Thermoelectric infrared imager and automotive applications

Masaki Hirota, Fuminori Satou, Masanori Saito, Youichi Kishi, Yasushi Nakajima, Makato Uchiyama

Research output: Contribution to journalConference article

15 Citations (Scopus)

Abstract

This paper describes a newly developed thermoelectric infrared imager having a 48 × 32 element thermoelectric focal plane array (FPA) and an experimental vehicle featuring a blind spot pedestrian warning system, which employs four infrared imagers. The imager measures 100 mm in width, 60 mm in height and 80 mm in depth, weighs 400 g, and has an overall field of view (FOV) of 40 deg × 20 deg. The power consumption of the imager is 3 W. The pedestrian detection program is stored in a CPU chip on a printed circuit board (PCB). The FPA provides high responsivity of 2,100 V/W, a time constant of 25 msec, and a low cost potential. Each element has external dimensions of 190 μm × 190 μm, and consists of six pairs of thermocouples and an Au-black absorber that is precisely patterned by low-pressure evaporation and lift-of technologies. The experimental vehicle is called the Nissan ASV-2 (Advanced Safety Vehicle-2), which incorporates a wide range of integrated technologies aimed at reducing traffic accidents. The blind spot pedestrian warning system alerts the driver to the presence of a pedestrian in a blind spot by detecting the infrared radiation emitted from the person's body. This system also prevents the vehicle from moving in the direction of the pedestrian.

Original languageEnglish
Pages (from-to)312-321
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume4369
DOIs
Publication statusPublished - Dec 1 2001
Externally publishedYes
EventInfrared Technology and Applications XXVII - Orlando, FL, United States
Duration: Apr 16 2001Apr 20 2001

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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