Failure detection apparatus, failure detection method, and computer readable medium

Patent metadata

Field	Value
Publication number	US-11220272-B2
Application number	US-201716644674-A
Country	US
Kind code	B2
Filing date	Nov 13, 2017
Priority date	Nov 13, 2017
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

A detected data acquisition unit ( 21 ) acquires detected data outputted during a past reference period by a sensor ( 31 ) mounted on a moving body ( 100 ). A peripheral data acquisition unit ( 22 ) acquires peripheral data detected by a peripheral body existing on peripheral of the moving body ( 100 ). A failure determination unit ( 23 ) determines whether or not there is a failure in the sensor ( 31 ) based on whether or not the detected data includes detected data that identifies a detected content of which difference from a peripheral content identified from the peripheral data is within a reference scope.

First claim

The invention claimed is:

1. A failure detection apparatus comprising:
processing circuitry to:
acquire detected data that is sensor data outputted during a past reference period by a sensor mounted on a moving body, the sensor data being data from which a position, movement direction, and movement velocity of an object existing on peripheral of the moving body to the moving body are identifiable as detected content,
acquire peripheral data detected by the peripheral body existing on the peripheral of the moving body, the peripheral data being data from which the position, movement direction, and movement velocity of the peripheral body are identifiable as peripheral content, and
determine whether or not there is a failure in the sensor based on whether or not the detected data acquired includes detected data from which a detected content such that a total value is within a reference scope is identified, the total value being calculated by weighting and then adding up each of a difference in the positions, a difference in the movement directions, and a difference in the movement velocities, which are identified from the detected data and the peripheral data.

2. The failure detection apparatus according to claim 1 ,
wherein the detected data indicates time of output by the sensor mounted on the moving body;
wherein the peripheral data is data that is acquired from sensor data outputted by a sensor mounted on the peripheral body, and indicates time of output by the sensor mounted on the peripheral body; and
wherein the processing circuitry calculates a position of the peripheral body at the time that the detected data indicates, based on a lag between the time that the detected data indicates and the time that the peripheral data indicates, and the movement direction and the movement velocity identified from the peripheral data, and then treats the calculated position as a position that is identified from the peripheral data.

3. The failure detection apparatus according to claim 1 ,
wherein the processing circuitry determines whether or not there is the failure in the sensor for each divided area obtained by dividing a sensing range of the sensor.

4. The failure detection apparatus according to claim 2 ,
wherein the processing circuitry determines whether or not there is the failure in the sensor for each divided area obtained by dividing a sensing range of the sensor.

5. A failure detection method comprising:
acquiring detected data that is sensor data outputted during a past reference period by a sensor mounted on a moving body, the sensor data being data from which a position, movement direction, and movement velocity of an object existing on peripheral of the moving body to the moving body are identifiable as detected content;
acquiring peripheral data detected by the peripheral body existing on the peripheral of the moving body, the peripheral data being data from which the position, movement direction, and movement velocity of the peripheral body are identifiable as peripheral content; and
determining whether or not there is a failure in the sensor based on whether or not the detected data acquired includes detected data from which a detected content such that a total value is within a reference scope is identified, the total value being calculated by weighting and then adding up each of a difference in the positions, a difference in the movement directions, and a difference in the movement velocities, which are identified from the detected data and the peripheral data.

6. A non-transitory computer readable medium storing a failure detection program that causes a computer to execute:
a detected data acquisition process of acquiring detected data that is sensor data outputted during a past reference period by a sensor mounted on a moving body the sensor data being data from which a position, movement direction, and movement velocity of an object existing on peripheral of the moving body to the moving body are identifiable as detected content;
a peripheral data acquisition process of acquiring peripheral data detected by the peripheral body existing on the peripheral of the moving body, the peripheral data being data from which the position, movement direction, and movement velocity of the peripheral body are identifiable as peripheral content; and
a failure determination process of determining whether or not there is a failure in the sensor based on whether or not the detected data acquired by the detected data acquisition process includes detected data from which a detected content such that a total value is within a reference scope is identified, the total value being calculated by weighting and then adding up each of a difference in the positions, a difference in the movement directions, and a difference in the movement velocities, which are identified from the detected data and the peripheral data.

Assignees

• Mitsubishi Electric Corp

Inventors

• Tsushima Naoyuki
• Tanimoto Masahiko
• Abukawa Masahiro

Classifications

• G01S7/497 Primary

  Means for monitoring or calibrating · CPC title

• B60W2050/021

  Means for detecting failure or malfunction · CPC title

• B60W50/0205 Primary

  Diagnosing or detecting failures; Failure detection models · CPC title

• G01S17/42

  Simultaneous measurement of distance and other co-ordinates (indirect measurement G01S17/46) · CPC title

• G01S17/931

  of land vehicles · CPC title