Obstruction detecting apparatus
First Claim
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1. An obstruction detection apparatus comprising:
- a plurality of ultrasonic wave transmitter/receiver means installed on a vehicle for transmitting ultrasonic wave and for receiving the ultrasonic wave reflected by an obstruction;
control means including a distance table for calculating a distance between said vehicle and said obstruction based on a time interval from a time at which the ultrasonic wave is transmitted to a time at which the ultrasonic wave reflected by said obstruction is received by said plurality of ultrasonic wave transmitter/receiver means, and for storing data corresponding to the calculated distance into memory fields forming said distance table;
display means for displaying a range where no obstruction is detected by said plurality of ultrasonic wave transmitter/receiver means based on the data stored in said distance table; and
alarm means for sounding an alarm about said obstruction for a driver of said vehicle based on the data stored in said distance table,wherein said distance table comprising a plurality of memory fields corresponding to a case in which a same ultrasonic wave transmitter/receiver means transmits said ultrasonic wave and receives the ultrasonic wave reflected by said obstruction and a case in which a different ultrasonic wave transmitter/receiver means transmits the ultrasonic wave and receives the ultrasonic wave reflected by said obstruction.
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Abstract
In the obstruction detection apparatus incorporated in a vehicle (11), ultrasonic wave transmitter/receiver (16 to 19 171) for changing a combination of transmitting of ultrasonic waves and of receiving of reflected ultrasonic waves, a CPU (20) calculates a distance between the vehicle (11) and an obstruction and stores data corresponding to the calculated distance into the distance table (23), and the LC display device (27) displays the obstruction on display bars of a lattice shape corresponding to the data stored in the distance table (23), and a buzzer (26) sounds an alarm for a driver.
306 Citations
23 Claims
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1. An obstruction detection apparatus comprising:
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a plurality of ultrasonic wave transmitter/receiver means installed on a vehicle for transmitting ultrasonic wave and for receiving the ultrasonic wave reflected by an obstruction; control means including a distance table for calculating a distance between said vehicle and said obstruction based on a time interval from a time at which the ultrasonic wave is transmitted to a time at which the ultrasonic wave reflected by said obstruction is received by said plurality of ultrasonic wave transmitter/receiver means, and for storing data corresponding to the calculated distance into memory fields forming said distance table; display means for displaying a range where no obstruction is detected by said plurality of ultrasonic wave transmitter/receiver means based on the data stored in said distance table; and alarm means for sounding an alarm about said obstruction for a driver of said vehicle based on the data stored in said distance table, wherein said distance table comprising a plurality of memory fields corresponding to a case in which a same ultrasonic wave transmitter/receiver means transmits said ultrasonic wave and receives the ultrasonic wave reflected by said obstruction and a case in which a different ultrasonic wave transmitter/receiver means transmits the ultrasonic wave and receives the ultrasonic wave reflected by said obstruction. - View Dependent Claims (2, 3, 4, 6, 7)
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5. An obstruction detection apparatus comprising:
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a plurality of ultrasonic wave transmitter/receiver means installed on a vehicle for transmitting ultrasonic wave and for receiving the ultrasonic wave reflected by an obstruction; control means including a distance table for calculating a distance between said vehicle and said obstruction based on a time interval from a time at which the ultrasonic wave is transmitted to a time at which the ultrasonic wave reflected by said obstruction is received by said plurality of ultrasonic wave transmitter/receiver means, and for storing data corresponding to the calculated distance into memory fields forming said distance table; display means for displaying a range where said obstruction is detected by said plurality of ultrasonic wave transmitter/receiver means based on the data stored in said distance table; and alarm means for sounding an alarm about said obstruction for a driver of said vehicle based on the data stored in said distance table, wherein said distance table comprising a plurality of memory fields corresponding to a case in which a same ultrasonic wave transmitter/receiver means transmits said ultrasonic wave and receives the ultrasonic wave reflected by said obstruction and a case in which a different ultrasonic wave transmitter/receiver means transmits the ultrasonic wave and receives the ultrasonic wave reflected by said obstruction. - View Dependent Claims (8)
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9. An obstruction detection apparatus comprising:
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a first transmitter installed on a vehicle that transmits a first transmitted wave towards an obstruction, wherein the first transmitted wave reflects off of the obstruction to produce a first reflected wave; a first receiver installed on the vehicle that receives at least a first reflected portion of the first reflected wave; a second receiver installed on the vehicle that receives at least a second reflected portion of the first reflected wave; a control circuit that calculates a distance between the vehicle and the obstruction based on a first reception time when the first receiver receives at least the first reflected portion of the first reflected wave and based on a second reception time when the second receiver receives at least the second reflected portion of the first reflected wave, wherein the control circuit generates distance data corresponding to the calculated distance; and a display circuit that provides information to a driver of the vehicle, wherein the information indicates the distance between the vehicle and the obstruction based on the distance data. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification