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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.

Accurate detection of metallic wear debris is vital to avoid catastrophic failure of machine. An inductive metallic debris sensor in accordance with the theory of electromagnetism is presented to discuss the relationship between the sensitivity of inductive sensor and the position of microchannel inside the planar coil. Iron particles with 110–120µm in diameter are used in the experiment and the result demonstrate that the different position of microchannel does have influence on the sensitivity of planar coil. The sensitivity can be significantly improved when changing the position of microchannel, 130% increase in inductance amplitude could be got when the microchannel is near the edge of coil in contrast to near the center.

Stroke patients may have limb paralysis or disturbance of consciousness. In the rehabilitation system, the main task of human-computer interaction focused on visual interaction. In this study, it has been confirmed that the visual feedback system in the rehabilitation has played an important role. This robotic system combines a dual video to meet training needs. In the experiment, trainees trains in accordance with the planned trajectory. Through the combined visual system, motion analysis feeds back to trainees in real time. iIn comparing to traditional training without feedback, the combination of Visual feedback can enhance the trainee's consciousness of balance, train the neural sensitivity of the brain and nerve system, and can restore the movement ability.