First SMT thermopile array sensor identifies movement, direction and multiple objects

28-01-2015 | Panasonic | New Technologies

Panasonic Automotive & Industrial Systems has launched the first-ever
surface mount thermopile array sensor. Grid-EYE features 64 thermopile
elements in an 8 x 8 grid format that detect absolute temperatures by
infrared radiation. The device is able to measure actual temperature and
temperature gradients, providing thermal images.

It is easily possible to detect multiple persons, identify positions and
direction of movement, almost independent of ambient light conditions
without disturbing privacy as with conventional cameras. Cost-effective and
compact solutions for contactless temperature measurement across the entire
specified area can be and with very accurate results. The built-in silicon
lens provides a viewing angle of 60°. The measurement values can be read out
via I²C interface in 1 or 10 frames per second. The interrupt signal output
delivers a quick response to time-critical events or additional energy
saving capabilities in stand-by mode, offering a high degree of flexibility,
says the company.

Measuring 11.6mm x 4.3mm x 8mm, Grid-EYE arrays have an operating voltage of
3.3V or 5V and a typical current consumption of 4.5mA (normal mode); 0.8mA
(stand-by mode); and 0.2mA (sleep mode). Object temperature range is 0C to
80C for the high gain amplification version and -20 to 100C with low gain.
Overall Temperature accuracy is +/- 2.5C with an NETD (Noise Equivalent
Temperature Difference) of +/- 0.5C, depending on P/N.

Compared to single element thermopile sensors and pyro-electric detectors,
Grid-EYE sensors offers extended possibilities for detecting persons and
objects, enabling advanced applications such as digital signage, security,
lighting control, kiosks / ATMs, medical imaging, automatic doors and people
counting.

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