A beauty instrument ultrasonic overview
Human ears can hear the frequency of sound waves for 20 ~ 20,000Hz. when the vibration frequency of sound waves is greater than 20,000Hz or less than 20Hz, we will not be able to hear. Therefore, we call sound waves with a frequency higher than 20,000Hz "ultrasound".
The lower the frequency of ultrasound, the stronger the penetrating power. Generally used in the beauty industry ultrasonic frequency of 1-3MHz.
Ultrasonic waves have good directionality, strong penetration ability, easy to obtain a more concentrated sound energy, the propagation distance and other characteristics. Therefore it is used in more and more industries.
Beauty equipment ultrasonic technology since the 80's since the introduction of beauty. With its wide therapeutic range, fast results, high cure rate, easy to operate and popularize and promote, has become the most practical and popular equipment in many beauty instrument. With the progress of science and technology, a new generation of professional ultrasonic beauty equipment came out, with its excellent quality, powerful functions, luxury appearance quickly swept the beauty industry.
Ultrasonic waves applied to the beauty industry mainly have the following roles
1, mechanical effects: 1 million times per second of mechanical vibration, so that the role of each part of the vibration, play a unique role in the cellular massage to improve cell metabolism, enhance the vitality of the cells to promote blood circulation, improve the nutrition of the skin tissues, so that the skin is red. Increase elasticity.
2, warming effect: the warming effect of ultrasound by causing changes in vascular function and metabolic process, can make blood circulation, so that the cellular excitability is reduced, resulting in analgesic effect. Make the spasm of the skin relaxation, with the role of decongestive.
3, chemical effects: ultrasound has to strengthen the catalytic, accelerate the role of metabolism. Can make the ph value to the alkaline side of the change. Facilitate the penetration of drugs, improve the sterilization ability of drugs.
Two, beauty instrument ultrasonic schematic analysis
1, beauty instrument ultrasonic schematic 2, beauty instrument ultrasonic head components
In fact, the ultrasonic head is mainly composed of piezoelectric ceramic sheet and metal head. Which piezoelectric ceramic piece is an oscillator device, working at a frequency of 1MHz high-speed oscillation, the energy generated by the metal head by the metal head to transfer to the surface of the metal head.
3, circuit analysis
In this circuit, C2 C3 C4 Q2 L3 and ultrasonic head **** with a capacitive self-excited oscillator circuit, special attention: we are analyzing the circuit, the ultrasonic head as a capacitor to analyze. Because the ultrasonic head itself is the main device composed of piezoelectric ceramic sheet, and piezoelectric ceramic sheet is actually a large capacitor, so there is no ultrasonic head of this circuit will not be vibration.
Q2 is the oscillator tube, is the core of the entire circuit, so we have to use according to the power supply voltage V1 and the working current to select the parameters of the general ultrasonic circuits on the beauty equipment are less than 48V voltage.
L2 is a choke, its main role is to work to ensure that the operating current will not be too large and burn the oscillator tube.
Other devices *** with the composition of an oscillator tube base adjustment circuit, this circuit is regulated by RW1 output size, you can also use a microcontroller to do the output size.
This circuit is simple and durable, mainly to Q2 to install enough heat sink on it. Ultrasonic beauty equipment on the market are basically using this circuit.
Ultrasonic beauty instrument: the degree of probe heat does not represent the amount of acoustic wave output power, too hot easy to burn the skin; concentration is too small aqueous drugs, should not be directly infiltrated, otherwise it is easy to cause skin dryness; the use of the probe can not be used from the eyeballs through the upper eyelid can not be massaged; pregnant women and patients with serious heart disease can not be used.
The operation of beauty equipment prohibited people: pregnant women; daily work can not be avoided strong (sun) light exposure to the crowd; light allergy and drug allergy and allergic to bright light source of the crowd; skin sensitivity is very susceptible to infection allergies; epilepsy patients and scars and the body of the crowd; the guest's upper eyelids and open wounds with the parts; diabetic patients; the use of efficacy-type skincare should be discontinued 1-3 months after the operation, the operation of the skin care system. If you are using efficacious skin care products, you should stop using them for 1-3 months before operation, and stop using essential oils on the operation site for 1-2 days before operation, and blackheads and acne need to be cleared by needles for three days before treatment.