| 摘要 |
<p>PURPOSE: To provide a method for measuring and indicating a shape of a wall of an excavated groove that enables automatic calculation of an excavation accuracy and quick forming of the record of the excavation accuracy when measuring an inner section of the wall of the excavated groove by means of a groove wall measuring device. CONSTITUTION: A sensor 1 of a groove wall measuring device is lowered into an excavated groove 2 and a preparation operation wherein upper and lower limit values in data to be adopted are determined from a distribution of all of the data obtained by the sensor 1, is executed. After that, measuring is started, then a median is selected from the plurality of pieces of data obtained by the sensor 1 by each prescribed range of depth, a calculated excavation accuracy is indicated on a screen and the data is preserved.</p> |
