无线车检器的接收设备研制

发布时间：2019-05-28 11:24

【摘要】：当前我国城市交通面临着巨大压力，导致交通管理难度增大，交通现状急需改变。改变交通现状的首要前提就是要能够及时掌握实时交通信息，无线车检器在十字路口处采集车流量、车辆占有时间等交通数据，能够及时掌握实时交通信息。在无线车检器中，接收机设备接收来自传感器节点的原始数据包，并对数据包解析，，将分析得出的交通信息发送至控制中心，给控制中心提供重要的数据源。所以设计一套能够精确并且稳定工作的接收机设备就显得尤为重要。接收机的设计重点是精确接收来自传感器节点组的数据并对数据解析，接收机与传感器节点组之间的数据传输方式采用无线传输，在保证数据传输精确的前提下，减少了接收机在实际环境中安装调试的工作量；接收机采用单片机作为核心控制器，满足系统对控制器的计算量要求；考虑到接收机与控制中心之间的实际距离较远，为了降低误码率，接收机与控制中心之间的数据传输方式采用有线方式。为了保证接收机的稳定工作，需要设计配套的测试设备对接收机进行各种条件下的测试。忽略接收机内部功能结构，接收机的输入为传感器节点组发送的数据包，输出为向控制中心发送的数据包。测试设备模拟传感器节点组发送数据包作为接收机的输入，并将接收机的实际输出与期望输出做比对，判断接收机是否合格。从硬件功能和软件功能两个主要的方面进行系统方案设计，并完成实现接收机和接收机测试设备；将设计完成的接收机和接收机测试设备进行实际使用，接收机能够接收来自传感器节点的数据包并对数据包做出正确解析，测试设备能够反映出接收机对数据包的识别、解析能力。
[Abstract]:At present, the urban traffic in our country is facing great pressure, which leads to the difficulty of traffic management, and the traffic situation needs to be changed urgently. The first premise to change the traffic situation is to be able to master the real-time traffic information in time, the wireless vehicle inspector can collect the traffic data such as traffic flow and vehicle occupation time at the crossing, and can master the real-time traffic information in time. In the wireless vehicle inspector, the receiver device receives the original data packet from the sensor node, and parses the packet, sends the analyzed traffic information to the control center, and provides the control center with an important data source. Therefore, it is particularly important to design a set of receiver equipment which can work accurately and stably. The design of the receiver focuses on the accurate reception of the data from the sensor node group and the analysis of the data. The data transmission mode between the receiver and the sensor node group is wireless. On the premise of ensuring the accuracy of the data transmission, The workload of installing and debugging the receiver in the actual environment is reduced. The receiver uses single chip microcomputer as the core controller to meet the requirements of the system for the calculation of the controller. Considering the distance between the receiver and the control center, in order to reduce the bit error rate (BER), the data transmission mode between the receiver and the control center is wired. In order to ensure the stable operation of the receiver, it is necessary to design a supporting test equipment to test the receiver under various conditions. Ignoring the internal functional structure of the receiver, the input of the receiver is the packet sent by the sensor node group, and the output is the packet sent to the control center. The test equipment simulates the sensor node group to send packets as the input of the receiver, and compares the actual output of the receiver with the expected output to determine whether the receiver is qualified or not. The system scheme is designed from two main aspects of hardware function and software function, and the receiver and receiver test equipment are realized. The designed receiver and the receiver test equipment are used in practice. The receiver can receive the packet from the sensor node and analyze the packet correctly, and the test device can reflect the recognition of the packet by the receiver. Analytical ability.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN851;U495

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