This work presents the development and evaluation of a fully printed multi-directional thermal flow sensor on PET substrate. The device consists of conductive Ag tracks and printed thermistors based on BaTiO 3 , activated carbon and a solvent based thermoset polymeric system. Each element presents similar temperature—electrical resistance behavior (in terms of normalized values), thus enabling utilization as sensing and active elements for thermal two-dimensional flow sensing. A custom experimental setup was used for evaluating the device under two modes of operation, namely constant current and constant resistance. It was observed that in the range of 0 to 25 standard liters per second (SLPM) of air flow, constant resistance provided better input dynamic range than constant current (2.75 and 0.12 mW respectively), while constant resistance mode exhibited a sensitivity of approximately two orders of magnitude greater than that of constant current mode. For constant resi...

中文翻译：

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全印制的柔性多方向热流传感器

这项工作介绍了在PET基板上完全印刷的多方向热流传感器的开发和评估。该设备由导电的Ag迹线和基于BaTiO 3的印刷热敏电阻，活性炭以及基于溶剂的热固性聚合物系统组成。每个元素都表现出相似的温度-电阻行为（以归一化值表示），因此可以用作热二维流量传感的传感和有源元件。使用定制的实验设置在两种工作模式下评估器件，即恒定电流和恒定电阻。据观察，在每秒0至25标准升（SLPM）的气流范围内，恒定电阻提供的输入动态范围要比恒定电流更好（分别为2.75和0.12 mW），恒定电阻模式的灵敏度比恒定电流模式高大约两个数量级。为了保持稳定...