CN117175341A - Laser power compensation method - Google Patents
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Abstract
The invention relates to the technical field of lasers, in particular to a laser power compensation method, which comprises the following steps: s1: storing a data model of one-to-one correspondence of laser power and current on an input device; s2: the input device controls the target output power of the laser based on the data model; s3: acquiring the actual output power of the laser in real time through a measuring module; s4: comparing the target output power with the actual output power through a compensation module, and compensating the actual output power of the laser; the beneficial effects are that: the output power of the laser is dynamically adjusted in real time, so that the influence of a plurality of factors such as temperature, humidity, ageing of a laser light path and the like on the power of the laser can be avoided; a target calibration module is arranged to calibrate a current value corresponding to target output power, so that input errors are reduced; the power calibration submodule is arranged to calibrate the actual output power value corresponding to the output voltage value, so that the output error is reduced.
Description
Technical Field
The invention relates to the technical field of lasers, in particular to a laser power compensation method.
Background
The laser can be applied to various fields such as material processing, communication, sensing, research and development, military, medical treatment and the like, the fiber laser is a main flow technical route of the current laser, accounts for nearly 50% of the global laser scale, and has the characteristics of good beam quality, high efficiency, good heat dissipation characteristic, compact structure and the like, and has wide application prospect.
The output power of the laser is easily affected by various factors, such as external temperature, use duration, energy loss, ageing in components and the like, which can cause the difference between the actual output power of the laser and the set target output power to affect the normal use of the laser, and cannot meet the use situations with high requirements on laser precision, so that a method is needed to improve the output precision of the laser so as to meet more use situations.
Disclosure of Invention
In order to overcome the technical defect of inaccurate actual output power in the prior art, the invention provides a laser power compensation method,
the technical scheme adopted by the invention is as follows: a method of laser power compensation comprising the steps of:
s1: storing a data model, a current calibration linearization model and a power calibration linearization model of the laser, wherein the data model, the current calibration linearization model and the power calibration linearization model are in one-to-one correspondence with each other;
s2: controlling a target output power of the laser based on the data model and a current calibration linearization model;
s3: acquiring the actual output power of the laser in real time through a measuring module;
s4: and comparing the target output power with the actual output power through a compensation module, and compensating the actual output power of the laser.
Further, the method for establishing the data model in the step S1 includes the following steps:
s101: controlling the current input to the laser through the PC, and recording a plurality of groups of current data;
s102: acquiring output power data of the lasers in one-to-one correspondence with the current data by using a power meter;
s103: and drawing a data model of power and current based on the data acquired in the S101 and the S102.
Further, the specific implementation steps of the step S2 are as follows:
s201: judging a power interval where the target output power is based on the data model;
s202: inputting the data acquired in the step S201 into a current calibration linearization model to obtain a calibration current corresponding to the target output power;
s203: and (3) inputting the calibration current in the step S202 into a laser to realize the control of the target output power of the laser.
Further, the current calibration linearization model satisfies the following formula:
；
wherein,in order to calibrate the value of the current,in order to measure the resulting actual power value,as an upper limit of the power interval,as a lower limit of the power interval,is thatThe corresponding current value is used for generating a current value,is thatThe corresponding current value.
Further, the measuring module comprises a measuring sub-module and a power calibration sub-module, and the working process of the measuring module is as follows:
s301: the measuring submodule acquires the output voltage of the laser;
s302: inputting the output voltage into a power calibration sub-module;
s303: the power calibration submodule obtains actual output power based on power calibration linearization model operation.
Further, a filtering sub-module is arranged between the measuring module and the power calibration sub-module.
Further, the power calibration linearization model satisfies the following formula:
；
wherein,in order to calculate the actual output power that is obtained,for measuring the actual voltage value measured by the submodule,is the upper limit of the voltage interval,is the lower limit of the voltage interval,is thatThe corresponding power value is used to determine,is thatCorresponding power values.
Further, the compensation module is connected with a current control module, the current control module is connected with a laser light path, and the current control module receives a compensation signal of the compensation module and adjusts the input current of the laser light path based on the compensation signal.
In summary, the beneficial effects of the invention are as follows: 1. the output power of the laser is dynamically adjusted in real time, so that the influence of a plurality of factors such as temperature, humidity, ageing of a laser light path and the like on the power of the laser can be avoided, and the output power of the laser is more stable; 2. a target calibration module is arranged to calibrate a current value corresponding to target output power, so that the error of input current is reduced; 3. the power calibration sub-module is arranged to calibrate the actual output power value corresponding to the output voltage value, so that the measurement error of the measurement module is reduced; 4. the filter sub-module is arranged, so that interference is prevented, and the stability is high.
Drawings
Fig. 1 is a flow chart of a laser power compensation method according to the present invention.
Fig. 2 is a flow chart of a method for creating a data model of a laser power compensation method according to the present invention.
Fig. 3 is a flow chart of target power control of a laser power compensation method of the present invention.
Fig. 4 is a flow chart of actual power calibration of a laser power compensation method according to the present invention.
Fig. 5 is a graph of power versus current data for a laser power compensation method according to the present invention.
Fig. 6 is a block diagram of a laser power compensation method according to the present invention.
Reference numerals illustrate:
11. a storage module; 12. a target calibration module; 2. a measurement module; 21. a measurement sub-module; 22. a power calibration sub-module; 23. a filtering sub-module; 3. a compensation module; 4. a current control module; 5. and a laser light path.
Description of the embodiments
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
The invention is further described below with reference to the accompanying drawings:
as shown in fig. 1-6, the present embodiment provides a laser power compensation method, which includes the following steps:
s1: storing a data model, a current calibration linearization model and a power calibration linearization model of the laser, wherein the data model, the current calibration linearization model and the power calibration linearization model are in one-to-one correspondence with each other;
s2: controlling a target output power of the laser based on the data model and a current calibration linearization model;
s3: acquiring the actual output power of the laser in real time through a measuring module 2;
s4: the target output power and the actual output power are compared by a compensation module 3 and the actual output power of the laser is compensated.
In this embodiment, in step S3, the measuring module 2 measures the output power of the laser light path 5, and the compensating module 3 compares and compensates the output power of the laser light path 5; the power value compensated by the compensation module 3 is input into the laser light path 5 again, and the power value is circularly reciprocated, so that the real-time dynamic adjustment of the output power of the laser light path 5 is realized, and the influence of a plurality of factors such as temperature, humidity, ageing of the laser light path 5 and the like on the laser power can be avoided.
In this embodiment, the laser is connected to an output device, the input device is an upper computer, a data model of power and current, a current calibration linearization model and a power calibration linearization model are all stored in a storage module 11 inside the laser, a target output power of the laser is set through the input device, and a target calibration module 12 is set to calibrate the current input to the optical path 5 of the laser, so that control of the target output power of the laser is achieved.
Fig. 5 of the present embodiment is a line diagram of a power and current data model, wherein the abscissa is power and the ordinate is current, and the method for establishing the data model in step S1 includes the following steps:
s101: controlling the current input to the laser through the PC, and recording a plurality of groups of current data;
s102: acquiring output power data of the lasers in one-to-one correspondence with the current data by using a power meter;
s103: and drawing a data model of power and current based on the data acquired in the S101 and the S102.
In this embodiment, the specific implementation steps of the step S2 are as follows:
s201: and judging a power interval where the target output power is based on the data model, namely: judging the minimum power interval of the target output power in the data model;
s202: inputting the data acquired in the step S201 into a current calibration linearization model to obtain a calibration current corresponding to the target output power;
s203: and (2) inputting the calibration current in the step S202 into a laser, and controlling the target output power of the laser through calibrating and controlling the current input into the laser.
The method comprises the steps of inputting a plurality of groups of current data, measuring power data corresponding to the current data to obtain a plurality of groups of scattered point values in a power and current coordinate system, wherein the more the plurality of groups of the scattered point values are measured, the more the scattered point values are dense, the more accurate the data model is, the adjacent scattered point values in the data model have a linear relation by default, the current value corresponding to any power in the data model is obtained through current calibration linearization model operation, the power finally output by a laser is enabled to be closer to target output power through calibration of input current, and errors caused by the input current are reduced.
In this embodiment, the target calibration module 12 is configured to perform an operation of a current calibration linearization model, where the current calibration linearization model satisfies the following formula:
；
wherein,in order to calibrate the value of the current,in order to measure the resulting actual power value,as an upper limit of the power interval,as a lower limit of the power interval,is thatThe corresponding current value is used for generating a current value,is thatThe corresponding current value.
In this embodiment, the measurement module 2 includes a measurement sub-module 21 and a power calibration sub-module 22, and the working process of the measurement module 2 is as follows:
s301: the measuring submodule 21 acquires the output voltage of the laser;
s302: inputting the output voltage into a power calibration sub-module 22;
s303: the power calibration sub-module 22 computes the actual output power based on a power calibration linearization model.
In this embodiment, the power calibration sub-module 22 is configured to perform an operation of a power calibration linearization model, where the power calibration linearization model satisfies the following formula:
；
wherein,in order to calculate the actual output power that is obtained,for measuring the actual voltage value measured by the submodule,is the upper limit of the voltage interval,is the lower limit of the voltage interval,is thatThe corresponding power value is used to determine,is thatCorresponding power values.
In this embodiment, the measurement module 2 further includes a filtering sub-module 23, the filtering sub-module 23 is disposed between the power calibration sub-module 22 and the comparison module, and the working process of the filtering sub-module 23 is as follows: obtaining output data of the power calibration sub-module 22 for a plurality of times, taking an average value, and taking the average value as the final actual output power of the laser light path 5; in this embodiment, the filtering sub-module 23 receives the signal transmitted by the power calibration sub-module 22 every 2ws, averages the signal for 100 times, and uses the average value as the actual output power of the laser light path 5.
In this embodiment, the compensation module 3 is connected to a current control module 4, the current control module 4 is connected to a laser light path 5, and the current control module 4 receives a compensation signal of the compensation module 3 and adjusts an input current of the laser light path 5 based on the compensation signal; specifically, when the target output power is smaller than the actual output power, the input current is increased, and when the target output power is larger than the actual output power, the input current is decreased.
In this embodiment, the measurement module 2 includes a filtering sub-module 23, a measurement module 2 and a power calibration sub-module 22, where the filtering sub-module 23 is disposed between the measurement module 2 and the power calibration sub-module 22, and the working process of the filtering sub-module 23 is as follows: the output data of the measuring sub-module 21 are obtained for a plurality of times, an average value is obtained, and the average value is transmitted to the power calibration sub-module 22, and the power calibration sub-module 22 calculates the actual output power of the output laser.
Working principle: the invention judges whether the output power of the laser light path 5 is accurate by comparing the target output power and the actual output power of the laser, when the output power of the laser light path 5 is inaccurate, the compensation module 3 compensates, and inputs the compensated power value into the laser light path 5 again, and the invention circularly reciprocates, thereby realizing the real-time dynamic adjustment of the output power of the laser and simultaneously avoiding the influence of a plurality of factors such as temperature, humidity, laser aging and the like on the power of the laser. Meanwhile, a target calibration module 12 is arranged to calibrate the current value of the input laser light path 5, so that the control of the target output power of the laser is realized; the power calibration sub-module 22 is set to calibrate the actual output power value corresponding to the output voltage value, so that the error of the output power measured by the measuring module 2 is reduced; the filter sub-module 23 is arranged to prevent interference, and has the advantages of real-time dynamic adjustment, strong stability and no influence of external factors.
While the foregoing embodiments have shown and described the fundamental principles and main features of the invention as well as the advantages thereof, it will be understood by those skilled in the art that the present invention is not limited by the foregoing embodiments, but rather by the description of the embodiments and descriptions, various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents.
Claims (8)
1. A method of compensating for laser power, comprising the steps of:
s1: storing a data model, a current calibration linearization model and a power calibration linearization model of the laser, wherein the data model, the current calibration linearization model and the power calibration linearization model are in one-to-one correspondence with each other;
s2: controlling a target output power of the laser based on the data model and a current calibration linearization model;
s3: acquiring the actual output power of the laser in real time through a measuring module;
s4: and comparing the target output power with the actual output power through a compensation module, and compensating the actual output power of the laser.
2. The method for compensating power of laser according to claim 1, wherein the method for creating the data model in step S1 comprises the steps of:
s101: controlling the current input to the laser through the PC, and recording a plurality of groups of current data;
s102: acquiring output power data of the lasers in one-to-one correspondence with the current data by using a power meter;
s103: and drawing a data model of power and current based on the data acquired in the S101 and the S102.
3. The method for compensating power of a laser according to claim 1, wherein the specific implementation step of step S2 is as follows:
s201: judging a power interval where the target output power is based on the data model;
s202: inputting the data acquired in the step S201 into a current calibration linearization model to obtain a calibration current corresponding to the target output power;
s203: and (3) inputting the calibration current in the step S202 into a laser to realize the control of the target output power of the laser.
4. A method of compensating laser power according to claim 1, wherein the current calibration linearization model satisfies the following equation:
；
wherein,in order to calibrate the value of the current,in order to measure the resulting actual power value,as an upper limit of the power interval,as a lower limit of the power interval,is thatThe corresponding current value is used for generating a current value,is thatThe corresponding current value.
5. The laser power compensation method according to claim 1, wherein the measuring module comprises a measuring sub-module and a power calibration sub-module, and the working process of the measuring module is as follows:
s301: the measuring submodule acquires the output voltage of the laser;
s302: inputting the output voltage into a power calibration sub-module;
s303: the power calibration submodule obtains actual output power based on power calibration linearization model operation.
6. The method of claim 5, wherein a filtering sub-module is disposed between the measurement module and the power calibration sub-module.
7. A method of compensating laser power according to claim 1, wherein the power calibration linearization model satisfies the following equation:
；
wherein,for the calculated actualThe output power is set to be equal to the output power,for measuring the actual voltage value measured by the submodule,is the upper limit of the voltage interval,is the lower limit of the voltage interval,is thatThe corresponding power value is used to determine,is thatCorresponding power values.
8. The method of claim 1, wherein the compensation module is connected to a current control module, the current control module is connected to a laser path, and the current control module receives a compensation signal from the compensation module and adjusts an input current to the laser path based on the compensation signal.
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| CN117358552A (en) * | 2023-12-08 | 2024-01-09 | 常州铭赛机器人科技股份有限公司 | Automatic spot inspection compensation method for energy of UV lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117358552A (en) * | 2023-12-08 | 2024-01-09 | 常州铭赛机器人科技股份有限公司 | Automatic spot inspection compensation method for energy of UV lamp |
| CN117358552B (en) * | 2023-12-08 | 2024-02-23 | 常州铭赛机器人科技股份有限公司 | Automatic spot inspection compensation method for energy of UV lamp |
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