Design Of Eletronic Lock In The Logistics Monitoring And Controlling System Of Customs

With the development of Chinese economy and the increasing of Chinese international trade, The quantity of cargoes going through Customs ports is increasing. Under the instruction of the "Going through customs greatly" strategic concept brought forward by the State Council, the Customs authority has explored many new working modes, such as "going through Customs formalities at nearby ports" and "establishing green way between the logistics center and the Customs ports". These working modes facilitate the handling of Customs formalities, fasten the moving speed of the cargoes on Customs ports, at the same time, they set a higher request to the Customs logistics monitoring and controlling system. Taking the monitoring and controlling system as the background, this paper launches the research on a king of smart electronic lock, which is designed by the combination of satellite positioning technology, wireless communication technology, embedded software technology and some information security strategies. Main research achievements is as bellows:According to the design needs of the electronic lock, the overall technical blue print is studied. The GPS technology, GSM/GPRS technology and RFID technology is integrated in the electronic lock, so it has the function of accurately positioning, remote real-time data transferring and rapid identification.The hardware system of the electronic lock is realized by taking the embedded microprocessor ARM as the core. The development and design of electronic lock hardware platform, Motor-driven circuit, memory interface circuit, positioning and communication interface module have been finished.The software design of the electronic lock has been finished. Considering the specific application background of the electronic lock, the overall idea of the software design was raised, the communication protocols of the application layer were designed. Using the idea of multi-thread , message queue, semaphore of the embedded multi-task operating system, the data collection, data communication, data storage and command processing software function has been finished.The research on the information security of the electronic lock has been done. An encryption algorithm fit for the hardware and software condition of the electroniclock has been chosen considering security level and the Calculation speed. By analyzing the security mechanisms of the GSM network, an information security strategy that combines the Encryption algorithm and security mechanisms of the GSM network has been raised. The ability of resisting attacks has been analyzed according to the raised security strategy.After tested by practice, the electronic lock has met the request of the Customs logistics monitoring and controlling system, it can realize the dynamic real-time monitoring and controlling towards the Customs logistics process. The electronic lock works stability with a high security level, it has met the design needs.