METHOD FOR DETERMINING A POSITION OF A PISTON IN A PISTON PRESSURE ACCUMULATOR BY RESISTANCE MEASUREMENT AND SUITABLY DESIGNED PISTON PRESSURE ACCUMULATOR

摘要

The invention relates to a method for determining a position of a piston (5) in a piston pressure accumulator (1) and a ON correspondingly designed piston pressure accumulator (1). A housing (3) accommodates a displaceable piston (5). An electrode arrangement (15) having a plurality of 4-point measurement electrode pairs (17) is provided on the electrically conductive housing (3) and is designed to determine a position of the piston (5) inside the housing (3) by measuring a distribution of an electrical resistance or potential between inner electrodes (21) when a current is applied to outer electrodes (19), depending on a position along the housing (3). The position of the piston determined from the measurement of the potential distribution can be used to determine or check a charge state of the piston pressure accumulator (1).

主权项

1. A method for determining a position of a piston (5) within a piston pressure accumulator (1), wherein the piston pressure accumulator (1) has a housing (3) and a piston (5) which can be moved within the housing (3), characterized in that the method comprises:
determining the position of the piston (5) by measuring a distribution of the electrical resistance along the housing (3).