Analysis Of Ultrasonic Principle Diagram Of Beauty Equipment
1. Ultrasonic schematic diagram of beauty equipment
2. Ultrasonic head assembly of beauty equipment
In fact, the ultrasonic head is mainly composed of a piezoelectric ceramic sheet and a metal head. Among them, the piezoelectric ceramic sheet is an oscillator device, which oscillates at a high speed at a frequency of 1MHz during operation, and the energy generated by it is transferred to the surface of the metal head by the metal head.
3. Circuit analysis
In this circuit, C2 C3 C4 Q2 L3 and the ultrasonic head together form a capacitive self-excited oscillation circuit. Special attention: when we analyze this circuit, the ultrasonic head should be analyzed as a capacitive component. Because the main components of the ultrasonic head itself are composed of piezoelectric ceramic sheets, and the piezoelectric ceramic sheet is actually a large capacitor, the circuit will not vibrate without the ultrasonic head.
Q2 is the oscillating tube, which is the core of the whole circuit, so we should select the parameters according to the power supply voltage V1 and working current when using it. Generally, the ultrasonic circuit on the beauty equipment uses a voltage lower than 48V.
L2 is a choke coil, its main function is to ensure that the operating current will not be too large and burn the oscillator tube during work.
Other devices together form a base adjustment circuit of an oscillator, this circuit is adjusted by RW1 output size, you can also use a single-chip microcomputer as the output size.
This circuit is simple and durable. It is mainly to install enough radiator for Q2. The ultrasonic beauty equipment on the market basically uses this circuit.
Ultrasonic Beauty Apparatus: The degree of heat of the probe does not represent the output power of the sound wave. Too hot can burn the skin; if the concentration is too small, it is not suitable to penetrate directly, otherwise it will cause skin dryness. When using, the probe cannot pass through the eyeball. Eyelids cannot be massaged; pregnant women and patients with severe heart disease cannot use it.
