| 摘要 |
A pedometer which can perform a step counting more correctly by finely adjusting the detection sensitivity freely while suppressing the element-based variations and individual difference effects is provided. An acceleration sensor outputs a walk signal having a charge corresponding to a walk. The walk signal is converted by charge-voltage conversion means into a voltage walk signal, removed of noise by filter means, amplified by amplification means and converted by binarization means into a digital signal, followed by being inputted to a CPU. The CPU performs open-close control of switches, such that the walking pitch, calculated based on the walk signal, comes within a predetermined walking pitch range stored in the storage means thereby controlling the conversion gain of the charge-voltage conversion means and controlling the walk detection sensitivity properly.
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