What is a piezoelectric barometer?
If pressure is applied to asymmetric crystals such as quartz or tourmaline , an electric current is created in it, and conversely, when electrical voltage is applied, these types of crystals show mechanical expansion or contraction. This phenomenon is called the piezoelectric effect. It is used in piezoelectric pressure transducers.
In this transducer, a weak pressure was generated in proportion to the change in pressure. This weak and transient current is amplified by the amplifier circuit and displayed or sent to the control system.
The main difference between these crystals and other instruments such as strain gauges is the rapid disappearance of the electrical signal generated by the crystal. For this reason, this method is mostly used in measurements of transient and fast materials such as explosions and shocks. Robustness, ability to operate at high pressures and small sizes are the features of piezoelectric sensors. The high sensitivity of these devices to temperature changes is one of their weaknesses.
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