DEVICE FOR MEASURING CUTTING DEPTH FOR ROAD SURFACE CUTTING MACHINE

PURPOSE:To make safe and accurate measurement of cutting depth available by applying computer processing to detected values that are detected by a turn angle sensor installed to a cutter drum and by a force sensor jointly installed to one of cutter bits that are provided to the cutter drum. CONSTITUTION:A plurality of cutter bits 2 are provided to the peripheral surface of a cutter drum 1 that is suspended from the belly of a body 31 of a road surface cutting machine. A turn angle sensor made from a potentiometer 12 or the like is installed to the cutter drum 1 for detecting the turn angle of the cutter drum 1. At least one of the cutter bits 2 is made to the bit doubling as a sensor bit 3, and a force sensor such as a load cell is jointly installed thereto for detecting variation of force acting on the bit 3. The detected values are then sent to a circuit member for computer processing, where necessary computerization is applied to the values and cutting depth is determined thereby. By such method, accurate measurement can be available to determine the cutting depth without being affected by ruggedness of the road, flection of wheels, vibration of the cutting machine body and the like.