High frequency heating apparatus with wireless temperature probe

Details High frequency heating apparatus with wireless temperature probe High frequency heating apparatus with wireless temperature probe

1983-03-02

1985-05-21

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1055E, 219 1055R, 99421TP, 34087017, 34087026, 340592, 374155, 374149, H05B 668

Patent

active

045188394

ABSTRACT:
A novel high frequency heating apparatus for detecting the internal temperature of an object contained in a heating chamber and controlling the heating thereof is disclosed, in which the temperature change of the object is picked up as a change of the resistance value of a thermistor. The resistance change is converted into a change of the oscillation frequency of an oscillator and transmitted with the ultrasonic wave as a medium. The power supply for the transmitter circuit is provided in such a manner that the high frequency filled in the heating chamber for heating the object is received by an antenna and rectified by a diode. At the receiving end, this ultrasonic wave is picked up as a temperature signal of the object, and processed by a microcomputer, so that the temperature of the object is detected for heating control.

REFERENCES:
patent: 3878502 (1975-04-01), Rochelle
patent: 4249418 (1981-02-01), Ebata
patent: 4340796 (1982-07-01), Yamaguchi et al.
patent: 4381439 (1983-04-01), Miyazawa et al.

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