Obstacle detection device
First Claim
1. An obstacle detection device, comprising:
- a plurality of detection units which are respectively assigned to a plurality of detection areas to perform signal transmission-reception operations with respect to the detection areas, the signal transmission-reception operation of the detection unit including send of detection signal to the detection area allotted thereto and reception of reflection signal from the detection area allotted thereto;
an operation control unit which controls the detection unit so that the detection unit performs the signal transmission-reception operation responding to at least one of a plurality of kinds of operation timing signals, which are repeated at a predetermined periodicity; and
a determination unit which counts a number of continuous reception times of the reflection signal of the detection unit, and determines a detection of an obstacle in the detection area allotted to the detection unit when the number of the continuous reception times of the detection unit is larger than or equal to a predetermined value, wherein the signal transmission-reception operation of the detection unit which commenced to receive the reflection signal is provided by the operation control unit with the operation timing signal having a periodicity shorter than the predetermined periodicity.
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Abstract
An obstacle detection device has detection units, each of which performs a signal transmission-reception operation for sending detection signal to a detection area allotted thereto and receiving reflection signal from the detection area, an operation control unit for controlling the detection unit so that the detection unit performs the signal transmission-reception operation responding to at least one of a plurality of kinds of operation timing signals repeated at a predetermined periodicity, and a determination unit which counts a number of continuous reception times of the reflection signal of the detection unit and determines an obstacle detection in the detection area when the number of the continuous reception times thereof is larger than or equal to a predetermined value. The transmission-reception operation of the detection unit which commenced to receive the reflection signal is provided by the operation control unit with the operation timing signal having a periodicity shorter than the predetermined periodicity.
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Citations
14 Claims
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1. An obstacle detection device, comprising:
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a plurality of detection units which are respectively assigned to a plurality of detection areas to perform signal transmission-reception operations with respect to the detection areas, the signal transmission-reception operation of the detection unit including send of detection signal to the detection area allotted thereto and reception of reflection signal from the detection area allotted thereto;
an operation control unit which controls the detection unit so that the detection unit performs the signal transmission-reception operation responding to at least one of a plurality of kinds of operation timing signals, which are repeated at a predetermined periodicity; and
a determination unit which counts a number of continuous reception times of the reflection signal of the detection unit, and determines a detection of an obstacle in the detection area allotted to the detection unit when the number of the continuous reception times of the detection unit is larger than or equal to a predetermined value, wherein the signal transmission-reception operation of the detection unit which commenced to receive the reflection signal is provided by the operation control unit with the operation timing signal having a periodicity shorter than the predetermined periodicity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification