Period measurement system

Details Period measurement system Period measurement system

1981-07-07

1984-06-26

Krass, Errol A.

Boots, shoes, and leggings

128698, 128700, 364569, G06F 1542, A01B 504, G01R 2302

Patent

active

044569599

ABSTRACT:
An autocorrelation function is computed for a value of a phase difference variable over a range determined by a set minimum period and a set maximum periods of one beat, corresponding to a maximum heart rate and a minimum heart rate, respectively. The maximum and minimum rates are estimated from a latest computed heart rate obtained from a preceding measurement of a heartbeat signal, by way of sampling the heartbeat signal at a predetermined sampling period and then using the data obtained from the sampling operation. The period of the heartbeat signal is computed from the computed autocorrelation function, and the sampling period is decided from the computed heartbeat signal period.

REFERENCES:
patent: 3982528 (1976-09-01), Phillipps
patent: 3991365 (1976-11-01), Takeuchi
patent: 4027657 (1977-06-01), Sureau et al.
patent: 4037151 (1977-07-01), Takevchi
patent: 4209835 (1980-06-01), Guadagnolo
patent: 4211237 (1980-07-01), Nagel
patent: 4239048 (1980-12-01), Stever
patent: 4299234 (1981-11-01), Epstein et al.
patent: 4319334 (1982-03-01), Gurry
IEEE Transactions on Bio-Medical Engineering, vol. BME-15, No. 1, Jan. 1968, New York (US), J. H. Van Bemmel "Detection of Weak Foetal Electrocardiograms by Autocorrelation and Crosscorrelation of Envelopes", pp. 17 to 23.
IEEE Transactions on Bio-Medical Engineering, vol. BME-13 No. 1, Jan. 1966, New York (US) A. G. Favret et al. "Evaluation of Autocorrelation Techniques for Detection of the Fetal Electrocardiogram", pp. 37 to 43.
IEE Proceedings A, vol. 128, No. 8, Nov. 1971, Hitchin Herts (GB), C. H. Sande et al. "Aid to Diagnoisis of Foetal Bradicardias using the Autocorrelation Function", pp. 571 to 575.

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