[Microcomputer-assisted telemetry system for recording ultradian temperature rhythms in large animals].

Abstract

A radiotelemetry system for measurement of deep body temperature in unrestrained farm animals is presented. Because the main attention is set on the small ultradian temperature rhythms, a system with high sensitivity (0.05 degrees C) and little transmission-interferences (high field intensity of the transmitter) was developed. Circuit diagrams of the implantable thermoprobe and the basic principles of the recording unit are pointed out. Management of measurements as well as recording of data is software-controlled by a microcomputer. Further computerized processing presupposes that there is no incorrect data. Therefore the complete elimination of interferences is carried out automatically by a computer. The algorithm used for this is described in detail.