CSEM Centre Suisse d'Electronique et de Microtechnique SA
发明人:
申请号：
EP17160730.2
公开号：
EP3242112A1
申请日:
2017.03.14
申请国别(地区):
EP
年份:
2017
代理人:
摘要：
Method and device for liquid measurements comprising:- providing a sensor (1) comprising a surface (3) arranged to receive a liquid (5) thereupon, an electrical heating element (7) arranged to heat said surface (3), and an arrangement (11, 13； 7, 15) for measuring a temperature of said surface (3)；- receiving liquid (5) on said sensor surface (3)；- heating said surface (3) by means of said electrical heating element (7) at a known rate (P) while taking a plurality of temperature measurements (T) thereof in function of time (t), said heating being at an absolute temperature of at least 90% of the boiling point (Tb) of said liquid (5) under ambient pressure；- deriving a volume or a flow rate measurement related to said liquid (5) from said electrical heating rate (P) and said temperature measurements (T).The sensor system may be used to measure the volume of small amounts of liquid (e.g. dispensed droplets) or to a wearable device, e.g. a sweat rate sensor, where liquid from the skin of a wearer is transported to the heated surface (3) of the sensor (1) for measuring the flow rate.
