CORNELIS PETRUS HENDRIKS,DAAN ANTON VAN DEN ENDE,RONALD ANTONIE HOVENKAMP,MARK THOMAS JOHNSON,ARJEN VAN DER HORST,ACHIM HILGERS
申请号：
US16462609
公开号：
US20190298187A1
申请日:
2017.11.28
申请国别(地区):
US
年份:
2019
代理人:
摘要：
A flow sensor comprises an electroactive material device. A driver controls the electroactive material device to deliver heat locally to the flowing medium for which the flow is to be sensed. Temperature sensing signals are obtained and these are used to derive a flow measurement. The way the heat is dissipated relates to the flow, and it is measurable based on the temperature sensing signals. The temperature sensing involves measuring an electrical characteristic which comprises an impedance or an impedance phase angle of the electroactive material device at at least a first frequency and at a second frequency different from the first frequency. The influences of temperature and pressure can in this way be decoupled so that the temperature can be measured at any pressure.
