大学毕业论文—基于labview的增压压力传感器检测试验台测控系统设计.docVIP

摘 要 增压压力传感器是一种绝对压力传感器，它是汽车发动机电控单元用于的重要元器件。其作用是将涡轮增压器后方空气的绝对压力转化为电信号，发送给电控单元（ECU），电控单元将此电信号与根据发动机工况得出的理论增压压力作比较，不断调节涡轮增压器以使增压达到最佳。可见增压压力传感器质量精度等性能的好坏对汽车发动机能否达到最佳工作状态有着很大的影响，故而有必要对企业所生产的增压压力传感器产品性能进行评估检测。 本课题的研究内容是增压压力传感器检测试验台测控系统的设计（主要任务是测控系统的软件设计）。本论文采用虚拟仪器技术，以LabVIEW为平台，结合增压压力传感器特点，开发了一套计算机测试系统。介绍了增压压力传感器测试系统的硬件设备组成及相关原理， 具体地说，本论文的主要工作有以下几个方面：虚拟仪器技术与LabVIEW；2；3.基于LabVIEW的增压压力传感器试验平台的硬件及软件设计；4.系统测试及结论。 关键词：增压压力传感器，，LabVIEW， ABSTRACT The supercharging pressure sensor, also know as the absolute-pressure senor, is a important component of electronic control unit on the automotive engine for real-time monitoring turbocharger boost pressure. It can transform the absolute-pressure of air behind the turbocharger into electrical signals which would be sent to the electronic control unit(ECU).Electronic control unit compares this electrical signal with the theory supercharging pressure resulted from engine operating conditions, and continuously adjusts the turbocharger variable nozzle cross-sectional area or the bypass purge valve in order to make the actual supercharging pressure achieve the best performance. The quality and accuracy of supercharging pressure sensor have a great impact on automobile engine achieving the best working condition, therefore it is necessary to assess the performance of supercharging pressure sensor. The project content is to design supercharging pressure sensor measurement and control system(the main task is to design the software of measurement and control systems). This paper uses the virtual instrument technology to LabVIEW platform, combined with the supercharging pressure sensor characteristics, the development of a set of computer software testing system. And it also briefly describes the hardware composition of the supercharging pressure sensor test system and the relevant principles, for paving the way to the implementation of the future measurement and control system about the collocation between software and hardware. Sp