{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,19]],"date-time":"2026-05-19T13:59:12Z","timestamp":1779199152977,"version":"3.51.4"},"reference-count":40,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2017,11,29]],"date-time":"2017-11-29T00:00:00Z","timestamp":1511913600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000266","name":"EPSRC","doi-asserted-by":"publisher","award":["1657711"],"award-info":[{"award-number":["1657711"]}],"id":[{"id":"10.13039\/501100000266","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Robotics"],"abstract":"<jats:p>The field of in-pipe robotics covers a vast and varied number of approaches to the inspection of pipelines with robots specialising in pipes ranging anywhere from 10 mm to 1200 mm in diameter. Many of these developed systems focus on overcoming in-pipe obstacles such as T-sections and elbows, as a result important aspects of exploration are treated as sub-systems, namely shape adaptability. One of the most prevalent methods of hybridised locomotion today is wall-pressing; generating traction using the encompassing pipe walls. A review of wall-pressing systems has been performed, covering the different approaches taken since their introduction. The advantages and disadvantages of these systems is discussed as well as their effectiveness in the inspection of networks with highly varying pipe diameters. When compared to unconventional in-pipe robotic techniques, traditional full-bore wall-pressing robots were found to be at a disadvantage.<\/jats:p>","DOI":"10.3390\/robotics6040036","type":"journal-article","created":{"date-parts":[[2017,11,30]],"date-time":"2017-11-30T03:15:15Z","timestamp":1512011715000},"page":"36","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":54,"title":["Advances in the Inspection of Unpiggable Pipelines"],"prefix":"10.3390","volume":"6","author":[{"given":"George","family":"Mills","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Andrew","family":"Jackson","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Robert","family":"Richardson","sequence":"additional","affiliation":[{"name":"School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2017,11,29]]},"reference":[{"key":"ref_1","unstructured":"Central Intelligence Agency (2017, June 18). Pipelines, Available online: https:\/\/www.cia.gov\/library\/publications\/the-world-factbook\/fields\/2117.html."},{"key":"ref_2","unstructured":"National Grid 2017 (2017, June 14). Project GRAID. Available online: http:\/\/projectgraid.com\/."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Kwon, Y.-S., Lee, B., Whang, I.-C., Kim, W.-K., and Yi, B.-J. (2011, January 9\u201313). A Flat Pipeline Inspection Robot with Two Wheel Chains. Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), Shanghai, China.","DOI":"10.1109\/ICRA.2011.5979712"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"217","DOI":"10.1002\/rob.20330","article-title":"Visual and Nondestructive Evaluation Inspection of Live Gas Mains Using the Explorer Family of Pipe Robots","volume":"27","author":"Schempf","year":"2010","journal-title":"J. Field Robot."},{"key":"ref_5","unstructured":"Hertzberg, J., and Kirchner, F. (1996, January 9\u201311). Landmark-based autonomous navigation in sewerage pipes. Proceedings of the First Euromicro Workshop on Advanced Mobile Robot, Kaiserslautern, Germany."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"781","DOI":"10.1109\/TRO.2005.852258","article-title":"Dynamic Characterisitics of a Novel Self-Drive Pipeline PIG","volume":"21","author":"Hu","year":"2005","journal-title":"Trans. Robot."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"573","DOI":"10.1109\/JRA.1987.1087149","article-title":"MOGRER: A Vehicle Study and Realization for In-Pipe Inspection Tasks","volume":"3","author":"Okada","year":"1987","journal-title":"J. Robot. Autom."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"60","DOI":"10.1177\/027836498700600406","article-title":"A Three-Wheeled Self-Adjusting Vehicle in a Pipe, FERRET-1","volume":"6","author":"Okada","year":"1987","journal-title":"Int. J. Robot. Res."},{"key":"ref_9","unstructured":"Yang, S.U., Kim, H.M., Suh, J.S., Choi, Y.S., Mun, H.M., Park, C.M., Moon, H., and Choi, H.R. (2014, January 14\u201318). Novel Robot Mechanism Capable of 3D Differential Driving Inside Pipelines. Proceedings of the IEEE International Conference on Intelligent Robots and Syst00ems, Chicago, IL, USA."},{"key":"ref_10","doi-asserted-by":"crossref","unstructured":"Li, P., Ma, S., Li, B., and Wang, Y. (2008, January 22\u201326). Multifunctional Mobile Units with a Same Platform for In-Pipe Inspection Robots. Proceedings of the IEEE\/RSJ International Conference on Intelligent Robots and Systems, Nice, France.","DOI":"10.1109\/IROS.2008.4650583"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"52","DOI":"10.1016\/j.mechmachtheory.2012.05.004","article-title":"Novel Mechanisms and Simple Locomotion Strategies for an In-Pipe Robot that can Inspect Various Pipe Types","volume":"56","author":"Lee","year":"2012","journal-title":"Mech. Mach. Theory"},{"key":"ref_12","unstructured":"Kawaguchi, Y., Yoshida, I., Kikuta, T., and Yamada, Y. (1995, January 21\u201327). Internal Pipe Inspection Robto. Proceedings of the IEEE International Conference on Robotics and Automation, Nagoya, Japan."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"453","DOI":"10.1002\/rob.20296","article-title":"MagneBike: A Magnetic Wheeled Robot with High Mobility for Inspecting Complex-Shaped Structures","volume":"26","author":"Tache","year":"2009","journal-title":"J. Field Robot."},{"key":"ref_14","unstructured":"Fischer, W., Caprari, G., Siegwart, R., and Moser, R. (2010, January 7\u20139). Very Compact Climbing Robot rolling on Magnetic Hexagonal Cam-Discs, with High Mobility on Obstacles but Minimal Mechanical Complexity. Proceedings of the IEEE 6th German Conference on Robotics, Munich, Germany."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"997","DOI":"10.1016\/j.robot.2013.05.005","article-title":"OmniClimbers: Omni-directional Magnetic Wheeled Climbing Robots for Inspection of Ferromagnetic Structures","volume":"61","author":"Tavakoli","year":"2013","journal-title":"Robot. Auton. Syst."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Nassiraei, A.A.F., Kawamura, Y., Ahrary, A., Mikuriya, Y., and Ishii, K. (2007, January 10\u201314). Concept and Design of A Fully Autonomous Sewer Pipe Inspection Mobile Robot \u201cKANTARO\u201d. Proceedings of the IEEE International Conference on Robotics and Automation, Roma, Italy.","DOI":"10.1109\/ROBOT.2007.363777"},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Kim, J.-H., Sharma, G., and Iyengar, S.S. (2010, January 14\u201317). FAMPER: A Fully Autonomous Mobile Robot for Pipeline Exploration. Proceedings of the IEEE International Conference on Industrial Technology, Vina del Mar, Chile.","DOI":"10.1109\/ICIT.2010.5472748"},{"key":"ref_18","first-page":"135","article-title":"In-Pipe Inspection Crawler Adaptable to the Pipe Interior Diameter","volume":"26","author":"Moghaddam","year":"2011","journal-title":"Int. J. Robot. Autom."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"635","DOI":"10.1163\/1568553054255646","article-title":"Development of a steerable, wheel-type, in-pipe robot and its path planning","volume":"19","author":"Oya","year":"2005","journal-title":"Adv. Robot."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"681","DOI":"10.1109\/TRO.2012.2183049","article-title":"Design and Motion Planning of a Two-Module Collaborative Indoor Pipeline Inspection Robot","volume":"28","author":"Kwon","year":"2012","journal-title":"Trans. Robot."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"395","DOI":"10.1515\/meceng-2015-0023","article-title":"Design, Modelling and Laboratory Testing of a Pipe Inspection Robot","volume":"62","author":"Ciszewski","year":"2015","journal-title":"Arch. Mech. Eng."},{"key":"ref_22","doi-asserted-by":"crossref","unstructured":"Kakogawa, A., and Ma, S. (2014, January 5\u201310). Speed Analysis for three Modules of an In-Pipe Inspection Robots for Passing through Bent Pipes. Proceedings of the IEEE International Conference on Robotics and Biometrics, Bali, Indonesia.","DOI":"10.1109\/ROBIO.2014.7090585"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"5304","DOI":"10.1109\/TIE.2010.2095392","article-title":"Normal-Force Control for an In-Pipe Robot According to the Inclination of Pipelines","volume":"58","author":"Park","year":"2011","journal-title":"Trans. Ind. Electron."},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Min, J., Setiawan, Y.D., Pratama, P.S., Kim, S.B., and Kim, H.K. (2014, January 24\u201327). Development and Controller Design of Wheeled-Type Pipe Inspection Robot. Proceedings of the IEEE International Conference on Advances in Computing, Communications and Informatics, New Delhi, India.","DOI":"10.1109\/ICACCI.2014.6968543"},{"key":"ref_25","unstructured":"Horodonica, M., Preumont, A., Burda, I., and Mignon, E. (2003, January 5\u20138). The Heli-Pipe Inspection Robots Architecture for Curved Pipes. Proceedings of the IEEE International Conference of Manufacturing Systems, Crystal City Hyatt Regency Washington, DC, USA."},{"key":"ref_26","unstructured":"Nishihara, T., Osuka, K., and Tamura, I. (2010, January 18\u201321). Development of a Simulation Model for Inner-Gas-Pipe Inspection Robot: SPRING. Proceedings of the Society of Instrument and Control Engineers of Japan, Taipei, Taiwan."},{"key":"ref_27","doi-asserted-by":"crossref","unstructured":"Ye, C., Liu, L., Xu, X., and Chen, J. (2015, January 2\u20135). Development of an In-Pipe Robot with Two Steerable Driving Wheels. Proceedings of the IEEE International Conference on Mechatronics and Automation, Beijing, China.","DOI":"10.1109\/ICMA.2015.7237785"},{"key":"ref_28","doi-asserted-by":"crossref","unstructured":"Debenest, P., Guarnieri, M., and Hirose, S. (2014, January 14\u201316). PipeTron Series\u2014Robots for Pipe Inspection. Proceedings of the IEEE 3rd International Conference on Applied Robotics for the Power Industry, Foz do Iguassu, Brazil.","DOI":"10.1109\/CARPI.2014.7030052"},{"key":"ref_29","unstructured":"Sato, K., Ohki, T., and Lim, H.-O. (2011, January 26\u201329). Development of In-Pipe Robot Capable of Coping with Various Diameters. Proceedings of the IEEE 11th International Conference on Control, Automation and Systems, Gyeonggi-do, Korea."},{"key":"ref_30","doi-asserted-by":"crossref","unstructured":"Prada, E., Valasek, M., Virgala, I., Gmiterko, A., Kelemen, M., Hagara, M., and Liptak, T. (2015, January 2\u20135). New Approach of Fixation Possibilities Investigation for Snake Robot in the Pipe. Proceedings of the IEEE International Conference on Mechanicals and Automation, Beijing, China.","DOI":"10.1109\/ICMA.2015.7237657"},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Dertien, E., Stramigioli, S., and Pulles, K. (2011, January 9\u201313). Development of an Inspection Robot for Small Diameter Gas Distribution Mains. Proceedings of the IEEE International Conference on Robotics and Automation (ICRA), Shanghai, China.","DOI":"10.1109\/ICRA.2011.5980077"},{"key":"ref_32","unstructured":"Zagler, A., and Pfeiffer, F. (2003, January 14\u201319). \u201cMORITZ\u201d a Pipe Crawler for Tube Junctions. Proceedings of the IEEE International Conference on Robotics and Automation, Taipei, Taiwan."},{"key":"ref_33","doi-asserted-by":"crossref","unstructured":"Jeon, W., Park, J., Kim, I., Kang, Y.-K., and Yang, H. (2011, January 20\u201322). Development of High Mobility In-Pipe Inspection Robot. Proceedings of the IEEE International Symposium on System Integration, Kyoto, Japan.","DOI":"10.1109\/SII.2011.6147496"},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Lu, Y., Yu, J., Sui, C., and Han, J. (2015, January 8\u201312). Design of In-Pipe 3SPR\/3RPS Parallel Manipulator and its Kinestatics Analysis. Proceedings of the IEEE 5th Annual International Conference on Cyber Technology in Automation, Control and Intelligent Systems, Shenyang, China.","DOI":"10.1109\/CYBER.2015.7287907"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"302","DOI":"10.1177\/0278364911432486","article-title":"Continous Wave Peristaltic Motion in a Robot","volume":"31","author":"Boxerbaum","year":"2012","journal-title":"Int. J. Robot. Res."},{"key":"ref_36","doi-asserted-by":"crossref","unstructured":"Wu, Y., Chatzigeorgiou, D., Youcef-Toumi, K., and Zribi, M. (2015, January 1\u20133). Modeling and Parameter Estimation for In-pipe Swimming Robots. Proceedings of the IEEE American Control Conference, Chicago, IL, USA.","DOI":"10.1109\/ACC.2015.7171028"},{"key":"ref_37","doi-asserted-by":"crossref","unstructured":"Doyle, M.J., Xu, X., Gu, Y., Perez-Diaz, F., Parrott, C., and Grob, R. (2016, January 16\u201321). Modular Hydraulic Propulsion: A Robot that Moves by Routing Fluid Through Itself. Proceedings of the IEEE International Conference on Robotics and Automation, Stockholm, Sweden.","DOI":"10.1109\/ICRA.2016.7487725"},{"key":"ref_38","unstructured":"(2017, September 13). Synthotech Limited. Available online: http:\/\/www.synthotech.com\/."},{"key":"ref_39","unstructured":"(2017, September 13). Premtech Limited. Available online: http:\/\/www.premtechltd.com\/."},{"key":"ref_40","unstructured":"(2017, September 13). PIE\u2014Pipeline Integrity Engineers. Available online: http:\/\/www.pieuk.co.uk\/."}],"container-title":["Robotics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2218-6581\/6\/4\/36\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T18:51:47Z","timestamp":1760208707000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2218-6581\/6\/4\/36"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,11,29]]},"references-count":40,"journal-issue":{"issue":"4","published-online":{"date-parts":[[2017,12]]}},"alternative-id":["robotics6040036"],"URL":"https:\/\/doi.org\/10.3390\/robotics6040036","relation":{},"ISSN":["2218-6581"],"issn-type":[{"value":"2218-6581","type":"electronic"}],"subject":[],"published":{"date-parts":[[2017,11,29]]}}}