Patent ID: 11904826
Assignee: MITSUBISHI ELECTRIC CORPORATION
Field: Mechanical elements (Mechanical engineering)
Classification: CPC B  F  G | IPC B  F

Claim 19:
20. A degradation detection method for a pressure regulating valve in a pressure control device that includes (i) a conversion valve to adjust a pressure of a fluid supplied from a fluid source and output the fluid, and (ii) the pressure regulating valve to adjust, in accordance with a pressure of the fluid output by the conversion valve, the pressure of the fluid supplied from the fluid source and output the fluid, the degradation detection method comprising:
applying a command pressure to a physical model that expresses physical quantities of components of the pressure regulating valve based on a parameter of each of the components of the valve regulating valve to obtain a waveform of a response pressure that is a pressure of the fluid output by the pressure regulating valve, the command pressure being the pressure of the fluid output by the conversion valve, and identifying a degraded component among the components of the pressure regulating valve from a value of the parameter of the physical model that are used for obtaining a waveform, among the found waveforms of the response pressure, that matches a waveform of the detected response pressure.