INFRARED RAY IMAGE PICKUP DEVICE FOR DETECTING FAULTY PART

摘要

PURPOSE:To surely detect even a fault for a monitor object having a timewise slow temperature rise change by taking a difference between temperature information in real time and average temperature information within a prescribed time. CONSTITUTION:A 1st memory means 20 writes a current temperature information one after another detected sequentially in real time from an infrared ray image pickup section and a 2nd memory means 21 fetches the temperature information one after another detected sequentially in real time from the infrared ray image pickup section within a prescribed time and obtains its mean value from the sum of the information. A fault detection means 22 takes a difference between an output of the 1st memory means 20 and an output of the 2nd memory means 21 in real time and detects a fault when the difference exceeds a threshold level. Thus, even a fault having a timewise slow temperature rise change is surely detected.