| 摘要 |
<p>The invention provides a reliable means for measuring the available fluid volume in a hydraulic accumulator. The displaceable part (5) of a piston (4) in an accumulator (1), which separates the fluid volume (2b) from the gas volume (2a), is connected to a wire (6) that runs through the fluid volume and exits to the outside of the accumulator through a sealed opening (9) close to the hydraulic valve (3). From there, the wire is led over pulleys (10, 11) to run trough a longitudinal hollow member (LVDT) that is attached to the accumulator (1), and carries a metallic core member (8), whose position can electrically be monitored between two end points, as a result of the change of the magnetic field produced by electric coils surrounding the trajectory of the core member as known from linear variable differential transformers (LVTD), in order to give an accurate reading of the position of the piston (4), which is a function of the fluid volume present within the accumulator (1).</p> |
