Takuya KOIKE
Possibility of the Simple Measurement of Road Surface Pavement Condition Using a Smart Phone Application
Kazushi SANO, Hiroaki NISHIUCHI
In recent years, the real extension and paving rate of Japan's general road is on the rise, the number of accidents has increased. Therefore, in order to grasp the road pavement condition, using a smart phone app ¡ÈBumpRecorder¡É. Running speed in this study, installation location of the terminal, the type of tire, three were analyzed, they are intended to clarify the influence of the measured value. In addition, in order to grasp the road surface paving state because you need the true value of the step, we propose a method for correcting the measurement error to the true value. First, the running speed was measured by the four patterns of 40,45,50,55km/h. From the measurement results, the running speed and the step measurement value was found that there is a proportional relationship. Here, we propose a compensation method for errors due to running speed was observed. As a result of measurement in a variety of running speed, running speed 40km/h was able to measure the true value of steps. Thus, it was corrected by replacing the step measurement value to the traveling speed 40km/h. Next, set up a mobile terminal left on the dashboard, center, on the right side, examined the impact of the terminal installation position. As a result, the center of the terminal that is farthest from the tire could not accurately grasp the road surface condition. Further, it was found that it is possible to measure the right and left either precisely level information if tire. Finally, examining the effect of change of tire. Comparing the number of measurement data of step of less than 3cm of both tire the studless tire is low. Therefore step information can't be measured by the studless tire. Therefore the driving speed and a step measured value have a relation of proportion. I found out that correction to the step true value is possible to change for driving speed 40km/h. Installation position of the terminal is capable of measuring well on the tire accuracy, types of tires were found to be normal tire is desirable.
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