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Medical and biological engineering

, Volume 5, Issue 2, pp 153–163 | Cite as

A heart rate meter for measurement of instantaneous and average rates

  • R. D. McDonald
  • A. R. Fenelon
Technical Note

Keywords

Instantaneous Rate Schmitt Trigger Frequency Reading Valve Version Decade Counter 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of symbols

e(C)

Voltage across capacitor C

eK

cathode voltage

en

voltage representing periodt n

\(\bar E\)

average voltage across meter

\(\bar e\)

average voltage representing\(\bar f\)

\(\bar f\)

average frequency or rate

f

meter frequency reading

K

constant

tn

period

\(\bar t\)

average period

Tn

sum ofn periods

α

ratio of successive periods

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References

  1. Andrew, A. M. andRoberts, T. D. (1954)Electron. Engng.,26, 469–474.Google Scholar
  2. McDonald, R. D. (1966)Electron. Engng.,38, 714–717.Google Scholar
  3. Sloman, G. andTyson, G. (1962)Electron. Engng.,36, 290–295.Google Scholar
  4. Tove, P. A. andCzekajewski, J. (1965)Med. biol. Engng,3, 57–62.Google Scholar

Copyright information

© International Federation for Medical and Biological Engineering 1967

Authors and Affiliations

  • R. D. McDonald
    • 1
  • A. R. Fenelon
    • 1
  1. 1.Department of Medical ElectronicsThe Royal Melbourne HospitalAustralia

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