| 摘要 |
PCT No. PCT/AU95/00345 Sec. 371 Date Dec. 18, 1996 Sec. 102(e) Date Dec. 18, 1996 PCT Filed Jun. 13, 1995 PCT Pub. No. WO95/35493 PCT Pub. Date Dec. 28, 1995A detector for detecting the presence of ice, water, mist, frost or other solids or liquids on a sensing surface is provided. The sensing surface is provided by a medium substantially transparent to electromagnetic radiation and solids or liquids are deposited on the surface. A transmitter directs radiation onto the surface and a receiver is responsive to radiation reflected from the surface. A discriminator circuit receivers an output from the receiver and provides an output indicative of whether a solid or a liquid is present on the surface.
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