| 摘要 |
PURPOSE:To constitute a temp. signal transmission system requiring no opening part, by allowing an optical signal to pass through a transparent partition wall while modulating the same at the temp. detected by a thermometer and receiving the modulated signal by a light receiver to demodulate the same and extracting the signal corresponding to a temp. signal to display the same. CONSTITUTION:In an outdoor temp. sensor 1, the temp. calculated by a temp. detection part 11 receives A/D conversion by an A/D converter 12 and the light output of a light emitting circuit 13 is subjected to pulse code modulation to be transmitted to an indoor side through a transparent glass. In the display part 2 provided in a room, said light emitting signal is received by a light receiving element 21 and demodulated by CPU22 to be displayed in a temp. display part 23. By this method, outdoor temp. can be displayed in a room without providing an opening part. |
