热针法沉降浓度测量系统及其应用

The sedimentation rate measurement system with thermal probe and its application

设计研发了一种新型的固液两相混合物沉降浓度测量系统,并将该系统应用于硅油基羰基铁粉磁流变液的沉降浓度测量。该系统首先用热针法对被测样品进行加热并获得样品温度与时间变化关系,计算样品导热系数,再根据所建立的沉降浓度与导热系数的对应关系,间接得到样品的沉降浓度。对硅油基羰基铁粉磁流变液沉降浓度的一系列实时在线测量实验,表明了该系统具有硬件成本低、测试速度快、测量结果可靠、可长期实时在线检测等优点,具有较大的应用前景。

In this paper, a new type of the sedimentation rate measurement system for solid-liquid two-phase mixtures is designed and developed, and the system is used to measure the sedimentation concentration of carbonyl iron magneto-rheological fluids. The relationship between temperature and time about the sample when it is heated by the thermal probe of the system was obtained, and the thermal conductivity of the sample was calculated. And then the sedimentation concentration of the sample was obtained indirectly. A series of experiments on the sedimentation state of carbonyl iron magneto-rheological fluids show that the system has the advantages of low hardware cost, fast testing speed, reliable measurement results and long-term real-time on-line detection, and has great application foreground.