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PWM signal generation circuit and method for biological sample ultrasonic treatment system

A PWM signal and ultrasonic processing technology, applied in the preparation of test samples, pulse shaping, etc., can solve the problems of frequency deviation, inflexible adjustment, consistency difference, etc., to achieve accurate frequency, simplified hardware structure, and good consistency Effect

Pending Publication Date: 2021-06-11
LONGLIGHT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The frequency of the conventional ultrasonic system cannot fully meet the requirements of biological sample processing, and the frequency range needs to be increased to 100kHz ~ 1MHZ
[0004] At the same time, the signal source generally uses an RC oscillator, and the generated clock frequency is a fixed value, which cannot be adjusted flexibly; and electronic components such as resistors and capacitors usually have 10% or more deviation in parameters, so there will be problems in consistency. difference, the resulting frequency will have the same deviation

Method used

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  • PWM signal generation circuit and method for biological sample ultrasonic treatment system
  • PWM signal generation circuit and method for biological sample ultrasonic treatment system
  • PWM signal generation circuit and method for biological sample ultrasonic treatment system

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Embodiment 1

[0049] like Figure 1 to Figure 6 As shown, this embodiment discloses a PWM signal generation circuit for a biological sample ultrasonic processing system, which is used to generate a PWM signal, including:

[0050] Microcontroller to generate and output the required PWM signal;

[0051] A power module for powering the microcontroller;

[0052] Reset the circuit module to ensure that the microcontroller can work normally after the microcontroller is initialized;

[0053] The oscillation circuit module is used to generate the basic signal source of the microcontroller's system clock.

[0054] The above-mentioned disclosed circuit takes the microcontroller as the core and the clock of the oscillation circuit as the basis. By configuring and controlling its peripheral circuits and internal circuit modules, a system clock with high stability and accuracy is obtained to drive the timer. The output frequency meets the requirements of The signal required by the biological sample p...

Embodiment 2

[0067] like Figure 1 to Figure 6 As shown, this embodiment discloses a PWM signal generation method for a biological sample ultrasonic processing system. The signal generation circuit disclosed in Embodiment 1 is applied to generate and output a PWM signal through a microcontroller, including the following steps:

[0068] The oscillating circuit module works to generate a sine wave signal and input it to the microcontroller;

[0069] According to the frequency of the sine wave generated by the oscillating circuit module, configure the microcontroller and obtain the system clock frequency; in this step, the microcontroller is configured with a timer module, and the configuration of the microcontroller is made for the timer module of.

[0070] According to the system clock frequency, configure the microcontroller and generate the same PWM signal as the required ultrasonic frequency, and output the PWM signal from the pin of the microcontroller chip in the form of high and low ...

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Abstract

The invention relates to the technical field of an ultrasonic power supply and application thereof, in particular to a PWM signal generation circuit and method for a biological sample ultrasonic processing system, the circuit comprises a microcontroller, and a power supply module, a reset circuit module and an oscillating circuit module which are connected with the microcontroller, when the circuit works, the microcontroller generates and outputs a PWM signal. The method comprises the following steps: configuring a frequency doubling and frequency dividing circuit module in a microcontroller according to the frequency of a sine wave generated by an oscillating circuit to obtain the system clock frequency of the microcontroller; and configuring the clock frequency and timer parameters of a timer module in the microcontroller according to the system clock frequency, and outputting PWM signals from pins of a microcontroller chip in a high-low level mode. According to the invention, hardware is simple, stability is high, consistency is good, the fault rate can be obviously reduced, output performances such as frequency, duty ratio, opening and closing of PWM signals can be flexibly controlled through the microcontroller, and various flexible applications can be realized.

Description

technical field [0001] The invention relates to the technical field of ultrasonic power supply and its application, in particular to a PWM signal generation circuit and method for a biological sample ultrasonic processing system. Background technique [0002] At present, the commonly used ultrasonic frequency ranges from 20kHz to 50kHz, and the processing of biological samples requires the use of high-frequency ultrasonic waves of hundreds of kHz to change the various properties of the sample and meet the requirements of further analysis or testing. At this time, an ultrasonic wave is required. The power source drives the ultrasonic transducer to generate the high-frequency ultrasonic waves. Therefore, in the ultrasonic power supply, it is necessary to use an ultrasonic signal source capable of generating a signal frequency of 100 kHz to 1 MHz to drive the power amplifier to output an electrical signal of a corresponding frequency. [0003] In the prior art, conventional ul...

Claims

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Application Information

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IPC IPC(8): H03K5/05H03K5/07G01N1/28
CPCH03K5/07H03K5/05G01N1/28Y02B70/10
Inventor 彭民伟康炎
Owner LONGLIGHT TECH CO LTD
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