A roadway freezing point sensor including an active cooler, a cold thermal link, a sample well and a temperature sensor

摘要

A roadway freezing point sensor comprises: a sensor module configured to be embedded in a roadway, the sensor module comprises an active cooler (30), a cold thermal link (32) in thermal contact with the active cooler (30), a sample well (20) adjacent the thermal link, and a temperature sensor adjacent the sample well; the sample well comprises a first surface (42) in thermal contact with the temperature sensor and a second surface (44) in thermal contact with the thermal link (32); the thermal link (32) having a thermal conductivity greater than 1 W/m-K closely adjacent the second surface (44) of the sample well (20). A roadway freezing point sensor further comprises a thermally insulating cover (14) disposed over a portion of the cold thermal link (32) spaced from the sample well (20).