| 摘要 |
An apparatus for detecting and for optically indicating from afar the temperature condition of an upper layer of a road surface includes a thermally conductive temperature sensor positioned within the upper layer of the road surface to sense the temperature thereof. A temperature indicator is positioned on a post above the road surface. The temperature indicator includes a liquid crystal agent having a first optically perceivable condition substantially at a temperature above the freezing point of water and a second optically perceivable condition substantially at a temperature below the freezing point of water. A thermally conductive connector thermally connects the temperature sensor and the liquid crystal agent, such that the temperature sensed by the sensor is conveyed to the liquid crystal agent, whereby the liquid crystal agent exhibits the respective condition thereof representative of the temperature of the road surface. |
