Abstract:The mainframe of RZB borehole strainmeters has been upgraded, incorporating the core functions of original RZB borehole strainmeters and the merits of other premonition instruments, while retaining its excellent advantageous functions. The upgrades include: capabilities of responding to wide-band signals in RZB multi-component (sampling rate in second level); stabilization and continuities provided and guaranteed by an embedded low-power dissipation, high-stability and high-speed ARM920T kernel, together with customized WinCE; a touch screen on network board facilitating on-site configuration and maintenance; reinforced lightning-proof power supply and charging auto-adapt with DC/AC switching. The software has also been enhanced, with capabilities of remote upgrades and logging (detailed logs are provided for data tracking, exploring and future analysis). Using the new instrument, data analysis finds that the continuous rate has increased substantially, and the minute details of the sample is less than the recorded seismic response process.