Teruo Maruyama

Position sensing apparatus for an object to be measured

A position sensing apparatus includes an ultrasonic wave transmit-receive element for transmitting and receiving ultrasonic waves to and from an object whose position is to be sensed and a manipulator for changing the relative positions between the object and the ultrasonic wave transmit-receive element, and a signal processor utilizing changes in the reflected signal intensity in the vicinity of the center of the object to be measured, thereby sensing the position of the object.

Capacity Self-controllable Rotary Type Compressors for Automotive Air-conditioners : 1st Report, Basic Design Theory

The disadvantage of rotary type compressors for automotive air-conditioners is that the refrigerating capacity increases linearly in proportion to the increase linearly in proportion to the increase in engine speed, and so in the present research, attention was focussed upon the phenomenon of the refrigerating flow in the suction stroke, and the conditions for construction of capacity self-controllable type compressors by selecting suitable parameters were established, In this report, the basic equations which represent all stages of the vanes position in suction passage during the suction stroke have been introduced. By theoretical analysis of the equations, it was found that the capacity self-control characteristics by choosing the area of the suction port and suction groove could be calculated. These results were confirmed by the experiments.