sonar transducer การใช้

• The sonar transducer is retracted within the hull at speeds above 14 kts.
• The returning waves vibrate the sonar transducers, generating electrical signals that form the images.
• In early sonar transducers, during World War II, nickel was used as a magnetostrictive material.
• The sound bounces off the target object and returns an  echo to the sonar transducer.
• These other instruments include Sonar transducers, integration with 2 Way Radio communication devices and emergency locators ( EPIRB ).
• ADP crystals are piezoelectric, a property required in some active sonar transducers ( the alternative being transducers that use magnetostriction ).
• Acoustic releases can generally be controlled from the surface vessel, by lowering a sonar transducer into the water ( figure 3 ).
• Nickel scroll-wound ring transducers were used for high-power low-frequency operations, with size up to 13 feet in diameter, probably the largest individual sonar transducers ever.
• A high source level provides long range search capabilities, improved figure of merit, and a high-speed reeling machine to achieve maximum depth and retrieve the sonar transducer rapidly.
• The maturity of radio communication and sonar technology made it possible to combine a sonar transducer, batteries, a radio transmitter and whip antenna, within a self-contained air-deployed floating ( sono ) buoy.
• Active sonar is also used to measure distance through water between two sonar transducers or a combination of a hydrophone ( underwater acoustic microphone ) and projector ( underwater acoustic speaker ).