Laser delayed marking control circuit and control method thereof

Abstract

The present invention discloses a laser delay marking control circuit, wherein the two ends of the marking control circuit are respectively connected to a power grid and a laser generator, and the marking control circuit comprises an analog signal adjustment circuit and a marking signal generating circuit; one end of the trigger circuit is connected to the power grid as a first input end; wherein the trigger circuit is connected to the first output end through a MOS tube circuit, and the MOS tube circuit comprises a first MOS tube and a second MOS tube, the source of the first MOS tube and the source of the second MOS tube are respectively connected to the trigger circuit, the gate of the first MOS tube and the gate of the second MOS tube are respectively connected to the first output end, and the first output end is connected to the input end of the marking signal generating circuit; the input end of the marking signal generating circuit generates a corresponding marking signal through a control voltage outputted from the first output end, and the marking signal generating circuit controls the laser generator to perform laser marking through the marking signal. The laser delay marking control circuit realizes accurate and flexible control of the laser marking action, and improves production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of laser marking, and in particular to a laser delayed marking control circuit and a control method thereof. Background Art

[0002] The working principle of the laser marking machine is mainly based on the local irradiation of the laser beam on the surface of the material to achieve permanent marking. First, the laser generator generates a high-energy continuous laser beam, and then the laser beam is focused on the specified position on the surface of the workpiece through the optical path system. Under the action of the laser beam, the surface material of the workpiece will undergo physical and chemical reactions such as melting, vaporization, and heating and discoloration, thereby leaving a permanent mark on the surface of the workpiece. In the laser marking process, voltage adjustment and time interval control are crucial to the marking effect. However, unstable voltage control will cause performance fluctuations of the laser marking device, thereby affecting the marking effect. This is because unstable voltage will affect the output power and stability of the laser generator, thereby causing performance fluctuations of the laser marking device. This fluctuation will manifest as fluctuations in the marking effect, such as instability in marking depth and marking speed. Therefore, ensuring voltage stability is the key to improving the performance of the laser marking device. Unstable marking interval time control will affect the clarity and uniformity of the marking effect. Voltage adjustment can change the energy density of the laser beam, thereby affecting the marking effect. Time interval control can adjust the irradiation time of the laser beam on the material surface, affecting the clarity and uniformity of the marking effect. In order to achieve high-quality marking effects, precise voltage adjustment and time interval control are required to ensure that the energy density and irradiation time of the laser beam are in the optimal state during the marking process. Summary of the invention

[0003] The embodiment of the present invention provides a laser delayed marking control circuit and a control method thereof, aiming to solve the problem of unstable operation of the marking process of the laser marking device existing in the prior art method.

[0004] In the first aspect, an embodiment of the present invention discloses a laser delayed marking control circuit, wherein two ends of the marking control circuit are respectively connected to a power grid and a laser generator, and the marking control circuit includes an analog signal adjustment circuit and a marking signal generation circuit; the analog signal adjustment circuit includes a trigger circuit and a MOS tube circuit; one end of the trigger circuit is connected to the power grid as a first input end; wherein: the trigger circuit is connected to the first output end of the analog signal adjustment circuit through the MOS tube circuit, the MOS tube circuit includes a first MOS tube and a second MOS tube, the source of the first MOS tube and the source of the second MOS tube are respectively connected to the trigger circuit, the gate of the first MOS tube and the gate of the second MOS tube are respectively connected to the first output end, and the gate of the first MOS tube is connected to the gate of the second MOS tube; the first output end is connected to the input end of the marking signal generation circuit; the input end of the marking signal generation circuit generates a corresponding marking signal through the control voltage output by the first output end, and the output end of the marking signal generation circuit controls the laser generator to perform laser marking through the marking signal.

[0005] Furthermore, the trigger circuit includes a trigger control circuit, the input end of the trigger control circuit is connected to the first input end, the trigger control circuit includes a first resistor, a second resistor and a trigger capacitor, one end of the first resistor is connected to the first input end, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to the trigger capacitor, and the output end of the trigger control circuit is connected to the trigger switch.

[0006] Furthermore, the trigger circuit also includes a delay control circuit, the input end of the delay control circuit is connected to the trigger capacitor through a trigger switch, and the output end of the delay control circuit is connected to the source of the first MOS tube and the second MOS tube through a voltage regulating switch.

[0007] Furthermore, the marking control circuit also includes an analog signal opening and closing circuit, which includes a second input terminal and a second output terminal, the second input terminal is connected to the first output terminal, and the second input terminal is connected to the second output terminal through a delay adjustment circuit.

[0008] Furthermore, the analog signal opening and closing circuit includes a delay adjustment circuit, the input end of the delay adjustment circuit is connected to the gate of the first MOS tube and the gate of the second MOS tube, and the output end of the delay adjustment circuit is connected to the input end of the marking signal generating circuit.

[0009] Furthermore, the delay adjustment circuit also includes a third resistor, one end of the third resistor is connected to the normally open control switch, and the other end of the third resistor is connected to the input end of the marking signal generating circuit.

[0010] Furthermore, the delay adjustment circuit also includes a fourth resistor and a fifth resistor, one end of the fourth resistor is connected to the normally closed control switch, the other end of the fourth resistor is connected to the input end of the marking signal generating circuit, one end of the fifth resistor is connected to the cycle control switch, the other end of the fifth resistor is connected to the input end of the marking signal generating circuit, and the third resistor is connected in parallel with the fourth resistor and the fifth resistor.

[0011] Furthermore, the third resistor, the fourth resistor and the fifth resistor have the same resistance value.

[0012] In the second aspect, an embodiment of the present invention also discloses a laser delayed marking control method, which is applied to the above-mentioned marking control circuit. The marking control method includes an analog signal adjustment circuit obtaining an analog signal of a signal source through a trigger circuit included therein, and delay-adjusting a control voltage corresponding to the analog signal through a delay control circuit; an analog signal opening and closing circuit obtaining the control voltage after delay adjustment, and sending an analog signal corresponding to the control voltage to a marking signal generating circuit; and the marking signal generating circuit controlling a laser generator according to the analog signal to perform laser marking.

[0013] Furthermore, before delaying the control voltage corresponding to the analog signal, the method includes determining whether the control voltage is greater than a preset voltage threshold, and if the control voltage is greater than the voltage threshold, delaying the control voltage.

[0014] The above-mentioned laser delay marking control circuit can conveniently increase or decrease the 12V voltage output time through the delay increase button and the delay decrease button, thereby realizing flexible marking time control. The entire circuit structure is simple, the operation is stable, and it can efficiently complete the laser marking task and improve production efficiency. The laser delay marking control circuit can be widely used in various laser marking scenarios, such as industrial production, product identification, etc., and has high practical value. Through its unique structure and function, the laser delay marking control circuit realizes accurate and flexible control of the laser marking action, improves production efficiency, and has high technical effect and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0016] Figure 1 An overall circuit diagram of a laser delay marking control circuit provided by an embodiment of the present invention;

[0017] Figure 2A control logic diagram of a laser delay marking control circuit provided by an embodiment of the present invention;

[0018] Figure 3 A schematic flow chart of a laser delayed marking control method provided in an embodiment of the present invention.

[0019] Figure Number:

[0020] 1. Analog signal adjustment circuit; 11. MOS tube circuit; 111. First MOS tube; 112. Second MOS tube; 12. Trigger circuit; 121. Trigger control circuit; 122. Delay control circuit; 123. Trigger capacitor; 124. First resistor; 125. Second resistor; 2. Marking signal generation circuit; 3. Analog signal opening and closing circuit; 31. Delay adjustment circuit; 32. Third resistor; 33. Fourth resistor; 34. Fifth resistor. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be understood that when used in this specification and the appended claims, the terms "include" and "comprises" indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0023] It should also be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0024] It should be further understood that the term "and / or" used in the present description and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0025] like Figure 1 as well as Figure 2As shown, the present embodiment provides a laser delay marking control circuit, wherein the two ends of the marking control circuit are respectively connected to the power grid and the laser generator, and the marking control circuit comprises an analog signal adjustment circuit 1 and a marking signal generation circuit 2; the analog signal adjustment circuit 1 comprises a trigger circuit 12 and a MOS tube circuit 11; one end of the trigger circuit 12 is connected to the power grid as a first input end; wherein: the trigger circuit 12 is connected to the first output end of the analog signal adjustment circuit 1 through the MOS tube circuit 11, and the MOS tube circuit 11 comprises a first MOS tube 111 and a second MOS tube 112, The source of the first MOS tube 111 and the source of the second MOS tube 112 are respectively connected to the trigger circuit 12, the gate of the first MOS tube 111 and the gate of the second MOS tube 112 are respectively connected to the first output end, and the gate of the first MOS tube 111 is connected to the gate of the second MOS tube 112; the first output end is connected to the input end of the marking signal generating circuit 2; the input end of the marking signal generating circuit 2 generates a corresponding marking signal through the control voltage output by the first output end, and the output end of the marking signal generating circuit 2 controls the laser generator to perform laser marking through the marking signal.

[0026] The two ends of the marking control circuit are respectively connected to the power grid and the laser generator to provide power and realize the control function. The marking control circuit includes an analog signal adjustment circuit 1 and a marking signal generation circuit 2. Among them, the analog signal adjustment circuit 1 plays the role of converting pulse signals, controlling voltage output and delay control; the marking signal generation circuit 2 is responsible for generating a marking signal and controlling the laser generator to perform laser marking. The analog signal adjustment circuit 1 includes a trigger circuit 12 and a MOS tube circuit 11. One end of the trigger circuit 12 is connected to the power grid as a first input end, and the other end is connected to the first output end through the MOS tube circuit 11. The MOS tube circuit 11 includes a first MOS tube 111 and a second MOS tube 112. The sources of the first MOS tube 111 and the second MOS tube 112 are respectively connected to the trigger circuit 12, and the gate is connected to the first output end. The gate of the first MOS tube 111 is connected to the gate of the second MOS tube 112. The first output end is connected to the input end of the marking signal generation circuit 2. The input end of the marking signal generation circuit 2 generates a corresponding marking signal through the control voltage output from the first output end. The output end of the marking signal generating circuit 2 controls the laser generator to perform laser marking via the marking signal.

[0027] In the actual usage scenario, the signal source receives the PASS pulse signal of the front-end test machine through a wired connection (no PASS pulse signal is sent to the signal source). The signal source receives the PASS pulse signal sent by the front-end test machine through a wired connection. If the test fails, no pulse signal will be sent to the signal source. After the analog signal conditioning circuit 1 triggers the pulse signal through the wired connection signal source, the program conversion button can be set by connecting the microcomputer control program to set the program conversion button to set the program conversion, and the pulse signal is converted into a 12V voltage output. The analog signal conditioning circuit 1 is connected to the signal source through a wired connection and receives the trigger pulse signal. Then, the microcomputer control program performs program conversion by setting the program conversion button to convert the received pulse signal into a 12V voltage output. The delay increase button is responsible for increasing the delay time of the 12V output voltage, and the delay reduction button is responsible for shortening the 12V output voltage time. The functions of the delay increase button and the delay reduction button. The delay increase button is used to increase the delay time of the 12V output voltage, and the delay reduction button is used to reduce the delay time of the 12V output voltage. The analog signal opening and closing circuit 3 is connected to the analog signal conditioning circuit 1 through a wire, receives the 12V voltage output by the analog signal conditioning circuit 1, and then performs the corresponding work. In the whole process, the analog signal conditioning circuit 1 mainly plays the role of converting the pulse signal into a 12V voltage output, and when necessary, extends and shortens the output voltage.

[0028] In summary, the pulse signal is converted into a 12V voltage output through the analog signal conditioning circuit 1, and the output time is accurately adjusted using the delay control function, so that the marking signal can accurately control the marking action of the laser generator. Through the delay increase button and the delay decrease button, the 12V voltage output time can be easily increased or decreased, thereby realizing flexible marking time control. The entire circuit structure is simple, the operation is stable, and it can efficiently complete the laser marking task and improve production efficiency. The laser delay marking control circuit can be widely used in various laser marking scenarios, such as industrial production, product identification, etc., and has high practical value. Through its unique structure and function, the laser delay marking control circuit realizes accurate and flexible control of the laser marking action, improves production efficiency, and has high technical effects and application value.

[0029] Furthermore, the trigger circuit 12 includes a trigger control circuit, the input end of the trigger control circuit is connected to the first input end, the trigger control circuit includes a first resistor 124, a second resistor 125 and a trigger capacitor 123, one end of the first resistor 124 is connected to the first input end, the other end of the first resistor 124 is connected to one end of the second resistor 125, the other end of the second resistor 125 is connected to the trigger capacitor 123, and the output end of the trigger control circuit is connected to the trigger switch.

[0030] Specifically, the trigger control circuit is an important part of the trigger circuit 12, which is mainly composed of a first resistor 124, a second resistor 125 and a trigger capacitor 123. One end of the first resistor 124 is connected to the first input end, and the other end is connected to one end of the second resistor 125. The other end of the second resistor 125 is connected to the trigger capacitor 123. The output end of the trigger control circuit is connected to the trigger switch. When the trigger signal is input to the trigger control circuit, the input signal is converted into a voltage suitable for charging the trigger capacitor 123 through the voltage divider circuit composed of the first resistor 124 and the second resistor 125. During the charging process of the trigger capacitor 123, the voltage gradually increases. When the voltage reaches a certain value, the trigger switch is triggered, thereby starting the entire laser delay marking control circuit. This design method can achieve accurate control of the trigger signal, thereby achieving accurate control of the laser marking time. By accurately controlling the trigger signal, the accuracy and stability of the laser marking action can be ensured, and the production efficiency and product quality can be improved. The first input end of the analog signal conditioning circuit 1 is connected to the power grid for receiving the PASS pulse signal sent by the front-end tester. The analog signal conditioning circuit 1 converts the received pulse signal into a 12V voltage output through the MOS tube circuit 11. The analog signal conditioning circuit 1 has a delay control function, and the 12V voltage output time can be adjusted through the delay increase button and the delay reduction button. Each time the delay increase button is pressed, the 12V voltage output time increases by 0.1 seconds; each time the delay reduction button is pressed, the 12V voltage output time decreases by 0.1 seconds. The input end of the marking signal generating circuit 2 generates a corresponding marking signal through the control voltage output by the first output end of the analog signal conditioning circuit 1. The output end of the marking signal generating circuit 2 controls the laser generator to perform laser marking through the marking signal. In general, the function of this laser delay marking control circuit is to receive a pulse signal, convert it into a 12V voltage output, and perform delay control, and finally generate a marking signal to control the laser generator to perform laser marking. This circuit has a wide range of applications in the field of laser marking and can achieve precise marking control functions.

[0031] Furthermore, the trigger circuit 12 also includes a delay control circuit 122, the input end of the delay control circuit 122 is connected to the trigger capacitor 123 through a trigger switch, and the output end of the delay control circuit 122 is connected to the source of the first MOS tube 111 and the second MOS tube 112 through a voltage regulating switch.

[0032] Furthermore, the marking control circuit also includes an analog signal opening and closing circuit 3, which includes a second input terminal and a second output terminal, the second input terminal is connected to the first output terminal, and the second input terminal is connected to the second output terminal through a delay adjustment circuit 31.

[0033] Furthermore, the analog signal opening and closing circuit 3 includes a delay adjustment circuit 31, the input end of the delay adjustment circuit 31 is connected to the gate of the first MOS tube 111 and the gate of the second MOS tube 112, and the output end of the delay adjustment circuit 31 is connected to the input end of the marking signal generating circuit 2.

[0034] Specifically, the delay control circuit 122 is mainly composed of a trigger switch, a trigger capacitor 123 and a voltage regulating switch. The trigger switch is responsible for starting the circuit, and when the trigger switch receives a signal, the circuit starts working. The trigger capacitor 123 is used to store the trigger signal and transmit the signal to the input end of the delay control circuit 122. The voltage regulating switch is responsible for adjusting and controlling the source voltage of the first MOS tube 111 and the second MOS tube 112, so as to achieve precise control of the laser marking time. The delay adjustment circuit 31 is mainly composed of an input end, an output end and a delay adjustment switch. The input end is connected to the gate of the first MOS tube 111 and the gate of the second MOS tube 112, and receives a signal from the trigger circuit 12. The output end is connected to the input end of the marking signal generating circuit 2, and the adjusted signal is transmitted to the marking signal generating circuit 2. The delay adjustment switch is responsible for adjusting the delay time of the marking signal. When the delay adjustment switch receives a signal, the delay adjustment circuit 31 starts working, delays the input signal, and transmits the adjusted signal to the marking signal generating circuit 2. In this way, the laser marking time can be precisely controlled. Through the synergy of the above two circuits, the laser marking time can be precisely controlled, thereby improving production efficiency and product quality. This design method cleverly utilizes the characteristics of circuit components to achieve precise control of laser marking time, and has high practical value.

[0035] The marking control circuit can also be provided with functional modules including a time information storage module. The signal ports of the time information storage module are respectively connected to the trigger control terminal and the delay control terminal to realize the storage and adjustment of time information in the circuit. The time information storage module receives the voltage signal sent by the trigger control terminal and the delay control terminal, and converts it into storable voltage-controlled time information. Such a design enables the circuit to store and adjust time information, further improving the marking accuracy and stability. By adding the time information storage module, the laser delay marking control circuit can realize the storage and adjustment of time information, thereby meeting various complex marking requirements.

[0036] Furthermore, the delay adjustment circuit 31 also includes a third resistor 32 , one end of the third resistor 32 is connected to the normally open control switch, and the other end of the third resistor 32 is connected to the input end of the marking signal generating circuit 2 .

[0037] Furthermore, the delay adjustment circuit 31 also includes a fourth resistor 33 and a fifth resistor 34, one end of the fourth resistor 33 is connected to the normally closed control switch, the other end of the fourth resistor 33 is connected to the input end of the marking signal generating circuit 2, one end of the fifth resistor 34 is connected to the cycle control switch, the other end of the fifth resistor 34 is connected to the input end of the marking signal generating circuit 2, and the third resistor 32 is connected in parallel with the fourth resistor 33 and the fifth resistor 34.

[0038] Furthermore, the third resistor 32 , the fourth resistor 33 and the fifth resistor 34 have the same resistance value.

[0039] Second, as Figure 3 As shown, an embodiment of the present invention further discloses a laser delayed marking control method, which is applied to the above-mentioned marking control circuit. The marking control method includes: step S110, the analog signal adjustment circuit 1 obtains the analog signal of the source through the trigger circuit 12 included therein, and delays the control voltage corresponding to the analog signal through the delay control circuit 122; S120, the analog signal opening and closing circuit 3 obtains the control voltage after delay adjustment, and sends the analog signal corresponding to the control voltage to the marking signal generating circuit 2; S130, the marking signal generating circuit 2 controls the laser generator according to the analog signal to perform laser marking.

[0040] Furthermore, before delaying the control voltage corresponding to the analog signal, the method includes determining whether the control voltage is greater than a preset voltage threshold, and if the control voltage is greater than the voltage threshold, delaying the control voltage.

[0041] Specifically, the laser delayed marking control method first obtains the analog signal of the source through the analog signal adjustment circuit 1, and delays the control voltage corresponding to the analog signal. Such a design enables the circuit to adjust the analog signal and improve the marking accuracy and stability. The analog signal opening and closing circuit 3 obtains the control voltage after delay adjustment, and sends the analog signal corresponding to the control voltage to the marking signal generation circuit 2. Such a design enables the circuit to realize the opening and closing control of the analog signal, further improving the marking accuracy and stability. The marking signal generation circuit 2 controls the laser generator according to the analog signal to perform laser marking. Such a design enables the circuit to generate a marking signal, thereby completing the laser marking process. Before the control voltage corresponding to the analog signal is delayed, the method also includes determining whether the control voltage is greater than a preset voltage threshold. If the control voltage is greater than the voltage threshold, the control voltage is delayed. Such a design enables the circuit to realize the threshold judgment of the control voltage, further improving the marking accuracy and stability. In summary, this laser delay marking control method realizes the adjustment of analog signals, opening and closing control, and generation of marking signals through the design of various steps, thereby completing the laser marking process. At the same time, through the threshold judgment and delay adjustment of the control voltage, this method improves the marking accuracy and stability to a certain extent.

[0042] The invention discloses a laser delayed marking control circuit and a control method thereof. Two ends of the marking control circuit are respectively connected to a power grid and a laser generator. The marking control circuit comprises: an analog signal adjustment circuit 1 and a marking signal generating circuit 2; the analog signal adjustment circuit 1 comprises a trigger circuit 12 and a MOS tube circuit 11; one end of the trigger circuit 12 is connected to the power grid as a first input end; wherein: the trigger circuit 12 is connected to a first output end through the MOS tube circuit 11, the MOS tube circuit 11 comprises a first MOS tube 111 and a second MOS tube 112, the source of the first MOS tube 111 and the source of the second MOS tube 112 are respectively connected to the trigger circuit 12, the gate of the first MOS tube 111 and the gate of the second MOS tube 112 are respectively connected to the first output end, and the gate of the first MOS tube 111 is connected to the gate of the second MOS tube 112; the first output end is connected to the input end of the marking signal generating circuit 2; the input end of the marking signal generating circuit 2 generates a corresponding marking signal through a control voltage output from the first output end, and the output end of the marking signal generating circuit 2 controls the laser generator to perform laser marking through the marking signal.

[0043] In summary, the main functions of the analog signal conditioning circuit 1 in the whole process include converting the pulse signal into a 12V voltage output, and controlling the output voltage in time when necessary. When the marking signal generating circuit 2 is not enough or too long in the dotting action, it can be adjusted by the delay increase button and the delay reduction button in the analog signal conditioning circuit 1. When the marking signal generating circuit 2 is performing the dotting action, if the time is not enough or too long, it can be adjusted by the delay increase button and the delay reduction button in the analog signal conditioning circuit 1. If there is no analog signal conditioning circuit 1 control device, the entire marking action cannot be completed in a controllable manner. The voltage output end and the 12V output voltage are provided by the 12V voltage power supply end of the external 12V power supply, and a trigger is formed after receiving the pulse signal, and the 12V power provided by the 12V voltage power supply end is converted to the voltage output end through the dual MOS tube. The 12V output voltage is provided by the external 12V power supply, and the analog signal conditioning circuit 1 is triggered after receiving the pulse signal, and the 12V voltage is converted through the dual MOS tube and then output to the voltage output end. The control program is a programmable microcomputer chip of a programmable microcomputer chip, which is stored in the programmable microcomputer chip through the setting program conversion button, delay increase button, and delay reduction button. The control program is stored in the programmable microcomputer chip and adjusted by setting the program conversion button, delay increase button, and delay reduction button. The 12V voltage at the voltage output end does not change high or low. The entire structure only plays a role in controlling the length of the 12V voltage output time at the voltage output end. The length of the output 12V voltage time is achieved by adjusting the delay increase button and the delay reduction button. Each press of the delay increase button increases the 12V voltage output time by 0.1 seconds, and each press of the delay reduction button reduces the 12V voltage output time by 0.1 seconds. The addition and subtraction time programs are stored in the programmable microcomputer chip of the programmable microcomputer chip. The 12V voltage output at the voltage output end does not change high or low, and mainly plays a role in controlling the length of the output time. The delay increase button and the delay decrease button are used to adjust the 12V voltage output time, and each press increases or decreases by 0.1 seconds. The addition and subtraction time programs are stored in the programmable microcomputer chip. The marking signal generation circuit 2 is connected to the analog signal opening and closing circuit 3 opening and closing output terminal through a wire to start the action. The PWM and GND of the semiconductor laser are in a normally closed state. When the signal of the analog signal opening and closing circuit 3 disconnects the PWM and GND normally closed states of the marking signal generation circuit 2, the laser starts working and emits a laser beam. The length of the dotting time is controlled by the delay time set by the programmable microcomputer chip. Each time the delay increase button is pressed, the dotting time will increase by 0.1 seconds; each time the delay reduction button is pressed, the dotting time will decrease by 0.1 seconds. These addition and subtraction time programs are stored in the programmable microcomputer chip for easy operation and control.

[0044] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A laser delayed marking control circuit, wherein the two ends of the marking control circuit are respectively connected to a power grid and a laser generator, and characterized in that: The marking control circuit comprises: an analog signal adjustment circuit and a marking signal generation circuit; The analog signal conditioning circuit includes a trigger circuit and a MOS tube circuit; one end of the trigger circuit is connected to the power grid as a first input end; Wherein: the trigger circuit is connected to the first output end of the analog signal adjustment circuit through the MOS tube circuit, the MOS tube circuit includes a first MOS tube and a second MOS tube, the source of the first MOS tube and the source of the second MOS tube are respectively connected to the trigger circuit, the gate of the first MOS tube and the gate of the second MOS tube are respectively connected to the first output end, and the gate of the first MOS tube is connected to the gate of the second MOS tube; The first output terminal is connected to the input terminal of the marking signal generating circuit; The input end of the marking signal generating circuit generates a corresponding marking signal through the control voltage output by the first output end, and the output end of the marking signal generating circuit controls the laser generator to perform laser marking through the marking signal; The trigger circuit includes a trigger control circuit, the trigger control circuit includes a first resistor, a second resistor and a trigger capacitor, one end of the first resistor is connected to the first input end, the other end of the first resistor is connected to one end of the second resistor, the other end of the second resistor is connected to the trigger capacitor, and the output end of the trigger control circuit is connected to the trigger switch; The trigger circuit also includes a delay control circuit, the input end of the delay control circuit is connected to the trigger capacitor through the trigger switch, and the output end of the delay control circuit is connected to the source of the first MOS tube and the second MOS tube through a voltage regulating switch.

2. The laser delayed marking control circuit according to claim 1, characterized in that: The marking control circuit also includes an analog signal opening and closing circuit, which includes a second input terminal and a second output terminal, wherein the second input terminal is connected to the first output terminal, and the second input terminal is connected to the second output terminal via a delay adjustment circuit.

3. The laser delayed marking control circuit according to claim 2, characterized in that: The analog signal opening and closing circuit includes a delay adjustment circuit, the input end of the delay adjustment circuit is connected to the gate of the first MOS tube and the gate of the second MOS tube, and the output end of the delay adjustment circuit is connected to the input end of the marking signal generating circuit.

4. The laser delayed marking control circuit according to claim 3, characterized in that: The delay adjustment circuit also includes a third resistor, one end of the third resistor is connected to the normally open control switch, and the other end of the third resistor is connected to the input end of the marking signal generating circuit.

5. The laser delayed marking control circuit according to claim 4, characterized in that: The delay adjustment circuit also includes a fourth resistor and a fifth resistor, one end of the fourth resistor is connected to the normally closed control switch, and the other end of the fourth resistor is connected to the input end of the marking signal generating circuit, one end of the fifth resistor is connected to the cycle control switch, and the other end of the fifth resistor is connected to the input end of the marking signal generating circuit, and the third resistor is connected in parallel with the fourth resistor and the fifth resistor.

6. The laser delayed marking control circuit according to claim 5, characterized in that: The third resistor, the fourth resistor and the fifth resistor have the same resistance value.

7. A laser delayed marking control method, characterized in that: The marking control method uses the laser delayed marking control circuit according to any one of claims 1 to 6, and the marking control method includes: The analog signal adjustment circuit obtains the analog signal of the signal source through the trigger circuit included therein, and adjusts the control voltage corresponding to the analog signal by delay through the delay control circuit; The analog signal opening and closing circuit obtains the control voltage after delay adjustment, and sends the analog signal corresponding to the control voltage to the marking signal generating circuit; The marking signal generating circuit controls the laser generator according to the analog signal to perform laser marking.

8. The laser delayed marking control method according to claim 7, characterized in that: Before delaying and adjusting the control voltage corresponding to the analog signal, the method includes: It is determined whether the control voltage is greater than a preset voltage threshold, and if the control voltage is greater than the voltage threshold, a delay adjustment is performed on the control voltage.

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