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Ultrasonic object detection apparatus

  • US 10,371,805 B2
  • Filed: 10/21/2015
  • Issued: 08/06/2019
  • Est. Priority Date: 10/22/2014
  • Status: Active Grant
First Claim
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1. An ultrasonic object detection apparatus mounted to a vehicle and comprising:

  • at least one transceiver that transmits a transmission wave as an ultrasonic wave to outside of the vehicle and receives a reflection wave of the transmission wave reflected by an object;

    at least one reception circuit that detects a signal level of the reflection wave received by the transceiver;

    at least one object detector that detects an object, based on a comparison between the signal level detected by the reception circuit and an object detection threshold;

    at least one sensor temperature detector that detects an ambient temperature of the transceiver; and

    a detection sensitivity adjuster that performs a detection sensitivity adjustment, which is an adjustment of at least one of a detection sensitivity of the reception circuit and the object detection threshold, based on the ambient temperature detected by the at least one sensor temperature detector, wherein;

    the at least one transceiver includes a plurality of transceivers;

    the at least one reception circuit includes a plurality of reception circuits;

    the at least one object detector includes a plurality of object detectors;

    the at least one sensor temperature detector includes a plurality of sensor temperature detectors;

    the plurality of transceivers, the plurality of reception circuits, the plurality of object detectors, and the plurality of sensor temperature detectors configure a plurality of ultrasonic sensors, respectively; and

    the detection sensitivity adjuster uses a lowest ambient temperature among a plurality of ambient temperatures respectively detected by the plurality of sensor temperature detectors arranged at the plurality of ultrasonic sensors correspondingly, to perform the detection sensitivity adjustment.

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