抄録
This paper describes on the estimation method of compressed strength for the concrete construction such as highway roads, large bridges and institution, and the autonomous mobile robot with that the small sized perforation drill. In the control using the torque motor, the feed rate of drill is expected to be a constant as the torque depending on load. However, the forwarding speed was found to change for concrete strength and to be the approximately constant to concrete strength when the load with more than of setting torque acted on a drill. As a result, the comparison of the concrete strength and drill feed rate was able to express by logarithm approximation curve. Installing this inspection system on a mobile robot, we got the possibility that automatic estimation of concrete strength was carried out easily at construction site.
