WO2019206339A1

WO2019206339A1 - Laser operating method, quasi continuous wave laser, and laser cutting and welding system

Info

Publication number: WO2019206339A1
Application number: PCT/CN2019/084866
Authority: WO
Inventors: 何高锋; 蒋峰
Original assignee: 深圳市创鑫激光股份有限公司
Priority date: 2018-04-28
Filing date: 2019-04-28
Publication date: 2019-10-31
Also published as: CN108620727A; CN108620727B

Abstract

A laser operating method, comprising: receiving a pre-set first waveform data package, wherein the pre-set first waveform data package comprises first waveform data composed of digital signals; verifying the received first waveform data package, and determining whether the first waveform data in the first waveform data package meets a pre-set criterion; and if the first waveform data in the first waveform data package meets the pre-set criterion, storing the first waveform data, and outputting a laser pulse according to the first waveform data. The method reduces errors in a data transmission process, and facilitates the improvement of the accuracy of a laser pulse output finally. In addition, an application scenario of the laser is simplified, and the intelligent performance of laser application is improved. The present invention also relates to a quasi continuous wave laser and a laser cutting and welding system.

Description

Laser working methods, quasi-continuous lasers, laser cutting and welding systems

[Technical Field]

The present application relates to the field of laser technologies, and in particular, to a laser working method, a quasi-continuous laser, a laser cutting and soldering system.

【Background technique】

Quasi continuous wave (QCW) lasers, also known as long-pulsed fiber lasers, are one of the fiber lasers that generate pulses of the order of ms with a duty cycle of 50% or less and an average power of the maximum peak. With less than 10% power and excellent pulse power and energy stability, it has a wide range of applications in laser welding, laser cutting and other fields.

In laser welding, it is common to use a laser and a board. The board is used to control the positional movement of the laser and provide an analog quantity to the laser so that the laser outputs the same shape of the laser pulse according to the analog quantity.

In the process of implementing the present application, the inventors have found that the related art has the following problems: when the laser pulse is output according to the analog quantity, the error is caused by the attenuation of the analog quantity in the transmission process, so that the final output laser pulse does not meet the requirements of the user. .

[Summary of the Invention]

The technical problem to be solved by the present application is to provide a laser working method, a quasi-continuous laser, a laser cutting and welding system, and solve the problem that the prior art has a transmission error when outputting a laser pulse.

An aspect of an embodiment of the present application provides a method for operating a laser, the method comprising:

Receiving a preset first waveform data packet, where the preset first waveform data packet includes first waveform data composed of digital signals;

Performing verification on the received first waveform data packet, and determining whether the first waveform data in the first waveform data packet meets a preset standard;

And if the first waveform data in the first waveform data packet conforms to a preset standard, saving the first waveform data, and outputting a laser pulse according to the first waveform data.

Optionally, the verifying the received first waveform data packet, determining whether the first waveform data in the first waveform data packet meets a preset standard, includes:

Parsing the first waveform data packet to obtain first waveform data;

Checking whether the first waveform data is lost by a checksum;

Determining whether the preset parameter of the first waveform data meets a preset laser standard if the first waveform data is not lost, and when the preset parameter of the first waveform data meets a preset laser standard, The first waveform data in the first waveform data packet conforms to a preset criterion, and when the preset parameter of the first waveform data does not meet the preset laser standard, the first waveform data in the first waveform data packet is not Meet the preset standards.

Optionally, the preset parameters of the first waveform data include at least one of a laser pulse energy, a laser waveform duty ratio, and a laser waveform frequency.

Optionally, the method further includes:

Receiving a waveform switching instruction;

Obtaining waveform information of the waveform to be switched according to the received waveform switching instruction, and converting the waveform information into a laser control instruction;

Transmitting the laser control command to the FPGA to cause the FPGA to control switching of the waveform according to the laser control command.

Optionally, the method further includes:

If the first waveform data in the first waveform data packet does not meet a preset criterion, sending the first waveform data does not meet the preset standard instruction feedback;

Receiving a preset second waveform data packet returned according to the instruction, wherein the preset second waveform data packet comprises second waveform data composed of digital signals.

Another aspect of an embodiment of the present application provides a quasi-continuous laser, the quasi-continuous laser comprising: a controller and an FPGA,

The controller is configured to receive a preset first waveform data packet, check the received first waveform data packet, and determine whether the first waveform data in the first waveform data packet meets a preset a standard, if the first waveform data in the first waveform data packet meets a preset standard, saving the first waveform data, wherein the preset first waveform data packet comprises a digital signal a waveform data;

The FPGA is configured to acquire the first waveform data from the controller, and output a laser pulse according to the first waveform data.

Optionally, the controller is further configured to receive a waveform switching instruction, acquire waveform information of the waveform to be switched according to the received waveform switching instruction, convert the waveform information into a laser control instruction, and send the Deriving a laser control command to the FPGA;

The FPGA is further configured to control switching of a waveform according to the laser control instruction.

Optionally, the quasi-continuous laser further includes: a photosensor and a DAC chip, wherein the photosensor and the DAC chip are respectively connected to the FPGA,

The photoelectric sensor is configured to collect an optical pulse signal in real time, convert the optical pulse signal into an electrical pulse signal, and send the electrical pulse signal to the FPGA, so that the FPGA according to the received electrical pulse The signal determines whether the optical path is normal;

The DAC chip is configured to receive a digital signal transmitted by the FPGA and convert the digital signal into an analog quantity for controlling an operating current of the quasi-continuous laser.

Optionally, the quasi-continuous laser further includes: an optical power tester connected to the controller,

The optical power tester is configured to receive a preset operating current, and determine whether the working current meets a preset rated current, and if yes, send a rated current configuration completion instruction to the controller;

The controller controls the FPGA to output a laser pulse according to the first waveform data according to the rated current configuration completion instruction.

In still another aspect of the embodiments of the present application, a laser cutting and welding system is provided, comprising: a quasi-continuous laser as described above, and a host computer,

The upper computer is configured to generate a preset first waveform data packet, and send the preset first waveform data packet to the quasi-continuous laser, wherein the preset first waveform data packet includes a number The first waveform data composed of signals.

Optionally, the system further includes a galvanometer, the quasi-continuous laser is provided with a control interface, the upper computer is provided with a card, and the card is connected to the quasi-continuous laser through the control interface. The board is configured to control movement of the galvanometer according to the first waveform data.

Optionally, the system further includes a transmission mechanism, the quasi-continuous laser includes a laser output head, the transmission mechanism is fixed to the laser output head and drives the movement thereof, and the quasi-continuous laser is provided with a control interface. A card is disposed on the upper computer, and the card is connected to the transmission mechanism through the control interface, and the card is configured to control the transmission mechanism to drive the laser output head to move according to the first waveform data.

The beneficial effect of the embodiment of the present application is that, by receiving a preset first waveform data packet, the first waveform data packet is verified to determine whether it meets a preset standard, and if it is met, the first waveform data packet is saved. First waveform data, and outputting a laser pulse according to the first waveform data, wherein the first waveform data packet comprises first waveform data composed of digital signals. Since the laser directly receives digital waveform data, thereby reducing errors in the data transmission process, it is advantageous to improve the accuracy of the final output laser pulse; in addition, the embodiment simplifies the application scenario of the laser and improves the application intelligence of the laser. Sex.

[Description of the Drawings]

The one or more embodiments are exemplified by the accompanying drawings in the accompanying drawings, and FIG. The figures in the drawings do not constitute a scale limitation unless otherwise stated.

1 is a schematic flow chart of a working method of a laser provided by an embodiment of the present application;

2 is a schematic flow chart of a method for determining whether a first waveform data in a first waveform data packet conforms to a preset laser standard in a working method of a laser provided by an embodiment of the present application;

3 is a schematic flow chart of a working method of a laser according to another embodiment of the present application;

4 is a schematic flow chart of a working method of a laser according to another embodiment of the present application;

FIG. 5 is a schematic structural diagram of a working device of a laser according to an embodiment of the present application; FIG.

6 is a schematic diagram showing the hardware structure of a laser 30 for performing a laser operation method according to an embodiment of the present application;

FIG. 7 is a schematic structural view of a laser cutting and welding system according to an embodiment of the present application.

【detailed description】

In order to make the objects, technical solutions, and advantages of the present application more comprehensible, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the application and are not intended to be limiting.

It should be noted that, if there is no conflict, the various features in the embodiments of the present application may be combined with each other, and are all within the protection scope of the present application. In addition, although the division of the functional modules is performed in the device schematic, the logical sequence is shown in the flowchart, but in some cases, it may be performed in a different manner from the modules in the device schematic, or in the order in the flowchart. The steps shown or described.

Please refer to FIG. 1. FIG. 1 is a schematic flow chart of a working method of a laser provided by an embodiment of the present application. As shown in Figure 1, the method includes:

Step 101: Receive a preset first waveform data packet, where the preset first waveform data packet includes first waveform data composed of digital signals.

The method provided by the embodiment of the present application is performed by a laser, and may be specifically performed by a QCW laser. The preset first waveform data packet may be sent by the host computer to the QCW laser, and the host computer may be a smart terminal device such as a computer, a tablet computer, a smart phone, or the like that can load and display a webpage application.

The preset first waveform data packet includes first waveform data composed of digital signals, and the first waveform data composed of the digital signals can be obtained by prior waveform editing and encoding. For example, in the host computer, the waveform of the analog signal is edited by the waveform editing software of the QCW laser to convert the waveform of the analog signal into the waveform data of the digital signal. Here, the editing of the waveform is to edit the waveform to be used into a data packet of a certain format, which may be to edit a plurality of groups of waveforms into one data packet, or to edit each group of waveforms into one data packet, which is based on actual Determined by use. It should be noted that in addition to editing the preset waveform by the waveform editing software of the QCW laser, the waveform can be edited by other software as long as the software conforms to the preset protocol. After the waveform editing is completed, the data packet can be sent to the laser through the serial port by the host computer. Thereby, the laser is obtained by means of digital transmission, thereby reducing transmission errors.

In other embodiments, after the completion of the editing and encoding of the completed waveform, after generating the data packet, the data packet may be compressed, and then sent to the laser after being compressed. After the laser obtains the compressed waveform data packet, the data packet may be decompressed first. Waveform data packets, and then the following processing. By compressing and then transmitting, the data transmission efficiency can be improved. In addition, in addition to compressing the data packet, the data packet of the important waveform data can be encrypted. After the laser obtains the compressed and encrypted waveform data packet, the waveform data packet can be decompressed and decrypted, and then the following processing is performed. .

Step 102: Perform verification on the received first waveform data packet, and determine whether the first waveform data in the first waveform data packet meets a preset standard.

After the laser receives the waveform data, the laser will parse the waveform data in the first waveform packet, and after the analysis is completed, the data is verified. Specifically, as shown in FIG. 2, the verifying the received first waveform data packet, determining whether the first waveform data in the first waveform data packet meets a preset standard, includes:

Step 1021: Parsing the first waveform data packet to obtain first waveform data.

Step 1022: Check whether there is a loss in the first waveform data by using a checksum; this step is a pure data check, and check whether there is a loss in the data transmission process, where the checksum is used to check, of course, In practice, it can also be tested in other ways.

Step 1023: If there is no loss in the first waveform data, determine whether the preset parameter of the first waveform data meets a preset laser standard, when the preset parameter of the first waveform data meets a preset laser standard. The first waveform data in the first waveform data packet conforms to a preset criterion, and when the preset parameter of the first waveform data does not meet a preset laser standard, the first one of the first waveform data packets Waveform data does not meet the preset criteria.

When determining that there is no loss of the first waveform data, further checking the format of the waveform, determining whether the preset parameter of the first waveform data conforms to the preset laser standard, that is, determining the laser pulse energy of the first waveform data, Whether the laser waveform duty cycle, laser waveform frequency, etc., meets the preset laser standard. The preset laser standard is related to the laser currently used, and the laser standard can be predefined. If the first waveform data does not have a loss, and the preset parameter of the first waveform data meets a preset laser standard, indicating that the first waveform data in the first waveform data packet meets a preset standard, otherwise ,incompatible. The preset parameters of the first waveform data include at least one of a laser pulse energy, a laser waveform duty ratio, and a laser waveform frequency.

It should be noted that, when determining whether the first waveform data in the first waveform data packet meets a preset standard, the waveform format of the first waveform data may be first checked, and then whether there is data loss.

In the embodiment, by verifying the acquired waveform data, the accuracy of the received waveform data can be further ensured, which is advantageous for improving the accuracy of the pulse signal outputted in the subsequent process.

Step 103: If the first waveform data in the first waveform data packet meets a preset standard, save the first waveform data, and output a laser pulse according to the first waveform data.

When the received first waveform data conforms to a preset standard, the first waveform data may be saved in a controller of the laser to output a laser pulse according to the first waveform data, thereby performing welding and cutting And other related operations.

In some other embodiments, after saving the first waveform data, the laser returns a waveform stored instruction to the host computer, thereby ending the waveform transmission process and also the interaction process between the laser and the host computer. Better.

In some other embodiments, the outputting the laser pulse according to the first waveform data comprises: receiving a preset operating current; determining whether the operating current meets a preset rated current, and if so, controlling the first waveform The data outputs a laser pulse. In this embodiment, before the first waveform data is acquired and the output laser pulse is output, the rated current of the laser may be configured to stably output the laser pulse. Wherein, the working current can be written into the laser by the host computer software at the factory, and then the upper computer sends an opening command to the laser. At this time, the laser controls the laser diode according to the working current written by the upper computer software, and the light is turned on. At that time, the optical power tester can be used to measure the power of the laser output light, and the measurement result is compared with a preset power value. If the detection result is equal to the preset power value, it indicates that the working current satisfies the preset rated current. If the detection result is less than or greater than the preset power value, it means that the operating current needs to be adjusted according to the percentage of the difference. The above determines the rated current of the laser during operation by comparing the power value of the output light. Of course, in practical applications, the rated current when the laser is working can be determined by other means. After the rated current configuration of the laser is completed, the laser pulse is output according to the first waveform data, so that the cutting, welding, and the like can be performed stably.

The embodiment of the present application provides a working method of a laser, which receives a preset first waveform data packet, and verifies the first waveform data packet to determine whether it meets a preset standard, and if yes, saves First waveform data in the first waveform data packet, and outputting a laser pulse according to the first waveform data, wherein the first waveform data packet includes first waveform data composed of digital signals. Since the laser directly receives digital waveform data, thereby reducing errors in the data transmission process, it is advantageous to improve the accuracy of the final output laser pulse; in addition, the embodiment simplifies the application scenario of the laser and improves the application intelligence of the laser. Sex.

Please refer to FIG. 3. FIG. 3 is a schematic flowchart diagram of a working method of a laser according to another embodiment of the present application. The main difference between FIG. 3 and FIG. 1 above is that the method further includes:

Step 104: Receive a waveform switching instruction, where the waveform switching instruction includes a number corresponding to the waveform to be switched;

Step 105: Acquire waveform information of the waveform to be switched according to the received waveform switching instruction, and convert the waveform information into a laser control instruction;

Step 106: Send the laser control instruction to the FPGA, so that the FPGA controls the switching of the waveform according to the laser control instruction.

It can be understood that when a QCW laser is used, a set of waveform data is executed, and a certain shape of the laser pulse is output. In the laser welding, each solder joint requires a specific laser pulse shape, so when spot welding is required, Dynamically switch the laser pulse waveform according to the solder joint. In the present embodiment, laser pulses are output based on the received first waveform data composed of digital signals, and waveform switching is performed.

Wherein, the waveform switching instruction is sent to the laser by the upper computer operating software, and since the first waveform data in the received first waveform data packet is edited and encoded in advance, the number of the waveform to be switched can be loaded in the In the waveform switching instruction. After receiving the waveform switching instruction, the laser parses the waveform switching instruction, acquires waveform information of the waveform to be switched, and converts the waveform information into a laser control instruction by an MCU controller of the laser, where the laser control instruction is on-site A form of data that can be identified by a Field Programmable Gate Array (FPGA), including laser switching and laser power control. The laser sends the laser control command to the FPGA, and the FPGA controls the laser according to the instruction to control the switching of the waveform. The FPGA can also be replaced by other devices, such as a Complex Programmable Logic Device (CPLD).

Each time a waveform needs to be switched, a waveform switching instruction is sent to the MCU of the laser. When the laser receives the waveform switching instruction, a corresponding laser control instruction is generated, and a laser control instruction is sent to the FPGA, and the FPGA according to the laser The control command controls the switching of the laser pump, the magnitude of the current, and the like, thereby controlling the switching of the waveform.

The embodiment of the present application provides a method for controlling a laser, which adds a waveform switching process based on the foregoing embodiment, which not only improves the accuracy of the output laser pulse, but also simplifies the application scenario of the laser. When the waveform is switched, the accuracy of the waveform of the switched laser beam is improved, and the accuracy of the switched waveform is improved, and the performance of the laser is improved as a whole.

Please refer to FIG. 4. FIG. 4 is a schematic flowchart diagram of a working method of a laser according to another embodiment of the present application. The main difference between FIG. 4 and FIG. 3 above is that the method further includes:

Step 107: If the first waveform data in the first waveform data packet does not meet the preset standard, send the instruction feedback that the first waveform data does not meet the preset standard;

Step 108: Receive a preset second waveform data packet returned according to the instruction, where the preset second waveform data packet includes second waveform data composed of digital signals.

In this embodiment, when the received first waveform data does not meet the preset standard, the laser sends a command feedback that does not meet the preset standard to the operating device, thereby informing the operating software to resend the waveform, that is, sending The preset second waveform data packet. The preset second waveform data packet is of the same type as the preset first waveform data packet, and is also composed of second waveform data composed of digital signals, but wherein the waveform data is different, in this embodiment, the pre-editing and Encode waveform packets containing different waveform data.

Further, after the laser receives the preset second waveform data packet, the steps of the foregoing embodiment may be repeated, the second waveform data in the second waveform data packet is verified, and according to the second The waveform data outputs laser pulses, and performs operations such as switching of control laser pulses.

Based on the above embodiments, the working method of the laser provided by the present embodiment not only improves the accuracy of the output laser pulse, but also simplifies the application scenario of the laser, and ensures that the currently received waveform data conforms to a preset standard, thereby further ensuring The accuracy of the output laser pulse.

Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of a laser working device according to an embodiment of the present application. As shown in FIG. 5, the device 20 includes a first receiving module 21, a verification module 22, and a first processing module 23.

The first receiving module 21 is configured to receive a preset first waveform data packet, where the preset first waveform data packet includes first waveform data composed of digital signals. The verification module 22 is configured to check the received first waveform data packet, and determine whether the first waveform data in the first waveform data packet meets a preset standard. The first processing module 23 is configured to save the first waveform data if the first waveform data in the first waveform data packet meets a preset standard, and output a laser pulse according to the first waveform data.

In the embodiment, the verification module 22 includes an analysis unit 221, a first verification unit 222, and a second verification unit 223. The parsing unit 221 is configured to parse the first waveform data packet to obtain first waveform data, and the first checking unit 222 is configured to check whether the first waveform data is lost by using a checksum; 223, if the first waveform data does not have a loss, determine whether the preset parameter of the first waveform data meets a preset laser standard, and when the preset parameter of the first waveform data meets a preset laser Standard, the first waveform data in the first waveform data packet conforms to a preset standard, and when the preset parameter of the first waveform data does not meet a preset laser standard, the first waveform data packet A waveform data does not meet the preset criteria.

The preset parameters of the first waveform data include at least one of a laser pulse energy, a laser waveform duty ratio, and a laser waveform frequency.

The first processing module 23 is specifically configured to: if the first waveform data in the first waveform data packet meets a preset standard, save the first waveform data, and receive a preset working current, Determining whether the working current satisfies a preset rated current, and if so, controlling the first waveform data to output a laser pulse.

In other embodiments, referring also to FIG. 5, the apparatus 20 further includes: a second receiving module 24, a second processing module 25, and a sending module 26. The second receiving module 24 is configured to receive a waveform switching instruction, and the second processing module 25 is configured to acquire waveform information of the waveform to be switched according to the received waveform switching instruction, and convert the waveform information into a laser control instruction; a sending module 26, configured to send the laser control instruction to the FPGA, so that the FPGA controls switching of the waveform according to the laser control instruction.

In other embodiments, referring also to FIG. 5, the apparatus 20 further includes: a third processing module 27 and a third receiving module 28. The third processing module 27 is configured to: if the first waveform data in the first waveform data packet does not meet a preset criterion, send an instruction that the first waveform data does not meet a preset standard; and the third receiving module 28: For receiving a preset second waveform data packet returned according to the instruction, where the preset second waveform data packet includes second waveform data composed of digital signals.

It should be noted that, in the working device of the laser in the embodiment of the present application, the information exchange, the execution process, and the like between the modules and the units are based on the same concept as the method embodiment of the present application, and the specific content is also applicable to The working device of the laser. The various modules in the embodiments of the present application can be implemented as separate hardware or software, and a combination of functions of the respective units can be implemented using separate hardware or software as needed.

The embodiment of the present application provides a laser working device, which receives a preset first waveform data packet, and verifies the first waveform data packet to determine whether it meets a preset standard, and if yes, saves First waveform data in the first waveform data packet, and outputting a laser pulse according to the first waveform data, wherein the first waveform data packet includes first waveform data composed of digital signals. Since the laser directly receives digital waveform data, thereby reducing errors in the data transmission process, it is advantageous to improve the accuracy of the final output laser pulse; in addition, the embodiment simplifies the application scenario of the laser and improves the application intelligence of the laser. Sex.

Please refer to FIG. 6. FIG. 6 is a schematic diagram showing the hardware structure of the laser 30 for performing the working method of the laser according to the embodiment of the present application. The laser may be a QCW laser. As shown in FIG. 6, the laser 30 includes:

One or more processors 31 and a memory 32 are exemplified by a processor 31 in FIG.

The processor 31 and the memory 32 may be connected by a bus or other means, as exemplified by a bus connection in FIG.

The apparatus for performing the working method of the laser may further include: an input device 33 and an output device 34.

The memory 32 is a non-volatile computer readable storage medium and can be used for storing a non-volatile software program, a non-volatile computer-executable program, and a module, such as a program corresponding to the working method of the laser in the embodiment of the present application. An instruction/module (for example, the first receiving module 21, the verification module 22, the first processing module 23, the second receiving module 24, the second processing module 25, the transmitting module 26, the third processing module 27, and the like shown in FIG. 5; The third receiving module 28). The processor 31 executes various functional applications of the server and data processing by executing non-volatile software programs, instructions, and modules stored in the memory 32, that is, the method of operating the laser of the above method embodiment.

The memory 32 may include a storage program area and an storage data area, wherein the storage program area may store an operating system, an application required for at least one function; the storage data area may store data created according to usage of the working device of the laser, and the like. Moreover, memory 32 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 32 may optionally include memory remotely located relative to processor 31, which may be connected to the working device of the laser via a network. Examples of such networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

Input device 33 can receive the input digital or character information and generate key signal inputs related to user settings and function control of the working device of the laser. Output device 34 can include a display device such as a display screen.

The one or more modules are stored in the memory 32, and when executed by the one or more processors 31, the method of operating the laser in any of the above method embodiments is performed, for example, performing the above described FIG. In the method steps 101 to 103 in the method, the method steps 1021 to 1023 in FIG. 2, the method steps 101 to 106 in FIG. 3, and the method steps 101 to 108 in FIG. 4, the module 21 in FIG. 5 is implemented. 28. Function of units 221-223.

The above products can perform the methods provided by the embodiments of the present application, and have the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the method provided by the embodiments of the present application.

Please refer to FIG. 7. FIG. 7 is a schematic structural diagram of a laser cutting and welding system according to an embodiment of the present application. As shown in FIG. 7, the system 40 includes a quasi-continuous laser 41 and a host computer 42. The quasi-continuous laser 41 is connected to the upper computer 42.

Referring to FIG. 7 , the quasi-continuous laser 41 includes a controller 411 , an FPGA 412 , a photo sensor 413 , a DAC chip 414 , an optical power tester 415 , and a control interface 416 . The upper computer 42 is provided with a card 421, and the card 421 may specifically be a printed circuit board.

The controller 411 is connected to the FPGA 412 and the upper computer 42 respectively. The controller 411 has a serial communication function, can receive the command sent by the host computer 42, and parse the command. The command sent by the host computer 42 mainly includes a task command and a data command, and the task command includes the host computer 42 to be quasi-continuous. The control command sent by the laser 41. The data command includes an instruction to perform data interaction between the host computer 42 and the quasi-continuous laser 41, such as reading internal information of the controller 411, configuring an operating current to the quasi-continuous laser 41, and the like. The controller 411 is further configured to communicate with the FPGA 412, and may forward the internal running state of the FPGA 412 to the upper computer 42, or forward the instruction of the upper computer 42 to the FPGA 412 to the FPGA 412, and the controller 411 and The FPGA 412 communicates directly using the serial bus. The controller 411 is further configured to monitor an internal operation signal of the quasi-continuous laser 41, specifically including an operation signal on the optical path of the quasi-continuous laser 41, such as a temperature of the pump source LD, an ambient temperature of the laser cavity, and a current of the pump source. Voltage and so on. After the controller 411 is powered on, it starts to monitor the internal running signal of the continuous laser 41. If there is a signal exceeding the standard, the controller 411 sends an instruction to the FPGA 412 to stop the FPGA 412 and record the alarm signal.

In this embodiment, the controller 411 is configured to receive a preset first waveform data packet sent by the host computer 42, and perform verification on the received first waveform data packet to determine the first waveform. Whether the first waveform data in the data packet meets a preset criterion, and if the first waveform data in the first waveform data packet meets a preset standard, saving the first waveform data, wherein the preset The first waveform data packet includes first waveform data composed of digital signals. The controller 411 is further configured to receive a waveform switching instruction sent by the host computer 42, acquire waveform information of the waveform to be switched according to the received waveform switching instruction, convert the waveform information into a laser control instruction, and The laser control command is sent to the FPGA 412.

The FPGA 412 is connected to the photosensor 413, the DAC chip 414, and the control interface 416, respectively. The first function of the FPGA 412 is to interact with the board 421, such as receiving an IO control signal sent by the board 421, and the control signal includes a switch laser, an emergency stop, and the like. The second function of the FPGA 412 is to receive the signal of the photosensor 413. After the laser is turned on, the FPGA 412 monitors the signal of the photosensor 413 in real time. If the optical path is on and off and the laser power is normal, the whole optical path is normal. If the PD signal is abnormal, the optical path is abnormal, and the quasi-continuous laser 41 is turned off. The third function of the FPGA 412 is to control the DAC chip 414 to control the operating current of the laser pumped LD through the DAC chip 414. In some other embodiments, the optical path structure of the quasi-continuous laser 41 further includes an acousto-optic modulator, and the FPGA 412 is also used to control the current or voltage of the acousto-optic modulator.

In this embodiment, the FPGA 412 is mainly used to output a laser pulse according to the first waveform data, and is further configured to control switching of a waveform according to the laser control instruction.

The photosensor 413 is configured to collect an optical pulse signal in real time, convert the optical pulse signal into an electrical pulse signal, and send the electrical pulse signal to the FPGA 412 to make the FPGA 412 according to the received The electrical pulse signal determines whether the optical path is normal. In this embodiment, the FPGA 412 learns the state of the laser pulse through the electrical pulse signal of the photosensor 413, and receives the PD signal in the corresponding time period during each laser light extraction process. It should be noted that the number of the photosensors 413 may include one or more, which is not limited herein.

The DAC chip 414 is configured to receive a digital signal transmitted by the FPGA 412 and convert the digital signal into an analog quantity for controlling an operating current of the quasi-continuous laser 41. The working current is determined according to the power level corresponding to the first waveform data. When 100% power, the DAC chip 414 outputs the rated current. When the power is 50%, the DAC chip 414 outputs 50%. The operating current, when the output of the DAC chip 414 is 0, actually turns off the laser pumping of the quasi-continuous laser 41, whereby the laser can be turned off by the DAC chip 414, thereby protecting The quasi-continuous laser 41. It should be noted that the number of the DAC chips 414 may include one or more, which is not limited herein, and the number of the DAC chips 414 corresponds to the number of laser pumping LDs.

The optical power tester 415 is connected to the controller 411 for receiving a preset operating current, and determining whether the operating current meets a preset rated current, and if so, sending a rating to the controller 411 Current configuration completion command. The controller 411 controls the FPGA 412 to output a laser pulse according to the first waveform data according to the rated current configuration completion instruction. In the present embodiment, the power of the output light is detected by the optical power tester 415 to determine whether the operating current of the quasi-continuous laser 41 meets the requirements, thereby ensuring the stability of the quasi-continuous laser 41 during operation.

The control interface 416 may specifically be a DB25 control interface. Each of the IOs in the control interface 416 can have its own definition, such as switching laser IO, guiding light control IO, emergency stop IO, laser alarm IO, etc., and the present application controls the quasi-continuous laser 41 by the upper computer 42. Switching laser IO, guiding light control IO, emergency stop IO, laser alarm IO.

In other embodiments, referring also to FIG. 7, the quasi-continuous laser 41 further includes a temperature sensor 417 and an alarm 418, and the temperature sensor 417 and the alarm 418 are respectively connected to the controller 411, The temperature sensor 417 is configured to collect the temperature of the quasi-continuous laser 41 and send the temperature to the controller 411. When the temperature exceeds the threshold, the alarm 418 is configured to receive an alarm sent by the controller 411. An instruction to cause an alarm according to the alarm instruction. In addition to alarming when the temperature exceeds the threshold, the alarm 418 can also alarm when the current is abnormal, alarm when the voltage is abnormal, alarm when the PD signal is abnormal, and the like. In addition, the alarm information can also be transmitted to the upper computer 42 through the controller 411, so that the upper computer user can grasp the state of the quasi-continuous laser 41 in time.

The upper computer 42 is mainly used for communicating with the quasi-continuous laser 41, and can perform command interaction with the quasi-continuous laser 41 by using a serial port, and the upper computer 42 can send an instruction to the quasi-continuous laser 41, such as a light-opening command, The optical command can read status information inside the quasi-continuous laser 41, such as laser temperature alarm and PD alarm. It is also possible to read various configuration values inside the laser of the quasi-continuous laser 41. When the quasi-continuous laser 41 is shipped from the factory, its rated current can be configured in advance to allow the quasi-continuous laser 41 to reach the rated operating power, and the quasi-continuous laser 41 can control the laser pumping current depending on the configured current value. Wherein, in the process of configuring the rated current of the quasi-continuous laser 41, the operating current can be written into the quasi-continuous laser 41 by the host computer 42 at the time of shipment.

In this embodiment, the upper computer 42 is configured to generate a preset first waveform data packet, and send the preset first waveform data packet to the quasi-continuous laser 41, where the pre- The first waveform data packet is set to include first waveform data composed of digital signals.

In other embodiments, referring also to FIG. 7 , the system 40 further includes a galvanometer 43 . The upper computer 42 is provided with a card 421 , and the card 421 is connected to the control interface 416 . The galvanometer 43 may specifically be a set of mirrors, and the direction of the light is rotated by controlling the movement of the galvanometer 43. The card 421 of the upper computer 42 is used to simulate the actual use of the quasi-continuous laser 41. In actual use, the quasi-continuous laser 41 is controlled by the card 421, specifically, by the above control. Interface 416 interfaces with the quasi-continuous laser 41 for control interaction. Therefore, after the quasi-continuous laser 41 is configured, the board 421 can be used to transmit a control signal to the quasi-continuous laser 41, thereby controlling the quasi-continuous laser 41. In this embodiment, the board 421 is configured to control the movement of the galvanometer 43 according to the first waveform data. Here, it can be tested by the board 421 whether the response of the quasi-continuous laser 41 to the received external control signal is correct, and whether the control interface 416 is normal can also be tested.

In other embodiments, the system further includes a transmission mechanism, which may be specifically a motor. The quasi-continuous laser 41 also includes a laser output head that is fixed to the laser output head and that causes its movement. The transmission mechanism is further connected to the card 421 through the control interface 416. At this time, the card 421 is configured to control the transmission mechanism to drive the laser output head to move according to the first waveform data.

Wherein, in the case where the galvanometer 43 is required to be moved, the system 40 is generally used for laser welding. The system 40 is typically used for laser cutting where the above-described transmission mechanism is required to drive the movement of the laser output head. Of course, in the actual application process, the system 40 can also be used for laser cutting when the galvanometer 43 is required to move; when the above-mentioned transmission mechanism is required to drive the laser output head to move, the system 40 is used for Laser welding.

The embodiment of the present application provides a laser cutting and welding system, the system includes a quasi-continuous laser and a host computer, wherein the quasi-continuous laser is configured to acquire a preset first waveform data packet from the upper computer, and the first waveform is obtained. The data packet is checked to determine whether it meets the preset standard. If it matches, the first waveform data in the first waveform data packet is saved, and the laser pulse is output according to the first waveform data, and the first waveform data packet includes a number. The first waveform data composed of signals. Since the quasi-continuous laser directly acquires digital waveform data, the error in the data transmission process is reduced, thereby improving the precision of the laser pulse outputted by the system, and simplifying the application scenario of the system, and improving the laser cutting and welding system. The intelligence of the application.

The embodiment of the present application provides a non-transitory computer readable storage medium storing computer-executable instructions that are executed by an electronic device to perform any of the above method embodiments. The working method of the laser, for example, performs the method steps 101 to 103 in FIG. 1 described above, the method steps 1021 to 1023 in FIG. 2, the method steps 101 to 106 in FIG. 3, and the method in FIG. Method steps 101 to 108 implement the functions of modules 21-28, 221-223 in FIG.

An embodiment of the present application provides a computer program product, including a computing program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, The computer performs the working method of the laser in any of the above method embodiments, for example, performing the method steps 101 to 103 in FIG. 1 described above, the method steps 1021 to 1023 in FIG. 2, and the method step 101 in FIG. Step 106, method steps 101 to 108 in FIG. 4, implement the functions of modules 21-28, 221-223 in FIG.

The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

Through the description of the above embodiments, those skilled in the art can clearly understand that the various embodiments can be implemented by means of software plus a general hardware platform, and of course, by hardware. A person skilled in the art can understand that all or part of the process of implementing the above embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited thereto; in the idea of the present application, the technical features in the above embodiments or different embodiments may also be combined. The steps may be carried out in any order, and there are many other variations of the various aspects of the present application as described above, which are not provided in the details for the sake of brevity; although the present application has been described in detail with reference to the foregoing embodiments, The skilled person should understand that the technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the embodiments of the present application. The scope of the technical solution.

Claims

A method of operating a laser, characterized in that the method comprises:

Receiving a preset first waveform data packet, where the preset first waveform data packet includes first waveform data composed of digital signals;

Performing verification on the received first waveform data packet, and determining whether the first waveform data in the first waveform data packet meets a preset standard;

And if the first waveform data in the first waveform data packet conforms to a preset standard, saving the first waveform data, and outputting a laser pulse according to the first waveform data.
The method according to claim 1, wherein the verifying the received first waveform data packet, determining whether the first waveform data in the first waveform data packet meets a preset standard ,include:

Parsing the first waveform data packet to obtain first waveform data;

Checking whether the first waveform data is lost by a checksum;

Determining whether the preset parameter of the first waveform data meets a preset laser standard if the first waveform data is not lost, and when the preset parameter of the first waveform data meets a preset laser standard, The first waveform data in the first waveform data packet conforms to a preset criterion, and when the preset parameter of the first waveform data does not meet the preset laser standard, the first waveform data in the first waveform data packet is not Meet the preset standards.
The method according to claim 1, wherein the first waveform data composed of the digital signal is obtained by editing a preset waveform, wherein the editing the preset waveform comprises: The preset waveform is edited into a packet of a preset format.
The method according to claim 1, wherein said outputting the laser pulse according to said first waveform data comprises:

Receiving a preset operating current;

Determining whether the working current meets a preset rated current;

If so, the first waveform data is controlled to output a laser pulse.
The method according to claim 4, wherein the determining whether the operating current satisfies a preset rated current comprises:

Obtaining the power of the laser output light;

Comparing the power of the output light with a preset power value, if the power of the output light is equal to a preset power value, indicating that the working current meets a preset rated current, if the output light power If the power value is less than or greater than the preset power value, it indicates that the working current does not meet the preset rated current.
The method according to claim 2, wherein the preset parameters of the first waveform data comprise at least one of laser pulse energy, laser waveform duty ratio, and laser waveform frequency.
The method according to any one of claims 1 to 6, wherein the method further comprises:

Receiving a waveform switching instruction;

Obtaining waveform information of the waveform to be switched according to the received waveform switching instruction, and converting the waveform information into a laser control instruction;

Transmitting the laser control command to the FPGA to cause the FPGA to control switching of the waveform according to the laser control command.
The method according to any one of claims 1 to 7, wherein the method further comprises:

If the first waveform data in the first waveform data packet does not meet a preset criterion, sending the first waveform data does not meet the preset standard instruction feedback;

Receiving a preset second waveform data packet returned according to the instruction, wherein the preset second waveform data packet comprises second waveform data composed of digital signals.
A quasi-continuous laser, characterized in that the quasi-continuous laser comprises: a controller and an FPGA,

The controller is configured to receive a preset first waveform data packet, check the received first waveform data packet, and determine whether the first waveform data in the first waveform data packet meets a preset a standard, if the first waveform data in the first waveform data packet meets a preset standard, saving the first waveform data, wherein the preset first waveform data packet comprises a digital signal a waveform data;

The FPGA is configured to acquire the first waveform data from the controller, and output a laser pulse according to the first waveform data.
The quasi-continuous laser according to claim 9, wherein the controller is specifically configured to:

Receiving a preset first waveform data packet;

Parsing the first waveform data packet to obtain first waveform data;

Checking whether the first waveform data is lost by a checksum;

Determining whether the preset parameter of the first waveform data meets a preset laser standard if the first waveform data is not lost, and when the preset parameter of the first waveform data meets a preset laser standard, The first waveform data in the first waveform data packet conforms to a preset criterion, and when the preset parameter of the first waveform data does not meet the preset laser standard, the first waveform data in the first waveform data packet is not Meet the preset standards;

Saving the first waveform data if the first waveform data in the first waveform data packet meets a preset standard, wherein the preset first waveform data packet includes first waveform data composed of digital signals .
The quasi-continuous laser according to claim 9, wherein the FPGA is specifically configured to:

Acquiring the first waveform data from the controller;

Receiving a preset operating current;

Determining whether the working current meets a preset rated current;

If so, the first waveform data is controlled to output a laser pulse.
The quasi-continuous laser according to claim 10, wherein the preset parameters of the first waveform data comprise at least one of laser pulse energy, laser waveform duty ratio, and laser waveform frequency.
The quasi-continuous laser of claim 9 wherein:

The controller is further configured to receive a waveform switching instruction, acquire waveform information of the waveform to be switched according to the received waveform switching instruction, convert the waveform information into a laser control instruction, and send the laser control instruction To the FPGA;

The FPGA is further configured to control switching of a waveform according to the laser control instruction.
The quasi-continuous laser according to claim 9, wherein the quasi-continuous laser further comprises: a photosensor and a DAC chip, wherein the photosensor and the DAC chip are respectively connected to the FPGA,

The photoelectric sensor is configured to collect an optical pulse signal in real time, convert the optical pulse signal into an electrical pulse signal, and send the electrical pulse signal to the FPGA, so that the FPGA according to the received electrical pulse The signal determines whether the optical path is normal;

The DAC chip is configured to receive a digital signal transmitted by the FPGA and convert the digital signal to an analog quantity for controlling an operating current of the quasi-continuous laser.
The quasi-continuous laser according to any one of claims 9 to 14, wherein the quasi-continuous laser further comprises: an optical power tester connected to the controller,

The optical power tester is configured to receive a preset operating current, and determine whether the working current meets a preset rated current, and if yes, send a rated current configuration completion instruction to the controller;

The controller controls the FPGA to output a laser pulse according to the first waveform data according to the rated current configuration completion instruction.
The quasi-continuous laser according to any one of claims 9 to 15, wherein the quasi-continuous laser further comprises: a temperature sensor and an alarm,

The temperature sensor and the alarm are respectively connected to the controller, the temperature sensor is configured to collect the temperature of the quasi-continuous laser, and send the temperature to a controller, when the temperature exceeds a threshold, the The alarm is configured to receive an alarm command sent by the controller, thereby performing an alarm according to the alarm instruction.
A laser cutting and welding system, comprising: the quasi-continuous laser according to any one of claims 9 to 16, and a host computer,

The upper computer is configured to generate a preset first waveform data packet, and send the preset first waveform data packet to the quasi-continuous laser, wherein the preset first waveform data packet includes a number The first waveform data composed of signals.
The system according to claim 17, wherein said system further comprises a galvanometer, said quasi-continuous laser is provided with a control interface, said upper computer is provided with a card, said card passing through said control interface Connected to the quasi-continuous laser, the board is configured to control movement of the galvanometer according to the first waveform data.
The system of claim 17 wherein said system further comprises a transmission mechanism, said quasi-continuous laser comprising a laser output head, said transmission mechanism being fixed to said laser output head and driving said movement a continuous interface is provided with a control interface, the upper computer is provided with a card, and the card is connected to the transmission mechanism through the control interface, and the card is used to control the transmission according to the first waveform data The mechanism drives the laser output head to move.
A non-transitory computer readable storage medium, wherein the computer readable storage medium stores computer executable instructions that, when executed by an electronic device, cause the electronic device to enforce rights The method of any of 1-8 is claimed.