关键词: 容积式泵, 工作性能, 多自由度, 质量法, 计算机技术, 数学模型

Abstract: The positive displacement pump used in crop protection equipment， is mainly used for drug spraying of economic trees and field crops， and also for areas such as daily cleaning， sanitation and disinfection. Based on the requirements of industrial development and enhancing testing capabilities， it is inevitable to design a performance testing system with higher level of automation and intelligence. The positive displacement pump performance indicators， including volumetric efficiency and overall efficiency， are the basis for the design of performance testing system. The main design includes a universal mounting platform with multi\|degrees of freedom， a high-precision flow measurement device using weighting method and a control system with technology of sensor and computer， and the mathematical model of performance and fitting curve used in the performance testing system.

Key words: positive displacement pump, performance, multi-degrees of freedom, weighting method, computer technology, mathematical model