Water Content Detection for Fine Iron Powder Based on Capacitance Sensor
The water content of fine iron powder is an important parameter to evaluate the fine iron powder price, and there is very important practical significance for rapidly measuring water content of the fine iron powder during manufacturing and trading. So water content detecting method is explored for fine iron powder based on capacitance sensor. The capacitance size depends on the dielectric constant of material between the plates, and the capacitance value reflects the iron powder water content. The water content measurement system for the fine iron powder is designed based on the principle above. The measurement probe components and its testing mechanics are researched, and capacitance measurement circuit and single chip control system of STC89C55 are designed. The software programming and debugging for single chip control system are completed. The experimental results show that the capacitive measurement method of water content for fine iron powder is feasible and easy to implement real-time or rapid monitoring.
Yun-Hae Kim and Prasad Yarlagadda
L. J. Wang et al., "Water Content Detection for Fine Iron Powder Based on Capacitance Sensor", Applied Mechanics and Materials, Vols. 303-306, pp. 884-890, 2013