液量平衡控制技术的研究

Research on Fluid Volume Balance Control Technology

在一些医用仪器设备设计中,常常需要设计一个保持液量平衡的功能,为了降低混合液体理化特性变化引起的平衡结果误差,我们通过液量传输过程中的体积和质量变化规律来研究液量平衡控制技术。利用实验器材组装一个验证平台,按照容量平衡模型和质量平衡模型的要求设计、测试、记录实验数据。计算分析这些数据,判断影响液量平衡的物理因素及其影响误差的大小。对于混合液体来说,浓度(密度)、温度、压力的差异以及计量仪器精度均是整个液量平衡误差的根源,仅仅依靠液体容积参数的监测来判断平衡特性是不准确和可靠的,实现混合液体容量和质量共同平衡机制,利用多点多参数监测并进行精密的控制处理,才能进一步提高液量平衡技术的设计水平。

It is often necessary to design a function to keep balance of fluid volume in some medical instruments and equipment design.In order to reduce the equilibrium result error caused by the change in the physical and chemical properties of the mixed liquid,we studied the fluid volume balance control technology through the change rule of the liquid dimension and mass in the process of transmission.The experiment equipment was used to assemble a verification platform to design,test and record the experiment data according to the requirements of capacity balance model and the mass balance model.These data were calculated and analyzed,physical factors affecting fluid volume balance and influence error were determined.For mixed liquid concentration(density),temperature,pressure difference and the precision level of measuring instruments were the source of the total fluid volume balance error.It is not accurate and not reliable for relying only on the parameters monitoring to determine the liquid volume equilibrium characteristics.To further improve the level of the design of the fluid volume balance technology,achieving mixed fluid dimension and mass of common balance mechanism,the multipoint multi-parameter monitor and precision control and process are necessary.