Closed loop system and method for heating a probe

G - Physics – 01 – K

Patent

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G01K 7/42 (2006.01)

Patent

CA 2373371

A system and method for rapidly preheating the probe of a thermometer to a temperature closer to the temperature of a patient to be measured. The system comprises a probe heater, a probe temperature sensor, a power source, and a processor for controlling the delivery of energy from the power source to the heater. The processor adds an offset to the drive level to the heater which is dependent on the ambient temperature and the power source voltage to achieve more rapid heater responses. The processor maintains control over the drive level applied to the heater in accordance with the temperature sensor so that at all times a closed loop system is provided.

L'invention concerne un système et un procédé servant à préchauffer rapidement la sonde d'un thermomètre à une température proche de celle d'un patient, à qui l'on doit prendre la température. Le système comprend un dispositif de chauffe de sonde, un détecteur de température de la sonde, une source de courant, et un processeur servant à réguler l'apport d'énergie de la source de courant au dispositif de chauffe. Ledit processeur ajoute un décalage au niveau d'attaque du dispositif de chauffe qui est dépendant de la température ambiante et de la tension de la source de courant afin d'obtenir une réponse plus rapide dudit dispositif. Le processeur maintient le contrôle du niveau d'attaque appliqué au dispositif de chauffe en tenant compte du détecteur de températures, de telle manière qu'à tout moment un système à boucle fermée est mis en place.

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