Movement status sensor for vertical earthquake profile logging instrument
Title：
Movement status sensor for vertical earthquake profile logging instrument
Application Number：
 200410047918
Application Date：
 2004/06/11
Announcement Date：
 2005/02/23
Pub. Date：
Publication Number：
 1584630
Announcement Number：
 1228647
Grant Date：
 2005-11-23
Granted Pub. Date：
 2005-11-23
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G01V 1/40
Applicant(s)：
 Tsinghua Univ.
Inventor(s)：
 Gao Dewen, Liao Yanbiao
Key Words：
 Movement status sensor, vertical, earthquake profile, logging instrument
Abstract：
 A transducer consists of shell formed by topcover with centre hole, bottomcover and sidewall; hollow suspension column inserted in centre hole; magnetic force approach switch set in shell; heavy object being able to slide up and down and electric interface. The topcover, bottomcover and sidewall are prepared from high temperature and high pressure resistance material.
Claim：
Priority：
PCT：
LegalStatus：

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