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为解决偏远地区小电流接地选线系统的数据传输问题,提出了基于GPRS技术的小电流接地选线系统通信解决方案。先介绍了SonyEricsson公司研制开发的GPRS模块GR47,并以GR47模块为核心,以相应单片机为控制器,分别设计了GPRS远端模块和中央模块。为了保证发送/接收数据的正确性,采用了CRC校验方法;为了保证数据的安全性,对所传输的数据采取了严格的加密措施,每帧数据所采用的加密算法是不确定的,完全是由一个随机数来确定,在较大程度上保证了数据的安全性。然后介绍了GPRS远端模块、GPRS中央模块的硬件电路设计、主要程序流程图以及各模块的开发流程。经过实际测试,在数据的传输速率、数据的误码率以及系统建立连接等方面均达到了设计要求,测试证明GPRS技术完全可以应用在小电流接地选线系统中。
In order to solve the data transmission problem of the small current grounding line selection system in remote areas, a communication solution of the small current grounding line selection system based on GPRS technology is proposed. First introduced the SonyEricsson GPRS module developed by the company GR47, and to GR47 module as the core, with the corresponding microcontroller as the controller, respectively, designed the GPRS remote module and the central module. In order to ensure the correctness of sending / receiving data, a CRC checking method is adopted. In order to ensure the security of the data, the transmitted data is strictly encrypted, and the encryption algorithm used in each frame of data is indefinite and completely Is determined by a random number, to a large extent, to ensure data security. Then introduces the GPRS remote module, GPRS central module hardware circuit design, the main program flow chart and the module development process. After the actual test, it meets the design requirements in terms of data transmission rate, data error rate and system connection establishment. The test proves that GPRS technology can be fully used in the low current grounding line selection system.