Ultrasonic ranging has been widely used in automobiles, unmanned aerial vehicles (UAVs),
robots and other fields. With the appearance of micromachined ultrasonic transducers …

The importance of the continuous service of power transformers and their role in the
reliability of the power delivery has resulted in the need for various monitoring systems …

The acoustic emission (AE) technique is one of the most widely used in the field of structural
monitoring. Its popularity mainly stems from the fact that it belongs to the category of non …

Flood risk management usually hinges on accurate water level identification in urban
streams such as rivers or creeks. Although research has emphasised the applicability of …

A microwave dielectric sensor with defected ground structure including a Minkowski-like
fractal resonator is proposed for estimating the complex permittivity of ethanol-water …

Finger distance perception plays a crucial role in enabling humanoid intelligent robotic
systems to achieve smooth interaction with humans. Here, a rapidly response optical …

In the structural health monitoring field, the acoustic emission technique (AE) is one of the
most important and extensively applied methods. AE is a non-destructive testing (NDT) …

In the context of the increasing frequency of urban flooding disasters caused by extreme
weather, the accurate and timely identification and monitoring of urban flood risks have …

This paper presents two devices to detect the liquid dielectric characterization. The
differential method was used to enhance the robustness and reduce tolerance. A basic …

To achieve a reliable and accurate liquid-level detection, a differential pressure-based
instrument is proposed in this article. The phase-sensitive demodulation of the signal is …