Research on the influence of velocity on particle counting sensitivity of microfluidic oil detection chip

The influence of velocity of oil debris on the sensitivity in metal debris counting with microfluidic oil detection chip is reported in this paper. A microfluidic oil detection chip of a three-dimension solenoid with a micro channel crossing its center was presented in this paper. When measuring the inductance value of microfluidic oil detection chip caused by the oil debris, it can be found that the oil debris velocity affects the inductive pulse signal. Through experiments, the results show that the amplitude of inductance change is influenced by velocity of oil debris if the size and material of oil debris are known. With the increase of velocity of oil debris, the amplitude of inductive signal decreases. This result is important and has reference value for sizing oil debris and other particles by microfluidic oil detection chip.