{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,20]],"date-time":"2025-11-20T12:11:52Z","timestamp":1763640712626},"reference-count":0,"publisher":"Cambridge University Press (CUP)","issue":"3","license":[{"start":{"date-parts":[[1997,5,1]],"date-time":"1997-05-01T00:00:00Z","timestamp":862444800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Robotica"],"published-print":{"date-parts":[[1997,5]]},"abstract":"<jats:p>This paper presents a novel approach for seam tracking using\nultrasonics. An ultrasonic seam tracking system has been developed for robotic\nwelding which tracks a seam that curves freely on a two-dimensional surface. The\nseam is detected by scanning the area ahead of the torch and monitoring the\namplitude of the waves received after reflection from the workpiece surface.\nScanning is accomplished by using two ultrasonic sensors (a transmitter and a\nreceiver) mounted on a stepper motor such that the transmitter angle is the same\nas the receiver angle. The motor is mounted on the end-effector just ahead of\nthe welding torch and covers a ninety degree arc in front of the torch. If there\nis no seam then the receiver receives most of the transmitted waves after\nreflection, but if there is a seam then most of the transmitted waves are\ndispersed in directions other than that of the receiver. The system has been\ntested and is very robust in the harsh environments generated by the arc welding\nprocess. The robustness of the system stems from using various schemes such as\ntime windowing, a waveguide, air and metal shields, and an intelligent sensor\nmanager. This ultrasonic system offers some distinct advantages over traditional\nsystems using vision and other sensing techniques. It can be used to weld very\nshiny surfaces, and is a very economical method in terms of cost as well as\ncomputational intensity. The system can be used to detect seams less than 0.5 mm\nwide and 0.5 mm deep.<\/jats:p>","DOI":"10.1017\/s0263574797000313","type":"journal-article","created":{"date-parts":[[2002,7,27]],"date-time":"2002-07-27T09:36:08Z","timestamp":1027762568000},"page":"275-281","source":"Crossref","is-referenced-by-count":54,"title":["Intelligent seam tracking using ultrasonic sensors for\nrobotic welding"],"prefix":"10.1017","volume":"15","author":[{"given":"Ajay","family":"Mahajan","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fernando","family":"Figueroa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[1997,5,1]]},"container-title":["Robotica"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0263574797000313","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,5,11]],"date-time":"2019-05-11T16:58:31Z","timestamp":1557593911000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0263574797000313\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1997,5]]},"references-count":0,"journal-issue":{"issue":"3","published-print":{"date-parts":[[1997,5]]}},"alternative-id":["S0263574797000313"],"URL":"https:\/\/doi.org\/10.1017\/s0263574797000313","relation":{},"ISSN":["0263-5747","1469-8668"],"issn-type":[{"value":"0263-5747","type":"print"},{"value":"1469-8668","type":"electronic"}],"subject":[],"published":{"date-parts":[[1997,5]]}}}