Input and monitoring of geotechnical data

To feed real-time geotechnical measurements into the system make use of the following moduletypes:

• The Data Logger module obtains the measurements from the connected geotechnical sensors and stores the data. Multiple instances of the Data Logger module, representing multiple physical data loggers, may be inserted into Trimble 4D Control Server, each with their own set of geotechnical sensors.
• The Data Logger IPI module is a tool for connecting to a data logger and importing In-Place Inclinometer (IPI) measurement data, extracting them from the data file, and passing them on to the monitoring database. If the data file does not contain cumulative displacements, the module calculates them from tilt values.
• The Accelerometer Manager module is used for receiving and decoding REFTEK accelerometer data streams and for calculating the peak acceleration from the data.
• The In-Place Inclinometer module takes the inclinometer data and computes from the sum of individual lateral offsets a total deflection value.

Pre-requisites

• Connected hard- and software:
  It is a pre-requisite of this system that a data logger be connected to the geotechnical sensors and that the data logger be configured to capture the data from the sensors at scheduled intervals and to write that data to a column-separated ASCII file. This ASCII file must be available to the Data Logger module.
• Time zone setting:
  The Data Logger module automatically reads in the data from the data file which provides no information on the time zone in which times are collected. Trimble 4D Control Server assumes the time to be UTC. Therefore, it is necessary to set the clock of the data logger to UTC.