PROBLEM TO BE SOLVED: To improve the freedom of modes of use and measurement accuracy.SOLUTION: An attachment guide 31 is provided that allows a belt mounting body 2 and a clip mounting body 4 to be attached to and detached from a momentum meter body 3 comprising an acceleration detector 12 for detecting accelerations and an arithmetic part 14 that executes body movement arithmetic processing (steps S21-S26, S31-S36, S41-S43) to calculate the movement of a living body based on acceleration data. The arithmetic part 14 is constituted: to execute attachment/detachment detection processing (steps S2, S3, S9, S10) to detect attachment and detachment from changes in acceleration manifested in the acceleration data when the belt mounting body 2 or clip mounting body 4 is attached to or detached from the removable guide 31 and to execute the body movement arithmetic processing after switching the same to a mode that matches the status after attachment/detachment based on the detected attachment/detachment.COPYRIGHT: (C)2010,JPO&INPIT【課題】使用態様の自由度を向上するとともに測定精度を向上する。【解決手段】加速度を検出する加速度検知部12と、加速度データに基づいて生体の体動を算出する体動算出処理(ステップS21~S26,S31~S36,S41~S43)を実行する演算部14とを備えた運動量計本体3に、ベルト型装着体2およびクリップ型装着体4が着脱されることを許容する着脱ガイド31を備え、前記演算部14を、前記着脱ガイド31に前記ベルト型装着体2またはクリップ型装着体4を着脱する際に前記加速度データに現れる加速度の変化から着脱を検出する着脱検出処理(ステップS2,S3,S9,S10)を実行し、検出した着脱に基づいて前記体動算出処理を着脱後の状態に合うモードに切り替えて実行する構成にした。【選択図】図2
