DEVELOPMENT OF ULTRASHORT BASELINE EXTENSOMETER
Li Jiaming 1,2,3) ；Yao Zhigui 1,2) ；Zhang Weihua 1,2) ； and Mei Jianchang 1,2)
1) Institute of Seismology,CEA,Wuhan 4300712)Crustal Movement Laboratory,Wuhan 4300713)Wuhan Base of Institute of Crustal Dynamics,CEA,Wuhan 430071
Abstract The design idea, the overall structure and the principle of operation of main components of extensometer of USBE1type and the test at stations are introduced. Test results show that thanks to the development of a sealing structure of highprecision capacitance sensor for microdisplacement the length of instrument baseline can be shortened greatly for example,to not more than 1 m and it can record the clear response to the solid tides, so can meet the small space and requirement for earthquake emergency.
Key words ：
extensometer
USBL
capacitance sensor
earth tide
seismic monitoring
Received: 01 January 1900
Corresponding Authors:
Li Jiaming
Cite this article:
Li Jiaming,Yao Zhigui,Zhang Weihua et al. DEVELOPMENT OF ULTRASHORT BASELINE EXTENSOMETER[J]. , 2009, 29(4): 144-147.
Li Jiaming,Yao Zhigui,Zhang Weihua et al. DEVELOPMENT OF ULTRASHORT BASELINE EXTENSOMETER[J]. jgg, 2009, 29(4): 144-147.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2009/V29/I4/144
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