexibly select according to different calibration requirements to ensure that the collected capacitance curve data is more accurate. 3. Improve laser cutting quality: By accurately collecting capacitance curves at different angles and heights, the technical solution helps to optimize laser cutting parameters, thereby improving cutting quality. 4. Strong adaptability: The technical solution can adapt to different cutting head inclination angles and swinging modes, has strong adaptability and flexibility, and is suitable for a variety of laser cutting scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a method for calibrating capacitance suitable for multi-angle laser cutting in the present invention, which shows the relationship among capacitance, angle and height in practical application.

[0028] Figure 2 It is a schematic diagram of multi-angle capacitance calibration parameters of the capacitance calibration method suitable for multi-angle laser cutting of the present invention.

[0029] Figure 3 The present invention is a flow chart of performing multi-angle capacitance calibration processing in a specific embodiment of the capacitance calibration method suitable for multi-angle laser cutting of the present invention. DETAILED DESCRIPTION

[0030] In order to more clearly describe the technical content of the present invention, further description is given below in conjunction with specific embodiments.

[0031] Before describing in detail embodiments according to the present invention, it should be noted that, hereinafter, the terms "comprises", "includes" or any other variations are intended to cover non-exclusive inclusion, whereby a process, method, article or apparatus comprising a series of elements includes not only these elements, but also other elements not explicitly listed or inherent to such process, method, article or apparatus.

[0032] The capacitance calibration method applicable to multi-angle laser cutting comprises the following steps:

[0033] (1) Collecting capacitance curves of the cutting head at different inclination angles and different heights from the board;

[0034] (2) When the inclination angle data is calibrated, the inclination angle is automatically adjusted according to the set angle interval, and the calibration is performed again until the inclination angle of the cutting head is greater than the calibrated maximum inclination angle;

[0035] (3) Repeat the above process until the capacitance calibration is completed for each inclination angle, so as to obtain a distance-capacitance mapping table corresponding to different angles, so as to provide reference data for subsequent angle capacitance compensation.

[0036] As a preferred embodiment of the present invention, the method described herein swings the cutting head in the following manner during the calibration process:

[0037] A simple pendulum, where only the axis of rotation rotates and the reference point changes; or

[0038] Linked, reverse around the nozzle, the calibration point remains unchanged.

[0039] As a preferred embodiment of the present invention, the capacitance compensation is specifically as follows:

[0040] The capacitance difference corresponding to the same height from the board as the current angle and the 0° angle is calculated through the distance-capacitance mapping table of the corresponding angle, so as to compensate the current capacitance.

[0041] The capacitance calibration system suitable for multi-angle laser cutting for implementing the above-mentioned method, wherein the system comprises:

[0042] The cutting head control module is responsible for controlling the rotation, swing and movement of the cutting head;

[0043] A capacitance detection module, connected to the cutting head control module, for detecting the capacitance value between the cutting head and the plate in real time;

[0044] An inclination adjustment module, connected to the cutting head control module, for adjusting the inclination of the cutting head;

[0045] A board height adjustment module, connected to the inclination angle adjustment module, for controlling the distance between the cutting head and the board; and

[0046] The data processing module is connected to the capacitance detection module and is used to process and analyze the collected capacitance value data.

[0047] See also Figure 3 As shown, in a specific embodiment of the present invention, the processing flow of the capacitance calibration method suitable for multi-angle laser cutting of the technical solution is as follows:

[0048] 1. Set the groove angle to 0°;

[0049] 2. Determine whether the current groove angle is greater than the calibrated maximum inclination angle. If so, directly send the distance-capacitance mapping table at 0° to the firmware; otherwise, proceed to the next step;

[0050] 3. Lower the cutting head to the height of the touch plate;

[0051] 4. Lift the calibration length at the calibration speed and record the distance-capacitance mapping table;

[0052] 5. Increase the groove angle by the calibrated angle interval and return to step 2 to judge again.

[0053] illustrate:

[0054] (1) Calibrate the rotation axis: 0: A axis; 1: B axis. The axis that rotates during calibration only supports single-axis rotation.

[0055] (2) Calibration of the cutting head swing mode: 0: Single swing, only the rotation axis rotates, the calibration point changes. 1: Linkage, rotates around the nozzle, the calibration point remains unchanged.

[0056] In practical applications, please refer to Figure 2 As shown, the calibration method is as follows:

[0057] 1. Open the follow-up control page;

[0058] 2. Set the "calibration settings" parameters;

[0059] 3. Lower the cutting head until it is close to the board surface;

[0060] 4. Click the "Calibrate" button to start calibration;

[0061] 5. Wait for the calibration to complete.

[0062] One-click calibration (calibration data is required to use)

[0063] 1. Open the follow-up control page;

[0064] 2. Set the "calibration settings" parameters;

[0065] 3. Click the "One-key calibration" button to start calibration;

[0066] 4. Wait for the calibration to complete.

[0067] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present invention includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present invention belong.

[0068] It should be understood that each part of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution device.

[0069] A person of ordinary skill in the art may understand that all or part of the steps of the method for implementing the above-mentioned embodiment may be completed by instructing the relevant hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one of the steps of the method embodiment or a combination thereof.

[0070] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc.

[0071] In the description of this specification, the description with reference to the terms "an embodiment", "some embodiments", "example", "specific example", or "embodiment" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0072] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

[0073] The capacitance calibration method and system suitable for multi-angle laser cutting of the present invention have the following beneficial effects: 1. Improve acquisition efficiency: By automatically adjusting the inclination angle of the cutting head and performing continuous calibration, the technical solution can quickly collect capacitance curves at multiple angles and different heights from the plate, significantly improving the efficiency of data acquisition. 2. Enhance data accuracy: Using two swinging modes, single pendulum and linkage, the technical solution can flexibly select according to different calibration requirements to ensure that the collected capacitance curve data is more accurate. 3. Improve laser cutting quality: By accurately collecting capacitance curves at different angles and heights, the technical solution helps to optimize laser cutting parameters, thereby improving cutting quality. 4. Strong adaptability: The technical solution can adapt to different cutting head inclination angles and swinging modes, has strong adaptability and flexibility, and is suitable for a variety of laser cutting scenarios.

[0074] In this specification, the present invention has been described with reference to specific embodiments thereof. However, it is apparent that various modifications and variations may be made without departing from the spirit and scope of the present invention. Therefore, the specification and drawings should be regarded as illustrative rather than restrictive.

Claims

1. A capacitance calibration method suitable for multi-angle laser cutting, characterized in that: The method comprises the following steps: (1) Collecting capacitance curves of the cutting head at different inclination angles and different heights from the board; (2) When the inclination angle data is calibrated, the inclination angle is automatically adjusted according to the set angle interval, and the calibration is performed again until the inclination angle of the cutting head is greater than the calibrated maximum inclination angle; (3) Repeat the above process until the capacitance calibration is completed for each inclination angle, so as to obtain a distance-capacitance mapping table corresponding to different angles, so as to provide reference data for subsequent angle capacitance compensation.

2. The capacitance calibration method suitable for multi-angle laser cutting according to claim 1, characterized in that: The method described herein swings the cutting head in the following manner during the calibration process: A simple pendulum, where only the axis of rotation rotates and the reference point changes; or Linked, reverse around the nozzle, the calibration point remains unchanged.

3. The capacitance calibration method suitable for multi-angle laser cutting according to claim 1, characterized in that: The capacitance compensation is specifically as follows: The capacitance difference corresponding to the same height from the board as the current angle and the 0° angle is calculated through the distance-capacitance mapping table of the corresponding angle, so as to compensate the current capacitance.

4. A capacitance calibration system suitable for multi-angle laser cutting for implementing the method according to any one of claims 1 to 3, characterized in that: The system comprises: The cutting head control module is responsible for controlling the rotation, swing and movement of the cutting head; A capacitance detection module, connected to the cutting head control module, for detecting the capacitance value between the cutting head and the plate in real time; An inclination adjustment module, connected to the cutting head control module, for adjusting the inclination of the cutting head; A board height adjustment module, connected to the inclination angle adjustment module, for controlling the distance between the cutting head and the board; and The data processing module is connected to the capacitance detection module and is used to process and analyze the collected capacitance value data.

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