Strain gauge || what is strain gauge ? || Working principle of strain gauge || Example-types of strain gauge
what is strain gauge ? A string gauge is a sensor which whose resistance varies with applied force.it converts force, pressure, tension weight e.t.c in to a Electrical resistance which can then be measured like pizo resistive transducer. Working principle of strain gauge : As we applied forced to extend the length of gauge it's cross section area must reduce becouse volume of material remain constant. Then strain gauge is connected to a balanced whiston bridge but as force is applied on gauge resistance change and bridge becomes unbalanced producing V0 Gauge factor Gf=1+2Y Y= paison ratio Using gauge factor we determined change in resistance to the modify resistance and then using Wheaton bridge V0 Examples : Gauge factor in semiconductor is 120 Gauge factor in Ni=12 Gauge factor in co=4.9 Gauge factor in pt=5.2 C=10 types of strain gauge 1. Straight strain checks. 2. Layer Rosette strain checks....
Good
ReplyDelete