ICING INDICATOR Russian patent published in 2015 - IPC G08B19/00 

FIELD: physics.

SUBSTANCE: icing indicator comprises a unit for indicating the degree of icing, a unit for indicating the overshooting of the allowable degree of icing, first and second threshold devices, a pulse generator, a power amplifier, an optical emitter, transmitting and receiving lenses, first and second polarisers, a first polariser rotating device, a pulse former, a test surface for depositing ice, a photodetector, an amplifier, a switch, first and second filters, detectors and integrators, a computing device, a logic device and an alarm device. The first polariser comprises N elements, where N is a natural number, which are polarised orthogonally relative to the rotation axis thereof and separated in the rotation plane of the first polariser by optically transparent intervals.

EFFECT: high reliability of the signalling device.

3 dwg