| 摘要 |
PURPOSE:To simplify the constitution of a temperature detector, by feeding a sweep pulse to a temperature-sensitive resonance circuit and detecting the duration of signal obtained by the resonance of said resonance circuit. CONSTITUTION:The continuous wave produced from a continuous wave oscillating circuit 1 is applied to an intermittent wave transmitting circuit 2, and an intermittent wave is transmitted to a temperature-sensitive resonance circuit 3 provided at an area where the temperature to be measured is set. When the temperature of the circuit 3 has a change and the resonance frequency f01 is coincident with the transmitted wave f1, the circuit 3 has the resonance with the wave f1 to extend the resonance long. As a result, the signal of a frequency equal to the wave f1 is received intermittently at a time limit receiving circuit 4. The circuit 4 recognizes several pulses of the signal and transmits the signal and transmits the signal to a control circuit 5 to give the control to a heating circuit. The resonance frequency f0 of the circuit 3 is decided by the temperature. Thus an optional temperature can be set by putting a scale of temperature directly at the frequency equivalent to the circuit 1. |
