车灯自动检测系统的设计与实现

发布时间：2018-05-10 15:29

本文选题：自动测试系统 + 光电参数　；参考：《电子科技大学》2016年硕士论文

【摘要】：车灯作为汽车上的主要光源,在行车安全中发挥着非常重要的作用。为了保证车灯的质量,需要对车灯的发光强度、电流和电压等光电参数进行测试。随着汽车电子技术的快速发展,CAN/LIN总线协议已经广泛应用在汽车网络中,车灯的工作主要通过总线方式进行控制,为了保证车灯能够与ECU(Electronic Control Unit)通讯,还需要对车灯CAN/LIN通讯接口进行检测。因此在车灯出厂之前对车灯进行测试的需求十分迫切。本文根据车灯的测试需求,结合自动测试系统的设计思想,以LAN、USB和RS232接口的测试仪器搭建了车灯自动检测系统。该系统能对某厂商生产的车灯进行整灯功能测试,软件的功能主要包括用户管理、仪器自检、缺省参数配置、车灯光电参数及总线通讯接口测试以及数据处理。用户管理可添加用户、删除用户和修改用户,确保了软件使用的安全性;仪器自检实现上位机与测试仪器之间的通信,读取仪器的工作状态信息,判断连接状态和自检状态;缺省参数配置是对测试案例中所使用到的仪器按照缺省参数配置,确保仪器能根据测试项目正确使用。车灯光电参数及总线通讯接口测试主要完成输入电压测试、输入恒流测试、输入冲击电流测试、组合逻辑测试和CAN/LIN通讯接口测试;数据处理是将所测试的数据保存到MySQL数据库中,并能根据用户模板、测试条目、测试结果自动生成测试报告。本测试系统的测试对象是车灯整灯,对每个测试对象进行的所有测试步骤组成一个测试案例,在进行测试时,直接调用测试案例配置文件自动对车灯进行测试。文中首先根据车灯的测试需求,确定了系统的测试技术参数和测试方法,并对CAN/LIN总线协议进行了介绍,提出了测试系统的总体方案,确定了测试系统的系统架构和软件设计方案,然后对软件的测试流程进行了分析讨论,并对所开发的测试软件进行了功能验证,最后对该系统的工作进行了总结与展望。
[Abstract]:As the main light source of the car, the vehicle lamp plays a very important role in the traffic safety. In order to ensure the quality of the car lights, the photoelectric parameters such as the light intensity, current and voltage of the lamp are tested. With the rapid development of automotive electronic technology, the CAN/LIN bus protocol has been widely used in the automobile network and the work of the car lamp. It is mainly controlled by bus mode. In order to ensure that the lamp can communicate with ECU (Electronic Control Unit), it also needs to test the communication interface of the vehicle lamp CAN/LIN. Therefore, it is very urgent for the lamp to be tested before the lamp is out of the factory. In this paper, the design idea of the automatic test system is combined with the design idea of the auto test system, and LAN is used in this paper. The test instrument of USB and RS232 interface sets up the automatic detection system of car lamp. This system can test the light function of the lamp produced by a manufacturer. The function of the software mainly includes user management, the self inspection of the instrument, the configuration of the default parameters, the photoelectric parameters of the car lamp and the bus communication interface test and the data processing. The security of the software is ensured by the user and the revision of the user. The instrument self checks the communication between the host computer and the test instrument, reads the working state information of the instrument, and judges the connection state and self-examination state. The default parameter configuration is to configure the instrument used in the test case according to the default parameters and ensure that the instrument can be tested according to the test. The project is used correctly. The photoelectric parameters and bus communication interface test mainly complete the input voltage test, input the constant current test, the input shock current test, the combined logic test and the CAN/LIN communication interface test. Data processing is the data stored in the MySQL database, and can be based on the user template, test items, test results. The test object of the test system is the lamp whole lamp, and all the test steps of each test object are composed of a test case. In the test, the test case configuration file is directly invoked to test the car lamp. First, the test technology of the system is determined according to the test demand of the car lamp. The parameters and test methods are introduced, the CAN/LIN bus protocol is introduced, the overall scheme of the test system is put forward, the system architecture and software design scheme of the test system are determined. Then the test flow of the software is analyzed and discussed, and the test software is validated. Finally, the work of the system is carried out. Summary and prospect.

【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.651

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