ULTRASONIC DETECTION APPARATUS

This invention relates to an ultrasonic detection apparatus, in which ultrasonic wave is produced by a constant frequency oscillator provided at the side of transmission, said wave is transmitted through a transmitting transducer and received by a receiving transducer, the output of the receiving tr...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	UNOUE H,JA, KAWAGUCHI S,JA, MORI H,JA, OHASI H,JA, OKAMOTO S,JA
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES BASIC ELECTRONIC CIRCUITRY DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES ELECTRICITY LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES MEASURING PHYSICS PULSE TECHNIQUE RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING
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Beschreibung
Zusammenfassung:	This invention relates to an ultrasonic detection apparatus, in which ultrasonic wave is produced by a constant frequency oscillator provided at the side of transmission, said wave is transmitted through a transmitting transducer and received by a receiving transducer, the output of the receiving transducer is amplified and rectified, and then a part of the thus rectified output is positively fed back to an amplifier of the transmittance side through a variable gain circuit.