Dr. Takuro Nishi Profile

Dr. Takuro Nishi

at Shimizu Corp

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 7 June 2024 Presentation + Paper

Vibration monitoring of tunnel faces applying 78GHz DBF-based high-speed imaging radar

H. Iwaki, T. Nishi, H. Tada

Proceedings Volume 13048, 130480H (2024) https://doi.org/10.1117/12.3013997

KEYWORDS: Radar, Vibration, High speed imaging, Radar sensor technology, Imaging systems, Radar signal processing, Phase unwrapping

Read Abstract +

To prevent accidents caused by collapse and rockfall tunnel faces during construction, we considered vibration monitoring using a millimeter-wave (78-GHz band) DBF-based high-speed imaging radar. Basic performance tests were conducted in a radio anechoic room and test facility simulating an actual tunnel. It was confirmed that the accuracy of the 0.1-mm displacement-measurement, high-speed sampling of 0.001 s, and individual movements of several targets could be distinguished. Based on the basic test results, on-site measurements were performed at an actual tunnel construction site. The displacement and vibration changes of a tunnel face at the time of breakthrough can be captured; in addition, large velocity changes occur in a working face before breakthrough, and it might be possible to detect an abnormal tunnel face in advance. In addition, it was confirmed that the movement of the rockfall location was almost precisely captured even for small-scale flaking during the drilling of the working face, regardless of the condition in which a part of the measurement range became shadowed.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years