Working principle of piezoelectric ceramics in different application fields

Piezoelectric hydrophone principle/working principle: Piezoelectric ceramicsare used as the energy-transforming material. The piezoceramic tubes are arranged in two parallels to form a bamboo-shaped structure to improve the sensitivity and anti-interference ability of the hydrophone. The piezoelectric ceramic tubes are bonded and positioned with insulating gaskets. The piezoceramic tube deforms under the action of sound pressure, and generates an electrical signal output by virtue of its piezoelectric effect.

 

The piezoceramic sensing element and its internal support structure are permanently bonded in lead-free, acoustically transparent, rubber. The piezoelectric hydrophone support structure is made of a metal alloy that is extremely resistant to corrosion in almost all harsh environments and is very resistant to fouling when submerged in seawater. The internal supports are mechanically and electrically isolated from the metal casing, coupled only by elastomer. This provides vibration isolation of the sensing element.

 

Application range of piezoelectric ceramics:

1. Electrical-mechanical-electrical conversion

Circuit components: oscillators, delay lines, filters

Ultrasound in the air: distance meter, snow meter, safety alarm, car reversing corner sensor, liquid level meter, remote control switch

Ultrasonic waves underwater: underwater microphones, fish detectors, ship docking speedometers, detectors, sonar

Medical ultrasound: tomographic diagnostic equipment, childbirth monitoring equipment, fetal heart rate monitor, endoscope

General ultrasonic: flaw detector, thickness gauge, microscope, elastic force tester, etc.

Piezoelectric conversion: high voltage power supply, ionizer, etc.

Vibration gyroscope: Camera anti-shake, car navigation system, etc.

2. Convert electrical energy to mechanical energy

QL Ultrasonic: cleaning machine, humidifier, sprayer, decontamination device, cutting grinder, stone crusher,ultrasonic medical massager, etc.

Executive components: camera focus, micropump, printer, relay, position controller, vibrating screen, motor, fan, etc.

3. Convert mechanical energy into electrical energy

Sensors: AE sensor, water leakage sensor, shock sensor, vibration switch, pressure sensor, vibration sensor, etc.

High voltage generation: cigarette lighters, gas stoves, static eliminators, piezoelectric generators

Hydrophones can be used as individually calibrated hydroacoustic sensors. These hydroacoustic transducers offer a flat frequency response and are omnidirectional over a wide frequency range. All hydrophones are constructed with shielded elements; fully waterproof, corrosion resistant, and able to withstand high salinity. These hydroacoustic sensors offer a new level of depth, range and precision when measuring sound in the laboratory and in marine research.