基于GPS和GPRS的城市公交智能终端系统设计
发布时间：2018-12-13 09:46
【摘要】：本文设计了一款基于GPS和GPRS的城市公交智能终端系统,用于实现公交车辆实时定位跟踪、自动语音报站、无线数据通讯、远程配置、客流量统计、车辆安全报警以及信息实时显示等功能。 通过对常用的51系列芯片和华邦公司的W77E058芯片进行详细的对比和分析,本文选择指令运算速率更快,片上资源更加丰富,并且具有两个全双工串口的W77E058作为系统的主控芯片,完成对车辆GPS定位信息的采集与解析以及执行与后台调度中心的数据通信功能；采用了U-BLOX公司的NEO-5Q芯片作为系统的GPS模块,实现车辆的定位信息采集,并通过设计相关软件完成对GPS信息的解析；通过对国内车载终端控制系统与后台调度中心的通讯方式进行广泛的调研,最终选用当今技术成熟、应用范围广阔的GPRS无线网络实现终端系统与调度中心的无线通讯,系统采用SIMCOM公司的SIM900模块作为GPRS通讯模块,通过AT指令实现终端系统的入网配置以及数据传输,并设计了数据通信协议,实现了终端系统与调度中心的全双工数据通讯以及文件的透明传输；提出了一种基于“地理门槛”的站点识别算法,介绍了地理门槛算法对站点的识别原理,并给出了该算法的实现过程,最后通过实验测试,证明了该算法可以有效地解决传统站点识别算法在站点识别域存在相互影响的条件下对站点识别存在错报漏报的情况；采用TTS语音合成技术,使得自动报站语音更加流畅自然。 除了上述功能,本文还对客流量统计模块、液晶显示模块、手动按键模块、数据存储模块进行了详细设计,给出了各模块详细的软硬件设计方案。最后通过对各个子模块以及整个系统在实验室进行联合测试。从测试的结果可以得出,终端系统达到了最初的设计要求。
[Abstract]:This paper designs an intelligent terminal system of urban public transportation based on GPS and GPRS, which is used to realize real-time location and tracking of public transport vehicles, automatic voice reporting station, wireless data communication, remote configuration, passenger flow statistics, etc. Vehicle safety alarm and information real-time display and other functions. Through the detailed comparison and analysis of 51 series chips and W77E058 chips of Huabang Company, this paper chooses the W77E058 with two full-duplex serial ports as the main control chip of the system, which is faster in operation speed, more abundant in the on-chip resources, and has two full-duplex serial ports. Complete the acquisition and analysis of vehicle GPS positioning information and the implementation of the data communication function with the background dispatching center; The NEO-5Q chip of U-BLOX Company is used as the GPS module of the system to realize the vehicle positioning information collection, and the analysis of the GPS information is completed by designing the related software. Through the extensive investigation of the communication mode between the domestic vehicle terminal control system and the background dispatching center, the wireless communication between the terminal system and the dispatching center is realized by the GPRS wireless network, which has mature technology and wide application scope. The system adopts the SIM900 module of SIMCOM Company as the GPRS communication module, realizes the terminal system configuration and data transmission through AT instruction, and designs the data communication protocol. The full duplex data communication between the terminal system and the dispatching center and the transparent transmission of files are realized. In this paper, a site recognition algorithm based on geographical threshold is proposed, and the principle of site recognition based on geographical threshold algorithm is introduced, and the realization process of the algorithm is given. Finally, the algorithm is tested by experiments. It is proved that this algorithm can effectively solve the problem of misreporting and underreporting of the traditional site identification algorithm under the condition of the mutual influence of the site identification domain. Adopt TTS speech synthesis technology, make automatic report station voice more smooth and natural. In addition to the above functions, this paper also gives a detailed design of the passenger flow statistics module, liquid crystal display module, manual keystroke module, data storage module, and gives the detailed hardware and software design scheme of each module. Finally, each sub-module and the whole system are tested in the laboratory. From the test results, it can be concluded that the terminal system meets the initial design requirements.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;U491.17
本文编号：2376337
[Abstract]:This paper designs an intelligent terminal system of urban public transportation based on GPS and GPRS, which is used to realize real-time location and tracking of public transport vehicles, automatic voice reporting station, wireless data communication, remote configuration, passenger flow statistics, etc. Vehicle safety alarm and information real-time display and other functions. Through the detailed comparison and analysis of 51 series chips and W77E058 chips of Huabang Company, this paper chooses the W77E058 with two full-duplex serial ports as the main control chip of the system, which is faster in operation speed, more abundant in the on-chip resources, and has two full-duplex serial ports. Complete the acquisition and analysis of vehicle GPS positioning information and the implementation of the data communication function with the background dispatching center; The NEO-5Q chip of U-BLOX Company is used as the GPS module of the system to realize the vehicle positioning information collection, and the analysis of the GPS information is completed by designing the related software. Through the extensive investigation of the communication mode between the domestic vehicle terminal control system and the background dispatching center, the wireless communication between the terminal system and the dispatching center is realized by the GPRS wireless network, which has mature technology and wide application scope. The system adopts the SIM900 module of SIMCOM Company as the GPRS communication module, realizes the terminal system configuration and data transmission through AT instruction, and designs the data communication protocol. The full duplex data communication between the terminal system and the dispatching center and the transparent transmission of files are realized. In this paper, a site recognition algorithm based on geographical threshold is proposed, and the principle of site recognition based on geographical threshold algorithm is introduced, and the realization process of the algorithm is given. Finally, the algorithm is tested by experiments. It is proved that this algorithm can effectively solve the problem of misreporting and underreporting of the traditional site identification algorithm under the condition of the mutual influence of the site identification domain. Adopt TTS speech synthesis technology, make automatic report station voice more smooth and natural. In addition to the above functions, this paper also gives a detailed design of the passenger flow statistics module, liquid crystal display module, manual keystroke module, data storage module, and gives the detailed hardware and software design scheme of each module. Finally, each sub-module and the whole system are tested in the laboratory. From the test results, it can be concluded that the terminal system meets the initial design requirements.
【学位授予单位】：东北林业大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495;U491.17
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