Safe laser power supply circuit and laser

Abstract

The utility model discloses a safety laser power supply circuit and a laser, and relates to the technical field of continuous fiber laser electrical control system safety, the safety laser power supply circuit comprises a boost module and a driving module, the driving module is respectively connected with the boost module and the laser, the boost module is also connected with a low-voltage power supply, and the low-voltage power supply is connected with the laser. The boosting module is used for converting a power supply voltage signal into a first voltage signal required by the laser when receiving the power supply voltage signal output by the low-voltage power supply and transmitting the first voltage signal to the driving module, and the driving module drives the laser based on the first voltage signal when receiving the first voltage signal. Compared with the prior art that a 220V power supply is used and supplies power to the laser after voltage reduction, the low-voltage power supply is used and supplies power to the laser after voltage boosting, the low-voltage power supply is safe voltage, use safety is guaranteed, the low-voltage power supply is a low-power power supply, and the cost of the laser is reduced through the low-power power supply.

Description

Technical Field

[0001] This application relates to the technical field of the electrical control system safety of continuous fiber lasers, and particularly relates to a safe laser power supply circuit and a laser. Background Art

[0002] Currently, the QCW (Quasi-Continuous Wave Laser) thulium-doped fiber laser is a laser technology that combines the characteristics of continuous wave lasers and pulsed lasers in some applications. QCW thulium-doped fiber laser welding can avoid the influence of metal plume on the light absorption rate of materials, improve the stability of the welding process, and its intermittent light output mode helps to reduce the formation of metal vapor and plasma mixed gas, and reduce the occurrence of defects such as spatter, explosion points, and pits.

[0003] However, the existing QCW thulium-doped fiber lasers generally use AC220V power supply. The power supply used by QCW thulium-doped fiber lasers has relatively low safety, and the AC220V power supply is generally a high-power power supply. QCW thulium-doped fiber lasers usually do not need a high-power power supply, resulting in waste.

[0004] The above content is only used to assist in understanding the technical solution of the present utility model, and does not represent an admission that the above content is prior art. Summary of the Utility Model

[0005] The main purpose of this application is to provide a safe laser power supply circuit and a laser, aiming to solve the technical problems of relatively low safety of the power supply of QCW thulium-doped fiber lasers in the prior art and waste caused by using high-power power supplies for QCW thulium-doped fiber lasers.

[0006] To achieve the above object, the present utility model proposes a safe laser power supply circuit, and the safe laser power supply circuit includes: a boost module and a drive module;

[0007] The drive module is respectively connected to the boost module and the laser, and the boost module is also connected to a low-voltage power supply;

[0008] The boost module is configured to convert the power voltage signal output by the low-voltage power supply into a first voltage signal required by the laser when receiving the power voltage signal, and transmit the first voltage signal to the drive module;

[0009] The drive module is configured to drive the laser based on the first voltage signal when receiving the first voltage signal.

[0010] Optionally, the safe laser power supply circuit further includes: an air-cooled radiator;

[0011] The air-cooled radiator is connected to the low-voltage power supply;

[0012] The air-cooled radiator is used for heat dissipation when receiving the power voltage signal output by the low-voltage power supply.

[0013] Optionally, the safety laser power supply circuit further includes: a safety module;

[0014] The safety module is respectively connected to the low-voltage power supply and the boost module;

[0015] The safety module is used for detecting the power voltage signal when receiving the power voltage signal output by the low-voltage power supply, and transmitting the power voltage signal to the boost module when the power voltage is within a preset safety threshold.

[0016] Optionally, the safety laser power supply circuit further includes: a control chip;

[0017] The ground pin of the control chip is connected to the safety module, the output pin of the control chip is connected to the boost module, and the power supply pin of the control chip is respectively connected to the safety module and the boost module.

[0018] Optionally, the boost module includes: a MOS transistor, a first capacitor, a second capacitor, a zener diode, and an inductor;

[0019] The gate of the MOS transistor is connected to the output pin of the control chip, the drain of the MOS transistor is respectively connected to the second end of the inductor and the anode of the zener diode, the source of the MOS transistor is grounded, the first end of the first capacitor is respectively connected to the safety module and the first end of the inductor, the second ends of the first capacitor and the second capacitor are grounded, and the first end of the second capacitor is respectively connected to the cathode of the zener diode and the drive module.

[0020] Optionally, the safety laser power supply circuit further includes: a voltage sampling module;

[0021] The voltage sampling module is respectively connected to the voltage sampling pin of the control chip and the boost module;

[0022] The voltage sampling module is used for receiving the first voltage signal and transmitting the sampled first voltage signal to the control chip, and the control chip controls the output by analyzing the first voltage signal.

[0023] Optionally, the voltage sampling module includes: a first resistor;

[0024] The first resistor is respectively connected to the boost module and the voltage sampling pin of the control chip.

[0025] Optionally, the safety laser power supply circuit further includes: an overvoltage protection module;

[0026] The overvoltage protection module is respectively connected to the overvoltage protection pin of the control chip and the boost module;

[0027] The overvoltage protection module is configured to receive a first voltage signal, and when the amplitude of the first voltage signal exceeds a preset overvoltage threshold, transmit an overvoltage signal to the control chip;

[0028] The control chip is configured to stop outputting a switching signal to the boost module when receiving the overvoltage signal.

[0029] Optionally, the overvoltage protection module includes: a second resistor;

[0030] The second resistor is respectively connected to the boost module and the overvoltage protection pin of the control chip.

[0031] In addition, to achieve the above object, the present invention further provides a laser, and the laser includes the safety laser power supply circuit as described above.

[0032] One or more technical solutions proposed in this application have at least the following effects:

[0033] The present invention provides a safety laser power supply circuit and a laser. The safety laser power supply circuit includes: a boost module and a drive module; the drive module is respectively connected to the boost module and the laser, and the boost module is further connected to a low-voltage power supply; the boost module is configured to convert the power supply voltage signal output by the low-voltage power supply into a first voltage signal required by the laser when receiving the power supply voltage signal, and transmit the first voltage signal to the drive module; the drive module is configured to drive the laser based on the first voltage signal when receiving the first voltage signal. Since when the present invention detects the access of the low-voltage power supply, the low voltage is boosted to the voltage required by the laser through the boost module, and the low-voltage power supply is a safety voltage, which ensures the safety of use. The low-voltage power supply is a small-power power supply, and the small-power power supply reduces the cost of the laser. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 It is a schematic structural diagram of the first embodiment of the safety laser power supply circuit proposed in the embodiment of the present application;

[0036] Figure 2 Schematic diagram of the structure of the second embodiment of the safety laser power supply circuit proposed in the embodiments of the present application;

[0037] Figure 3 Circuit schematic diagram of the safety laser power supply circuit in the second embodiment of the safety laser power supply circuit proposed in the embodiments of the present application.

[0038] Explanation of the reference numerals in the drawings:

[0039] Label Name Label Name 1 Boost module 2、H Driver module 3. Fan Air-cooled radiator 4、K Safety module 5、U Control chip 6 Voltage sampling module 7 Overvoltage protection module Q MOS transistor C1 First capacitor C2 Second capacitor R1 First resistor R2 Second resistor L Inductor D Zener diode

[0040] The realization of the purpose, functional characteristics and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0041] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application, and are not used to limit the present application.

[0042] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0044] In addition, the descriptions involving "first", "second", etc. in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0045] The main solution of the embodiments of the present application is that when the laser detects the access of the low-voltage power supply, the boost module boosts the low voltage to the voltage required by the laser, and the laser is cooled by the air-cooled radiator.

[0046] Since the existing technology uses an AC220V power supply to supply power to the laser after step-down, 220V is not a safe voltage and is usually not applicable to high-power power lasers. A water-cooling system is used to dissipate heat from the laser. The water-cooling system is relatively complex to use and has relatively strict environmental requirements. The mechanical design is complex, the operating conditions are demanding, and the cost is high.

[0047] The present application provides a solution. When a low-voltage power supply is detected to be connected, a boost module is used to boost the low voltage to the voltage required by the laser. The low-voltage power supply supplies power to an air-cooled radiator, and the air-cooled radiator dissipates heat from the laser. Therefore, compared with the existing technical means, the low-voltage power supply of the present application is a safe voltage, ensuring the safety of use. The low-voltage power supply is a low-power power supply, and the low-power power supply reduces the cost of the laser. The air-cooled radiator is easier to install than water-cooling, reducing the cost.

[0048] Based on this, an embodiment of the present application provides a safe laser power supply circuit.

[0049] Refer to Figure 1 , Figure 1 which is a schematic structural diagram of the first embodiment of the safe laser power supply circuit proposed in the embodiment of the present application.

[0050] Considering that the AC220V power supply is not a safe voltage, and in order to improve the safety of the circuit, based on the first embodiment, as Figure 1 shown, the safe laser power supply circuit described in this embodiment includes: a boost module 1 and a drive module 2;

[0051] The drive module 2 is respectively connected to the boost module 1 and the laser, and the boost module 1 is also connected to a low-voltage power supply;

[0052] The boost module 1 is configured to convert the power voltage signal output by the low-voltage power supply into a first voltage signal required by the laser when receiving the power voltage signal, and transmit the first voltage signal to the drive module 2;

[0053] The drive module 2 is configured to drive the laser based on the first voltage signal when receiving the first voltage signal.

[0054] It should be noted that the safe laser power supply circuit provided in this embodiment can be applied to any scenario where a laser is used. The low-voltage power supply can be a power supply with an output voltage value, such as DC24V, DC48V, etc., which are DC voltage sources. The voltage of the low-voltage power supply is a safe voltage. The safe voltage is the upper limit value of the voltage specified to prevent the human body from being electrocuted when contacting a live body. For example: 24V, 48V, etc. The voltage value of the power supply voltage signal is equal to the voltage value of the low-voltage power supply. The laser is a device capable of generating laser light, such as a fiber laser, a pulsed laser, etc. Its core principle is based on stimulated emission to achieve optical amplification. Stimulated emission refers to the process in which atoms, molecules or ions in an excited state, under the action of an external photon, transition from a high energy level to a low energy level and emit photons with the same frequency, phase, polarization state and propagation direction as the external photon. This process is a necessary condition for the generation of laser light. The main components of the laser are pump sources, such as 150W / 793nm pump tubes, 27W / 976nm pump tubes, etc. Among them, 150W / 27W is the rated power of the pump tube, and 793nm / 976nm is the wavelength of the pump tube. Pumping is a key process in the laser, which involves inputting external energy (such as electrical energy, light energy, chemical energy, etc.) into the laser medium to stimulate it to generate laser light.

[0055] It can be understood that the first voltage signal is the voltage required by the laser, such as: 137V, 180V, etc. DC voltages. The boost module 1 can be a DC boost circuit, a transformer boost circuit, or an inductor booster circuit. This embodiment does not limit this. The drive module 2 converts the first voltage signal transmitted from the boost module 1 into a signal that can drive the laser to turn on or off, such as 135V / 40A linear drive, 180V / 30A linear drive. The drive module 2 can be a direct drive circuit or an isolated drive circuit. This embodiment does not limit this.

[0056] In this embodiment, when the boost module 1 detects the input of the power supply voltage signal of the low-voltage power supply, it converts the power supply voltage signal into the first voltage signal required by the laser and transmits the first voltage signal to the drive module 2. When the drive module 2 receives the first voltage signal, it converts the first voltage signal transmitted from the boost module 1 into a signal that can drive the laser to turn on or off, and drives the laser based on the on or off signal. The low-voltage power supply is a safe voltage, thereby improving the safety of the circuit.

[0057] Refer to Figure 2 , Figure 2 which is a schematic structural diagram of the second embodiment of the safe laser power supply circuit proposed in the embodiment of the present application.

[0058] Considering that the mechanical design of water-cooled heat dissipation is complex, and in order to reduce the usage cost, based on the second embodiment, as Figure 2 shown, the safety laser power supply circuit in this embodiment further includes: an air-cooled radiator 3;

[0059] The air-cooled radiator 3 is connected to the low-voltage power supply;

[0060] The air-cooled radiator 3 is used to dissipate heat when receiving the power voltage signal output by the low-voltage power supply.

[0061] It should be noted that the function of the air-cooled radiator 3 is to take away the heat from the laser through heat dissipation devices such as fans, so as to ensure the stable operation of the laser. The heat dissipation power of the air-cooled radiator 3 in this embodiment is consistent with the power of the laser.

[0062] In specific implementation, when the air-cooled radiator 3 detects the power voltage signal output by the low-voltage power supply, it dissipates heat from the laser. When the air-cooled radiator 3 detects that the average temperature of the laser is lower than 25°C, the air-cooled radiator 3 operates at half power. When the air-cooled radiator 3 detects that the average temperature of the laser is higher than 25°C, the air-cooled radiator 3 operates at full power.

[0063] Furthermore, considering whether the input power voltage meets the safety voltage, and in order to protect the circuit, the safety laser power supply circuit further includes: a safety module 4;

[0064] The safety module 4 is respectively connected to the low-voltage power supply and the boost module 1;

[0065] The safety module 4 is used to detect the power voltage signal when receiving the power voltage signal output by the low-voltage power supply, and transmit the power voltage signal to the boost module 1 when the power voltage is within the preset safety threshold.

[0066] It should be noted that the preset safety threshold is the safety voltage, and the safety voltage is the upper limit of the voltage specified to prevent the human body from being shocked when contacting the live body, such as 24V, 48V, etc.

[0067] It can be understood that the safety module 4 refers to a circuit design that complies with safety regulations and standards. When the safety module 4 detects that the power supply voltage of the low-voltage power supply is within the preset safety threshold, the relay coil in the safety module 4 is energized, and the normally open contact of the relay closes, conducting the connection between the low-voltage power supply and the boost module. The safety module 4 also includes a fuse. When the input current of the low-voltage power supply exceeds the preset current threshold, the fuse blows, thereby ensuring the safety and reliability of the circuit during operation. The preset current threshold is the safety current, and the safety current refers to the current value at which, in order to ensure the safe operation of electrical equipment and lines, when the wire or cable continuously passes through the load current, the line temperature does not exceed the maximum allowable temperature (usually about 70 °C). The safety module 4 is also used for lightning protection and surge voltage resistance.

[0068] In a specific implementation, when the safety module 4 receives the power supply voltage signal output by the low-voltage power supply, it detects the power supply voltage signal. When the power supply voltage is within the preset safety threshold, the relay coil in the safety module 4 is energized, the normally open contact of the relay closes, conducting the connection between the low-voltage power supply and the boost module, and the power supply voltage signal is transmitted to the boost module 1.

[0069] Furthermore, considering the control of the boost module, the safety laser power supply circuit further includes: a control chip 5;

[0070] The ground pin of the control chip 5 is connected to the safety module 4, the output pin of the control chip 5 is connected to the boost module 1, and the power supply pin of the control chip 5 is respectively connected to the safety module 4 and the boost module 1.

[0071] It can be understood that the control chip 5 can be an MCU (Microcontroller Unit), or a DSP (Digital Signal Processor), or an FPGA (Field Programmable Gate Array). This embodiment does not limit this.

[0072] It should be noted that the power supply pin of the control chip 5 is connected to the power supply, the ground pin of the control chip 5 is used for grounding, the output pin of the control chip 5 is connected to the gate of the MOS tube, and the control chip 5 also includes a fixed-frequency oscillator setpoint pin. By modifying the resistors and capacitors connected to this pin, the frequency of the oscillator in the control chip 5 can be controlled. The main function of the oscillator is to generate a stable clock signal, and the clock signal is to ensure that each module inside the control chip 5 can work together according to the predetermined timing and rate.

[0073] In a specific implementation, the control chip 5 outputs high and low levels to the boost module 1 according to the frequency period set by the oscillator, thereby realizing the control of the output of the boost module 1.

[0074] Further, considering that the power supply voltage of the low-voltage power supply is not the normal supply voltage required by the laser, the power supply voltage of the low-voltage power supply is boosted. The boosting module 1 includes: MOS transistor Q, first capacitor R1, second capacitor R2, zener diode D, and inductor L;

[0075] The gate of the MOS transistor Q is connected to the output pin of the control chip 5. The drain of the MOS transistor Q is respectively connected to the second end of the inductor L and the anode of the zener diode D. The source of the MOS transistor Q is grounded. The first end of the first capacitor C1 is respectively connected to the safety module 4 and the first end of the inductor L. The second ends of the first capacitor C1 and the second capacitor C2 are grounded. The first end of the second capacitor C2 is respectively connected to the cathode of the zener diode D and the drive module 2.

[0076] It can be understood that when the gate of the MOS transistor D receives a high level, the connection between the inductor L and the ground is conducted. When the gate of the MOS transistor D receives a low level, the connection between the inductor L and the ground is disconnected.

[0077] It should be noted that the MOS transistor D can be an NMOS transistor or a PMOS transistor, which is not limited in this embodiment. The first capacitor C1 and the second capacitor C2 can be composed of multiple capacitors in parallel. The first capacitor C1 and the second capacitor C2 are used to store energy. The sizes of the inductor L, the first capacitor C1, and the second capacitor C2 can be set according to actual situations, which is not limited in this embodiment. The zener diode D is used to prevent the second capacitor C2 from discharging to the ground and stabilize the first voltage signal. The inductor L is used to transfer energy.

[0078] In specific implementation, when the boosting module 1 detects the input of the low-voltage power supply, the low-voltage power supply charges the first capacitor C1. When the control chip 5 outputs a high level, the MOS transistor D conducts the connection between the inductor L and the ground, and the first capacitor C1 releases the stored energy to the inductor L. When the control chip 5 outputs a low level, the MOS transistor D disconnects the connection between the inductor L and the ground, and the inductor L releases the stored energy to the second capacitor C2. The second capacitor C2 releases the stored energy and converts it into the first voltage signal required by the laser.

[0079] Further, considering the magnitude of the output voltage of the boosting module 1, the output voltage is sampled. The safety laser power supply circuit further includes: a voltage sampling module 6;

[0080] The voltage sampling module 6 is respectively connected to the voltage sampling pin of the control chip 5 and the boosting module 1;

[0081] The voltage sampling module 6 is configured to receive the first voltage signal and transmit the sampled first voltage signal to the control chip 5, and the control chip controls the output by analyzing the first voltage signal.

[0082] It should be noted that the voltage sampling module 6 can be a resistor voltage division circuit, a differential amplifier circuit, or an internal feedback amplifier circuit, which can be set according to actual needs and is not limited in this embodiment.

[0083] In specific implementation, when the voltage sampling module 6 receives the first voltage signal, it transmits the sampled first voltage signal to the control chip 5. The control chip 5 controls the output of high level and low level by analyzing the first voltage signal, thereby controlling the on / off of the MOS transistor D and further controlling the output of the boost module 1.

[0084] Furthermore, considering whether the output voltage of the boost module 1 exceeds a preset overvoltage point and then performing overvoltage protection on the drive module 2, the safety laser power supply circuit further includes: an overvoltage protection module 7;

[0085] The overvoltage protection module 7 is respectively connected to the overvoltage protection pin of the control chip 5 and the boost module 1;

[0086] The overvoltage protection module 7 is configured to receive the first voltage signal and transmit an overvoltage signal to the control chip 5 when the amplitude of the first voltage signal exceeds a preset overvoltage threshold;

[0087] The control chip 5 is configured to stop outputting a switching signal to the boost module 1 when receiving the overvoltage signal.

[0088] It can be understood that the amplitude of the first voltage signal is the voltage required by the laser, for example: DC voltages such as 137V and 180V. The preset overvoltage threshold is the maximum voltage that the drive module 2 can withstand. The overvoltage signal can be 1 or 0, which can be set according to actual needs and is not limited in this embodiment.

[0089] It should be noted that the overvoltage protection module 7 can be a voltage clamping overvoltage protection circuit, which can be set according to actual needs and is not limited in this embodiment. The overvoltage signal is a voltage signal, and the switching signal is a high level.

[0090] In specific implementation, the overvoltage protection module 7 receives the first voltage signal and transmits an overvoltage signal to the control chip 5 when the amplitude of the first voltage signal exceeds a preset overvoltage threshold. When the control chip 5 receives the overvoltage signal, it stops outputting a high level to the MOS transistor D, thereby disconnecting the output of the boost module 1.

[0091] In this embodiment, when the air-cooled radiator 3 detects the power voltage signal output by the low-voltage power supply, it dissipates heat from the laser. When the air-cooled radiator 3 detects that the average temperature of the laser is lower than 25 °C, the air-cooled radiator 3 operates at half power. When the air-cooled radiator 3 detects that the average temperature of the laser is higher than 25 °C, the air-cooled radiator 3 operates at full power. When the safety module 4 receives the power voltage signal output by the low-voltage power supply, it detects the power voltage signal, and when the power voltage is within the preset safety threshold, the relay coil in the safety module 4 is energized, the normally open relay contact is closed, the connection between the low-voltage power supply and the boost module is conducted, and the power voltage signal is transmitted to the boost module 1. The control chip 5 outputs high and low levels to the boost module 1 according to the frequency period set by the oscillator, so as to control the output of the boost module 1. When the boost module 1 detects the input of the low-voltage power supply, the low-voltage power supply charges the first capacitor C1. When the control chip 5 outputs a high level, the MOS transistor D conducts the connection between the inductor L and the ground. The first capacitor C1 releases the stored energy to the inductor L. When the control chip 5 outputs a low level, the MOS transistor D disconnects the connection between the inductor L and the ground. The inductor L releases the stored energy to the second capacitor C2. The second capacitor C2 releases the stored energy and converts it into the first voltage signal required by the laser. When the voltage sampling module 6 receives the first voltage signal, it transmits the sampled first voltage signal to the control chip 5. The control chip 5 controls the output of high and low levels by analyzing the first voltage signal, so as to control the on and off of the MOS transistor D, and thus control the output of the boost module 1. The overvoltage protection module 7 receives the first voltage signal. When the amplitude of the first voltage signal exceeds the preset overvoltage threshold, it transmits an overvoltage signal to the control chip 5. When the control chip 5 receives the overvoltage signal, it stops outputting a high level to the MOS transistor D, thereby disconnecting the output of the boost module 1, thereby improving the safety of the circuit.

[0092] Refer to Figure 3 , Figure 3 FIG. is the circuit schematic diagram of the safety laser power supply circuit in the second embodiment of the safety laser power supply circuit proposed in the embodiment of the present application.

[0093] Based on the second embodiment, as Figure 3 shown, the voltage sampling module in this embodiment includes: a first resistor R1;

[0094] The first resistor R1 is respectively connected to the voltage sampling pins of the boost module 1 and the control chip 5.

[0095] It should be noted that the value of the first resistor R1 can be set according to actual conditions, and this embodiment does not limit it.

[0096] In specific implementation, the first resistor R1 divides the voltage of the first voltage signal output by the boost module 1, the control chip 5 samples the divided first voltage signal, and the control chip 5 controls the output of high level and low level by analyzing the first voltage signal, thereby controlling the on / off of the MOS transistor D, and thus controlling the output of the boost module 1.

[0097] Further, the overvoltage protection module includes: a second resistor R2;

[0098] The second resistor R2 is respectively connected to the boost module 1 and the overvoltage protection pin of the control chip 5.

[0099] It should be noted that the value of the second resistor R2 can be set according to actual conditions, and this embodiment does not limit it.

[0100] In specific implementation, the second resistor R2 divides the voltage of the first voltage signal output by the boost module 1. When the amplitude of the divided first voltage signal exceeds a preset overvoltage threshold, an overvoltage signal is transmitted to the control chip 5. When the control chip 5 receives the overvoltage signal, it stops outputting a high level to the MOS transistor D, thereby preventing the output of the boost module 1.

[0101] In this embodiment, the first resistor R1 divides the voltage of the first voltage signal output by the boost module 1, the control chip 5 samples the divided first voltage signal, and the control chip 5 controls the output of high level and low level by analyzing the first voltage signal, thereby controlling the on / off of the MOS transistor D, and thus controlling the output of the boost module 1. The second resistor R2 divides the voltage of the first voltage signal output by the boost module 1. When the amplitude of the divided first voltage signal exceeds a preset overvoltage threshold, an overvoltage signal is transmitted to the control chip 5. When the control chip 5 receives the overvoltage signal, it stops outputting a high level to the MOS transistor D, thereby preventing the output of the boost module 1, thereby improving the safety of the circuit.

[0102] To achieve the above object, the present application also proposes a laser, and the laser includes the delay protection circuit as described above.

[0103] For the specific structure of the safety laser power supply circuit, refer to the above embodiment. Since this laser adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated here one by one.

[0104] The above are only the preferred embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A safe laser power supply circuit, characterized in that: The safety laser power supply circuit comprises: a boost module and a drive module; The driving module is connected to the boost module and the laser respectively, and the boost module is also connected to a low-voltage power supply; The boost module is used for, when receiving the power supply voltage signal output by the low-voltage power supply, converting the power supply voltage signal into a first voltage signal required by the laser, and transmitting the first voltage signal to the driving module; The driving module is configured to drive the laser based on the first voltage signal when receiving the first voltage signal.

2. The safety laser power supply circuit according to claim 1, characterized in that: The safety laser power supply circuit also includes: an air-cooled radiator; The air-cooled radiator is connected to the low-voltage power supply; The air-cooled heat sink is used to dissipate heat when receiving the power supply voltage signal output by the low-voltage power supply.

3. The safety laser power supply circuit according to claim 1, characterized in that: The safety laser power supply circuit also includes: a safety module; The safety module is connected to the low voltage power supply and the boost module respectively; The safety module is used to detect the power supply voltage signal when receiving the power supply voltage signal output by the low-voltage power supply, and transmit the power supply voltage signal to the boost module when the power supply voltage is within a preset safety threshold.

4. The safety laser power supply circuit according to claim 3, characterized in that: The safety laser power supply circuit also includes: a control chip; The ground pin of the control chip is connected to the safety module, the output pin of the control chip is connected to the boost module, and the power supply pin of the control chip is connected to the safety module and the boost module respectively.

5. The safety laser power supply circuit according to claim 4, characterized in that: The boost module includes: a MOS tube, a first capacitor, a second capacitor, a voltage regulator diode and an inductor; The gate of the MOS tube is connected to the output pin of the control chip, the drain of the MOS tube is respectively connected to the second end of the inductor and the anode of the voltage-stabilizing diode, the source of the MOS tube is grounded, the first end of the first capacitor is respectively connected to the first end of the voltage-stabilizing module and the inductor, the second ends of the first capacitor and the second capacitor are grounded, and the first end of the second capacitor is respectively connected to the cathode of the voltage-stabilizing diode and the driving module.

6. The safety laser power supply circuit according to claim 4, characterized in that: The safety laser power supply circuit also includes: a voltage sampling module; The voltage sampling module is respectively connected to the voltage sampling pin of the control chip and the boost module; The voltage sampling module is used to transmit the sampled first voltage signal to the control chip when receiving the first voltage signal, and the control chip controls the output by analyzing the first voltage signal.

7. The safety laser power supply circuit according to claim 6, characterized in that: The voltage sampling module includes: a first resistor; The first resistor is connected to the voltage sampling pins of the boost module and the control chip respectively.

8. The safety laser power supply circuit according to claim 4, characterized in that: The safety laser power supply circuit also includes: an overvoltage protection module; The overvoltage protection module is respectively connected to the overvoltage protection pin of the control chip and the boost module; The overvoltage protection module is used to receive a first voltage signal, and transmit the overvoltage signal to the control chip when the amplitude of the first voltage signal exceeds a preset overvoltage threshold; The control chip is used to stop outputting the switch signal to the boost module when receiving an overvoltage signal.

9. The safety laser power supply circuit according to claim 8, characterized in that: The overvoltage protection module includes: a second resistor; The second resistor is connected to the overvoltage protection pins of the boost module and the control chip respectively.

10. A laser, characterized in that: The laser comprises the safety laser power supply circuit according to any one of claims 1 to 9.

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