What Are The Applications Of Ultrasound?

Ultrasonic effect has been widely used in practice, mainly in the following aspects:

Gamma test

Shorter than ordinary sound waves, wave lengths of ultrasound make a good direction, but also through the opaque material, this feature has been widely used in ultrasonic testing, thickness, distance measurement, remote control and the technology of ultrasonic imaging. Ultrasonic imaging is a technology that USES ultrasound to present the inner image of opaque objects. From the transducer of ultrasonic acoustic lens focused on opaque sample, the ultrasonic carried from the sample passes was as part of the information (such as the ability of reflection, absorption and scattering of sound waves), the acoustic lens converge on piezoelectric receiver, the electrical signal input amplifier, using scanning system can turn opaque sample image displayed on the screen. The device is called an ultrasonic microscope. Ultrasonic imaging technology has been widely applied in medical examination, in the manufacturing of microelectronic device used for inspection on large scale integrated circuit, is used for displaying alloys of different compositions in the materials science area and grain boundary, etc. Acoustical holography is an ultrasonic interference principle of record and reproduce the three-dimensional image of opaque acoustic imaging technology, its principle and optical holography are basically the same, just record means different (see holography). With the same ultrasonic signal source motivation two transducer be placed in a liquid, they launched two coherent beam of ultrasound: a beam through the object studied after become a wave, a bunch of reference wave. Object wave and reference wave coherent superposition acoustical hologram formed on the surface of the liquid, with laser beam acoustical hologram, using a laser reflection on acoustical hologram diffraction effect and get things back like, usually with a camera and television sets for real-time observation.

Aluminium ultrasonic treatment

Using ultrasonic mechanical action, cavitation effect and heat effect and chemical effect, ultrasonic welding, drilling, the solid can be shattered, emulsification, degassing, dust removal, to scale, cleaning, sterilization, and promote chemistry and biology, etc., in GongKuangYe, agriculture, medical departments received a wide range of applications.

Calculus fundamental research

When ultrasonic wave ACTS on the medium, producing acoustic relaxation process in the medium, acoustic relaxation process with electrical degrees between respectively for the molecular energy transport process, and to absorb sound waves in the macro (see sound waves). The characteristics and structures of substances can be explored through the absorption law of substances to ultrasound, which constitutes the branch of molecular acoustics. The wave of ordinary sound waves is longer than the distance between atoms in the solid, under which the solid can be regarded as a continuous medium. However, for ultrasonic waves with frequencies above 1012 hz, the wavelength can be compared with the spacing between atoms in the solid. At this time, the solid must be regarded as a point matrix structure with spatial periodicity. The energy of lattice vibration is quantized and is called phonon (see solid physics). The effects of ultrasound on solids can be summarized as the interactions between ultrasound and thermophonons, electrons, photons and various quasiparticles. The study on the generation, detection and propagation of special ultrasound in solid state, as well as the study on the sound phenomenon in quantum liquid -- liquid helium, constitute a new field of modern acoustics.

Sound waves belong to one of the categories of sound and belong to mechanical waves. Sound waves refer to a kind of longitudinal wave that can be felt by the human ear. The frequency range is 16hz-20khz. When the frequency of sound wave is lower than 20Hz, it is called subsonic wave, and when the frequency is higher than 20KHz, it is called ultrasonic wave.

Ultrasonic has the following characteristics:

1) ultrasonic waves can be effectively transmitted in gases, liquids, solids, solid melts and other media.

2) ultrasonic waves can transmit strong energy.

3) ultrasonic wave will generate reflection, interference, superposition and resonance.

4) when ultrasonic wave propagates in liquid medium, it can generate strong impact and cavitation on the interface.

Ultrasound is a member of the sonic family. Sound waves are the transmission of mechanical vibration (or energy). Vibration refers to the return motion of a material's particle near its equilibrium position. For example, when a drum is hit, it vibrates up and down. This vibrational state is transmitted in all directions through the air medium.

Ultrasonic wave refers to the vibration frequency of more than 20KHz, people in the natural environment can not hear and feel the sound waves.

The concept of ultrasound therapy:

Ultrasound therapy is an important part of ultrasound medicine. In ultrasonic treatment, ultrasonic energy is applied to the diseased part of the human body to cure diseases and promote the recovery of the body.

In the world, ultrasound is widely used in diagnostics, therapeutics, engineering, biology and other fields. The ultrasonic therapeutic apparatus used in the home of severus belongs to the application of ultrasonic therapy.

(1) application in engineering: underwater positioning and communication, underground resource exploration, etc.

(2) applications in biology: cutting macromolecules, bioengineering and seed treatment.

(3) diagnostic applications: type A, type B, type M, type D, double work, color doppler, etc.

Application of therapeutics: physiotherapy, cancer treatment, surgery, extracorporeal lithotripsy, dentistry, etc.