| 摘要 |
<p>#CMT# #/CMT# The device has a sensor (4) connected to an electric supply and processing unit and constituted of two electrically conductive layers of thermoplastic or thermosetting resin. Each layer is connected to a power supply source. An insulating layer is disposed between the conducting layers. The sensor is inserted between a door frame (3) and a door leaf (2). The sensor presents in the form of a magnetic strip, and the processing unit receives the information e.g. variation in the capacity of the strip, to determine the type of entry on a door. #CMT#USE : #/CMT# Used for detecting an attempt of forcible entry through a door leaf mounted movably with respect to a frame of door (claimed) such as access door of a building or motor vehicle, roller shutter, and trap door. #CMT#ADVANTAGE : #/CMT# The electric supply and processing unit receives the information e.g. variations in the capacity of the strip, from the strip, thus increasing the sensitivity of the device and detecting all type of entries on the door with reduced cost. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a front view of a door equipped with a magnetic strip. 2 : Opening frame 3 : Door frame 4 : Sensor #CMT#POLYMERS : #/CMT# The electrically conducting layers are made of thermosetting resin e.g. polyester, epoxy resin and thermoplastic resin e.g. polyethylene, polypropylene, polyamide and PET.</p> |
