A Low-Cost Flexible Hot-Film Sensor System for Flow Sensing and its Application to Aircraft

This paper reports a simple, low-cost preparation method for fabricating a thin hot-film flow sensing system directly on a flexible polyimide Printed Circuit Board (PCB) by incorporating printed circuit technique with micromachining process. The sensor system takes merits of simple structure, low cost, easy fabrication and packaging, integrating sensors with processing circuits, good mechanical property and sensing capability. The paper also demonstrates a novel application of the sensor system to a micro aerial vehicle (MAV). The wing tunnel experiments are conducted to validate the effectiveness of the sensors and the MAV.