Developmennt of Ultrasonic Time-of-Flight Computed Tomography System for Inspection of Buildings with Caltural Values

2016 Fiscal Year Final Research Report

• Project/Area Number: 25242023
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Cultural assets study and museology
• Research Institution: Yamagata University
• Principal Investigator: Adachi Kazunari 山形大学, 大学院理工学研究科, 教授 (00212514)
• Co-Investigator(Kenkyū-buntansha): 渡辺 裕二 拓殖大学, 工学部, 教授 (30201239) ; 西脇 智哉 東北大学, 工学(系)研究科(研究院), 准教授 (60400529) ; 柳田 裕隆 山形大学, 理工学研究科, 准教授 (80323179)
• Project Period (FY): 2013-10-21 – 2017-03-31
• Keywords: 保存科学 / 文化財建造物 / 超音波音速ＣＴ

Outline of Final Research Achievements

In this research project, we have accomplished the development of a portable and easy-to-handle ultrasonic time-of-flight (TOF) computed tomography (CT) system which can practically visualize anomaly parts inside the structural members of buildings with cultural values for on-site structural inspection of them. The followings are the specific achievements: ①The methods for desiging and manufacturing small high-power sound sources, which can emit sharp and intense ultrasonic pulses into the object to be inspected with any sound
properties, have been concretely estabilshed. ②The image reconstruction technique, in which ultrasound wave propagation is taken into account, has been devised. ③Mechanically robust and light-weight TOF-CT instruments have been developed, and ④on-site automatic TOF measurement system has been realized in order to make the inspection works easy. However we have not accomplished integration of the newlydeveloped sound sources into the system and on-site imaging.

Free Research Field

超音波工学