Measurement time determination device, measurement time determination method, and computer-readable recording medium

1. A measurement time determination device, comprising:

an input interface configured to receive vibration measurement results transmitted from a plurality of vibration sensors attached to piping;

a degree-of-ease calculation-unit configured to calculate degree-of-ease of detecting a leak in the piping, based on the received vibration measurement results of vibration propagating through the piping or a fluid flowing through the piping when the piping is vibrated, the degree-of ease representing a signal-to-noise ratio, the signal being a leak vibration to be sensed, the noise being generated due to a cause other than the leak vibration;

a determination-unit configured to determine a plurality of measurement times necessary for detecting the leak, based on the degree-of-ease, the measurement times being determined for each of a plurality of the leak vibrations having a different magnitude; and

a leak detection unit configured to detect a position in the piping of the leak based on the plurality of measurement times determined by the determination-unit.

2. The measurement time determination device according to claim 1 , wherein

the degree-of-ease calculation unit calculates an attenuation characteristic of the vibration in the piping as part of the degree-of-ease.

3. The measurement time determination device according to claim 1 , wherein

the degree-of-ease calculation unit further calculates the degree-of-ease, based on information related to an element of the piping, and

the determination unit further determines the measurement times, based on the information related to the element of the piping.

4. The measurement time determination device according to claim 3 , wherein

the information related to the element of the piping is information related to attenuation of the vibration propagating through the piping or the fluid according to the element.

5. The measurement time determination device according to claim 1 , wherein

the degree-of-ease calculation-unit calculates the signal-to-noise ratio of a cross-correlation function as the degree-of-ease for each of a plurality of pieces of the piping, and

the determination unit further determines the measurement times, based on a relationship between the signal-to-noise ratio of the cross-correlation function related to each of the plurality of pieces of the piping and a result of measuring the leak on each of the plurality of pieces of the piping.

6. The measurement time determination device according to claim 5 , wherein

the determination-unit further determines the measurement times with respect to the signal-to-noise ratio by generating an identifier that learns a relationship between the signal-to-noise ratio of the cross-correlation function for each of the plurality of pieces of the piping and whether or not measuring the leak is possible in the measurement time in the piping.

7. A measurement time determination method, comprising:

receiving vibration measurement results transmitted from a plurality of vibration sensors attached to piping;

calculating degree-of-ease of detecting a leak in the piping, based on the received vibration measurement results of vibration propagating through the piping or a fluid flowing through the piping when the piping is vibrated, the degree-of ease representing a signal-to-noise ratio, the signal being leak vibration to be sensed, the noise being generated due to a cause other than the leak vibration;

determining a plurality of measurement times necessary for detecting the leak, based on the degree-of-ease, the measurement times being determined for each of a plurality of the leak vibrations having a different magnitude; and

detecting a position in the piping of the leak based on the determined plurality of measurement times.

8. A non-transitory computer-readable recording medium that stores a program causing a computer to execute:

processing of receiving vibration measurement results transmitted from a plurality of vibration sensors attached to piping;

processing of calculating degree-of-ease of detecting a leak in the piping, based on the received vibration measurement results of vibration propagating through the piping or a fluid flowing through the piping when the piping is vibrated, the degree-of ease representing a signal-to-noise ratio, the signal being leak vibration to be sensed, the noise being generated due to a cause other than the leak vibration;

processing of determining a plurality of measurement times necessary for detecting the leak, based on the degree-of-ease, the measurement times being determined for each of a plurality of the leak vibrations having a different magnitude; and

processing of detecting a position in the piping of the leak based on the determined plurality of measurement times.