汽车智能仪表虚拟测试系统研究与开发..doc

汽车智能仪表虚拟测试系统研究与开发 摘 要 当前，汽车仪表的检测模式不能满足汽车仪表生产厂家对仪表成品智能化检测标定日益增长的需要，以致仪表生产水平普遍落后于整车生产水平，为了解决这个问题，本文以汽车智能仪表为检测对象，基于虚拟仪器技术，研究开发了一种汽车智能仪表虚拟测试系统。 本文在研究汽车智能仪表虚拟测试系统工作原理、总体框架的基础上，研究开发了该系统的软硬件子系统。该系统的硬件功能采用NI PCI-6014数据采集卡和PC机来实现，软件功能采用NI公司的LabVIEW图形化编程语言来实现。软硬件采用同一个公司的产品，可以减少由于不兼容对测试系统造成的干扰。最后，采用数字合成信号发生器来模拟被测试信号，对汽车智能仪表虚拟测试系统进行试验，证明该系统的正确性和可靠性。 该测试系统能对汽车智能仪表的车速表、转速表、燃油表、冷却液温度表、机油压力报警五个对象的功能和精度进行检测。用户只需输入初始化参数，将传感器的信号采集到虚拟测试系统，系统就可以实现对数据的分析、处理、显示、存储等功能，并可以判断对应仪表是否合格。该测试系统具有美观、便捷的人机交互主界面，方便、快捷的操作界面，直观的数据显示界面，极大地方便了用户的操作。在测试模块功能的实现上，采用“状态机”模式，使各测试模块能独立运行，互不干扰。并且，该测试系统具有可移植性好，升级方便的特点。 关键词：汽车；智能仪表；虚拟测试系统ABSTRACT The current testing modes of motormeter can’t meet the growing needs of which motormeter manufacturers about the products intelligent test and calibration, so that the instrument production’s level is lower than the level of vehicle production. In order to deal with this problem, this topic choose the automobile intelligent instrument as the test object, based on the virtual instrument technology, to develop a virtual test system of automobile intelligent instrument. Based on the work principle and the general framework of the the vehicle intelligent instrument virtual test system, this paper developed the system’s hardware and software subsystem. This system adopted NI PCI-6014 data acquisition card and PC to realize the hardware function and adopted the NI’s LabVIEW graphical programming language to realize the software function. Both the hardware and software used the same company’s products can reduce the interference caused by incompatible.At last, adopted the digital signal generator to generate the signal which is in need. And then, to prove the system’s validity and reliability, sent it to the instrument virtual test system. This system can test the function and precision of the intelligent instrument’s speedometer, revolution meter, fuel gauge, coolant temperature gauge, and oil pressure. Users only need to input the initialization parameters and