Ultrasonic Signal-Transmission Techniques for Compact Microtunneling Systems
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- HONJO Katsuhiko
- NTT KANTO Plant Engineering and Technology Support Center
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- HOSHIYA Kunio
- NTT Integrated Information & Energy Systems Laboratories
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- NAKANO Sadahiko
- NTT Integrated Information & Energy Systems Laboratories
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- KUWANO Hiroki
- NTT Integrated Information & Energy Systems Laboratories
Bibliographic Information
- Other Title
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- Ultrasonic Signal-Transmission Techniqu
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Abstract
This paper describes ultrasonic transmission techniques for sensor signals transmitted through water-filled pilot pipes for underground microtunneling systems. Underwater ultrasonic waves are expected to be used for transmitting the orientation and location signals of a remote controlled machine. We have investigated the relationship between ultrasonic transmission loss and frequency for propagation distance in water-filled pipes. Digital signals can be transmitted at 100 bps for more than 50m distance in 80-mm-diameter steel pipes by using underwater ultrasonic pulse waves over 300kHz. A compact prototype ultrasonic transmitter and receiver are developed, making it possible to transmit and receive digital signals by processing their signal waveforms through flowing water in the pilot pipes. Field trials indicate a range of signal transmission of pitching angle over 40-m distance for an actual compact microtunneling system.
Journal
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- IEEJ Transactions on Sensors and Micromachines
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IEEJ Transactions on Sensors and Micromachines 117 (9), 456-464, 1997
The Institute of Electrical Engineers of Japan
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Details 詳細情報について
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- CRID
- 1390282679438255488
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- NII Article ID
- 10004832506
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- NII Book ID
- AN1052634X
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- ISSN
- 13475525
- 13418939
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- NDL BIB ID
- 4275514
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed