CN213407498U - Infrared therapeutic apparatus and control circuit thereof - Google Patents
Infrared therapeutic apparatus and control circuit thereof Download PDFInfo
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- CN213407498U CN213407498U CN202021570303.4U CN202021570303U CN213407498U CN 213407498 U CN213407498 U CN 213407498U CN 202021570303 U CN202021570303 U CN 202021570303U CN 213407498 U CN213407498 U CN 213407498U
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Abstract
The utility model discloses an infrared therapeutic apparatus and a control circuit thereof, the control circuit of the infrared therapeutic apparatus comprises a power module, a control module and a radiation source drive circuit, wherein, the radiation source drive circuit comprises a first switch device and a second switch device, the second switch device receives the control signal output by the control module and is switched on and off under the control of the control signal; the first switch device receives the voltage output by the power supply module, and the first switch device receives the signal output by the second switch device and changes the on-off state according to the on-off state change of the second switch device. The infrared therapeutic apparatus comprises the control circuit and a radiation source. The utility model discloses can satisfy the electronic component interconnection communication of two different rated voltages to infrared therapeutic instrument's control circuit simple structure, it is fast to the response speed of the PWM signal of control module output.
Description
Technical Field
The utility model relates to the field of medical equipment, especially, relate to an infrared treatment instrument and control circuit of this kind of infrared treatment instrument.
Background
The infrared therapeutic apparatus is a medical equipment that can be used to disease treatment, and infrared therapeutic apparatus can realize disinfecting, prevent functions such as wound infection, and it has been applied to each field such as internal fistula nursing, and infrared therapeutic apparatus use can send the heat with certain power to realize the function of infrared heating.
The existing infrared therapeutic apparatus is powered by a battery or mains supply, various electronic devices are arranged in the infrared therapeutic apparatus, and each electronic device has specific working voltage. Therefore, no matter the infrared therapeutic apparatus adopts the battery for power supply or the commercial power for power supply, the power supply is required to be converted into the rated voltage suitable for each electronic device to supply power to each electronic device. But such voltage differences limit the communication of interconnects between electronic devices due to the voltage differences that exist between different electronic devices. For solving this problem, current infrared therapy apparatus adopts voltage conversion circuit to carry out voltage conversion, need add voltage conversion circuit in infrared therapy apparatus's inside in order to accomplish voltage conversion, and this can make infrared therapy apparatus's internal circuit structure more complicated, is unfavorable for infrared therapy apparatus's control efficiency and response precision, has also brought very big inconvenience for infrared therapy apparatus's circuit structure's miniaturization, portably.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can satisfy the electron device interconnection communication of two different rated voltages and circuit structure's infrared therapy appearance control circuit simple.
The second purpose of the utility model is to provide an infrared therapeutic apparatus with above-mentioned infrared therapeutic apparatus control circuit.
In order to achieve the first purpose, the utility model provides an infrared therapeutic apparatus control circuit comprises a power module, a control module and a radiation source driving circuit, wherein the radiation source driving circuit comprises a first switch device and a second switch device, the second switch device receives a control signal output by the control module and is switched on and off under the control of the control signal; the first switch device receives the voltage output by the power supply module, and the first switch device receives the signal output by the second switch device and changes the on-off state according to the on-off state change of the second switch device.
According to the scheme, the on-off of the first switch device is controlled through the on-off of the second switch device, so that the first switch device can be connected with the power supply module and the radiation source, the second switch device is used for receiving the control signal output by the control module and controlling the on-off state change of the first switch device, namely the first switch device receives higher voltage, and the second switch device receives lower voltage, and therefore the interconnection communication of the electronic devices with two different rated voltages is achieved.
Moreover, the control circuit of the infrared therapeutic apparatus does not need to be provided with a voltage conversion circuit, so that the complexity of the control circuit of the infrared therapeutic apparatus is reduced, the production cost of the infrared therapeutic apparatus is reduced, and the miniaturization of the infrared therapeutic apparatus is facilitated.
Preferably, the control terminal of the first switching device is connected to the signal output terminal of the second switching device, and the signal input terminal of the second switching device receives the control signal output by the control module.
Therefore, the control end of the second switch device can directly receive the control signal output by the control module and control the on-off of the first switch device, so that the radiation source driving circuit is simple in structure and beneficial to reducing the production cost of the infrared therapeutic apparatus.
The radiation source driving circuit further comprises a first voltage division device and a second voltage division device which are connected in series, wherein the second voltage division device is connected between the signal output ends of the first voltage division device and the second switch device; the control end of the first switching device is connected between the first voltage dividing device and the second voltage dividing device.
It can be seen that through the partial pressure effect of two partial pressure devices, can effectual signal through second switching element output control first switching element, like this, first switching element's control end can be connected to power module through first partial pressure device, and power module's high voltage direct current electricity can reduce the voltage of inputing to first switching element control end after the partial pressure of first partial pressure device, avoids first switching element's control end to receive too high voltage and leads to the damage of first switching element.
In a further embodiment, the second switching device is a triode or a field effect transistor. Because the triode or the field effect transistor is a common device capable of realizing the switching function, the production cost is low, the performance is stable, and the control circuit of the infrared therapeutic apparatus is beneficial to improving the working stability.
Optionally, the second switch device is a photoelectric coupler, the signal output end of the second switch device is a signal pin of a photoelectric triode, and the signal input end of the second switch device is a signal pin of a light emitting diode.
Therefore, the photoelectric coupler can realize the electric isolation between the high-voltage direct current and the low-voltage direct current, and avoid the damage of the high-voltage direct current to low-voltage electronic devices.
According to a further scheme, the power module comprises a switching power supply and a voltage reduction circuit, the switching power supply outputs a first voltage to the radiation source driving circuit, the voltage reduction circuit outputs a second voltage to the control module, and the first voltage is higher than the second voltage.
Therefore, for the radiation source driving circuit needing to use higher working voltage, the switching power supply directly outputs higher first voltage, and the control module with lower working voltage obtains second voltage for working after the voltage output by the switching power supply is reduced by the voltage reduction circuit, so that the working requirements of electronic devices with different rated voltages are met.
According to a further scheme, the infrared therapeutic apparatus control circuit further comprises a voltage feedback circuit, wherein the voltage feedback circuit collects the voltage output by the radiation source driving circuit and outputs feedback voltage to the control module.
Therefore, whether the voltage output by the radiation source driving circuit is overlarge or not can be detected through the voltage feedback circuit, and if the voltage exceeds the preset safe voltage, an alarm signal can be sent out by the control module.
In a further aspect, the radiation source driving circuit further comprises an overvoltage protection device connected to the current output of the first switching device.
Therefore, the overvoltage protection device can prevent the radiation source from being damaged due to overhigh voltage output by the radiation source driving circuit.
In a further aspect, the radiation source driving circuit further comprises a reverse current protection device, and the reverse current protection device receives the current output by the first switching device.
The reverse current protection device can prevent the current of the radiation source from reversely flowing to the first switching device to cause the damage of the first switching device, thereby protecting the radiation source driving circuit.
In order to achieve the second objective, the present invention provides an infrared therapeutic apparatus comprising a radiation source and the control circuit of the infrared therapeutic apparatus.
Drawings
Fig. 1 is an electrical schematic block diagram of a first embodiment of the control circuit of the infrared therapeutic apparatus of the present invention, a radiation source and a positioning assembly.
Fig. 2 is an electrical schematic diagram of a radiation source driving circuit according to a first embodiment of the control circuit of the infrared therapeutic apparatus of the present invention.
Fig. 3 is an electrical schematic diagram of the reset button circuit of the control module according to the first embodiment of the control circuit of the infrared therapeutic apparatus of the present invention.
Fig. 4 is an electrical schematic diagram of the storage circuit of the control module of the first embodiment of the control circuit of the infrared therapeutic apparatus of the present invention.
Fig. 5 is an electrical schematic diagram of the crystal oscillator module of the control module according to the first embodiment of the control circuit of the infrared therapeutic apparatus of the present invention.
Fig. 6 is an electrical schematic diagram of the main control indicating circuit of the control module according to the first embodiment of the control circuit of the infrared therapeutic apparatus of the present invention.
Fig. 7 is an electrical schematic diagram of the burning serial port of the control module of the first embodiment of the infrared therapeutic apparatus control circuit.
Fig. 8 is an electrical schematic diagram of the debugging serial port of the control module of the first embodiment of the control circuit of the infrared therapeutic apparatus of the present invention.
Fig. 9 is an electrical schematic diagram of the voltage feedback circuit according to the first embodiment of the control circuit of the infrared therapeutic apparatus of the present invention.
Fig. 10 is an electrical schematic diagram of the buzzer circuit of the first embodiment of the control circuit of the infrared therapeutic apparatus of the present invention.
Fig. 11 is an electrical schematic diagram of a radiation source driving circuit according to a second embodiment of the control circuit of the infrared therapeutic apparatus of the present invention.
The present invention will be further explained with reference to the drawings and examples.
Detailed Description
The utility model discloses an infrared therapeutic apparatus can be medical infrared therapeutic apparatus, for example the infrared therapeutic apparatus that the hospital used, also can be the miniature infrared therapeutic apparatus that the family used, infrared therapeutic apparatus is provided with radiation source and infrared therapeutic apparatus control circuit, and infrared therapeutic apparatus control circuit is used for controlling the work of radiation source, for example to radiation source loading voltage and the calorific capacity of control radiation source is controlled to the voltage size of control loading to the radiation source.
The first embodiment of the control circuit of the infrared therapeutic apparatus comprises:
referring to fig. 1, the control circuit of the infrared therapeutic apparatus includes a control module 10, a power module, a voltage feedback circuit 15, a buzzer circuit 16, a radiation source driving circuit 21, a first key circuit 31 and a second key circuit 32, the power module includes a switching power supply 11 and a voltage dropping circuit 12, and the radiation source driving circuit 21 can send a signal to the radiation source 23 to drive the radiation source 23 to operate. The infrared therapeutic apparatus is provided with a positioning component 33, preferably, the positioning component 33 is arranged opposite to the radiation source 23, when the arm of the patient or other parts to be treated need to be treated by infrared treatment, the parts needing instructions, such as the arm of the patient, can be placed at specific positions through the positioning component 33, infrared light is directly emitted through the radiation source 23, so that the infrared light is conveniently intensively irradiated to the parts, such as the arm of the patient, and the infrared heating precision and the infrared treatment effect are improved.
In this embodiment, be provided with the main control chip in the control module 10, the main control chip adopts STM32 series of chips to realize, and radiation source drive circuit 21, voltage feedback circuit 15, buzzer circuit 16, first key circuit 31 and second key circuit 32 all are connected with control module 10 electricity, and control module 10 has signal centralized control's function to control infrared therapeutic instrument's infrared heating process. The control module 10 can control the operation of the radiation source driving circuit 21, for example, to output a pulse modulation (PWM) signal to the radiation source driving circuit 21, and to change the power of the radiation source 23 by changing the duty ratio of the pulse modulation signal.
Preferably, the control module 10 can receive an instruction sent by the upper computer, after a user inputs an instruction for temperature regulation and control through the upper computer, the upper computer sends the received instruction to the control module 10, the control module 10 controls the output power of the radiation source driving circuit 21 according to the received signal, and the radiation source 23 can send an infrared light source with a certain temperature, so that the PWM regulation of the infrared heating process of the radiation source 23 is realized. Specifically, the control module 10 may output a pulse modulation signal with an adjusted duty ratio to the radiation source driving circuit 21, and the radiation source driving circuit 21 outputs a signal to the radiation source 23 according to the received pulse modulation signal, so as to control the power of the radiation source 23.
The power module includes switching power supply 11 and step-down circuit 12, switching power supply 11 receives 220V's alternating current, and will convert 220V's alternating current into 36V direct current voltage, rethread step-down circuit 12 carries out multistage step-down with 36V direct current voltage in proper order, in order to obtain the required operating voltage who accords with each electronic device, consequently, step-down circuit 12 can include a plurality of direct current power supply converting circuit, for example, be provided with three direct current power supply converting circuit, 36V's direct current voltage is through three direct current power supply converting circuit, it is stepped down to 12V to be in proper order, 5V, 3.3V's direct current voltage, consequently, infrared therapy apparatus's control circuit can output the direct current voltage of four kinds of different magnitude of voltage, can output 3.3V, 5V, 12V, 36V's direct current.
Referring to fig. 2, the radiation source driving circuit 21 includes two switching devices, the first switching device is a fet M1 which is turned on high, and the second switching device is a transistor Q1, and preferably, the transistor Q1 is a device which is turned on high. The base of the transistor Q1 is used as a signal input terminal of the second switching device, is connected to the control module 10 through the resistor R18, and receives a control signal output by the control module 10, preferably, the control signal is a PWM signal. The emitter of the transistor Q1 is grounded, and the collector is connected to the resistor R19.
The gate of the fet M1 is a control terminal, and is connected to the switching power supply 11 through the resistor R11 and receives the 36V dc voltage output by the switching power supply 11, the drain is connected to the switching power supply 11 and receives the 36V dc voltage output by the switching power supply 11, and the source is connected to the fuse FU 1. In this embodiment, the resistor R11 and the resistor R19 form a voltage dividing circuit, that is, the resistor R11 is a first voltage dividing device, the resistor R19 is a second voltage dividing device, and the resistor R19 is connected to the resistor R11 and the collector of the transistor Q1. And the gate of the field effect transistor M1 is connected between the resistor R11 and the resistor R19.
As can be seen from fig. 2, the collector of the transistor Q1 forms the signal output terminal of the second switching device, and can control the on/off of the fet M1 as the first switching device. Specifically, when the PWM signal output by the control module 10 is at a high level, the transistor Q1 is turned on, and the 36V dc voltage output from the switching power supply 11 is divided by the resistor R11 and the resistor R19 to form a dc voltage of about 3.3V at the resistor R11 and the resistor R19, at this time, the fet M1 is turned on, and the current output from the switching power supply 11 can flow to the fuse FU1 through the fet M1 and to the radiation source 23 through the diode D1.
When the PWM signal output by the control module 10 is at a low level, the transistor Q1 is turned off, and the current cannot form a loop through the resistors R11 and R19, and at this time, the fet M1 is also turned off, and the current output by the switching power supply 11 cannot flow to the fuse FU1 through the fet M1 and then flows to the radiation source through the diode D1. Therefore, the control module 10 controls the on/off state of the fet M1 to change by controlling the on/off state of the transistor Q1. Because the duty ratio of the PWM signal output from the control module 10 to the transistor Q1 is adjustable, the on-time of the transistor Q1 is changed, and the on-time of the field effect transistor M1 is also changed, so as to change the effective voltage applied to the radiation source 23, further realize the control of the heat productivity of the radiation source 23, and adjust the heating temperature of the infrared therapeutic apparatus.
In this embodiment, the fuse FU1 is connected to the current output terminal of the first switching device, i.e. the source of the fet M1, as an overvoltage protection device, and the fuse FU1 can be blown to prevent the radiation source 23 from being impacted by an excessive voltage or current when the voltage or current output by the switching power supply 11 is too high or too large. The diode D1, serving as a reverse current protection device, can receive the current output by the first switching device, and has its anode terminal connected to the fuse FU1 and its cathode terminal connected to the anode of the radiation source 23, so as to prevent the current from the radiation source 23 from reversely flowing to the fet M1 and damaging the fet M1. In addition, the negative terminal of radiation source 23 is connected to ground via resistor R27.
The control module 11 comprises a main control chip, a reset key circuit, a storage circuit, a crystal oscillator module, a main control indicating circuit, a burning serial port and a debugging serial port, wherein the main control chip is used for realizing a centralized control function, the reset key is used for carrying out reset control on the main control chip, the storage circuit is used for storing data transmitted by the main control chip, the crystal oscillator module is used for providing a clock signal for the main control chip, and the main control indicating circuit is used for indicating the start-stop state of the main control chip. When the main control chip is powered on and controls the radiation source driving circuit 21 to work so that the radiation source 23 emits an infrared light source, the main control indicating circuit emits an indicating light source, the burning serial port is used for burning programs of the main control chip, and the debugging serial port is used for debugging programs of the main control chip.
Referring to fig. 3, the reset key circuit includes a key switch NRST, and when the key switch NRST is pressed, the main control chip receives a low level signal, thereby implementing a reset operation. Preferably, the key switch NRST is connected in parallel with the capacitor C19.
Referring to fig. 4, the memory circuit includes a memory chip U8, preferably, the memory chip U8 is a non-volatile memory, pins 1, 2, 3, and 4 are all grounded, pins 5 and 6 are connected to a 3.3V dc voltage through resistors R22 and R24, respectively, pin 7 is grounded, pin 8 is connected to a 3.3V dc voltage, and is grounded through a capacitor C25.
Referring to fig. 5, the crystal oscillator module includes a crystal oscillator X1, a capacitor C13 is connected between pins 2 and 4 of the crystal oscillator X1, pin 2 is grounded, and pin 3 is connected to the main control chip through a resistor R20 and is grounded through a capacitor C16.
Referring to fig. 6, the main control indicating circuit includes a light emitting diode D5, an anode terminal of the light emitting diode D5 is connected to a 3.3V dc voltage through a resistor R21, a cathode terminal is connected to the main control chip, when the main control chip outputs a low level signal, the light emitting diode D5 emits light, and when the main control chip outputs a high level signal, the light emitting diode D5 does not emit light.
Referring to fig. 7, the serial interface includes a serial interface J3, pin 1 is connected to a 3.3V dc voltage, pins 2 and 3 are connected to the main control chip through resistors R12 and R13, respectively, and pin 4 is grounded. Referring to fig. 8, the debug serial port includes a serial interface J4, pins 1 and 2 are connected to a 3.3V dc voltage through resistors R16 and R15, respectively, and pins 1 and 2 are connected to the main control chip, and pin 3 is grounded.
In order to send out an alarm signal in time when the voltage output by the radiation source driving circuit 21 is too high, the present embodiment is provided with the voltage feedback circuit 15 and the buzzer circuit 16, wherein the voltage feedback circuit 15 is configured to collect the voltage output by the radiation source driving circuit 21, compare the collected voltage, and output the comparison result to the control module 10, that is, output the feedback voltage to the control module 10.
Referring to fig. 9, the voltage feedback circuit 15 includes a voltage divider circuit composed of resistors R45 and R44, the voltage divider circuit collects the voltage output by the radiation source driving circuit 21 and outputs the divided voltage to the comparator U9, the output terminal of the comparator U9 is connected to the resistor R43 and is grounded through a capacitor C30, and in addition, the output terminal of the voltage feedback circuit 15 is further provided with a voltage stabilizing diode D12. After receiving the feedback voltage output by the voltage feedback circuit 15, the control module 10 determines whether the voltage output by the radiation source driving circuit 21 is too high, for example, whether the voltage exceeds a preset safe voltage, if so, the control module drives the buzzer circuit 16 to operate, and the buzzer circuit 16 generates an alarm sound to remind a user that the voltage output by the radiation source driving circuit 21 is too high.
Referring to fig. 10, the buzzer circuit 16 includes a transistor Q2, a base of the transistor Q2 receives a signal output by the control module 10 through a resistor R5, an emitter is grounded, a collector is connected to the buzzer, the buzzer is also connected to a 12V dc voltage through a resistor R4, and a diode D4 is connected between one pin of the buzzer and the 12V dc voltage.
The first key circuit 31 and the second key circuit 32 both output key signals to the control module 10, the first key circuit 31 and the second key circuit 32 can be mechanical keys or physical keys, a user can send a timing heating instruction through the first key circuit 31 and send a temperature adjusting instruction through the second key circuit 32, the control module 10 changes the duty ratio of the PWM signal output to the radiation source driving circuit 21 according to the timing heating instruction within a preset time period and the temperature adjusting instruction, so as to change the infrared heating power of the radiation source 23.
The positioning component 33 is arranged opposite to the radiation source 23, when the arm of the patient or other parts to be treated need to be treated by infrared ray, the arm of the patient can be placed at a specific position by the positioning effect of the positioning component 33, and infrared light is directly emitted by the radiation source 23, so that the infrared light is conveniently intensively irradiated to the arm of the patient to wait for the treatment part, and the infrared heating precision and the infrared treatment effect are improved. Preferably, the positioning assembly 33 is a mechanical assembly, which includes a base for placing the heated part (such as an arm) and a positioning rod for setting the distance between the heated tissue and the radiation source 23, and the position of the arm can be maintained by the base to realize the precise infrared heating function. The safe distance between the arm and the radiation source 23 can be kept through the positioning rod, so that the situation that the arm and the radiation source 23 are scalded by infrared rays due to the fact that the distance between the arm and the radiation source 23 is too small is prevented. Since the positioning assembly 33 is a common mechanism of an infrared treatment apparatus, it will not be described in detail.
The second embodiment of the control circuit of the infrared therapeutic apparatus comprises:
the circuit framework of this embodiment is the same as that of the first embodiment only in that the radiation source driving circuit is different, and only the radiation source driving circuit will be described below. Referring to fig. 11, the radiation source driving circuit includes a field effect transistor M2 as a first switching device and a photo coupler U1 as a second switching device, wherein the field effect transistor M2 is a switching device that is turned on at a high level.
The phototransistor U1 includes a light emitting diode and a phototransistor, the anode terminal of the light emitting diode is connected to the 3.3V dc voltage through a resistor R32, and the cathode terminal is connected to the control module 10 as a signal pin, so that the cathode terminal of the light emitting diode serves as the signal input terminal of the second switching device. One pin of the phototransistor is grounded, and the other pin is used as a signal pin and connected to a resistor R33.
The gate of the fet M1 is a control terminal, and is connected to the switching power supply through the resistor R31 and receives the 36V dc voltage output by the switching power supply, the drain is connected to the switching power supply and receives the 36V dc voltage output by the switching power supply, and the source is connected to the fuse FU 2. In this embodiment, the resistor R31 and the resistor R33 form a voltage dividing circuit, that is, the resistor R31 is a first voltage dividing device, the resistor R33 is a second voltage dividing device, and the resistor R33 is connected between the resistor R31 and a signal pin of a photo-transistor of the photocoupler U1. And the gate of the field effect transistor M2 is connected between the resistor R31 and the resistor R33.
As can be seen from fig. 11, the signal pin of the phototransistor forms the signal output terminal of the second switching device, which can control the on/off of the fet M2 as the first switching device. Specifically, when the PWM signal output by the control module is at a low level, the light emitting diode emits light, the phototransistor is turned on, the 36V dc voltage output from the switching power supply is divided by the resistor R31 and the resistor R33, and then a dc voltage of about 3.3V is formed at the resistor R31 and the resistor R33, at this time, the fet M2 is turned on, and the current output from the switching power supply can flow to the fuse FU2 through the fet M2 and to the radiation source through the diode D2.
When the PWM signal output by the control module 10 is at a low level, the light emitting diode does not emit light, the phototransistor is turned off, the current cannot form a loop through the resistors R31 and R33, at this time, the fet M2 is also turned off, and the current output by the switching power supply cannot flow to the fuse FU2 through the fet M2 and then flows to the radiation source through the diode D2. Therefore, the control module controls the on-off state change of the field effect transistor M2 by controlling the on-off state change of the phototriode. Because the duty ratio of the PWM signal output by the control module is adjustable, the conduction time of the field effect transistor M2 is changed along with the change of the conduction time of the phototriode, so that the effective voltage loaded to the radiation source is changed, the control of the heating value of the radiation source is realized, and the heating temperature of the infrared therapeutic apparatus is adjustable.
In this embodiment, the fuse FU2 is connected to the current output terminal of the first switching device, i.e. the source of the fet M2, as an overvoltage protection device, and the fuse FU2 can be blown to prevent the radiation source from being impacted by an excessive voltage or current when the voltage or current output by the switching power supply is too high or too large. The diode D2, serving as a reverse current protection device, can receive the current output by the first switching device, and has an anode terminal connected to the fuse FU2 and a cathode terminal connected to the anode of the radiation source, so as to prevent the current from the radiation source from reversely flowing to the fet M2 and damaging the fet M2. In addition, the negative pole of the radiation source is connected to ground via a resistor R34.
The control circuit of the infrared therapeutic apparatus realizes interconnection communication of two electronic devices with different rated voltages through the first switch device and the second switch device, specifically, the radiation source needs to use 36V direct current voltage, and the rated voltage used by the control module is only 3.3V, so that the on-off of the first switch device is controlled through the second switch device, the voltage borne by the first switch device is 36V, and the voltage of the first switch device is only 3.3V, thereby avoiding the voltage of the radiation source from being loaded on the control module, and avoiding the control module from being damaged due to the fact that the control module is loaded with the over-high direct current voltage.
Compare traditional infrared therapeutic instrument and can only change voltage in order to keep the voltage uniformity between two electron devices, the utility model discloses need not set up voltage conversion circuit, but adopted the mode that two switching devices match each other to realize PWM control, radiation source drive circuit both can realize normal infrared light drive control function, has overcome the weak point of both voltage differences of control module and radiation source again to voltage conversion step has been saved, PWM control's efficiency and response speed have been improved.
In addition, the voltage feedback circuit can perform feedback control on the voltage input by the radiation source, and realize the function of overvoltage alarm so as to prevent the radiation source from generating an overvoltage operation state. And the power module can convert alternating current into direct current for output, and can convert direct current voltage into direct current voltage with various amplitudes through the voltage reduction circuit so as to output different voltages to each electronic device.
Infrared therapeutic apparatus embodiment:
the infrared therapeutic apparatus comprises a radiation source and a control circuit, and the control circuit can adopt the control circuits of the two embodiments. In addition, the infrared therapeutic apparatus can be further provided with a positioning component for positioning the parts of the arm and the like of the patient needing to be treated.
Of course, the above-mentioned embodiments are only preferred embodiments of the present invention, and many changes may be made in practical applications, for example, changes in the type of chip used by the control module, or changes in the specific circuit structure of each circuit, etc., which do not affect the implementation of the present invention, and are also included in the scope of the present invention.
Claims (10)
1. Infrared therapeutic instrument control circuit includes:
the device comprises a power supply module, a control module and a radiation source driving circuit;
the method is characterized in that:
the radiation source driving circuit comprises a first switching device and a second switching device, and the second switching device receives the control signal output by the control module and is switched on and off under the control of the control signal;
the first switch device receives the voltage output by the power supply module, and the first switch device receives the signal output by the second switch device and changes the on-off state according to the on-off state change of the second switch device.
2. The infrared therapy apparatus control circuit of claim 1, wherein:
the control end of the first switching device is connected to the signal output end of the second switching device, and the signal input end of the second switching device receives the control signal output by the control module.
3. The infrared therapy apparatus control circuit of claim 2, wherein:
the radiation source driving circuit further comprises a first voltage division device and a second voltage division device which are connected in series, and the second voltage division device is connected between the signal output ends of the first voltage division device and the second switch device;
the control end of the first switching device is connected between the first voltage dividing device and the second voltage dividing device.
4. The infrared therapy apparatus control circuit of claim 2 or 3, wherein:
the second switching device is a triode or a field effect transistor.
5. The infrared therapy apparatus control circuit of claim 2 or 3, wherein:
the second switch device is a photoelectric coupler, the signal output end of the second switch device is a signal pin of a photoelectric triode, and the signal input end of the second switch device is a signal pin of a light emitting diode.
6. The infrared therapy apparatus control circuit of any one of claims 1 to 3, wherein:
the power module comprises a switching power supply and a voltage reduction circuit, the switching power supply outputs a first voltage to the radiation source driving circuit, the voltage reduction circuit outputs a second voltage to the control module, and the first voltage is higher than the second voltage.
7. The infrared therapy apparatus control circuit of any one of claims 1 to 3, wherein:
the control circuit of the infrared therapeutic apparatus further comprises a voltage feedback circuit, wherein the voltage feedback circuit collects the voltage output by the radiation source driving circuit and outputs feedback voltage to the control module.
8. The infrared therapy apparatus control circuit of any one of claims 1 to 3, wherein:
the radiation source driving circuit further comprises an overvoltage protection device connected to the current output of the first switching device.
9. The infrared therapy apparatus control circuit of any one of claims 1 to 3, wherein:
the radiation source driving circuit further comprises a reverse current protection device, wherein the reverse current protection device receives the current output by the first switching device.
10. Infrared therapeutic instrument, including the radiation source, its characterized in that: the infrared treatment apparatus further comprises an infrared treatment apparatus control circuit according to any one of claims 1 to 9.
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| CN202021570303.4U CN213407498U (en) | 2020-07-31 | 2020-07-31 | Infrared therapeutic apparatus and control circuit thereof |
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| CN202021570303.4U CN213407498U (en) | 2020-07-31 | 2020-07-31 | Infrared therapeutic apparatus and control circuit thereof |
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