| 摘要 |
PURPOSE:To make it possible to easily judge whether or not the surroundings or the influences of a door closing mechanisms is within an allowable range by attaching means for manually setting a higher level than a preset sensitivity to a proximity detector having a preset detecting sensitivity. CONSTITUTION:The output 15a of a sensitivity interchanging circuit 15, which is composed of a comparator voltage 16, a changeover switch 19 and resistors 17 and 18, normally assumes the voltage V1 of the comparator voltage 16. When a stranger approaches an anttena 1 or 2, a voltage comparator circuit 13 operates to drive a relay 14. The switch 19 changed to the terminal B, and the value V1 of the comparator voltage 16 is divided by the resistors 17 and 18 to generate an allowable voltage level V2, which is turned to the output 15a by repeating the opening and closing operations of the door. In accordance with these operations, it is possible to obtain easily the measure for setting the balance of AC bridge and the propriety for the adjustment of the door mechanism. |
