Homodyne laser radar system for surface displacement monitoring

A Marine Radar Based Ocean Surface Feature Monitoring System

Today, marine radar-image sequences are used on an operational basis to measure ocean surface wave parameters [1] [2]. In addition, they have shown to be useful in measuring the evolution of individual waves in time and space [3] [4], current and bathymetry fields [5] [6] [7] as well as surface wind fields [8]. The typical marine radar systems used for these applications operate in the X-band a...

Laser monitoring of chest wall displacement.

We developed a prototype laser monitor, consisting of a single laser sensor, to observe chest wall displacement during respiration. With this monitor, respiratory waveforms are expressed as an anterioposterior motion of the chest wall. The purpose of this study was to examine the characteristics and performance of this prototype. Performance was assessed: 1) under static conditions; 2) using a ...

A Wireless Laser Displacement Sensor Node for Structural Health Monitoring

This study describes a wireless laser displacement sensor node that measures displacement as a representative damage index for structural health monitoring (SHM). The proposed measurement system consists of a laser displacement sensor (LDS) and a customized wireless sensor node. Wireless communication is enabled by a sensor node that consists of a sensor module, a code division multiple access ...

UWB Radar System for Breath Activity Monitoring

Wireless Laser Range Finder System for Vertical Displacement Monitoring of Mega-Trusses during Construction

As buildings become increasingly complex, construction monitoring using various sensors is urgently needed for both more systematic and accurate safety management and high-quality productivity in construction. In this study, a monitoring system that is composed of a laser displacement sensor (LDS) and a wireless sensor node was proposed and applied to an irregular building under construction. T...