Hole wall measuring method and hole wall measuring device

摘要

Problem to be solved: to provide a hole wall measuring method capable of suppressing dispersion of measurement data and measuring the inside diameter of the hole wall of the drilling hole with high accuracy.The present invention comprisesSuspended sensor housingBy an ultrasonic sensor provided in the sensor housingIn a hole wall measuring method for measuring a distance to the hole wall w of the drilling hole h at a measurement positionOn the periphery of the ultrasonic sensor provided in the sensor housingA cover member having an openingInstalling 120While lifting the sensor housing bodyThe ultrasonic sensor detects the distance to the hole wall W.Diagram