| Summary: | 碩士 === 國立虎尾科技大學 === 機械與機電工程研究所 === 97 === Nowadays the measurements of the sensor signal of the engine management system in the vehicle are special purpose diagnostic tools which are primarily provided by the trade car makers. However, these instruments are often limited by the memory size of the hardware itself. This is the reason why the vehicle servicemen fail to monitor the frequency and time instant of the intermittent faults of the various sensors in engine management system over a long period of time. The objective of this research is to develop a data acquisition application program with Chinese human interface which runs in the Windows operating system environment. The research divides into two aspects: the hardware and the software.
The hardware of the research mainly consists of the USB - 4711A data acquisition card produced by ADVANTECH and the Fluck 98 automotive scope. By comparing the functionality and the accuracy of measurement we can estimate the performances of the two equipments.
In the software aspect, we develop the functionalities and human interfaces of the application program by using MFC of Microsoft Visual Studio 2005. The windows of the application program consist of the Profile demonstration, the parameters configuration, and the setting of voltage scale as well as time base. The functionalities of the data acquisition includes: loading from the files and displaying the results which are measured real-time from the various sensor signals.
The experiment results demonstrate that the data acquisition system developed in the research is more accurate than the Fluck 98 automotive scope. The developed data acquisition system is more excellent than the Fluke 98 automotive scope in resolution, transmitting speed and flexibility.
According to the results of the research, the developed data acquisition system except can satisfy the demands of the engine repair and the performance analysis. It can also save the expenses the vehicles repair needed including the repair time, spare parts, as well as has the elastic merit and so on. It’s not only a powerful and quick engine repair system but it is also a new learning system. It not only helps the servicemen speeding up the services but also increases the accuracy when diagnosis a fault engine.
|
|---|
