31. Huang et al . refined this method later in 2005 by making use of strain gauges . 32. Load cell assemblies can be bolted, clamped or strain gauges might be glued directly to rail. 33. The critical load and strain gauge measurements at the load are noted and a graph is plotted. 34. The input stress can be easily measured via strain gauge measurement of the input pinion bearing housing. 35. The rock slices were measured with delicate foil strain gauges which could measure minute changes in size. 36. I have always assumed that is why the insurance paperwork refers to it as a strain gauge . 37. In 1938, Simmons invented the strain gauge . 38. He invented the strain gauge in April 1938, while investigating the effects of earthquakes on water towers. 39. The preparation of the surface where the strain gauge is to be glued is of the utmost importance. 40. Later, piezoelectric strain gauges were used.
