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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1. Verfasser: TAKAI TAKUO
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description 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.
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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.</description><edition>7</edition><language>eng</language><subject>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. 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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.</abstract><edition>7</edition><oa>free_for_read</oa></addata></record>
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subjects 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
title ULTRASONIC TRANSMITTING-RECEIVING CIRCUIT AND OBJECT DETECTOR FOR VISUALLY HANDICAPPED PERSON
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