Title:
OBJECT DETECTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/051669
Kind Code:
A1
Abstract:
An ECU (26) of an object detection device (2) stops the transmission of probe waves from each of a plurality of ultrasonic sensors (21-24) when the travel speed of a vehicle (10) is greater than or equal to a prescribed speed and counts, for each of the plurality of ultrasonic sensors, the number of times a reception wave greater than or equal to a threshold intensity has been received during the stopping of the transmission of the probe waves. The ECU acquires a first count value that is the count value for the number of receptions by a first sensor that is one sensor from among the plurality of ultrasonic sensors and a second count value that is the count value for the number of receptions by a second sensor that is different from the first sensor. The ECU determines that snow has accumulated on the first sensor if the first count value is smaller than the second count value and the difference between a representative value set on the basis of the second count value and the first count value is greater than or equal to a prescribed value.
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Inventors:
HARADA TAKETO (JP)
MATSUURA MITSUYASU (JP)
KOYAMA YU (JP)
MATSUURA MITSUYASU (JP)
KOYAMA YU (JP)
Application Number:
PCT/JP2017/028282
Publication Date:
March 22, 2018
Filing Date:
August 03, 2017
Export Citation:
Assignee:
DENSO CORP (JP)
International Classes:
G01S7/526; G01S15/87; G01S15/93
Domestic Patent References:
| WO2015155937A1 | 2015-10-15 | |||
| WO2015071110A1 | 2015-05-21 |
Foreign References:
| JP2016050881A | 2016-04-11 | |||
| JPH11328585A | 1999-11-30 |
Attorney, Agent or Firm:
YOU-I PATENT FIRM (JP)
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