Without being obstructed the heart beat signal in the radio interference, the manner which is transmitted

摘要

PCT No. PCT/FI94/00353 Sec. 371 Date Apr. 14, 1995 Sec. 102(e) Date Apr. 14, 1995 PCT Filed Aug. 15, 1994 PCT Pub. No. WO95/05578 PCT Pub. Date Feb. 23, 1995A method of interference-tolerant heartbeat measurement comprises the steps of measuring the person's heartbeat signal at a suitable part of the body and transmitting the signal by telemetric transmission from a transmitter to a receiver as a pulse message formed by successive measuring pulses. A transmission interval of at least some pulse signals is proportional to the person's measured heartbeat rate. Each measuring pulse is formed of at least two identification pulses (C1 and C2), whereby the time interval (tx) between the identification pulses corresponds to a specific time interval determined for each transmitter-receiver pair, on the basis of which specific interval the receiver identifies the pulse signals intended for itself.