A pulsed Nd:YAG laser treatment system

Abstract

The present application relates to a kind of pulse Nd: YAG laser treatment systems, system includes: power protection module accesses pulse laser driving power supply power supply;Pulse laser driving power supply is converted into the high voltage high current output required by optical system from 220V alternating current;Optical system converts pulse direct current into pulse laser output, and the output pulse laser is transmitted to the optical fiber treatment head of treatment handle by medical laser optical fiber of beam transmission system;Cooling system provides constant temperature guarantee when optical system works;Control system and pulse laser driving power supply adjust the output parameter of optical system, and the water mist system treatment water shortage is prompted;Control system and cooling system protect the work of optical system and pulse laser driving power supply, and control system and water mist system adjust the treatment water vapor size.The present application avoids the damage of laser thermal effect to surrounding normal tissue, with good curative effect, small side effect, and the characteristics of high treatment safety.

Description

Technical Field

[0001] This invention relates to the field of electrical data processing, and more particularly to a pulsed Nd:YAG laser therapy system. Background Technology

[0002] Currently, pulsed Nd:YAG laser therapy machines use either traditional free-oscillating / Q-switched lasers or MOPA lasers, each with its own advantages and disadvantages in terms of technology and clinical applications. The core difference lies in the fact that traditional solid-state lasers store and release energy within the laser rod, with parameters mutually constrained; while MOPA separates the generation of seed light and the amplification of energy, achieving decoupling and independent control of parameters.

[0003] Free oscillation pulses have a fixed and relatively wide pulse width. The formation of relaxation oscillations depends on the natural accumulation and consumption of inverted particle numbers, and the pulse cannot be actively compressed. Q-switched pulses have a fixed but narrower pulse width. By abruptly changing the Q value within the cavity, energy stored over a long period is released within nanoseconds. The pulse width depends on the cavity length and switching speed, and is strongly coupled with the repetition frequency and pump energy. MOPA achieves independently adjustable parameters. The seed source (usually a semiconductor laser) directly modulates the low-energy pulses of the required pulse width and frequency via electrical signals. The amplifier (fiber or solid-state) only amplifies the pulse as is, without changing the pulse's time-domain characteristics. In clinical thermal damage control, at the same pulse energy, a narrower sub-pulse width can improve ablation quality, reduce pulp chamber temperature rise, and obtain better ablation pit morphology. However, traditional free oscillation methods cause greater thermal damage, are prone to carbonization, and result in stronger patient pain and more severe postoperative reactions. Traditional Q-switched methods have weak tissue removal capabilities, cannot effectively stop bleeding, and have high equipment costs. MOPA lasers are expensive, bulky, require high maintenance, and have limited clinical experience. Therefore, how to improve the technical and clinical advantages of the current pulsed Nd:YAG laser therapy machine with fixed pulse duration by improving the main control software components and using an ARM microcontroller-controlled pre-burn + current pulse width modulation drive power supply to achieve independent adjustment of its laser pulse output energy, pulse width, and repetition rate is a problem that needs to be considered. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pulsed Nd:YAG laser therapy system that solves the deficiencies of the prior art.

[0005] The objective of this invention is achieved through the following technical solution: a pulsed Nd:YAG laser therapy system, the system comprising a power protection module, a pulsed laser drive power supply, an optical system, a beam transmission system, a control system, a water mist system, a protection system, and a treatment handpiece; The power protection module divides the mains power into two paths: one path is connected to a low-voltage DC power supply component, and the other path is connected to a pulsed laser driver power supply. The pulsed laser driver power supply converts 220V AC power into the high voltage and high current output required by the optical system. The optical system converts pulsed direct current into pulsed laser output, and the output pulsed laser is transmitted to the fiber optic treatment head of the treatment handpiece through the medical laser fiber of the beam transmission system. The cooling system provides constant temperature protection for the optical system during operation; The control system and pulsed laser drive power supply adjust the output parameters of the optical system and provide a warning when the water mist system is running low on treatment water volume. The control and cooling systems protect the optical system and pulsed laser drive power supply, while the control and water mist systems regulate the amount of water vapor used for treatment.

[0006] The control system includes two processes: control and detection. During the control process, the control cooling system outputs the circulating cooling water required for the operation of the optical system and the cooling air required for the operation of the whole machine. It outputs parameters such as the terminal laser pulse energy, pulse duration, and pulse repetition frequency required for the current treatment of the disease to the pulse laser drive power supply. The pulse laser drive power supply controls the optical system to complete the laser output that meets the parameters. At the same time, the control system outputs the amount of treatment water required for the current treatment of the disease and the water mist parameters corresponding to the on / off of treatment air, so as to meet the required amount and presence of water mist for the treatment of the disease. During the testing process, signals from the protection system, such as the pulsed laser driver power supply successfully energized, the foot switch during startup preparation, the cooling water flow rate of the cooling system, and the cooling water temperature of the optical system exceeding the limit, are monitored in real time. If any abnormal signal is detected, the corresponding alarm interface will pop up, and the laser and water mist will stop outputting. At the same time, the treatment water volume signal of the water mist system will be monitored. If any abnormality is detected, a water shortage flash and an intermittent buzzer sound will be displayed as a warning.

[0007] After the pulsed laser drive power supply successfully executes the pre-ignition command issued by the control system, it receives the settings / modifications of pulse duration, energy storage voltage, and repetition frequency from the control system, converts them into the laser pulse duration required for the optical system to work, the pulsed xenon lamp current corresponding to the laser pulse energy, and the number of laser outputs per unit time, and loads them onto the pulsed xenon lamp of the optical system to control its light emission state.

[0008] Correction of pulse duration includes: A1. Let the duration of the laser pulse monitored by the photodetector + oscilloscope be t, the pulse duration set / modified by the control system be t1, and the pulse duration sensing signal received from the optical system be t2. If t2 is within the allowable error range of t1, then t1 is not actively modified to t3. If t2 is outside the allowable error range of t1, then t1 is actively adjusted to t3. t3 represents the pulse duration after the first active modification. A2. Re-receive t2 corresponding to t3 and compare it with t1. Repeat the process of A1 n times until the position of t2 is adjusted within the allowable error range of t1, and save t1 and tn. A3. Repeat the correction process of A1 and A2, correcting the tn value of each point from 100μs to 250μs with a step size of 10μs, and save them one by one.

[0009] Correcting the laser pulse energy includes: B1. The laser energy meter monitors the laser pulse energy E at the terminal, controls the system to set / modify the terminal laser pulse energy E1, receives the pulse xenon lamp high current sampling voltage V2 from the optical system, compares it with the energy storage voltage V1 corresponding to E1, and if E is outside the allowable error range of E1, it actively adjusts V1 to V3, where V3 represents the energy storage voltage after the first active modification. B2. Re-receive E corresponding to V3 and compare it with E1. Repeat the process of B1 n times until E is adjusted to a position within the allowable error range of E1. Save E1 and Vn. B3. Repeat the correction process of B1 and B2, correcting the Vn value of each point from 10mJ to 200mJ with a step size of 5mJ, and save them one by one.

[0010] When the system is working, it receives the pulse duration t, energy storage voltage V, and pulse repetition frequency f set / modified from the control system. For each output laser pulse, it reads the corresponding t2 and V2 values ​​in real time and compares them with tn and Vn respectively. If they are both within the allowable error range, it continues to control the optical system to work according to t and V and f. If t2 / V2 is not within the allowable error range, it will alarm and prompt that recalibration is required, and control the optical system to stop working.

[0011] The optical system consists of a pulsed laser generator, a focusing device, and a detection device. The focusing device is composed of a high-power coupler, and the detection device is composed of an integrating pulse current transformer and a photodetector. The pulsed current I flowing through the pulsed xenon lamp is linearly converted into a pulsed voltage U of the same waveform by an integrating pulsed current transformer. The signal is then adjusted to the set waveform by a level-up and scaling circuit composed of operational amplifiers. The signal is then connected to the pulsed laser drive power supply and the ADC sampling program in the microcontroller is run to continuously sample the signal, converting the continuous analog voltage into discrete digital values. Substituting the acquired digital values ​​into the formula I=G×Umeasured, the complete waveform of the current pulse is reconstructed in real time, and the peak current, pulse width, and average current are calculated to achieve accurate measurement of the pulse current. G represents the equivalent admittance, I represents the pulsed large current flowing through the pulsed xenon lamp, and Umeasured represents the discrete digital voltage value obtained by sampling.

[0012] The set waveform identified by the pulsed laser driver power supply is obtained by the photodetector. After the pulsed laser driver power supply is filtered, the duration of the high level of the waveform is read as the pulse duration. The cooling water temperature of the optical system is detected by a water temperature control switch. If the temperature does not meet the requirements, the temperature control switch outputs a high / low level to the control system, and the control system takes appropriate action.

[0013] This invention has the following advantages: A pulsed Nd:YAG laser therapy system can release laser energy in a very short time (100μs-250μs) to form a giant pulse with a very high energy density. When the giant laser pulse is absorbed by the diseased tissue, it forms a local shock wave that breaks down the diseased tissue and is absorbed by the human body. Because the interaction time between the laser energy and biological tissue is very short, and the laser pulse output is supplemented by mist-like water vapor cooling, the damage of laser thermal effect to surrounding normal tissues is avoided. It has the characteristics of good efficacy, few side effects, and high treatment safety. Attached Figure Description

[0014] Figure 1 This is a schematic diagram illustrating the principle of the present invention.

[0015] Figure 2 A schematic diagram of the control system.

[0016] Figure 3 This is a schematic diagram of the principle of a pulsed laser driving power supply.

[0017] Figure 4 This is a schematic diagram of the optical system.

[0018] Figure 5 A schematic diagram illustrating the principle of the protection system.

[0019] Figure 6 This is a schematic diagram of the cooling system.

[0020] Figure 7 This is a schematic diagram of the water mist system. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of this application provided below with reference to the accompanying drawings is not intended to limit the scope of protection of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. The present invention will be further described below with reference to the accompanying drawings.

[0022] This invention specifically relates to a pulsed Nd:YAG laser therapy system, which employs pulsed laser output and water vapor mist spraying for treatment, including three types: irradiation therapy, cutting therapy, and adjuvant therapy. Irradiation therapy uses a low-pulse-power (low terminal laser pulse energy, long pulse duration) and low-pulse-repetition-frequency laser to irradiate the organism, stimulating it and enhancing non-specific immunity. Cutting therapy uses a high-pulse-power (high terminal laser pulse energy, short pulse duration) and high-pulse-repetition-frequency laser to contact the organism; the focused laser beam is absorbed by the tissue, instantly coagulating, carbonizing, and vaporizing the tissue. When the beam moves at a certain speed, it can continuously cut through the tissue for cutting therapy. In adjuvant therapy, the laser, water, and air are mixed in a specific ratio and applied to the lesion. This avoids thermal damage to the surrounding tissue caused by the instantaneous high temperature of the laser, promoting tissue repair. Secondly, it produces a morphine-like analgesic effect, allowing patients to complete treatment efficiently and painlessly. Thirdly, it provides the doctor with a clear view and a prominent lesion site during treatment, avoiding mistreatment.

[0023] like Figure 1 As shown, it specifically includes the following: This invention uses 220VAC mains power, and connects to a low-voltage DC power supply component via an air switch → EMI power filter → surge protector → fuse, outputting DC5V, DC12V and DC24V; and supplies power to the pulse laser drive power supply.

[0024] The pulsed laser driver converts AC220V alternating current into high-voltage, high-current pulsed direct current output required by the optical system. The optical system then converts this pulsed direct current into pulsed laser output. The cooling system provides constant temperature protection for the optical system during operation. The control system and pulsed laser driver regulate the output parameters of the optical system (terminal laser pulse energy, pulse duration, low pulse repetition frequency). The control system and cooling system also protect the optical system and pulsed laser driver, and provide alerts for insufficient water volume in the water mist system. Furthermore, the control system and water mist system adjust the amount of water vapor used in the treatment.

[0025] The pulsed laser output from the optical system is transmitted via a medical laser fiber optic beam transmission system to the fiber optic treatment head exposed in the treatment handpiece. The water mist system uses sterilized distilled water and filtered air, which are pressurized and transmitted to the treatment handpiece through a periodically sterilized medical silicone tube in the beam transmission system, forming a therapeutic water mist jet output. The pulsed laser and therapeutic water mist are guided to the affected area through the treatment handpiece.

[0026] like Figure 2 As shown, the control system consists of an SGUS touchscreen and a main control board with an STM32 microcontroller, a WIFI circuit, and a DC power supply step-down return as its core. It controls the operation of the pulsed laser drive power supply, cooling system, and water mist system, and detects the signal status of the protection system.

[0027] During the control process, according to the needs of the work process, the cooling system outputs the circulating cooling water required for the optical system and the cooling air required for the whole machine to work; it outputs parameters such as the terminal laser pulse energy, pulse duration, and pulse repetition frequency required for the current treatment of the disease to the pulse laser drive power supply, and the pulse laser drive power supply controls the optical system to complete the laser output that meets the parameters; it controls the water mist system to output the corresponding water mist parameters such as the amount of treatment water and the on / off state of treatment air required for the current treatment of the disease, so as to meet the required amount and presence of water mist for the treatment of the disease.

[0028] During laser output, the touchscreen displays an animated message "Treatment in progress..." accompanied by intermittent "beep" warning sounds.

[0029] During the testing process, signals from the protection system, such as the pulsed laser driver power supply successfully activating in standby mode, the foot switch during startup preparation, the cooling water flow rate of the cooling system, and the cooling water temperature exceeding the limit of the optical system, are monitored in real time. If any of these signals are abnormal, the corresponding alarm interface will pop up, and the product's laser and water mist output will stop. At the same time, signals such as the treatment water volume of the water mist system are also monitored. If this signal is abnormal, the current interface will display a "water shortage" flashing and an intermittent buzzing sound.

[0030] Furthermore, real-time operational status information is transmitted to the Internet via a Wi-Fi router and stored in a cloud database. The background monitoring software accesses the cloud database in real time to obtain the product's real-time operational status information, enabling users to understand the product's operational status immediately and greatly supporting after-sales service and clinical applications.

[0031] like Figure 3 As shown, the pulsed laser driver power supply is controlled by an ARM microcontroller (such as an STM32 microcontroller). After successfully executing the pre-ignition command issued by the control system, it receives the settings / modifications of the pulse duration (corresponding to the high current duration of the pulsed xenon lamp in the optical system), energy storage voltage (corresponding to the current applied to the pulsed xenon lamp in the optical system), and repetition frequency (corresponding to the number of times the pulsed xenon lamp in the optical system emits light per unit time) from the control system. It converts these into the laser pulse duration, the pulsed xenon lamp current corresponding to the laser pulse energy, and the number of laser outputs per unit time required for the optical system to work, and applies them to the pulsed xenon lamp in the optical system to control its emission state.

[0032] Pulse duration correction specifically includes the following: The laser pulse duration t is monitored by a photodetector and oscilloscope, and the pulse duration is set / modified to t1 by the control system.

[0033] The pulse duration sensing signal t2 from the optical system is received and compared with t1. If t2 is within the tolerance range of t1, t1 is not actively modified to t3. If it is outside the tolerance range of t1, t1 is actively adjusted to t3, and t2 corresponding to t3 is received again and compared with t1. t3 represents the pulse duration after the first active modification (appropriately decreasing or increasing). The above process is repeated n times until t2 is adjusted to be within the tolerance range of t1. Then, t1 and tn are saved.

[0034] Repeat the t1 correction process, correcting the tn value of each point from 100 to 250 μs with a step size of 10 μs, and save them one by one.

[0035] Terminal laser pulse energy correction specifically includes the following: The laser energy meter monitors the laser pulse energy E at the terminal, and the multimeter monitors the energy storage voltage V. The control system sets / modifies the terminal laser pulse energy E1.

[0036] The system receives the pulsed xenon lamp high-current sampling voltage V2 from the optical system and compares it with the energy storage voltage V1 corresponding to E1. If E is within the tolerance range of E1, V1 is not actively modified. If E is outside the tolerance range of E1, V1 is actively adjusted to V3, and the E corresponding to V3 is received again and compared with E1. V3 represents the energy storage voltage after the first active modification (appropriately decreasing or increasing). This process is repeated n times until E is adjusted to be within the tolerance range of E1, and then E1 and Vn are saved.

[0037] Repeat the E1 correction process, correcting the Vn value of each point from 10 to 200 mJ in step sizes of 5 mJ, and save them one by one.

[0038] During operation, the system receives settings / modifications from the control system for pulse duration t, energy storage voltage V, and pulse repetition frequency f. For each output laser pulse, the corresponding values ​​of t2 and V2 are read in real time and compared with tn and Vn respectively. If both are within their tolerance ranges, the optical system continues to operate according to f based on t and V. If t2 / V2 is outside the tolerance ranges of tn / Vn, an alarm is triggered indicating the need for recalibration, and the optical system stops operating.

[0039] like Figure 4 As shown, the optical system mainly consists of a pulsed laser generator, a focusing device, and a detection device. The pulsed laser generator comprises an Nd:YAG laser rod with 1064nm films coated at both ends, a pulsed xenon lamp, and a ceramic cavity; the focusing device consists of a high-power coupler; and the detection device consists of an integrating pulsed current transformer (discrete Rogowski coil + external integrator) and a photodetector (InGaAs PIN detector + high-speed comparator).

[0040] The pulsed laser drive power supply receives the set / modified values ​​of pulse duration, energy storage voltage, and repetition frequency from the control system, converts them into parameters for controlling the operation of the optical system, and loads them onto the pulsed xenon lamp of the optical system. By controlling the luminous intensity (energy storage voltage), single emission time (pulse duration), and number of emission times per unit time (pulse repetition frequency) of the pulsed xenon lamp, the Nd:YAG laser rod is pumped to emit 1064nm pulsed laser light.

[0041] An integrating pulse current transformer linearly converts the large pulse current I flowing through the pulsed xenon lamp into a pulsed voltage U of the same waveform. This output voltage U is then adjusted to a 0-3.3V waveform by a level-up and scaling circuit composed of operational amplifiers. This signal is connected to the ADC input pin of the STM32 microcontroller in the pulsed laser driver power supply. Running the STM32 microcontroller's ADC sampling program, the signal is continuously sampled at a sufficiently high frequency (for pulses of 100-250μs, the sampling rate must be at least 1MHz to capture waveform details), converting the continuous analog voltage into discrete digital values. In the STM32 code, the acquired digital values ​​are substituted into the formula I=G×Umeasured to reconstruct the complete waveform of the current pulse in real time. Parameters such as peak current, pulse width, and average current can be easily calculated, enabling accurate measurement of the pulsed current. Here, G is a constant determined by the transformer's own parameters, called the equivalent admittance; I represents the large pulse current flowing through the pulsed xenon lamp; and Umeasured represents the sampled discrete digital voltage value.

[0042] The photodetector (with a 50Ω terminating resistor connected to ground at the output to prevent signal reflection from causing waveform distortion and affecting measurement accuracy) acquires a 0-3.3V square wave that the pulsed laser driver power supply can recognize. After the pulsed laser driver power supply is filtered by software (median filtering or mean filtering algorithm to process multiple measurement results), the duration of the high level of the square wave is read as the pulse duration.

[0043] The cooling water temperature of the optical system is detected by a water temperature control switch. Once the low or high temperature exceeds the limit, the temperature control switch outputs a high / low level to the control system, and the control system takes appropriate action.

[0044] like Figure 5 As shown, the protection system mainly consists of the pulsed laser driver power supply standby success, foot switch during startup preparation, cooling water flow of the cooling system, over-limit cooling water temperature of the optical system, treatment water volume detection circuit of the water mist system, and warning reminders during laser output. It protects the safety of equipment use, patient treatment safety, and user operation safety.

[0045] Fault indication: After the product detects a protection signal, the "Operation Fault" interface indicates that the product cannot proceed to the next step, or the pulsed laser or therapeutic water mist output stops.

[0046] Warning: After the product detects a protection signal, a "Friendly Reminder" message will appear on the screen. The product can only proceed to the next step or continue to output pulsed laser or therapeutic water mist after this message disappears automatically or manually.

[0047] like Figure 6 As shown, the cooling system mainly consists of a water tank, temperature sensor, DC water pump, cooling coil, evaporator, and AC fan. Water tank and DC water pump: Through pipes connected to the focusing cavity of the optical system, the DC water pump circulates cooling water into the water tank, carrying away the heat generated by the optical system during operation and ensuring reliable operation. Temperature sensor: Monitors the cooling water temperature in real time.

[0048] Cooling element: When the cooling water temperature exceeds the upper limit setting value, the cooling element works to cool the cooling water; when the cooling water temperature is below the lower limit setting value, the cooling element works to heat the cooling water; when the cooling water temperature is between the lower and upper limits of the setting value, it stops working.

[0049] Evaporator: Following the cooling plates, it further cools the circulating water.

[0050] AC fan: Exchanges the heat generated by the cooling coils and evaporator with the outside environment through convection.

[0051] like Figure 7As shown, the water mist system consists of a therapeutic water vapor generator, a therapeutic water regulating device, a therapeutic gas switching device, a therapeutic water vapor balancing device, and a liquid level sensor.

[0052] The therapeutic water vapor generator consists of a filter, a DC air pump, a therapeutic water vapor storage bottle, and a peristaltic pump, and is mainly used to generate the therapeutic water vapor required in clinical practice.

[0053] Treatment water regulating device: Composed of a peristaltic pump, it interfaces with the control system and mainly regulates the amount of treatment water and whether it is output.

[0054] Therapeutic gas switch device: It consists of a therapeutic gas solenoid valve, which interfaces with the control system and mainly controls whether therapeutic gas is output to the therapeutic handle.

[0055] Treatment water-air balance device: It consists of a water balance solenoid valve, an air balance solenoid valve, and a return water box. It interfaces with the control system to ensure that no water droplets are output after the water mist stops outputting.

[0056] Liquid level sensor: Part of the protection system, it interfaces with the control system to detect water shortage in the treatment water and trigger an alarm when the treatment water volume is insufficient.

[0057] The therapeutic water stored in the therapeutic water reservoir is delivered to the treatment handle by adjusting the pump speed of the peristaltic pump through the control system. The operation of the peristaltic pump controls the output of the therapeutic water. The therapeutic gas stored in the therapeutic gas reservoir is output through a solenoid valve. The two are mixed at the treatment handle and sprayed out in separate water / gas / water mist forms to meet the treatment needs of different clinical cases.

[0058] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and improvements, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A pulsed Nd:YAG laser therapy system, characterized in that: The system includes a power protection module, a pulsed laser drive power supply, an optical system, a beam transmission system, a control system, a water mist system, a protection system, and a treatment handpiece; The power protection module divides the mains power into two paths: one path is connected to a low-voltage DC power supply component, and the other path is connected to a pulsed laser driver power supply. The pulsed laser driver power supply converts 220V AC power into the high voltage and high current output required by the optical system. The optical system converts pulsed direct current into pulsed laser output, and the output pulsed laser is transmitted to the fiber optic treatment head of the treatment handpiece through the medical laser fiber of the beam transmission system. The cooling system provides constant temperature protection for the optical system during operation; The control system and pulsed laser drive power supply adjust the output parameters of the optical system and provide alerts when the water mist system is running low on treatment water volume. The control and cooling systems protect the optical system and pulsed laser drive power supply, while the control and water mist systems regulate the amount of water vapor used for treatment.

2. The pulsed Nd:YAG laser therapy system according to claim 1, characterized in that: The control system includes two processes: control and detection. During the control process, the control cooling system outputs the circulating cooling water required for the operation of the optical system and the cooling air required for the operation of the whole machine. It outputs parameters such as the terminal laser pulse energy, pulse duration, and pulse repetition frequency required for the current treatment of the disease to the pulse laser drive power supply. The pulse laser drive power supply controls the optical system to complete the laser output that meets the parameters. At the same time, the control system outputs the amount of treatment water required for the current treatment of the disease and the water mist parameters corresponding to the on / off of treatment air, so as to meet the required amount and presence of water mist for the treatment of the disease. During the testing process, signals from the protection system, such as the pulsed laser driver power supply successfully energized, the foot switch during startup preparation, the cooling water flow rate of the cooling system, and the cooling water temperature of the optical system exceeding the limit, are monitored in real time. If any abnormal signal is detected, the corresponding alarm interface will pop up, and the laser and water mist will stop outputting. At the same time, the treatment water volume signal of the water mist system will be monitored. If any abnormality is detected, a water shortage flash and an intermittent buzzer sound will be displayed as a warning.

3. The pulsed Nd:YAG laser therapy system according to claim 1, characterized in that: After the pulsed laser drive power supply successfully executes the pre-ignition command issued by the control system, it receives the settings / modifications of pulse duration, energy storage voltage, and repetition frequency from the control system, converts them into the laser pulse duration required for the optical system to work, the pulsed xenon lamp current corresponding to the laser pulse energy, and the number of laser outputs per unit time, and loads them onto the pulsed xenon lamp of the optical system to control its light emission state.

4. The pulsed Nd:YAG laser therapy system according to claim 3, characterized in that: Correction of pulse duration includes: A1. Let the duration of the laser pulse monitored by the photodetector + oscilloscope be t, the pulse duration set / modified by the control system be t1, and the pulse duration sensing signal received from the optical system be t2. If t2 is within the allowable error range of t1, then t1 is not actively modified to t3. If t2 is outside the allowable error range of t1, then t1 is actively adjusted to t3. t3 represents the pulse duration after the first active modification. A2. Re-receive t2 corresponding to t3 and compare it with t1. Repeat the process of A1 n times until the position of t2 is adjusted within the allowable error range of t1, and save t1 and tn. A3. Repeat the correction process of A1 and A2, correcting the tn value of each point from 100μs to 250μs with a step size of 10μs, and save them one by one.

5. The pulsed Nd:YAG laser therapy system according to claim 4, characterized in that: Correcting the laser pulse energy includes: B1. The laser energy meter monitors the laser pulse energy E at the terminal, controls the system to set / modify the terminal laser pulse energy E1, receives the pulse xenon lamp high current sampling voltage V2 from the optical system, compares it with the energy storage voltage V1 corresponding to E1, and if E is outside the allowable error range of E1, it actively adjusts V1 to V3, where V3 represents the energy storage voltage after the first active modification. B2. Re-receive E corresponding to V3 and compare it with E1. Repeat the process of B1 n times until E is adjusted to a position within the allowable error range of E1. Save E1 and Vn. B3. Repeat the correction process of B1 and B2, correcting the Vn value of each point from 10mJ to 200mJ with a step size of 5mJ, and save them one by one.

6. The pulsed Nd:YAG laser therapy system according to claim 5, characterized in that: When the system is working, it receives the pulse duration t, energy storage voltage V, and pulse repetition frequency f set / modified from the control system. For each output laser pulse, it reads the corresponding t2 and V2 values ​​in real time and compares them with tn and Vn respectively. If they are both within the allowable error range, it continues to control the optical system to work according to t and V and f. If t2 / V2 is not within the allowable error range, it will alarm and prompt that recalibration is required, and control the optical system to stop working.

7. The pulsed Nd:YAG laser therapy system according to claim 1, characterized in that: The optical system consists of a pulsed laser generator, a focusing device, and a detection device. The focusing device is composed of a high-power coupler, and the detection device is composed of an integrating pulse current transformer and a photodetector. The pulsed current I flowing through the pulsed xenon lamp is linearly converted into a pulsed voltage U of the same waveform by an integrating pulsed current transformer. The signal is then adjusted to the set waveform by a level-up and scaling circuit composed of operational amplifiers. The signal is then connected to the pulsed laser drive power supply and the ADC sampling program in the microcontroller is run to continuously sample the signal, converting the continuous analog voltage into discrete digital values. Substituting the acquired digital values ​​into the formula I=G×Umeasured, the complete waveform of the current pulse is reconstructed in real time, and the peak current, pulse width, and average current are calculated to achieve accurate measurement of the pulse current. G represents the equivalent admittance, I represents the pulsed large current flowing through the pulsed xenon lamp, and Umeasured represents the discrete digital voltage value obtained by sampling.

8. The pulsed Nd:YAG laser therapy system according to claim 7, characterized in that: The set waveform identified by the pulsed laser driver power supply is obtained by the photodetector. After the pulsed laser driver power supply is filtered, the duration of the high level of the waveform is read as the pulse duration. The cooling water temperature of the optical system is detected by a water temperature control switch. If the temperature does not meet the requirements, the temperature control switch outputs a high / low level to the control system, and the control system takes appropriate action.

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