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Lateral distance sensor diagnosis apparatus

  • US 10,429,506 B2
  • Filed: 10/21/2015
  • Issued: 10/01/2019
  • Est. Priority Date: 10/22/2014
  • Status: Active Grant
First Claim
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1. A lateral distance sensor diagnosis apparatus cooperating with a lateral distance sensor that detects a distance with an object existing in a lateral region relative to a vehicle by transmitting search waves towards the lateral region and receiving reflected waves reflected by the object in a propagation range of the search waves,the lateral distance sensor diagnosis apparatus comprising:

  • a detection result acquisition section that acquires a detection distance that is a distance detected by the lateral distance sensor;

    a vehicle information acquisition section that acquires vehicle information that is information indicating a travel state of the vehicle, the vehicle information including a steering angle;

    a travel enabled distance acquisition section that determines whether the vehicle is estimated to have contact with the object detected by the lateral distance sensor because of a turning radius difference between tracks followed by front and rear inner wheels when turning based on the detection distance acquired by the detection result acquisition section and the steering angle included in the vehicle information, the travel enabled distance acquisition section acquiring, based on the detection distance, a travel enabled distance when determining that the vehicle is estimated to have contact with the object, the travel enabled distance being a distance the vehicle is permitted to travel before the vehicle has contact with the object;

    a movement distance calculation section that calculates a movement distance of the vehicle from when the detection result acquisition section acquires the detection distance that the travel enabled distance acquisition section uses to acquire the travel enabled distance; and

    a diagnosis test section that determines whether the lateral distance sensor operates normally by comparing, when the travel enabled distance acquisition section determines that the vehicle is estimated to have contact with the object, the movement distance calculated by the movement distance calculation section with the travel enabled distance acquired by the travel enabled distance acquisition section,wherein the diagnosis test section determines that the lateral distance sensor fails to operate normally when the movement distance becomes greater than the travel enabled distance under a state being maintained, the state where the steering angle accords with an angle at which the vehicle will have contact with the object.

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