초록 ▼

Apparatus that detects the presence and condition of precipitation on the surface of a pathway. The apparatus has a block of electrically insulative material adapted to be embedded in the pathway with a top surface exposed to precipitation. A sensor is embedded in the block for sensing a physical pr

Apparatus that detects the presence and condition of precipitation on the surface of a pathway. The apparatus has a block of electrically insulative material adapted to be embedded in the pathway with a top surface exposed to precipitation. A sensor is embedded in the block for sensing a physical property of the precipitation to produce a sensor output which is also influenced by a depth of the precipitation. Part of the top surface of the block has a well that is generally curved in outline above the sensor for gathering precipitation for the sensor. Advantageously, the influence of precipitation depth on the sensor is diminished. Other apparatus and methods are also disclosed.

대표청구항 ▼

Apparatus for detecting the presence and condition of precipitation on the surface of a pathway, comprising: a block of electrically insulative material adapted to be embedded in the pathway and having a top surface exposed to precipitation; and sensor means embedded in said block for sensing a phys

Apparatus for detecting the presence and condition of precipitation on the surface of a pathway, comprising: a block of electrically insulative material adapted to be embedded in the pathway and having a top surface exposed to precipitation; and sensor means embedded in said block for sensing a physical property of the precipitation to produce a sensor output which is also influenced by a depth of the precipitation, wherein part of the top surface of the block has a well that is generally curved in outline above said sensor means for gathering precipitation for said sensor means, thereby diminishing the influence of precipitation depth on said sensor means.