You shall find the use of an ultrasonic transducer in various settings, 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 relies on the principle of transformation of sound energy into electrical energy and the reversal of this process. It shall thus pick and generate the ultrasounds, which is how it tells distances. This device has three main sections. These shall be the piezoelectric crystal, wear plate, and backing; acoustic matching layer; and the acoustic lens.
The piezoelectric crystal forms the heart of the gadget. It undergoes a series of rarefactions and compressions to manage getting electrical energy into ultrasonic energy, and then to reverse it. There shall be electrodes on both sides of the crystal. When a vibration originates from the outside of the crystal, it shall make a voltage out of it. this crystal is a series of strips that have electrodes joined to each. A strip will have the size of a strand of hair. These are what the unit will use to measure the distance.
the crystal is them protected from the action of the environment by a wear plate. IT goes further and prevents corrosion, and wear and tear. IT also has the added function of being 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 is what will keep the excessive vibrations to a minimum, thus giving the element space to generate ultrasonic waves that have the right pulse length to kame images that have a high resolution.
There is also the acoustic matching layer, which lies between the object and piezoelectric element. Its purpose is to ensure the element does not get reflected off a target, since there is a big difference in acoustic impendence between the object and piezoelectric element. 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. When ultrasonic waves are transmitted from the probe, they shall spread and move rapidly. This lens is there to focus the spreading waves, thus producing a proper image resolution.
You shall many brands, designs and styles for these devices. You need to be careful where you get your device from.