Electric field measurement apparatus

摘要

A charge coupled displacement sensor includes a first number of electrodes disposed to form a first ring including a first diameter and further operable to form an electric field around an object. A second number of electrodes are alternately disposed with the first number of electrodes within the first ring and are further operable to measure variations in the electric field attributed to a position of the object. A third number of electrodes are disposed to form a second ring including a second diameter greater than the first diameter and further electrically coupled with an electrical ground.

主权项

1. An apparatus comprising:
a first plurality of electrodes disposed to form a first ring comprising a first diameter, and further operable to form an electric field around an object; a second plurality of electrodes alternately disposed with said first plurality of electrodes within said first ring, and further operable to measure variations in said electric field attributed to a position of said object; a third plurality of electrodes disposed to form a second ring comprising a second diameter greater than said first diameter, and further electrically coupled with an electrical ground; and a plurality of floating traces disposed on a floating trace plane, and wherein each of said second plurality of electrodes is coupled with at least one floating trace.