HEAD-MOUNTED DEVICE, HEAT STROKE PREVENTION SYSTEM, AND REHYDRATION ALARM SYSTEM

The invention provides a head-mounted device, a heat stroke prevention system, and a rehydration alarm system. This head-mounted device is provided with: an outer shell; a first flow channel which isan empty space between a wearer's head and the outer shell; a second flow channel provided in the outer shell in such a manner as to be connected with the first flow channel; a fan which blows air from one of the first and second flow channels to the other; a first humidity sensor for measuring the absolute humidity of intake air flowing into one of the first and second flow channels; a second humidity sensor for measuring the absolute humidity of exhaust air discharged from the other of the first and second flow channels. 本发明提供一种头部佩戴装置、中暑预防系统以及水分补充警告系统，该头部佩戴装置具备：外壳；第一流路，是佩戴者的头部与外壳之间的间隙；第二流路，设于外壳并且连接于第一流路；风扇，从第一流路和第二流路中的一方向另一方送风；第一湿度传感器，用于测量进入第一流路和第二流路中的一方的吸入空气的绝对湿度；以及第二湿度传感器，用于测量从第一流路和第二流路中的另一方排出的排出空气的绝对湿度。