成果報告書詳細
管理番号20130000000412
タイトル*平成24年度中間年報 生活支援ロボット実用化プロジェクト 安全技術を導入した搭乗型生活支援ロボットの開発 屋外移動支援機器における安全エンジニアリング技術の研究開発
公開日2013/8/28
報告書年度2012 - 2012
委託先名IDEC株式会社
プロジェクト番号P09009
部署名技術開発推進部
和文要約
英文要約April 4, 2013

Project for Practical Applications of Service Robots
Developmental item of this project
Developmental item [5]
Development of person carrier robots based on safety technology

Title:Research and Development of Safety Engineering Technology for Outdoor Mobile Personal Care Robots (2011-2013)

1. Research and Development Details and Results
(1) Development of safety sensing technology
Ambient light and obstacle detection tests were performed on the outdoor laser scanner for electromagnetic guided golf carts. The laser scanner operated normally at 10,000 lx using halogen light source for the direct ambient light test. At 100,000 lx sunlight, the error was ±40mm at up to 10m distance and also only minus error of safe side within the guarded area of 2m radius. Details of obstacle detection test will be discussed later. A level detection sensor for mobility scooter was also developed, utilizing the conventional laser scanner that was redesigned and improved to suit the mobility scooter. The scanner detects uneven level on the road with the reflection from the road surface. When the reflection comes from more than the set distance, the scanner determines that the level is uneven.
(2) Development of safety wireless communication
For the emergency stop function of mobile personal care robots, a new communication protocol and the prototype were developed as the safety wireless communication technology complying with IEC61508. The new communication protocol greatly improves the communication speed. In the new communication protocol, a safety output can be shut down within 500ms after an emergency stop operation or communication timeout at the communication of a maximum of 8 versus 8. The prototype has a built-in battery, and communication distance is more than 100m.
(3) Development of functional safety system technology and risk assessment technology
A stop/deceleration system as a safety-related part of control system, consisting of safety products, was designed and installed on a mobility scooter as a prototype. The accident analysis using the National Institute of Technology and Evaluation database reveals that falling is the biggest risk for a mobility scooter. Therefore, a mobility scooter must have a stop/deceleration system as a safety measure to detect uneven levels. Although this safety measure is categorized only as a safety support since the mobility scooter is manual handling type, the control system was designed with as much safety aspects of international standards as possible, such functional safety.
(4) Development of safety engineering technology based on traffic engineering in broad area
A hearing survey was conducted at 6 golf courses regarding golf carts’ accidents. Additionally, a survey utilizing a website was conducted to gather actual experiences by golf players, of incidents that could have led to serious injuries, and valid responses were collected from 1000 people. From the results, the causes of golf cart accidents were broken down into patterns to make a questionnaire, which was sent to as many as 2400 golf courses throughout Japan. The responses will be analyzed statistically and utilized to create a safety guidebook for technical safety measures and residual risks.
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