Conventional Observation System for a Crustal Movement

Abstract

In observing crustal deformations, strain and tilt data are usually recorded in a continuous manner with a telemetry system using leased lines. However, this system is often disrupted by such troubles as interruptions in the power supply and problems with the leased line. In order to alleviate these problems, an automated measuring system has been designed. The system consists of a microcomputer containing a newly designed interface circuit and a panel meter for analog-to-digital (AID) conversion. The system operates with low power consumption and supports a long-term continuous observation utilizing only a car battery. The system is inexpensive, easy to handle. The data recorded by the system agrees well with that by the telemetry system, and the former is reliable not only for use of tidal analysis but also for use over long periods.