PROBLEM TO BE SOLVED: To provide a radiation amount measurement device capable of suppressing a measurement error, and measuring further accurately.SOLUTION: A measurement part 12 can be attached to a skin surface 1 of a subject, in a state of forming a closed space 21 between the measurement part and the skin surface 1. An upstream channel 13 and a downstream channel 14 are provided so as to communicate with the closed space 21. Flow feeding means 15 is provided for flowing a measurement fluid from the upstream channel 13 toward the downstream channel 14 through the closed space 21. A pair of measurement sensors 17a and 17b are disposed so as to measure the same physical amount of the measurement fluid flowing in the vicinity of the measurement part 12 on the upstream channel 13 and the downstream channel 14, respectively. The respective measurement sensors 17a and 17b are formed of a humidity sensor capable of measuring humidity of the measurement fluid, a temperature sensor capable of measuring temperature of the measurement fluid, or an absorption light intensity meter capable of measuring absorption of the measurement fluid.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2017,JPO&INPIT【課題】測定誤差を抑制し、より正確な測定を行うことができる発散量測定装置を提供する。【解決手段】測定部12が、被測定者の皮膚面1に、その皮膚面1との間に閉鎖空間21を形成して取付可能に設けられている。上流側流路13および下流側流路14が、それぞれ閉鎖空間21に連通するよう設けられている。送流手段15が、上流側流路13から閉鎖空間21を通って下流側流路14に向かって測定用流体を流すよう設けられている。1対の測定センサ17a,17bが、それぞれ上流側流路13および下流側流路14の測定部12の近傍を流れる測定用流体の同じ物理量を測定可能に設けられている。各測定センサ17a,17bは、測定用流体の湿度を測定可能な湿度センサ、測定用流体の温度を測定可能な温度センサ、または測定用流体の吸光度を測定可能な吸光光度計から成っている。【選択図】図2
