An ultrasonic treatment head with a crystal oscillator, an ultrasonic treatment device and a driving method

Abstract

An ultrasonic treatment head with a crystal oscillator, an ultrasonic treatment device and a driving method, wherein the ultrasonic treatment head with the crystal oscillator comprises a treatment head body, the treatment head body comprises: a crystal oscillator for outputting an excitation clock signal consistent with a resonance frequency of an ultrasonic transducer in the treatment head body, and sending to an ultrasonic treatment host; and the ultrasonic transducer for receiving a driving signal processed by the ultrasonic treatment host from the excitation clock signal of the crystal oscillator to output ultrasonic pulses. The application also comprises an ultrasonic treatment device and a driving method. The application can precisely excite each transducer with corresponding frequency, greatly improves the electro-acoustic conversion efficiency, and the circuit is simple and reliable, low in cost, greatly reduces the failure rate, and is easy to popularize and apply on a large scale.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic treatment, in particular to an ultrasonic treatment head with a crystal oscillator, an ultrasonic treatment device and a driving method. BACKGROUND

[0002] Ultrasonic treatment is to promote the rehabilitation of certain diseases by using the mechanical effect, thermal effect and physical and chemical effect of ultrasound. The ultrasonic treatment device treats the human body mainly by exciting the ultrasonic transducer through the high-voltage pulse signal inside the ultrasonic treatment device, converting the electrical signal into mechanical wave through the piezoelectric effect of the ultrasonic transducer, and then transmitting to the human tissue through the coupling process, so as to realize the three effects of ultrasonic energy on human tissue and achieve the treatment purpose.

[0003] In actual use, exciting the ultrasonic transducer is a very core technology, and the quality of the excitation signal determines the output quality of the ultrasonic wave. Since the Q value of the ultrasonic transducer used for treatment is very high, and due to the manufacturing process of the transducer, the resonant frequency of each ultrasonic transducer has a slight difference. If the resonant frequency for driving the transducer has a deviation of 0.5%, the output power will be attenuated by more than-6dB, resulting in insufficient acoustic power output. Therefore, it is impossible to use a fixed driving frequency to adapt to each different ultrasonic transducer in the ultrasonic driving frequency, and the driving frequency must be adjusted according to the actual resonant frequency of the transducer. Therefore, the ultrasonic treatment device generally uses a direct frequency synthesizer to identify the resonant frequency of the ultrasonic transducer in an adaptive manner. Through this way, different frequency excitation signals are generated to excite different ultrasonic transducers connected to the host.

[0004] However, the devices using these two ways of adaptive frequency adjustment must use high-cost high-frequency DDS chips to achieve the smallest frequency interval in the megahertz level, and then cooperate with complex current-voltage phase detection circuits, which greatly increases the cost of the ultrasonic treatment device, and due to the increase in the complexity of the circuit, the probability of failure will also increase. How to design a low-cost ultrasonic treatment device that can adapt to different transducers has become a practical design scheme.

[0005] CN110935112A discloses an ultrasonic treatment device and method thereof using mixing technology, which comprises an ultrasonic treatment device main controller for control and detection, a clock generator for generating different frequency timing signals, a buffer for power amplification of the timing signals, a power amplifier for further power amplification of the timing signals, an ultrasonic transducer for ultrasonic emission, a voltage dividing circuit for picking up the ultrasonic transducer loading signal, a mixer for signal mixing, and an operational amplifier for amplifying the mixer processing signal. However, this patent is to determine the resonance frequency of the ultrasonic transducer by mixing, that is, to solve the problem of how to find the resonance frequency. The concept of the present application is different from that of the present application, which is to achieve the purpose of exciting each transducer in a simple and low-cost manner based on the known resonance frequency.

[0006] CN103157197B discloses an ultrasonic treatment device, which comprises a power module, a control module, a display module, an excitation signal generating module, a plurality of drive modules and a plurality of ultrasonic transducers. Each drive module is connected to one ultrasonic transducer. The control module is connected to the display module. The control module, the excitation signal generating module, the drive module and the ultrasonic transducer are connected in sequence. The power module is connected to the display module, the control module, the excitation signal generating module and the drive module, respectively. However, this prior art generates the excitation signal of the transducer inside the device and uses an FPGA chip to generate different frequency drive waveforms by direct frequency division of the FPGA to excite different transducers. However, the FPGA chip is high in cost, and to achieve a frequency span of 0.5% above 1MHz, an internal clock above 185MHz needs to be generated inside the FPGA, which has high requirements for the internal design of the FPGA. In addition, the core of this technology is to drive multiple transducers, which is different from the purpose of driving a single transducer in the present application. SUMMARY

[0007] The purpose of the present application is to overcome the above-mentioned deficiencies of the prior art and provide an ultrasonic treatment head with a crystal oscillator, an ultrasonic treatment device and a driving method, which are simple in structure, low in cost and strong in universality.

[0008] The technical solution of the present application is:

[0009] The ultrasonic treatment head with a crystal oscillator comprises a treatment head body, wherein the treatment head body comprises:

[0010] The crystal oscillator is used to output an excitation clock signal consistent with the resonance frequency of the ultrasonic transducer in the treatment head body and send it to the ultrasonic treatment host;

[0011] The ultrasonic transducer is used for receiving a driving signal processed by the ultrasonic treatment host machine from the excitation clock signal sent by the crystal oscillator, to output ultrasonic pulses.

[0012] Further, the crystal oscillator is an active crystal oscillator, and an output frequency thereof is determined by a resonant frequency of the ultrasonic transducer.

[0013] The ultrasonic treatment device comprises an ultrasonic treatment host machine and the ultrasonic treatment head with the crystal oscillator according to any one of the preceding aspects.

[0014] The ultrasonic treatment head is electrically connected to the ultrasonic treatment host machine, and the ultrasonic treatment host machine supplies power to the crystal oscillator in the ultrasonic treatment head, so that the crystal oscillator outputs an excitation clock signal consistent with the resonant frequency of the ultrasonic transducer to the ultrasonic treatment host machine.

[0015] The ultrasonic treatment host machine is used for receiving the excitation clock signal output by the crystal oscillator in the ultrasonic treatment head, and sequentially performing filtering, shaping and amplification on the excitation clock signal to form a high-voltage sinusoidal wave signal to drive the ultrasonic transducer and output ultrasonic pulses.

[0016] Further, the ultrasonic treatment host machine comprises:

[0017] The clock receiving port is used for receiving the excitation clock signal consistent with the resonant frequency of the ultrasonic transducer output by the crystal oscillator in the ultrasonic treatment head.

[0018] The filter shaping circuit is used for filtering and shaping the received excitation clock signal, converting the shaped clock signal into a square wave signal, and delivering the square wave signal to the driving circuit.

[0019] The driving circuit is used for power amplifying the square wave signal, forming a high-voltage sinusoidal wave signal to drive the ultrasonic transducer, realizing electroacoustic conversion, and making the ultrasonic transducer output ultrasonic pulses.

[0020] Further, the filter shaping circuit comprises:

[0021] The band-pass filter is used for filtering out power supply noise and high-frequency coupling noise in the excitation clock signal.

[0022] The comparator circuit is used for converting the filtered excitation clock signal into a square wave signal to drive the rear-end circuit.

[0023] Further, the driving circuit comprises a tri-state gate circuit, which is controlled by the MCU of the ultrasonic treatment host machine to be turned on or turned off, power amplifies the converted square wave signal, forms a high-voltage sinusoidal wave signal to drive the ultrasonic transducer, realizes electroacoustic conversion, and makes the ultrasonic transducer output ultrasonic pulses.

[0024] The application discloses a driving method of an ultrasonic treatment device.

[0025] S1: connecting at least one ultrasonic treatment head to an ultrasonic treatment host, and powering a crystal oscillator in the ultrasonic treatment head by the ultrasonic treatment host; after the crystal oscillator is powered, outputting an excitation clock signal consistent with a resonance frequency of an ultrasonic transducer in the ultrasonic treatment head, and sending the excitation clock signal to a clock receiving port of the ultrasonic treatment host;

[0026] S2: filtering and shaping the received excitation clock signal by the ultrasonic treatment host, and converting the excitation clock signal into a square wave signal.

[0027] S3: power amplifying the square wave signal after shaping, forming a high-voltage sinusoidal wave signal to drive the ultrasonic transducer, realizing electroacoustic conversion, and making the ultrasonic transducer output ultrasonic pulses.

[0028] Further, when two or more ultrasonic treatment heads are connected to the ultrasonic treatment host, the excitation clock signals sent by the crystal oscillators of the ultrasonic treatment heads to the ultrasonic treatment host are all resonance frequencies of the ultrasonic transducers in the ultrasonic treatment heads, and the ultrasonic treatment host excites the ultrasonic transducers of the corresponding ultrasonic treatment heads according to the different excitation clock signals.

[0029] The application has the following beneficial effects: the resonance frequency clock signal of the ultrasonic transducer is generated by the crystal oscillator of the ultrasonic treatment head, and the excitation clock signal is not generated by the host through DDS frequency division or fixed frequency, so that the host can accurately adapt to the resonance frequency of each treatment head transducer, realize the highest efficiency of electroacoustic conversion, and the cost is extremely low, the electronic components cost of the crystal oscillator and the filtering and shaping circuit is not high, compared with DDS and phase detection equipment, the cost is only 5% or less, and the involved components are less, without increasing the related phase detection circuit, the circuit is simple and reliable, the failure rate can be greatly reduced, and the application can be easily popularized on a large scale. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a circuit structure schematic block diagram of the embodiment 2 of the application. DETAILED DESCRIPTION

[0031] The application will be further described in detail below by combining the drawings in the specification and specific embodiments.

[0032] Embodiment 1

[0033] An ultrasonic treatment head with a crystal oscillator, comprising a treatment head body, the treatment head body comprising a crystal oscillator and an ultrasonic transducer, the crystal oscillator being an active fixed frequency clock output device, the output frequency of which is determined according to the resonant frequency of the ultrasonic transducer; for example, if the frequency of the transducer is 1.118 MHz, then the crystal oscillator is determined to output a 1.118 MHz clock signal. The ultrasonic transducer is used to perform electroacoustic conversion to generate ultrasonic pulses.

[0034] The above scheme has the following advantages: the embodiment does not set a driving frequency clock generator at the ultrasonic treatment host end, but places an active crystal oscillator inside the ultrasonic treatment head according to the actual resonant frequency of the ultrasonic transducer of each ultrasonic treatment head, the output frequency of the active crystal oscillator being the resonant frequency of the ultrasonic transducer, so that when the ultrasonic treatment head is connected to the ultrasonic treatment host, the host does not need to generate an excitation clock signal through DDS frequency division or fixed frequency, so that the host can accurately adapt to the resonant frequency of the ultrasonic transducer of each treatment head body, achieving the highest efficiency of electroacoustic conversion, and the cost is extremely low, i.e. the cost of the crystal oscillator is low, which is only 5% or less of the cost of the existing DDS and phase detection device; at the same time, the circuit is simple and involves few devices, which can greatly reduce the failure rate and be easily implemented on a large scale.

[0035] Embodiment 2

[0036] As shown in Figure 1 An ultrasonic treatment device, comprising an ultrasonic treatment host and the ultrasonic treatment head in embodiment 1, the number of ultrasonic treatment heads can be one or more, and each ultrasonic treatment head is electrically connected to the ultrasonic treatment host.

[0037] The ultrasonic treatment host comprises a clock receiving port, a filter shaping circuit and a driving circuit. The clock receiving port is used to receive the excitation clock signal output by the internal crystal oscillator of the ultrasonic treatment head, which is consistent with the resonant frequency of the ultrasonic transducer; the filter shaping circuit is used to filter and shape the received excitation clock signal, to change the shaped clock signal into a square wave signal and deliver it to the driving circuit; the driving circuit is used to perform power amplification on the square wave signal and form a high-voltage sinusoidal wave signal to drive the ultrasonic transducer, to realize electroacoustic conversion and make the ultrasonic transducer output ultrasonic pulses.

[0038] The implementation process of the above circuit is as follows:

[0039] S1: When the ultrasonic treatment head is connected to the ultrasonic treatment host, the ultrasonic treatment host supplies power to the internal crystal oscillator of the treatment head body.

[0040] After the crystal oscillator is powered on, it outputs an excitation clock signal consistent with the resonant frequency of the ultrasonic transducer. The signal is received by the ultrasonic treatment host through the clock receiving port of the ultrasonic treatment host.

[0041] S2: Because of filtering noise signal in the circumvention environment, the excitation clock signal cannot be used to directly control the driving circuit, and must be filtered and shaped before it can be realized. The signal filtering in the filter shaping circuit uses a band-pass filter to filter out unwanted power supply noise and high-frequency coupled noise, making the clock signal edge smooth, without burr and oscillation. After filtering, the excitation clock signal needs to be shaped to become a square wave signal to drive the back-end circuit, therefore, the shaping circuit preferably uses a comparator circuit to change the filtered excitation clock signal into a square wave signal for driving the back-end circuit part.

[0042] S3: After the shaped clock signal becomes a square wave signal, it is controlled by a tri-state gate to drive, and the on-off control of the tri-state gate is manipulated by the MCU of the ultrasonic treatment host. The driving circuit mainly amplifies the power of the clock signal and forms a high-voltage sinusoidal wave signal to drive the ultrasonic transducer, realizes electro-acoustic conversion, and makes the ultrasonic transducer output ultrasonic pulses.

[0043] It can be understood that when the ultrasonic treatment host is connected to multiple ultrasonic treatment heads, the clock signal sent by the crystal oscillator of each ultrasonic treatment head to the ultrasonic treatment host is the resonant frequency of the ultrasonic transducer in the treatment head body itself, and the ultrasonic treatment host only needs to use this frequency signal to accurately excite the transducers of different ultrasonic treatment heads, greatly improving the electro-acoustic conversion efficiency. For example, the ultrasonic treatment host is connected to 3 ultrasonic treatment heads, and the resonant frequencies of the ultrasonic transducers inside each ultrasonic treatment head are 1.118MHz, 1.125MHz and 1.099MHz respectively, then 1.118MHz, 1.125MHz and 1.099MHz crystal oscillators are integrated in the 3 ultrasonic treatment heads respectively; after being connected to the ultrasonic treatment host, the ultrasonic treatment host directly uses the crystal oscillator clock in the treatment head body to generate an excitation clock signal to drive ultrasonic transducers of different frequencies. That is, if a 1.118MHz ultrasonic treatment head is connected, the excitation clock signal obtained by the ultrasonic treatment host from the treatment head is the excitation clock signal generated by the 1.118MHz crystal oscillator, and then the host will process the excitation clock signal to drive the 1.118MHz ultrasonic transducer; similarly, if a 1.099MHz ultrasonic treatment head is connected, the excitation clock signal obtained by the ultrasonic treatment host is the excitation clock signal generated by the 1.099MHz crystal oscillator, and then the host will process the excitation clock signal to drive the 1.099MHz ultrasonic transducer.

[0044] In summary, the application does not need to set a driving frequency clock generator at the host end of the ultrasonic treatment, but according to the actual resonant frequency of each ultrasonic treatment head transducer, an active crystal oscillator is placed inside the ultrasonic treatment head, and the output frequency of the active crystal oscillator is the resonant frequency of the transducer; when the treatment head is connected to the ultrasonic treatment host, the treatment head sends an excitation clock signal to the host, the host filters and shapes the signal, and then drives the ultrasonic transducer excitation circuit to excite the transducer. In this way, since the crystal oscillator of each ultrasonic transducer sends the host its own resonant frequency, the host only needs to use the frequency signal to accurately excite each transducer, thereby improving the electro-acoustic conversion efficiency; at the same time, the clock output mode of the crystal oscillator has a very low cost compared with the DDS device, and does not need to increase the related phase detection circuit, so the circuit is simple and reliable, greatly reduces the failure rate, and is easy to popularize and apply on a large scale.

Claims

1. An ultrasonic treatment device, characterized in that, The ultrasonic treatment head comprises an ultrasonic treatment main machine and an ultrasonic treatment head with a crystal oscillator. The ultrasonic treatment head comprises a treatment head body, and a crystal oscillator and an ultrasonic transducer integrated in the treatment head body; the crystal oscillator is an active crystal oscillator, used to output an excitation clock signal consistent with the resonance frequency of the ultrasonic transducer in the treatment head body, and send to the ultrasonic treatment main machine; the output frequency of the crystal oscillator is determined by the resonance frequency of the ultrasonic transducer; the ultrasonic transducer is used to receive a driving signal processed by the ultrasonic treatment main machine from the excitation clock signal sent by the crystal oscillator, and output an ultrasonic pulse; the number of the ultrasonic treatment heads is one or more, and the ultrasonic treatment heads are electrically connected with the ultrasonic treatment main machine, and the crystal oscillator in the ultrasonic treatment head is powered by the ultrasonic treatment main machine; after the crystal oscillator is powered on, the excitation clock signal consistent with the resonance frequency of the ultrasonic transducer is output and sent to the ultrasonic treatment main machine; The ultrasonic treatment main machine is used to receive the excitation clock signal output by the crystal oscillator in the ultrasonic treatment head, and form a high-voltage sinusoidal wave signal after filtering, shaping and amplifying the excitation clock signal in sequence, to drive the ultrasonic transducer and output an ultrasonic pulse; the ultrasonic treatment main machine comprises: a clock receiving port, used to receive the excitation clock signal output by the crystal oscillator in the ultrasonic treatment head and consistent with the resonance frequency of the ultrasonic transducer; a filtering and shaping circuit, used to filter and shape the received excitation clock signal, convert the shaped clock signal into a square wave signal, and send to a driving circuit; a driving circuit, used to power amplify the square wave signal, form a high-voltage sinusoidal wave signal to drive the ultrasonic transducer, realize electroacoustic conversion, and make the ultrasonic transducer output an ultrasonic pulse.

2. The ultrasonic treatment device of claim 1, wherein, The filtering and shaping circuit comprises: a band-pass filter, used to filter out power supply noise and high-frequency coupling noise in the excitation clock signal; a comparator circuit, used to convert the filtered excitation clock signal into a square wave signal to drive a rear-end circuit.

3. The ultrasonic treatment device of claim 1, wherein, The driving circuit comprises a three-state gate circuit, which is controlled by the MCU of the ultrasonic treatment main machine to be turned on or off; the converted square wave signal is power amplified, a high-voltage sinusoidal wave signal is formed to drive the ultrasonic transducer, electroacoustic conversion is realized, and the ultrasonic transducer outputs an ultrasonic pulse.

4. A driving method of the ultrasonic treatment apparatus according to claim 1, characterized by, The method comprises the following steps: S1: connecting at least one ultrasonic treatment head to the ultrasonic treatment main machine to power the crystal oscillator in the ultrasonic treatment head by the ultrasonic treatment main machine; after the crystal oscillator is powered on, an excitation clock signal consistent with the resonance frequency of the ultrasonic transducer in the ultrasonic treatment head is output and sent to the clock receiving port of the ultrasonic treatment main machine; S2: filtering and shaping the received excitation clock signal by the ultrasonic treatment main machine, and converting the shaped clock signal into a square wave signal; S3: power amplifying the shaped square wave signal, forming a high-voltage sinusoidal wave signal to drive the ultrasonic transducer, realizing electroacoustic conversion, and making the ultrasonic transducer output an ultrasonic pulse.

5. The method of driving the ultrasonic treatment apparatus according to claim 4, wherein When two or more ultrasonic treatment heads are connected to the ultrasonic treatment main machine, the excitation clock signals sent by the crystal oscillators of the ultrasonic treatment heads to the ultrasonic treatment main machine are the resonance frequencies of the ultrasonic transducers in the ultrasonic treatment heads, and the ultrasonic treatment main machine excites the ultrasonic transducers of the corresponding ultrasonic treatment heads according to different excitation clock signals.

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