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Piezoelectric detector upper casing 1.5-meter cable
A piezoelectric detector converts mechanical vibrations (seismic waves) into electrical signals through the inverse piezoelectric effect of a piezoelectric crystal (such as quartz or piezoelectric ceramic).
Seismic waves are generated by dropping a heavy weight (typically 50-500kg) onto the ground to conduct shallow geological surveys (such as for roads and building foundations).
Geophones, based on the piezoelectric effect or electromagnetic induction, convert ground vibrations (such as seismic waves, mechanical impacts) into electrical signals, which are then transmitted via cable to the acquisition instrument.