What is a piezoelectric pressure gauge?
If pressure is applied to asymmetric crystals such as quartz or tourmaline , an electric current will appear in it, and on the contrary, when an electric voltage is applied, these types of crystals will show mechanical expansion or contraction. This phenomenon is called piezoelectric effect. It can be used in piezoelectric pressure transducers.
In this transducer, weak pressure was produced in proportion to the change in pressure. This weak and transient current is amplified by the amplifier circuit and is displayed on the screen or sent to the control system.
The main difference between these crystals and other instruments such as strain gauges is the rapid loss of the electrical signal produced by the crystal. For this reason, this method is mostly used in the measurements of transient and fast materials such as explosions and impacts. Solidity, the ability to work at high pressures and small sizes are the characteristics of piezoelectric sensors. The high sensitivity of these devices to temperature changes is one of their weak points.
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