Applied Science

Extech IR250 infrared thermometer disassembly and plans for thermal imaging (2011x18)

Data de estreia: Jun 24, 2011

One of my ongoing projects is to develop a low-cost thermal imaging camera. In this video, I take apart an Extech IR250 infrared thermometer with the intention of grabbing an analog or digital signal so that I can record temperature measurements while using a scanning or image processing device to select portions of the scene being examined. Unfortunately, it looks like the analog circuitry is completely sealed inside a custom IC that is hidden under a blob of potting material. I'll remove the IR sensor from the board and build my own analog amplification and digitization hardware. Common digital output IR thermometer sensor: http://www.melexis.com/Infrared-Thermometer-Sensors/Infrared-Thermometer-Sensors/MLX90614-615.aspx TPS334 sensor datasheet: http://www.datasheetcatalog.org/datasheet/perkinelmer/TPS334.pdf Analog Devices app note regarding thermopile sensors: http://www.analog.com/en/all-operational-amplifiers-op-amps/operational-amplifiers-op-amps/products/technical-articles/using_thermopile_sensor_in_ir_digital_thermometers/resources/fca.html Servo pan/tilt IR imaging scanner project: http://www.cheap-thermocam.tk/ Redshift thermal imaging: http://redshiftsystems.com/site