Technology for low-cost PIR security sensors

Kevin C. Liddiard

doi:10.1117/12.758499

8 January 2008 Technology for low-cost PIR security sensors

Kevin C. Liddiard

Proceedings Volume 6835, Infrared Materials, Devices, and Applications; 683515 (2008) https://doi.org/10.1117/12.758499
Event: Photonics Asia 2007, 2007, Beijing, China

Abstract

Current passive infrared (PIR) security sensors employing pyroelectric detectors are simple, cheap and reliable, but have several deficiencies. These sensors, developed two decades ago, are essentially short-range moving-target hotspot detectors. They cannot detect slow temperature changes, and thus are unable to respond to radiation stimuli indicating potential danger such as overheating electrical appliances and developing fires. They have a poor optical resolution and limited ability to recognize detected targets. Modern uncooled thermal infrared technology has vastly superior performance but as yet is too costly to challenge the PIR security sensor market. In this paper microbolometer technology will be discussed which can provide enhanced performance at acceptable cost. In addition to security sensing the technology has numerous applications in the military, industrial and domestic markets where target range is short and low cost is paramount.

Citation Download Citation

Kevin C. Liddiard "Technology for low-cost PIR security sensors", Proc. SPIE 6835, Infrared Materials, Devices, and Applications, 683515 (8 January 2008); https://doi.org/10.1117/12.758499

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