CN116690005B - Control method of double-laser sub-control circuit based on PWM - Google Patents
Control method of double-laser sub-control circuit based on PWM Download PDFInfo
- Publication number
- CN116690005B CN116690005B CN202310884160.6A CN202310884160A CN116690005B CN 116690005 B CN116690005 B CN 116690005B CN 202310884160 A CN202310884160 A CN 202310884160A CN 116690005 B CN116690005 B CN 116690005B
- Authority
- CN
- China
- Prior art keywords
- laser
- signal
- power ratio
- module
- central processing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012545 processing Methods 0.000 claims abstract description 87
- 230000009977 dual effect Effects 0.000 claims abstract description 21
- 238000004364 calculation method Methods 0.000 claims description 36
- 238000004891 communication Methods 0.000 claims description 23
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 34
- 229910002092 carbon dioxide Inorganic materials 0.000 description 17
- 238000010330 laser marking Methods 0.000 description 11
- 230000001360 synchronised effect Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- 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
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/414—Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller
- G05B19/4142—Structure of the control system, e.g. common controller or multiprocessor systems, interface to servo, programmable interface controller characterised by the use of a microprocessor
-
- 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
- B23K26/36—Removing material
- B23K26/362—Laser etching
-
- 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
- B23K26/702—Auxiliary equipment
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Mechanical Engineering (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Human Computer Interaction (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention discloses a control method of a double-laser sub-control circuit based on PWM, and belongs to the technical field of lasers. The dual-laser sub-control circuit is used for controlling multiple working modes of the dual lasers, so that the selection space of a user is fully expanded; meanwhile, the duty ratio X of the PWM signal wave is acquired through the PWM signal acquisition unit, and the central processing module respectively determines the light-emitting power of the first laser and the light-emitting power of the second laser according to the duty ratio X of the PWM signal wave, so that the invention can adopt a double-tube CO2 laser to cooperate with light-emitting, thereby not only reserving the high-power superiority of the single-tube CO2 laser, but also realizing the fine and stable characteristics of low-power lines of the laser; the high power instability and low energy band instability characteristics due to single tube lasers are also addressed.
Description
Technical Field
The invention belongs to the technical field of lasers, and particularly relates to a control method of a double-laser sub-control circuit based on PWM.
Background
The laser marking machine is light and electromechanical integrated equipment integrating laser technology and computer technology. The laser marking technology is being increasingly valued in the industry at home and abroad at present, various novel marking equipment is layered endlessly, the unique advantages of the laser marking technology are being used for replacing the traditional marking method, and marks can be printed on the surfaces of various mechanical parts, electronic components, integrated circuit modules, instruments, meters and other objects. As in the prior art, chinese patent publication No. CN103832086a discloses a carbon dioxide laser marking machine, wherein the carbon dioxide laser marking machine is suitable for hand engraving of most nonmetallic materials and a part of metal manufacture.
However, the existing CO2 laser marking machine adopts a single high-power CO2 laser, and when the existing CO2 laser marking machine uses high-power/low-power laser for marking, the unstable laser condition can occur, thereby affecting the quality and efficiency of laser marking. Thus, a double-tube CO2 laser has been proposed to solve the problem of high power/low power instability of a single-tube CO2 laser; in practical application, how to control the dual-tube CO2 laser to achieve laser marking under different power conditions is a major technical problem and defect in the art.
Therefore, a control method of a PWM-based dual laser sub-control circuit is needed to solve the above-mentioned problems.
Disclosure of Invention
Aiming at the problems in the related art, the invention provides a control method of a double-laser sub-control circuit based on PWM (pulse-width modulation) so as to overcome the technical problems existing in the related art, and the double-laser is provided with a plurality of working modes, thereby expanding the selection space; meanwhile, the duty ratio X of the PWM signal wave is acquired through the PWM signal acquisition unit, and the central processing module respectively determines the light-emitting power of the first laser and the light-emitting power of the second laser according to the duty ratio X of the PWM signal wave, so that the double-tube CO2 laser can be matched with light-emitting, and the double-laser can not only keep the high power advantage of the single-tube CO2 laser, but also realize the fine and stable characteristics of low-power lines of the laser; the unstable characteristics of a single-tube high-power laser and a low-energy section are solved.
The technical scheme of the invention is realized as follows: the control method of the double-laser sub-control circuit based on PWM comprises a first laser and a second laser, wherein the first laser and the second laser are respectively connected with the double-laser sub-control circuit; the first laser and the second laser are configured with a plurality of working modes; the double-laser sub-control circuit is connected with an external PWM signal wave setting circuit, and the PWM signal wave setting circuit is used for transmitting PWM signal waves, AP signals and DO signals to the double-laser sub-control circuit;
The double-laser sub-control circuit comprises a central processing module, a PWM signal input module, a first laser control module and a second laser control module; the PWM signal input module, the first laser control module and the second laser control module are respectively connected with the central processing module;
preferably, the central processing module is a control chip;
the PWM signal input module is used for acquiring PWM signals, AP signals and DO signals output by the PWM signal wave setting circuit and comprises a PWM signal acquisition unit, an AP signal acquisition unit and a DO signal acquisition unit; wherein, the AP signal is a laser on/off signal of a twin laser; the AP signal acquisition unit is used for acquiring AP signals and transmitting the AP signals to the central processing module; the PWM signal acquisition unit is used for acquiring the duty ratio X of an externally input PWM signal wave and transmitting the acquired duty ratio X of the PWM signal wave to the central processing module;
the first laser control module is connected with the first laser through a first laser interface, and the second laser control module is connected with the second laser through a second laser interface;
the first laser interface and the second laser interface are used for connecting corresponding lasers and outputting control signals of different working modes to the connected lasers;
The control method of the double-laser sub-control circuit based on PWM comprises the following steps:
step S1: the central processing module determines the working modes to be adopted by the first laser and the second laser according to the mode designating signal;
step S2: the AP signal acquisition unit acquires an AP signal, and the central processing module determines the on/off of the first laser and the second laser according to the AP signal;
step S3: the method comprises the steps that a PWM signal acquisition unit acquires the duty ratio X of a PWM signal wave, and a central processing module respectively determines the light-emitting power of a first laser and the light-emitting power of a second laser according to the duty ratio X of the PWM signal wave;
step S4: the central processing module transmits a PWM1 signal appointed by the light-emitting power of the first laser to the first laser control module; meanwhile, the central processing module transmits a PWM2 signal appointed by the light-emitting power of the second laser to the second laser control module;
step S5: the first laser and the second laser respectively finish laser emission according to PWM1 signals and PWM2 signals.
Further, the double-laser sub-control circuit also comprises a communication module and a manual signal input module; the communication module is connected with the central processing module;
The communication module comprises a serial communication interface, and is communicated with other circuits or computers through the serial communication interface;
preferably, the serial communication interface comprises an RS232 serial communication interface and an RS485 serial communication interface.
Further, the manual signal input module comprises a plurality of control ports connected with the central processing module, and each control port corresponds to different mode designating signals; the manual signal input module inputs different mode designating signals to the central processing module through each control port to designate that the first laser and the second laser adopt different working modes;
or, the DO signal is a mode designating signal; the DO signal acquisition unit is used for designating different working modes of the first laser and the second laser by transmitting different DO signals to the central processing module;
further, the manual signal input module is a first priority circuit and is used for transmitting mode designating signals corresponding to all the control ports to the central processing module; the PWM signal input module is a second priority circuit and is used for transmitting the acquired PWM signals, AP signals and DO signals to the central processing module; wherein the signal of the first priority circuit is transmitted before the signal of the second priority circuit; when the manual signal input module and the PWM signal input module both input the mode specification signal, the mode specification signal input by the manual signal input module is preferentially transmitted.
Preferably, the dual laser sub-control circuit is printed on a circuit board, and a plurality of switch buttons corresponding to the control ports of the manual signal input module are arranged on the circuit board, and the on/off states of the switch buttons are used for controlling the validity/invalidity of input signals; a plurality of said control ports, labeled as port IN1, port IN2 and port IN3, respectively;
the port IN1 is connected with an input port PA8 of the central processing module and is used for inputting a valid/invalid first laser working signal, wherein the input is valid for representing the first laser working signal and the input is invalid for representing the first laser non-working signal;
the port IN2 is connected with an input port PD15 of the central processing module and is used for inputting a valid/invalid second laser working signal, wherein the input of the valid second laser working signal and the input of the invalid second laser working signal are respectively represented;
the port IN3 is connected with an input port PD14 of the central processing module, and is used for inputting asynchronous light output signals/synchronous light output signals of the first laser and the second laser, inputting invalid synchronous light output signals of the twin lasers, and inputting valid synchronous light output signals of the twin lasers.
Preferably, the working mode includes a mode one, wherein the mode one is that the first laser and the second laser work simultaneously, and the double lasers emit light asynchronously;
preferably, the working modes further comprise a mode two, a mode three and a mode four;
the second mode is that the first laser and the second laser work simultaneously, and the double lasers emit light synchronously;
the third mode is that the first laser works, and the second laser does not work;
the fourth mode is that the first laser does not work and the second laser works;
in the present invention, the provision of two lasers operating simultaneously is advantageous for achieving higher power.
Further, the synchronous light emission means that the lasers with equal power are output by the double lasers simultaneously. The asynchronous light-emitting means that the double lasers can preset and select the first or the second lasers as the main lasers, one of the lasers is used for light-emitting operation in the power coverage range, and the other laser is controlled to be used as the auxiliary laser to be matched for light-emitting after the power coverage range is exceeded, so that the laser power which is set in advance is achieved;
further, in the process of out-of-step light emission, the main laser and the auxiliary laser emit light simultaneously, and the auxiliary laser is in a low-energy power section, so that the auxiliary laser is easy to have the problem of unstable laser output power; the unstable output power of the low-energy power section refers to unstable light emission when the laser is below a certain power value;
For example, assuming an output power below 50W, the laser may be unstable in light emission; when the out-of-step light emission is adopted, the total laser output power is 360W, the maximum laser output power of the main laser is 350W, the main laser output is controlled to be 350W and the auxiliary laser output is controlled to be 10W according to a normal principle, in this case, the auxiliary laser can encounter the condition of low energy instability, and for this case, the auxiliary laser is controlled to avoid a low energy power section by setting a program in the central processing module so as to completely solve the phenomenon, for example, the central processing module can control the main laser output to be 300W and the auxiliary laser output to be 60W so as to avoid the low energy power section;
in the invention, the synchronous light emission and the asynchronous light emission do not affect the total output power, but affect the fineness of marking effect, and the characteristic of fineness and stability of the low-power line of the laser can be realized by using the asynchronous light emission.
Preferably, the DO signal includes a DI1 signal, a DI2 signal, a DI3 signal, and a DI4 signal; the DO signal acquisition unit comprises a port DI1, a port DI2, a port DI3 and a port DI4;
the port DI1 is connected with an input port PA9 of the central processing module and is used for transmitting DI1 signals to designate a mode I of the twin lasers; the port DI2 is connected with an input port PA10 of the central processing module and is used for transmitting DI2 signals to designate a second mode; the port DI3 is connected with an input port PA11 of the central processing module and is used for transmitting DI3 signals to designate a mode III; the port DI4 is connected to the input port PA12 of the central processing module for transmitting DI4 signals to designate mode four.
Preferably, the PWM signal input module further includes a signal input interface, which receives externally input PWM signals, AP signals, and DO signals through the signal input interface;
in the PWM signal input module, a signal output end of the PWM signal acquisition unit is connected with an input port PA0 of the central processing module, and a signal output end of the AP signal acquisition unit is connected with an input port PA2 of the central processing module.
Preferably, the duty ratio X of the PWM signal wave ranges from 0.0% to X max Wherein X is max Is the maximum value of the duty cycle X;
in the first laser, the percentage of the light-emitting power to the total laser power is set as A, which is simply referred to as a first laser power ratio A, wherein the percentage of the actual maximum light-emitting power to the total laser power is A max ＝60.0％；
In the second laser, the percentage of the light-emitting power to the total laser power is set as B, which is simply referred to as a second laser power ratio B, wherein the percentage of the actual maximum light-emitting power to the total laser power is B max ＝60.0％；
When x=y, the laser energy of the first laser or the second laser is kept at both good stability and high power.
Preferably, the dual laser sub-control circuit further comprises a power supply module, an SWD simulator interface and a storage module; the power module, the SWD simulator interface and the storage module are respectively connected with the central processing module;
The SWD simulator interface is an interface for testing the central processing module;
the method comprises the steps that a first laser power ratio A and a second laser power ratio B which are different in duty ratio X and correspond to four working modes are preset in a storage module; a PWM1 signal corresponding to the first laser power ratio A and a PWM2 signal corresponding to the second laser power ratio B are preset;
the voltage input end of the power module is connected with an external power supply, and the voltage output end of the power module is connected with the input port PB4 of the central processing module; the power supply module is used for inputting the input voltage U of an external power supply in Is converted into the working voltage U of the central processing module out 。
Preferably, under the condition that the dual laser adopts the first working mode, the calculation process of the first laser power ratio a and the second laser power ratio B is as follows:
case one: when the duty ratio X is 0.0% to Y, the calculation formula of the power ratio A of the first laser isAt this time, the second laser power ratio b=0.0%;
and a second case: the first laser power ratio when the duty ratio X is from Y to 2YAt this time, the calculation formula of the second laser power ratio B is +. >
And a third case: duty ratio X is from 2Y toWhen the first laser power ratio A is calculated asAt this time, the second laser power ratio +.>
Case four: duty cycle X belongs toTo X max When the first laser power ratio a=60.0%,at this time, the calculation formula of the second laser power ratio B is +.>
Preferably, when the dual lasers adopt the second working mode, the calculation formula of the power ratio A of the first laser is as followsAt this time, the calculation formula of the second laser power ratio B is +.>
Preferably, when the twin laser adopts the third working mode, the second laser is turned off, and the second laser power ratio B is kept at 0.0%; the first laser power ratio A is calculated as follows:
case one: the duty cycle X is from 0.0% toWhen the first laser power ratio A is calculated as
And a second case: duty cycleWhen the first laser power ratio a=60.0%;
and a third case: duty cycle X belongs toTo X max When the first laser power ratio a=60.0%.
Preferably, when the dual lasers adopt the working mode four, the first laser is turned off, and the first laser power ratio a is kept at 0.0%; the calculation process of the second laser power ratio B is as follows:
Case(s)And (3) a step of: the duty cycle X is from 0.0% toWhen the calculation formula of the second laser power ratio B is
And a second case: duty cycleWhen the second laser power ratio b=60.0%;
and a third case: duty cycle X belongs toTo X max When the second laser power ratio b=60.0%.
Preferably, the PWM1 signal is used to control the actual light output power of the first laser, and the PWM2 signal is used to control the actual light output power of the second laser;
the first laser control module comprises a PWM1 signal input unit for receiving a PWM1 signal output by the central processing module; the second laser control module comprises a PWM2 signal input unit for receiving a PWM2 signal output by the central processing module;
the first laser control module and the second laser control module are respectively provided with a feedback unit;
the feedback unit is used for feeding back the working state of the laser to the central processing module;
the first laser and the second laser are both CO2 lasers.
The invention has the beneficial effects that:
(1) The invention provides a control method of a double-laser sub-control circuit based on PWM, which comprises a first laser and a second laser, wherein the first laser and the second laser are respectively connected with the double-laser sub-control circuit.
(2) The invention firstly obtains the duty ratio X of the PWM signal wave through the PWM signal acquisition unit, and then the central processing module respectively determines the light-emitting power of the first laser and the light-emitting power of the second laser according to the duty ratio X of the PWM signal wave; in addition, the storage module is pre-provided with the duty ratios X corresponding to the four working modes, and the different duty ratios X correspond to different first laser power ratios A and second laser power ratios B, so that the invention can realize the matching light emission of the double-tube CO2 laser and solve the problem of unstable high power and unstable low energy section of the single-tube laser.
(3) The double lasers in the invention can not only keep the high power advantage of the single-tube CO2 laser, but also realize the fine and stable characteristics of the low-power laser lines; the double-tube CO2 laser and the PWM-based double-laser sub-control circuit method are combined, so that the quality and the efficiency of laser marking of the CO2 laser marking machine are improved.
Drawings
FIG. 1 is a schematic diagram of a dual laser sub-control circuit according to the present invention;
FIG. 2 is a schematic circuit diagram of a power module according to the present invention;
FIG. 3 is a schematic circuit diagram of a memory module according to the present invention;
FIG. 4 is a circuit schematic of the SWD emulator interface of the present invention;
FIG. 5 is a schematic circuit diagram of a CPU module according to the present invention;
FIG. 6 is a schematic circuit diagram of a manual signal input module according to the present invention;
FIG. 7 is a schematic circuit diagram of a PWM signal input module according to the present invention;
FIG. 8 is a schematic circuit diagram of a communication module according to the present invention;
FIG. 9 is a circuit schematic of a first laser control module of the present invention;
FIG. 10 is a circuit schematic of a second laser control module of the present invention;
fig. 11 is a calculation diagram of a first laser power ratio a and a second laser power ratio B corresponding to a duty ratio X of a PWM signal wave according to the present invention;
FIG. 12 shows that the maximum value of the duty ratio Xmax of the PWM signal wave of the present invention is set to X max A calculation plot of the first laser power ratio a and the second laser power ratio B when= 90.0.0%, y= 40.0.0%.
Marking:
1. a central processing module; 2. a power module; 3. a communication module; 4. a storage module; 5. a PWM signal input module; 51. a PWM signal acquisition unit; 52. an AP signal acquisition unit; 53. a DO signal acquisition unit; 54. a signal input interface; 6. a manual signal input module; 7. a first laser control module; 71. a PWM1 signal input unit; 8. a second laser control module; 81. a PWM2 signal input unit; 9. a first laser interface; 10. a feedback unit; 11. a SWD emulator interface; 12. a second laser interface.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
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 apparatus or elements 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.
In this embodiment, as shown in fig. 1, a control method of a PWM-based dual-laser sub-control circuit, where the dual-laser includes a first laser and a second laser, where the first laser and the second laser are respectively connected to the dual-laser sub-control circuit; the first laser and the second laser are configured with a plurality of working modes; the double-laser sub-control circuit is connected with an external PWM signal wave setting circuit, and the PWM signal wave setting circuit is used for transmitting PWM signal waves, AP signals and DO signals to the double-laser sub-control circuit;
the double-laser sub-control circuit comprises a central processing module 1, a PWM signal input module 5, a first laser control module 7 and a second laser control module 8; the PWM signal input module 5, the first laser control module 7 and the second laser control module 8 are respectively connected with the central processing module 1;
the first laser control module 7 is connected with the first laser through a first laser interface 9, and the second laser control module 8 is connected with the second laser through a second laser interface 12;
the first laser interface 9 and the second laser interface 12 are used for connecting corresponding lasers and outputting control signals of different working modes to the connected lasers;
Specifically, as shown in fig. 5, the central processing module 1 is a control chip;
as shown in fig. 7, the PWM signal input module 5 is configured to collect PWM signals, AP signals and DO signals output by the PWM signal wave setting circuit, and includes a PWM signal collecting unit 51, an AP signal collecting unit 52 and a DO signal collecting unit 53; wherein, the AP signal is a laser on/off signal of a twin laser; the AP signal collecting unit 52 is configured to collect an AP signal and transmit the AP signal to the central processing module 1; the PWM signal collection unit 51, i.e. a pulse width modulation signal collection unit, is configured to collect a duty ratio X of an externally input PWM signal wave, and transmit the collected duty ratio X of the PWM signal wave to the central processing module 1;
the control method of the double-laser sub-control circuit based on PWM comprises the following steps:
step S1: the central processing module 1 determines the working modes to be adopted by the first laser and the second laser according to the mode designating signal;
step S2: the AP signal acquiring unit 52 acquires an AP signal, and the central processing module 1 determines on/off of the first laser and the second laser according to the AP signal;
step S3: the PWM signal acquisition unit 51 acquires the duty ratio X of the PWM signal wave, and the central processing module 1 respectively determines the light-emitting power of the first laser and the light-emitting power of the second laser according to the duty ratio X of the PWM signal wave;
Step S4: the central processing module 1 transmits a PWM1 signal specified by the light-emitting power of the first laser to the first laser control module 7; meanwhile, the central processing module 1 transmits a PWM2 signal specified by the light output power of the second laser to the second laser control module 8;
step S5: the first laser and the second laser respectively finish laser emission according to PWM1 signals and PWM2 signals.
Specifically, as shown in fig. 1, the dual laser sub-control circuit further comprises a communication module 3 and a manual signal input module 6; wherein, the communication module 3 is connected with the central processing module 1;
as shown in fig. 8, the communication module 3 includes a serial communication interface, which communicates with other circuits or computer connections through the serial communication interface;
specifically, the serial communication interface comprises an RS232 serial communication interface and an RS485 serial communication interface.
In this embodiment, as shown in fig. 6, the manual signal input module 6 includes a plurality of control ports connected to the central processing module 1, and each control port corresponds to a different mode designating signal; the manual signal input module 6 inputs different mode designating signals to the central processing module 1 through each control port to designate that the first laser and the second laser adopt different working modes;
Or as shown in fig. 7, the DO signal is a mode designating signal; the DO signal acquisition unit 53, which designates the first laser and the second laser to adopt different working modes by transmitting different DO signals to the central processing module 1;
specifically, the manual signal input module 6 is a first priority circuit, and is configured to transmit a mode designating signal corresponding to each control port to the central processing module 1; the PWM signal input module 5 is a second priority circuit, and is configured to transmit the collected PWM signal, AP signal, and DO signal to the central processing module 1; wherein the signal of the first priority circuit is transmitted before the signal of the second priority circuit; when the mode designation signal is inputted by both the manual signal input module 6 and the PWM signal input module 5, the mode designation signal inputted by the manual signal input module 6 is preferentially transmitted.
Specifically, as shown in fig. 6, the dual laser sub-control circuit is printed on a circuit board, and a plurality of switch buttons corresponding to the control ports of the manual signal input module 6 are arranged on the circuit board, and the on/off states of the switch buttons are used for controlling the validity/invalidity of the input signals; a plurality of said control ports, labeled as port IN1, port IN2 and port IN3, respectively;
The port IN1 is connected with an input port PA8 of the central processing module 1 and is used for inputting an effective/ineffective first laser working signal, wherein the input is effective for indicating the first laser working signal, and the input is ineffective for indicating the first laser non-working signal;
the port IN2 is connected with an input port PD15 of the central processing module 1 and is used for inputting an effective/ineffective second laser working signal, wherein the input is effective for indicating the second laser working signal, and the input is ineffective for indicating the second laser non-working signal;
the port IN3 is connected to the input port PD14 of the central processing module 1, and is used for inputting asynchronous light output signals/synchronous light output signals of the first laser and the second laser, inputting invalid synchronous light output signals of the twin lasers, and inputting valid synchronous light output signals of the twin lasers.
Specifically, the working modes include a mode one, wherein the mode one is that the first laser and the second laser work simultaneously, and the double lasers emit light asynchronously;
specifically, the working modes further comprise a mode two, a mode three and a mode four;
the second mode is that the first laser and the second laser work simultaneously, and the double lasers emit light synchronously;
The third mode is that the first laser works, and the second laser does not work;
the fourth mode is that the first laser does not work and the second laser works;
in this embodiment, providing two lasers operating simultaneously is advantageous for achieving higher power.
Specifically, the synchronous light emission means that the dual lasers simultaneously output lasers with equal power. The asynchronous light-emitting means that the double lasers can preset and select the first or the second lasers as the main lasers, one of the lasers is used for light-emitting operation in the power coverage range, and the other laser is controlled to be used as the auxiliary laser to be matched for light-emitting after the power coverage range is exceeded, so that the laser power which is set in advance is achieved.
Specifically, in the asynchronous light emitting process, the main laser and the auxiliary laser emit light simultaneously, and the auxiliary laser is in a low-energy power section, so that the auxiliary laser is easy to have the problem of unstable laser output power; the unstable output power of the low-energy power section refers to unstable light emission when the laser is below a certain power value;
the present embodiment controls the sub-laser to avoid the low-energy power section by setting a program in the central processing module 1 to completely solve the problem;
In this embodiment, the synchronous light emission and the asynchronous light emission do not affect the total output power, but affect the fineness of the marking effect, and the characteristic of fine and stable lines with low laser power can be realized by using the asynchronous light emission.
Specifically, as shown in fig. 7, the DO signal includes a DI1 signal, a DI2 signal, a DI3 signal, and a DI4 signal; the DO signal acquisition unit 53 includes a port DI1, a port DI2, a port DI3, and a port DI4;
the port DI1 is connected with an input port PA9 of the central processing module 1 and is used for transmitting DI1 signals to designate a mode I of the twin lasers; the port DI2 is connected with an input port PA10 of the central processing module 1 and is used for transmitting DI2 signals to designate a second mode; the port DI3 is connected with the input port PA11 of the central processing module 1 and is used for transmitting DI3 signals to designate a mode III; the port DI4 is connected to the input port PA12 of the central processing module 1 for transmitting DI4 signals to designate mode four.
Specifically, the PWM signal input module 5 further includes a signal input interface 54 that receives externally input PWM signals, AP signals, and DO signals through the signal input interface 54;
in the PWM signal input module 5, a signal output end of the PWM signal acquisition unit 51 is connected to the input port PA0 of the central processing module 1, and a signal output end of the AP signal acquisition unit 52 is connected to the input port PA2 of the central processing module 1.
As shown in FIG. 11, the duty ratio X of the PWM signal wave ranges from 0.0% to X max Wherein X is max Is the maximum value of the duty cycle X;
in the first laser, the percentage of the light-emitting power to the total laser power is set as A, which is simply referred to as a first laser power ratio A, wherein the percentage of the actual maximum light-emitting power to the total laser power is A max ＝60.0％；
In the second laser, the percentage of the light-emitting power to the total laser power is set as B, which is simply referred to as a second laser power ratio B, wherein the percentage of the actual maximum light-emitting power to the total laser power is B max ＝60.0％；
When x=y, the laser energy of the first laser or the second laser is kept at both good stability and high power.
Specifically, as shown in fig. 1, the dual laser sub-control circuit further includes a power module 2, a SWD emulator interface 11, and a memory module 4; the power module 2, the SWD simulator interface 11 and the storage module 4 are respectively connected with the central processing module 1;
as shown in fig. 4, the SWD emulator interface 11 is an interface for testing the central processing module 1;
as shown in fig. 3, in the storage module 4, a duty ratio X corresponding to four working modes is preset, and different duty ratios X correspond to different first laser power ratios a and second laser power ratios B; a PWM1 signal corresponding to the first laser power ratio A and a PWM2 signal corresponding to the second laser power ratio B are preset;
As shown in fig. 2, the voltage input end of the power module 2 is connected with an external power supply, and the voltage output end thereof is connected with the input port PB4 of the central processing module 1; the power module 2 is used for inputting the input voltage U of an external power supply in Is converted into an operating voltage U of the central processing module 1 out 。
Specifically, the PWM1 signal is used to control the actual light output power of the first laser, and the PWM2 signal is used to control the actual light output power of the second laser;
as shown in fig. 9, the first laser control module 7 includes a PWM1 signal input unit 71 for receiving the PWM1 signal output from the central processing module 1;
as shown in fig. 10, the second laser control module 8 includes a PWM2 signal input unit 81 for receiving the PWM2 signal output from the central processing module 1;
the first laser control module 7 and the second laser control module 8 are respectively provided with a feedback unit 10;
the feedback unit 10 is configured to feed back an operating state of the laser to the central processing module 1;
the first laser and the second laser are both CO2 lasers.
Specifically, as shown in fig. 11, under the condition that the dual laser adopts the first operation mode, the calculation process of the first laser power ratio a and the second laser power ratio B is as follows:
Case one: when the duty ratio X is 0.0% to Y, the calculation formula of the power ratio A of the first laser isAt this time, the second laser power ratio b=0.0%;
and a second case: the first laser power ratio when the duty ratio X is from Y to 2YAt this time, the calculation formula of the second laser power ratio B is +.>
And a third case: duty ratio X is from 2Y toWhen the first laser power ratio A is calculated asAt this time, the second laser power ratio +.>
Case four: duty cycle X belongs toTo X max When the first laser power ratio A=60.0%, the calculation formula of the second laser power ratio B is +.>
Specifically, when the dual lasers adopt the second working mode, the calculation formula of the power ratio a of the first laser is as followsAt this time, the calculation formula of the second laser power ratio B is +.>
Specifically, when the dual lasers adopt the third working mode, the second laser is turned off, and the second laser power ratio B is kept at 0.0%; the first laser power ratio A is calculated as follows:
case one: the duty cycle X is from 0.0% toWhen the first laser power ratio A is calculated as
And a second case: duty cycleWhen the first laser power ratio a=60.0%;
And a third case: duty cycle X belongs toTo X max When the first laser power ratio a=60.0%.
Specifically, when the dual lasers adopt the working mode four, the first laser is turned off, and the first laser power ratio A is kept to be 0.0%; the calculation process of the second laser power ratio B is as follows:
case one: the duty cycle X is from 0.0% toWhen the calculation formula of the second laser power ratio B is
And a second case: duty cycleWhen the second laser power ratio b=60.0%;
and a third case: duty cycle X belongs toTo X max When the second laser power ratio b=60.0%.
In this embodiment, the PWM signal acquisition unit 51 acquires the duty ratio X of the PWM signal wave, and the central processing module 1 determines the light output power of the first laser and the light output power of the second laser according to the duty ratio X of the PWM signal wave; in addition, the storage module 4 is pre-provided with the duty ratios X corresponding to the four working modes, and the different duty ratios X correspond to different first laser power ratios A and second laser power ratios B, so that the invention can realize the matching light emission of the double-tube CO2 laser and solve the problem of unstable high power and unstable low energy section of the single-tube laser.
As shown in fig. 12, the maximum value of the duty ratio X of the PWM signal wave is set to X max =90.0%; x=y=40.0%, at which time a=53.3% or b=53.3%, the laser energy of the first laser or the second laser achieves both good stability and high power;
when the dual lasers adopt one working mode, the calculation process of the first laser power ratio A and the second laser power ratio B is as follows:
case one: when the duty ratio X is 0.0% -40.0%, the calculation formula of the power ratio A of the first laser isAt this time, the second laser power ratio b=0.0%;
and a second case: when the duty ratio X is 40.0% -80.0%, the first laser power ratio a=53.3%, and at this time, the calculation formula of the second laser power ratio B is
And a third case: when the duty ratio X is 80.0% -85.0%, the calculation formula of the power ratio A of the first laser isAt this time, the second laser power ratio b=53.3%;
case four: when the duty ratio X is 85.0% -90.0%, the first laser power ratio a=60.0%, and at this time, the calculation formula of the second laser power ratio B is
When the dual lasers adopt the second working mode, the calculation formula of the power ratio A of the first laser is as follows At this time, the calculation formula of the second laser power ratio B is +.>
When the double lasers adopt a working mode III, the second laser is turned off, and the power ratio B of the second laser is kept to be 0.0%; the first laser power ratio A is calculated as follows:
case one: when the duty ratio X is 0.0% -45.0%, the calculation formula of the power ratio A of the first laser is
And a second case: the first laser power ratio a=60.0% with a duty cycle x=45.0%;
and a third case: when the duty cycle X is 45.0% -90.0%, the first laser power ratio a=60.0%.
Specifically, when the dual lasers adopt the working mode four, the first laser is turned off, and the first laser power ratio A is kept to be 0.0%; the calculation process of the second laser power ratio B is as follows:
case one: when the duty ratio X is 0.0% -45.0%, the calculation formula of the power ratio B of the second laser is
And a second case: a second laser power ratio b=60.0% at a duty cycle x=45.0%;
and a third case: the second laser power ratio b=60.0% when the duty cycle X belongs to 45.0% -90.0%.
As can be seen from the above embodiments, the combination of the twin lasers and the PWM-based twin laser sub-control circuit method of the present embodiment can effectively solve the high-power instability and low-energy section instability of a single-tube laser; for example, when the laser outputs 80.0% of light output power, the single-tube laser can only output 80.0%, and the invention can realize 80.0% of light output power through the matching of the double lasers, and meanwhile, the maximum value of the light output power of any one of the double lasers does not exceed 60.0% of the total light output power, thereby avoiding the high power instability of the single-tube laser; moreover, the range span of the light output power of the single-tube laser is large, the low-energy section of the single-tube laser has instability, and the range span of the light output power of the double-laser is small, and the low-energy section of the double-laser has better stability.
Variations and modifications to the above would be obvious to persons skilled in the art to which the invention pertains from the foregoing description and teachings. Therefore, the invention is not limited to the specific embodiments disclosed and described above, but some modifications and changes of the invention should be also included in the scope of the claims of the invention. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (9)
1. The control method of the double-laser sub-control circuit based on PWM is characterized in that the double-laser comprises a first laser and a second laser, and the first laser and the second laser are respectively connected with the double-laser sub-control circuit; the first laser and the second laser are configured with a plurality of working modes; the double-laser sub-control circuit is connected with an external PWM signal wave setting circuit, and the PWM signal wave setting circuit is used for transmitting PWM signal waves and AP signals to the double-laser sub-control circuit;
the double-laser sub-control circuit comprises a central processing module, a PWM signal input module, a first laser control module and a second laser control module; the PWM signal input module, the first laser control module and the second laser control module are respectively connected with the central processing module;
The PWM signal input module comprises a PWM signal acquisition unit and an AP signal acquisition unit; the PWM signal acquisition unit is used for acquiring the duty ratio X of an externally input PWM signal wave and transmitting the acquired duty ratio X of the PWM signal wave to the central processing module; the AP signal is a laser on/off signal of a double laser; the AP signal acquisition unit is used for acquiring AP signals and transmitting the AP signals to the central processing module;
the first laser control module is connected with the first laser through a first laser interface, and the second laser control module is connected with the second laser through a second laser interface;
the double-laser sub-control circuit also comprises a communication module and a manual signal input module; the communication module is connected with the central processing module; the communication module comprises a serial communication interface, and is communicated with other circuits or computers through the serial communication interface;
the manual signal input module comprises a plurality of control ports connected with the central processing module, and each control port corresponds to different mode designating signals; the manual signal input module inputs different mode designating signals to the central processing module through each control port to designate that the first laser and the second laser adopt different working modes;
Or the PWM signal wave setting circuit transmits a DO signal to the double-laser sub-control circuit, wherein the DO signal is a mode designated signal; the PWM signal input module is provided with a DO signal acquisition unit; the DO signal acquisition unit is used for designating different working modes of the first laser and the second laser by transmitting different DO signals to the central processing module;
the manual signal input module is a first priority circuit and is used for transmitting mode designating signals corresponding to all control ports to the central processing module; the PWM signal input module is a second priority circuit and is used for transmitting the acquired PWM signals, AP signals and DO signals to the central processing module; wherein the signal of the first priority circuit is transmitted before the signal of the second priority circuit;
the method comprises the following steps:
step S1: the central processing module determines the working modes to be adopted by the first laser and the second laser according to the mode designating signal;
step S2: the AP signal acquisition unit acquires an AP signal, and the central processing module determines the on/off of the first laser and the second laser according to the AP signal;
step S3: the method comprises the steps that a PWM signal acquisition unit acquires the duty ratio X of a PWM signal wave, and a central processing module respectively determines the light-emitting power of a first laser and the light-emitting power of a second laser according to the duty ratio X of the PWM signal wave;
Step S4: the central processing module transmits a PWM1 signal appointed by the light-emitting power of the first laser to the first laser control module; meanwhile, the central processing module transmits a PWM2 signal appointed by the light-emitting power of the second laser to the second laser control module;
step S5: the first laser and the second laser respectively finish laser emission according to PWM1 signals and PWM2 signals.
2. The control method of claim 1, wherein the operating mode includes a mode one in which the first laser and the second laser are operated simultaneously and the twin lasers are operated asynchronously.
3. The control method according to claim 2, wherein the operation modes further include a mode two, a mode three, and a mode four;
the second mode is that the first laser and the second laser work simultaneously, and the double lasers emit light synchronously;
the third mode is that the first laser works, and the second laser does not work;
and the fourth mode is that the first laser is not operated, and the second laser is operated.
4. The control method of claim 3, wherein the DO signal comprises a DI1 signal, a DI2 signal, a DI3 signal, and a DI4 signal;
Wherein the DI1 signal designates a dual laser in mode one; the DI2 signal specifies mode two; the DI3 signal specifies mode three; the DI4 signal specifies mode four.
5. A control method according to claim 2 or 3, wherein the duty ratio X of the PWM signal wave ranges from 0.0% to X max Wherein X is max Is the maximum value of the duty cycle X;
in the first laser, the percentage of the light-emitting power to the total laser power is set as A, which is simply referred to as a first laser power ratio A, wherein the percentage of the actual maximum light-emitting power to the total laser power is A max ＝60.0％；
In the second laser, the percentage of the light-emitting power to the total laser power is set as B, which is simply referred to as a second laser power ratio B, wherein the percentage of the actual maximum light-emitting power to the total laser power is B max ＝60.0％；
When x=y, the laser energy of the first laser or the second laser maintains both good stability and high power;
the double-laser sub-control circuit also comprises a storage module; the storage module is pre-provided with duty ratios X corresponding to different working modes, wherein the different duty ratios X correspond to different first laser power ratios A and second laser power ratios B; a PWM1 signal corresponding to the first laser power ratio A and a PWM2 signal corresponding to the second laser power ratio B are also preset.
6. The control method according to claim 5, wherein the calculation of the first laser power ratio a and the second laser power ratio B is as follows, under the condition that the twin laser adopts the first operation mode:
case one: when the duty ratio X is 0.0% to Y, the calculation formula of the power ratio A of the first laser isAt this time, the second laser power ratio b=0.0%;
and a second case: the first laser power ratio when the duty ratio X is from Y to 2YAt this time, the calculation formula of the second laser power ratio B is +.>
And a third case: duty ratio X is from 2Y toWhen the first laser power ratio A is calculated asAt this time, the second laser power ratio +.>
Case four: duty cycle X belongs toTo X max When the first laser power ratio A=60.0%, the calculation formula of the second laser power ratio B is +.>
7. The control method as set forth in claim 5, wherein when the dual lasers are in the second mode of operation, the first laser power ratio A is calculated by the formulaAt this time, the calculation formula of the second laser power ratio B is +.>
8. The control method according to claim 5, wherein when the twin laser adopts the third operation mode, the second laser is turned off, and the second laser power ratio B is maintained at 0.0%; the first laser power ratio A is calculated as follows:
Case one: the duty cycle X is from 0.0% toIn the case of the first laser power ratio A, the calculation formula is +.>
And a second case: duty cycleWhen the first laser power ratio a=60.0%;
and a third case: duty cycle X belongs toTo X max When the first laser power ratio a=60.0%.
9. The control method of claim 5, wherein the first laser is turned off and a first laser power ratio a remains at 0.0% when the twin laser is in operating mode four; the calculation process of the second laser power ratio B is as follows:
case one: the duty cycle X is from 0.0% toWhen the calculation formula of the second laser power ratio B isAnd a second case: duty cycle->When the second laser power ratio b=60.0%;
and a third case: duty cycle X belongs toTo X max When the second laser power ratio b=60.0%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310884160.6A CN116690005B (en) | 2023-07-18 | 2023-07-18 | Control method of double-laser sub-control circuit based on PWM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310884160.6A CN116690005B (en) | 2023-07-18 | 2023-07-18 | Control method of double-laser sub-control circuit based on PWM |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116690005A CN116690005A (en) | 2023-09-05 |
| CN116690005B true CN116690005B (en) | 2023-12-12 |
Family
ID=87835915
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310884160.6A Active CN116690005B (en) | 2023-07-18 | 2023-07-18 | Control method of double-laser sub-control circuit based on PWM |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116690005B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101919731A (en) * | 2009-06-09 | 2010-12-22 | 武汉奇致激光技术有限公司 | System and method for controlling laser efficiency of laser beautifying machine |
| CN105388959A (en) * | 2015-11-10 | 2016-03-09 | 上海金盾消防智能科技有限公司 | Circuit and method for controlling power of laser tube on basis of PWM signal |
| CN112582870A (en) * | 2020-12-01 | 2021-03-30 | 上海飞博激光科技有限公司 | High-power all-fiber pulse fiber laser system |
| CN112843492A (en) * | 2021-02-08 | 2021-05-28 | 深圳天基权健康科技集团股份有限公司 | Semiconductor laser treatment equipment and laser power adjusting method thereof |
| CN113721534A (en) * | 2021-11-03 | 2021-11-30 | 深圳市圭华智能科技有限公司 | Multi-channel multi-mode laser output control system |
| CN114488403A (en) * | 2020-12-21 | 2022-05-13 | 西安科锐盛创新科技有限公司 | Broadband adjustable attenuator control system based on optical fiber frequency transmission |
| CN114987491A (en) * | 2022-07-05 | 2022-09-02 | 成都中科微信息技术研究院有限公司 | Intelligent robot system supporting multimode driving control switching and control method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7403214B2 (en) * | 2006-02-21 | 2008-07-22 | Lexmark International, Inc. | Systems and methods for adjusting the dynamic range of a scanning laser beam |
-
2023
- 2023-07-18 CN CN202310884160.6A patent/CN116690005B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101919731A (en) * | 2009-06-09 | 2010-12-22 | 武汉奇致激光技术有限公司 | System and method for controlling laser efficiency of laser beautifying machine |
| CN105388959A (en) * | 2015-11-10 | 2016-03-09 | 上海金盾消防智能科技有限公司 | Circuit and method for controlling power of laser tube on basis of PWM signal |
| CN112582870A (en) * | 2020-12-01 | 2021-03-30 | 上海飞博激光科技有限公司 | High-power all-fiber pulse fiber laser system |
| CN114488403A (en) * | 2020-12-21 | 2022-05-13 | 西安科锐盛创新科技有限公司 | Broadband adjustable attenuator control system based on optical fiber frequency transmission |
| CN112843492A (en) * | 2021-02-08 | 2021-05-28 | 深圳天基权健康科技集团股份有限公司 | Semiconductor laser treatment equipment and laser power adjusting method thereof |
| CN113721534A (en) * | 2021-11-03 | 2021-11-30 | 深圳市圭华智能科技有限公司 | Multi-channel multi-mode laser output control system |
| CN114987491A (en) * | 2022-07-05 | 2022-09-02 | 成都中科微信息技术研究院有限公司 | Intelligent robot system supporting multimode driving control switching and control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116690005A (en) | 2023-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101938222B (en) | Power supply device and backlight system for supplying backlight to display device | |
| CN108270358A (en) | A kind of dual output Buck converters with coupling inductance | |
| CN116690005B (en) | Control method of double-laser sub-control circuit based on PWM | |
| CN101963801A (en) | Modularized intelligent welding power-supply system and on-line method for realizing same | |
| CN104247239A (en) | Controlling a switched mode power supply with maximised power efficiency | |
| CN207283505U (en) | APS amplifier power supply circuit and amplifier system | |
| CN103658933B (en) | Digital Variable Polarity multifunctional square wave pulse welding power supply | |
| CN201430714Y (en) | Led driver | |
| CN111064370A (en) | LLC and DAB mixed bidirectional DC-DC converter | |
| CN205610481U (en) | Type switching power supply that steps up is exported to single inductance no. 4 | |
| CN213399259U (en) | STM 32-based PWM output system | |
| CN101829834A (en) | Full-bridge inverting and single end forward inverting switching type arc welding power supply and control method thereof | |
| CN221079200U (en) | Sub-control circuit structure of double lasers | |
| CN203817590U (en) | Full-digital polarity-variable multifunctional square-wave pulse welding power supply | |
| CN204217185U (en) | A kind of flyback based on current feedback directly drives LED power circuit and television set | |
| TW200743295A (en) | A control method and apparatus of resonant type DC/DC converter with low power loss at standby | |
| CN108011601A (en) | A kind of E power-like amplifiers for the transmission of magnet coupled resonant type wireless electric energy | |
| CN209593257U (en) | Multipath voltage regulation output switch power source | |
| CN209677353U (en) | Heat the cigarette synchronous rectified boost circuit that do not burn | |
| CN202780200U (en) | Digital machine plasma cutter | |
| CN207399038U (en) | Double primary side isolated power supplies | |
| CN207117274U (en) | A kind of high-frequency impulse saves charge and discharge power supply | |
| CN202033464U (en) | Energy feedback type power supply module test device | |
| CN212969452U (en) | Input power supply of high-efficiency soft switch working mode | |
| CN215120577U (en) | Bidirectional bridge type resonant converter and power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |