CN103977508B - Smart ultrasonic physical therapy instrument - Google Patents
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- CN103977508B CN103977508B CN201410175287.1A CN201410175287A CN103977508B CN 103977508 B CN103977508 B CN 103977508B CN 201410175287 A CN201410175287 A CN 201410175287A CN 103977508 B CN103977508 B CN 103977508B
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Abstract
The invention discloses a smart ultrasonic physical therapy instrument which is composed of a power module, a master control module, a DDS module, an amplification module, a frequency tracking module, a man-machine interaction module, a therapy head module and a temperature control module. The smart ultrasonic physical therapy instrument further has a professor therapy prescription function, has the advantages of being simple in structure, capable of automatically tracking frequency, high in stability, multiple in frequency, high in output power, easy to operate, and the like, and can be widely applied to external physical therapy for patients with organic cardiovascular diseases and patients with sport injuries.
Description
Technical field
The present invention relates to a kind of Intelligence Ultrasound physiotherapy equipment, and in particular to one kind is used for organic cardiovascular patient, motion
The high-tech ultrasound physiotherapy equipment of the traumatic external physical treatment of patient.
Background technology
Ul-trasonic irradiation can produce certain biological effect, such as mechanical effect, thermogenetic effect, cavitation effect in tissue
Deng certain therapeutic purposes, that is, so-called ultrasonic physiotherapy can be reached using these effects.
Ultrasonic wave pad value in biological tissues increases with frequency near-linear, i.e., frequency is bigger, and attenuation coefficient is got over
Greatly, decay faster, it is different that different supersonic frequencies will cause ultrasonic signal to enter human depth；On the other hand, it is excessive
Ultrasonic Radiation human body can be damaged, the ultrasonic signal using various dose is considered as different therapentic parts.
The more popular most table structure of sonicator is similar on domestic market, and it is low to there is automaticity, behaviour
Make numerous and diverse, can adjust that acoustic power range is narrow, the common defects such as automatic protection functions are weak.
Ultrasonic physiotherapy equipment is more at present using single-frequency, the technical scheme of fixed frequency, this frequency be it is fixed, it is immutable
's.Its therapentic part of single-frequency is limited, when patient needs multiple site treatment, it is necessary to which equipment in addition is completed.Controlling
During treatment, due to differences such as temperature, environment, the resonant frequency of ultrasonic therapeutic head is caused to change, due to current ultrasound
Modality does not possess automatic frequency tracking function, will frequency of occurrences imbalance, so as to impedance mismatching can be caused, reduce efficiency,
Serious cisco unity malfunction.
The existing most trivial operations of ultrasonic physiotherapy equipment, do not have expert treatment side function, and therapeutic frequency is generally single and fixed
1MHz or 3MHz, output acoustic power is within 2W/cm2, and single therapy head, treatment head effective area is smaller.Accidental double frequency
The physiotherapy equipment of double treatment heads, effective treatment area difference of itself 1MHz and 3MHz treatment head is larger, and output acoustic power is smaller, does not have
Standby automatic frequency tracking function.
The content of the invention
To overcome deficiency of the prior art, it is an object of the invention to provide a kind of intelligent double-frequency or the ultrasound of multi-frequency
Physiotherapy equipment, the Intelligence Ultrasound physiotherapy equipment is it is possible to prevente effectively from shortcoming of the prior art.
In order to solve the above-mentioned technical problem, above-mentioned purpose is realized, the present invention is achieved through the following technical solutions：
A kind of Intelligence Ultrasound physiotherapy equipment, including power supply module, human-computer interaction module, main control module, DDS module, power amplifier mould
Block, treatment head module, frequency tracking module and temperature control modules；
The power supply module includes that 220V exchanges turn direct current 15V power modules, and the 220V exchanges turn direct current 15V power supplys
Module is connected to a level switch module and push-pull power amplifier circuit；220V exchanges turn direct current 15V power modules will be exchanged
220V is converted into direct current 15V for providing power supply to push-pull power amplifier circuit；Level switch module, be by direct current 15V voltage conversions
Various voltages needed for main control module and human-computer interaction module.In another embodiment, power supply module may include chargeable
Polymer battery.
The human-computer interaction module includes touch-screen and state display lamp；Various treatment ginsengs can be set by touch-screen
Number, while expert treatment side function is may call upon, it is easy to operate, directly perceived, succinct；Status indicator lamp is used for display physiotherapy equipment in real time
Running status.
The main control module includes a microprocessor, and the microprocessor is connected with a DDS circuit, duty cycle adjustment electricity
Road, digital potentiometer, frequency error factor and match circuit, phase difference detecting circuit, temperature sampling circuit and thermal-shutdown circuit；It is micro-
The main treatment parameter set according to user of processor, in the range of the total technical index of equipment, controls ultrasonic therapy head mould
Block output meets desired ultrasonic signal, and stabilizes it, reliably works；
The DDS module includes that a DDS occurs circuit, and the output end that the DDS occurs circuit connects LPF electricity
Road, the output end of the low-pass filter circuit connects a duty ratio adjusting circuit, the duty ratio adjusting circuit and microprocessor
It is connected；DDS occurs circuit to be used to produce original ultrasonic excitation signal, is realized using Direct Digital Frequency Synthesizers, with frequency
Rate is easy to adjust, high resolution, frequency switching time is short, output phase is continuous, it is totally digitilized and easy to control the advantages of；Low pass
Filter circuit is used to filter the harmonic wave interference of DDS generation circuit outputs, and harmonic wave interference selects 7 rank bars essentially from reference clock
Te Wozi low pass filters, butterworth filter has most flat amplitude versus frequency characte in passband, and rate of decay compares
Hurry up；Duty ratio adjusting circuit is used for the dutycycle of controlled output ultrasonic signal, and microcontroller is by controlling duty cycle adjustment electricity
Road adjusts the dutycycle of ultrasonic excitation signal, so as to realize the control to exporting ultrasonic signal dutycycle.
Described power amplifier module includes one-level amplifying circuit, the in-phase input end connection dutycycle of the one-level amplifying circuit
The output end of circuit is adjusted, realization is tentatively amplified to the pumping signal after duty ratio modulation；The one-level amplifying circuit
Inverting input connects a digital potentiometer, and the size of inverting resistance, the size of controlled output signal, warp are accessed by adjusting
Later continue and amplify with the final control realized to treating intensity, described digital potentiometer is connected with microprocessor, the one-level
The output end connection second amplifying circuit of amplifying circuit, the second amplifying circuit output end connects a push-pull power amplifier circuit；DDS
The pumping signal that circuit generation occurs is very faint, it is necessary to could drive ultrasonic transducer by power amplification；One-level amplifying circuit
The preliminary amplification to pumping signal is realized, second amplifying circuit is further amplified to the output of one-level amplifying circuit, exports several W
Power, is finally amplified by push-pull power amplifier circuit again, power output drive signal, promotes transducer work；Microcontroller
By the multiplication factor for controlling one-level power amplifier（End of oppisite phase accesses resistance sizes）To realize the adjustment to power output.
The treatment head is one or more, and preferably 2-8 is individual, and with adsorption element, for treatment head absorption to be existed
Therapentic part.Adsorption element is the adsorption cover of approximate cone-shape, and binding domain can be circular or oval.Made by suction function
Ultrasonic therapeutic head and therapentic part close contact, and can be by the work that adjusts the size of absorption affinity to regulate and control treatment head and human body
Use pressure.
The treatment head module includes the input of a frequency error factor and match circuit, the frequency error factor and match circuit
Connect the output end of push-pull power amplifier circuit；The frequency error factor is also connected with microprocessor with the input of match circuit；The frequency
Rate switching is connected a transducer with the output end of match circuit；Frequency error factor has two with the effect of match circuit：One be for
Realize the switching of multiple centre frequencies, such as 1MHz, 2MHz, 3MHz；Two is impedance matching, transducer is operated in series resonance
Pure resistance state, improves the efficiency of equipment；Transducer is used for electric energy（Ultrasound drive signals）It is converted into mechanical energy（Ultrasonic wave）Output.
Echo transducer can be provided with the treatment head, be used to monitor the transmission depth of focus of ultrasound, be easy to user
Debugged, and then selected appropriate therapeutic frequency.
The frequency tracking module includes a current-voltage sampling circuit, and the input of the current-voltage sampling circuit connects
Connect transducer；The output end of the current-voltage sampling circuit connects a phase difference detecting circuit, the phase difference detecting circuit
Output end connection microcontroller；Current-voltage sampling circuit is used to obtain the phase size of voltage and current in transducer；Phase
Difference detecting circuit is used to judge the phase difference of voltage and current signal, and microcontroller adjusts frequency according to the size of phase difference, from
And realize frequency from motion tracking.
The temperature control modules include a temperature sampling circuit, temperature sampling circuit connection thermal-shutdown circuit and
Microcontroller；Temperature sampling circuit uses thermistor, in ultrasonic therapy head module, near transducer, microprocessor
After collecting temperature, judge whether to exceed the secure threshold of setting, if overtemperature, control thermal-shutdown circuit cut-out output, it is ensured that
User's safety.
The described microprocessor of described level switch module connection, described 220V exchanges turn direct current 15V power modules
Connection push-pull power amplifier circuit.
The touch-screen and status indicator lamp are connected on described microcontroller.
Multimode Control module includes the expert treatment side for pre-setting, and can be called by human-computer interaction module, and expert treats
Policy pre-sets different frequencies or combination of frequency, watt level, treatment time parameter to different diseases.
Described expert treats and can carry out different settings to the output frequency of each ultrasonic launching head and power, to cause
Depth, section, cross-sectional sizes around the effect of center therapentic part are optimized.
Compared with prior art, the invention has the advantages that：
（1）Output ultrasonic wave can have multiple centre frequencies, and the continuously adjustabe in the range of 0.5-3.5MHz, exportable company
Continuous ripple and impulse wave, 10-100% is adjustable for impulse waveform dutycycle, multiple treatment head outputs, easy to use；
The ultrasonic excitation signal of multiple centre frequencies, and the continuously adjustabe in the range of 0-3.5MHz can be produced, can be with defeated
Go out continuous wave and impulse waveform, 10-100% is adjustable for impulse waveform dutycycle, treatment time 0-30 minutes adjustable；
（2）Ultrasonic therapeutic head effective radiating area is 3-9 cm2, preferably 5cm2, effective output sound intensity≤3W/cm2；It is defeated
Go out acoustical power high, user's selectable range is big；Ultrasonic therapeutic head has multiple, can carry out multiple positions and treat simultaneously；
（3）With automatic frequency tracking function, transducer is always worked near resonance point, improve device efficiency and make
User's comfort level；
(4) on-line temperature monitoring, overheat protector function；According to the difference using object, can be to temperature safety threshold value
It is finely adjusted, improves therapeutic effect；
（5）With expert treatment side function, man-machine interaction is carried out using touch-screen, it is simple, convenient, directly perceived.
Described above is only the general introduction of technical solution of the present invention, in order to better understand technological means of the invention,
And can be practiced according to the content of specification, below with presently preferred embodiments of the present invention and coordinate accompanying drawing describe in detail as after.
Specific embodiment of the invention is shown in detail by following examples and its accompanying drawing.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, this hair
Bright schematic description and description does not constitute inappropriate limitation of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is overall framework figure of the invention.
Fig. 2 is the circuit theory diagrams of DDS module of the invention.
Fig. 3 is the circuit theory diagrams of power amplifier module of the invention.
Fig. 4 is the circuit theory diagrams for the treatment of head module of the invention.
Fig. 5 is the circuit theory diagrams of frequency tracking module of the invention.
Fig. 6 is the circuit theory diagrams of frequency tracking module of the invention.
Specific embodiment
Technology implementation process of the invention is described further with reference to the accompanying drawings and examples.
Embodiment 1：
It is shown in Figure 1, a kind of intelligent double-frequency ultrasound physiotherapy equipment, including power supply module 1, human-computer interaction module 2, master control mould
Block 3, DDS module 4, power amplifier module 5, treatment head module 6, frequency tracking module 7 and temperature control modules 8；
The power supply module 1 includes that 220V exchanges turn direct current 15V power modules 101, and the 220V exchanges turn direct current 15V
Power module 101 is connected with a level switch module 102；220V exchanges turn direct current 15V power modules 101 and change alternating current 220V
It is used to provide power supply to push-pull power amplifier circuit 503 into direct current 15V；Level switch module 102, based on direct current 15V voltage conversions
Various voltages needed for control module 3 and human-computer interaction module 2.
The human-computer interaction module 2 includes touch-screen 201 and state display lamp 202；Can be set respectively by touch-screen 201
Plant treatment parameter, such as treatment time, therapeutic frequency, treatment intensity and dutycycle etc.；Expert is may call upon simultaneously treats Fang Gong
Can, it is easy to operate, directly perceived, succinct；Status indicator lamp 202 is used for the running status of display physiotherapy equipment in real time.
The main control module 3 includes a microprocessor 301, and the microprocessor 301 is connected with a DDS circuit 401, duty
Than regulation circuit 403, digital potentiometer 504, frequency error factor and match circuit 601, phase difference detecting circuit 702, temperature sampling
Circuit 801 and thermal-shutdown circuit 802；The main treatment parameter set according to user of microprocessor, in the general technical of equipment
In indication range, control ultrasonic therapy head module output meets desired ultrasonic signal, and stabilizes it, reliably works；
The DDS module 4 includes that a DDS occurs circuit 401, and the output end that the DDS occurs circuit 401 connects a low pass
Filter circuit 402, the output end of the low-pass filter circuit 402 connects a duty ratio adjusting circuit 403, the duty cycle adjustment
Circuit is connected with microprocessor 301；DDS occurs circuit 401 to be used to produce original ultrasonic excitation signal, using Direct Digital frequently
Rate synthesizer realizes, with frequency is easy to adjust, high resolution, frequency switching time is short, output phase is continuous, it is totally digitilized and
Easy to control the advantages of；Low-pass filter circuit 402 is used to filter the harmonic wave interference of DDS generation circuit outputs, and harmonic wave interference is main
From reference clock, select 7 rank Butterworth lowpass filters, butterworth filter that there is most flat width in passband
Frequency characteristic, and rate of decay is than very fast；Duty ratio adjusting circuit 403 is used for the dutycycle of controlled output ultrasonic signal, micro-control
Device processed 301 adjusts the dutycycle of ultrasonic excitation signal by controlling duty ratio adjusting circuit 403, so as to realize to output ultrasound letter
The control of number dutycycle.
Described power amplifier module 5 includes one-level amplifying circuit 501, and the in-phase input end connection of the one-level amplifying circuit is accounted for
The empty output end than adjusting circuit 403, realization is tentatively amplified to the pumping signal after duty ratio modulation；The one-level is amplified
The inverting input of circuit connects a digital potentiometer 504, and the size of inverting resistance, controlled output signal are accessed by adjusting
Size, amplify with the final control realized to treating intensity, described digital potentiometer 504 and microprocessor phase by follow-up
Connect 301, the output end connection second amplifying circuit 502 of the one-level amplifying circuit, the output end of the second amplifying circuit 502 connects
Connect a push-pull power amplifier circuit 503；The pumping signal that DDS occurs the generation of circuit 401 is very faint, it is necessary to could be driven by power amplification
Dynamic ultrasonic transducer；One-level amplifying circuit 501 realizes the preliminary amplification to pumping signal, and second amplifying circuit 502 is put to one-level
Big circuit output is further amplified, and exports a few W power, is finally amplified by push-pull power amplifier circuit 503 again, output work
Rate drive signal, promotes transducer work；Microcontroller 301 is by controlling the multiplication factor of one-level power amplifier（End of oppisite phase accesses electricity
Resistance size）To realize the adjustment to power output.
The treatment head module 6 includes a frequency error factor and match circuit 601, the frequency error factor and match circuit 601
Input connection push-pull power amplifier circuit 503 output end；The frequency error factor is also connected with micro- place with the input of match circuit
Reason device 301；The frequency error factor is connected a transducer 602 with the output end of match circuit 601；Frequency error factor and match circuit
601 effect has two：One is the switching for realizing multiple centre frequencies；Two is impedance matching, is operated in transducer 602
The pure resistance state of series resonance, improves the efficiency of equipment；Transducer 602 is used for electric energy（Ultrasound drive signals）It is converted into mechanical energy
（Ultrasonic wave）Output.
The frequency tracking module 7 includes a current-voltage sampling circuit 701, the current-voltage sampling circuit 701
Input connects transducer 602；The output end of the current-voltage sampling circuit 701 connects a phase difference detecting circuit 702, institute
State the output end connection microcontroller 301 of phase difference detecting circuit 702；Current-voltage sampling circuit 701 is used to obtain transducer
The phase size of middle voltage and current；Phase difference detecting circuit 702 is used to judge the phase difference of voltage and current signal, microcontroller
301 according to the size of phase difference, adjusts frequency, so as to realize frequency from motion tracking.
The temperature control modules 8 include a temperature sampling circuit 801, and the connection excess temperature of the temperature sampling circuit 801 is protected
Protection circuit 802 and microcontroller 301；Temperature sampling circuit 801 uses thermistor, in ultrasonic therapy head module, leans on
Nearly transducer, after microprocessor collecting temperature, judges whether to exceed the secure threshold of setting, if overtemperature, controls overheat protector
The cut-out output of circuit 802, it is ensured that user's safety.
Described level switch module 102 connects described microprocessor 301, and described 220V exchanges turn direct current 15V electricity
The connection push-pull power amplifier of source module 101 circuit 503.
The touch-screen 201 and status indicator lamp 202 are connected on described microcontroller 301.
Specifically：
In human-computer interaction module 2, the input and display of touch-screen 201 including customer parameter, using the true color screen of serial ports, with micro-
The serial ports of processor 301 is controlled；Status indicator lamp 202 is mainly used to the running status of real-time display device, by microprocessor
The I/O controls of device 301.
In main control module 3, microprocessor 301 uses the 32-bit microprocessor STM32F103 based on ARM cores of ST companies
Chip, highest 72MHz working frequencies, its built-in 2 12 A/D converters A/D, 2 12 D/A converter D/A, up to
7 timers, with communication interfaces such as SPI, USB, CAN, IIC, USART.Microprocessor 301 is main according to controlling that user sets
Parameter is treated, in the range of the total technical index of equipment, control ultrasonic therapy head module output meets desired ultrasonic signal,
And stabilize it, reliably work.
In power supply module 1, using Sai Side insulating power supply SAS100-15-K, power 100W, input ac voltage scope
165-265VAC, exports direct current 15V voltage signals, and power supply is provided to push-pull power amplifier module and level switch module；Level conversion
Module is respectively completed DC15V-DC12V, DC12V- ± 9V, DC9V-DC5V, DC5V-DC3.3V etc. using multiple DC-DC modules
The conversion of level.
Embodiment 2：
Referring to accompanying drawing 2, microprocessor control DDS integrated chips produce ultrasonic excitation signal, and DDS integrated chips are public using AD
The AD9851 of department, output frequency highest 180MHz, can produce the output signals such as sine wave, square wave and triangular wave, low in energy consumption.It is logical
Universal serial bus connection microprocessor is crossed, using the active crystal oscillators of 50MHz as reference clock, the sine wave exciting signal of output passes through
The low-pass filter circuit of R, L, C composition；Filter the signal after harmonic wave interference and enter duty ratio adjusting circuit；Duty ratio adjusting circuit
It is made up of high-speed analog switch, microprocessor is realized to pumping signal dutycycle by adjusting the dutycycle of input B end signals
Control：During the high level of B ends, fout=fin;During the low level of B ends, fout=GND (0V), within a fixed cycle, regulation height
The time of level, that is, realize the control to pumping signal dutycycle.
Embodiment 3：
Referring to accompanying drawing 3, in power amplifier module, U4 composition one-level amplifying circuits, pumping signal is input into by in-phase end, constitutes same phase
Scaling circuit, multiplication factor determines that microprocessor is by adjusting number by the resistance value of digital potentiometer and the ratio of R3
The size of word potentiometer resistance value, so that the size of controlled output voltage, further realizes the control to power output；U4 is defeated
The power for going out is in 1W or so；C5 is coupled capacitor；Q3 constitute second amplifying circuit, R4, R5 by constituting biasing circuit after partial pressure,
R6, C6 effect are feedback compensations, and power output reaches 5W or so after Q3 amplifies, and push-pull power amplifier electricity is coupled to by transformer T1
Road；V_set1, V_set2 are used for setting the static working current of Q1, Q2, and its size is adjustable in 0-6V, and Q1, Q2 are power MOS
Pipe, T2 is output transformer, and L4 is choking-winding, filters influence of the high frequency to dc source.
Embodiment 4：
Referring to accompanying drawing 4, U6 is frequency error factor relay, and, according to the parameter setting of user, control U6 outputs are or not microprocessor
Same centre frequency,（Such as 1MHz or 3MHz）Ultrasound drive signals；The effect of match circuit is the efficiency of raising system.Change
When energy device occurs series resonance, circuit total impedance is not pure resistance state；On the one hand addition matching inductance or electric capacity make electricity to match circuit
Lu Chengchun resistance states, now the impedance of transducer is minimum；Ultrasound-driven circuit is regarded as a power supply, transducer as load, by
Circuit theory knowledge understands：When the internal resistance of source is equal to load impedance, the power for obtaining is loaded maximum.Match circuit is on the other hand
It is to carry out impedance conversion so that transducer is obtained in that the defeated people of power of maximum, subfunction is realized by transformer T2.According to controlling
The quantity for treating head is set, and U6 can have multiple rate-adaptive pacemaker modules.
Embodiment 5：
Referring to accompanying drawing 5 and 6.Fig. 5 is voltage, the schematic diagram of current sample.Sample circuit can neither influence original main electricity
Road, again can accurate acquisition desired signal, and as far as possible ensure signal it is undistorted.Voltage sample is in high-frequency power transformer T2
Another one group of winding of having mercy on magnetic core, the termination adjustable potentiometer RV of winding two has adjusted the sampled voltage size of output；Current sample
Can be realized by resistance, Hall current sensor or current transformer.Resistance with transducer due to directly connecting, and its resistance is excessive
When can produce extra power attenuation and pressure drop, and resistance is too small, and signal can be made too weak, therefore design comparison is bothered;Hall electricity
Flow sensor ratio of precision is higher, but cost is very high, and applying frequency is relatively low；The present invention carries out electric current and adopts using current transformer
Sample, current transformer T3 is connected between ultrasound drive signals and transducer, and current signal is converted to voltage by power resistor Ri
Signal output.
It is shown in Figure 6, two two zero-crossing comparators of amplifier U7, U8 composition, the sampling electricity of the same frequency that will be input into
Stream, sampled voltage signal are adjusted as synperiodic square-wave signal；U9, U10 are two phase inverters, improve zero-crossing comparator output
Square wave it is front and rear along steepness；U11 is D triggers, and electric current, voltage square wave signal after adjusting are separately input to the D of D triggers
End and CLK ends, if voltage leading current, the Q ends output level Sig_hl of D triggers is logical zero；If electric current is electric in advance
Pressure, then the Q ends output Sig_hl level of D triggers is logical one；The Q ends output level Sig_hl of D triggers is input to
Microprocessor, increaseds or decreases the foundation of frequency when being controlled as microprocessor.Two square-wave signals are also entered into and door simultaneously
U12, obtains embodying the pulse width signal output Sig_ph of phase difference, if voltage and current phase is identical, pulse width signal Sig_
The dutycycle of ph is 50%；If there is phase difference in the two, the dutycycle of the pulse width signal Sig_ph for exporting certainly less than for
50%, the dutycycle Sig_ph of this output is the size for reflecting electric current, voltage phase difference, and Sig_ph signals also enter into micro-
Processor, such microprocessor by continually scanning for Sig_hl, Sig_ph signal, 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.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for the skill of this area
For art personnel, the present invention can have various modifications and variations.It is all within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the 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.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410175287.1A CN103977508B (en) | 2014-04-28 | 2014-04-28 | Smart ultrasonic physical therapy instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410175287.1A CN103977508B (en) | 2014-04-28 | 2014-04-28 | Smart ultrasonic physical therapy instrument |
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| CN103977508A CN103977508A (en) | 2014-08-13 |
| CN103977508B true CN103977508B (en) | 2017-05-24 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104623816A (en) * | 2015-01-26 | 2015-05-20 | 上海爱声生物医疗科技有限公司 | Matrix type probe for ultrasonic physiotherapy instruments |
| CN105577786A (en) * | 2015-12-23 | 2016-05-11 | 张慧霞 | Trauma nursing system for general surgical operation |
| CN107497062B (en) * | 2017-08-31 | 2024-01-23 | 中国科学院苏州生物医学工程技术研究所 | Focusing ultrasonic fat dissolving system based on noninvasive temperature monitoring |
| CN111420308A (en) * | 2020-04-16 | 2020-07-17 | 重庆邮电大学 | Ultrasonic physiotherapy instrument based on frequency automatic tracking and frequency automatic tracking method |
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