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针对能损在线监测系统软件开发和调试的需要，论述了数据采集离线模拟的实现原理，通过对DOS扩展、精确延时及DOSSWAP技术的运用解决了DOS重入等问题。文中提供了编程举例，介绍了软件的实现方法，并对具体实现方案作了框架介绍。此项技术对于电厂其它在线监测软件的开发和调试具有较高的实用价值。
In order to meet the need of software development and debugging of on-line monitoring system, this paper discusses the realization principle of off-line simulation of data acquisition and solves the problem of DOS re-entry by using DOS extension, precise delay and DOSSWAP technology. The article provides a programming example, describes the software implementation, and made a specific introduction to the framework introduced. This technology has high practical value for the development and debugging of other on-line monitoring software in power plant.