CN110585605A - Laser therapeutic instrument - Google Patents
Laser therapeutic instrument Download PDFInfo
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- CN110585605A CN110585605A CN201910959743.4A CN201910959743A CN110585605A CN 110585605 A CN110585605 A CN 110585605A CN 201910959743 A CN201910959743 A CN 201910959743A CN 110585605 A CN110585605 A CN 110585605A
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- 230000001225 therapeutic effect Effects 0.000 title claims abstract description 34
- 239000013307 optical fiber Substances 0.000 claims abstract description 23
- 239000000758 substrate Substances 0.000 claims description 75
- 239000003990 capacitor Substances 0.000 claims description 27
- 238000011282 treatment Methods 0.000 claims description 9
- 238000013532 laser treatment Methods 0.000 claims description 7
- 101100112673 Rattus norvegicus Ccnd2 gene Proteins 0.000 claims description 6
- 238000003306 harvesting Methods 0.000 claims description 6
- 230000004913 activation Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 22
- 239000000835 fiber Substances 0.000 description 12
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000003071 parasitic effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 101100263704 Arabidopsis thaliana VIN3 gene Proteins 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 238000002647 laser therapy Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N5/0601—Apparatus for use inside the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N5/067—Radiation therapy using light using laser light
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N11/00—Generators or motors not provided for elsewhere; Alleged perpetua mobilia obtained by electric or magnetic means
- H02N11/002—Generators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
- H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
- H02N2/18—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing electrical output from mechanical input, e.g. generators
- H02N2/186—Vibration harvesters
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/06—Modifications for ensuring a fully conducting state
- H03K17/063—Modifications for ensuring a fully conducting state in field-effect transistor switches
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
- A61N5/0601—Apparatus for use inside the body
- A61N2005/0602—Apparatus for use inside the body for treatment of blood vessels
Abstract
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.
Description
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.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a laser therapeutic apparatus according to an embodiment of the present invention. The laser therapeutic apparatus comprises a laser 1 and a therapeutic optical fiber 2, wherein the therapeutic 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 to the input control circuit 14 and the laser output circuit 13, and is configured to control the laser output circuit 13 to output laser with a set laser operating mode, a set wavelength, a set time, and a 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 thermal energy into electric energy and providing driving current for the laser output circuit 13.
The treatment fiber 2 is intended to be surgically implanted in the patient for irradiation and repair treatment of the site to be treated, and subsequently removed post-operatively. Specifically, referring to fig. 2, fig. 2 is a schematic structural diagram of a therapeutic optical fiber according to an embodiment of the present invention. The treatment optical fiber 2 of the present embodiment includes a plurality of laser optical fibers 21 of a predetermined length, a plurality of optical fiber connection assemblies 22, an optical fiber guide structure 23, and an optical fiber controller 24; the laser fibers 21 are sequentially connected through the fiber connecting assembly 22 to form a concatenated fiber structure 25, one end of the concatenated fiber structure 25 is connected with the fiber guiding structure 23, and the other end of the concatenated fiber structure is connected with the fiber controller 24; each optical fiber connecting assembly 22 is provided with a pressure sensor 26, the pressure sensor 26 is connected with the optical fiber controller 24, the pressure sensor 26 is used for detecting pressure data of the optical fiber connecting assembly 22, and the optical fiber controller 24 is used for judging the coupling state of the medical optical fiber according to the pressure data. The optical fiber controller can be a control chip such as an MCU, and the like, as long as the receiving, sending, displaying and alarming of data can be realized.
Further, the laser 1 further includes an LCD touch display screen (not shown in the drawings), which is electrically connected to the input control circuit 14, and is used for receiving a control instruction from a user and displaying the current working state of the laser.
Next, referring to fig. 3, fig. 3 is a block diagram of an energy harvesting power supply according to an embodiment of the present invention. The energy obtaining power supply 11 of the present embodiment includes a piezoelectric module 111, a thermoelectric module 112, a voltage control module 113 and a rechargeable battery 114, wherein the piezoelectric module 111 and the thermoelectric module 112 are both connected to the voltage control module 113, and the piezoelectric module 111 is used for obtaining vibration energy and converting the vibration energy into electric energy; thermoelectric module 112 is used for obtaining heat energy and converting the heat energy into electric energy; the voltage control module 113 is used for receiving the electric energy from the piezoelectric module 111 and the thermoelectric module 112 and generating a stable output voltage; a rechargeable battery 114 is used to store electrical energy and to power the other components of the laser 1.
The processor 12 may be a microcontroller MCU, a single chip, or a programmable logic controller FPGA or other device having a processing function.
Referring to fig. 4, fig. 4 is a schematic circuit structure diagram of a laser output circuit according to an embodiment of the present invention. The laser output circuit 13 includes a power supply control circuit 131 and a laser drive circuit 132; the power control circuit 131 is electrically connected to the processor 12, the energy obtaining power source 11, and the laser driving circuit 132, and is configured to convert a rated voltage output by the energy obtaining power source 11 into a required constant driving current according to a control instruction of the processor 12, and output the driving current to the laser driving circuit 132 to drive the laser driving circuit 132 to operate; the laser driving circuit 132 is electrically connected to the laser light source 15, and is configured to control the light emitting intensity and the light emitting duration of the laser light source 15.
Referring to fig. 5, fig. 5 is a schematic circuit structure diagram of a laser driving circuit according to an embodiment of the present invention. The laser driving circuit 132 includes a pulse generating unit 1321, a pulse shaping unit 1322, a power amplifying unit 1323, and a protection unit 1324; the pulse generating unit 1321, the pulse shaping unit 1322, the power amplifying unit 1323 and the therapeutic fiber 2 are electrically connected in series in sequence, and the protection unit 1324 is connected in parallel to a node where the power amplifying unit 1323 and the therapeutic fiber 2 are connected in series.
In addition, the laser therapeutic apparatus can also comprise a laser protection system which is used for timing feedback and closing the laser 1 when abnormal through real-time monitoring and early warning of temperature, current and optical power, so that the safety of the laser 1 and a patient is ensured.
The laser therapeutic apparatus of the embodiment is provided with the piezoelectric module and the thermoelectric module, and can convert vibration and heat energy in the surrounding environment into electric energy and store the generated electric energy into the rechargeable battery so as to supply power to the apparatus, so that self-power supply is realized, the electric energy is saved, the power supply time is prolonged, and the laser therapeutic apparatus is convenient to carry.
Example two
On the basis of the above embodiments, the present embodiment will describe in detail the specific structure of the energy acquisition module.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a piezoelectric module according to an embodiment of the present invention. The piezoelectric module 111 of the present embodiment includes a piezoelectric sensor 1111, a negative voltage converter unit 1112, and an active diode unit 1113, which are connected in sequence, wherein the piezoelectric sensor 1111 is used to convert vibration energy of the surrounding environment into an ac output signal, and the piezoelectric sensor 1111 can be fixed on a vibrating object or a human body to convert the vibration energy into electric energy for charging the rechargeable battery 114. Specifically, the piezoelectric sensor 1111 converts the vibration energy of the surrounding environment into an ac output signal, and is generally equivalent to a model in which a sinusoidal current source, a parasitic capacitor, and a parasitic resistor are connected in parallel. The negative voltage converter unit 1112 and the active diode unit 1113 are configured to rectify the ac output signal into a dc signal and transmit the dc signal to the voltage control module 113. Specifically, the negative voltage converter unit 1112 converts a negative component in the ac output signal into a positive component. The active diode unit 1113 plays a role of a switch, the voltage of the current-stage circuit is greater than the load voltage, and the MOS tube is conducted to charge the load; when the load voltage is larger than the front-stage circuit, the MOS tube is turned off.
Further, referring to fig. 7, fig. 7 is a circuit diagram of a negative voltage converting unit according to an embodiment of the present invention. The negative voltage converter unit 1112 of the present embodiment includes 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, wherein a source of the first NMOS transistor N1 and a gate of the second NMOS transistor N2 are both connected to the first input terminal Vin1, a source of the second NMOS transistor N2 and a gate of the first NMOS transistor N1 are connected to the second input terminal Vin2, and a drain and a substrate of the first NMOS transistor N1 and a drain and a substrate of the second NMOS transistor N2 are both connected to the ground terminal GND; the source electrode of the first PMOS tube P1 and the grid electrode of the second PMOS tube P2 are both connected to the first input end Vin1, the source electrode of the second PMOS tube P2 and the grid electrode of the first PMOS tube P1 are connected to the second input end Vin2, the substrate of the first PMOS tube P1 is connected to 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 to the 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 terminal, 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 end GND, and the drain electrode and the grid electrode are connected with the source electrode of the third NMOS tube N3; the first input terminal Vin1 and the second input terminal Vin2 are both connected to the output terminal of the piezoelectric sensor 1111.
Further, referring to fig. 8, fig. 8 is a circuit diagram of an active diode unit according to an embodiment of the present invention. The active diode unit 1113 of this embodiment includes 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 a source and a substrate of the fifth NMOS transistor N5, a source and a substrate of the sixth NMOS transistor N6, a source and a substrate of the seventh NMOS transistor N7, a source and a substrate of the eighth NMOS transistor N8, a source and a substrate of the ninth NMOS transistor N9, and a source and a substrate of the tenth NMOS transistor N10 are all connected to a GND terminal; the grid and the drain of a fifth NMOS transistor N5 are both connected with the drain of a seventh PMOS transistor P7, the grid and the drain of a sixth NMOS transistor N6 are both connected with the drain of a ninth PMOS transistor P9, the grid of a seventh NMOS transistor N7 is connected with the grid of a sixth NMOS transistor N6, the drain of a seventh NMOS transistor N7 is connected with the drain of a tenth PMOS transistor P10, the grid of an eighth NMOS transistor N8 is connected with the drain of a seventh NMOS transistor N7 and the grid of an eleventh PMOS transistor P11, the drain of an eighth NMOS transistor N8 is connected with the drain of an eleventh PMOS transistor P11, the grid of a ninth NMOS transistor N9 is connected with the drain of an eighth NMOS transistor N8 and the grid of a twelfth PMOS transistor P12, the drain of a ninth NMOS transistor N9 is connected with the drain of a twelfth PMOS transistor P12, the grid of a tenth NMOS transistor N10 is connected with the drain of a ninth NMOS transistor N9 and the drain of a thirteenth PMOS P13, and the drain of a thirteenth NMOS 10 is connected with 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 all 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 all 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 the ground 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 transistor P10, the source and the substrate of the eleventh PMOS transistor P11, the source and the substrate of the twelfth PMOS transistor P12, and the source and the substrate of the thirteenth PMOS transistor P13 are all connected to the voltage control module 113; the gate of the sixth PMOS transistor P6 is connected to the drain of the thirteenth PMOS transistor P13, the source of the sixth PMOS transistor P6 is connected to the negative voltage converter unit 1112, and the drain of the sixth PMOS transistor P6 is connected to the voltage control module 113; the source of the third PMOS transistor P3, the gate of the fifth PMOS transistor P5, and the source of the fourth PMOS transistor P4 are all connected to the negative voltage converter unit 1112; the gate and the drain of the third PMOS transistor P3, the gate of the fourth PMOS transistor P4, and the source of the fifth PMOS transistor P5 are all connected to the voltage control module 113; the substrate of the third PMOS transistor P3, the substrate and the drain of the fourth PMOS transistor P4, and the substrate and the drain of the fifth PMOS transistor P5 are all connected to the substrate of the sixth PMOS transistor P6.
Fig. 9 is an equivalent circuit diagram of an active diode unit according to an embodiment of the present invention. As shown, the active diode unit 1113 may be equivalent to a PMOS transistor and a comparator, wherein the gate of the PMOS transistor is connected to the output terminal of the comparator, and the source and the drain of the PMOS transistor are respectively connected to the positive input terminal and the negative input terminal of the comparator. When the voltage of the front-stage circuit is greater than the voltage of the rear-end load, the PMOS 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.
Further, referring to fig. 10, fig. 10 is a schematic structural diagram of a thermoelectric module according to an embodiment of the present invention. The thermoelectric module 112 comprises a thermoelectric sensor 1121, a starting 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 to the starting circuit 1122 and the storage circuit 1123 and is used for converting the thermal energy of the surrounding environment into an electrical signal. In this embodiment, the pyroelectric sensor 1121 may be fixed to a human body or any other object having a temperature difference with the ambient temperature, so as to convert the thermal energy in the surrounding environment into electric energy for charging the rechargeable battery 114. The starting circuit 1122 is connected with the storage circuit 1123 and is used for providing a power supply voltage for the storage circuit 1123; the mechanical switch K is connected between the start circuit 1122 and the ground GND, and is used for starting the thermoelectric module 112; the storage circuit 1123 is connected to the voltage control module 113, and is configured to obtain and store the electrical signal from the pyroelectric sensor 1121, and provide a voltage for the voltage control module 113; the first capacitor C1 is connected between the output terminal of the start-up circuit 1122 and the ground GND, and the second capacitor C2 is connected between the output terminal of the memory circuit 1123 and the ground GND.
Specifically, the pyroelectric sensor 1121 can be generally equivalent to a voltage source with an internal resistor, and generates the voltage signal VIN 3. The starting circuit 1122 is configured to receive the obtained voltage signal VIN3, determine whether the voltage value thereof meets the standard for supplying power to the internal circuit after the voltage boosting process, and provide a power supply voltage for the storage circuit 1123, so as to start the storage circuit to store the electric energy generated by the thermoelectric sensor 1121, and provide a voltage Vout2 for the subsequent circuit.
Further, referring to fig. 11, fig. 11 is a circuit diagram of a start-up circuit according to an embodiment of the present invention. The start-up circuit 1122 includes 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, wherein the first resistor R1 and the inductor L are connected in series between the output terminal of the pyroelectric sensor 1121 and the source of the fourteenth PMOS transistor P14, and the gate and the drain of the fourteenth PMOS transistor P14 are both connected to the input terminal 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 transistor 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 transistor 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.
Further, the start-up circuit 1122 further includes an oscillator B, an input terminal of the oscillator B is connected to the drain of the fourteenth PMOS transistor P14, and an output terminal of the oscillator B is connected to the clock terminal of the dynamic comparator Comp.
Specifically, the mechanical switch K is used to control the initial operation mode of the thermoelectric module 112 to be turned on, for example, in case that the piezoelectric module 111 is short or intermittent in energy harvesting, the thermoelectric harvesting mode may be started through the mechanical switch K. The main working principle is as follows: when the mechanical switch K is turned on, thermoelectrically acquired energy flows through the inductor L in the form of current, and when the mechanical switch K is turned off, the inductor current forces the fourteenth PMOS tube P14 to be turned on to charge the first capacitor C1 so as to obtain a voltage VDD：
Wherein R is the equivalent internal resistance of the thermoelectric sensor, the thermoelectric acquisition source, RSWIs the equivalent resistance of the active diode unit. Through the above formula, it can be found that the required supply voltage V can be obtained by reasonably designing the size of the resistor and the capacitorDDGeneration of VDDFor starting an oscillator B generating a corresponding clock signal and a first reference voltage source U1, the first reference voltage source U1 generating a reference voltage VDDA self-powered effect is achieved. The dynamic comparator Comp is used to detect the input signal when V is derived from the input signalDDWhen the starting voltage is lower than the required starting voltage of the subsequent instrument, the thermoelectric energy is controlled to be obtained again by the enabling control signal.
It should be noted that the structure of the storage circuit 1123 is the same as that of the start circuit 1122, except that the second capacitor C2 connected thereto is a super capacitor, and therefore, the description thereof is omitted.
Further, referring to fig. 12, fig. 12 is a circuit diagram of a voltage control module according to an embodiment of the present invention. The voltage control module 113 includes a second reference voltage source U2, a charging control unit CONT, a fifteenth PMOS transistor P15, an error amplifier H1, a fourth resistor R4, a fifth resistor R5, and a fourth capacitor C4, wherein an input end of the second reference voltage source U2 is connected to a source of the fifteenth PMOS transistor P15, a first input end of the charging control module CONT, an output end of the piezoelectric module 111, and an output end of the thermoelectric module 112, respectively, and an output end of the second reference voltage source U2 is connected to a negative input end of the error amplifier H1; the substrate of the fifteenth PMOS transistor P15 is connected to the source thereof, the gate thereof is connected to the output terminal of the charging control module CONT, and the drain thereof is used as the output terminal 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 end of the error amplifier H1 is connected to a node between the fourth resistor R4 and the fifth resistor R5, and an output end of the error amplifier H1 is connected to a second input end 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.
Specifically, the second reference voltage source U2 is used to generate a reference voltage Vref, the error amplifier H1 is used to amplify the difference between the output voltages from the piezoelectric module 111 and the thermoelectric module 112 and the reference voltage Vref, and the charge control unit CONT is a logic circuit that controls the turn-on time of the fifteenth PMOS transistor according to the output value of the error amplifier H1, thereby controlling the magnitude of the output voltage Vout 3. Here, the drain of the fifteenth PMOS transistor P15 is connected to the input terminal of the rechargeable battery 114 as the output terminal Vout3 of the voltage control module 113, and provides a stable voltage signal to the rechargeable battery 114, so as to improve the power supply time of the rechargeable battery 114, and save energy by converting thermal energy and vibration energy in the environment into electric energy in real time and storing the electric energy in the rechargeable battery 114.
The laser therapeutic apparatus of the embodiment is provided with the piezoelectric module and the thermoelectric module, and can convert vibration and heat energy in the surrounding environment into electric energy to supply power to the apparatus, so that self-power supply is realized, the electric energy is saved, the power supply time is prolonged, and the laser therapeutic apparatus is convenient to carry. In addition, the laser therapeutic apparatus 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 foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details.
Claims (9)
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).
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Application publication date: 20191220 |