Strain gauge basics in less than 1 minute (StrainSmart)
In this iNote Vijay from Dynatec India explains about the all in one stressed beam that is used to demonstrate the features of StrainSmart DAQ software, including the most popular four strain gage sensors types: Planar Rosette, Tee Rosette, Single Element, Temperature Sensor (RTD).
StrainSmart is a ready-to-use, Windows® based software system for acquiring, reducing, presenting, and storing measurement data from strain gages (strain gauges), strain-gage-based transducers, thermocouples, temperature sensors, LVDT's, potentiometers, piezoelectric sensors, and other commonly used transducers.
Strain gage planner rosette, produced using Micro-Measurements Advanced Sensors® technology. The C5K-06-S5198-350-33F offers 350Ω resistance in a miniature rectangular rosette strain gauge that comes precabled and ready to install. Advanced Sensors Technology : http://www.vishaypg.com/micro-measurements/press/2017/advanced-sensors-technology-strain-gages/en/
Tee rosette, bi-axial strain gage ( half-bridge) often referred to as poisson gages, are 90° tee rosette gages, aligned with the principal strains in uniaxial stress loading, for use in column load cells or simple cantilever applications. In column load cells, the gages are utilized to cancel bending strains and for cantilever beam applications, these sensors allow for gaging a single side of the spring element to reduce cost.
Single element uniaxial strain gage:
Resistance Temperature Detectors (RTD), such as the Micro-Measurements®TG-series, can achieve impressive temperature measurement accuracy (better than ±0.3°C). But, achieving these results requires exercising good practices. TG temperature sensors are installed with the same techniques and materials used for installation of wide-temperature range strain gage sensors. But unlike strain gages, TG-series temperature sensors should be installed at points of low strain magnitude on the test structure – as close to zero strain as practicable. This is to avoid strain-induced errors in the temperature measurement. At the same time, if data from the RTD is intended to correct strain gage thermal output, then the temperature sensor data must match the temperature excursion experienced by the strain gages. https://www.strainblog.com/content/minimizing-strain-induced-temperature-measurement-errors-when-using-bondable-rtds