An ultrasonic omni-directional sensor device for coverage structural deformation monitoring

Abstract

Underground space has to be monitored for regional coverage deformations. This issue remains a challenge for current deformation monitoring techniques. In this study, a new high-coverage regional monitoring method is presented to address underground space deformation by using the divergent feature of an ultrasonic sensor. The working principle for coverage regional monitoring, which uses the divergence feature of an ultrasonic beam to increase the monitoring area coverage, is proposed. Space and mathematical models for the ultrasonic beam are also established. An ultrasonic spherical sensor device is designed to achieve all-round monitoring of underground deformation. A longitude–latitude color map histogram is proposed, which enables automatic detection and tracking of omni-directional structural deformation. The new method is illustrated via experiments to determine its validity for deformation monitoring.

A BHR Composite Network-Based Visualization Method for Deformation Risk Level of Underground Space

“…A spatial 3D coordinate system is established, as shown in Fig 1(a) . The ultrasonic spherical sensor array is used as a benchmark of spatial measurement to detect random structural deformation in underground space [ 26 ]. The designed device is shown in Fig 1(b) .…”

A propagating mode extraction algorithm for microwave waveguide using variational mode decomposition

“…NDT&E methods are required to be low-cost, fast detection, noncontact, anti-interference, and high-accuracy. There are now many well-established NDT&E solutions such as optical method [2,3], radiography [4,5], ultrasonic [6,7], penetrant testing [8], acoustic emission [9], magnetic flux leakage [10], metal magnetic memory [11], electromagnetic method [12], and pulse eddy current and thermography-based NDT [13,14].…”