ランダムドットを組み合わせたマルチスリットの投光による配管の計測

―マルチスリットの配列を利用した管の中心線と径の算出―

抄録

This paper describes the measurement method of piping using multiple laser slits. Measurement due to replacement or construction of new pipes is cumbersome work on the renewal of facilities in a chemical plant. Recently, three dimensional measurement systems with a laser scanner are widely used for piping measurements. However, the size of data obtained is very large since the data includes unnecessary information such as background data etc. Extra works are required to extract the appropriate information from the enormous data. In order to address this problem, we have developed a three-dimensional piping measurement system using multiple laser slits with random-dot projector. Using this system, just minimum data to specify a pipe, such as orientation and diameter of the pipe, are extracted effectively. Random dots are used to identify each slit. The arrangement state of multiple slits in the image are used to estimate the direction of the pipe. Once the direction of the pipe is determined, the data on each slits are arranged to be vertical along the centerline. The arranged data are used to estimate the cross-sectional shape. As the result, the pipe specifications are estimated effectively utilizing multiples laser slits.