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dian qiao xiang wei zi dong ping heng de yi ge li lun
Author(s): Ning Jiao-shan He Sie-long
Pages: 287-
290
Year: 1981
Issue:
3
Journal: Chinese Journal of Theoretical and Applied Mechanics
Keyword: 动平衡; 静态应变仪; 相位平衡; 交流电桥; 分布电容; 正弦载波; 变压器电桥; 设计和使用; 放大器; 设计方法;
Abstract: This paper provides the major results of research for the automatic phase balance of AC bridge. It gives computational formulas of volt output for AC bridge based on the general case of having capacitance effects in all of the four arms of the bridge and ten operating conditions for two types of connections with the ground which occur in the strain indicator. A unified formula is developed. Conditions of maximum errors are found by differentiating a function of four variables. These results have formed the theoretical foundations for automatic phase balance of strain indicator. Finally, this paper gives a circuit block diagram of a transformer-bridge static-strain indicator.
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