Computerized Display For Seismometers

Discussion in 'General Electronics Chat' started by Glenn Holland, Oct 4, 2016.

  1. Glenn Holland

    Thread Starter Member

    Dec 26, 2014
    I have a three axis seismometer station and I want to display the ground motion from earthquakes on a computer monitor.

    The existing system has an op-amp and filter for each seismometer (for detecting ground motion in the Vertical, North-South, and East-West directions) and an FM telemetry system that connects the station to a recorder via a phone line as shown in that attached diagram.

    I'm looking for a way to convert the analog signals (+ and - 5 volts that now go to the recorder) to digital and display the traces similar to an old fashioned seismograph recorder.

    The manufacturer of the existing system (Teledyne GeoTech) has a commercially available upgrade, however it is very expensive and I'm looking for a home made solution.
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
    If the signals are in the -5V to +5V range then you can use opamps to scale and offset them into a 0V to +5V range which the multi-channel A/D converter in almost any modern MCU can handle.