OBSTACLE DETECTING DEVICE USING ULTRASONIC WAVE

PROBLEM TO BE SOLVED: To prevent misdetection caused by detouring waves. SOLUTION: A signal including a detouring component received by a receiving sensor 12 and a reflected component from a body is supplied to a detour canceling circuit 20 through a receiving circuit 18. The detour canceling circui...

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Bibliographic Details
Main Author SAKAI YOSHIMITSU
Format Patent
LanguageEnglish
Published 18.06.1999
Edition6
Subjects
ANALOGOUS ARRANGEMENTS USING OTHER WAVES
DETECTING MASSES OR OBJECTS
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
GEOPHYSICS
GRAVITATIONAL MEASUREMENTS
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
PERFORMING OPERATIONS
PHYSICS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
TESTING
TRANSPORTING
VEHICLES IN GENERAL
VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISEPROVIDED FOR
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Summary:PROBLEM TO BE SOLVED: To prevent misdetection caused by detouring waves. SOLUTION: A signal including a detouring component received by a receiving sensor 12 and a reflected component from a body is supplied to a detour canceling circuit 20 through a receiving circuit 18. The detour canceling circuit 20 compares a received signal with a reference signal by using a comparator to remove the detouring component. The pulse width of the reference signal is supplied to a control circuit 22 and it is larger than that supplied to a pulse transmitting circuit 16. Consequently, the detouring component which arrives with a time delay is removed so as to output only the reflected component.
Bibliography:Application Number: JP19970323278