NEES @ UC San Diego

Acceleration/Displacement Sensors & GPS System

GPS ReceiversFull SizeGPS ReceiversFull SizeGPS SystemFull Size

A variety of sensors are available for use during testing at the NEES @ UCSD facility, which are detailed in the tables below. The signal conditioned accelerometers are packaged in a rugged aluminum housing ideal for outdoor testing, and have a dynamic range of ±2g to ±200g.

To measure displacement, the facility has a number of linear and spring potentiometers and a GPS data acquisition system. The GPS system uses RTD-NET software by Geodetics. A network of three NAVCOM ANT-2004T antennae (two mobile and one reference) provides dynamic displacement monitoring in three coordinates. The dedicated standalone computer allows continuous monitoring via three NAVCOM NCT2030M receivers operating at 50-Hz. Unobstructed views of the sky are necessary, so this system is ideal for monitoring global displacements at the top of a structure.

Sensor Model Manufacturer Quantity Full-Scale Typical Calibration Factor
Acceleration 4000A Silicon Mems Sensor Measurement Specialties 152 10G 0.200 V/G
Displacement MLS130/50 Linear Potentiometer Penny+Giles 59 50mm 0.02 V/mm/V
Displacement MLS130/100 Linear Potentiometer Penny+Giles 17 100mm 0.01 V/mm/V
Displacement MLS130/150 Linear Potentiometer Penny+Giles 11 150mm 0.0067 V/mm/V
Displacement MLS130/200 Linear Potentiometer Penny+Giles 8 200mm 0.005 V/mm/V
Displacement PT8101-0002-211-1110 String Potentiometer Celesco Transducer Products, Inc. 4 2in 0.5 V/in/V
Displacement PT8101-0005-211-1110 String Potentiometer Celesco Transducer Products, Inc. 34 5in 0.2 V/in/V
Displacement PT8101-0010-211-1110 String Potentiometer Celesco Transducer Products, Inc. 16 10in 0.1 V/in/V
Displacement PT8101-0020-211-1110 String Potentiometer Celesco Transducer Products, Inc. 28 20in 0.05 V/in/V
Displacement PT8101-0025-211-1110 String Potentiometer Celesco Transducer Products, Inc. 24 25in 0.04 V/in/V
Displacement PT8101-0030-211-1110 String Potentiometer Celesco Transducer Products, Inc. 25 30in 0.033 V/in/V
Displacement PT8101-0050-211-1110 String Potentiometer Celesco Transducer Products, Inc. 8 50in 0.02 V/in/V
Displacement WDS-300-P60-CR-P String Potentiometer Micro-Epsilon 12 300mm 0.0033 V/mm/V
Displacement 682-9610R3.4KL2.0 Linear Potentiometer BEI Technologies, Inc. 32 1in 1.0 V/in/V
GPS-Based Absolute Displacement RTD Family 250304 Geodetics, Inc. 3 N/A See Technical Spec

NEHRPNSFNEEScommNEESIAS Accredited

The Large High-Performance Outdoor Shake Table is supported in part by the George E. Brown, Jr. Network for Engineering Simulation (NEES) program of the National Science Foundation under Award Number CMMI-0927178.

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