Civil engineering work still involves many dangerous and grueling tasks, so improving work environments and ensuring safety are challenges facing this field. The development of construction machines are also essential to prepare for the aging problem of construction workers and shortage of young experienced workers in near future.This research project was conducted to overcome these problems by development of the basic technologies with three-dimensional information, and realize the autonomous operation of hydraulic excavators, which is, a typical general purpose construction machine. We have implemented a prototype of the autonomous hydraulic excavator, which performs the soil excavation and loading work under basic conditions. The achieved work speed and finished product precision were almost same as those of normal work by humans.
Civil engineering construction work has always been accompanied by a high proportion of tasks that are either dangerous or unpleasant or both. Enhancing the general working environment and boosting safety levels are critical issues for the industry. Meanwhile, the industry has been slow to embrace IT, and there is substantial scope for the use of technology to boost efficiency, cut costs and improve quality levels in construction. In a bid to address this issue, the Ministry of Land, Infrastructure and Transport launched a five-year project in FY2003 entitled Development of Construction Robots and Associated IT Systems. This paper reports on the research and development work carried out by the authors in connection with the project. The project developed a three-dimensional space description method for civil engineering execution, which can now be applied to finished work control etc. and used by construction machinery. Foundation technologies needed for self-controlled excavation and loading by a hydraulic excavator have been developed and verified to the level that, under basic conditions, they have attained speed and precision equal to that by a human operator.Keywords: execution technology, information technology, robot technology, three-dimensional information, construction equipment
Outline of, and Background to, the ProjectCivil engineering work is still performed in inferior work environments and involves dangerous and grueling tasks. And the introduction of IT is behind that in other industries, demanding the development of technologies to increase work efficiency, cut costs, and improve quality. Some researches on this field have produced a number of results, such as the research about the Automatic Excavator. The goals of the research were to apply IT, RT etc. to earthwork in order to achieve execution control such as control and inspection of completed work based on three dimensional design and land form information, plus IT execution including supporting and automating the operation of construction machinery (see Fig. 1) [12]
ABSTRACT:In present the unmanned construction system technology is adapted on initial operation against of the disaster occasion. For instance it has been used in Unzen.It depends on the scale and site situation of disaster which system should be applied to.A lot of remote control technology of operating construction machinery has been developed as that technology.Underwater bulldozer was developed in 1968、which is a start of the technology.Recently the remote control technology has been applied to restoration works for digging、loading and transportation after the eruption of Unzen.The present study verifies it concerning the operativeness of a remote system that offers the site information by the monitor and operates it.In the research, it has aimed at the operativeness improvement, the working efficiency improvement、and the tiredness decrease. Arrangement and the operation of the monitor are researched now. Moreover, we do the examination for the system improvement in the future.In this report, the operation experimentation of 'Remote control in the site 'and' Remote control systems that displayed the monitor and operated the site information' (two kinds of systems) was done.And, it is the one that the ability and the behavior pattern that recognized the space of the operator were verified.
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