PROBLEM TO BE SOLVED: To provide a heart rate meter capable of calculating a heart rate with simpler processing as compared with that of a conventional art regardless of the attaching direction of the heart rate meter with respect to a breast.SOLUTION: A heart rate meter comprises: a heart rate sensor for acquiring an electrocardiographic waveform of a user when being attached to a breast of the user and a control unit which calculates a heart rate on the basis of the electrocardiographic waveform and inverts the acquired electrocardiographic waveform. The electrocardiographic waveform acquired by the heart rate sensor includes either of a first mode electrocardiographic waveform including an R wave having a peak on the high voltage side and a second mode electrocardiographic waveform including an R wave having a peak on the low voltage side. The heart rate meter calculates a heart rate when an electrocardiographic waveform includes the first mode electrocardiographic waveform. When the heart rate cannot be calculated, the heart rate meter inverts the electrocardiographic waveform acquired by the heart rate sensor to calculate a heart rate on the basis of the inverted electrocardiographic waveform.COPYRIGHT: (C)2015,JPO&INPIT【課題】心拍計の胸部に対する装着の向きに関わらず、従来と比較して簡素な処理で心拍数を算出することができる心拍計を提供する。【解決手段】心拍計は、ユーザの胸部に装着されたときにユーザの心電波形を取得する心拍センサと、心電波形に基づいて心拍数の算出を行うとともに、取得された心電波形を反転させる制御部とを備える。心拍センサが取得する心電波形は、高電圧側にピークを有するR波を含む第1態様の心電波形と低電圧側にピークを有するR波を含む第2態様の心電波形のいずれか一方を含み、心電波形が第1態様の心電波形を含んでいるときに心拍数を算出し、心拍数が算出されないときに、心拍センサによって取得された心電波形を反転させ、反転された心電波形に対して心拍数を算出する。【選択図】図6
