CN102641556A - Arbitrary waveform generation method of electric acupuncture apparatus - Google Patents

Abstract

The invention relates to a method for generating an arbitrary waveform of an electroacupuncture instrument, which belongs to the technical field of electronic medical equipment. The main controller of the electroacupuncture instrument obtains the waveform envelope data and pulse type parameters through the touch screen and keyboard, and stores these data in the memory, and then reads these data sequentially from the memory, and sends them to the digital-to-analog converter after processing , The digital-to-analog converter converts these digital waveforms into analog voltages, and after removing high-frequency noise through a low-pass filter, it enters the analog amplifier circuit to achieve the required amplitude. The controller sends out data cyclically, and the desired waveform is generated cyclically.

Description

A Method for Generating Arbitrary Waveform of Electroacupuncture Instrument

technical field

The invention relates to a method for generating an arbitrary waveform of an electroacupuncture instrument, which belongs to the technical field of electronic medical equipment.

Background technique

At present, known electroacupuncture instruments can only generate several specific waveforms, and can adjust the amplitude, frequency and density characteristics of these waveforms, but cannot generate arbitrary waveforms according to the needs of medical staff. Different waveforms have different therapeutic effects on the human body. Because current electroacupuncture instruments are limited to only a few waveforms, it is difficult to have the best curative effect on all patients. On the other hand, a few electroacupuncture instruments that have just been developed have a certain degree of waveform synthesis function, but they are limited to the form of multiplying analog waveforms, which makes the circuit complex and difficult to adjust, and the synthesized waveform has large distortion and less forms.

Contents of the invention

In order to solve the deficiency that the existing electro-acupuncture instruments generate few types of waveforms, the invention provides a method for generating arbitrary waveforms of the electro-acupuncture instruments.

The technical solution adopted by the present invention to solve its technical problems is:

A method for generating an arbitrary waveform of an electroacupuncture instrument. The electroacupuncture instrument includes a main controller of the electroacupuncture instrument, a liquid crystal screen, a touch screen, a keyboard, a memory, a digital-to-analog converter, a low-pass filter, an analog amplifier, and a step-up transformer; the liquid crystal screen, The touch screen and memory are connected to the main controller of the electroacupuncture instrument through data lines and control lines, the keyboard is connected to the IO port of the main controller of the electroacupuncture instrument, the main controller of the electroacupuncture instrument is connected to the digital-to-analog converter, and the output terminal of the digital-to-analog converter is connected to the digital-to-analog converter. The low-pass filter is connected; the signal generated by the digital-to-analog converter is output through the low-pass filter, analog amplifier and step-up transformer in sequence; the specific arbitrary waveform generation method is as follows:

1) Drawing, recording, and displaying

The user draws the desired waveform on the touch screen, and the main controller of the electroacupuncture instrument continuously reads the coordinate values of each point of the waveform on the touch screen; the main controller of the electroacupuncture instrument sets a threshold, removes points exceeding the threshold, that is, accidental interference points, and then The coordinate value data of each point of the waveform is stored in the memory; the display function of the main controller of the electroacupuncture instrument reads the coordinate value data of each point of the waveform from the memory, and draws the waveform required by the user on the liquid crystal display;

2) Waveform data processing

Assume that the height of the waveform at any x-coordinate position is y, and y is the amplitude of the waveform here; the ordinates of the curve are stored in the array wave[] in the order of y1, y2, y3... from front to back, Perform threshold filtering and mean denoising on the data in wave[];

3) Read waveform parameters

The waveform generated by the electroacupuncture instrument is enveloped by the waveform described in wave[]. The main controller of the electroacupuncture instrument reads the parameters input by the user through the keyboard or the soft keyboard on the touch screen, and saves them in the memory of the main controller of the electroacupuncture instrument. middle;

4) Digital modulation and output

Read the values in the pulse function pulse[] in the main controller program of the electroacupuncture instrument sequentially, multiply them with the values in the envelope waveform wave[], and after a delay of t, send them to the digital-to-analog converter for output. The expression is: output=pulse[i]*wave[j]; i and j are program loop variables; the delay time t is obtained by the frequency parameter obtained in step 3); The periodic waveform output is obtained;

5) Filtering and output adjustment

The waveform obtained by the digital-to-analog converter is amplified by the analog amplifier circuit after the high-frequency noise is removed by the low-pass filter, and then boosted by the step-up transformer to obtain the voltage of the output waveform.

The invention has the beneficial effect of providing a scheme for generating arbitrary waveforms for the electroacupuncture instrument. It allows medical personnel to design their own waveforms, and through simple parameter settings, corresponding waveforms can be generated. Avoids the limitations of analog oscillators generating waveforms.

Description of drawings

Fig. 1 is a block diagram of the circuit structure of the present invention.

Figure 2 is a schematic diagram of the waveform generation process.

Among them, 1. keyboard, 2. touch screen, 3. LCD screen, 4. main controller of electroacupuncture instrument, 5. memory, 6. digital-to-analog converter, 7. low-pass filter, 8. analog amplifier, 9. liter Voltage transformer, 10, waveform envelope, 11, pulse waveform, 12, output waveform after digital multiplication.

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

Embodiment: A method for generating arbitrary waveforms of an electroacupuncture instrument, as shown in Figure 1, the electroacupuncture instrument includes a main controller (4), a liquid crystal screen (3), a touch screen (2), a keyboard (1), and a memory (5), digital-to-analog converter (6), low-pass filter (7), analog amplifier (8) and step-up transformer (9); LCD screen (3), touch screen (2), memory (5) pass data The wires and control wires are connected to the main controller (4) of the electroacupuncture instrument, the keyboard (1) is connected to the IO port of the main controller (4) of the electroacupuncture instrument, and the main controller (4) of the electroacupuncture instrument is connected to the digital-to-analog converter (6). ) is connected, and the output terminal of the digital-to-analog converter (6) is connected to the low-pass filter (7); the signal generated by the digital-to-analog converter (6) passes through the low-pass filter (7), the analog amplifier (8) and the booster in sequence Transformer (9) output; The specific arbitrary waveform generation method is as follows:

1) Drawing, recording, and displaying

The user draws the desired waveform on the touch screen, and the main controller of the electroacupuncture instrument (4) continuously reads the coordinate values of each point of the waveform on the touch screen (2); the main controller of the electroacupuncture instrument (4) sets a threshold value to remove the point, that is, the accidental interference point, and then store the coordinate value data of each point of the waveform into the memory (5); the display function of the main controller (4) of the electroacupuncture instrument reads the coordinate value data of each point of the waveform from the memory (5) , and draw the waveform required by the user on the liquid crystal display (3);

2) Waveform data processing

Assume that the height of the waveform at any x-coordinate position is y, and y is the amplitude of the waveform here; the ordinates of the curve are stored in the array wave[] in the order of y1, y2, y3... from front to back, Perform threshold filtering and mean denoising on the data in wave[];

3) Read waveform parameters

The waveform generated by the electroacupuncture instrument is enveloped by the waveform described in wave[]. The main controller (4) of the electroacupuncture instrument reads the parameters input by the user through the keyboard (1) or the soft keyboard on the touch screen (2), and Save it in the memory (5) of the main controller (4) of the electroacupuncture instrument;

4) Digital modulation and output

Read the values in the pulse function pulse[] in the main controller program of the electroacupuncture instrument sequentially, multiply them with the values in the envelope waveform wave[], and send them to the digital-to-analog converter (6) after a delay of t Output, the mathematical expression is: output=pulse[i]*wave[j]; i and j are program loop variables; the delay time t is obtained by the frequency parameter obtained in step 3); the program continuously reads and multiplies , output, the periodic waveform output is obtained;

5) Filtering and output adjustment

The waveform obtained by the digital-to-analog converter (6) is amplified by the analog amplifier circuit (8) after the high-frequency noise is removed by the low-pass filter (7), and then boosted by the step-up transformer (9) to obtain the voltage of the output waveform.

Claims (1)

1. A method for generating an arbitrary waveform of an electroacupuncture instrument. The electroacupuncture instrument comprises a main controller of the electroacupuncture instrument, a liquid crystal screen, a touch screen, a keyboard, a memory, a digital-to-analog converter, a low-pass filter, an analog amplifier, and a step-up transformer; the liquid crystal The screen, touch screen, and memory are connected to the main controller of the electroacupuncture instrument through data lines and control lines, the keyboard is connected to the IO port of the main controller of the electroacupuncture instrument, the main controller of the electroacupuncture instrument is connected to the digital-to-analog converter, and the output The terminal is connected with the low-pass filter; the signal generated by the digital-to-analog converter is output through the low-pass filter, the analog amplifier and the step-up transformer in sequence, and it is characterized in that the specific arbitrary waveform generation method is as follows: 1) Drawing, recording, and displaying The user draws the desired waveform on the touch screen, and the main controller of the electroacupuncture instrument continuously reads the coordinate values of each point of the waveform on the touch screen; the main controller of the electroacupuncture instrument sets a threshold, removes points exceeding the threshold, that is, accidental interference points, and then The coordinate value data of each point of the waveform is stored in the memory; the display function of the main controller of the electroacupuncture instrument reads the coordinate value data of each point of the waveform from the memory, and draws the waveform required by the user on the liquid crystal display; 2) Waveform data processing Assume that the height of the waveform at any x-coordinate position is y, and y is the amplitude of the waveform here; the ordinates of the curve are stored in the array wave[] in the order of y1, y2, y3... from front to back, Perform threshold filtering and mean denoising on the data in wave[]; 3) Read waveform parameters The waveform generated by the electroacupuncture instrument is enveloped by the waveform described in wave[]. The main controller of the electroacupuncture instrument reads the parameters input by the user through the keyboard or the soft keyboard on the touch screen, and saves them in the memory of the main controller of the electroacupuncture instrument. middle; 4) Digital modulation and output Read the values in the pulse function pulse[] in the main controller program of the electroacupuncture instrument sequentially, multiply them with the values in the envelope waveform wave[], and after a delay of t, send them to the digital-to-analog converter for output. The expression is: output=pulse[i]*wave[j]; i and j are program loop variables; the delay time t is obtained by the frequency parameter obtained in step 3); The periodic waveform output is obtained; 5) Filtering and output adjustment The waveform obtained by the digital-to-analog converter is amplified by the analog amplifier circuit after the high-frequency noise is removed by the low-pass filter, and then boosted by the step-up transformer to obtain the voltage of the output waveform.

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