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阐述了电子负秤的基本原理，对比分析了正秤和负秤在混凝土配料计量方面的性能。介绍了一种新颖的计算机控制的混凝土自动配料机。该配料机首次采用电子负秤这一独特的计量原理，结构设计简单、合理，具有较高的性能价格比。最后探讨了消除或减少系统配料误差的几种方法。
The basic principle of electronic negative scale is expounded, and the performance of positive and negative scale in concrete ingredient metering is compared and analyzed. A novel computer-controlled automatic concrete batching machine is introduced. The batching machine adopts the unique measurement principle of electronic negative scale for the first time. The structure design is simple and reasonable with high performance-price ratio. Finally, several methods to eliminate or reduce the errors of system ingredients are discussed.