Koichi Kameoka

A method for estimating axle weights of in-motion vehicles and its evaluation

A new method to improve the accuracy of measured axle weight of an in-motion vehicle is proposed and evaluated by application to simulated data composed of a known axle weight and, as a dynamic component, the measured accelerations of an actual vehicle body. From the results, the efficiency of the method is confirmed.

Natural frequency of the beam-type loadcell scale with a scale-pan. (Effect of the rigidity of scale-pan and the location of load)

The effect is discussed of the rigidity of a scale-pan and the location of load on the natural frequency of a beam-type loadcell scale. First, the modeling procedure is described. The dynamic model can be constructed by combining two vibration models : one is a five-degrees-of-freedom model concerning a part of the scale without the scale-pan, and the other a model concerning the scale-pan itself which is described by applying the equation of bending vibration of an elastic plate. Second, the natural frequencies, f1, f2, f3, which are calculated using the proposed dynamic model are compared with those obtained by experiment. Through this comparison, the adequacy of the proposed model is verified. Consequently, the dependence of f1, f2, f3 on the rigidity of the scale-pan and the location of load is made clear.