有些水生动物不依靠视觉、听觉，而依靠自身放电在周围形成电场，当附近有导体和不良导体存在时，该电场便产生歪斜，从而由感知这种歪斜进行定位，此称为电场定位。
除了回声定位，他们可以感觉到他们猎物的电场 - 这首次在真正的哺乳动物被观测到。
In addition to echolocation, they can sensethe electric fields of their prey – the first time this has been seen in truemammals.
目的：探讨基于低频电场方式进行心腔内三维定位导航及心内膜重构的可行性。
Objective: To approach the feasibility of the three-dimensional positioning and navigation with regular catheter electrodes in intracavitary with a low-frequency electrical field.
压电陶瓷致动器在电场驱动下会产生迟滞和蠕变现象，降低了定位精度。
Piezoelectric actuator controlled by electric field shows serious hysteresis and creep phenomena, which severely degrades the positioning accuracy.
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