Patent ID: 11892097
Assignee: KITZ CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F  G | IPC F  G

Claim 0:
1. A valve state grasping system comprising:
a valve configured as a rotational valve for opening and closing a flow path by rotating a valve stem;
a sensor unit including a motion sensor fixed to the valve stem; and
a server communicably connected to the sensor unit and including a database,
wherein the valve state is grasped based on output data relating to a rotation of the valve stem output from the motion sensor to the sensor unit and/or the server,
wherein the database stores in advance and as reference data, the output data from an opening step, which is an opening degree divided into multiple steps between fully open and fully closed of the valve, measured by the sensor unit for a number of valve openings and closings, and
wherein the sensor unit and/or the server include an abnormality diagnosis means for determining whether or not the output data actually measured by the motion sensor and the output data of the reference data satisfy an equality condition at a same number of valve openings and closings, and determining the valve state when it is determined that both the output data actually measured and the output data of the reference data satisfy the equality condition, and rewriting the output data of the reference data based on the output data actually measured by the motion sensor when it is determined that both the output data actually measured and the output data of the reference data do not satisfy the equality condition.