Long range, high sensitivity, low noise capacitive sensor for tagless indoor human localization

Javed Iqbal, M. Lazarescu, Osama Bin Tariq, L. Lavagno
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引用次数: 15

Abstract

Capacitive sensors have important advantages and are widely used, but typically up to sensing distances comparable to sensor size. We present the design and experimental results of a self-contained long range capacitive sensor that is suitable for indoor human localization. We make differential measurements of the reactance effects of sensor plate capacitance using a constant excitation frequency, which is both less prone to noise and easier to filter. The experimental results show good sensor sensitivity up to 200 cm for a 16 cm square sensor plate, low noise and good measurement stability.
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远距离、高灵敏度、低噪声电容式传感器,用于无标签室内人体定位
电容式传感器具有重要的优势,并被广泛使用,但通常要达到与传感器尺寸相当的传感距离。本文介绍了一种适用于室内人体定位的自备式远距离电容式传感器的设计和实验结果。我们使用恒定的激励频率对传感器极板电容的电抗效应进行差分测量,这既不容易产生噪声,也更容易滤波。实验结果表明,在16厘米见方的传感器板上,传感器灵敏度可达200厘米,噪声低,测量稳定性好。
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