为此，详细介绍了螺杆泵油井工况宏观控制图的原理、分析模型和主要功能。

Based on this, the principle, analytical model and main functions of the screw pumping well working status macroscopic control chart are described in detail.

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与一般SPC系统相比，本系统不仅可以在线检测过程异常，对各种控制图异常模式还具有实时学习、在线识别功能。

Contrast to these common SPC systems, it can not only detect the unnatural process behavior on line, but can also learn and identify these unnatural patterns on control charts at the same time.

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提出数字化控制图系统的设计方案，并讨论系统的组成、功能结构以及具体的实现方法。

The design and project of numeral control chart are put forward, and the composing of system, functional structure and methods of realization are discussed also in this paper.

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