Mitsubishi Heavy Industries announces “MHI-MEISTeR”, a remote-controlled robot for nuclear power plants equipped with two arms

On December 6, Mitsubishi Heavy Industries, Ltd. is a remote work robot “MHI-MEISTeR” that can freely move around the site of disasters and severe accidents that people cannot approach, and can perform not only inspection but also maintenance and repair work with two robot arms. Announced that it has developed. MEISTeR is an abbreviation for Maintenance Equipment Integrated System of Telecontrol Robot and is read as “Meister”.

The aircraft was an environment-resistant robot jointly developed by the Japan Atomic Energy Research Institute (currently Japan Atomic Energy Agency) and the company in the wake of the criticality accident at a nuclear fuel processing facility in Tokai Village, Ibaraki Prefecture in 1999. It was developed based on “Rabot”.

Specifically, TEPCO’s Fukushima Daiichi Nuclear Power Station will utilize the technology cultivated at the maintenance site of nuclear facilities for the in-house robot “MARS-D” manufactured at that time as its sister machine. It is an improved form that can be used in. Radiation resistance and remote control are improved, such as measures to prevent contamination inside the robot.

MEISTeR is characterized by having a robot arm, which has 7 degrees of freedom (joints) with one arm similar to a human arm, and has a payload of 15 kg per arm. With a mechanism that allows you to easily attach and detach various dedicated work tools to the tip, you can hold things on one side and cut the other, or attach different tools to the left and right to perform two types of work at the same time. Can be done.

This time, special tools such as drills and hands (pinching claws) have also been developed for concrete contamination investigation, and by equipping MEITeR with them, samples up to a depth of about 70 mm from the concrete wall or floor can be remotely controlled. It became possible to collect at. It can be expected to play an active role in pollution status surveys in high-dose areas that people cannot approach.

In addition, the movement mechanism of MEISTeR adopts a crawler that can run on rough terrain and narrow places (automatic ground tracking type independent 4 crawler type), and the maximum speed is 2 km / h, inclination 40 degrees, step 220 mm. It has the ability to climb stairs and run on rough terrain.

The MEITeR is equipped with two high-performance robot arms on a dolly that has the ability to move. As a result, it has the great advantage of being multifunctional, which can quickly respond to the above-mentioned concrete drilling, cutting of handrails and pipes, removal of obstacles, decontamination and simple repair, which could not be handled by conventional exploration robots. And said.

In the future, the company plans to develop various advanced tools and other advanced remote work robot technologies to meet the diverse needs of the Fukushima nuclear power plant.

The specifications are as follows.

  • Dimensions (outer shape): Overall length 1250 mm x Overall width 700 mm x Overall height 1300 mm Mass: 440 kg
  • Movement method: Automatic tracking to the ground Independent 4-crawler type
  • Travel speed: 2km / h
  • Driving performance: 40 degrees incline, up and down stairs up to 220 mm, driving on rough terrain, driving in narrow places
  • Communication: Wireless / wired selection (when wireless, it runs on battery for 2 hours)
  • Robot arm: Equipped with two 7-axis arms. Carrying mass per bottle 15 kg

Remote work robot “MHI-MEISTeR” developed by Mitsubishi Heavy Industries