Study of the Range Expansion of the RZB Borehole Strain Meter
1 Institute of Crustal Dynamics,CEA, 1 Anningzhuang Road, Haidian District, Beijing 100085, China
Abstract To make the RZB borehole strain meter work normally under kilometer depth, a range extension mechanism was designed. Based on a ceramic motor and the RS485 bus, the mechanism can remotely make up for the deformation caused by water pressure and achieve the goal of the range extension. Some simulation experiments for up to 10 MPa pressure were performed in the laboratory, and the test results showed that: the sensor 1 was over range under the pressure of 5 MPa| after the range extension, the sensor 1 worked well under the pressure of 10 MPa.
Key words ：
borehole strain meter
kilometer deepth borehole
measuring range expansion
ceramic motor
Received: 11 June 2014
Published: 02 June 2015
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