Qt-based Design of Vehicle Virtual Instrumentation System

To monitoring the vehicles operating parameters, in this paper, a Qt-based virtual instrument design method is presented. In this method, the core of the instrument consists of the OBD hardware interface and application software in PC. The OBD interface hardware is used to read OBD real-time data, and the graphical virtual instrument is displayed on the PC equipment. After analyzing the key technology of K-line with OBD, the Qt serial port development software design plan was built. The designed virtual instrumentation has been implemented and some tests have been performed. The test result shows that this design is reliable and able to monitor the vehicles operating parameters.