Control technology of force balance in exchanging weights on deadweight force standard machineTANG Chun-qian, ZHANG Xue-cheng, YU Li-juan, ZHOU Chang-ming 1. National Institute of Measurement and Testing Technology, Chengdu 610021, China; 2. Jilin University, Changchun 130025, ChinaAbstract:Weights exchanges are common used in deadweight force standard machine when weight of equal value interval are uploaded and/or downloaded step by step. But the counter-force phenomenon could occur and the indication of testing dynamometer would be influenced.The paper presented the exchanging weights principle based on counterpoising the elastic force and the gravity of weights and introduced a preloading device used as force balancing in exchanging weights.This method that force balance control through preloading is feasible and effective theoretically and technically and has been analyzed in mechanics and proved by experiment.[著者文摘]
Key words:Deadweight force standard machine;Weight change;Counter-force phenomenon;Force balance control;Preloading device