Cylinder operating condition monitoring device
AssigneeSMC Corporation
InventorAtsushi Fujiwara
Life of this patent
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Abstract
A microcomputer of a detector that constitutes part of a monitoring device calculates differential pressures (first differential pressure, second differential pressure) between a first pressure value detected by a first pressure sensor provided in a first tube and a second pressure value detected by a second pressure sensor provided in a second tube, and on the basis of the calculated differential pressure, determines whether or not a reciprocating motion operation of the piston is in an intermediate state between a normal state and an abnormal state.
Claims6
An operating condition monitoring device for a cylinder, in which a first cylinder chamber is formed between a piston and one end in an interior of a cylinder main body, a second cylinder chamber is formed between the piston and another end in the interior of the cylinder main body, and fluid is supplied from a fluid supply source to the first cylinder chamber, or fluid is supplied from the fluid supply source to the second cylinder chamber, whereby the piston which is connected to a piston rod undergoes reciprocating motion between the one end and the other end inside the cylinder main body, comprising:
- a first pressure detection unit adapted to detect a pressure value of the first cylinder chamber;
- a second pressure detection unit adapted to detect a pressure value of the second cylinder chamber;
- a differential pressure calculating unit adapted to calculate a differential pressure between the pressure value detected by the first pressure detection unit and the pressure value detected by the second pressure detection unit;
- a determination unit adapted to determine, based on the differential pressure calculated by the differential pressure calculating unit, whether or not the reciprocating motion operation of the piston is in an intermediate state between a normal state and an abnormal state;
- and
- a storage unit adapted to store the calculated differential pressure, in an event that, during reciprocating motion of the piston, the first pressure detection unit has detected the pressure value of the first cylinder chamber, the second pressure detection unit has detected the pressure value of the second cylinder chamber, and the differential pressure calculating unit has calculated the differential pressure of the respective pressure values;
- wherein, at completion of the reciprocating motion operation, the determination unit determines whether or not the reciprocating motion operation is in the intermediate state based on the differential pressure that is stored in the storage unit.
Dependencies are inferred from the claim text.