Patent ID: 8849609
Filing Date: 2014-09-30
Classification: G01G

Abstract:
1. A number-of-step detection system comprising: a vibration data acquiring unit that acquires vibration data obtained by detecting vibration caused by body motion, and a storage unit that stores walking waveform data based on the vibration data and feature waveform data for discriminating the walking waveform data; a calculation unit that executes a decision criterion data creating process for creating number-of-step decision criterion data suited for measuring number of steps based on the vibration data; the storage unit stores the number-of-step decision criterion data calculated by the calculation unit; and a control unit that controls the vibration data acquiring unit, the storage unit, and the calculation unit, wherein a number-of-step calculation process of calculating the number of steps from the vibration data by using the number-of-step decision criterion data is executed by the control unit; the number-of-step decision criterion data stored in the storage unit is updated to the number-of-step decision criterion data calculated by the control unit; the storage unit is configured to store, responsive to user movement, a plurality of the feature waveform data corresponding to a movement characteristic of a user; and the decision criterion data creating process includes matching acquired walking waveform data to a similar one of the plurality of feature waveform data stored in the storage unit, and creating the number-of-step decision criterion data that becomes a criterion in the number-of-step decision based on a local maximal value and a local minimal value of the walking waveform data which corresponds to the one of the plurality of feature waveform data.