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US 11,454,354 B2Granted
Pipe diagnosis apparatus, asset management apparatus, pipe diagnosis method, and computer-readable recording medium
AssigneeNEC Corporation
InventorManabu Kusumoto
Life of this patent
Estimating the term…
Abstract
A pipe diagnosis apparatus 10 includes a simulation execution unit 11 that simulates vibrations of pressure in a pipe included in piping equipment to be diagnosed, based on pipe information for specifying a configuration of the piping equipment, and a stress analysis unit 12 that calculates stress that occurs in a pipe included in the piping equipment, based on pressure vibrations acquired through simulation.
Claims9
A pipe diagnosis apparatus comprising:
- a processor;
- a memory storing program code executable by the processor to:
- construct an electric circuit equivalent to piping equipment by using pipe information specifying a configuration of the piping equipment acquired from a database and by corresponding voltage in the electric circuit as pressure vibration in a pipe of the piping equipment;
- execute a simulation on the electrical circuit using a simulator to simulate the electric circuit to obtain the pressure vibration in the pipe of the piping equipment by performing small signal analysis over a range of frequencies;
- when executing the simulation, acquire an amplitude of the pressure vibration in the pipe of the piping equipment for each frequency within the range;
- calculate stress that stretches the pipe in a circumferential direction of the pipe of the piping equipment, based on a diameter and a thickness of the pipe and the pressure vibration acquired through the simulation, by integrating the amplitude of the pressure vibration over the range of the frequencies;
- and
- estimate a degree of fatigue that has a value which increases as a number of times that stress occurs increases, and use the degree of fatigue as a failure risk of the piping equipment.
5 more elements
A pipe diagnosis method comprising:
- constructing an electric circuit equivalent to piping equipment by using pipe information specifying a configuration of the piping equipment acquired from a database and by corresponding voltage in the electric circuit as pressure vibration in a pipe of the piping equipment;
- executing a simulation on the electrical circuit using a simulator to simulate the electric circuit to obtain the pressure vibration in the pipe of the piping equipment by performing small signal analysis over a range of frequencies;
- when executing the simulation, acquiring an amplitude of the pressure vibration in the pipe of the piping equipment for each frequency within the range;
- calculating stress that stretches the pipe in a circumferential direction of the pipe of the piping equipment, based on a diameter and a thickness of the pipe and the pressure vibration acquired through the simulation, by integrating the amplitude of the pressure vibration over the range of the frequencies;
- and
- estimating a degree of fatigue that has a value which increases as a number of times that stress occurs increases, and using the degree of fatigue as a failure risk of the piping equipment.
3 more elements
A non-transitory computer-readable recording medium that stores a program that contains instructions for causing a computer to execute:
- constructing an electric circuit equivalent to piping equipment by using pipe information specifying a configuration of the piping equipment acquired from a database and by corresponding voltage in the electric circuit as pressure vibration in a pipe of the piping equipment;
- executing a simulation on the electrical circuit using a simulator to simulate the electric circuit to obtain the pressure vibration in the pipe of the piping equipment by performing small signal analysis over a range of frequencies;
- when executing the simulation, acquiring an amplitude of the pressure vibration in the pipe of the piping equipment for each frequency within the range;
- calculating stress that stretches the pipe in a circumferential direction of the pipe of the piping equipment, based on a diameter and a thickness of the pipe and the pressure vibration acquired through the simulation, by integrating the amplitude of the pressure vibration over the range of the frequencies;
- and
- estimating a degree of fatigue that has a value which increases as a number of times that stress occurs increases, and using the degree of fatigue as a failure risk of the piping equipment.
3 more elements
Dependencies are inferred from the claim text.