Device for continuously measuring the local skin-sweating rate

摘要

A device for continuously measuring the local skin sweating rate includes a sensor (1) used for applying to human skin at a measuring point and an air supply element (10) for supplying dehumidified air to the sensor (1). A first chamber (3) is formed between the sensor and the skin for mixing water vapor perspired from the skin and the dehumidified air supplied from the air supply element. A second chamber (6) is also formed within the sensor (1) and connected with the first chamber (3) through a communicating hole (31). The device further includes a humidity detector (4) in the second chamber. The humidity detector (4) varies its capacitance according to the relative humidity of the mixture. A temperature detecting element (5) is disposed in the second chamber for detecting the temperature in the second chamber and for outputing signals corresponding to the temperature. A humidity detector output element (7) is mounted on the sensor (1) and is electrically connected with the humidity detector (4) for outputing a humidity signal. A processor (18) calculates the sweating rate, which is independent of the temperature of the mixture, based on the humidity and temperature signals. An element is provided for continuously recording the data of the sweating rate obtained from the processor.