ultrasonic detector การใช้

• The ultrasonic detector operates by the transmitter emitting an ultrasonic signal into the area to be protected.
• Since piezoelectric materials generate a voltage when force is applied to them, they can also work as ultrasonic detectors.
• This powerful new service uses a directional ultrasonic detector which precisely analyses an acoustic signal from each network asset in turn.
• Other methods include partial discharge ( PD ) testing, using either fixed or portable testers, and acoustic emission testing using surface-mounted transducers ( for oil equipment ) or ultrasonic detectors used in outdoor switchyards.
• The pink and white device, shaped like a baby's bottle, includes an ultrasonic detector that lets parents listen to the fetal heart beat, as well as a microphone through which the parent can talk to the baby.