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Micromachines 2012, 3(2), 325-330; doi:10.3390/mi3020325

Time of Flight Sensor with a Flow Parallel Wire

*  and
RWTH Aachen University, Konstruktion und Entwicklung von Mikrosystemen (KEmikro), Steinbachstraße 53 B, Aachen 52074, Germany
* Author to whom correspondence should be addressed.
Received: 5 March 2012 / Revised: 5 April 2012 / Accepted: 18 April 2012 / Published: 26 April 2012
(This article belongs to the Special Issue Micro Flow Controllers)
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A time of flight sensor has been equipped with a sensing wire parallel to the flow direction (flow parallel wire, FPW). A heat pulse is generated with a coil in the flow channel. The FPW has a center tap allowing its upstream and downstream parts to join in a half bridge. When a heat pulse passes the FPW, a large output peak is generated. The time between heat pulse generation and recording the peak maximum is only marginally affected by the properties of the fluid. With a combination of two FPWs, a measuring range of approximately 0.01–0.5 m/s can be achieved.
Keywords: time of flight sensor; flow parallel wire; fluid property insensitive time of flight sensor; flow parallel wire; fluid property insensitive
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Gerhardy, C.; Schomburg, W.K. Time of Flight Sensor with a Flow Parallel Wire. Micromachines 2012, 3, 325-330.

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