RFID Keyfob Application Principle Of RFID Technology

With the development of information technology, we often use a variety of digital identification cards in our daily lives, such as credit cards, calling cards and financial IC cards. Most of the identification card, are contact with the card reader for the connection to read digital data, the common method of magnetic stripe card or IC chip fixed-point contact, these contact with the way to identify digital data, easy to use in the long-term Due to wear caused by data to determine the error, and contact identification card has a specific contact, the card has direction, the user often due to improper operation and can not correctly interpret the information.

Radio frequency identification system of the English name for the Radio Frequency Identification System, referred to as RFID. And RFID is for the commonly used contact recognition system to improve the shortcomings of the use of radio frequency signals to wireless transmission of digital data, so the identification card does not have to contact with the card reader can read and write digital data, this non-contact RF status Identification card and card reader between the non-directional requirements, and the card can be placed in the pocket, purses, do not have to be taken out and can directly identify, eliminating the modern people often from a few cards to find a particular card trouble.

Analog transmission and storage costs on the other hand, video security monitoring has recently been widely used in daily life. The traditional surveillance system is based on analog signals to do image processing and transmission, from multiple cameras to shoot the image in accordance with the order in advance order, the captured video periodically broadcast on the monitor. Because of the large amount of video data, the cost of transmission and storage is quite high, and because of the difficulty of adding intelligent data management and event detection capabilities, the application flexibility is very low. As the system can not provide automatic event detection and warning function, the monitoring staff must be one by one to monitor the video to determine whether the incident and make the appropriate response. This approach has several shortcomings:

1, the monitoring efficiency is low: the face of a large number of monitors, the monitoring staff must spend a lot of energy and time, one by one to check the video on each monitor.

2, prone to loss: the general monitoring staff can not at the same time, all the surveillance video to check. So when the monitoring staff's concentration is dispersed in the view of multiple video conditions, it will be easy to miss the occurrence of the incident, and not at the best time to make the right response.

3, the high cost of equipment: each video source must have a display device with it to play a role in a large number of video sources under the conditions, you will need a lot of display devices. In addition to the video certificate will also spend a lot of storage equipment, making a substantial increase in system costs.

Digital monitoring is highly identifiable and multi-faceted

A new generation of video security monitoring system combines digital video processing and network transmission and other new technologies and have many advantages. For example, digital video compression can be stored in an efficient way to monitor video, can significantly reduce the required network transmission bandwidth and data storage space,

The digital image enhancement algorithm can be used to enhance the quality of video, making it possible to provide clear video quality for identification in poor lighting conditions; video streaming and instant video networks provide high flexibility and (Such as personal computers, Internet computers, mobile phones, wireless handheld devices and PDAs, etc.), through a variety of different network platforms, using a variety of information access devices (Such as wired and wireless regional networks, cable networks and telephone networks, etc.) to watch surveillance video. This kind of network video security monitoring system has a lot of potential applications.

For example, a user can watch a nanny or a child or an old person at home in the office via the Internet. It can also monitor whether the home or office has a thief to sneak into, and automatically detect whether there is a fire, family members fall and so on. Or the video security monitoring system used in access control management, to help keep the integrity of the identification of access personnel. It can also be used to monitor the status of major road traffic to improve traffic conditions and the safety of transport and to monitor and record traffic accidents and car accidents.


 

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