PROBLEM TO BE SOLVED: To prevent degrading in reliability of roll angle of a machine body calculated on the basis of the output of a sensor for roll angle detection, caused by acceleration generated by a speed change during a turning travel.SOLUTION: The roll angle detecting structure of working machine includes a sensor 77 for detecting a roll angle which changes its output in response to the roll angle of the machine body, and a roll angle calculation means 40Da for calculating the roll angle of the machine body on the basis of the output of the sensor 77, and is configured to perform a centrifugal force calculation processing for calculating a centrifugal force acting on the sensor 77, to perform a correction processing for correcting the output of the sensor 77 on the basis of a value obtained by the centrifugal force calculation processing, and to calculate the roll angle of the machine body on the basis of the output of the sensor 77 after the correction processing, while the roll angle calculation means 40Da detecting the turning travel of the machine body on the base of the output of a rotation information output means (A), and is also configured to perform a capture suspension processing not taking in the output of the sensor 77 while detecting a speed change in turning travel on the basis of the outputs of the rotation information output means (A) and a speed change information output means (B).COPYRIGHT: (C)2011,JPO&INPIT【課題】旋回走行中の変速により発生する加速度に起因して、ロール角度検出用のセンサの出力に基づいて演算した機体のロール角度が信頼性の低いものになるのを防止する。【解決手段】機体のロール角度に応じて出力が変化するロール角度検出用のセンサ77と、このセンサ77の出力に基づいて機体のロール角度を演算するロール角度演算手段40Daを備え、ロール角度演算手段40Daが、旋回情報出力手段Aの出力に基づいて機体の旋回走行を検知している間は、センサ77に働く遠心力を演算する遠心力演算処理と、この遠心力演算処理で得た値に基づいてセンサ77の出力を補正する補正処理を行い、この補正処理後のセンサ77の出力に基づいて機体のロール角度を演算し、旋回情報出力手段Aと変速情報出力手段Bの出力に基づいて旋回走行中の変速を検知している間は、センサ77の出力を取り込まない取込中断処理を行うように構成してある。【選択図】図8
