Thermopile Sensor Circuit Diagram

The sensor must only see the object being measured and nothing else to get an accurate temperature reading.

Thermopile sensor circuit diagram.

A thermopile is an electronic device that converts thermal energy into electrical energy it is composed of several thermocouples connected usually in series or less commonly in parallel such a device works on the principle of the thermoelectric effect i e generating a voltage when its dissimilar metals thermocouples are exposed to a temperature difference. I account for this in the sketch with a constant called verr. The sensor reads the temperature over the entire area it sees. A thermocouple is an electrical device consisting of two dissimilar electrical conductors forming an electrical junction a thermocouple produces a temperature dependent voltage as a result of the thermoelectric effect and this voltage can be interpreted to measure temperature thermocouples are a widely used type of temperature sensor.

A temperature sensing circuit using a thermopile sensor is provided which includes a thermopile sensor generating a voltage corresponding to an incidence amount of infrared rays means for amplifying the output of the thermopile sensor means for compensating for an offset of the amplifying means and means for removing the output of the offset compensating means from the output of the. Cross section through a thermopile sensor showing all relevant parts table 1. Just about all parts in the diagram are as looked at from top meaning through the component angle of a pcb. Parts of a thermopile sensor and their function part function thermopile chip sensing element converts radiation into voltage reference sensor measures the temperature of the sensor package i e.

The temperature of the cold contacts window filter and or lens. Thermopile array measurement thermopile flow measurements bridge sensor interface gesture recognition 4 simplified thermopile array system analog supply vs. Commercial thermocouples are inexpensive interchangeable. Thermopile infrared ir non contact temperature measurement sensors are available with various lens and filters allowing use in multiple applications from industrial pyrometers to climate controls and medical devices.

The circuit itself seems to add about 0 6mv to the thermopile raw reading.