| 摘要 |
PURPOSE:To obtain a small and thin temperature sensor with a high reliability, by making an infrared rays intermittently incident on an infrared rays detection element with a chopper made up of a magnetic fluid shutter. CONSTITUTION:As a magnetic fluid shutter 2 is driven ON or OFF by a square wave provided from a driving circuit 3, an infrared rays radiated from an object (A) to be detected is interrupted by the ON or OFF operation of the shutter 2 to be made incident on an infrared rays detection element 1. In response to the ON or OFF action of the shutter 2, the element 1 outputs a detection signal and the detection signal will be a value corresponding to the intensity radiation of infrared rays of the object (A), namely, temperature. Therefore, the temperature of the object (A) can be measured by processing the detection signal outputted from the element 1. The shutter 2 works by moving or driving a magnetic fluid sealed according to a driving signal from the circuit 3 thereby enabling the construction of a small and thin temperature sensor with a high reliability. |
