ULTRASONIC DEVICE

An ultrasonic apparatus (100) includes an ultrasonic transducer (120), a transmitting circuit (110), a receiving circuit (140), a Q-factor measuring circuit (210), and a frequency measuring circuit (250). The ultrasonic transducer is a three-terminal ultrasonic transducer that includes a transmittin...

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Hauptverfasser: NAKAO, Motoyasu, WATANABE, Kosuke
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Sprache:eng ; fre ; ger
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creator NAKAO, Motoyasu
WATANABE, Kosuke
description An ultrasonic apparatus (100) includes an ultrasonic transducer (120), a transmitting circuit (110), a receiving circuit (140), a Q-factor measuring circuit (210), and a frequency measuring circuit (250). The ultrasonic transducer is a three-terminal ultrasonic transducer that includes a transmitting electrode (121), a receiving electrode (122), and a common electrode (123). The transmitting circuit outputs a driving signal to the transmitting electrode to cause the ultrasonic transducer to transmit ultrasonic waves. The receiving circuit receives a receive signal from the receiving electrode. The frequency measuring circuit measures a resonant frequency of the ultrasonic transducer from a reverberation signal in the receive signal. The Q-factor measuring circuit measures a Q factor of the ultrasonic transducer from the reverberation signal in the receive signal.
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The ultrasonic transducer is a three-terminal ultrasonic transducer that includes a transmitting electrode (121), a receiving electrode (122), and a common electrode (123). The transmitting circuit outputs a driving signal to the transmitting electrode to cause the ultrasonic transducer to transmit ultrasonic waves. The receiving circuit receives a receive signal from the receiving electrode. The frequency measuring circuit measures a resonant frequency of the ultrasonic transducer from a reverberation signal in the receive signal. 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language eng ; fre ; ger
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source esp@cenet
subjects ANALOGOUS ARRANGEMENTS USING OTHER WAVES
DEAF-AID SETS
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
FOR PERFORMING MECHANICAL WORK IN GENERAL
GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS
MEASURING
METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY
PERFORMING OPERATIONS
PHYSICS
PUBLIC ADDRESS SYSTEMS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
TESTING
TRANSPORTING
title ULTRASONIC DEVICE
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