ULTRASONIC TRANSMITTING-RECEIVING CIRCUIT AND OBJECT DETECTOR FOR VISUALLY HANDICAPPED PERSON

PROBLEM TO BE SOLVED: To provide an ultrasonic transmitting-receiving circuit of simple circuit constitution by constituting a receiving part, utilizing an amplifier of high sensitivity and to provide an object detector highly convenient to a visually handicapped person and miniaturized using the ul...

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Bibliographische Detailangaben
1. Verfasser:	TAKAI TAKUO
Format:	Patent
Sprache:	eng
Schlagworte:	ANALOGOUS ARRANGEMENTS USING OTHER WAVES BANDAGES, DRESSINGS OR ABSORBENT PADS DEAF-AID SETS DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF,TUBULAR STRUCTURES OF THE BODY, E.G. STENTS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FILTERS IMPLANTABLE INTO BLOOD VESSELS FIRST-AID KITS FOMENTATION HUMAN NECESSITIES HYGIENE LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS MEASURING MEDICAL OR VETERINARY SCIENCE ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES PHYSICS PROSTHESES PUBLIC ADDRESS SYSTEMS RADIO DIRECTION-FINDING RADIO NAVIGATION TESTING TREATMENT OR PROTECTION OF EYES OR EARS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an ultrasonic transmitting-receiving circuit of simple circuit constitution by constituting a receiving part, utilizing an amplifier of high sensitivity and to provide an object detector highly convenient to a visually handicapped person and miniaturized using the ultrasonic transmitting-receiving circuit. SOLUTION: The receiving part 12 is provided with a receiving amplifier capable of discriminating receive signals from other noise signals with high accuracy. Driving pulse sent from a transmitting part 11 to an ultrasonic vibrator 20 can therefore be small, so that there is no need to provide the transmitting part 11 with an amplifier part, and a diode clipping circuit or the like can be omitted. As a result, circuit constitution can be simplified. In this ultrasonic transmitting-receiving circuit 10, driving pulse is further made small, so that the transmitting part 11 is series-connected utilizing a terminal resistance R1 connected in parallel to the ultrasonic vibrator 20. Circuit constitution can thereby be further simplified.