INFRARED SENSOR

摘要

An infrared sensor includes a thermopile connected in series with an ambient temperature compensation resistance temperature detector (RTD) and four electrical leads. The thermopile produces a voltage as a function of temperature of a point of interest, while the RTD varies in resistance as a function of ambient temperature. Two of the leads deliver current to energize the RTD. The other two leads are used for sensing voltages produced by the thermopile and the RTD.

主权项

1. An infrared sensor comprising:
a thermopile for producing a voltage as a function of temperature of a point of interest; a resistance temperature detector (RTD) that varies in resistance as a function of ambient temperature, the RTD connected in a series circuit with the thermopile; first and second leads connected to the RTD; a third lead connected to the RTD and the thermopile; and a fourth lead connected to the thermopile.