Temperature distribution measuring device

摘要

The device has an outer cylinder (7) with several slits (701,702) in its sides. The device also has an inner cylinder which rotates inside the outer cylinder. The inner cylinder has one slit in its side. The device also has a sensor arrangement of infrared sensors arranged linearly inside the inner cylinder. The width (X) of each slit in the outer cylinder changes according to its angle ( alpha ) to a plane through the middle axis of the outer cylinder and the middle axis of the object being measured, to equalise the measurement time of the object through each slit. The rotation rate of the inner cylinder changes to equalise the input times of infrared beams from the object into the slits. In another arrangement, the outer cylinder is rotatable. Infrared beams from the object are measured at two positions by rotation of the outer cylinder by an angle corresponding to half of the angle (K) formed by adjacent slits.