"PROCEDIMENTO PER GENERARE E/O RICEVERE SEGNALI ULTRASONICI"

In a method for generating and/or for receiving ultrasonic signals by using a piezoelectric crystal, a higher resolution, improved location of faults and detection of the type of fault are achieved by arranging for the crystal to be predeformed continuously during measurement by a DC voltage. At the...

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Bibliographic Details
Main Authors KLAUS ABEND, URSULA ORTHEN
Format Patent
LanguageItalian
Published 05.02.1982
Edition3
Subjects
DEAF-AID SETS
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
FOR PERFORMING MECHANICAL WORK IN GENERAL
GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
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
TESTING
TRANSPORTING
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Summary:In a method for generating and/or for receiving ultrasonic signals by using a piezoelectric crystal, a higher resolution, improved location of faults and detection of the type of fault are achieved by arranging for the crystal to be predeformed continuously during measurement by a DC voltage. At the same time, bipolar pulses can be applied to the quartz crystal, resulting, e.g., in a simplification of the frequency analysis and of the phase shift.
Bibliography:Application Number: IT19820019475