Toyo Construction Co., Ltd. (Head office: Chiyoda city, Tokyo Metropolis, President
and Representative Director: Kyoji Takezawa) has, in collaboration with RICOH Industrial
Solutions Inc. (Head office: Ota city, Tokyo Metropolis, Representative Director, President:
Hiroshi Takemoto, hereinafter “RINS”), jointly developed the “Safety support system for
crane operation” at a construction site, utilizing a miniature AI stereo camera made by RINS
A crane is usually operated by a crane operator according to the instructions by a signal person,
however, in a certain work area, a crane operator may not be able to make a direct visual confirmation
of the point of load lowering. In order to reduce such a risk, we have built up a system to notify
a crate operator of approaching workers to the hoisted load with information of three-dimensional
relative locations of the hoisted load and the workers, through identification of the hoisted load
and the workers by the AI, installing a miniature AI stereo camera at the tip of a mobile crane
operated at a construction site for identification of moving objects and recognition of the
three-dimensional location of the object.
Because of its capability to identify the three-dimensional location of hoisted load, this system enables
to detect the condition where the hoisted load is in dynamic lift off, therefore, the crane operator can
grasp the changing status from the dynamic lift off to a suspended state, in addition to the location
of the hoisted load and the workers.
Moreover, if judged to be at risk, this system will save the video of the work before and after
the judgment as a movie file to the cloud. The work manager is able to specify the cause of
the dangerous work by checking the movie as well as to provide feedback by sharing the movie
at the KY activities.
Up to now, safety improvement was confirmed by the operation verification of the system,
after making the AI camera learn the working conditions in marine works such as installation
of wave-dissipating concrete blocks, driving steel pipe pile, and caisson manufacturing, etc.
We will improve this system by application to the automated construction of construction work machine.
【Advantages of Safety support system for crane operation】
● Detecting and following the three-dimensional location of the hoisted load and the workers
by the camera downwardly installed at the tip of the crane.
● The operator can recognize the location of the workers even in a condition where the operato
is unable to make a direct visual confirmation.
● Able to detect the workers regardless of the installation position or orientation of the camera.
● Because the video is saved in the cloud, it is available for staff anywhere, and for specifying
the cause of the dangerous work as well as for providing feedback at the KY activities.
【NETIS No.】QS-220019-A (reference)
【Patent No.】6867089
