For example, a transistor is a controllable switch, but it is directional between the collector and emitter, and it has interactive control between the base and emitter. 例如,晶体管是可控的开关,但它在集电极和发射极之间是定向的,并且在基极和发射极之间是配合控制的。
Z directional the pressure detection uses a cantilever beam pressure sensor, uses the light emitter diode and the photorectifier cooperate the special mechanism to detect the acupuncture and moxibustion turning angular speed in the XY plane. 其中Z向针灸下压力的检测采用悬臂梁压力传感器,对XY平面内的针灸扭转角速度的检测采用发光二极管和光电二极管配合特制的机械结构进行检测。