Patent ID: 11946470
Assignee: EBARA CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G  Y | IPC F  G

Claim 19:
20. A non-transitory computer readable recording medium storing a program detecting presence or absence of abnormality of a vacuum pump derived from products produced within a target vacuum pump, the program upon execution by a computer causing a system at least to:
determine a normal variation range or a normal time variation behavior of a target state quantity which is a state quantity varying depending on a load of gas flowing into the vacuum pump, based on at least one of past target state quantities of the target vacuum pump or another vacuum pump; and
compare a current target state quantity of the target vacuum pump with the normal variation range or the normal time variation behavior and output the comparison result,
wherein the one or more processors correct the past target state quantity based on a pressure in the target vacuum pump or a pressure in the other vacuum pump, and determine the normal variation range or the normal time variation behavior using the corrected past target state quantity, and correct the current target state quantity of the target vacuum pump based on the pressure in the target vacuum pump or the pressure in the other vacuum pump, and compare the corrected target state quantity with the normal variation range or the normal time variation behavior.