Self-adapting ultrasonic dental descaler

Abstract

The invention provides a self-adapting ultrasonic dental descaler which comprises an MPU (micro processing unit), an oscillating unit, a frequency control unit, an intensity control unit, a power amplification unit, a current sampling feedback unit, a mechanical vibration unit and a power supply unit, wherein the oscillating unit generates push-pull pulse output with a controllable duty ratio under the control of the MPU; the MPU transmits data to the frequency control unit to control oscillating frequency of the oscillating unit, so that a duty ratio and frequency of an oscillating signal generated by the oscillating unit are controlled by the MPU; and after the oscillating signal is amplified by the power amplification unit, the mechanical vibration unit is driven to convert an ultrasonic oscillating electrical signal to an ultrasonic mechanical vibration signal. The descaler can automatically scan and search an optimal resonance point; resonance frequency and oscillating intensity are locked digitally; the drift of the resonance point is very small; the working efficiency is high; the stability and reliability are improved; and dirt such as dental scale and calculus can be removed well.

Description

technical field [0001] The invention relates to the technical field of medical plastic and cosmetic equipment, in particular to an adaptive ultrasonic tooth scaler. Background technique [0002] Ultrasonic tooth scaler is a tooth cleaning machine used in the process of ultrasonic tooth cleaning. It drives the tooth cleaning tip through ultrasonic waves, and extends the vibrating tooth scale tip into the oral cavity to loosen plaque, tartar, and fine tartar and teeth. The adhesive on the tooth surface breaks down the dirt on the tooth surface, and at the same time, it is continuously rinsed with water to remove the calculus on the tooth surface and complete the tooth cleaning. [0003] The oscillating signal of the existing ultrasonic tooth scaler is usually directly generated by the single-chip microcomputer controller. Although this method is simple and convenient, there are two defects: first, the push-pull oscillating signal cannot be generated, so the power amplifier cir...

AI Technical Summary

Problems solved by technology

[0003] The oscillating signal of the existing ultrasonic tooth scaler is usually directly generated by the single-chip microcomputer controller. Although this method is simple and convenient, there are two defects: first, the push-pull oscillating signal cannot be generated, so the power amplifier circuit can only work at In the positive half cycle, the efficiency is low, and the heat is serious, which is not conducive to the stable operation of the circuit; second, the resonance point of the piezoelectric ceramic sheet is at (30±5)KHz, and the resonance frequency bandwidth is ≤80Hz, while the PWM output of the microcontroller controller is at 25 At a frequency of ~35KHz, the step frequency is ≥100Hz, so the PWM output of the microcontroller controller may not find the best resonance point of the piezoelectric ceramic chip, which further reduces the work efficiency

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