Self-inductance sensor

Details Self-inductance sensor Self-inductance sensor

1987-04-24

1989-04-04

Coven, Edward M.

Surgery

Truss

Pad

128725, 128782, 33179, A61B 508

Patent

active

048176257

ABSTRACT:
The self-inductance sensor disclosed includes a band of distensible material, and a strap of nondistensible material which form in combination a closed loop which circumscribes the object. A conductor is secured to the band of distensible material. The conductor includes two portions each extending from one end of the band to the other and having an irregular repetitive configuration. The conductor portions are symmetrically juxtaposed to one another to form a series of substantially enclosed areas which change shape as the band is distended. The self-inductance of the conductor is measured to indicate the relative extension of the band and thus the change in circumference of the object.

REFERENCES:
patent: 3560845 (1971-02-01), Goldberg et al.
patent: 4308872 (1982-01-01), Watson et al.
patent: 4373534 (1983-02-01), Watson
Milledge, J. S., and Stott, F. D., "Inductive Plethysmography-a New Respiratory Transducer", Proceedings of the Physiological Society, Jan. 1977, pp. 4-5.
Shapiro, A. and Cohen, H. D., (1965), "Transactions of the New York Academy of Science", vol. 27, pp. 634-649.
Konno, K. and Mead, J., (1967), "Journal of Applied Physiology", Vol. 22, pp. 407-422.

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