CN103977508B - Smart ultrasonic physical therapy instrument - Google Patents

Abstract

The invention discloses an intelligent ultrasonic physiotherapy instrument, which is composed of a power supply module, a main control module, a DDS module, a power amplifier module, a frequency tracking module, a human-computer interaction module, a treatment head module and a temperature control module. The intelligent ultrasonic physiotherapy instrument also has the function of expert treatment, has the advantages of simple structure, automatic frequency tracking, high stability, multi-frequency, high output power, easy operation, etc., and can be widely used in treating patients with organic cardiovascular diseases , Extracorporeal physical therapy for patients with sports injuries.

Description

Intelligent Ultrasonic Physiotherapy Apparatus

technical field

The invention relates to an intelligent ultrasonic physiotherapy instrument, in particular to a high-tech ultrasonic physiotherapy instrument for in vitro physical therapy of patients with organic cardiovascular disease and sports trauma.

Background technique

The action of ultrasonic waves on human tissues will produce certain biological effects, such as mechanical effects, thermal effects, cavitation effects, etc., which can be used to achieve certain therapeutic purposes, which is the so-called ultrasonic physiotherapy.

The attenuation value of ultrasound in biological tissue increases almost linearly with frequency, that is, the higher the frequency, the larger the attenuation coefficient and the faster the attenuation. Different ultrasound frequencies will cause the ultrasound signal to enter the human body at different depths; on the other hand, excessive Ultrasonic radiation can cause harm to the human body, and different doses of ultrasonic signals should be considered for different treatment sites.

At present, most of the more popular ultrasonic therapeutic instruments in the domestic market are similar in structure, and have common defects such as low degree of automation, complicated operation, narrow adjustable sound power range, and weak automatic protection function.

At present, ultrasonic physiotherapy instruments mostly adopt the technical scheme of single frequency and fixed frequency, and this frequency is fixed and unchangeable. The treatment area of a single frequency is limited, and when a patient needs to treat multiple areas, additional equipment is required to complete it. During the treatment process, due to differences in temperature and environment, the resonance frequency of the ultrasonic therapy head changes. Since the current ultrasonic physiotherapy equipment does not have the function of automatic frequency tracking, frequency imbalance will occur, which will cause impedance mismatch and reduce efficiency. , Seriously not working properly.

Most of the existing ultrasonic physiotherapy instruments are complicated to operate and do not have the function of expert treatment. The treatment frequency is mostly single and fixed at 1MHz or 3MHz, the output sound power is within 2W/cm2, and the effective area of the treatment head is relatively small with a single treatment head. Occasionally, a physiotherapy instrument with dual frequency and dual treatment heads has a large difference in the effective treatment area of the 1MHz and 3MHz treatment heads, the output sound power is small, and it does not have the automatic frequency tracking function.

Contents of the invention

In order to overcome the deficiencies in the prior art, the object of the present invention is to provide an intelligent dual-frequency or multi-frequency ultrasonic physiotherapy apparatus, which can effectively avoid the shortcomings in the prior art.

In order to solve the above-mentioned technical problems and achieve the above-mentioned purpose, the present invention is achieved through the following technical solutions:

An intelligent ultrasonic physiotherapy instrument, including a power supply module, a human-computer interaction module, a main control module, a DDS module, a power amplifier module, a treatment head module, a frequency tracking module and a temperature control module;

The power supply module includes a 220V AC to DC 15V power module, and the 220V AC to DC 15V power module is respectively connected to a level conversion module and a push-pull power amplifier circuit; the 220V AC to DC 15V power module converts AC 220V to DC 15V It is used to provide power for the push-pull power amplifier circuit; the level conversion module converts the DC 15V voltage into various voltages required by the main control module and the human-computer interaction module. In another embodiment, the power module may include a rechargeable polymer battery.

The human-computer interaction module includes a touch screen and a status display light; through the touch screen, various treatment parameters can be set, and at the same time, the function of expert treatment can be called, which is convenient, intuitive and concise to operate; the status indicator light is used to display the operation of the physiotherapy instrument in real time state.

The main control module includes a microprocessor, and the microprocessor is connected with a DDS circuit, a duty ratio adjustment circuit, a digital potentiometer, a frequency switching and matching circuit, a phase difference detection circuit, a temperature sampling circuit and an over-temperature protection circuit ;The microprocessor mainly controls the ultrasonic treatment head module to output ultrasonic signals that meet the requirements within the overall technical index range of the equipment according to the treatment parameters set by the user, and makes it work stably and reliably;

The DDS module includes a DDS generation circuit, the output end of the DDS generation circuit is connected to a low-pass filter circuit, the output end of the low-pass filter circuit is connected to a duty ratio adjustment circuit, and the duty ratio adjustment circuit is connected to the The microprocessor is connected; the DDS generating circuit is used to generate the original ultrasonic excitation signal, which is realized by a direct digital frequency synthesizer, and has the advantages of convenient frequency adjustment, high resolution, short frequency conversion time, continuous output phase, full digitalization and convenient control, etc. ; The low-pass filter circuit is used to filter out the harmonic interference output by the DDS generating circuit. The harmonic interference mainly comes from the reference clock. Choose the 7th-order Butterworth low-pass filter. The Butterworth filter has the flattest frequency in the passband. Amplitude-frequency characteristics, and the decay rate is relatively fast; the duty cycle adjustment circuit is used to control the duty cycle of the output ultrasonic signal, and the microcontroller adjusts the duty cycle of the ultrasonic excitation signal by controlling the duty cycle adjustment circuit, so as to realize the output of the ultrasonic signal. Signal duty cycle control.

The power amplifier module includes a first-stage amplifying circuit, the non-inverting input terminal of the first-stage amplifying circuit is connected to the output end of the duty ratio adjustment circuit, so as to realize preliminary amplification of the excitation signal after the duty ratio modulation; the first-stage amplifying circuit The inverting input end of the circuit is connected to a digital potentiometer, and the output signal is controlled by adjusting the size of the resistance connected to the inverting end. After subsequent amplification, the control of the treatment intensity is finally realized. The digital potentiometer and the micro-processing The output end of the first-stage amplifier circuit is connected to the second-stage amplifier circuit, and the output end of the second-stage amplifier circuit is connected to a push-pull power amplifier circuit; the excitation signal generated by the DDS generating circuit is very weak, and it needs power amplification to drive the ultrasonic wave. Transducer; the first-level amplifier circuit realizes the initial amplification of the excitation signal, and the second-level amplifier circuit further amplifies the output of the first-level amplifier circuit to output a few W power, and finally amplifies through the push-pull power amplifier circuit to output the power drive signal. Push the transducer to work; the microcontroller adjusts the output power by controlling the magnification of the first-stage power amplifier (the size of the resistance connected to the inverting terminal).

The treatment head is one or more, preferably 2-8, and has an adsorption component, which is used to absorb the treatment head on the treatment site. The adsorption part is an approximately conical adsorption cover, and the adsorption area can be circular or oval. The ultrasonic treatment head is in close contact with the treatment site through negative pressure, and the pressure acting on the treatment head and the human body can be regulated by adjusting the size of the adsorption force.

The treatment head module includes a frequency switching and matching circuit, the input end of the frequency switching and matching circuit is connected to the output end of the push-pull power amplifier circuit; the input end of the frequency switching and matching circuit is also connected to the microprocessor; the The output end of the frequency switching and matching circuit is connected to a transducer; the frequency switching and matching circuit has two functions: one is used to switch between multiple center frequencies, such as 1MHz, 2MHz, and 3MHz; the other is impedance matching, so that The transducer works in a series resonance pure resistance state to improve the efficiency of the equipment; the transducer is used to convert electrical energy (ultrasonic drive signal) into mechanical energy (ultrasonic) for output.

The treatment head can be provided with an echo sensor to monitor the transmission focus depth of the ultrasound, which is convenient for the user to debug and select an appropriate treatment frequency.

The frequency tracking module includes a current and voltage sampling circuit, the input of the current and voltage sampling circuit is connected to the transducer; the output of the current and voltage sampling circuit is connected to a phase difference detection circuit, and the output of the phase difference detection circuit The terminal is connected to a microcontroller; the current and voltage sampling circuit is used to obtain the phase size of the voltage and current in the transducer; the phase difference detection circuit is used to judge the phase difference of the voltage and current signals, and the microcontroller adjusts the frequency according to the size of the phase difference. In order to realize the automatic tracking of the frequency.

Described temperature control module comprises a temperature sampling circuit, and described temperature sampling circuit is connected with over-temperature protection circuit and microcontroller; After collecting the temperature, it is judged whether it exceeds the set safety threshold. If it exceeds the temperature, the over-temperature protection circuit is controlled to cut off the output to ensure the safety of users.

The level conversion module is connected to the microprocessor, and the 220V AC to DC 15V power supply module is connected to a push-pull power amplifier circuit.

The touch screen and status indicator lights are respectively connected to the microcontroller.

The expert control module includes pre-set expert treatment prescriptions, which can be called through the human-computer interaction module. The expert treatment prescriptions preset different frequency or frequency combinations, power levels, and treatment time parameters for different diseases.

The expert therapist can set the output frequency and power of each ultrasonic emitting head differently, so as to optimize the depth, cross-section, and cross-sectional size around the central treatment site.

Compared with the prior art, the present invention has the following beneficial effects:

(1) The output ultrasound can have multiple center frequencies, and it can be continuously adjusted within the range of 0.5-3.5MHz. It can output continuous wave and pulse wave. The duty cycle of pulse waveform is adjustable from 10-100%. Multiple treatment heads output, Easy to use;

It can generate ultrasonic excitation signals with multiple center frequencies, and it can be continuously adjusted within the range of 0-3.5MHz. It can output continuous waveforms and pulse waveforms. The pulse waveform duty cycle is adjustable from 10-100%, and the treatment time is adjustable from 0-30 minutes. tone;

(2) The effective radiation area of the ultrasonic treatment head is 3-9 cm2, preferably 5 cm2, and the effective output sound intensity is ≤3W/cm2; the output sound power is high, and the user can choose from a large range; there are multiple ultrasonic treatment heads, and multiple treatment at the same time;

(3) It has the function of automatic frequency tracking, so that the transducer always works near the resonance point, improving equipment efficiency and user comfort;

(4) On-line temperature monitoring, over-temperature protection function; according to different users, the temperature safety threshold can be fine-tuned to improve the therapeutic effect;

(5) It has the function of expert treatment and adopts touch screen for human-computer interaction, which is simple, convenient and intuitive.

The above description is only an overview of the technical solutions of the present invention. In order to understand the technical means of the present invention more clearly and implement them according to the contents of the description, the preferred embodiments of the present invention and accompanying drawings are described in detail below. The specific embodiment of the present invention is given in detail by the following examples and accompanying drawings.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Fig. 1 is the overall frame diagram of the present invention.

FIG. 2 is a schematic circuit diagram of the DDS module of the present invention.

Fig. 3 is a schematic circuit diagram of the power amplifier module of the present invention.

Fig. 4 is a schematic circuit diagram of the treatment head module of the present invention.

Fig. 5 is a schematic circuit diagram of the frequency tracking module of the present invention.

Fig. 6 is a schematic circuit diagram of the frequency tracking module of the present invention.

detailed description

The technical implementation process of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Example 1:

As shown in Figure 1, an intelligent dual-frequency ultrasonic physiotherapy instrument includes a power supply module 1, a human-computer interaction module 2, a main control module 3, a DDS module 4, a power amplifier module 5, a treatment head module 6, a frequency tracking module 7 and a temperature control module 8;

The power supply module 1 includes a 220V AC to DC 15V power supply module 101, and the 220V AC to DC 15V power supply module 101 is connected with a level conversion module 102; the 220V AC to DC 15V power supply module 101 converts AC 220V to DC 15V To provide power to the push-pull power amplifier circuit 503; the level conversion module 102 converts the DC 15V voltage into various voltages required by the main control module 3 and the human-computer interaction module 2.

The human-computer interaction module 2 includes a touch screen 201 and a status display light 202; through the touch screen 201, various treatment parameters can be set, such as treatment time, treatment frequency, treatment intensity and duty cycle; at the same time, the function of expert treatment can also be called , easy to operate, intuitive and concise; the status indicator light 202 is used to display the operating status of the physical therapy device in real time.

The main control module 3 includes a microprocessor 301, and the microprocessor 301 is connected with a DDS circuit 401, a duty ratio adjustment circuit 403, a digital potentiometer 504, a frequency switching and matching circuit 601, a phase difference detection circuit 702, Temperature sampling circuit 801 and over-temperature protection circuit 802; the microprocessor mainly controls the ultrasonic treatment head module to output ultrasonic signals that meet the requirements according to the treatment parameters set by the user and within the range of the overall technical indicators of the equipment, and makes it stable and reliable to work;

The DDS module 4 includes a DDS generation circuit 401, the output end of the DDS generation circuit 401 is connected to a low-pass filter circuit 402, and the output end of the low-pass filter circuit 402 is connected to a duty ratio adjustment circuit 403, the The duty ratio adjustment circuit is connected to the microprocessor 301; the DDS generation circuit 401 is used to generate the original ultrasonic excitation signal, which is realized by a direct digital frequency synthesizer, and has the advantages of convenient frequency adjustment, high resolution, short frequency conversion time, and continuous output phase , full digitalization and convenient control; the low-pass filter circuit 402 is used to filter out the harmonic interference output by the DDS generating circuit. The device has the flatst amplitude-frequency characteristics in the passband, and the decay rate is relatively fast; the duty ratio adjustment circuit 403 is used to control the duty ratio of the output ultrasonic signal, and the microcontroller 301 adjusts the ultrasonic wave by controlling the duty ratio adjustment circuit 403 The duty cycle of the excitation signal, so as to realize the control of the duty cycle of the output ultrasonic signal.

The power amplifier module 5 includes a primary amplifier circuit 501, the non-inverting input terminal of the primary amplifier circuit is connected to the output terminal of the duty cycle adjustment circuit 403, and the excitation signal after the duty cycle modulation is realized to be initially amplified; The inverting input terminal of the primary amplifying circuit is connected to a digital potentiometer 504. By adjusting the size of the resistance connected to the inverting terminal, the output signal is controlled. After subsequent amplification, the control of the treatment intensity is finally realized. The digital potentiometer Meter 504 is connected with microprocessor 301, and the output end of described primary amplifying circuit is connected secondary amplifying circuit 502, and the output end of described secondary amplifying circuit 502 is connected a push-pull power amplifier circuit 503; The excitation signal that DDS generating circuit 401 produces It is very weak, and needs to be amplified to drive the ultrasonic transducer; the primary amplifier circuit 501 realizes the initial amplification of the excitation signal, and the secondary amplifier circuit 502 further amplifies the output of the primary amplifier circuit to output a few W power, and finally passes the The push-pull power amplifier circuit 503 amplifies and outputs power driving signals to drive the transducer to work; the microcontroller 301 adjusts the output power by controlling the magnification of the first-stage power amplifier (the resistance connected to the inverting terminal).

The treatment head module 6 includes a frequency switching and matching circuit 601, the input of the frequency switching and matching circuit 601 is connected to the output of the push-pull power amplifier circuit 503; the input of the frequency switching and matching circuit is also connected to the microprocessor device 301; the output end of the frequency switching and matching circuit 601 is connected to a transducer 602; the frequency switching and matching circuit 601 has two functions: one is used to realize switching of multiple center frequencies; the other is impedance matching, Make the transducer 602 work in a series resonance pure resistance state to improve the efficiency of the device; the transducer 602 is used to convert electrical energy (ultrasonic drive signal) into mechanical energy (ultrasonic) for output.

The frequency tracking module 7 includes a current and voltage sampling circuit 701, the input of the current and voltage sampling circuit 701 is connected to the transducer 602; the output of the current and voltage sampling circuit 701 is connected to a phase difference detection circuit 702, the The output terminal of the phase difference detection circuit 702 is connected to the microcontroller 301; the current and voltage sampling circuit 701 is used to obtain the phase size of the voltage and current in the transducer; the phase difference detection circuit 702 is used to judge the phase difference of the voltage and current signals, and the microcontroller The controller 301 adjusts the frequency according to the magnitude of the phase difference, thereby realizing automatic tracking of the frequency.

Described temperature control module 8 comprises a temperature sampling circuit 801, and described temperature sampling circuit 801 is connected over-temperature protection circuit 802 and microcontroller 301; After the microprocessor collects the temperature, it judges whether it exceeds the set safety threshold. If it exceeds the temperature, it controls the over-temperature protection circuit 802 to cut off the output to ensure the safety of users.

The level conversion module 102 is connected to the microprocessor 301 , and the 220V AC to DC 15V power supply module 101 is connected to a push-pull power amplifier circuit 503 .

The touch screen 201 and the status indicator light 202 are respectively connected to the microcontroller 301 .

specific:

In the human-computer interaction module 2, the touch screen 201 includes the input and display of user parameters, adopts a serial port true color screen, and is controlled by the serial port of the microprocessor 301; the status indicator light 202 is mainly used to display the operating status of the device in real time, and is controlled by the microprocessor 301. 301 I/O control.

In the main control module 3, the microprocessor 301 adopts the 32-bit microprocessor STM32F103 chip based on the ARM core of ST Company, the highest operating frequency is 72MHz, and it has two built-in 12-bit analog/digital converters A/D, two 12-bit Digital/analog converter D/A, up to 7 timers, with SPI, USB, CAN, IIC, USART and other communication interfaces. The microprocessor 301 mainly controls the ultrasonic treatment head module to output ultrasonic signals that meet the requirements within the overall technical index range of the equipment according to the treatment parameters set by the user, and makes it work stably and reliably.

In the power supply module 1, the SAS100-15-K isolated power supply is used, the power is 100W, the input AC voltage range is 165-265VAC, and the output DC voltage signal is 15V, which provides power for the push-pull power amplifier module and the level conversion module; level conversion The module adopts multiple DC-DC modules to complete the conversion of DC15V-DC12V, DC12V-±9V, DC9V-DC5V, DC5V-DC3.3V and other levels respectively.

Example 2:

Referring to Figure 2, the microprocessor controls the DDS integrated chip to generate ultrasonic excitation signals. The DDS integrated chip adopts AD9851 of AD Company, and the output frequency is up to 180MHz. It can generate output signals such as sine wave, square wave and triangle wave, and has low power consumption. The microprocessor is connected through the serial bus, and the 50MHz active crystal oscillator is used as the reference clock. The output sine wave excitation signal passes through the low-pass filter circuit composed of R, L, and C; the signal after filtering out the harmonic interference enters the duty ratio adjustment Circuit; the duty ratio adjustment circuit is composed of high-speed analog switches, and the microprocessor realizes the control of the duty ratio of the excitation signal by adjusting the duty ratio of the input B-terminal signal: when the B-terminal is high, fout=fin; when the B-terminal is low Usually, fout=GND(0V), within a fixed cycle, adjust the time of high and low level, that is to realize the control of the duty cycle of the excitation signal.

Example 3:

See Figure 3, in the power amplifier module, U4 forms a first-stage amplifier circuit, and the excitation signal is input from the non-inverting terminal to form the same-phase proportional amplifier circuit. The amplification factor is determined by the ratio of the output resistance of the digital potentiometer to R3, and the microprocessor adjusts The size of the output resistance of the digital potentiometer, thereby controlling the size of the output voltage, and further realizing the control of the output power; the output power of U4 is about 1W; C5 is a coupling capacitor; Q3 constitutes a secondary amplifier circuit, and R4 and R5 are divided by voltage Then form a bias circuit, R6 and C6 function as feedback compensation, the output power of Q3 after amplification reaches about 5W, and it is coupled to the push-pull power amplifier circuit through the transformer T1; V_set1 and V_set2 are used to set the static working current of Q1 and Q2, and its size is 0-6V adjustable, Q1 and Q2 are power MOS tubes, T2 is an output transformer, and L4 is a choke coil to filter out the influence of high frequency on the DC power supply.

Example 4:

See Figure 4, U6 is a frequency switching relay. The microprocessor controls U6 to output ultrasonic driving signals with different center frequencies (such as 1MHz or 3MHz) according to the user's parameter settings; the function of the matching circuit is to improve the efficiency of the system. When the transducer has series resonance, the total impedance of the circuit is not a pure resistance state; on the one hand, the matching circuit is added with a matching inductance or capacitance to make the circuit a pure resistance state, and the impedance of the transducer is the smallest at this time; the ultrasonic drive circuit is regarded as a power supply, The transducer is used as a load, and it can be known from circuit theory knowledge that when the internal resistance of the power supply is equal to the load impedance, the load obtains the maximum power. On the other hand, the matching circuit is to perform impedance transformation, so that the transducer can obtain the maximum power input, and the secondary function is realized by the transformer T2. According to the number of treatment heads, U6 can have multiple frequency output modules.

Example 5:

See accompanying drawings 5 and 6. Figure 5 is a schematic diagram of voltage and current sampling. The sampling circuit can neither affect the original main circuit, but also can accurately collect the required signal, and try to ensure that the signal is not distorted. Voltage sampling is another set of windings on the magnetic core of high-frequency power transformer T2, and the adjustable potentiometer RV is connected to both ends of the windings to adjust the output sampling voltage; current sampling can be done by resistors, Hall current sensors or current transformers accomplish. Since the resistor is directly connected in series with the transducer, when the resistance value is too large, additional power loss and voltage drop will occur, and if the resistance value is too small, the signal will be too weak, so the design is troublesome; the Hall current sensor has relatively high precision, But the cost is high, and the application frequency is low; the present invention uses a current transformer for current sampling, and the current transformer T3 is connected in series between the ultrasonic driving signal and the transducer, and the power resistor Ri converts the current signal into a voltage signal for output.

As shown in Figure 6, two zero-crossing comparators composed of two operational amplifiers U7 and U8 set the input sampling current and sampling voltage signals of the same frequency into square wave signals of the same period; U9 and U10 are two inverters The phase device increases the front and rear edge steepness of the zero-crossing comparator output square wave; U11 is a D flip-flop, and the adjusted current and voltage square wave signals are respectively input to the D terminal and CLK terminal of the D flip-flop. If the voltage leads the current, Then the output level Sig_hl of the Q terminal of the D flip-flop is logic "0"; if the current leads the voltage, the output level of Sig_hl of the Q terminal of the D flip-flop is logic "1"; the output level Sig_hl of the Q terminal of the D flip-flop is input To the microprocessor, as the basis for increasing or decreasing the frequency under the control of the microprocessor. The two square wave signals are also input to the AND gate U12 at the same time, and the pulse width signal output Sig_ph reflecting the phase difference is obtained. If the voltage and current phases are the same, the duty cycle of the pulse width signal Sig_ph is 50%; if there is a phase difference between the two difference, the duty cycle of the output pulse width signal Sig_ph must be less than 50%. The duty cycle Sig_ph of this output reflects the magnitude of the current and voltage phase difference. The Sig_ph signal is also input to the microprocessor, so that the microprocessor By continuously scanning the Sig_hl and Sig_ph signals, the frequency increment of the DDS generator is generated by calculation according to the duty cycle of the signal and the lead or lag relationship of the current, thereby adjusting the frequency of the ultrasonic excitation signal, realizing automatic frequency tracking, and making the transduction The converter always works in the resonant state, improving the efficiency of the system.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (5)

1. a kind of Intelligence Ultrasound physiotherapy equipment, it is characterised in that：Including power supply module (1), human-computer interaction module (2), main control module (3), DDS module (4), power amplifier module (5), treatment head module (6), frequency tracking module (7) and temperature control modules (8)；Institute Stating human-computer interaction module (2) includes touch-screen (201) and status indicator lamp (202)；The main control module (3) includes a microprocessor Device (301)；

There is circuit (401) in the DDS module (4), the output end connection one that the DDS occurs circuit (401) is low including a DDS Bandpass filter circuit (402), the output end of the low-pass filter circuit (402) connects a duty ratio adjusting circuit (403), described to account for Sky is connected than regulation circuit (403) with microprocessor (301)；

The power amplifier module (5) includes one-level amplifying circuit (501), and the in-phase input end of the one-level amplifying circuit (501) connects The output end of duty ratio adjusting circuit (403) is connect, realization is tentatively amplified to the pumping signal after duty ratio modulation；Described one The inverting input of level amplifying circuit (501) connects a digital potentiometer (504), and the big of inverting resistance is accessed by adjusting Small, the size of controlled output signal is amplified with the final control realized to treating intensity, described digital potentiometer by follow-up (504) it is connected with microprocessor (301), the output end of the one-level amplifying circuit (501) connects second amplifying circuit (502), Second amplifying circuit (502) output end connects a push-pull power amplifier circuit (503)；

Treatment head module (6) includes a frequency error factor and match circuit (601), the frequency error factor and match circuit (601) output end of input connection push-pull power amplifier circuit (503)；The input of the frequency error factor and match circuit (601) End is also connected with microprocessor (301)；The frequency error factor is connected a transducer (602) with the output end of match circuit (601)；

The frequency tracking module (7) includes a current-voltage sampling circuit (701), the current-voltage sampling circuit (701) Input connect transducer (602)；The output end of the current-voltage sampling circuit (701) connects a phase difference detecting circuit (702), the output end of the phase difference detecting circuit (702) connects microcontroller (301), and microcontroller is according to the big of phase difference It is small, adjust frequency, so as to realize frequency from motion tracking；So microprocessor exports letter by continually scanning for the Q ends of d type flip flop Number (Sig_hl) and pulse width signal output (Sig_ph) signal of phase difference is embodied, the dutycycle size and electric current according to signal Advanced or lagged relationship produces the frequency increment of DDS generators by computing, so as to adjust the frequency of ultrasonic excitation signal, realizes Frequency from motion tracking so that transducer always works in resonant condition, improves the efficiency of system.

2. Intelligence Ultrasound physiotherapy equipment according to claim 1, it is characterised in that：The power supply module (1) includes a 220V Exchange turns direct current 15V power modules (101), and the 220V exchanges turn direct current 15V power modules (101) and are connected with a level conversion Module (102).

3. Intelligence Ultrasound physiotherapy equipment according to claim 2, it is characterised in that：The output center of the Intelligence Ultrasound physiotherapy equipment Frequency can be double frequency or multifrequency.

4. Intelligence Ultrasound physiotherapy equipment according to claim 3, it is characterised in that：The temperature control modules (8) are including one Temperature sampling circuit (801), the temperature sampling circuit (801) connects thermal-shutdown circuit (802) and microcontroller (301).

5. Intelligence Ultrasound physiotherapy equipment according to claim 4, it is characterised in that：The touch-screen (201) and state instruction Lamp (202) is connected on described microcontroller (301)；The described micro- place of described level switch module (102) connection Reason device (301), by voltage of the direct current 15V voltage conversions for needed for described main control module (3) and human-computer interaction module (2)；Institute The 220V exchanges stated turn direct current 15V power modules (101) and are also connected with push-pull power amplifier circuit (503), are described push-pull power amplifier electricity Road (503) provides power supply.