In high-end apartments, we can already see traces of inductive IC cards (also called contactless IC cards), rapid development of inductive IC card technology, and a new generation of intelligent electronic door locks based on inductive IC card technology. Came into being. Since the inductive intelligent electronic door lock has no mechanical contact during use and no friction occurs, the wear of the proximity card and the intelligent electronic door lock can be reduced, and the failure rate of the intelligent electronic door lock can be reduced.
However, the disadvantages of the inductive intelligent electronic door lock system are still many. What needs to be solved in terms of security is to prevent the proximity card from being copied illegally and unlocked in unusual ways (such as tools dialing, picking, and pulling with a strong magnet, etc.), and the lock body should have a certain ability to resist external damage. In order to prevent the proximity card from being copied illegally, each proximity card is usually encrypted before leaving the factory. Different users use different passwords. The issuance management software is also protected by passwords to prevent unauthorised personnel from illegally using the issuance management software. Due to the use of a three-lock anti-lock cylinder, when the laboratory door is closed, the anti-lock lock is pressed by the door frame and automatically locks the main lock, making it impossible to use tools to open or split. In addition, the motor-driven clutch mechanism has an anti-strong magnet pull-in function, and there is no nail on the lock body before the door lock can be removed.
The reliability of the inductive intelligent electronic door lock system is also very important. At present, the comprehensive reliability of the system can be improved by both hardware design and software design. In terms of hardware, the selected host processor, PIC16F73, has high anti-jamming capability and internally contains a watchdog (WDT) circuit with an independent RC oscillator that can automatically reset the CPU when the program runs away. Normal operation; adopt hardware write protection measures for EEPROM storing important data to avoid data loss in the event of interference; use patch components as much as possible and strictly perform aging screening to ensure component quality; in terms of PCB layout, take a series of measures to improve resistance Interference ability.
However, the disadvantages of the inductive intelligent electronic door lock system are still many. What needs to be solved in terms of security is to prevent the proximity card from being copied illegally and unlocked in unusual ways (such as tools dialing, picking, and pulling with a strong magnet, etc.), and the lock body should have a certain ability to resist external damage. In order to prevent the proximity card from being copied illegally, each proximity card is usually encrypted before leaving the factory. Different users use different passwords. The issuance management software is also protected by passwords to prevent unauthorised personnel from illegally using the issuance management software. Due to the use of a three-lock anti-lock cylinder, when the laboratory door is closed, the anti-lock lock is pressed by the door frame and automatically locks the main lock, making it impossible to use tools to open or split. In addition, the motor-driven clutch mechanism has an anti-strong magnet pull-in function, and there is no nail on the lock body before the door lock can be removed.
The reliability of the inductive intelligent electronic door lock system is also very important. At present, the comprehensive reliability of the system can be improved by both hardware design and software design. In terms of hardware, the selected host processor, PIC16F73, has high anti-jamming capability and internally contains a watchdog (WDT) circuit with an independent RC oscillator that can automatically reset the CPU when the program runs away. Normal operation; adopt hardware write protection measures for EEPROM storing important data to avoid data loss in the event of interference; use patch components as much as possible and strictly perform aging screening to ensure component quality; in terms of PCB layout, take a series of measures to improve resistance Interference ability.
Release Date:2009/7/22 14:15:46
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