针对目前国内的混凝土搅拌设备在搅拌的匀质性判断方面存在的不足 ,提出根据搅拌过程中搅拌轴扭矩梯度的变化来作为补充性判据 .应用应变式传感器 ,对搅拌轴所受的应变进行了测量 ,设计制作了测量电路 ,并对影响电桥工作的零漂、寄生电容等做了理论分析和实际解决方案 ;给出了采用PCL81 8组成的系统结构和设计方法 ;该系统可以为混凝土搅拌计算机监控系统加入补充判据 ,从而指导生产过程的控制操作 . In view of the shortcomings of the current domestic concrete mixing equipment in determining the homogeneity of mixing, the paper proposes that the change of the torque gradient of the mixing shaft should be taken as a supplementary criterion in the process of mixing.With the strain sensor, the strain on the mixing shaft The measurement circuit is designed and measured. Theoretical analysis and practical solution are made to the zero-drift and parasitic capacitance which affect the work of the bridge. The system structure and design method using PCL81 8 are given. The system can be used for concrete Mixing computer monitoring system to join the additional criteria, so as to guide the production process control operation.