KR100906922B1 - A flow leak detection method and system using compensated flow measuring - Google Patents

Abstract

A leak detection method and system using compensated flow measurement are provided to determine a leakage easily using flow rate information only and to decide the leakage more accurately by verifying the leakage determination. A leak detection method using compensated flow measurement comprises a step in which flow rate is input from flow meters installed at two spots in a fluid pipe(S10), a step of obtaining a correction constant between the flow meters(S20), a step of compensating the flow rate of the two spots with the correction constant to obtain a flow rate difference between the two spots(S30), a step of determining a leakage when the flow rate difference is equal to or greater than a reference value(S40), a step of repeating the above steps from the flow rate input step when the flow rate difference is less than the reference value(S50), and a step of verifying the leakage determination by using the average flow rate(S60). The correction constant is the ratio of the average flow rate of A spot to the average flow rate of B spot.

Description

A flow leak detection method and system using compensated flow measuring}

The present invention relates to a method and apparatus for receiving flow information from a flowmeter installed at two points in an oil pipe, correcting a flowmeter measurement error, and detecting leakage using a flow rate between two points.

In general, an oil pipeline is a pipe that transports oil or oil in a very long section of several tens or hundreds of kilometers. Oil pipelines for the transport of oil, etc., require oil storage and pressurization facilities in addition to oil pipelines. A reservoir is a place to store or ship petroleum, etc. transported to a pipeline, and a pressurized facility is a facility that maintains an appropriate pressure in the pipeline to transport oil. Pressurized facilities should be installed at oil refineries, which are the starting point of oil pipelines, and major intermediate points to maintain the proper pressure. On the other hand, the oil pipeline may not transport a single item like a gas pipeline or a crude oil pipeline, but may carry various oils such as gasoline, kerosene, diesel, and aviation through a single tube. At this time, the pressure should be maintained so that different oil types do not mix with each other.

The most important thing in managing these pipelines is to prevent leakage. Oil leakage in pipelines can be caused by a number of causes. For example, when an oil pipe pipe leaks due to aging, such as corrosion, leaks due to damage to the pipe due to a change in the ground, such as an earthquake, the pipe may be damaged by vibration in a nearby construction site. Oil spills are economically detrimental due to oil leakage, but spills into areas where oil pipelines are buried, which also has a significant negative impact on environmental issues. In particular, the cost is considerable because the damage due to leakage occurring in the adjacent area where the pipe is buried must be compensated. In addition, there are many cases where oil is drilled through the oil pipe to drain the oil itself. In particular, it is very difficult to establish a surveillance system at every point of a pipeline because pipelines are long, typically tens to hundreds of kilometers in length.

Therefore, it is one of the most desirable preventive measures to detect leaks in oil pipes accurately and quickly and to take countermeasures immediately. That is, a technique for accurately and quickly detecting oil leakage and an oil leak position of an oil pipe is needed.

In addition to oil pipelines, various methods of detecting leaks or leaks in piping are introduced. For example, by installing a water detection sensor on the outside of the pipe to detect water leaking out when leaks occur, or by installing a pressure sensor on the pipe to detect water leaks by using a lower pressure. Is used. However, the above-described sensing methods have a disadvantage in that the cost is too high to be installed and used in a tube having a very long length such as an oil pipe.

On the other hand, a technique for detecting a leak by comparing the amount of flow flowing at two points of the pipe flowing fluid [Korea Open Utility Model No. 2007-0000856 (2007.7.30. Disclosure), "Leakage water leak detection device to the leachate feed pipe"]] Is disclosed. The prior art is a leak detection device for real-time monitoring of leaks in the leachate transport pipeline for transferring the leachate generated from the landfill to a nearby final treatment plant, the leachate transfer pump installed to transfer the leachate, and the leachate flow rate to be transferred It consists of a conveyance flowmeter which can be carried out, an inflow flowmeter which can measure the flow volume of an inflow point, and PLC which carries out the comparative analysis of the flow volume data which flows in, and the flow volume data which flows in. In particular, the prior art only describes that the determination of leakage is judged as a change in the difference between the flow rate value at the inlet and the flow rate value at the outlet.

In addition, the technology for detecting the leakage by measuring the flow rate of the flow section of the pipe flow by comparing the amount [Korean Patent No. 10-0527011 (released November 9, 2005), "Automatic measurement of water leakage and leakage section of water pipes Method ". The prior art relates to a method for automatically measuring the amount of leakage and leakage section of the water pipe line, which is blocked in units from the water supply basin or water purification plant to each customer, and the precision electronic flow meter and the flow rate in the inlet and discharge lines of each block Each device is equipped with a device for transmitting information, and the flow rate information transmitted from each of the installed flow meters is constantly monitored to provide a method of measuring the amount of leakage compared to the flow rate of the inflow line and the sum of the flow rates of the discharge line.

However, the above-mentioned prior arts merely describe that the change in the difference between the flow rate value of the inlet flow rate and the outlet flow rate, or the sum of the flow rate of the inflow pipe and the discharge flow path is compared, and does not provide a specific judgment means. In addition, the prior art does not consider the problem caused by the error of the flow meter or the error due to the medium of the fluid flowing in the pipe. In other words, if the flow meter has an error, since the error will be proportional to the amount of flow rate, the difference between the flow rate value of the inlet and the outlet flow rate is changed according to the quantity. Therefore, more accurate and specific leak detection technology will be needed.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems as described above, receiving flow information from flowmeters installed at two points of an oil pipe, correcting a flowmeter measurement error, and detecting leakage using the flow rate ratio between two points; To provide a device.

In order to achieve the above object, the present invention relates to a leak detection method through correction of a flow meter measurement error that detects leakage by receiving flow information from flow meters installed at two points A and B of an oil pipe. Receiving a flow rate from a flow meter installed in the; (b) obtaining a correction constant between flowmeters installed at the two points; (c) correcting the flow rates at the two points with a correction constant to obtain a flow rate deviation at the two points; (d) determining that the oil is leaked when the flow rate deviation is greater than or equal to the reference value; (e) repeating from the step (a) if the flow rate deviation is less than or equal to the reference value; (f) after step (d), verifying the determination of the leakage using the average flow rate.

In addition, the present invention is a leak detection method through the flow meter error correction, the step (b) is characterized in that it is obtained by using the flow rate average before the reference interval at the time of measuring the flow rate deviation.

In the present invention, in the oil leakage detection method through the correction of the flow meter measurement error, the step (b), the average flow rate of the point A to the average flow rate of the point B as a correction constant at the time point before the reference interval from the measurement point It is characterized by obtaining.

In the present invention, in the oil leakage detection method through the correction of the flow meter measurement error, the step (c), multiplying the flow rate of the point B by the correction constant to obtain the corrected flow rate of the B point, the B point compared to the A point flow rate The ratio of the corrected flow rate is characterized by obtaining the flow rate deviation.

In addition, the present invention is a leak detection method through the correction of the flow meter measurement error, the step (f), (f1) obtaining the average flow rate of point A and the average flow rate of point B after the measurement time; (f2) correcting the average flow rate at point B with the correction constant; (f3) calculating a ratio of the corrected average flow rate at point B to the average flow rate at point A as a deviation of the average flow rate; and (f4) if the deviation of the average flow rate is greater than or equal to the reference value, maintaining the determination of leakage.

In addition, in the present invention, in the oil leakage detection method through the correction of the flow meter measurement error, the step (f) is repeatedly carried out with the average flow rate after the time interval of the average flow rate before (f5), to maintain the leakage judgment more than a limited number of times If so, characterized in that it further comprises the step of determining that the actual leakage.

The present invention also relates to a computer-readable recording medium recording a leak detection method through correction of a flow meter measurement error.

In addition, the present invention relates to a leak detection device through the correction of the flow meter measurement error for detecting the leakage by receiving the flow information from the flow meters installed at the two points A and B of the oil pipe, the correction constant between the flow meters installed at the two points Obtaining a correction constant calculation unit; A flow rate information input unit for receiving a flow rate from a flow meter installed at two points; A flow rate calculation unit for calculating flow rate deviations at two points by correcting the flow rate at two points with a correction constant; An oil leakage judging unit for determining that oil is leaked when the flow rate deviation is greater than or equal to the reference value; It characterized in that it comprises a leakage determination verification unit for verifying that the leakage determination unit determines that the leakage.

In addition, the present invention is characterized in that in the oil leakage detection device through the correction of the flow meter measurement error, the correction constant calculation unit is obtained by using the flow rate average before the reference interval at the time of measuring the flow rate deviation.

In the present invention, in the oil leakage detection device through the correction of the flow meter measurement error, the correction constant calculation unit, the average flow rate of the point A to the average flow rate of the point B as a correction constant at the time point before the reference interval from the measurement time It is characterized by obtaining.

In the present invention, in the oil leakage detection device through the correction of the flow meter measurement error, the flow rate deviation calculation unit, by multiplying the flow rate of the point B by the correction constant to obtain the corrected flow rate of the B point, the flow rate of the B point compared to the A point flow rate It is characterized by obtaining the ratio of the corrected flow rate by the flow rate deviation.

In addition, the present invention, in the oil leakage detection device through the correction of the flow meter measurement error, the leakage determination verification unit, the average flow rate of the point A and the point B flow rate after the measurement point to obtain the average flow rate compared to the average flow rate of the A point The ratio of the average flow rate at point B is determined as the deviation of the average flow rate, and if the variation of the average flow rate is equal to or more than the reference value, the determination of leakage is maintained.

In addition, in the present invention, in the oil leakage detection device through the correction of the flow meter measurement error, the leakage determination verification unit is repeatedly performed with the average flow rate after the time interval of the previous average flow rate, if the oil leakage determination more than a limited number of times, the actual oil leakage Characterized in that it is determined to be.

As described above, according to the method and apparatus for detecting oil leakage through the correction of the flowmeter measurement error according to the present invention, it is possible to easily determine whether the oil is leaked using only the flow rate information, correct the measurement error of the flowmeter, and determine the oil leakage judgment again. By verifying, the effect of more accurately judging leakage can be obtained.

DETAILED DESCRIPTION Hereinafter, specific contents for carrying out the present invention will be described with reference to the drawings.

In addition, in describing this invention, the same code | symbol is attached | subjected and the repeated description is abbreviate | omitted.

First, the entire leak detection system for the implementation of the present invention will be described with reference to FIG.

As shown in Figure 1, as an example for practicing the present invention, the entire leak detection system for the implementation of the present invention is composed of an oil supply pipe 10, flow meters (21, 22), leak detection device (30). In addition, a database 40 for storing necessary data can be further configured.

The oil pipeline 10 connects between the reservoirs 13 capable of storing the fluid 12 such as oil over a long section of several tens or hundreds of kilometers, and a pressurized station 14 at an intermediate point of the connected pipeline 10. ) To maintain the pressure falling over the long section at the correct pressure. Here, the fluid such as oil 12 is any fluid that can flow like water other than oil. In addition, when the fluid is a fluid other than oil, terms related to oil such as an oil pipe, a low oil, and the like, which are described below, may be referred to by changing the term corresponding to the fluid. For example, when the fluid is water, the reservoir may be referred to as a reservoir and the oil pipe may be changed into a water pipe.

The flow meter 20 may be installed at the oil feed point or the arrival point of the oil storage 13 or the pressurized station 14, or may be installed in the middle of the oil feed pipe 10. However, at least two locations should be provided at the point of supply where the fluid 12 flows out and the point of entry where the fluid 12 flows in. The flowmeter 21 at the oil feed point A and the flowmeter 22 at the entry point B measure the flow rates Q _A and Q _B and transmit them to the leak detection device 30. The flowmeter 20 continuously measures the flow rate at a predetermined interval and transmits the measured value in real time to the leak detection device 30. Normally, the flow rate is measured at 1 second intervals.

The leak detection device 30 stores the flow rate data transmitted in real time in the database 40. On the other hand, when the monitoring time interval for the flow rate (Q) is greater than 1 second, that is, in the case of 1 minute, 10 minutes, 1 hour, etc., a value obtained by averaging all the flow rates (Q) measured during the time period is used. However, in order to reduce the measurement error, the average value may be excluded by excluding the maximum value, the minimum value, or the measurement value having a larger deviation than the other measurement values during the time. The leak detection apparatus 30 determines whether there is leakage using the flow rate (Q) information obtained as described above. However, since the determination of leakage is based on the information on the flow rate, leakage can be determined only when the fluid 12 flows into the oil pipe 10.

On the other hand, the transmission interval is determined by the measurement time of the flowmeters 21 and 22, the speed of the communication line between the leak detection device 30 and the flowmeters 21 and 22, the reception speed of the leak detection device 30, and the like. Or it may be determined by the administrator in a policy.

The database 40 is a storage for storing necessary data. The database 40 includes a flow rate information DB 41 for storing measured flow rate information, and a reference information DB 42 for storing leakage of a fluid, a criterion for determining leakage, and the like. However, the configuration of the database 40 is only a preferred embodiment, and in the development of a specific device, it may be configured in a different structure by a database construction theory in view of the ease and efficiency of access and search.

Next, the basic principle of determining the leakage oil through the flow rate measured at two points in the leak detection device 30 will be described. The leak detection according to the present invention is a method of determining whether there is leakage by comparing the flow rates measured at two points in FIG. 1, that is, the oil delivery point A and the arrival point B.

That is, if the point C where leakage occurs between the oil delivery point A and the arrival point B occurs, the flow rate of the arrival point B will be smaller than the flow rate of the oil delivery point A. Therefore, the flow rate measured at point A and the flow rate measured at point B are compared, and if there is a difference, it can be determined as leakage.

However, a problem is that measurement errors of the flow rate measured by the flow meter 20 may occur. While the error of the flow rate measured by the flow meter 20 may be generated by the flow meter itself, it may be caused by the environment of the oil pipe 10. That is, the fluid 12 sent through the oil pipe 10 may be a variety of oil, such as gasoline, kerosene, diesel, aviation oil, the flow rate may vary depending on these types. The biggest change in flow rate depends on the type of oil. In addition, there may be a change in volume even if the same mass due to external requirements such as temperature. Therefore, the flow rate Q _B measured by the flow meter 22 at the arrival point B will be smaller than the flow rate Q _A measured by the flow meter 21 at the oil feed point A. Therefore, the leak detection apparatus 30 should compare the flow rate by correcting this.

Next, a leak detection method through the flowmeter error correction according to an embodiment of the present invention will be described with reference to FIGS. Oil leakage detection method through the flow meter error correction detects the leakage by receiving flow information from the flow meters installed at the two points A and B of the pipeline.

As shown in Figure 2, the leak detection method through the flow meter error correction step a) receiving a flow rate from the flow meters installed at the two points (S10); (b) obtaining a correction constant between flowmeters installed at the two points (S20); (c) calculating flow rate deviations at the two points by correcting the flow rates at the two points with a correction constant (S30); (d) determining that the oil is leaked when the flow rate deviation is greater than or equal to the reference value (S40); (e) repeating the above step (a) if the flow rate deviation is less than or equal to the reference value (S50); (f) After step (d), it is divided into a step (S60) of verifying the determination of leakage. In addition, after step (e), if it is determined that the leakage, it may further include a step (S70) for obtaining the leakage amount. (G) The step of calculating the leakage amount can be further configured.

First, step (a) is a step in which the oil leakage detecting device 30 receives a flow rate from the flow meters 21 and 22 installed at two points A and B of the oil pipe 10 (S10). As seen above, the flow rate measured by the flow meters (21, 22) is continuously transmitted in real time to the leak detection device (30).

Next, step (b) is a step of obtaining a correction constant between flowmeters 21 and 22 at two points (S20). As seen earlier, in order to compare the flow rates measured at two points for leak detection, the measured flow rates must first be corrected. The correction constant introduced to correct the flow rate. The correction constant is defined as the deviation from the flow rate at the two points measured under normal conditions without leakage.

The correction constant uses the flow average before the reference interval at the time of measurement of the flow deviation. That is, the correction constant is obtained from the average flow rate of the A point compared to the average flow rate of the B point at the time before the reference interval from the measurement point.

For example, as shown in FIG. 3, it is assumed that the measurement time point for determining the flow rate deviation is T ₀ , and the reference interval is ΔT b. T- _k-1 is T ₀ - _ΔTb before the reference interval at the time of measurement. The average flow rate at time T ₀ -ΔTb is the average value for a certain time at this time. For example, to state the average interval distance for the _{△ Tm, T 0 - △ Tb} - △ Tm in time T ₀ - the average flow rate of the reference spacing is measured at an earlier time point, the mean value of the flow rate of up to △ Tb.

In Fig. 3, as shown in (a) and (b), the average flow rate used to find the correction constant differs depending on the measurement time point. That is, if the measured time T ₀ (a) is T ₀ - △ Tb - △ in Tm time T ₀ - △ while using the average flow rate to the Tb, if (b) measuring the time of T ₁ of the T ₁ - The average flow rate from TΔ-Tm to T ₁ -ΔTb is used.

The correction constant is obtained from the average flow rate at point A relative to the average flow rate at point B obtained at the previous point in time. Expressed as an expression:

[Equation 1]

As described above, the reason for obtaining the correction constant by using the flow rate at a point before the constant interval (or the reference interval) from the measurement point is due to the measurement error of the flow meters 21 and 22. The flow rate at point A and at point B measured at the previous point in time of the measurement are considered to be the same flow rates. Therefore, the difference between the flow rate at the point A and the flow rate at the point B is regarded as the measurement error of the flow meters 21 and 22.

Next, the step (c) is to calculate the flow rate deviation of the two points by correcting the flow rate of the two points A and B with a correction constant (S30). That is, the corrected flow rate at point B is obtained by multiplying the flow rate at point B by the correction constant, and the ratio of the corrected flow rate at point B to the flow rate at point A is obtained as the flow rate deviation.

That is, the flow rate at point A is set as the reference point and the flow rate at point B is corrected. Preferably, the ratio of the flow rate is used as an example of determining the flow rate deviation. When expressed as an equation, it is the same as [Equation 2].

[Equation 2]

There may be a variety of methods for determining the flow rate deviation. For example, the difference between the flow rate at point A and the corrected flow rate at point B may be determined as the flow rate deviation between the two points.

When the flow rate deviation is obtained, in step (d), it is determined whether the oil leakage is determined based on whether the flow rate deviation is equal to or greater than the reference value (S40). The reference value uses a value input by an administrator or the like. For example, if the reference value is set to 0.2%, it is determined that the oil is leaked when the flow rate deviation exceeds 0.2%.

Step (e) is repeated from step (a) if the flow rate deviation is less than the reference value (S50). In other words, the flow rate is input from the flow meters 21 and 22, and is obtained again from the correction constant between the flow meters 21 and 22.

On the other hand, if it is determined that the flow rate deviation is more than the reference value and the leakage, in step (f), the determination that the leakage is using the average flow rate (S60).

As shown in Figure 4, the step (f) is (f1) calculating the average flow rate of the two points (S61); (f2) correcting the average flow rate with the correction constant (S62); (f3) obtaining a deviation of the average flow rate between the two points (S63); and (f4) if the deviation of the average flow rate is greater than or equal to the reference value, maintaining the determination of leakage of oil (S64). (F6) If the deviation of the average flow rate is equal to or less than the reference value, it is determined that no actual leakage occurs. And preferably, the step (f5) further comprises the step (S65) of repeatedly performing the comparison of the deviation of the average flow rate.

Step (f1) is a step of obtaining the average flow rate at point A and the average flow rate at point B after the measurement point (S61). The average flow rate after the measurement point refers to a value obtained by averaging the value of the flow rate inputted from the measurement point for a predetermined time. As shown in Figure 5 (a), the average flow rate after the measurement point T ₀ is the average value of the flow rate in the interval from T ₀ to T ₀ + Tm.

In the step (f2), the average flow rate at the point B is corrected by the correction constant (S62). As a correction constant, the correction constant obtained at the measurement point T ₀ is used. That is, as shown in Figure 5 _{(a), T 0 - △} Tb - △ Tm in time T ₀ - the correction coefficient against the average flow rate obtained at a ratio of Tb to △. Preferably, the section interval when obtaining the average is used in the same manner as the average section interval when obtaining the correction constant with ΔTm.

In the step (f3), the ratio of the corrected average flow rate of the point B to the average flow rate of the point A is calculated as the deviation of the average flow rate. The equation for calculating the deviation is shown in Equation 2 above. However, substitute the average flow rate at each point instead of the flow rate at each point.

In the step (f4), if the deviation of the average flow rate is greater than or equal to the reference value, it is determined that the oil leakage. The reference value uses the same reference value as the reference value for determining the deviation of the flow rate.

Step (f5) is repeatedly performed with the average flow rate after the time interval of the previous average flow rate, if it is determined that the leakage leakage more than a limited number of times, it is determined that the actual leakage. Otherwise, it is determined that no actual leakage occurs.

That is, as shown in Figs. 5 (a) to 5 (c), the average flow rate is sequentially obtained for each time zone, and the deviation of the average flow rate is obtained to determine the reference value. In this case, the average flow rate at point B is corrected by the correction constant, which is obtained by using the correction constant obtained at the measurement point T ₀ .

Step (g) is a step of calculating the amount of leakage, if it is determined that the actual leakage (not shown). The amount of leakage is calculated by [Equation 3].

[Equation 3]

Also, when calculating the leakage, the flow rate is corrected at the point B using the correction constant. The amount of leakage according to the above equation may be regarded as the amount of leakage calculated under the point A environment.

On the other hand, the steps (a) to (f) repeats the process of determining the leakage by measuring the flow rate continuously while the fluid 12 flows through the oil supply pipe (10). In other words, it is necessary to continuously monitor whether there is oil leakage during oil feeding in real time.

Next, the oil leakage detecting apparatus 30 through the flow meter error correction according to an embodiment of the present invention will be described with reference to FIG. 6 is a block diagram of the configuration of the leak detection device 30 through the flowmeter error correction.

As shown in FIG. 6, the oil leakage detecting device 30 includes a flow rate information input unit 31, a correction constant calculating unit 32, a flow rate deviation calculating unit 33, an oil leakage determining unit 34, and an oil leakage determining unit ( 35). In addition, the oil leakage calculator 36 may be further configured.

The flow rate information input unit 31 receives flow rates from flow meters installed at two points.

The correction constant calculator 32 calculates a correction constant between the flowmeters installed at the two points. In particular, the correction constant calculation unit 32 is obtained by using the flow rate average before the reference interval at the time of measuring the flow rate deviation. Further, the correction constant calculating unit 32 obtains the average flow rate at the point A as the correction constant at the point in time before the reference interval from the measurement point.

The flow rate deviation calculator 33 corrects the flow rates at the two points by the correction constants to obtain the flow rate deviations at the two points. Preferably, the flow rate deviation calculation unit 33 obtains the corrected flow rate at point B by multiplying the flow rate at point B by the correction constant, and calculates the ratio of the corrected flow rate at point B to the flow rate at point A as the flow rate deviation.

The oil leakage determining unit 34 determines that the oil is leaked if the flow rate ratio is higher than or equal to the reference value.

The leak determination unit 35 verifies that the leak determination unit 34 determines that it is leaked. Preferably, the leak determination unit 35 obtains the average flow rate of the point A and the point B flow rate after the measurement point, and calculates the ratio of the average flow rate of the point B to the average flow rate of the point A of the average flow rate If it is calculated | required by the deviation and the said deviation of the said average flow volume is more than the said reference value, it will hold a judgment that it is leaking oil.

Preferably, the leakage determination verification unit 35 repeatedly performs the average flow rate after the time interval of the previous average flow rate, and if it is determined that the leakage leakage determination is more than a limited number of times, it is determined that the actual leakage is made.

On the other hand, when it is determined that the leaked oil amount calculation unit 35 is leaked oil, the leaked oil amount is calculated as shown in [Equation 3].

For the lacking in the above description, refer to the bar described in the oil leakage detection method of the oil pipe according to the present invention described above.

As mentioned above, although the invention made by this inventor was demonstrated concretely according to the said Example, this invention is not limited to the said Example and can be variously changed in the range which does not deviate from the summary.

The present invention is applicable to the development of a system for detecting leakage of oil in the pipeline. In particular, it is possible to apply the development of a system for measuring a simple and accurate leak by using a flow meter installed at both points of the oil pipe and using the information of the flow rate measured by the flow meter.

1 is a diagram illustrating a whole leak detection system for the practice of the present invention.

2 is a flowchart illustrating a leak detection method through correction of a flow meter measurement error according to an exemplary embodiment of the present invention.

3 is an exemplary view for explaining a step of obtaining a correction constant according to an embodiment of the present invention.

4 is a flowchart illustrating a step of verifying leak detection according to an embodiment of the present invention.

5 is an exemplary view for explaining a step of verifying the leakage determination according to an embodiment of the present invention.

6 is a block diagram of a configuration of an oil leakage detecting apparatus through correction of a flow meter measurement error according to an exemplary embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

10: Oil Pipeline 11: Oiled Out Branch

12 fluid 13, 14 reservoir or pressurized station

20: flow meter 21: oil feed point flow meter

22: entry point flow meter 30: oil leakage detection device

31: flow rate information input unit 32: correction constant calculation unit

33: flow deviation calculation unit 34: oil leakage determination unit

35: leak determination unit 36: leakage calculation unit

40: database 41: flow rate information DB

42: reference information DB

Claims (13)

In the oil leakage detection method by correcting the flow meter measurement error to detect the leakage by receiving flow information from the flow meters installed at two points A and B of the oil pipe, (a) receiving a flow rate from a flow meter installed at the two points; (b) obtaining a correction constant between flowmeters installed at the two points; (c) correcting the flow rates at the two points with a correction constant to obtain a flow rate deviation at the two points; (d) determining that the oil is leaked when the flow rate deviation is greater than or equal to the reference value; (e) repeating from the step (a) if the flow rate deviation is less than or equal to the reference value; (f) after step (d), verifying the determination of leakage using the average flow rate; In step (b), From the measurement point to determine the flow rate deviation, before the reference interval, the average flow rate of the point A to the average flow rate of the point B is obtained as a correction constant. Step (f), (f1) obtaining an average flow rate at point A and an average flow rate at point B after the measurement point; (f2) correcting the average flow rate at point B with the correction constant; (f3) calculating a ratio of the corrected average flow rate at point B to the average flow rate at point A as a deviation of the average flow rate; and (f4) if the deviation of the average flow rate is greater than or equal to the reference value, maintaining the determination that the oil is leaking. delete delete The method of claim 1, wherein step (c) comprises: A method for detecting oil leakage through correction of a flow meter measurement error, wherein the flow rate at point B is multiplied by a correction constant to obtain a corrected flow rate at point B, and the ratio of the corrected flow rate at point B to the point A flow rate is calculated as a flow rate deviation. . delete The method of claim 1, wherein step (f) comprises: (f5) by repeatedly performing the average flow rate after the time interval of the previous average flow rate, if it is determined to maintain the leakage leakage more than a limited number of times, through the correction of the flow meter measurement error, characterized in that it further comprises the step of determining that the actual leakage How to detect leakage. A computer-readable recording medium recording a leak detection method by correcting a flowmeter measurement error according to any one of claims 1, 4 and 6. In the oil leakage detection device through the correction of the flow meter measurement error to detect the leakage by receiving flow information from the flow meters installed at two points A and B of the oil pipe, A correction constant calculating unit for obtaining a correction constant between flowmeters installed at the two points; A flow rate information input unit for receiving a flow rate from a flow meter installed at two points; A flow rate calculation unit for calculating flow rate deviations at two points by correcting the flow rate at two points with a correction constant; An oil leakage judging unit for determining that oil is leaked when the flow rate deviation is greater than or equal to the reference value; It includes a leakage determination verification unit for verifying that the leakage determination unit has determined that the leakage of oil, The correction constant calculation unit, From the measurement time point for determining the flow rate deviation, the average flow rate at the point A is compared to the average flow rate at the point B as a correction constant, The leak determination unit, The average flow rate of the point A and the average flow rate of the point B after the measurement point is calculated, and the ratio of the average flow rate of the point B to the average flow rate of the point A is calculated as the deviation of the average flow rate, and the deviation of the average flow rate is greater than or equal to the reference value. On the back side, the leak detection device through the correction of the flow meter measurement error, characterized in that the maintenance of the leak. delete delete The method of claim 8, wherein the flow rate deviation calculation unit, Leakage detection device through correction of flow meter measurement error, characterized by obtaining the corrected flow rate at point B by multiplying the flow rate at point B by the correction constant, and calculating the ratio of the corrected flow rate at point B to the point A flow rate as the flow rate deviation . delete The method of claim 8, wherein the leak determination unit, Repeatedly performing the average flow rate after the time interval of the previous average flow rate, the oil leakage detection device through the correction of the flow meter measurement error, characterized in that it is determined that the actual oil leakage, if the maintenance of more than a limited number of times.

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