CN113985756B - Method, device and storage medium for controlling pulse energy of continuous laser - Google Patents
Method, device and storage medium for controlling pulse energy of continuous laser Download PDFInfo
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- CN113985756B CN113985756B CN202111135184.9A CN202111135184A CN113985756B CN 113985756 B CN113985756 B CN 113985756B CN 202111135184 A CN202111135184 A CN 202111135184A CN 113985756 B CN113985756 B CN 113985756B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/70—Auxiliary operations or equipment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
- H01S5/068—Stabilisation of laser output parameters
- H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
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Abstract
The invention discloses a method and a device for controlling pulse energy of a continuous laser and a computer storage medium, belongs to the technical field of laser, and is designed for solving the technical problem of poor welding effect of the existing scheme. Establishing a corresponding relation between set power x and power control voltage V; acquiring actual output power data of the continuous laser, and acquiring actual output power data P based on the set power x and the actual output power data 1 Acquiring a correction formula 1; obtaining a correction formula 2 based on the corresponding relation and the correction formula 1, and obtaining a correction setting power control voltage V according to the correction formula 2 1 (ii) a Setting the correction to a power control voltage V 1 Output to an optical unit, by which the voltage V is controlled in dependence on the power 1 Converted to laser power output. The invention can improve the welding quality.
Description
Technical Field
The present invention relates to the field of laser technology, and in particular, to a method and apparatus for controlling continuous laser pulse energy, and a computer storage medium.
Background
The laser is used as an important industrial processing medium for welding new energy automobiles and 3C communication products, and the accuracy of laser energy is an important influence factor for reaching the product performance standard.
Under the social environment of the rapid development of current new energy vehicles and 3C communication products, the production efficiency of the products is continuously improved, however, a large number of enterprises still adopt continuous lasers with low energy precision in the production process of the products, the output stability of laser energy is poor, and secondary repair welding of a large number of products is caused.
Disclosure of Invention
The invention mainly aims to provide a method and a device for controlling pulse energy of a continuous laser and a computer storage medium, and aims to solve the technical problem that the existing continuous laser with low energy precision has poor welding effect.
To achieve the above object, the present invention provides a method for controlling continuous laser pulse energy, comprising:
step S10, establishing a corresponding relationship between the set power and a power control voltage V through a control voltage formula V = x 8/100, where x is the set power, V is a control voltage output by the microcontroller corresponding to the set power, when the set power x is 100W, the power control voltage V is 8V, and when the set power x is 50W, the power control voltage V is 4V;
step S201, taking L watts at intervals in the interval of N-M watts as set power x, then outputting laser, and measuring actual output power data P of the laser through an energy meter 1 Wherein M is more than N, and M is more than L and is more than or equal to N;
step S202, according to the x and the P 1 Obtaining a correction formula 1:
wherein, x is the set power,
the correction set power is obtained by calculating x through a correction formula 1;
step S30, obtaining a correction formula 2 based on the corresponding relation and the correction formula 1, and obtaining a correction setting power control voltage V according to the correction formula 2 1 ；
Step S40, setting the correction to the power control voltage V 1 Output to an optical unit, by which the voltage V is controlled in dependence on the power 1 Converting into laser power output, irradiating the laser to an energy meter through a transmission optical fiber, and acquiring a power value P in a complete laser waveform time t through the energy meter t Acquiring complete actual laser waveform energy;
step S50, comparing the actual laser waveform energy collected by the energy meter with the set laser waveform energy, and judging whether the first preset threshold is met;
and step S60, if yes, the continuous laser finishes pulse energy control, and if not, the step S10 is returned until the first preset threshold is met.
Optionally, in step S30, a correction formula 2 is obtained based on the correspondence and the correction formula 1, and a correction setting power control voltage is obtained according to the correction formula 2
The method comprises the following steps:
step S301, substituting the set power x into the correction formula 1 to obtain the corrected set power
Setting the correction to power
As the working power of the continuous laser, obtaining a correction setting power control voltage according to the correction formula 2
Wherein, the correction formula 2 is:
wherein, x is the set power,
in order to correct the set power, the power,
the power control voltage is set for correction.
Optionally, in step S50, comparing the actual laser waveform energy collected by the energy meter with the set laser waveform energy, and determining whether the first preset threshold is met includes:
step S501, by formula: (set energy-actually measured energy)/set energy, calculating a ratio, and judging whether the ratio is within 1.5%.
Optionally, step S40, setting the correction to the power control voltage
Output to an optical unit, through which the voltage is controlled in accordance with the correction setting power
Convert into laser power output, laser shines the energy gauge through transmission optical fiber, through power value p in energy gauge gathers a complete laser waveform time t, obtains complete actual laser waveform energy and includes:
step S401, the set power x is converted into the corrected set power according to the correction formula 1 by the microcontroller
Setting the correction to power
Converting into corresponding correction setting power control voltage according to correction formula 2
Output to an optical unit, through which the voltage is controlled in accordance with the correction setting power
And converting the laser power into laser power to be output, irradiating the laser to an energy meter through a transmission optical fiber, and acquiring a power value p of a complete laser waveform time t by the energy meter to obtain the actual laser waveform energy.
Optionally, the method for controlling pulse energy of a continuous laser includes a continuous laser, a microcontroller, and an optical unit, where the microcontroller converts a preset laser power waveform into a voltage waveform and outputs the voltage waveform to the optical unit;
and the optical unit is connected with a transmission optical fiber and is used for converting the voltage waveform into corresponding laser power so that target laser irradiates the energy meter through the transmission optical fiber.
Optionally, an energy meter is arranged at a laser output end of the transmission fiber, and the energy meter is used for measuring the waveform energy and power of the laser.
Optionally, the microcontroller includes a setting power unit, a corrected setting power unit, and a power-to-voltage converter, where the setting power unit is configured to correct the preset power through a correction formula 1, the corrected setting power unit is configured to correct the power corrected by the correction formula 1 again through a correction formula 2, and the power-to-voltage converter is configured to regulate and control the voltage to 0-8V.
A computer storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the above-described methods of controlling continuous laser pulse energy.
The invention has the beneficial effects that:
1. the invention accurately controls the pulse energy output of the continuous laser, realizes high reliability of product welding, further can improve the product welding goodness rate, and simultaneously reduces the bad cost of the product.
2. In order to accurately output the pulse energy of the continuous laser, the invention carries out power compensation with different amplitudes based on the linear relation between the set power and the actual output power of the continuous laser.
3. The invention is suitable for continuous lasers with various power levels.
Drawings
FIG. 1 is a schematic flow diagram of the present invention;
FIG. 2 is a schematic view of the apparatus of the present invention;
FIG. 3 is a schematic diagram of the calibration equation 1 of the present invention;
FIG. 4 is a schematic diagram of a first set of uncorrected measurement data according to the present invention;
FIG. 5 is a diagram illustrating a second set of uncorrected measurement data according to the present invention;
FIG. 6 is a graph illustrating a first set of corrected measurement data according to the present invention;
FIG. 7 is a diagram illustrating a second set of corrected measurement data according to the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. In the description of the present invention, it is to be understood that the terms "in", "on", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, unless otherwise expressly specified or limited, the term "coupled" is to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The invention is further illustrated with reference to the accompanying drawings:
referring to fig. 1-2, in one embodiment of the invention, a method of controlling continuous laser pulse energy includes:
step S10, establishing a corresponding relation between the set power x and the power control voltage V;
step S20, obtaining the actual output power data of the continuous laser, based on the set power x and the actual output power data P 1 Acquiring a correction formula 1;
step S30, obtaining a correction formula 2 based on the corresponding relation and the correction formula 1, and obtaining a correction setting power control voltage V according to the correction formula 2 1 ；
Step S40, setting the correction to the power control voltage V 1 Output to an optical unit, by which the voltage V is controlled in dependence on the power 1 Converting into laser power output, irradiating laser to energy meter via transmission optical fiber, and collecting a complete laser waveform via the energy meterPower value P in time t t Acquiring complete actual laser waveform energy;
step S50, comparing the actual laser waveform energy collected by the energy meter with the set laser waveform energy, and judging whether the first preset threshold is met;
step S60, if the first preset threshold is met, the continuous laser completes pulse energy control, and if the first preset threshold is not met, the step of establishing the correspondence between the set power x and the power control voltage V is returned until the first preset threshold is met.
In this embodiment, a corresponding relationship between the set power x and the power control voltage V may be pre-established by the setting power unit, and the power control voltage V may be regulated according to the corresponding relationship, so that the controllable range of the power control voltage V may be specified, for example, fixed between 0V and 8V; because the set power x is preset and the actual output power data of the continuous laser can be detected, a correction formula 1 can be obtained according to the variation relation between the set power x and the actual output power data; obtaining a correction formula 2 according to the corresponding relation and the correction formula 1, and obtaining a correction setting power control voltage V according to the correction formula 2 1 (ii) a Setting the correction to a power control voltage V 1 Output to an optical unit, by which the voltage V is controlled in dependence on the power 1 Converting into laser power output; the welding quality is influenced by a plurality of factors, the welding quality also comprises the material and the shape of an object to be welded and the influence of the external environment besides the laser pulse energy, on the basis, the material and the shape information of the object to be welded can be collected by the collecting unit, the corresponding relation between the information and the set power x is established, and in actual operation, the value of the set power x can be automatically selected based on the information collected by the collecting unit, so that the welding quality can be regulated to be suitable parameter values when different materials are welded, and the stable welding effect can be ensured. In addition, the continuum laser has a stable working state, and due to continuous working, heat generation is serious, and continuous cooling through a cooling device is needed, so that when the cooling device breaks down, the continuum laser is easy to break down, and therefore, the continuum laser can be used for achieving the purposeThe method comprises the steps that a pair of continuous lasers are arranged, the continuous lasers correspond to control units one to one, the pulse energy of the continuous lasers is regulated and controlled through the control units, and when cooling equipment at one continuous laser breaks down, the pulse energy of the other continuous laser is regulated and controlled through the control units.
Referring to FIGS. 4-7, the SWD1914 and SWD1916 waveform energies are controlled by this method with significantly reduced energy errors.
In one embodiment, the step S10, establishing the corresponding relationship between the set power x and the power control voltage V includes:
step S101, a corresponding relationship between the set power and a power control voltage V is established through a control voltage formula V = x × 8/100, where x is the set power, V is a control voltage output by the microcontroller corresponding to the set power, when the set power x is 100W, the power control voltage V is 8V, and when the set power x is 50W, the power control voltage V is 4V.
Optionally, in step S20, obtaining actual output power data P of the continuous laser 1 Acquiring a correction formula 1 based on the set power x and the actual output power data includes:
step S201, taking L watts at intervals in the interval of N-M watts as set power x, then outputting laser, and measuring actual output power data P of the laser through an energy meter 1 Wherein M is more than N, and M is more than L and is more than or equal to N;
step S202, according to the x and the P 1 Obtaining a correction formula 1:
wherein, x is the set power,
the corrected set power calculated by the correction formula 1 is x.
In this embodiment, referring to fig. 3, a set power is selected from 10 to 100W every 10W, the power interval value needs to be less than or equal to 10W, a large number of experiments prove that a larger power interval can affect energy precision, laser is output after the set power is set, actual output power is measured by an energy meter, and continuous laser set power-actual output power data is obtained and stored; a scatter diagram with a smooth line and data marks, in which the horizontal axis represents power (i.e., actual output power) data in the energy meter and the vertical axis represents the vertical axis, is inserted as shown in the solid line in fig. 3; the solid line can be described by a cubic equation (it is verified that the equation with the second and the following elements does not conform to the trend of the solid line, and the cubic equation can conform to the trend of the solid line but has the effect similar to that of the cubic equation) according to mathematical knowledge, and the dotted line can conform to the trend of the solid line as shown in fig. 3.
In one embodiment, step S30 is to obtain a correction formula 2 based on the corresponding relationship and the correction formula 1, and obtain a correction setting power control voltage according to the correction formula 2
The method comprises the following steps: step S301, substituting the set power x into the correction formula 1 to obtain the corrected set power
Setting the correction to power
As the working power of the continuous laser, obtaining a correction setting power control voltage according to the correction formula 2
Wherein, the correction formula 2 is:
wherein, x is the set power,
in order to correct the set power, the power,
the power control voltage is set for correction.
In one embodiment, the step S50 of comparing the actual laser waveform energy collected by the energy meter with the set laser waveform energy and determining whether the first preset threshold is met includes:
step S501, by formula: (set energy-actually measured energy)/set energy, calculating a ratio, and judging whether the ratio is within 1.5%.
In one embodiment, step S40 sets the correction to the power control voltage
Output to an optical unit, through which the voltage is controlled in accordance with the correction setting power
Convert into laser power output, laser shines the energy gauge through transmission optical fiber, through power value p in energy gauge gathers a complete laser waveform time t, obtains complete actual laser waveform energy and includes:
step S401, the set power x is converted into the corrected set power according to the correction formula 1 by the microcontroller
Setting the correction to power
Converting into corresponding correction setting power control voltage according to correction formula 2
Output to an optical unit, through which the voltage is controlled in accordance with the correction setting power
Conversion to laser power output, laserAnd irradiating the energy meter through a transmission optical fiber, and acquiring a power value p of a complete laser waveform time t by the energy meter to obtain the actual laser waveform energy.
In one embodiment, there is provided an apparatus for implementing any one of the above methods of controlling continuous laser pulse energy, comprising a continuous laser, a microcontroller and an optical unit, the microcontroller converting a predetermined laser power waveform into a voltage waveform and outputting the voltage waveform to the optical unit;
and the optical unit is connected with a transmission optical fiber and is used for converting the voltage waveform into corresponding laser power so that target laser irradiates the energy meter through the transmission optical fiber.
In one embodiment, the laser output end of the transmission fiber is provided with an energy meter, and the energy meter is used for measuring the energy and the power of the laser waveform.
In one embodiment, the microcontroller comprises a setting power unit, a corrected setting power unit and a power-voltage converter, wherein the setting power unit is used for correcting the preset power through a correction formula 1, the corrected setting power unit is used for correcting the power corrected through the correction formula 1 again through a correction formula 2, and the power-voltage converter is used for regulating and controlling the voltage to be between 0 and 8V.
In an embodiment, a computer storage medium is provided, having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the above-described methods of controlling the energy of successive laser pulses.
The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (4)
1. A method of controlling continuous laser pulse energy, comprising:
step S10, establishing a corresponding relationship between the set power and a power control voltage V through a control voltage formula V = x 8/100, where x is the set power, V is a control voltage output by the microcontroller corresponding to the set power, when the set power x is 100W, the power control voltage V is 8V, and when the set power x is 50W, the power control voltage V is 4V;
step S201, taking L watts at intervals in the interval of N-M watts as set power x, then outputting laser, and measuring actual output power data P of the laser through an energy meter 1 Wherein M is more than N, and M is more than L and is more than or equal to N;
step S202, according to the x and the P 1 Obtaining a correction formula 1:
wherein, x is the set power,
the correction set power is obtained by calculating x through a correction formula 1;
step S30, obtaining a correction formula 2 based on the corresponding relation and the correction formula 1, and obtaining a correction setting power control voltage V according to the correction formula 2 1 ；
Step S40, setting the correction to the power control voltage V 1 Output to an optical unit, by which the voltage V is controlled in dependence on the power 1 Converting into laser power output, irradiating the laser to an energy meter through a transmission optical fiber, and acquiring a power value P in a complete laser waveform time t through the energy meter t Acquiring complete actual laser waveform energy;
step S50, comparing the actual laser waveform energy collected by the energy meter with the set laser waveform energy, and judging whether the first preset threshold is met;
and step S60, if yes, the continuous laser finishes pulse energy control, and if not, the step S10 is returned until the first preset threshold is met.
2. The method of claim 1, wherein step S30 is implemented by obtaining a correction formula 2 based on the correspondence relationship and the correction formula 1, and obtaining a correction setting power control voltage according to the correction formula 2
The method comprises the following steps:
step S301, substituting the set power x into the correction formula 1 to obtain the corrected set power
Setting the correction to power
As the working power of the continuous laser, obtaining a correction setting power control voltage according to the correction formula 2
Wherein, the correction formula 2 is:
wherein, x is the set power,
in order to correct the set power, the power,
the power control voltage is set for correction.
3. The method of claim 2, wherein the step S50 of comparing the actual laser waveform energy collected by the energy meter with the set laser waveform energy to determine whether the first predetermined threshold is met comprises:
step S501, by formula: (set energy-actually measured energy)/set energy, calculating a ratio, and judging whether the ratio is within 1.5%.
4. The method of claim 3, wherein the step S40 is to set the correction to the power control voltage
Output to an optical unit, through which the voltage is controlled in accordance with the correction setting power
Convert into laser power output, laser shines the energy gauge through transmission optical fiber, through power value p in energy gauge gathers a complete laser waveform time t, obtains complete actual laser waveform energy and includes:
step S401, the set power x is converted into the corrected set power according to the correction formula 1 by the microcontroller
Setting the correction to power
Converting into corresponding correction setting power control voltage according to correction formula 2
Output to an optical unit, through which the voltage is controlled in accordance with the correction setting power
ConversionFor laser power output, laser irradiates an energy meter through a transmission optical fiber, and the energy meter acquires a power value p of a complete laser waveform time t to obtain actual laser waveform energy.
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| CN102170091A (en) * | 2011-03-31 | 2011-08-31 | 深圳市大族激光科技股份有限公司 | Laser power correcting method |
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