Design On Substation System Based On RFID

At present,coal mine production safety situation was very serious,the state is trying hard to control coal mine safety production environment,in order to effectively improve the station of coal production.,which need to strengthen the pregulation of worker and mobile devices,so that managers can promptly and clearly to know who works underground,where is the worker now,the location of mobile devices and so on.As a result of radio communications technology and the application of technology to the field of mine safety in the transfer of the limitations of social forces,the original mine-power wireless communication products need more power,but which provide less rate,at the same time,a few card read,poor reliability and Large size is not easy to carry and other issues,it is difficult to use a large number of equipment to the coal mine.In order to effectively manage the location,as well as more staff,it is necessary to establish the substation of card reader to connect more readers.Which can be very good at effectively locked within the scope of the location of personnel to detect the movement of personnel.The main work of this paper is as follows:Design on substation system of card reader.The substation system of card reader includes four main parts,such as ID card,card reader,substation of card reader and monitor.Transmission system is achieved through RS485 bus.Substation gets position information of ID card from the card reader though transmission system,then upload information to the monitor through the bus.The worker who in charge of monitor analyze ID card information,can promptly get the the information of underground staff's position.These ID cards in this system are all active RFID tags,which sending the location information of mine workers by RFID technology.The ID card guarantee working last for three years at lest thanks to the low-power technology;the card reader receives position information of ID card through the wireless receiver,and which is equipped with a time chip can provide real-time position information of the ID card;the substation are equipped with high-capacity external RAM and external FLASH, external RAM provide cache for a large amount of data,the external RAM keep the information of card by the information of card reader address,high-capacity external FLASH card in addition to preserve position information,but also to analyze card information,to preserve the information of card of off-line and instable at another place,to achieve more intelligent management;the host software of monitor can preserve data of ID card,card reader and substation.The practical application of system proves that design are reasonable.the system in the operation performs its stability,which expand the scope of monitor,achieve the design requirements.