What Is Strain Gauges

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Report on Strain Gauges Teh Kai Sheng, S10166615A Content Page 1. Introduction of Strain Gauges 2. How Strain Gauge works 3. Gauge Factor 4. Applications of Strain Gauges 5. How strain gauges attached to objects 6. Factors affecting accuracy of strain gauges • Lead-wire effects • Thermal Effects Introduction to Strain Gauges A strain gauge is a long length of conductor arranged in a zigzag pattern on a membrane. A strain gage’s electrical resistance varies in proportion to the amount of strain in the device, therefore measuring the strain in the device. Image source: http://www.ni.com/cms/images/devzone/tut/Strain_Gauge_Diagram2.png What is Gauge Factor? A fundamental parameter of the strain gage is its sensitivity …show more content…

Thermal effects on strain measurement a strain gage’s resistivity and sensitivity also change with temperature, which leads to measurement errors. Strain gage manufacturers attempt to minimize sensitivity to temperature by processing the gage material to compensate for the thermal expansion of the specimen material for which the gage is intended. These temperature-compensated bridge configurations are more immune to temperature effects. Also consider using a configuration type that helps compensate for the effects of temperature fluctuations. Resistance change with changes in temperature Strain gage manufacturers attempt to minimize sensitivity to temperature by processing the gage material to compensate for the thermal expansion of the specimen material for which the gage is intended. While compensated gages reduce the thermal sensitivity, they do not totally remove it. A residual error on the order of 10 me/°C is still possible when you use a temperature compensating gage. Therefore, additional temperature compensation is sometimes necessary. Give at least 5 examples of applications of strain gauges. 1. Bridge Strain Gauges sensors are put on various parts of the bridge to measure the stress exerted on it. If there are abnormal readings from the sensors, it can be easily located on the

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