Strain gauges are fixed on the two rails for measurement of vertical wheel loads. They are fixed on the neutral axis on the web of rails between sleeper cribs with full Wheatstone bridge configuration for each channel. 12 such circuits (channels) on each rail are used to detect the impact loads due to any portion of the defective wheel by covering two revolutions of each wheel on the instrumented (strain gauges) portion of the rails. A triggering switch is provided on the rail for triggering the system to begin data acquisition on arrival of the train over the instrumented rail. LabVIEW platform is used for data acquisition. Analysis of data is done through a code written in MATLAB software which is interfaced with LabVIEW.