User's e.g. driver, cardiac rhythm measuring system for use in motor vehicle, has accelerometer and integration unit for determining speed of sensing electrodes, where electrodes provide signals to deduce cardiac rhythm of user

摘要

#CMT# #/CMT# The system (10) has sensing electrodes (E1-E3) providing signals to deduce a cardiac rhythm of a user and moving according to movement of the user. Signal processing units formed of amplifying and filtering circuit (20), analog-digital conversion unit (22) and accelerometer (36) process the signals. The accelerometer and an integration unit (38) determine speed of the electrodes, where the accelerometer measures acceleration of the electrodes. The integration unit integrates a signal (S-D) provided by the accelerometer and provides a noise characteristic signal (S-E) i.e. reference signal. #CMT#USE : #/CMT# System for measuring cardiac rhythm of a user e.g. driver, when the user is seated on a seat of a motor vehicle to detect sleep mode of the driver. Can also be used for measuring cardiac rhythm of a patient seated in a wheel chair or laid on a fixed or movable bed in a hospital or an aged person in home. #CMT#ADVANTAGE : #/CMT# The signal processing units formed of amplifying and filtering circuit, analog-digital conversion unit and accelerometer process the signals provided by the electrodes for reducing the noise generated during the movement of user, thus measuring the cardiac rhythm of the user in a reliable manner. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of a cardiac rhythm measurement system arranged on a movable vehicle. E1-E3 : Sensing electrodes S-D : Signal S-E : Noise characteristic signal 10 : Cardiac rhythm measuring system 20 : Amplifying and filtering circuit 22 : Analog-digital conversion unit 36 : Accelerometer 38 : Integration unit.