NDLI: A long-range and long-life telemetry data-acquisition system for heart rate and multiple body temperatures from free-ranging animals

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A long-range and long-life telemetry data-acquisition system for heart rate and multiple body temperatures from free-ranging animals

Content Provider	NASA Technical Reports Server (NTRS)
Author	Miranda, R. F. Lund, G. F. Westbrook, R. M. Fryer, T. B.
Copyright Year	1979
Description	The system includes an implantable transmitter, external receiver-retransmitter collar, and a microprocessor-controlled demodulator. The size of the implant is suitable for animals with body weights of a few kilograms or more; further size reduction of the implant is possible. The ECG is sensed by electrodes designed for internal telemetry and to reduce movement artifacts. The R-wave characteristics are then specifically selected to trigger a short radio frequency pulse. Temperatures are sensed at desired locations by thermistors and then, based on a heartbeat counter, transmitted intermittently via pulse interval modulation. This modulation scheme includes first and last calibration intervals for a reference by ratios with the temperature intervals to achieve good accuracy even over long periods. Pulse duration and pulse sequencing are used to discriminate between heart rate and temperature pulses as well as RF interference.
File Size	4614213
Page Count	74
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19790018591
Archival Resource Key	ark:/13960/t9h46j66s
Language	English
Publisher Date	1979-05-01
Access Restriction	Open
Subject Keyword	Biometrics Heart Rate Implanted Electrodes Biology Radio Telemetry Biotelemetry Body Temperature Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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