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It is very difficult to measure the shaft motion of a small rotary compressor because of mounting space availability, exposure to high temperature and high pressure as well as electromagnetic noise from the motor. This paper details the development of a built-in bearing sensor to measure the shaft motion of a rolling piston type compressor for an air conditioner. The bearing sensor is calibrated indirectly through measuring the oil relative permittivity. The shaft motions in both transient and steady state conditions are measured successfully using this built in bearing sensor.

Fundamental to intralimb coordination in the lower extremity, ankle-knee synergy induced by motor irradiation has long been employed to secure facilitation of paralyzed muscles. This study, a companion research subsequent to the time amplitude analysis of surface electromyography in part 1, was to investigate the recruitment strategy of irradiated muscles and prime movers during ankle isokinetic contraction at different contraction speeds (30, 60, 120 and 240 degrees/s) with time frequency analysis. The results indicated the recruitment strategies of the major irradiated muscles (ipsilateral rectus femoris/ipsilateral biceps femoris) and prime movers (anterior tibialis/gastrocnemius) were time-dependent and significantly different in terms of the instantaneous median frequency. In general, the prime movers for ankle isokinetic concentric contraction demonstrated a similar recruitment strategy, irrespective of different contraction speeds. This finding is consistent with the idea of generalized motor programs that speed is one of the constraint parameters supplied to motor programs. Nevertheless, the recruitment strategies of the irradiated muscles were highly inconsistent, varying across trials at different contraction speeds, and were not relevant to those of the prime movers. In addition, the recruitment in the irradiated muscles seemly limited to motor units of low threshold, in spite of maximal voluntary contraction of the prime movers.

INTRODUCTION Quiet stance is a complicated motor act, requiring sophisticated sensorimotor integration to balance an artificial inverted pendulum with the ankle musculature [1]. To characterize the effects of stance pattern and the stationary finger contact upon soleus excitability and postural sway, this study was conducted to assess how soleus H reflex and postural sway were modulated for unilateral and bilateral legged-stances and touch vector of finger during unilateral stance.