阅读说明：本技术 一种激光治疗仪 (Laser therapeutic instrument ) 是由 丁坦 梁卓文 王迎春 张永峰 于 2019-10-10 设计创作，主要内容包括：本发明公开了一种激光治疗仪,包括激光器和治疗光纤,其中,治疗光纤连接至激光器；激光器包括能量获取电源、处理器、激光输出电路、输入控制电路及激光光源；其中,处理器电连接输入控制电路及激光输出电路,用于根据输入控制电路输入的控制指令控制激光输出电路输出设定激光工作方式、波长、设定时间及设定能量的激光；激光输出电路电连接激光光源,用于控制激光光源的发光强度及发光时长；能量获取电源电连接激光输出电路,用于将震动或热能转换为电能,并为激光输出电路提供驱动电流。该激光治疗仪能够利用利用周围环境中的震动和热能实现自供电,节约电能、延长供电时间且便于携带。(The invention discloses a laser therapeutic apparatus, which comprises a laser and a therapeutic optical fiber, wherein the therapeutic optical fiber is connected to the laser; the laser comprises an energy acquisition power supply, a processor, a laser output circuit, an input control circuit and a laser light source; the processor is electrically connected with the input control circuit and the laser output circuit and is used for controlling the laser output circuit to output laser with set laser working mode, wavelength, set time and set energy according to a control instruction input by the input control circuit; the laser output circuit is electrically connected with the laser light source and is used for controlling the light emitting intensity and the light emitting duration of the laser light source; the energy acquisition power supply is electrically connected with the laser output circuit and is used for converting vibration or heat energy into electric energy and providing driving current for the laser output circuit. The laser therapeutic apparatus can realize self-power supply by utilizing vibration and heat energy in the surrounding environment, saves electric energy, prolongs power supply time and is convenient to carry.)

1. A laser therapeutic apparatus is characterized by comprising a laser (1) and a therapeutic optical fiber (2), wherein,

the treatment optical fiber (2) is connected to the laser (1) and is driven to emit light by the laser (1);

the laser (1) comprises an energy acquisition power supply (11), a processor (12), a laser output circuit (13), an input control circuit (14) and a laser light source (15); the processor (12) is electrically connected with the input control circuit (14) and the laser output circuit (13) and is used for controlling the laser output circuit (13) to output laser with set laser working mode, wavelength, set time and set energy according to a control instruction input by the input control circuit (14); the laser output circuit (13) is electrically connected with the laser light source (15) and is used for controlling the light emitting intensity and the light emitting duration of the laser light source (15); the energy acquisition power supply (11) is electrically connected with the laser output circuit (13) and is used for converting vibration or heat energy into electric energy and providing driving current for the laser output circuit (13).

2. Laser treatment apparatus according to claim 1, characterized in that the energy harvesting power supply (11) comprises a piezoelectric module (111), a thermoelectric module (112), a voltage control module (113) and a rechargeable battery (114), the piezoelectric module (111) and the thermoelectric module (112) being connected to the voltage control module (113), wherein,

the piezoelectric module (111) is used for acquiring vibration energy and converting the vibration energy into electric energy; the thermoelectric module (112) is used for acquiring heat energy and converting the heat energy into electric energy; the voltage control module (113) is used for receiving electric energy from the piezoelectric module (111) and the thermoelectric module (112) and generating stable output voltage; the rechargeable battery (114) is used for storing electric energy.

3. Laser treatment apparatus according to claim 2, characterized in that the piezoelectric module (111) comprises a piezoelectric sensor (1111), a negative pressure converter unit (1112) and an active diode unit (1113) connected in series,

the piezoelectric sensor (1111) is used for converting vibration energy of the surrounding environment into an alternating current output signal; the negative voltage converter unit (1112) and the active diode unit (1113) are used for rectifying the alternating current output signal into a direct current signal and transmitting the direct current signal to the voltage control module (113).

4. Laser treatment apparatus according to claim 3, wherein the negative pressure converter unit (1112) comprises a first NMOS transistor (N1), a second NMOS transistor (N2), a third NMOS transistor (N3), a fourth NMOS transistor (N4), a first PMOS transistor (P1) and a second PMOS transistor (P2),

the source electrode of the first NMOS tube (N1) and the gate electrode of the second NMOS tube (N2) are both connected to a first input end (Vin1), the source electrode of the second NMOS tube (N2) and the gate electrode of the first NMOS tube (N1) are connected to a second input end (Vin2), the drain electrode and the substrate of the first NMOS tube (N1) and the drain electrode and the substrate of the second NMOS tube (N2) are both connected to a ground end (GND);

the source electrode of the first PMOS tube (P1) and the gate electrode of the second PMOS tube (P2) are both connected to a first input end (Vin1), the source electrode of the second PMOS tube (P2) and the gate electrode of the first PMOS tube (P1) are connected to a second input end (Vin2), the substrate of the first PMOS tube (P1) is connected with the substrate of the second PMOS tube (P2), and the drain electrode of the first PMOS tube (P1) and the drain electrode of the second PMOS tube (P2) are both connected with a voltage output end (Vnvc);

the drain and the gate of the third NMOS transistor (N3) are connected with the voltage output end (Vnvc), the substrate is connected with the ground end, and the source is connected with the substrate of the second PMOS transistor (P2);

the source electrode and the substrate of the fourth NMOS tube (N4) are connected with a ground terminal (GND), and the drain electrode and the gate electrode are connected with the source electrode of the third NMOS tube (N3);

the first input (Vin1) and the second input (Vin2) are both connected to an output of the piezoelectric sensor (1111).

5. The laser therapeutic apparatus according to claim 3, wherein the active diode unit (1113) comprises a fifth NMOS transistor (N5), a sixth NMOS transistor (N6), a seventh NMOS transistor (N7), an eighth NMOS transistor (N8), a ninth NMOS transistor (N9), a tenth NMOS transistor (N10), a third PMOS transistor (P3), a fourth PMOS transistor (P4), a fifth PMOS transistor (P5), a sixth PMOS transistor (P6), a seventh PMOS transistor (P7), an eighth PMOS transistor (P8), a ninth PMOS transistor (P9), a tenth PMOS transistor (P10), an eleventh PMOS transistor (P11), a twelfth PMOS transistor (P12), and a thirteenth PMOS transistor (P13), wherein,

the source electrode and the substrate of the fifth NMOS transistor (N5), the source electrode and the substrate of the sixth NMOS transistor (N6), the source electrode and the substrate of the seventh NMOS transistor (N7), the source electrode and the substrate of the eighth NMOS transistor (N8), the source electrode and the substrate of the ninth NMOS transistor (N9), and the source electrode and the substrate of the tenth NMOS transistor (N10) are all connected to a ground terminal (GND);

a gate and a drain of the fifth NMOS transistor (N5) are both connected to a drain of the seventh PMOS transistor (P7), a gate and a drain of the sixth NMOS transistor (N6) are both connected to a drain of the ninth PMOS transistor (P9), a gate of the seventh NMOS transistor (N7) is connected to a gate of the sixth NMOS transistor (N6), a drain of the seventh NMOS transistor (N7) is connected to a drain of the tenth PMOS transistor (P10), a gate of the eighth NMOS transistor (N8) is connected to a drain of the seventh NMOS transistor (N7) and a gate of the eleventh PMOS transistor (P11), a drain of the eighth NMOS transistor (N8) is connected to a drain of the eleventh PMOS transistor (P11), a gate of the ninth NMOS transistor (N9) is connected to a drain of the eighth NMOS transistor (N8) and a drain of the twelfth PMOS transistor (P12), a gate of the ninth NMOS transistor (N356) is connected to a drain of the ninth PMOS transistor (N3527), and a drain of the twelfth PMOS transistor (N10) is connected to a drain of the twelfth PMOS transistor (N3527) P13), the drain of the tenth NMOS transistor (N10) is connected to the drain of the thirteenth PMOS transistor (P13);

a source and a substrate of the seventh PMOS transistor (P7), a source and a substrate of the eighth PMOS transistor (P8), a substrate of the ninth PMOS transistor (P9) are both connected to the negative voltage converter unit (1112), a gate of the seventh PMOS transistor (P7) and a gate of the eighth PMOS transistor (P8) are both connected to a drain of the seventh PMOS transistor (P7), a drain of the eighth PMOS transistor (P8) is connected to a source of the ninth PMOS transistor (P9), a gate of the ninth PMOS transistor (P9) and a gate of the tenth PMOS transistor (P10) are both connected to a ground terminal (GND), and a source of the tenth PMOS transistor (P10) is connected to a drain of the eighth PMOS transistor (P8);

the substrate of the tenth PMOS tube (P10), the source electrode and the substrate of an eleventh PMOS tube (P11), the source electrode and the substrate of a twelfth PMOS tube (P12) and the source electrode and the substrate of a thirteenth PMOS tube (P13) are all connected to the voltage control module (113);

the grid electrode of the sixth PMOS tube (P6) is connected to the drain electrode of a thirteenth PMOS tube (P13), the source electrode of the sixth PMOS tube (P6) is connected with the negative voltage converter unit (1112), and the drain electrode of the sixth PMOS tube (P6) is connected with the voltage control module (113);

the source electrode of the third PMOS tube (P3), the grid electrode of the fifth PMOS tube (P5) and the source electrode of the fourth PMOS tube (P4) are all connected to the negative voltage converter unit (1112);

the grid electrode and the drain electrode of the third PMOS tube (P3), the grid electrode of the fourth PMOS tube (P4) and the source electrode of the fifth PMOS tube (P5) are all connected to the voltage control module (113);

the substrate and the drain of the third PMOS tube (P3), the substrate and the drain of the fourth PMOS tube (P4), and the substrate and the drain of the fifth PMOS tube (P5) are all connected to the substrate of the sixth PMOS tube (P6).

6. Laser treatment apparatus according to claim 2, characterized in that the thermo electric module (112) comprises a thermo electric sensor (1121), an activation circuit (1122), a storage circuit (1123), a mechanical switch (K), a first capacitor (C1) and a second capacitor (C2), wherein,

the thermoelectric sensor (1121) is connected with the starting circuit (1122) and the storage circuit (1123) and is used for converting the heat energy of the surrounding environment into an electric signal;

the starting circuit (1122) is connected with the storage circuit (1123) and used for providing a power supply voltage for the storage circuit (1123);

the mechanical switch (K) is connected between the starting circuit (1122) and a Ground (GND) for starting the thermoelectric module (112);

the storage circuit (1123) is connected with the voltage control module (113) and is used for acquiring and storing the electric signal from the thermoelectric sensor (1121) and providing voltage for the voltage control module (113);

the first capacitor (C1) is connected between the output terminal of the start-up circuit (1122) and Ground (GND), and the second capacitor (C2) is connected between the output terminal of the memory circuit (1123) and Ground (GND).

7. The therapeutic laser device according to claim 6, wherein the start circuit (1122) comprises a first resistor (R1), an inductor (L), a fourteenth PMOS transistor (P14), an eleventh NMOS transistor (N11), a first reference voltage source (U1), a second resistor (R2), a third resistor (R3), a third capacitor (C3), and a dynamic comparator (Comp),

the first resistor (R1) and the inductor (L) are connected in series between the output end of the pyroelectric sensor (1121) and the source electrode of the fourteenth PMOS tube (P14), and the grid electrode and the drain electrode of the fourteenth PMOS tube (P14) are both connected to the input end of the storage circuit (1123);

the source of the eleventh NMOS transistor (N11) is connected to the Ground (GND), the gate is connected to the output terminal of the dynamic comparator (Comp), and the drain is connected to the node between the inductor (L) and the source of the fourteenth PMOS transistor (P14) and to the mechanical switch (K);

the first reference voltage source (U1) is connected between the drain of the fourteenth PMOS tube (P14) and the negative input terminal of the dynamic comparator (Comp); the second resistor (R2) and the third resistor (R3) are connected in series between the drain of the fourteenth PMOS tube (P14) and the ground terminal, and the third capacitor (C3) is connected in parallel with the third resistor (R3);

the positive input of the dynamic comparator (Comp) is connected between the second resistor (R2) and the third resistor (R3).

8. A laser treatment apparatus according to claim 7, characterized in that the start-up circuit (1122) further comprises an oscillator (B), wherein the input terminal of the oscillator (B) is connected to the drain of the fourteenth PMOS transistor (P14), and the output terminal of the oscillator (B) is connected to the clock terminal of the dynamic comparator (Comp).

9. Laser treatment apparatus according to any of claims 1 to 8, characterized in that the voltage control module (113) comprises a second reference voltage source (U2), a charging control unit (CONT), a fifteenth PMOS tube (P15), an error amplifier (H1), a fourth resistor (R4), a fifth resistor (R5) and a fourth capacitor (C4), wherein,

the input end of the second reference voltage source (U2) is respectively connected with the source electrode of the fifteenth PMOS tube (P15), the first input end of the charging control module (CONT), the output end of the piezoelectric module (111) and the output end of the thermoelectric module (112), and the output end of the second reference voltage source (U2) is connected with the negative input end of the error amplifier (H1);

the substrate of the fifteenth PMOS tube (P15) is connected with the source electrode thereof, the grid electrode thereof is connected with the output end of the charging control module (CONT), and the drain electrode thereof is used as the output end (Vout3) of the voltage control module (113);

the fourth resistor (R4) and the fifth resistor (R5) are connected in series between the drain of the fifteenth PMOS transistor (P15) and the Ground (GND), and the fourth capacitor (C4) is connected between the drain of the fifteenth PMOS transistor (P15) and the Ground (GND);

a positive input of the error amplifier (H1) is connected at a node between the fourth resistor (R4) and the fifth resistor (R5), and an output of the error amplifier (H1) is connected to a second input of the charging control unit (CONT); a third input end of the charging control unit (CONT) is connected to the drain of the fifteenth PMOS transistor (P15).

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a laser therapeutic apparatus.

Background

In recent years, lasers have been widely used in real life, and particularly, a series of lasers including semiconductor lasers and the like have light weight, small volume and low driving energy, so that the lasers have wide application prospects in the fields of optical communication, military engineering, biomedical treatment and the like. In the biomedical field, typical applications include laser fiber in vivo irradiation, laser clearing arterial vessel occlusion, and the like.

The power supply technology of laser therapeutic equipment belongs to the core portion of laser technology, and the working stability and service life of the laser therapeutic equipment are directly related to its driving power supply. In actual operation, a high-power switching power supply generally supplies power to the laser in a pulse mode, and the laser emits light in a pulse mode to form pulse laser. The high-energy pulse laser generated by the laser is transmitted out through the optical fiber, the optical fiber enters the human body through the optical fiber, the energy of the laser can be transmitted into the part needing to be treated by the laser, and effective and safe treatment is carried out on a patient through strictly controlling the light-emitting parameters of the laser.

At present, most laser therapy apparatuses are large in size, need a fixed power supply to be electrified or charged, are inconvenient to carry, are high in cost, cannot meet the requirements for quickly diagnosing and treating patients, and cannot acquire electric energy anytime and anywhere to prolong the power supply time of the apparatus. In addition, there are some lasers, and for convenience of treatment and carrying, the system power supply is performed by matching the external adapter power supply with a built-in power supply system (e.g., a built-in battery and a power management circuit). However, the power supply duration of the current medical laser therapeutic apparatus is not ideal, the design of the built-in power management system is not perfect, and particularly when the power supply of the external adapter is difficult, the power supply duration is more unsatisfactory, which greatly limits the wide popularization of the medical laser therapeutic apparatus.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a laser therapeutic apparatus. The technical problem to be solved by the invention is realized by the following technical scheme:

the invention provides a laser therapeutic apparatus, which comprises a laser and a therapeutic optical fiber, wherein,

the treatment optical fiber is connected to the laser, and the laser is driven to emit light;

the laser comprises an energy acquisition power supply, a processor, a laser output circuit, an input control circuit and a laser light source; the processor is electrically connected with the input control circuit and the laser output circuit and is used for controlling the laser output circuit to output laser with set laser working mode, wavelength, set time and set energy according to a control instruction input by the input control circuit; the laser output circuit is electrically connected with the laser light source and is used for controlling the light emitting intensity and the light emitting duration of the laser light source; the energy acquisition power supply is electrically connected with the laser output circuit and is used for converting vibration or heat energy into electric energy and providing driving current for the laser output circuit.

In one embodiment of the invention, the energy harvesting power source comprises a piezoelectric module, a thermoelectric module, a voltage control module, and a rechargeable battery, the piezoelectric module and the thermoelectric module each being connected to the voltage control module, wherein,

the piezoelectric module is used for acquiring vibration energy and converting the vibration energy into electric energy; the thermoelectric module is used for acquiring heat energy and converting the heat energy into electric energy; the voltage control module is used for receiving electric energy from the piezoelectric module and the thermoelectric module and generating stable output voltage; the rechargeable battery is used for storing electric energy.

In one embodiment of the present invention, the piezoelectric module includes a piezoelectric sensor, a negative pressure transducer unit, and an active diode unit, which are connected in sequence, wherein,

the piezoelectric sensor is used for converting vibration energy of the surrounding environment into an alternating current output signal; the negative voltage converter unit and the active diode unit are used for rectifying the alternating current output signal into a direct current signal and transmitting the direct current signal to the voltage control module.

In one embodiment of the present invention, the negative voltage converter unit includes a first NMOS transistor, a second NMOS transistor, a third NMOS transistor, a fourth NMOS transistor, a first PMOS transistor, and a second PMOS transistor, wherein,

the source electrode of the first NMOS tube and the grid electrode of the second NMOS tube are connected to a first input end, the source electrode of the second NMOS tube and the grid electrode of the first NMOS tube are connected to a second input end, and the drain electrode and the substrate of the first NMOS tube and the drain electrode and the substrate of the second NMOS tube are connected to a ground terminal;

the source electrode of the first PMOS tube and the grid electrode of the second PMOS tube are both connected to a first input end, the source electrode of the second PMOS tube and the grid electrode of the first PMOS tube are connected to a second input end, the substrate of the first PMOS tube is connected with the substrate of the second PMOS tube, and the drain electrode of the first PMOS tube and the drain electrode of the second PMOS tube are both connected with a voltage output end;

the drain electrode and the grid electrode of the third NMOS tube are connected with the voltage output end, the substrate is connected with the grounding end, and the source electrode is connected with the substrate of the second PMOS tube;

the source electrode and the substrate of the fourth NMOS tube are connected with a grounding end, and the drain electrode and the grid electrode of the fourth NMOS tube are connected with the source electrode of the third NMOS tube;

the first input and the second input are both connected to an output of the piezoelectric sensor.

In one embodiment of the present invention, the active diode unit includes a fifth NMOS transistor, a sixth NMOS transistor, a seventh NMOS transistor, an eighth NMOS transistor, a ninth NMOS transistor, a tenth NMOS transistor, a third PMOS transistor, a fourth PMOS transistor, a fifth PMOS transistor, a sixth PMOS transistor, a seventh PMOS transistor, an eighth PMOS transistor, a ninth PMOS transistor, a tenth PMOS transistor, an eleventh PMOS transistor, a twelfth PMOS transistor, and a thirteenth PMOS transistor, wherein,

the source electrode and the substrate of the fifth NMOS transistor, the source electrode and the substrate of the sixth NMOS transistor, the source electrode and the substrate of the seventh NMOS transistor, the source electrode and the substrate of the eighth NMOS transistor, the source electrode and the substrate of the ninth NMOS transistor, and the source electrode and the substrate of the tenth NMOS transistor are all connected to a ground terminal;

the grid electrode and the drain electrode of the fifth NMOS tube are both connected with the drain electrode of the seventh PMOS tube, the grid electrode and the drain electrode of the sixth NMOS tube are both connected with the drain electrode of the ninth PMOS tube, the grid electrode of the seventh NMOS tube is connected with the grid electrode of the sixth NMOS tube, the drain electrode of the seventh NMOS tube is connected with the drain electrode of the tenth PMOS tube, the grid electrode of the eighth NMOS tube is connected with the drain electrode of the seventh NMOS tube and the grid electrode of the eleventh PMOS tube, the drain electrode of the eighth NMOS tube is connected with the drain electrode of the eleventh PMOS tube, the grid electrode of the ninth NMOS tube is connected with the drain electrode of the eighth NMOS tube and the grid electrode of the twelfth PMOS tube, the drain electrode of the ninth NMOS tube is connected with the drain electrode of the twelfth PMOS tube, the grid electrode of the tenth NMOS tube is connected with the drain electrode of the ninth NMOS tube and the grid electrode of the thirteenth tube, and the drain electrode of the tenth NMOS tube is connected with the drain electrode of the thirteenth PMOS tube;

the source electrode and the substrate of the seventh PMOS tube, the source electrode and the substrate of the eighth PMOS tube, and the substrate of the ninth PMOS tube are both connected to the negative pressure converter unit, the gate electrode of the seventh PMOS tube and the gate electrode of the eighth PMOS tube are both connected to the drain electrode of the seventh PMOS tube, the drain electrode of the eighth PMOS tube is connected to the source electrode of the ninth PMOS tube, the gate electrode of the ninth PMOS tube and the gate electrode of the tenth PMOS tube are both connected to the ground terminal, and the source electrode of the tenth PMOS tube is connected to the drain electrode of the eighth PMOS tube;

the substrate of the tenth PMOS tube, the source electrode and the substrate of the eleventh PMOS tube, the source electrode and the substrate of the twelfth PMOS tube and the source electrode and the substrate of the thirteenth PMOS tube are connected to the voltage control module;

the grid electrode of the sixth PMOS tube is connected to the drain electrode of the thirteenth PMOS tube, the source electrode of the sixth PMOS tube is connected with the negative pressure converter unit, and the drain electrode of the sixth PMOS tube is connected to the voltage control module;

the source electrode of the third PMOS tube, the grid electrode of the fifth PMOS tube and the source electrode of the fourth PMOS tube are connected to the negative pressure converter unit;

the grid electrode and the drain electrode of the third PMOS tube, the grid electrode of the fourth PMOS tube and the source electrode of the fifth PMOS tube are connected to the voltage control module;

the substrate and the drain of the third PMOS tube, the substrate and the drain of the fourth PMOS tube, and the substrate and the drain of the fifth PMOS tube are all connected to the substrate of the sixth PMOS tube.

In one embodiment of the invention, the thermoelectric module comprises a thermoelectric sensor, an activation circuit, a storage circuit, a mechanical switch, a first capacitance, and a second capacitance, wherein,

the thermoelectric sensor is connected with the starting circuit and the storage circuit and is used for converting the heat energy of the surrounding environment into an electric signal;

the starting circuit is connected with the storage circuit and is used for providing power supply voltage for the storage circuit;

the mechanical switch is connected between the starting circuit and a grounding end and used for starting the thermoelectric module;

the storage circuit is connected with the voltage control module and is used for acquiring and storing the electric signal from the thermoelectric sensor and providing voltage for the voltage control module;

the first capacitor is connected between the output end of the starting circuit and the grounding end, and the second capacitor is connected between the output end of the storage circuit and the grounding end.

In one embodiment of the present invention, the start-up circuit includes a first resistor, an inductor, a fourteenth PMOS transistor, an eleventh NMOS transistor, a first reference voltage source, a second resistor, a third capacitor, and a dynamic comparator,

the first resistor and the inductor are connected in series between the output end of the pyroelectric sensor and the source electrode of the fourteenth PMOS tube, and the grid electrode and the drain electrode of the fourteenth PMOS tube are both connected to the input end of the storage circuit;

the source electrode of the eleventh NMOS tube is connected with the ground end, the grid electrode of the eleventh NMOS tube is connected with the output end of the dynamic comparator, and the drain electrode of the eleventh NMOS tube is connected with a node between the inductor and the source electrode of the fourteenth PMOS tube and is connected with the mechanical switch;

the first reference voltage source is connected between the drain electrode of the fourteenth PMOS tube and the negative input end of the dynamic comparator; the second resistor and the third resistor are connected in series between the drain of the fourteenth PMOS tube and a ground terminal, and the third capacitor is connected in parallel with the third resistor;

a positive input of the dynamic comparator is connected between the second resistor and the third resistor.

In an embodiment of the present invention, the start-up circuit further includes an oscillator, an input terminal of the oscillator is connected to the drain of the fourteenth PMOS transistor, and an output terminal of the oscillator is connected to the clock terminal of the dynamic comparator.

In one embodiment of the present invention, the voltage control module includes a second reference voltage source, a charge control unit, a fifteenth PMOS transistor, an error amplifier, a fourth resistor, a fifth resistor, and a fourth capacitor, wherein,

the input end of the second reference voltage source is respectively connected with the source electrode of the fifteenth PMOS tube, the first input end of the charging control module, the output end of the piezoelectric module and the output end of the thermoelectric module, and the output end of the second reference voltage source is connected with the negative input end of the error amplifier;

the substrate of the fifteenth PMOS tube is connected with the source electrode of the fifteenth PMOS tube, the grid electrode of the fifteenth PMOS tube is connected with the output end of the charging control module, and the drain electrode of the fifteenth PMOS tube is used as the output end of the voltage control module;

the fourth resistor and the fifth resistor are connected in series between the drain of the fifteenth PMOS tube and the ground terminal, and the fourth capacitor is connected between the drain of the fifteenth PMOS tube and the ground terminal;

the positive input end of the error amplifier is connected to a node between the fourth resistor and the fifth resistor, and the output end of the error amplifier is connected to the second input end of the charging control unit; a third input end of the charging control unit is connected to a drain electrode of the fifteenth PMOS transistor.

Compared with the prior art, the invention has the beneficial effects that:

1. the laser therapeutic apparatus provided by the invention is provided with the piezoelectric module and the thermoelectric module, can convert vibration and heat energy in the surrounding environment into electric energy to supply power to the apparatus, realizes self power supply, saves electric energy, prolongs power supply time and is convenient to carry.

2. The laser therapeutic instrument adopts an active diode unit as a switch in a piezoelectric module, the alternating current output signal is rectified into a direct current signal, the voltage of a front-stage circuit is greater than the voltage of a rear-end load, and a PMOS (P-channel metal oxide semiconductor) tube in the active diode unit is conducted to charge the load; when the rear end load voltage is larger than the front stage circuit, the PMOS tube is turned off, and the conduction voltage drop of the PMOS tube is almost zero, so that the energy loss in the conduction process is effectively reduced.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

FIG. 1 is a schematic view of a laser treatment apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a treatment fiber according to an embodiment of the present invention;

FIG. 3 is a block diagram of an energy harvesting power supply according to an embodiment of the present invention;

fig. 4 is a schematic circuit structure diagram of a laser output circuit according to an embodiment of the present invention;

fig. 5 is a schematic circuit structure diagram of a laser driving circuit according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a piezoelectric module according to an embodiment of the present invention;

fig. 7 is a circuit diagram of a negative voltage converting unit according to an embodiment of the present invention;

fig. 8 is a circuit diagram of an active diode unit according to an embodiment of the present invention;

fig. 9 is an equivalent circuit diagram of an active diode unit according to an embodiment of the present invention;

FIG. 10 is a schematic view of a thermoelectric module according to an embodiment of the present invention;

fig. 11 is a circuit diagram of a start-up circuit according to an embodiment of the present invention;

fig. 12 is a circuit diagram of a voltage control module according to an embodiment of the present invention.

Detailed Description

In order to further explain the technical means and effects of the present invention adopted to achieve the predetermined objects, a laser therapeutic apparatus according to the present invention will be described in detail with reference to the accompanying drawings and the detailed description.

The foregoing and other technical matters, features and effects of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings. The technical means and effects of the present invention adopted to achieve the predetermined purpose can be more deeply and specifically understood through the description of the specific embodiments, however, the attached drawings are provided for reference and description only and are not used for limiting the technical scheme of the present invention.