| 摘要 |
<p>PURPOSE:To attain a precise control of temperatures, by performing only the measurement and display of temperatures during the set waiting time and giving the temperature control with the last temperature information after the lapse of the waiting time so that an object to receive the temperature control reaches the target temperature. CONSTITUTION:A temperature sensor 11 consisting of a surface acoustic wave resonator 12 and an amplifier 13 delivers the oscillating frequency corresponding to the ambient temperature and radiates the frequency into a room after the amplification 14. A receiving part 16 receives the radiated electric wave and then amplifies 24 the signal which received a conversion of frequency to supply it to an AND circuit 25. The reference signal of a frequency that varies at 0.1 C is fed to the circuit 25. The output of the circuit 25 is fed to a counter 27 to be turned into the temperature information. This temperature information is fed to a computer COM28. The COM28 displays 29 the detected temperature and delivers the temperature control signal in response to the data read in from an input data 30. After reading in the target temperature T1, the waiting time t and the detected temperature T2, the COM28 keeps the display of the T2 until the time t which is set in consideration of the heat time constant of an object to receive the temperature control is obtained. The COM28 delivers the control signal proportional to T1-T2=DELTAT when t=0 is satisfied.</p> |
