Determination of Main Bearing Dynamic Clearance in a Shield Tunneling Machine Through a Broadband PMUT Array with a Decreased Blind Area and High Accuracy

Determination of Main Bearing Dynamic Clearance in a Shield Tunneling Machine Through a Broadband PMUT Array with a Decreased Blind Area and High Accuracy

Traditional PMUT ultrasonic ranging systems usually possess a large measurement blind area under the integrated transmit–receive mode, dramatically limiting its distance measurement in confined spaces, such as when determining the clearance of large bearing components. Here, a broadband PMUT rangefi...

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Bibliographic Details
Main Authors: Guoxi Luo, Haoyu Zhang, Delai Liu, Wenyan Li, Min Li, Zhikang Li, Lin Sun, Ping Yang, Ryutaro Maeda, Libo Zhao
Format: Article
Language:English
Published: MDPI AG 2025-07-01
Series:Sensors
Subjects:
ultrasonic rangefinder
PMUTs
broadening of bandwidth
small blind area
monitoring of axial clearance
tunneling machine
Online Access:https://www.mdpi.com/1424-8220/25/13/4182
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