Development of a machine integrated strain-based contact force sensor for pad foot soil compactors

摘要: Abstract An investigation was undertaken to explore the use of measurable pad strains on a non-vibratory foot roller provide real time continuous evidence compaction and contact force. Individual pads were instrumented with strain gages in pattern chosen based finite element analysis (FEA). Different pad–soil stress distributions modeled simulate range soil conditions. The FEA revealed that distribution has significant influence observed field, suggesting specific interpretation order determine Results from uniaxial laboratory testing loading dry sand verified FEA, i.e., experimental generally matched within 15% strains. measured using tactile pressure sensors found be moderately parabolic. A empirical calibration factor relating vertical sidewall force determined. Field performed multiple installed Caterpillar CP56 roller. Pad magnitudes increased up 250% during repeated passes Using factor, estimated shown increase compaction, represented by independently-measured unit weight.