OBSTACLE DETECTION DEVICE FOR DETECTING OBSTACLE
First Claim
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1. An obstacle detection device for detecting an obstacle comprising:
- a transmitting and receiving element for transmitting and receiving an ultrasonic wave;
an amplifier for amplifying a received signal corresponding to a received ultrasonic wave; and
a gain controller for controlling a gain of the amplifier,wherein the gain controller increases the gain with time elapsed from a transmission time when the transmitting and receiving element transmits the ultrasonic wave, andwherein the gain controller starts to increase the gain at a rising time when reverberation caused by the transmitted ultrasonic wave is disappeared.
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Abstract
An obstacle detection device for detecting an obstacle includes: a transmitting and receiving element for transmitting and receiving an ultrasonic wave; an amplifier for amplifying a received signal corresponding to a received ultrasonic wave; and a gain controller for controlling a gain of the amplifier The gain controller increases the gain with time elapsed from a transmission time when the transmitting and receiving element transmits the ultrasonic wave. The gain controller starts to increase the gain at a rising time when reverberation caused by the transmitted ultrasonic wave is disappeared.
17 Citations
9 Claims
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1. An obstacle detection device for detecting an obstacle comprising:
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a transmitting and receiving element for transmitting and receiving an ultrasonic wave; an amplifier for amplifying a received signal corresponding to a received ultrasonic wave; and a gain controller for controlling a gain of the amplifier, wherein the gain controller increases the gain with time elapsed from a transmission time when the transmitting and receiving element transmits the ultrasonic wave, and wherein the gain controller starts to increase the gain at a rising time when reverberation caused by the transmitted ultrasonic wave is disappeared. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification