What is ultrasound? Do you know?
The word ultrasound believes that everyone is no longer strange. With the development of society and the development of technology, ultrasound has gradually entered the circle of people's lives.
1. What is ultrasonic?
Scientists refer to the number of vibrations per second as the frequency of the sound, and its unit is Hertz (Hz). The frequency of sound waves that we can hear in human ears is 20Hz-20000Hz. Therefore, we call sound waves with frequencies above 20,000 Hz "ultrasonics". The ultrasonic frequency commonly used for medical diagnosis is 1 megahertz to 30 megahertz.
Ultrasound is a silent voice. Scientists use the energy generated by ultrasonic waves to make a lot of ultrasonic mechanical equipment. These ultrasonic mechanical equipments are widely used in various industries, adding unlimited value to social development, and indirectly benefiting humans. !
2. What mechanical equipment did humans use to make ultrasonic waves?
Ultrasonic plastic welding machine, ultrasonic cleaning machine, ultrasonic generator, ultrasonic humidifier, ultrasonic sensor, ultrasonic spot welding machine, ultrasonic mold, ultrasonic welding machine, hot plate welding machine, filter welding machine, vibration friction equipment, ultrasonic automobile interior Plate welding machine and various non-standard machines.
3. What are the products produced by humans from animal function? 1. The very strange small gas analyzer 2 is produced by unpleasant flight. The jellyfish ear storm forecaster 5 is designed from fireflies to artificial cold light 3, electric fish and volt batteries 4 and jellyfish. An electronic frog eye 6 was developed based on the visual principle of the frog eye. According to the principle of the bat ultrasonic locator, it also imitates the "Pathfinder" of the blind. 7, the hook of the modern crane is derived from the claws of many animals. The roof ripples imitate the scales of the animal 10, the fins 11 simulate the paddle, and the saw is the arm. 12. This scent-sensitive lobster provides an idea for people to make odor detectors. The gecko's toes provide an encouraging prospect for producing a reusable tape. The protein produces a very strong colloid. So the gel can be applied to everything, such as surgical suturing a complementary boat, a submarine and a fish sink, sonar dolphin 17, radar bat.
4. The high frequency oscillation signal of the ultrasonic generator is converted into a high frequency mechanical oscillation, and the high frequency oscillation signal of the ultrasonic generator is transmitted to the cleaning solvent medium. Ultrasonic waves are closely radiated to each other in the cleaning solution. The liquid flow produces tens of thousands of tiny bubbles of 50-500 μm in diameter, and the tiny bubbles present in the liquid vibrate under the action of the sound field. These bubbles form and grow in the negative pressure zone, where the ultrasonic waves propagate longitudinally. In the positive pressure zone, when the sound pressure reaches a certain value, the bubble rapidly increases and then suddenly closes. When the bubble is closed, a shock wave is generated, and thousands of atmospheres are generated around it, destroying the insoluble dirt, and dispersing it in the cleaning solution. The oil is emulsified when the group particles are wrapped in the oil and adhere to the surface of the cleaned portion. Separation of solid particles to achieve the purpose of cleaning parts.
5. What are the characteristics of ultrasound? When the ultrasonic wave propagates, the direction is strong and the energy is easily concentrated. 2. Ultrasound can travel in a variety of media and travel far enough. 3. The interaction between ultrasound and acoustic media is moderate, so it is easy to carry information about the diagnostic state of the sound source, or to produce effects and treatments on the sound medium. 4. Ultrasonic energy can be effectively transmitted in media such as gases, liquids, and solid melts. 5. Ultrasonic energy can deliver very strong energy. 6. Ultrasound produces reflections, disturbances, superpositions and resonances.
6. The scope of application of ultrasound
Ultrasonic products are widely used in batteries, beauty, military, hardware, electroplating, medicine, watches, circuit boards, optics, medical, agent containers, jewelry, electronics, toys and other industries.
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