Abstract
We have developed a new type of pyroelectric infrared (IR) detector that contains a sensing part and a solid-state chopper with two bimorph vibrators and two slit plates in the same package. This detector (M-type IR detector) features high reliability, small volume and low electric-power consumption compared with conventional pyroelectric IR detectors using a rotating chopper. In addition, two applications using an M-type IR detector have been investigated. One application is a new type of gas sensor, and the other is non-contact temperature measurement. For the gas sensor, the measurement accuracy is ±0.12% over a 0–20% gas concentration range. The non-contact temperature measurement system is used in a permanent-wave machine. In this system, the temperature of the hair can be accurately measured and automatically controlled. The accuracy of measurement is ±0.15°C over the temperature range 34–64°C.
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