| 摘要 |
PURPOSE:To provide excellent safety and reliability to an automatic door by a method wherein signals from sensors buried in a gateway undergo A/D conversion, and signals for opening and shutting the door are generated, with noises resulting from movement of the door corrected, only of components made by DC amplification out of the converted signals. CONSTITUTION:For automatic door control devices 100 and 100' for controlling a motor 9 for opening and shutting doors 2 and 4, sensors 10 and 10' buried on both sides with the doors 2 and 4 on a gateway interposed in between for functioning as capacitors and working for sensing human bodies are connected respectively to the control devices 100 and 100'. Outputs from high-frequency oscillation detectors connected to the sensors 10 and 10' are amplified, and A/D conversion for digitization is applied, and outputs on oscillation detection from the sensors are inputted precisely and correctly. Then, signals for correcting noises resulting from movement of the doors 2 and 4 are generated easily while low-frequency noises in large amplitude arising from temperature drift and the like are eliminated. Thereby, an automatic door device that is highly reliable and excellent in safety can be obtained. |
