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Published November 2011 | public
Journal Article

Novel compact tiltmeter for ocean bottom and other frontier observations

Abstract

Long-term observations conducted with large arrays of tiltmeters deployed in ocean-bottom boreholes, on the seafloor and in other hazardous regions are expected to provide rich information useful in geosciences, social engineering, resource monitoring and other applications. To facilitate such observations, we designed and built a compact, highly sensitive tiltmeter with sufficient performance, comparable to that of much larger instruments that are difficult to operate in the target locations. The new tiltmeter is suitable for observations requiring multiple instruments because its design is optimized for low-cost mass production. This paper describes its key technologies, including a very compact folded pendulum and an optical fiber readout. Preliminary results of test observations conducted using a prototype tiltmeter are compared with a conventional water-tube tiltmeter.

Additional Information

© 2011 Institute of Physics Publishing Ltd. Received 21 February 2011, in final form 17 June 2011. Published 13 September 2011. This work was partially supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Young Scientists (B) 16740251. It is also partially supported by the director's discretion fund of the ERI, University of Tokyo (2006 and 2008).

Additional details

Created:
August 19, 2023
Modified:
October 24, 2023