Thermopile array sensor uses IR to detect temperature

29th January 2015

Panasonic

Barney Scott

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Panasonic Automotive & Industrial has launched its first SMT thermopile array sensor. Grid-EYE features 64 thermopile elements in an 8x8 grid format that detect temperatures and temperature gradients by infrared radiation, providing thermal images. It is possible to detect multiple people and identify positions and direction of movement.

The built-in silicon lens provides a viewing angle of 60°, and 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.

Measuring 11.6x4.3x8.0mm, Grid-EYE arrays have an operating voltage of 3.3 or 5V and a typical current consumption of 4.5mA in normal mode, 0.8mA in stand-by mode and 0.2mA in sleep mode. Object temperature range is 0 to +80°C for the high gain amplification version and -20 to +100°C with low gain. Overall Temperature accuracy is ±2.5°C with an NETD (Noise Equivalent Temperature Difference) of ±0.5°C, 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.

Applications include digital signage, security, lighting control, kiosk, ATM, medical imaging, automatic doors and people counting.