An ultrasound transducer is used in a number of scenarios, such as flaw detection, gauging thickness, material research, and medical diagnostics, the biomedical world, nondestructive application evaluations, as well as for penetration of think materials. it works when there is the back and forth transformation of sound energy into electrical energy. It can thus generate and pick the ultrasounds, which is how it manages to tell the distance. It comes with three main parts, and other smaller parts. These are the piezoelectric crystal, wear plate, and backing; acoustic matching layer; and the acoustic lens.
The piezoelectric crystal is the center of the transducer. It shall go through a series of rarefactions and compressions for it to convert electrical energy into ultrasonic energy, and vice versa. There are electrodes placed on each side of the crystal. As a vibration hits it from outside, it shall use it to make a voltage. The crystal is in strip sections that have electrodes affixed to them. A strip will have the size of a strand of hair. These are what the unit will use to measure the distance.
There is then a wear plate that keeps the crystal safe from harm. IT goes further and prevents corrosion, and wear and tear. It may also act as an acoustic transformer between water, wedge, crystal, or delay line.
The backing material is usually made of a substance dense enough to serve it attenuating purpose effectively. It shall therefore absorb the energy radiating from the back of the crystal, which helps to keep the vibration in check. This unit shall minimize the excessive vibration, which allows the element to generate ultrasonic waves that have a shorter pulse length, which produces a much improved image resolution.
You shall also find the acoustic matching layer, which sits between the object and the piezoelectric element. Its plays the role of making sure the element does not get reflected off a target, seeing as the object and the piezoelectric element do not share the same acoustic impendence. The acoustic matching layer shall therefore see to it that the generated waves go into the object more efficiently. This layer shall be made from different resin materials that enable the device to have the right acoustic impendence figures.
The acoustic lens shall be the gray section that looks like a rubber attached to the tip of the probe. The acoustic waves emanating from the probe go out fast and spread out as well. The work of the lens is to keep the ultrasonic waves from spreading and focuses them in a particular direction to give forth a better image resolution.
You shall many brands, designs and styles for these devices. It is important that you get this device from a reputable and reliable manufacturer.