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Method and Apparatus for Measuring and Monitoring Vital Functions or Presence

  • US 20070276202A1
  • Filed: 07/01/2005
  • Published: 11/29/2007
  • Est. Priority Date: 07/01/2004
  • Status: Abandoned Application
First Claim
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1. A procedure for the monitoring of a person or an animal on a base (2) with a device that has at least one plane like sensor element (3) arranged to it for transforming the mechanical forces caused by the measured movements and/or the vital signs to electric signals and a signal handling device (7) that registers the movements and/or the respiration frequency and/or the pulse frequency and/or the presence on a base with the help of the signals obtained from the sensor element, characterised in that:

  • 1.) After the beginning filtering the sensor signal is divided to n subchannels. 2.) An absolute value is taken from the signal in the subchannels, 3.) Every detected signal is low pass filtered so that highest measurable pulse and/or respiration frequency can be determined, 4.) Every detected signal is high pass filtered so that lowest measurable pulse and/or respiration frequency can be determined, 5.) From these detected signals the intervals between the crossings of the zero points are measured. 6.) The alteration of the intervals is measured, 7.) From the sub channels the one with the least alteration is chosen. 8.) This interval is used to point out the pulse and/or respiration frequency.

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