Abstract: Aiming at the needs of online performance monitoring and fault diagnosis, data acquisition system for internal-combustion engine is designed. The whole system is composed of a portable computer, a multi-channel data acquisition card——PCL-818HD, signal conditioning circuits and some related sensors. Also, programming method of data acquisition program based on VB and DLL techniques under Windows environment is introduced. The high speed data acquisition for startup signal, oil signal and vibration signal of internal-combustion engine is realized, which provides a basis for the analysis of internal-combustion engine performance condition and fault diagnosis.

Key words: PCL-818HD data acquisition card, data acquisition, fault diagnosis, internal-combustion engine

摘要： 针对内燃机在线性能监测和故障诊断的需求，利用PCL-818HD数据采集卡完成了内燃机工况参数数据采集系统的硬件设计，整个系统由便携式工控机、数据采集卡、传感器及其调理电路等部分组成。介绍了基于VB和DLL技术的Windows环境下数据采集程序的编制。该系统能实现对内燃机启动系统、供油系统和振动信号的高速采集，为分析内燃机性能状态并进行故障诊断提供了保证。

关键词: PCL-818HD数据采集卡, 数据采集, 故障诊断, 内燃机

CLC Number: 

• TP273