Data Collection

GCM and GST Modules for

Distributed Monitoring of Infrastructure


GCM4 Controller. 1GHz Performance.

Each monitoring system assembled by Geodaq uses the GCM4 controller module to communicate with all networked sensors and the host computer. The GCM4 runs at 1GHz and has 4 GB of solid state memory with Ethernet, RS-232 and USB communication links. Our GCM4 modules are pre-programmed and ready to perform any remote or real-time monitoring task your project requires.

» Download Datasheet

Generic placeholder image

GST5 Module. High Speed 24-bit.

The GST5 module acquires static or dynamic readings from a wide variety of sensor types. Connect multiple GST5 modules using a single cable. Benefits of a distributed monitoring system include: increase signal quality, eliminate noise over long sensor cables, increase operational reliability, reduce cable and conduit costs, and simplify field installation.

» Download Datasheet

Generic placeholder image

Excavation Support Monitoring

Instrumentation includes one 76 foot long inclinometer mounted inside the excavation wall and 60 vibrating wire strain gauges welded to steel pipe struts. The GCM4 is instructed remotely to obtain samples every 5 minutes while struts are loaded. Once struts are loaded, the sample interval is changed to 30 minutes. Because commands are sent remotely, no site visit is needed to control how sampling is accomplished. Power is provided by a 35 Amp-Hour battery with a 12 watt solar panel. Results are available on a smartphone or computer.

Pile Testing

Instrumentation includes one load cell, two displacement transducers, and 8 strain gauges embedded in the test pile at different locations. The GCM4 is instructed to take samples of all sensors every 2 seconds while loads are applied to the pile. During hold periods the sample interval is changed to every 30 seconds. For this real-time application, the GCM4 is always on and results are continuously updated to your smartphone or office computer. Test results can be monitored from multiple locations at the same time, and readings from 24-hour hold periods can be monitored from home or office. Power is provided by AC source with an uninterrupted power supply.

Remote Pipeline Monitoring

Instrumentation includes one 34 foot long in-place inclinometer, one piezometer, 18 strain gauge sensors mounted to the pipeline at 6 locations, 2 displacement transducers, and one rain gauge. The GCM4 is instructed to sample all sensors every 12 hours and transmit readings to a server computer via satellite modem. Power is derived from a battery with no solar panels. Results are presented in real-time on any smartphone or any computer. When any reading exceeds a threshold value, emails are delivered to project team members with notification of results.

Remote Vibration Monitoring

Instrumentation at each station includes 4 accelerometers, 2 tilt sensors, 2 displacement transducers and 8 strain gauges. The GCM4 is instructed to obtain readings from all sensors at 400 samples per second for 60 seconds using GST5 modules. Each GST5 module is located 50 feet from the base station where the GCM4 is located. Power is provided by a 55 Amp-Hour battery with an 18 watt solar panel. Peak values, signal frequencies and time histories for each sensor are viewable in real-time on a smartphone or computer.