Patent ID: 9719866
Date: 2017-08-01
CPC Classifications: G01K

Claim:
1. A sensor failure detection device for a plurality of sensors, comprising: a storage that stores temperatures measured by the plurality of sensors; a predictor that predicts a future temperature distribution expected to occur at a certain time by performing a thermal fluid simulation based on the temperatures stored in the storage; a selector that selects a first target sensor from among the plurality of sensors; a calculator that calculates a difference value between a predicted temperature of the first target sensor in the temperature distribution and a measured temperature measured by the first target sensor at the certain time; a detector that determines whether the difference value exceeds a given threshold value; an identifier that identifies whether the first target sensor functions normally or malfunctions; a determinator that determines that the first target sensor is a failed sensor when a number of times that the first target sensor is identified as a malfunctioning sensor by the identifier exceeds a predetermined number of times; and an iterator that detects an upstream sensor located on a windward side of the first target sensor, from prediction of a flow field of air due to the thermal fluid simulation, and selects the upstream sensor as a second target sensor.