The present invention relates to a portable electronic device and a heart rate sensing method of the same. The portable electronic device uses the initial heart rate value to calculate a possible heart rate variation. Then a reference range is determined. Only the instantaneous heart rate value falling in the reference range is output as a correct instantaneous heart rate value. Thus, the too large or too small erroneous heart rate values influenced by the vibration noise are eliminated to precisely output the correct instantaneous heart rate value. Therefore, the extra vibration sensors need not to be installed to lower the cost and to reduce the volume.本發明為一種可攜式電子裝置及其即時心跳量測方法,係利用所獲得的初始心跳值計算一可能產生的心跳變化量,而設定一基準範圍,隨後所獲得的即時心跳值必須落在該基準範圍內,方能輸出為正確的即時心跳值,藉此可排除因震動雜訊影響而過大或過小的錯誤心跳值,故可準確的輸出正確的即時心跳值,而無需額外增設震動感測器,以達到降低成本及縮小體積的目的。
