导　　师： 谢胜利

学科专业： 081104

授予学位： 硕士

作　　者： ;

机构地区： 广东工业大学

摘　　要： 在现代物流装备中车载传感系统是整个物流车辆运输管理系统的核心环节,起着重要的作用。目前我国广泛使用的车载传感系统存在系统设备运行不稳定、更换困难以及安全可靠性较低等一系列的问题。因此,研究一种用于物流车辆在途状态实时监测的低功耗无线传感系统节点设备,具有非常重要的意义。 基于Zigbee的车载无线传感系统节点设计,采用无线传感器技术结合Zigbee低功耗设计理念,一方面能大大的降低系统成本,另一方面解决了传统车载系统设备运行不稳定、维护困难等问题。多种传感器协同工作,在设计方面遵循了通用性原则,保证了数据采集的全面性和实时性；数据传输方面,通过信号通透性增强策略,确保无线数据传输的安全和可靠。本文研究工作主要包括以下几个方面： 1/)系统方案设计。通过分析现有车载系统存在的问题,制定了车载无线传感系统节点设计的整体方案,实现了物流车辆在途状态的实时监测。 2/)通用性设计。针对车辆各类物理状态、传感器信号,从硬件方面设计适用于多类型传感器数据处理的节点设备,同时为了方便节点设备参数的配置开发了上位机配置软件,提高了节点设备的通用性。 3/)低功耗研究。硬件方面通过控制电路的设计使节点设备能够控制传感器的电源及接口通断,同时软件设计采用具有低功耗优势的Zigbee技术,结合其休眠机制,实现传感器数据的周期性采集发送,使节点设备能耗降低至0.23mAh左右,理论上两节容量为1000mAh的于电池即可供其正常工作一年以上的时间。 4/)稳定性研究。采用设立中继路由节点的方式,配合Zigbee技术提供的网络重连机制,制定了相应的数据通信协议,以确保无线数据传输的安全性和准确性。 最后,通过对车载无线传感系统节点设备的软硬件功能测试,验证了所设计的节点设备满足在能够实时监测物流车辆在途状态的基础上具备低功耗、操作方便、安全可靠、通用性强等特点的设计要求。 In the modern logistics equipment, vehicle-mounted sensor system plays an important role in the logistics vehicle transport management system. There are lots of problems on the vehicle-mounted sensor system widely used in China, such as the unstable equipment running, difficult replacement, low security and reliability. Therefore, it makes sense to research a low-power wireless sensor system node equipment for the real-time monitoring of logistics vehicle status in transit. The design of vehicle-mounted wireless sensor system node based on Zigbee has a design concept of combining wireless sensor technology and Zigbee low power consumption. This design not only can greatly reduce the system costs but also can solve the unstable running and difficult maintenance problems on the traditional vehicle system equipment. Following the principle of universality in design, various sensors working together makes sure the comprehensiveness and real-time of data acquisition. In the data transmission aspect, it ensures the security and reliability of wireless data transmission via signal permeability enhancement strategy. The research works include the following aspects: 1/) System Design. By analyzing the problems of existing vehicle-mounted systems, the whole scheme formulation of vehicle-mounted wireless sensor system node is established, and the real-time monitoring of logistics vehicles status in transit is achieved. 2/) Versatility Design. For various physical state of vehicles and sensor signals, the node equipment which is suitable for the multi-sensor data processing is designed from the aspect of hardware. Meanwhile, the upper computer configuration software is developed for the node equipment parameters configuration, which increases the versatility of node equipment. 3/) Low-Power. From the hardware aspect, the node device can control the power and interface on-off of the sensor by the well-designed control circuit. In the software design, due to various advantages of Zigbee technology, such as low power consumption and dormancy mechanism, the node device can achieve the periodically acquisition and sending of sensor data. Based on these methods, the node equipment reduces the energy consumption below0.23mAh. In theory, two batteries with the capacity of1000mAh are enough to supply system working properly for one year. 4/) Stability. Using a relay routing node equipment, combined with the network reconnection mechanism provided by Zigbee technology, corresponding data communication protocol is developed to ensure the safety and precision of wireless data transmission. Finally, the design requirements of node equipment are verified by the test of vehicle-mounted wireless sensor system node. On the basis of the real-time monitoring of logistics vehicle status, it has features of low power consumption, convenient operation, safe reliability and high universality.

关 键 词： 车载系统 无线通信 传感器数据采集 低功耗

分 类 号： [TN92 TP212.9]

领　　域： [电子电信] [电子电信] [自动化与计算机技术] [自动化与计算机技术]