Step running type robot null for pipe conduit exterior checkPURPOSE: To obtain a traveling robot for inspection of outside of duct which is small and light and excellent in economical property and efficiency.NAGAOKA ETSUO永岡 悦雄MAEKAWA TSUNEO...
exterior wall surface of a receiver 15 and launcher 14 of a conduit pipe 11, and the vibration based upon the passing sound (striking sound) generated when a pig 10 passes the welding line M in the conduit pipe 11 is picked up and amplified so that it can be heard through speakers 18...