A method for accurately determining when laser output power exceeds upper and lower limits and triggering an alarm.

Abstract

This invention provides a method for accurately determining whether a laser's output power exceeds its upper or lower limits and triggering an alarm. The method includes: acquiring the upper and lower limit range K of the laser's output power; setting a set output power A for the laser, where the upper and lower limits of the set output power A are A+K; acquiring the laser's acquired output power B; calibrating the acquired output power B and outputting the calibrated output power C; and comparing the calibrated output power C with the upper and lower limit ranges of the set output power A, i.e., comparing the value of C with the value of A+K. This invention allows for setting corresponding upper and lower limit ranges of laser output power, calibrating the acquired output power, accurately determining whether the laser's output power exceeds the upper or lower limits and triggering an alarm, ensuring accurate power output and reducing the possibility of false alarms.

Description

Technical Field

[0001] This invention relates to the field of laser technology, and in particular to a method for accurately determining when the output power of a laser exceeds its upper or lower limits and triggering an alarm. Background Technology

[0002] Fluctuations in laser output power have a significant impact on the welding of users' products. Generally speaking, the smaller the fluctuation value, the better. A smaller fluctuation value indicates that the laser output power deviates less from the set value and the power output is more accurate.

[0003] To address this fluctuation, users typically set upper and lower alarm limits for the output power to determine if the current laser output power is within the required range. Generally, a smaller alarm range is better. This is because the laser's output power detection and setting power are not linear (e.g., a set power of 1200W might result in the controller detecting an output power of 1283W, see...). Figure 2 This results in a large error between the detected output power and the set power. This error means that the upper and lower power alarm ranges cannot be set very small and there is a probability of false alarms. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a method for accurately determining whether the laser output power exceeds the upper or lower limits and triggering an alarm. The method allows for setting corresponding upper and lower limits for the laser output power, accurately determining whether the laser output power exceeds the upper or lower limits and triggering an alarm, ensuring accurate power output and reducing the possibility of false alarms.

[0005] The embodiments of the present invention are achieved through the following technical solutions: A method for accurately determining when a laser's output power exceeds its upper or lower limits and triggering an alarm includes the following steps: Step S100: Obtain the upper and lower limits K of the laser output power; Step S200: Set the laser's set output power A, that is, the upper and lower limits of the laser's set output power A are A+K; Step S300: Collect the output power B of the laser. Step S400: The laser is calibrated, its output power B is acquired, and the laser calibration output power C is output. Step S500: Compare the laser calibration output power C with the upper and lower limits of the laser set output power A, that is, compare the value of C with the value of A+K. In step S600, when the laser calibration output power C exceeds the upper and lower limits of the laser setting output power A, an alarm is triggered to stop laser output and an alarm signal is output. When the laser calibration output power C does not exceed the upper and lower limits of the laser setting output power A, steps S100 to S600 are repeated.

[0006] According to a preferred embodiment, the laser calibration output power C is obtained from the laser acquisition output power B using a formula. The specific formula relating the laser calibration output power C to the laser acquisition output power B is as follows: y=3.325E-05x 2.000E+00 +8.876E-01x+1.641E+01 Where Y represents the laser calibration output power C, and X represents the laser acquisition output power B.

[0007] According to a preferred embodiment, the upper and lower limits K of the laser's output power A are set to ±2%.

[0008] According to a preferred embodiment, the deviation between the laser's set output power A and the laser's calibrated output power C is within the range of -1.6% to 1.25%.

[0009] According to a preferred embodiment, the laser may be selected as a fiber laser, a semiconductor laser, a QCW laser, or a MOPA laser.

[0010] According to a preferred embodiment, the laser is a fiber laser with a rated power of 1500W and emits light at intervals of 150W.

[0011] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects: This invention allows setting corresponding upper and lower limits for laser output power. By calibrating the laser and collecting the output power B, and outputting the laser calibration output power C, the alarm range for judging the laser output power can be accurately adjusted. The corresponding upper and lower limits for laser output power can be set according to the power fluctuation range that the product can accept and the alarm range obtained above. This allows for accurate judgment of whether the laser output power exceeds the upper and lower limits and triggers an alarm. The power output is accurate and reduces the possibility of false alarms. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a flowchart illustrating a method for accurately determining when a laser's output power exceeds its upper or lower limits and triggering an alarm, as provided in an embodiment of the present invention. Figure 2The figure shows experimental data for an embodiment of the present invention that provides a method for accurately determining when the output power of a laser exceeds the upper or lower limit and triggering an alarm. Detailed Implementation

[0014] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0015] In the description of this invention, it should be noted that the terms "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 invention 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 invention.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Example

[0017] Please refer to Figures 1 to 2 A method for accurately determining when a laser's output power exceeds its upper or lower limits and triggering an alarm includes the following steps: Step S100: Obtain the upper and lower limits K of the laser output power; (This can be based on the acceptable power fluctuation range of the product). Step S200: Set the laser's set output power A, that is, the upper and lower limits of the laser's set output power A are A+K; Step S300: Collect the output power B of the laser. Step S400: The laser is calibrated, its output power B is acquired, and the laser calibration output power C is output. Step S500: Compare the laser calibration output power C with the upper and lower limits of the laser set output power A, that is, compare the value of C with the value of A+K. In step S600, when the laser calibration output power C exceeds the upper and lower limits of the laser setting output power A, an alarm is triggered to stop laser output and an alarm signal is output. When the laser calibration output power C does not exceed the upper and lower limits of the laser setting output power A, steps S100 to S600 are repeated.

[0018] Preferably, the laser calibration output power C is obtained from the laser acquisition output power B using a formula. The specific formula relating the laser calibration output power C to the laser acquisition output power B is as follows: y=3.325E-05x 2.000E+00 +8.876E-01x+1.641E+01 Where Y represents the laser calibration output power C, and X represents the laser acquisition output power B.

[0019] Preferably, the upper and lower limits K of the laser's output power A are set to ±2%. That is, A - 2% ≤ A + K ≤ A + 2%. Preferably, the deviation between the laser's set output power A and the laser's calibrated output power C is within the range of -1.6% to 1.25%.

[0020] Preferably, the laser can be selected as a fiber laser, semiconductor laser, QCW laser, or MOPA laser.

[0021] Preferably, the laser is a fiber laser with a rated power of 1500W and emits light at intervals of 150W.

[0022] Working principle of the invention: In this embodiment, the laser internally includes a setting unit, a data acquisition unit, a calibration unit, and a comparison unit. The setting unit sets the upper and lower limits K of the laser output power and the set output power A of the laser. The data acquisition unit can acquire data of the laser's acquired output power B. The calibration unit is used to calibrate the acquired output power B of the laser acquired by the data acquisition unit and outputs the calibrated output power C of the laser after calibration. The comparison unit is used to compare the calibrated output power C of the laser with the upper and lower limits of the set output power A of the laser.

[0023] This invention uses a 1500W fiber laser as an example, with a rated power of 1500W. Light is emitted at 150W intervals from 150W to 1500W, and the laser's set output power A and the detected laser acquisition output power B are recorded (e.g.,...). Figure 2 As shown, the laser's set output power A is simply referred to as the set power, the laser's acquired output power B is simply referred to as the acquired output power, and the laser's calibrated output power C is the acquired output power after calibration (unit: W).

[0024] The above formula can be obtained using polynomials in mathematical methods. Figure 2 It can be seen that the deviation between the collected output power and the set power is between -2.0% and +8.0%, which cannot accurately determine whether the laser output power exceeds the upper or lower limit range.

[0025] Will Figure 2The ten data points, 147~1570, representing the "acquired output power" (i.e., laser acquired output power B), are substituted into the formula of this application to obtain the "acquired output power after calibration" data, 147.61~1491.9 (i.e., laser calibrated output power C). It can be seen that the deviation % between the calibrated laser output power C and the set power after calibration is between -1.6% and +1.25%, greatly improving the accuracy of the acquired output power.

[0026] The calibrated output power C of the laser is compared with the upper and lower limits of the set power range to determine whether it exceeds the upper and lower limits. If it does, the laser is stopped and an alarm is triggered; otherwise, the process is repeated. Figure 1 The process is compared. At this point, the function of accurately determining whether the laser output power exceeds the upper or lower limits and triggering an alarm is complete.

[0027] Existing settings often have large deviations in power settings. This application can reduce the upper and lower limit deviation range of laser output power settings by considering the calibrated laser output power C and the acceptable range of laser output power fluctuations for the product, thereby greatly improving the accuracy of laser output power judgment.

[0028] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A method for accurately determining when a laser's output power exceeds its upper or lower limits and triggering an alarm, characterized in that, Includes the following steps: Step S100: Obtain the upper and lower limits K of the laser output power; Step S200: Set the laser's set output power A, that is, the upper and lower limits of the laser's set output power A are A+K; Step S300: Collect the output power B of the laser. Step S400: The laser is calibrated, its output power B is acquired, and the laser calibration output power C is output. Step S500: Compare the laser calibration output power C with the upper and lower limits of the laser set output power A, that is, compare the value of C with the value of A+K. In step S600, when the laser calibration output power C exceeds the upper and lower limits of the laser set output power A, an alarm is triggered to stop laser output and an alarm signal is output. When the laser calibration output power C does not exceed the upper and lower limits of the laser set output power A, steps S100 to S600 are repeated.

2. The method for accurately determining and alarming when the laser output power exceeds the upper or lower limits according to claim 1, characterized in that, The laser calibration output power C is obtained from the laser acquisition output power B using a formula. The specific formula relating the laser calibration output power C to the laser acquisition output power B is as follows: y=3.325E-05x 2.000E+00 +8.876E-01x+1.641E+01 Where Y represents the laser calibration output power C, and X represents the laser acquisition output power B.

3. The method for accurately determining and alarming when the laser output power exceeds the upper or lower limits according to claim 2, characterized in that, The laser's output power A is set to have an upper and lower limit range K of ±2%.

4. The method for accurately determining and alarming when the laser output power exceeds the upper or lower limits according to claim 2, characterized in that, The deviation between the laser's set output power A and the laser's calibrated output power C is between -1.6% and 1.25%.

5. The method for accurately determining and alarming when the laser output power exceeds the upper or lower limits according to claim 2, characterized in that, The laser can be selected as a fiber laser, semiconductor laser, QCW laser, or MOPA laser.

6. The method for accurately determining and alarming when the laser output power exceeds the upper or lower limits according to claim 5, characterized in that, The laser is a fiber laser with a rated power of 1500W and emits light at 150W intervals.

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