Abstract:
Ein Ultraschall-Wegmesssystem (1), insbesondere einsetzbar für Hydrospeicher (3) mit mindestens einem bewegbaren Trennelement (5), das innerhalb eines Gehäuses (7) zwei Medienräume (9, 11) vorzugsweise mediendicht voneinander trennt, wobei der eine Medienraum (9) ein kompressibles oder ein inkompressibles Fluid und der andere Medienraum (11) ein kompressibles Fluid, insbesondere in Form eines Arbeitsgases, aufnimmt, wobei mittels mindestens eines Ultraschallsensors (13) die jeweilige Position des bewegbaren Trennelementes (5) innerhalb des Gehäuses (7) erfassbar ist, ist dadurch gekennzeichnet, dass der jeweilige Ultraschal lsensor (13) seine Positionserfassung des Trennelementes (5) auf der Seite des anderen Medienraumes (11) mit dem kompressiblen Fluid vornimmt. Die Erfindung betrifft ferner ein Verfahren zur Ultraschall-Wegmessung mit einem solchen System.
Abstract:
The invention concerns a reflector (100) for reflecting electromagnetic waves, which waves are emitted into a conducting structure (101) from at least one antenna (4) situated at a distance (d') from the reflector (100). The distance (d') is calculated based on measured emitted and reflected waves to and from the reflector (100), respectively. The inventive reflector (100) comprises a reflector disc (102), an elongated body (103,103') having a first longitudinal end (105) and a second longitudinal end (106), the first longitudinal end (105) being fastened to the reflector disc (102) and the second longitudinal end (106) being fastenable to an accumulator piston (107, 107'). Said elongated body (103, 103') further comprises at least two telescopically interconnected reflector tubes (103, 103') rendering reversible adjustment of the elongated body's (103, 103') longitudinal length around a predetermined equilibrium length possible. The invention also concerns a piston accumulator (2,116) applying the reflector, and a method for measuring said distance (d').
Abstract:
An apparatus for determining the weight of a payload (44) in a bucket (24) of a machine (20) where the bucket (24) is attached to a chassis (26) of the machine (20) by a linkage. The apparatus comprises an energy storage device (82) for storing potential energy of the bucket (24), payload (44), and linkage when the bucket (24) is moved from a first suspended position to a second suspended position. A mechanism (86) provides physical data corresponding to a physical change in the energy storage device (82) caused by storage of the potential energy and a processor (116) calculates the weight of the payload (44) using the physical data.
Abstract:
PURPOSE:To ensure the safe of an accumulator by mounting a mechanism, which serves to detect the current position of a moving piston constituting the wall face of a pressure accumulator chamber, on a piston rod. CONSTITUTION:A permanent magnet piece 15 and a reed switch 16 which serve to detect the current position of a moving piston 2 constituting the wall face of a pressure accumulator chamber 3 are mounted on a piston rod 6. When a adjusting mechanism for the internal capacity of the pressure accumulator chamber 3 fails to operate properly, the failure can be detected electrically by the permanent magnet piece 15 and the reed switch 16. The safe characteristics can be ensured.