초록 ▼

In one embodiment of the present invention, a method for measuring fluid level use a sensor comprising a first plate having continuous electrically conductive material and a second plate having electrically conductive material disposed in segments, the electrically conductive material of the first p

In one embodiment of the present invention, a method for measuring fluid level use a sensor comprising a first plate having continuous electrically conductive material and a second plate having electrically conductive material disposed in segments, the electrically conductive material of the first plate in opposition to the electrically conductive material of the second plate. The method comprises immersing the sensor in the fluid with at least one segment completely immersed in the fluid and at least one said segment completely out of the fluid. The method also includes sequentially energizing the segments. Further, the method includes detecting times of voltage transitions of a first signal at the first plate, relative to the sequential energizing of the segments, as an indication of fluid level.

대표청구항 ▼

[ What is claimed is:] [1.] A method for measuring fluid level using a sensor comprising a first plate having continuous electrically conductive material and a second plate having electrically conductive material disposed in segments, said electrically conductive material of said first plate in oppo

[ What is claimed is:] [1.] A method for measuring fluid level using a sensor comprising a first plate having continuous electrically conductive material and a second plate having electrically conductive material disposed in segments, said electrically conductive material of said first plate in opposition to said electrically conductive material of said second plate, said method comprising:immersing said sensor in said fluid with at least one said segment completely immersed in said fluid and at least one said segment completely out of said fluid;sequentially energizing said segments; anddetecting times of voltage transitions of a first signal at said first plate, relative to said sequential energizing of said segments, as an indication of said fluid level;wherein said step of detecting times of voltage transitions further comprises eliminating negative-going portions of said first signal to create a positive signal; andwherein said step of detecting times of voltage transitions further comprises inverting said positive signal to create an inverted signal and combining said inverted signal and said first signal to create a bipolar signal.