| 摘要 |
PURPOSE:To open and close a door securely by receiving the electric wave when a person carrying a discriminating member to transmit a specific discriminating electric wave approaches the door, comparing it with a registered code, and opening the door when the both codes are coincident. CONSTITUTION:A discriminating member 2 which consists of a nonvolatile memory chip 13 housing a discriminating code, and an electromagnetic coil 14 to transmit the discriminating code through radio is provided, and a person who has got the permission to enter and exit carries the discriminating member 2. And when a person approaches a door 5, the electric wave is received through an antenna 3, and converted to a discriminating code by a reading head 17. Then, the code and a registered code stored in a memory 18 beforehand are com pared, and when they are coincident, a power is applied to an opening/ closing driving circuit of the door 5 to open the door. And after the person passes, the door is closed by using a perceiving sensor 21, a timer, or the like. Consequently, the passer can be discriminated securely without contacting, and an accurate and sanitary opening and closing of door can be carried out in an operation room in a hospital, a pharmacy, and the like. |
