Patent ID: 8588897
Filing Date: 2013-11-19
Classification: A61B,A63B

Abstract:
1. A heartbeat detecting device to be applied to a cycle or a movable physical training implement with a handlebar, wherein the handlebar has a hollow handlebar tube and said hollow handlebar tube has opposite end portions with one handle provided at each of said opposite end portions, said heartbeat detecting device comprising: a reference electrode and an active electrode applicable to each of said handles; and a microprocessor, wherein the reference electrodes of both handles are electrically connected to each other with insulated electric wires, and said reference electrodes of both handles and each of said active electrodes provide an input signal to an amplifying section, wherein said insulated electric wires are located inside the hollow handlebar tube and are electrically isolated from the handlebar tube to transmit accurate and stable user's heart signals to the microprocessor through said amplifying section, wherein said amplifying section comprises, wherein said microprocessor comprises a program memory and a work memory, said program memory storing a set of instructions configured to provide a cardiac frequency measurement which comprises detecting a signal peak in a first measurement window, causing a silence period of duration shorter than a time between two earlier peaks, configured to prevent noise or artifacts from negatively affecting said cardiac frequency measurement, opening a second measurement window, measuring a subsequent heartbeat, and closing said second measurement window after measuring said subsequent heartbeat.