ハンドル形電動車椅子の操作技能に関する定量的評価手法の開発—走行中の観察評価とドライブレコーダの操作ログ解析から

Development of a quantitative measure of driving performance for operating skills of a mobility scooter: Using observational assessments and analyses of operation logs from a drive recorder

要旨：本研究の目的は，ハンドル形電動車椅子運転時の操作技能の観察およびドライブレコーダで収集した操作ログの評価の有用性を検討することである．ハンドル形電動車椅子操作経験がない地域在住高齢者7名を対象に，屋内テストコース走行中の操作技能を観察と操作ログで評価した結果，観察では課題の難易度や失敗の多さなどを総合的に評価できた．また，操作ログではハンドルやスピード調整の操作特性を定量的に評価でき，衝突につながる危険な運転を検出できる可能性も示唆された．観察と操作ログを用いる評価システムは，操作技能評価において相互に補完しあう有効な手法となる可能性がある．今後は実環境で使用できる評価システム開発を進める．

　This study aimed to evaluate the operating skills of a mobility scooter using observation and operation logs from a drive recorder and clarify the usefulness of the operation logs by comparing the evaluation methods. The operating skills of seven older adults were assessed by observation and operation logs during test course driving. The results revealed that the observation provided a comprehensive assessment of the task difficulty and the number of failures, while the operation logs provided a quantitative assessment of the characteristics of steering wheel and speed adjustment operations. In addition, the operation log suggested the possibility of detecting dangerous driving that could lead to an accident. The evaluation system using observation and operation logs is considered an effective method that complements both types in the evaluation of operation skills. This result can be applied to develop an evaluation system that is used in real-life environments.