Abstract
We developed a system to evaluate the skill of operating a hydraulic excavator. The system employs a remotely controlled (RC) excavator and virtual reality (VR) technology. We remodeled the RC excavator so that it can be operated in the same manner as a real excavator and proceeded to measure the excavator's state. To evaluate the skill of operating this system, we calculated several indices from the data recorded during excavation work and compared the indices obtained for expert and non-expert operators. The results revealed that it is possible to distinguish whether an expert or non-expert is operating the RC excavator. We calculated the same indices from the data recorded during excavation with a real excavator and verified that there exists a high correlation between the indices of the RC excavator and those of the real excavator. Thus, we confirmed that the indices of the real excavator and those of the simulator exhibited similar trends. This suggests that it is possible to partly evaluate the operation characteristics of a real excavator by using an RC excavator with different dynamics compared with a real excavator.
Highlights
Hydraulic excavators are construction machines with working devices that have a high degree of freedom and various attachments
The first axis represents the operation time; the second axis represents the length of the bucket trajectory; the third axis represents the average velocity of the bucket; the fourth axis represents the dispersion of the bucket trajectory; and the fifth to eighth axes represent the dispersion of the lever operation for the swing, boom, arm, and bucket
We developed a simulator that can measure each joint angle in real time by using an remotely controlled (RC) excavator with the same viewpoint and operating interface as a real excavator
Summary
Hydraulic excavators are construction machines with working devices that have a high degree of freedom and various attachments. Skill Evaluation of Excavator Operation of excavator simulators: It is difficult to reproduce the behavior of soil excavated in real time because of the calculation cost. We think that this problem can be solved by using a training system using a remote-controlled (RC) toy excavator. Research has been conducted on quantifying the operation skills of an excavator (Bernold et al, 2003; Sakaida et al, 2008; Koiwai et al, 2016) It is unknown, whether the skill evaluation method applied for a real excavator can be applied when using an RC toy excavator that cannot completely simulate the characteristics of actual excavators. The new contributions of this paper are a comparison of the behavior of our RC excavator and that of a real excavator, a subjective evaluation of the operability and the reality of the field of view of our RC excavator system, and verification of skill evaluation indices including a new index for lever operation
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
