| 摘要 |
A modulated light source (31) transmits light pulses through an optical channel (20) to an optical sensor (10) remotely located from the cockpit and mounted proximate an aerodynamic surface (14) of an aircraft. In the absence of ice a baseline amount of light is returned via the channel. When water, ice, or de-icing fluid covers the light sensor, a detectable variable amount of light pulses are returned and detected by a light detector (34), generating an electrical output signal that varies as a function of the type, amount, and rate of substance accretion. Alternatively, the remote light sensor (70) may be fuselage mounted (72) with an airfoil shaped probe (71), or the optical sensor is mounted in the throat (93) of a carburetor (92) to detect carburetor ice.
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