SYSTEM FOR MEASURING DISTANCE OF TARGET USING STEP-STARING INFRARED SENSOR UNIT

摘要

PURPOSE: A target distance measurement system using a scanning driving infrared light sensor device is provided to reduce risk of exposure by making the device hard to find from the outside. CONSTITUTION: A target distance measurement system consists of a scanning driving infrared light sensor device(10) and an image processing device(20). The scanning driving infrared light sensor device consists of a scanning mirror(12) and an infrared light sensor(14). The scanning mirror is disposed in the front side and receives infrared from the detected region including the target by repetitively rotating in a predetermined driving period and angle range. The infrared light sensor obtains a first scanning image and a second scanning image of the target by incident infrared light in one rotation position and another rotation position. If an image corresponding to the target exists in the overlapped part of the first scanning image and the second scanning image, the image processing device calculates 3-D distance information of the target by analyzing a correlation of the first scanning image and the second scanning image. [Reference numerals] (14) IR sensor; (20) Image processing device; (A) Sensing area; (AA) Target; (t) First scan image; (t+Δt) Second scan image