| 摘要 |
PURPOSE:To detect the quality of a boring state automatically and precisely by photographing the image of a boring part through optical fiber, converting it into an image signal and inputting it into a judging unit to detect breaking damage of a drill. CONSTITUTION:When boring is completed, a drill 1 ascends, and a timing signal ST is output to an operation control unit 12 from a NC unit 17. An ITV camera 8 photographs the state of a hole 2 illuminated by a lamp L through optical fiber F, and an image signal SI is input to a breaking damage judging unit 6. This signal SI is housed into an image memory 11 as a digital signal SD. And, the operation control unit 12 converts housed data into binary values by means of a threshold value VT, regards the hole 2 as logic 1, a surrounding area 18 as logic 0, and counts the logic 1 to be compared with a set value NT. If the counted value is above NT, the value is judged as normal, and if the value is below NT, a stop signal SM is output by judging presence of breaking damage. Quality detection of a boring state can be automated and be made to be highly accurate by this constitution. |
