08-06-2013, 03:36 PM
HIGH LEVEL SECURITY SYSTEM FOR OPENING THE DOOR USING MEMS TECHNOLOGY
HIGH LEVEL SECURITY.doc (Size: 22 KB / Downloads: 33)
MEMS TECHNOLOGY.doc (Size: 1.17 MB / Downloads: 61)
HIGH LEVEL SECURITY SYSTEM.pptx (Size: 104.69 KB / Downloads: 44)
ABSTRACT
The system is aimed to provide privacy protection, such that unauthorized persons cannot open the door under any circumstances. This kind of automated door with top secret code can be implemented at important places where high level security is essential. For example strong rooms, personal labs, etc. Most of the security systems those offers password protection is quite common these days, in some places scratch cards or RFID cards are used to identify the users, but all these techniques are became very old, people are looking for new methods, and there by this project work is designed which creates some enthusiasm while decoding the code through MEMS technology.
MEMS is the device often used as position displacement sensor and the applications of MEMS are plenty. To prove, one proto type system is practically designed to control a sliding door mechanism as a security application. Micro Electro Mechanical Systems (MEMS) is the integration of the mechanical elements, sensors, actuators, and electronics on a common silicon substrate through micro fabrication technology. The broadest requirement for these very small devices is ability to sense the environment, to collect necessary data and to create a signal or action to make desired changes to the environment.
The concept is to move or rotate the MEMS device in a sequence through the hand like a key is rotated. When the MEMS is moved at certain angles, voltage variations are produced depending on the angle of rotation or movement. Slight variation in the X, Y, or Z – axes gives us the voltage variation that is fed to the ADC and the digital information is fed to the micro controller. Only authorized persons will know in which direction and to what angle the MEMS is to be moved or rotated. In addition, these angles should be activated in a sequence then only the door will be opened. If the sequence is wrong, door will not be opened & alarm will be raised for a moment. The demo module is constructed with a sliding type of door mechanism and it will be driven through a reduction gear DC motor. Wooden plank is used to simulate the wall which holds the sliding door mechanism. The voltages from the MEMS are fed to the ADC for converting into digital information and this digital data is fed to the micro controller for decoding the code generated by the MEMS module. Once the code is matched, the controller drives the DC motor through a driving circuit to open the door. And the passing person is sensed by a set of IR sensors placed on the other side of the door. When the sensor is interrupted, a signal is given to the controller by which the DC motor is driven in the reverse direction by the micro controller to close the door.