Ultrasonic beauty instrument program development

Biomedical ultrasound refers to the phenomenon, effect, function, mechanism and application of ultrasound in isolated or living biological tissues. It is based on the interaction between ultrasound and human tissue, and uses electronics and computer technology to realize the diagnosis and treatment of human diseases. Ultrasound therapy is the use of ultrasonic waves to produce thermal, mechanical, cavitation, biochemical and other effects in the human body to achieve the purpose of treating diseases. Ultrasonic cosmetology is a kind of ultrasonic treatment technology, which uses the biological effect of ultrasound on the human body for beauty. Because of its good therapeutic, recovery and health care effects on various skin diseases and beauty problems, it is widely used in the beauty industry. Due to its wide range of treatment, quick effect, high cure rate, easy operation and percutaneous penetration of various substances, the ultrasonic beauty instrument has become one of the most practical and popular equipment among many beauty equipment. Ultrasonic beauty instruments that appear on the market today have complex structures, high circuit failure rates, and unreliable work, so they are subject to great application restrictions. The ultrasonic beauty instrument provided in this article is designed with a microprocessor chip PIC with low power consumption, high reliability, and built-in hardware watchdog. The circuit is simplified, the work is reliable and stable, and the ultrasonic spray is fine and uniform, and the effect is remarkable.

1. The mechanism of ultrasonic medical cosmetology

Ultrasound is used for cosmetology, mainly based on two principles: one is to utilize the cavitation effect of ultrasonic to liquid; the other is to utilize the biological effect of ultrasonic probe directly on human skin. The principle of cavitation is that there are generally a large number of submicroscopic bubbles inside the liquid. Under the action of ultrasonic mechanical vibration, these bubbles will gradually expand due to the gas dissolved in the liquid around the bubbles being precipitated into the bubbles. When the bubble grows to the same length as the ultrasonic wave, the bubble acts as a resonant cavity, and its resonance amplitude can be several orders of magnitude larger than that of the incident ultrasonic wave. Biological effects can be induced through the action of "cavitation bubbles". The ultrasonic probe directly acts on the human skin with ultra-high frequency mechanical vibrations to produce biological effects, which can be summed up mainly because of its three major effects on the body, namely mechanical action, thermal action and physical and chemical action. The ultrasonic effect has mechanical effects such as enhancing tissue penetration, improving cell metabolism, promoting blood circulation, and softening hard tissues. It is more effective than mechanical massage in treating skin problems such as blemishes and scleroderma. Under high-frequency mechanical vibration, the blood circulation of the body is vigorous, and the excitability of nerves and muscles is reduced, so it can produce good analgesic and antispasmodic effects, accelerate cell metabolism, and promote changes in tissue pH. Increasing the permeability of cell membrane is the main performance of ultrasonic physicochemical effect. In addition, ultrasound promotes the percutaneous penetration of substances, which is one of the widely used cosmetic techniques. When various problems occur on the skin, certain nutrition and drugs are often needed to adjust, but due to the relationship between the composition of nutrients and the structure of the skin , its absorption will be affected to varying degrees. If we make full use of the diffusion and tissue penetration of ultrasound, so that the corresponding nutrients or drugs can completely penetrate into the body through the skin or mucous membranes, the therapeutic effect will be greatly increased, because ultrasound has a good effect on plant essence or small molecular compounds. absorption-stimulating effect.

In short, the mechanical action, warming action, and biochemical action of ultrasound itself can make local tissue cells receive fine massage, cell function is stimulated, and blood lymphatic circulation is improved. In addition, the vibration waves generated by ultrasonic waves can also massage and clean the skin, relax tendons and activate blood circulation, soften tissues and strengthen the metabolism of tissues.

Practice has shown that ultrasonic cosmetology can help skin lifting, wrinkle removal, weight loss, double chin reduction, pit removal, scar removal, eye bag removal, fish eye line removal, improvement of skin quality, softening of nodules, elimination of acne scars, elimination of skin pigmentation, anti-wrinkle Removing wrinkles, eliminating dark circles, etc. have very significant medical and cosmetic effects.

2. Functional design and development of ultrasonic beauty equipment

This instrument mainly realizes two basic functions: one is ultrasonic spray, which uses the cavitation effect of ultrasonic waves on liquid, and this cavitation mist directly acts on the facial skin of the human body. The beauty effect is achieved in the feeling; the second is to use the ultrasonic waves generated by the ultrasonic massage probe to directly act on the skin of the human body, and use the mechanical, warm, and physical and chemical effects of the ultrasonic waves to comprehensively act on the skin to produce a strong cosmetic effect. The above two functions can be converted arbitrarily to meet different needs. Other functions include time setting function (manual timing and automatic timing are combined to set different working hours), spray volume and ultrasonic energy multi-level adjustment function, in addition, it also has functions such as automatic alarm and dynamic information display.

The ultrasonic beauty instrument is composed of a single-chip microprocessor as the core, and the structural block diagram is shown in the figure. shown. The single-chip microcomputer PIC16C58A produced by Microchip Company is reliable in operation, low in power consumption, and has strong load capacity. Because it adopts the simplified instruction (RISC), the internal bus of Harvard structure and the design method of two-stage pipeline, although the program memory is 2; K bytes , but compared with similar microcontrollers, its program memory can be saved by half, and the instruction speed can be increased by about 4 times. Its built-in watchdog can prevent the program from crashing and reset it effectively when the program runs away, which greatly improves the anti-interference ability of the system. All these advantages make it one of the mainstream microcontrollers. This series of single-chip microcomputers are available in various forms. Choosing this chip can make full use of resources, minimize the number of peripheral chips, and realize the optimal design of the instrument.

All the operation commands of the instrument are input through the keyboard, which include the start command of the ultrasonic circuit, the timing of the ultrasonic wave, the conversion command of the ultrasonic spray and the massage probe, and the control command of the size of the ultrasonic energy. When using the instrument, the user can select and adjust the ultrasonic duration and ultrasonic intensity parameters according to needs. The working status and information of the instrument are displayed with digital tubes, indicating the timing time, remaining time and human-computer interaction information. The ultrasonic oscillation generation circuit is in the microcontroller PIC. It operates under the control of 6C58A, and the ultrasonic transmission frequency is . 1~1.1MHz, power 30~40W, the adjustment of power is realized by software.

The application software adopts a modular structure design, which is convenient for modification and debugging. The functions of each module are shown in Figure 2. The main control program coordinates each module to run according to default values or keyboard commands. The keyboard command program is mainly composed of a keyboard scanning program and a debounce program, which sends the scanned key value to the CPU for processing; the display program is responsible for controlling the display buffer, updating the content of the display buffer, and sending the displayed information to each LED ; The ultrasonic control program implements the start and stop of the ultrasonic wave and the adjustment of the energy size; the output control program implements functions such as probe conversion and timing alarm.

Summarize

Ultrasonic cosmetology is popular in the cosmetology industry for its unique cosmetology principles and efficient cosmetology effects, and it is becoming more and more family-oriented. The ultrasonic cosmetology instrument introduced in this article is simple in design, highly intelligent, easy to operate, and reliable in circuit operation, so it is very suitable for Home use for beauty.

The above is the mechanism of ultrasonic medical cosmetology and the example of instrument design and development introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. If you have a need for the development of a portable beauty instrument solution, you can rest assured to entrust it to us. We represent a variety of single-chip microcomputers, voice chips, dual-mode Bluetooth ICs, and wifi chips. Brands include Songhan MCU, Yingguang MCU, Jerry Bluetooth, Ankai Bluetooth, Allwinner, and Realtek. Our technical services include: PCB design, MCU development, Bluetooth solution, software and hardware custom development, APP development, small program development, WeChat official account development, etc. It can also undertake the design of intelligent electronic products, the development of living appliances, the research and development of beauty equipment, the application of Internet of things platform, the smart home control system, the development of TWS earphones, Bluetooth earphone speakers, the development of children's educational toys, the design of electronic education products, etc.