JP7111014B2 - Flow measurement system, flow measurement device and flow measurement method - Google Patents

Description

The present invention relates to a flow measurement system, a flow measurement device, and a flow measurement method.

Conventionally, there has been known a relational information setting system that obtains relational information indicating the relation between the flow velocity of a fluid flowing inside a pipe and the temperature distribution on the surface of the pipe (see Patent Documents 1 to 4, for example).
Further, conventionally, there is known a flow rate measurement system for measuring the flow velocity of steam flowing through a pipe (see, for example, Patent Document 5). In the related information setting system described in Patent Document 5,
Conventionally, there has been known a measurement system for measuring at least one of the flow velocity and flow rate of steam flowing through the pipe from the outside of the pipe (see, for example, Patent Document 6).
By the way, the techniques described in Patent Documents 1 to 6 are provided with a heating portion configured by a ring-shaped heater. Therefore, in the techniques described in Patent Documents 1 to 6, a heater is wound around the outer surface of the wall of the pipe in order to obtain the relationship between the flow velocity of the fluid flowing inside the pipe and the temperature distribution on the surface of the pipe. must be installed.

WO2018/142475 WO2018/142456 JP 2017-053758 A JP 2017-053757 A WO2015/119139 JP 2016-212030 A

In view of the above problems, the present invention provides a flow rate measurement system, a flow rate measurement device, and a flow rate measurement method that can obtain the velocity of a fluid flowing through a pipe without the need to install a heater on the outer surface of the wall of the pipe. intended to provide

In one aspect of the present invention, a laser light irradiation unit that irradiates a laser light to a laser light irradiation point, which is one point on the outer surface of a wall of a pipe through which a fluid flows, and a laser light is irradiated by the laser light irradiation unit. a temperature distribution calculation unit that calculates the temperature distribution of the outer surface; and a heat transfer numerical analysis that outputs at least the relationship between the velocity of the fluid flowing through the pipe and the temperature distribution of the outer surface based on the information of the pipe.・ Based on the temperature distribution of the outer surface calculated by the CFD analysis unit, the temperature distribution calculation unit, and the relationship output by the heat transfer numerical analysis/CFD analysis unit, and a fluid velocity calculator that calculates velocity.

The flow rate measuring device according to one aspect of the present invention further includes a thermo-image capturing unit configured to capture a thermo-image of the outer surface irradiated with the laser beam by the laser-beam irradiating unit, wherein the temperature distribution calculation unit captures the thermo-image The temperature distribution of the outer surface may be calculated based on the thermo image captured by the imaging unit.

In one aspect of the present invention, a laser light irradiation unit that irradiates a laser light to a laser light irradiation point, which is one point on the outer surface of a wall of a pipe through which a fluid flows, and a laser light is irradiated by the laser light irradiation unit. a temperature change calculation unit for calculating a temperature change over time of the outer surface; and a transmitter that outputs a relationship between at least the velocity of the fluid flowing through the pipe and the temperature change over time of the outer surface based on the information of the pipe. Based on the thermal numerical analysis/CFD analysis unit, the temperature change over time of the outer surface calculated by the temperature change calculation unit over time, and the relationship output by the heat transfer numerical analysis/CFD analysis unit, the piping and a fluid velocity calculator that calculates the velocity of a fluid flowing therein.

The flow rate measuring device according to one aspect of the present invention further includes a thermo image capturing unit configured to capture a thermo image of the outer surface irradiated with the laser light by the laser light irradiating unit, wherein the temperature change calculation unit The temperature change over time of the outer surface may be calculated based on the change over time of the thermo-image captured by the image capturing unit.

In the flow measurement device according to one aspect of the present invention, the outer surface of the wall portion of the pipe is covered with a heat insulating material, and the heat insulating material transmits the laser light irradiated by the laser light irradiation section. A transmission part may be provided.

In the flow rate measuring device according to one aspect of the present invention, the outer surface of the wall portion of the pipe is covered with a windshield member, and the windshield member blocks the laser beam irradiated by the laser beam irradiation unit. A transparent portion may be provided.

In one aspect of the present invention, a laser light irradiation unit that irradiates a laser light to a laser light irradiation point, which is one point on the outer surface of a wall of a pipe through which a fluid flows, and a laser light is irradiated by the laser light irradiation unit. a temperature distribution detector that detects the temperature distribution of the outer surface; and a heat transfer numerical analysis that outputs at least the relationship between the velocity of the fluid flowing through the pipe and the temperature distribution of the outer surface based on the information of the pipe.・ Based on the temperature distribution of the outer surface detected by the CFD analysis unit, the temperature distribution detection unit, and the relationship output by the heat transfer numerical analysis/CFD analysis unit, and a fluid velocity calculator that calculates velocity.

In one aspect of the flow measurement device of the present invention, the temperature distribution detection unit may include a plurality of thermocouples arranged in a pipe axis direction of the pipe.

In one aspect of the present invention, a laser light irradiation unit that irradiates a laser light to a laser light irradiation point, which is one point on the outer surface of a wall of a pipe through which a fluid flows, and a laser light is irradiated by the laser light irradiation unit. a temperature change detector for detecting a change in temperature of the outer surface with time; and a transmission for outputting a relationship between at least the velocity of the fluid flowing through the pipe and the temperature change with time of the outer surface based on the information of the pipe. Based on the thermal numerical analysis/CFD analysis unit, the temperature change over time of the outer surface detected by the temperature change detection unit, and the relationship output by the heat transfer numerical analysis/CFD analysis unit, the piping and a fluid velocity calculator that calculates the velocity of a fluid flowing therein.

In one aspect of the flow measurement device of the present invention, the temperature change detection unit may include a thermocouple arranged near the laser beam irradiation point.

One aspect of the present invention is a flow measuring device for measuring the velocity of fluid flowing in a pipe, and based on information on the pipe, at least the velocity of the fluid flowing in the pipe and the temperature of the outer surface of the wall of the pipe. A flow measurement system comprising a heat transfer numerical analysis/CFD analysis unit that outputs a relationship with a distribution, wherein the flow measurement device irradiates a laser beam to a laser beam irradiation point that is one point on the outer surface A laser light irradiation unit, a temperature distribution calculation unit that calculates the temperature distribution of the outer surface irradiated with the laser light by the laser light irradiation unit, and the heat transfer numerical analysis/CFD analysis unit. A fluid that calculates the velocity of the fluid flowing through the pipe based on the stored database unit, the temperature distribution of the outer surface calculated by the temperature distribution calculation unit, and the relationship stored in the database unit and a velocity calculator.

In the flow measurement system according to one aspect of the present invention, the flow measurement device further includes a thermo-image capturing unit that captures a thermo-image of the outer surface irradiated with the laser light by the laser light irradiation unit, and the temperature distribution calculation is performed. The unit may calculate the temperature distribution of the outer surface based on the thermo image captured by the thermo image capturing unit.

One aspect of the present invention is a flow measuring device for measuring the velocity of fluid flowing in a pipe, and based on information on the pipe, at least the velocity of the fluid flowing in the pipe and the temperature of the outer surface of the wall of the pipe. A flow measurement system comprising a heat transfer numerical analysis/CFD analysis unit that outputs a relationship with aging, wherein the flow measurement device irradiates a laser beam to a laser beam irradiation point that is one point on the outer surface a laser light irradiation unit, a temperature change calculation unit for calculating the temperature change over time of the outer surface irradiated with the laser light by the laser light irradiation unit, and the heat transfer numerical analysis/CFD analysis unit output in advance A database unit that stores the relationship, a change in temperature of the outer surface over time calculated by the temperature change calculation unit over time, and the relationship stored in the database unit are used to determine the flow rate of the fluid flowing through the pipe. and a fluid velocity calculator that calculates velocity.

In the flow measurement system of one aspect of the present invention, the flow measurement device further includes a thermo-image capturing unit that captures a thermo-image of the outer surface irradiated with the laser light by the laser light irradiation unit, and the temperature change over time The calculation unit may calculate the temperature change over time of the outer surface based on the change over time of the thermo-image captured by the thermo-image capturing unit.

One aspect of the present invention is a flow measuring device for measuring the velocity of fluid flowing in a pipe, and based on information on the pipe, at least the velocity of the fluid flowing in the pipe and the temperature of the outer surface of the wall of the pipe. A flow measurement system comprising a heat transfer numerical analysis/CFD analysis unit that outputs a relationship with a distribution, wherein the flow measurement device irradiates a laser beam to a laser beam irradiation point that is one point on the outer surface A laser light irradiation unit, a temperature distribution detection unit that detects the temperature distribution of the outer surface irradiated with the laser light by the laser light irradiation unit, and the heat transfer numerical analysis/CFD analysis unit. A fluid that calculates the velocity of the fluid flowing through the pipe based on a database unit that stores the fluid, the temperature distribution of the outer surface detected by the temperature distribution detection unit, and the relationship stored in the database unit. and a velocity calculator.

In one aspect of the flow measurement system of the present invention, the temperature distribution detection unit may include a plurality of thermocouples arranged in a pipe axis direction of the pipe.

One aspect of the present invention is a flow measuring device for measuring the velocity of fluid flowing in a pipe, and based on information on the pipe, at least the velocity of the fluid flowing in the pipe and the temperature of the outer surface of the wall of the pipe. A flow measurement system comprising a heat transfer numerical analysis/CFD analysis unit that outputs a relationship with aging, wherein the flow measurement device irradiates a laser beam to a laser beam irradiation point that is one point on the outer surface a laser light irradiation unit, a temperature change detection unit for detecting a temperature change over time of the outer surface irradiated with the laser light by the laser light irradiation unit, and the heat transfer numerical analysis/CFD analysis unit output in advance A database unit that stores the relationship, a change in temperature of the outer surface over time detected by the temperature change detection unit over time, and the relationship stored in the database unit are used to determine the flow rate of the fluid flowing through the pipe. and a fluid velocity calculator that calculates velocity.

In one aspect of the flow measurement system of the present invention, the temperature change detection unit may include a thermocouple arranged near the laser beam irradiation point.

One aspect of the present invention includes a laser light irradiation step of irradiating a laser light irradiation point, which is one point on the outer surface of a wall of a pipe through which a fluid flows, with a laser light, and the laser light is irradiated in the laser light irradiation step. a temperature distribution calculation step of calculating the temperature distribution of the outer surface, and a heat transfer numerical analysis of outputting at least the relationship between the velocity of the fluid flowing in the pipe and the temperature distribution of the outer surface based on the information of the pipe. - Based on the CFD analysis step, the temperature distribution of the outer surface calculated in the temperature distribution calculation step, and the relationship output in the heat transfer numerical analysis/CFD analysis step, and a fluid velocity calculation step of calculating the velocity.

One aspect of the present invention includes a laser light irradiation step of irradiating a laser light irradiation point, which is one point on the outer surface of a wall of a pipe through which a fluid flows, with a laser light, and the laser light is irradiated in the laser light irradiation step. a temperature change calculation step of calculating a temperature change over time of the outer surface; and a transmission for outputting a relationship between at least the velocity of the fluid flowing through the pipe and the temperature change over time of the outer surface based on the information of the pipe. Based on the thermal numerical analysis/CFD analysis step, the temperature temporal change of the outer surface calculated in the temperature temporal change calculation step, and the relationship output in the heat transfer numerical analysis/CFD analysis step, the piping and a fluid velocity calculating step of calculating the velocity of the fluid flowing through the flow measuring method.

One aspect of the present invention includes a laser light irradiation step of irradiating a laser light irradiation point, which is one point on the outer surface of a wall of a pipe through which a fluid flows, with a laser light, and the laser light is irradiated in the laser light irradiation step. a temperature distribution detection step of detecting the temperature distribution of the outer surface, and a heat transfer numerical analysis of outputting at least the relationship between the velocity of the fluid flowing through the pipe and the temperature distribution of the outer surface based on the information of the pipe.・Based on the CFD analysis step, the temperature distribution of the outer surface detected in the temperature distribution detection step, and the relationship output in the heat transfer numerical analysis/CFD analysis step, and a fluid velocity calculation step of calculating the velocity.

One aspect of the present invention includes a laser light irradiation step of irradiating a laser light irradiation point, which is one point on the outer surface of a wall of a pipe through which a fluid flows, with a laser light, and the laser light is irradiated in the laser light irradiation step. a temperature change detection step of detecting a temperature change over time of the outer surface; and a transmission for outputting a relationship between at least the velocity of the fluid flowing through the pipe and the temperature change of the outer surface over time based on the information of the pipe. Based on the thermal numerical analysis/CFD analysis step, the temperature temporal change of the outer surface detected in the temperature temporal change detection step, and the relationship output in the heat transfer numerical analysis/CFD analysis step, the piping and a fluid velocity calculating step of calculating the velocity of the fluid flowing through the flow measuring method.

Advantageous Effects of Invention According to the present invention, it is possible to provide a flow measurement system, a flow measurement device, and a flow measurement method capable of obtaining the velocity of a fluid flowing through a pipe without the need to install a heater on the outer surface of the wall of the pipe. .

It is a figure which shows the 1st example of the flow measuring device of 1st Embodiment. FIG. 4 is a diagram for explaining an example of the relationship between the velocity of fluid flowing through a pipe and the temperature distribution on the outer surface of the wall of the pipe; 5 is a flowchart for explaining an example of processing in a heat transfer numerical analysis/CFD analysis unit and a fluid velocity calculation unit; 4 is a flowchart for explaining an example of processing executed in the flow rate measuring device of the first embodiment; It is a figure which shows the 2nd example of the flow measuring device of 1st Embodiment. It is a figure which shows the 3rd example of the flow measuring device of 1st Embodiment. It is a figure which shows the 1st example of the flow measuring device of 2nd Embodiment. It is a figure for demonstrating an example of the temperature change with time of the outer surface of the wall part of piping calculated by the temperature change calculation part with time. 9 is a flowchart for explaining an example of processing in a heat transfer numerical analysis/CFD analysis unit and a fluid velocity calculation unit of the flow rate measuring device of the second embodiment; 9 is a flowchart for explaining an example of processing executed in the flow rate measuring device of the second embodiment; It is a figure which shows the 1st example of the flow measuring device of 3rd Embodiment. FIG. 11 is a flowchart for explaining an example of processing in a heat transfer numerical analysis/CFD analysis unit and a fluid velocity calculation unit of the flow measurement device of the third embodiment; FIG. It is a flow chart for explaining an example of processing performed in a flow measuring device of a 3rd embodiment. It is a figure which shows the 1st example of the flow measuring device of 4th Embodiment. FIG. 12 is a flow chart for explaining an example of processing in a heat transfer numerical analysis/CFD analysis unit and a fluid velocity calculation unit of the flow measurement device of the fourth embodiment; FIG. It is a flow chart for explaining an example of processing performed in a flow measuring device of a 4th embodiment. It is a figure which shows the 1st example of the flow measurement system of 5th Embodiment. FIG. 14 is a flowchart for explaining an example of processing executed in the flow rate measurement system of the fifth embodiment; FIG. It is a figure which shows the 1st example of the flow measurement system of 6th Embodiment. FIG. 14 is a flowchart for explaining an example of processing executed in the flow rate measurement system of the sixth embodiment; FIG. It is a figure which shows the 1st example of the flow measurement system of 7th Embodiment. FIG. 14 is a flowchart for explaining an example of processing executed in the flow rate measurement system of the seventh embodiment; FIG. It is a figure which shows the 1st example of the flow measurement system of 8th Embodiment. FIG. 20 is a flowchart for explaining an example of processing executed in the flow rate measurement system of the eighth embodiment; FIG.

EMBODIMENT OF THE INVENTION Hereinafter, with reference to drawings, embodiment of the flow measurement system of this invention, a flow measurement apparatus, and the flow measurement method is described.

[First embodiment]
FIG. 1 is a diagram showing a first example of the flow rate measuring device 1 of the first embodiment.
In the example shown in FIG. 1, the flow measuring device 1 measures the velocity of fluid (for example, steam, gas, etc.) flowing through the pipe A. In the example shown in FIG. The flow measurement device 1 includes, for example, a laser beam irradiation unit 11, a thermographic imaging unit 12, a temperature distribution calculation unit 13A, a heat transfer numerical analysis/CFD (Computational Fluid Dynamics) analysis unit 14, and a fluid velocity calculation unit 15. It has
The laser beam irradiation unit 11 irradiates a laser beam to a laser beam irradiation point A11B, which is one point on the outer surface A11 of the wall portion A1 of the pipe A, to heat the fluid in the pipe A. As shown in FIG.
The thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall portion A1 of the pipe A irradiated with laser light by the laser light irradiation unit 11 .
In the example shown in FIG. 1, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall portion A1 of the pipe A while the laser light emitting unit 11 is emitting laser light. In another example, the thermo-image capturing unit 12 may capture a thermo-image of the outer surface A11 of the wall portion A1 of the pipe A after the laser light irradiation unit 11 has finished irradiating the laser light.

In the example shown in FIG. 1 , the temperature distribution calculator 13A calculates the temperature distribution of the outer surface A11 of the wall A1 of the pipe A based on the thermo-image captured by the thermo-image capturing unit 12 . Specifically, the temperature distribution calculator 13A calculates the temperature distribution within the photographing area A11A of the outer surface A11 of the wall A1 of the pipe A photographed by the thermo-image photographing unit 12 .
In the example shown in FIG. 1, the laser beam irradiation point A11B is positioned within the imaging area A11A, but in other examples, the laser beam irradiation point A11B may be positioned outside the imaging area A11A.

In the example shown in FIG. 1, the heat transfer numerical analysis/CFD analysis unit 14, for example, based on information about the pipe A such as the outer diameter of the pipe A, the thickness of the wall A1 of the pipe A, the material of the pipe A, etc. , the relationship between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A, and the like. The heat transfer numerical analysis/CFD analysis unit 14 outputs a plurality of relationships between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. FIG. That is, the heat transfer numerical analysis/CFD analysis unit 14, for example, determines the relationship between the velocity of the fluid and the temperature distribution when the velocity of the fluid flowing in the pipe A is the first velocity (first relationship), the inside of the pipe A The relationship between the velocity of the fluid and the temperature distribution when the velocity of the flowing fluid is the second velocity (second relationship), the velocity and the temperature distribution of the fluid when the velocity of the fluid flowing in the pipe A is the third velocity (third relationship) and the like are output.
In the example shown in FIG. 1, the heat transfer numerical analysis/CFD analysis unit 14 calculates the flow velocity in the pipe A and the outer surface of the wall A1 of the pipe A when the wind does not hit the outer surface A11 of the wall A1 of the pipe A. Output the relationship with the temperature distribution of A11.
In another example, when wind hits the outer surface A11 of the wall A1 of the pipe A, the amount of heat lost by the outer surface A11 of the wall A1 of the pipe A due to the wind is calculated in advance by preliminary experiments, analysis, or the like. The heat transfer numerical analysis/CFD analysis unit 14 considers the amount of heat calculated in advance by preliminary experiments, analyses, etc., and calculates the relationship between the flow velocity in the pipe A and the temperature distribution on the outer surface A11 of the wall A1 of the pipe A. Output.

FIG. 2 is a diagram for explaining an example of the relationship between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. FIG. Specifically, FIG. 2A is a diagram showing the flow of heat from the laser beam irradiation point A11B to the fluid in the pipe A when the flow velocity in the pipe A is the first speed. FIG. 2B is a diagram showing the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A when the flow velocity in the pipe A is the first velocity. FIG. 2C is a diagram showing the flow of heat from the laser beam irradiation point A11B to the fluid in the pipe A when the flow velocity in the pipe A is the second speed (<the first speed). FIG. 2D is a diagram showing the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A when the flow velocity inside the pipe A is the second velocity.
The horizontal axes of FIGS. 2B and 2D indicate the position of the pipe A in the pipe axis direction. That is, the position in the left-right direction in FIG. 2A corresponds to the position on the horizontal axis in FIG. 2B. Also, the position in the left-right direction in FIG. 2(C) corresponds to the position on the horizontal axis in FIG. 2(D). That is, the maximum value in FIG. 2B indicates the temperature at the laser beam irradiation point A11B when the flow velocity in the pipe A is the first velocity. The maximum value in FIG. 2D indicates the temperature at the laser beam irradiation point A11B when the flow velocity in the pipe A is the second velocity.
As shown in FIG. 2A, when the flow velocity in the pipe A is high, the heat transfer in the pipe increases, and the amount of heat conducted in the axial direction of the wall A1 of the pipe A decreases. On the other hand, as shown in FIG. 2C, when the flow velocity in the pipe A is low, the heat transfer in the pipe decreases, and the amount of heat conducted in the axial direction of the wall A1 of the pipe A increases. Therefore, as shown in FIGS. 2(B) and 2(D), the temperature at the laser beam irradiation point A11B when the flow velocity in the pipe A is high (the maximum value in FIG. 2(B)) is It is lower than the temperature of the laser beam irradiation point A11B (the maximum value in FIG. 2(D)) when the flow velocity is small. Specifically, when the flow velocity in the pipe A is high, a temperature distribution with a low maximum temperature and a small width is generated on the outer surface A11 of the wall A1 of the pipe A, as shown in FIG. 2(B). On the other hand, when the flow velocity in the pipe A is low, as shown in FIG. 2(D), the maximum temperature is high on the outer surface A11 of the wall portion A1 of the pipe A, and a wide temperature distribution occurs.

In the example shown in FIG. 1, the heat transfer numerical analysis/CFD analysis unit 14 performs numerical analysis for observing the flow of the fluid in the pipe A by solving, for example, an equation relating to the motion of the fluid (such as the Euler equation) on a computer. Run.
The heat transfer numerical analysis/CFD analysis unit 14 executes numerical analysis by, for example, preprocessing, analysis, and postprocessing procedures. In the preprocessing, a three-dimensional model or a two-dimensional model that reproduces the shape of the pipe A is created based on information about the pipe A, for example. Since space is treated discretely in computational fluid dynamics (CFD), it is necessary to discretize the object shape and the surrounding space. Therefore, in the preprocessing, a lattice (grid, mesh) is generated for discretizing and representing the pipe A and the surrounding space.
In the analysis, the computer performs iterative calculations to calculate an approximate solution of the flow equation for each grid. As a result of the calculation, the flow velocity, temperature, etc. for each grid are obtained. In the post-processing, for example, the relationship between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A is output as numerical values.

In the example shown in FIG. 1, the fluid velocity calculation unit 15 outputs the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A calculated by the temperature distribution calculation unit 13A and the heat transfer numerical analysis/CFD analysis unit 14. Calculate the velocity of the fluid flowing in the pipe A based on the relationship (more specifically, a plurality of relationships) between the velocity of the fluid flowing in the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. do.
The fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output by the heat transfer numerical analysis/CFD analysis unit 14, and compares the relationship with the temperature distribution calculation unit. The flow velocity in the pipe A is calculated based on the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A calculated by 13A.

FIG. 3 is a flow chart for explaining an example of processing in the heat transfer numerical analysis/CFD analysis unit 14 and the fluid velocity calculation unit 15. As shown in FIG.
In the example shown in FIG. 3, in step S11, for example, the user of the flow rate measuring device 1 sends the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A calculated by the temperature distribution calculator 13A to the fluid velocity calculator 15. input. In another example, the temperature distribution calculator 13A may input the calculated temperature distribution to the fluid velocity calculator 15 .

In the example shown in FIG. 3, in step S12, for example, the user of the flow measurement device 1 determines, for example, the outer diameter of the pipe A, the thickness of the wall portion A1 of the pipe A, the material of the pipe A, the laser beam irradiation unit 11 , and the characteristics of the fluid flowing through pipe A are input.
Next, in step S13, for example, the user of the flow rate measuring device 1 inputs the initial flow velocity in the pipe A (eg, 20 [m/s]).
Next, in step S14, the heat transfer numerical analysis/CFD analysis unit 14 outputs a plurality of relationships between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. The fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output by the heat transfer numerical analysis/CFD analysis unit 14, and calculates the temperature distribution indicated by the relationship. obtain.
Next, in step S15, the fluid velocity calculation unit 15 calculates the temperature distribution input in step S11 (temperature distribution calculated by the temperature distribution calculation unit 13A) and the temperature distribution obtained in step S14 (heat transfer numerical analysis/ temperature distribution indicated by the relationship output by the CFD analysis unit 14). If the temperature distribution (input temperature distribution) input in step S11 is higher than the temperature distribution (output temperature distribution) obtained in step S14, the process proceeds to step S16. If the temperature distribution (input temperature distribution) input in step S11 is lower than the temperature distribution (output temperature distribution) obtained in step S14, the process proceeds to step S17. If the temperature distribution input in step S11 (input temperature distribution) matches the temperature distribution obtained in step S14 (output temperature distribution), the process proceeds to step S18.

In step S16, the fluid velocity calculator 15 calculates the velocity of the fluid flowing in the pipe A by reducing the flow velocity in the pipe A indicated by the one relationship selected in step S14.
In step S17, the fluid velocity calculator 15 calculates the velocity of the fluid flowing in the pipe A by increasing the flow velocity in the pipe A indicated by the one relationship selected in step S14.
In step S18, the fluid velocity calculator 15 calculates the flow velocity in the pipe A indicated by the one relationship selected in step S14 as the velocity of the fluid flowing in the pipe A. FIG.

FIG. 4 is a flowchart for explaining an example of processing executed in the flow rate measuring device 1 of the first embodiment, including the processing shown in FIG.
In the example shown in FIG. 4, in step S101, the laser light irradiation unit 11 irradiates a laser light irradiation point A11B, which is one point on the outer surface A11 of the wall portion A1 of the pipe A, with laser light.
Next, in step S102, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall portion A1 of the pipe A.
Next, in step S103, the temperature distribution calculator 13A calculates the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A based on the thermographic image captured in step S102.
Next, in step S104, based on the information about the pipe A, the heat transfer numerical analysis/CFD analysis unit 14 calculates the velocity of the fluid flowing in the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. output the relationship between
Next, in step S105, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output in step S104, and the relationship calculated in step S103. The velocity of the fluid flowing through the pipe A is calculated based on the temperature distribution obtained.

In the first example of the flow rate measuring device 1 of the first embodiment, the fluid in the pipe A is heated by the laser beam irradiated by the laser beam irradiation unit 11, so a heater is provided on the outer surface A11 of the wall portion A of the pipe A. The velocity of the fluid flowing in pipe A can be obtained without the need for installation.

FIG. 5 is a diagram showing a second example of the flow rate measuring device 1 of the first embodiment.
In the example shown in FIG. 5, the flow rate measuring device 1 is configured similarly to the flow rate measuring device 1 shown in FIG.
Moreover, in the example shown in FIG. The heat insulating material B has a transmission portion B1 through which the laser beam irradiated by the laser beam irradiation portion 11 is transmitted.
Specifically, in the example shown in FIG. That is, the transmission part B1 is an air layer.
In another example, as the transparent portion B1 of the heat insulating material B, for example, a transparent heat insulating material containing 98% air may be used.

FIG. 6 is a diagram showing a third example of the flow rate measuring device 1 of the first embodiment.
In the example shown in FIG. 6, the flow rate measuring device 1 is configured similarly to the flow rate measuring device 1 shown in FIG.
Moreover, in the example shown in FIG. The windshield member C has a transmission portion C1 through which the laser beam irradiated by the laser beam irradiation portion 11 is transmitted. The transmission part C1 is configured by an opening formed in the windshield member C. As shown in FIG.

[Second embodiment]
A second embodiment of the flow rate measuring system, the flow rate measuring device, and the flow rate measuring method of the present invention will be described below.
The flow rate measuring device 1 of the second embodiment is configured in the same manner as the flow rate measuring device 1 of the first embodiment described above, except for the points described later. Therefore, according to the flow rate measuring device 1 of the second embodiment, it is possible to achieve the same effects as the flow rate measuring device 1 of the first embodiment described above, except for the points described later.

FIG. 7 is a diagram showing a first example of the flow rate measuring device 1 of the second embodiment.
In the example shown in FIG. 1, the flow measurement device 1 includes the temperature distribution calculation unit 13A, but in the example shown in FIG. 13B.
As described above, in the example shown in FIG. 1, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall A1 of the pipe A while the laser beam is being irradiated by the laser beam irradiation unit 11. do.
On the other hand, in the example shown in FIG. 7, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall portion A1 of the pipe A after the laser light irradiation unit 11 finishes irradiating the laser light. Specifically, the thermo-image capturing unit 12 captures thermo-images of the outer surface A11 at a plurality of times in order to obtain temporal changes in the thermo-image of the outer surface A11.
In the example shown in FIG. 7, the temperature change calculation unit 13B calculates the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A based on the change over time of the thermo-image captured by the thermo-image capturing unit 12. .

FIG. 8 is a diagram for explaining an example of the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A calculated by the temperature change over time calculator 13B.
In the example shown in FIG. 8, the laser beam irradiation unit 11 starts irradiating the laser beam irradiation point A11B on the outer surface A11 of the wall portion A1 of the pipe A with the laser beam at the time t1.
Next, at time t2, the laser beam irradiation unit 11 finishes irradiating the laser beam irradiation point A11B with the laser beam, and the temperature of the outer surface A11 of the wall portion A1 of the pipe A begins to decrease.
Next, at time t3, the temperature of the outer surface A11 of the wall A1 of the pipe A reaches equilibrium.
For example, the temperature change calculation unit 13B calculates a time constant, which is the time from time t2 when the temperature of the outer surface A11 begins to decrease to time t3 when the temperature of the outer surface A11 reaches equilibrium, as the temperature change over time of the outer surface A11. calculate.
When the flow velocity in the pipe A is higher than the example shown in FIG. 8, the time constant calculated by the temperature change calculator 13B becomes smaller than the example shown in FIG. That is, as the flow velocity in the pipe A increases, the time constant calculated by the temperature change calculation unit 13B decreases.

In the example shown in FIG. 7, the heat transfer numerical analysis/CFD analysis unit 14, for example, based on information about the pipe A such as the outer diameter of the pipe A, the thickness of the wall A1 of the pipe A, the material of the pipe A, etc. , the relationship between the velocity of the fluid flowing in the pipe A and the temperature change over time of the outer surface A11 of the wall A1 of the pipe A, and the like. The heat transfer numerical analysis/CFD analysis unit 14 outputs a plurality of relationships between the velocity of the fluid flowing through the pipe A and the change in temperature of the outer surface A11 of the wall A1 of the pipe A with time. That is, the heat transfer numerical analysis/CFD analysis unit 14, for example, when the velocity of the fluid flowing in the pipe A is the first velocity, the relationship between the velocity of the fluid and the temperature change with time (first relationship), The relationship between the speed of the fluid and the change in temperature over time (second relationship) when the speed of the fluid flowing through is the second speed, and the speed of the fluid when the speed of the fluid flowing in the pipe A is the third speed A relationship (third relationship) and the like with temperature change over time are output.
In the example shown in FIG. 7, the heat transfer numerical analysis/CFD analysis unit 14 calculates the flow velocity in the pipe A and the outer surface of the wall A1 of the pipe A when the wind does not hit the outer surface A11 of the wall A1 of the pipe A. Output the relationship with the temperature change over time of A11.
In another example, when wind hits the outer surface A11 of the wall A1 of the pipe A, the amount of heat lost by the outer surface A11 of the wall A1 of the pipe A due to the wind is calculated in advance by preliminary experiments, analysis, or the like. The heat transfer numerical analysis/CFD analysis unit 14 considers the amount of heat calculated in advance by preliminary experiments, analyses, etc., and considers the relationship between the flow velocity in the pipe A and the temperature change over time of the outer surface A11 of the wall A1 of the pipe A. to output

In the example shown in FIG. 7, the fluid velocity calculation unit 15 calculates the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A calculated by the temperature change calculation unit 13B, and the heat transfer numerical analysis/CFD analysis unit 14 Based on the relationship (more specifically, a plurality of relationships) between the output speed of the fluid flowing in the pipe A and the temperature change of the outer surface A11 of the wall A1 of the pipe A, the Calculate speed.
The fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output by the heat transfer numerical analysis/CFD analysis unit 14, and calculates the temperature change over time with that relationship. The flow velocity in the pipe A is calculated based on the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A calculated by the section 13B.

FIG. 9 is a flow chart for explaining an example of processing in the heat transfer numerical analysis/CFD analysis unit 14 and the fluid velocity calculation unit 15 of the flow measurement device 1 of the second embodiment.
In the example shown in FIG. 9, in step S21, for example, the user of the flow rate measuring device 1 calculates the temperature change (time constant) of the outer surface A11 of the wall portion A1 of the pipe A calculated by the temperature change calculation unit 13B. Input to the fluid velocity calculator 15 . In another example, the temperature change over time calculator 13</b>B may input the calculated temperature change over time (time constant) to the fluid velocity calculator 15 .

In the example shown in FIG. 9, in step S22, for example, the user of the flow measurement device 1 determines, for example, the outer diameter of the pipe A, the thickness of the wall portion A1 of the pipe A, the material of the pipe A, the laser beam irradiation part 11 , and the characteristics of the fluid flowing through pipe A are input.
Next, in step S23, for example, the user of the flow rate measuring device 1 inputs the initial flow velocity in the pipe A (eg, 20 [m/s]).
Next, in step S24, the heat transfer numerical analysis/CFD analysis unit 14 calculates a plurality of relationships between the velocity of the fluid flowing in the pipe A and the temperature change (time constant) of the outer surface A11 of the wall portion A1 of the pipe A over time. Output. The fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output by the heat transfer numerical analysis/CFD analysis unit 14, and calculates the temperature change over time indicated by the relationship. (time constant) is obtained.
Next, in step S25, the fluid velocity calculation unit 15 calculates the temperature change over time input in step S21 (the temperature change over time (time constant) calculated by the temperature change calculation unit 13B) and the temperature obtained in step S24. The change over time (temperature change over time (time constant) indicated by the relationship output by the heat transfer numerical analysis/CFD analysis unit 14) is compared. If the temperature change over time (input time constant) input in step S21 is greater than the temperature change over time (output time constant) obtained in step S24, the process proceeds to step S26. If the temperature change over time (input time constant) input in step S21 is smaller than the temperature change over time (output time constant) obtained in step S24, the process proceeds to step S27. If the temperature change over time (input time constant) input in step S21 matches the temperature change over time (output time constant) obtained in step S24, the process proceeds to step S28.

In step S26, the fluid velocity calculator 15 calculates the velocity of the fluid flowing in the pipe A by reducing the flow velocity in the pipe A indicated by the one relationship selected in step S24.
In step S27, the fluid velocity calculator 15 calculates the velocity of the fluid flowing in the pipe A by increasing the flow velocity in the pipe A indicated by the one relationship selected in step S24.
In step S28, the fluid velocity calculator 15 calculates the flow velocity in the pipe A indicated by the one relationship selected in step S24 as the velocity of the fluid flowing in the pipe A. FIG.

FIG. 10 is a flowchart for explaining an example of processing executed in the flow rate measuring device 1 of the second embodiment, including the processing shown in FIG.
In the example shown in FIG. 10, in step S201, the laser light irradiation unit 11 irradiates a laser light irradiation point A11B, which is one point on the outer surface A11 of the wall portion A1 of the pipe A, with laser light.
Next, in step S202, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall portion A1 of the pipe A.
Next, in step S203, the temperature temporal change calculator 13B calculates the temperature temporal change (time constant) of the outer surface A11 of the wall portion A1 of the pipe A based on the temporal change of the thermo-image captured in step S202. .
Next, in step S204, based on the information about the pipe A, the heat transfer numerical analysis/CFD analysis unit 14 determines the velocity of the fluid flowing in the pipe A and the temperature change (time constant).
Next, in step S205, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output in step S204, and the relationship calculated in step S203. The velocity of the fluid flowing through the pipe A is calculated based on the time-dependent temperature change (time constant).

In the first example of the flow rate measuring device 1 of the second embodiment, the fluid in the pipe A is heated by the laser light irradiated by the laser light irradiation unit 11, so a heater is provided on the outer surface A11 of the wall A of the pipe A. The velocity of the fluid flowing in pipe A can be obtained without the need for installation.

In a second example of the flow rate measuring device 1 of the second embodiment, the flow rate measuring device 1 is configured similarly to the flow rate measuring device 1 shown in FIG.
In addition, in the second example of the flow rate measuring device 1 of the second embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is made of the heat insulating material B configured similarly to the heat insulating material B shown in FIG. covered.

In a third example of the flow rate measuring device 1 of the second embodiment, the flow rate measuring device 1 is configured similarly to the flow rate measuring device 1 shown in FIG.
Further, in the third example of the flow rate measuring device 1 of the second embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is a windshield member C configured similarly to the windshield member C shown in FIG. covered by

[Third embodiment]
A third embodiment of the flow rate measuring system, the flow rate measuring device, and the flow rate measuring method of the present invention will be described below.
The flow rate measuring device 1 of the third embodiment is configured in the same manner as the flow rate measuring device 1 of the first embodiment described above, except for points described later. Therefore, according to the flow rate measuring device 1 of the third embodiment, it is possible to achieve the same effects as the flow rate measuring device 1 of the first embodiment described above, except for the points described later.

FIG. 11 is a diagram showing a first example of the flow rate measuring device 1 of the third embodiment.
In the example shown in FIG. 1, the flow rate measuring device 1 includes the thermo-image capturing unit 12 and the temperature distribution calculating unit 13A. In the example shown in FIG. A temperature distribution detection unit 16A is provided instead of the calculation unit 13A. The temperature distribution detection unit 16A includes a plurality of thermocouples 16A1 to 16A4 arranged in the axial direction of the pipe A. As shown in FIG.
As described above, in the example shown in FIG. 1, while the laser light irradiation unit 11 is irradiating the outer surface A11 of the wall A1 of the pipe A with the laser light, the thermo-image capturing unit 12 detects the wall of the pipe A. A thermo image of the outer surface A11 of the portion A1 is captured, and the temperature distribution calculation unit 13A calculates the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A based on the thermo image captured by the thermo image capturing unit 12. do.
On the other hand, in the example shown in FIG. 11, while the laser beam irradiation unit 11 is irradiating the outer surface A11 of the wall portion A1 of the pipe A with the laser beam, the temperature distribution detection unit 16A detects that the wall portion A1 of the pipe A A temperature distribution of the outer surface A11 is detected.
In another example, the temperature distribution detector 16A may detect the temperature distribution of the outer surface A11 of the wall A1 of the pipe A after the laser beam irradiation by the laser beam irradiation unit 11 is completed.

In the example shown in FIG. 11, similarly to the example shown in FIG. Based on such information about the pipe A, the relationship between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A is output. The heat transfer numerical analysis/CFD analysis unit 14 outputs a plurality of relationships between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. FIG.
In the example shown in FIG. 11, the heat transfer numerical analysis/CFD analysis unit 14 calculates the flow velocity in the pipe A when the wind does not hit the outer surface A11 of the wall A1 of the pipe A and the outer surface of the wall A1 of the pipe A. Output the relationship with the temperature distribution of A11.
In another example, when wind hits the outer surface A11 of the wall A1 of the pipe A, the amount of heat lost by the outer surface A11 of the wall A1 of the pipe A due to the wind is calculated in advance by preliminary experiments, analysis, or the like. The heat transfer numerical analysis/CFD analysis unit 14 considers the amount of heat calculated in advance by preliminary experiments, analyses, etc., and calculates the relationship between the flow velocity in the pipe A and the temperature distribution on the outer surface A11 of the wall A1 of the pipe A. Output.

In the example shown in FIG. 11, the fluid velocity calculation unit 15 outputs the temperature distribution of the outer surface A11 of the wall A1 of the pipe A detected by the temperature distribution detection unit 16A and the heat transfer numerical analysis/CFD analysis unit 14. Calculate the velocity of the fluid flowing in the pipe A based on the relationship (more specifically, a plurality of relationships) between the velocity of the fluid flowing in the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. do.
The fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output by the heat transfer numerical analysis/CFD analysis unit 14, and the relationship and the temperature distribution detection unit The flow velocity in the pipe A is calculated based on the temperature distribution of the outer surface A11 of the wall A1 of the pipe A detected by 16A.

FIG. 12 is a flowchart for explaining an example of processing in the heat transfer numerical analysis/CFD analysis unit 14 and the fluid velocity calculation unit 15 of the flow measurement device 1 of the third embodiment.
In the example shown in FIG. 12, in step S31, for example, the user of the flow measurement device 1 sends the temperature distribution of the outer surface A11 of the wall A1 of the pipe A detected by the temperature distribution detection unit 16A to the fluid velocity calculation unit 15. input. In another example, the temperature distribution detector 16A may input the detected temperature distribution to the fluid velocity calculator 15 .

In the example shown in FIG. 12, in step S32, for example, the user of the flow measurement device 1 determines, for example, the outer diameter of the pipe A, the thickness of the wall A1 of the pipe A, the material of the pipe A, the laser beam irradiation unit 11 , and the characteristics of the fluid flowing through pipe A are input.
Next, in step S33, for example, the user of the flow rate measuring device 1 inputs the initial flow velocity in the pipe A (eg, 20 [m/s]).
Next, in step S34, the heat transfer numerical analysis/CFD analysis unit 14 outputs a plurality of relationships between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. The fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output by the heat transfer numerical analysis/CFD analysis unit 14, and calculates the temperature distribution indicated by the relationship. obtain.
Next, in step S35, the fluid velocity calculation unit 15 detects the temperature distribution input in step S31 (temperature distribution detected by the temperature distribution detection unit 16A) and the temperature distribution obtained in step S34 (heat transfer numerical analysis/ temperature distribution indicated by the relationship output by the CFD analysis unit 14). If the temperature distribution (input temperature distribution) input in step S31 is higher than the temperature distribution (output temperature distribution) obtained in step S34, the process proceeds to step S36. If the temperature distribution (input temperature distribution) input in step S31 is lower than the temperature distribution (output temperature distribution) obtained in step S34, the process proceeds to step S37. If the temperature distribution input in step S31 (input temperature distribution) matches the temperature distribution obtained in step S34 (output temperature distribution), the process proceeds to step S38.

In steps S36-S38, the same processes as steps S16-S18 shown in FIG. 3 are executed.

FIG. 13 is a flowchart for explaining an example of processing executed in the flow measurement device 1 of the third embodiment, including the processing shown in FIG. 12 .
In the example shown in FIG. 13, in step S301, the laser light irradiation unit 11 irradiates a laser light irradiation point A11B, which is one point on the outer surface A11 of the wall portion A1 of the pipe A, with laser light.
Next, in step S303, the temperature distribution detector 16A detects the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A irradiated with the laser beam in step S301.
Next, in step S304, based on the information about the pipe A, the heat transfer numerical analysis/CFD analysis unit 14 calculates the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. output the relationship between
Next, in step S305, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output in step S304, and the relationship detected in step S303. The velocity of the fluid flowing through the pipe A is calculated based on the temperature distribution obtained.

In the first example of the flow rate measuring device 1 of the third embodiment, the fluid in the pipe A is heated by the laser beam irradiated by the laser beam irradiation unit 11, so a heater is provided on the outer surface A11 of the wall A of the pipe A. The velocity of the fluid flowing in pipe A can be obtained without the need for installation.

In a second example of the flow rate measuring device 1 of the third embodiment, the flow rate measuring device 1 is configured similarly to the flow rate measuring device 1 shown in FIG. 11 .
Further, in the second example of the flow rate measuring device 1 of the third embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is made of the heat insulating material B configured similarly to the heat insulating material B shown in FIG. covered.

In a third example of the flow rate measuring device 1 of the third embodiment, the flow rate measuring device 1 is configured similarly to the flow rate measuring device 1 shown in FIG. 11 .
Further, in the third example of the flow rate measuring device 1 of the third embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is a windshield member C configured similarly to the windshield member C shown in FIG. covered by

[Fourth embodiment]
A fourth embodiment of the flow rate measuring system, the flow rate measuring device, and the flow rate measuring method of the present invention will be described below.
The flow rate measuring device 1 of the fourth embodiment is configured in the same manner as the flow rate measuring device 1 of the first embodiment described above, except for the points described later. Therefore, according to the flow rate measuring device 1 of the fourth embodiment, it is possible to achieve the same effects as the flow rate measuring device 1 of the first embodiment described above, except for the points described later.

FIG. 14 is a diagram showing a first example of the flow rate measuring device 1 of the fourth embodiment.
In the example shown in FIG. 1, the flow rate measuring device 1 includes the thermo-image capturing unit 12 and the temperature distribution calculating unit 13A. In the example shown in FIG. A temperature change detection unit 16B is provided instead of the calculation unit 13A. The temperature aging detector 16B includes, for example, one thermocouple 16B1 for detecting the temperature of the outer surface A11 of the wall A1 of the pipe A. The thermocouple 16B1 is arranged near the laser beam irradiation point A11B.
As described above, in the example shown in FIG. 1, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall A1 of the pipe A while the laser beam is being irradiated by the laser beam irradiation unit 11. do.
On the other hand, in the example shown in FIG. 14, after the laser light irradiation by the laser light irradiation unit 11 is completed, the temperature change detection unit 16B detects the wall portion A1 of the pipe A irradiated with the laser light by the laser light irradiation unit 11. to detect the temperature change over time of the outer surface A11 of the .

In the example shown in FIG. 14, the heat transfer numerical analysis/CFD analysis unit 14, for example, based on information about the pipe A such as the outer diameter of the pipe A, the thickness of the wall A1 of the pipe A, the material of the pipe A, etc. , the relationship between the velocity of the fluid flowing in the pipe A and the temperature change over time of the outer surface A11 of the wall A1 of the pipe A, and the like. The heat transfer numerical analysis/CFD analysis unit 14 outputs a plurality of relationships between the velocity of the fluid flowing through the pipe A and the change in temperature of the outer surface A11 of the wall A1 of the pipe A with time.
In the example shown in FIG. 14, the heat transfer numerical analysis/CFD analysis unit 14 calculates the flow velocity in the pipe A and the outer surface of the wall A1 of the pipe A when the wind does not hit the outer surface A11 of the wall A1 of the pipe A. Output the relationship with the temperature change over time of A11.
In another example, when wind hits the outer surface A11 of the wall A1 of the pipe A, the amount of heat lost by the outer surface A11 of the wall A1 of the pipe A due to the wind is calculated in advance by preliminary experiments, analysis, or the like. The heat transfer numerical analysis/CFD analysis unit 14 considers the amount of heat calculated in advance by preliminary experiments, analyses, etc., and considers the relationship between the flow velocity in the pipe A and the temperature change over time of the outer surface A11 of the wall A1 of the pipe A. to output

In the example shown in FIG. 14, the fluid velocity calculation unit 15 detects the temperature change over time of the outer surface A11 of the wall A1 of the pipe A detected by the temperature change detection unit 16B, and the heat transfer numerical analysis/CFD analysis unit 14 Based on the relationship (more specifically, a plurality of relationships) between the output speed of the fluid flowing in the pipe A and the temperature change of the outer surface A11 of the wall A1 of the pipe A, the Calculate speed.
The fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output by the heat transfer numerical analysis/CFD analysis unit 14, and detects the temperature change over time with that relationship. The flow velocity in the pipe A is calculated based on the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A detected by the portion 16B.

FIG. 15 is a flow chart for explaining an example of processing in the heat transfer numerical analysis/CFD analysis unit 14 and the fluid velocity calculation unit 15 of the flow measurement device 1 of the fourth embodiment.
In the example shown in FIG. 15, in step S41, for example, the user of the flow measuring device 1 detects the temperature change (time constant) of the outer surface A11 of the wall portion A1 of the pipe A detected by the temperature change detection unit 16B. Input to the fluid velocity calculator 15 . In another example, the temperature change detection unit 16</b>B may input the detected temperature change over time (time constant) to the fluid velocity calculation unit 15 .

In the example shown in FIG. 15, in step S42, for example, the user of the flow measurement device 1 determines, for example, the outer diameter of the pipe A, the thickness of the wall A1 of the pipe A, the material of the pipe A, the laser beam irradiation unit 11 , and the characteristics of the fluid flowing through pipe A are input.
Next, in step S43, for example, the user of the flow rate measuring device 1 inputs the initial flow velocity in the pipe A (eg, 20 [m/s]).
Next, in step S44, the heat transfer numerical analysis/CFD analysis unit 14 calculates a plurality of relationships between the velocity of the fluid flowing in the pipe A and the temperature change (time constant) of the outer surface A11 of the wall A1 of the pipe A over time. Output. The fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output by the heat transfer numerical analysis/CFD analysis unit 14, and calculates the temperature change over time indicated by the relationship. (time constant) is obtained.
Next, in step S45, the fluid velocity calculation unit 15 calculates the temperature change over time input in step S41 (the temperature change over time (time constant) detected by the temperature change detection unit 16B) and the temperature obtained in step S44. The change over time (temperature change over time (time constant) indicated by the relationship output by the heat transfer numerical analysis/CFD analysis unit 14) is compared. If the temperature change over time (input time constant) input in step S41 is greater than the temperature change over time (output time constant) obtained in step S44, the process proceeds to step S46. If the temperature change over time (input time constant) input in step S41 is smaller than the temperature change over time (output time constant) obtained in step S44, the process proceeds to step S47. If the temperature change over time (input time constant) input in step S41 matches the temperature change over time (output time constant) obtained in step S44, the process proceeds to step S48.

In steps S46-S48, the same processes as steps S16-S18 shown in FIG. 3 are executed.

FIG. 16 is a flow chart for explaining an example of processing executed in the flow rate measuring device 1 of the fourth embodiment, including the processing shown in FIG.
In the example shown in FIG. 16, in step S401, the laser light irradiation unit 11 irradiates a laser light irradiation point A11B, which is one point on the outer surface A11 of the wall portion A1 of the pipe A, with laser light.
Next, in step S403, the temperature change detection unit 16B detects the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A irradiated with the laser light in step S401.
Next, in step S404, based on the information about the pipe A, the heat transfer numerical analysis/CFD analysis unit 14 compares the velocity of the fluid flowing in the pipe A and the temperature change over time of the outer surface A11 of the wall A1 of the pipe A. Output multiple relations.
Next, in step S405, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships output in step S404, and the relationship detected in step S403. The velocity of the fluid flowing through the pipe A is calculated based on the temperature change over time.

In the first example of the flow rate measuring device 1 of the fourth embodiment, the fluid in the pipe A is heated by the laser beam irradiated by the laser beam irradiation unit 11, so a heater is provided on the outer surface A11 of the wall A of the pipe A. The velocity of the fluid flowing in pipe A can be obtained without the need for installation.

In a second example of the flow rate measuring device 1 of the fourth embodiment, the flow rate measuring device 1 is configured similarly to the flow rate measuring device 1 shown in FIG. 14 .
Further, in the second example of the flow rate measuring device 1 of the fourth embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is made of the heat insulating material B configured similarly to the heat insulating material B shown in FIG. covered.

In a third example of the flow rate measuring device 1 of the fourth embodiment, the flow rate measuring device 1 is configured similarly to the flow rate measuring device 1 shown in FIG. 11 .
Further, in the third example of the flow rate measuring device 1 of the fourth embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is a windshield member C configured similarly to the windshield member C shown in FIG. covered by

[Fifth embodiment]
A fifth embodiment of the flow rate measuring system, the flow rate measuring device, and the flow rate measuring method of the present invention will be described below.
The flow rate measuring device 1 included in the flow rate measuring system S of the fifth embodiment is configured in the same manner as the flow rate measuring device 1 of the first embodiment described above, except for the points described later. Therefore, according to the flow measurement system S of the fifth embodiment, it is possible to achieve the same effects as the flow measurement device 1 of the first embodiment described above, except for the points described later.

FIG. 17 is a diagram showing a first example of the flow measurement system S of the fifth embodiment.
In the example shown in FIG. 17 , the flow rate measurement system S includes a flow rate measurement device 1 and a heat transfer numerical analysis/CFD analysis section 2 . The flow measuring device 1 measures the velocity of the fluid flowing through the pipe A. As shown in FIG. The heat transfer numerical analysis/CFD analysis unit 2 is configured in the same manner as the heat transfer numerical analysis/CFD analysis unit 14 shown in FIG. Based on the information about the pipe A such as the material of A, the relationship between the velocity of the fluid flowing in the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A is output. The heat transfer numerical analysis/CFD analysis unit 2 outputs a plurality of relationships between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. FIG.
In the example shown in FIG. 17, the heat transfer numerical analysis/CFD analysis unit 2 calculates the flow velocity in the pipe A and the outer surface of the wall A1 of the pipe A when the wind does not hit the outer surface A11 of the wall A1 of the pipe A. Output the relationship with the temperature distribution of A11.
In another example, when wind hits the outer surface A11 of the wall A1 of the pipe A, the amount of heat lost by the outer surface A11 of the wall A1 of the pipe A due to the wind is calculated in advance by preliminary experiments, analysis, or the like. The heat transfer numerical analysis/CFD analysis unit 2 considers the amount of heat calculated in advance by preliminary experiments, analyses, etc., and calculates the relationship between the flow velocity in the pipe A and the temperature distribution on the outer surface A11 of the wall A1 of the pipe A. Output.

In the example shown in FIG. 17, the flow measurement device 1 includes, for example, a laser beam irradiation unit 11, a thermo-image capturing unit 12, a temperature distribution calculation unit 13A, a fluid velocity calculation unit 15, and a database unit 17. .
The laser beam irradiation unit 11 irradiates a laser beam to a laser beam irradiation point A11B, which is one point on the outer surface A11 of the wall portion A1 of the pipe A, to heat the fluid in the pipe A. As shown in FIG.
The thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall portion A1 of the pipe A irradiated with laser light by the laser light irradiation unit 11 .
The temperature distribution calculation unit 13A calculates the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A based on the thermo image captured by the thermo image capturing unit 12. FIG.
The database unit 17 stores the relationship (a plurality of relationships) between the velocity of the fluid flowing in the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A, which is output in advance by the heat transfer numerical analysis/CFD analysis unit 2. Remember.
Based on the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A calculated by the temperature distribution calculator 13A and a plurality of relationships stored in the database unit 17, the fluid velocity calculation unit 15 calculates the temperature inside the pipe A. Calculate the velocity of the fluid flowing through Specifically, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships stored in the database unit 17, and calculates the relationship between the relationship and the temperature distribution calculation unit 13A. The flow velocity in the pipe A is calculated based on the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A calculated by .

FIG. 18 is a flowchart for explaining an example of processing executed in the flow measurement system S of the fifth embodiment.
In the example shown in FIG. 18, in step S501, the heat transfer numerical analysis/CFD analysis unit 2 determines the velocity of the fluid flowing in the pipe A and the outer surface A11 of the wall A1 of the pipe A based on the information about the pipe A. Output multiple relationships with temperature distribution.
Next, in step S502, the database unit 17 stores the plurality of relationships output in step S501.
Next, in step S503, the laser beam irradiation unit 11 irradiates a laser beam irradiation point A11B, which is one point on the outer surface A11 of the wall portion A1 of the pipe A, with a laser beam.
Next, in step S504, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall portion A1 of the pipe A.
Next, in step S505, the temperature distribution calculator 13A calculates the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A based on the thermographic image captured in step S504.
Next, in step S506, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships stored in step S502, and the relationship calculated in step S505. The velocity of the fluid flowing through the pipe A is calculated based on the temperature distribution obtained.

In the first example of the flow measurement system S of the fifth embodiment, the fluid in the pipe A is heated by the laser beam irradiated by the laser beam irradiation unit 11, so a heater is provided on the outer surface A11 of the wall A of the pipe A. The velocity of the fluid flowing in pipe A can be obtained without the need for installation.

In the second example of the flow measurement system S of the fifth embodiment, the flow measurement device 1 is configured similarly to the flow measurement device 1 shown in FIG. 17 . Further, in the second example of the flow measurement system S of the fifth embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is made of the heat insulating material B configured similarly to the heat insulating material B shown in FIG. covered.

In the third example of the flow measurement system S of the fifth embodiment, the flow measurement device 1 is configured similarly to the flow measurement device 1 shown in FIG. 17 . Further, in the third example of the flow measurement system S of the fifth embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is a windshield member C configured similarly to the windshield member C shown in FIG. covered by

[Sixth embodiment]
A sixth embodiment of the flow rate measuring system, the flow rate measuring device, and the flow rate measuring method of the present invention will be described below.
The flow measurement system S of the sixth embodiment is configured in the same manner as the flow measurement system S of the fifth embodiment described above, except for points to be described later. Therefore, according to the flow measurement system S of the sixth embodiment, the same effects as those of the flow measurement system S of the fifth embodiment described above can be obtained except for the points described later.

FIG. 19 is a diagram showing a first example of the flow measurement system S of the sixth embodiment.
In the example shown in FIG. 19, the flow rate measurement system S includes a flow rate measurement device 1 and a heat transfer numerical analysis/CFD analysis section 2, similarly to the example shown in FIG.
In the example shown in FIG. 17, the flow measurement device 1 includes the temperature distribution calculation unit 13A, but in the example shown in FIG. 13B.
As described above, in the example shown in FIG. 17, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall A1 of the pipe A while the laser beam is being irradiated by the laser beam irradiation unit 11. do.
On the other hand, in the example shown in FIG. 19, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall portion A1 of the pipe A after the laser beam irradiation by the laser beam irradiation unit 11 is completed. Specifically, the thermo-image capturing unit 12 captures thermo-images of the outer surface A11 at a plurality of times in order to obtain temporal changes in the thermo-image of the outer surface A11.
In the example shown in FIG. 19 , the temperature change calculation unit 13B calculates the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A based on the change over time of the thermo-image captured by the thermo-image capturing unit 12. .

In the example shown in FIG. 19, the heat transfer numerical analysis/CFD analysis unit 2, for example, based on information about the pipe A such as the outer diameter of the pipe A, the thickness of the wall A1 of the pipe A, the material of the pipe A, etc. , the relationship between the velocity of the fluid flowing in the pipe A and the temperature change over time of the outer surface A11 of the wall A1 of the pipe A, and the like. The heat transfer numerical analysis/CFD analysis unit 2 outputs a plurality of relationships between the velocity of the fluid flowing through the pipe A and the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A. FIG.
The database unit 17 stores the relationship (a plurality of relationships) between the velocity of the fluid flowing through the pipe A and the temperature change over time of the outer surface A11 of the wall A1 of the pipe A, which is output in advance by the heat transfer numerical analysis/CFD analysis unit 2. memorize
The fluid velocity calculation unit 15 calculates the temperature of the pipe A based on the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A calculated by the temperature change calculation unit 13B and a plurality of relationships stored in the database unit 17. Calculate the velocity of the fluid flowing through A. Specifically, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships stored in the database unit 17, and the relationship and the temperature change calculation unit The flow velocity in the pipe A is calculated based on the temperature change over time of the outer surface A11 of the wall A1 of the pipe A calculated by 13B.

FIG. 20 is a flowchart for explaining an example of processing executed in the flow measurement system S of the sixth embodiment.
In the example shown in FIG. 20, in step S601, the heat transfer numerical analysis/CFD analysis unit 2 determines the velocity of the fluid flowing in the pipe A and the outer surface A11 of the wall A1 of the pipe A based on the information about the pipe A. Output multiple relationships with temperature over time.
Next, in step S602, the database unit 17 stores the plurality of relationships output in step S601.
Next, in step S603, the laser beam irradiation unit 11 irradiates the laser beam irradiation point A11B, which is one point on the outer surface A11 of the wall portion A1 of the pipe A, with a laser beam.
Next, in step S604, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall portion A1 of the pipe A.
Next, in step S605, the temperature temporal change calculator 13B calculates the temperature temporal change of the outer surface A11 of the wall portion A1 of the pipe A based on the temporal change of the thermo-image captured in step S604.
Next, in step S606, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships stored in step S602, and the relationship calculated in step S605. The velocity of the fluid flowing through the pipe A is calculated based on the temperature change over time.

In the first example of the flow measurement system S of the sixth embodiment, since the fluid in the pipe A is heated by the laser light emitted by the laser light irradiation unit 11, a heater is provided on the outer surface A11 of the wall A of the pipe A. The velocity of the fluid flowing in pipe A can be obtained without the need for installation.

In the second example of the flow measurement system S of the sixth embodiment, the flow measurement device 1 is configured similarly to the flow measurement device 1 shown in FIG. 19 . Further, in the second example of the flow measurement system S of the sixth embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is made of the heat insulating material B configured similarly to the heat insulating material B shown in FIG. covered.

In the third example of the flow measurement system S of the sixth embodiment, the flow measurement device 1 is configured similarly to the flow measurement device 1 shown in FIG. 19 . Further, in the third example of the flow measurement system S of the sixth embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is a windshield member C configured similarly to the windshield member C shown in FIG. covered by

[Seventh embodiment]
A seventh embodiment of the flow rate measurement system, the flow rate measurement device, and the flow rate measurement method of the present invention will be described below.
The flow measurement system S of the seventh embodiment is configured in the same manner as the flow measurement system S of the fifth embodiment described above, except for the points described later. Therefore, according to the flow measurement system S of the seventh embodiment, the same effects as those of the flow measurement system S of the fifth embodiment described above can be obtained except for the points described later.

FIG. 21 is a diagram showing a first example of the flow rate measurement system S of the seventh embodiment.
In the example shown in FIG. 21, the flow rate measurement system S includes a flow rate measurement device 1 and a heat transfer numerical analysis/CFD analysis section 2, similarly to the example shown in FIG.
In the example shown in FIG. 17, the flow rate measuring device 1 includes the thermo-image capturing unit 12 and the temperature distribution calculating unit 13A. In the example shown in FIG. A temperature distribution detection unit 16A is provided instead of the calculation unit 13A. The temperature distribution detection unit 16A includes a plurality of thermocouples 16A1 to 16A4 arranged in the axial direction of the pipe A. As shown in FIG.
As described above, in the example shown in FIG. 17, while the laser light irradiation unit 11 is irradiating the outer surface A11 of the wall A1 of the pipe A with the laser light, the thermo-image capturing unit 12 detects the wall of the pipe A. A thermo image of the outer surface A11 of the portion A1 is captured, and the temperature distribution calculation unit 13A calculates the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A based on the thermo image captured by the thermo image capturing unit 12. do.
On the other hand, in the example shown in FIG. 21, while the laser beam irradiation unit 11 is irradiating the outer surface A11 of the wall portion A1 of the pipe A with the laser beam, the temperature distribution detection unit 16A detects that the wall portion A1 of the pipe A A temperature distribution of the outer surface A11 is detected.

In the example shown in FIG. 21, the heat transfer numerical analysis/CFD analysis unit 2, for example, based on information about the pipe A such as the outer diameter of the pipe A, the thickness of the wall A1 of the pipe A, the material of the pipe A, etc. , the relationship between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A, and the like. The heat transfer numerical analysis/CFD analysis unit 2 outputs a plurality of relationships between the velocity of the fluid flowing through the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A. FIG.
The database unit 17 stores the relationship (a plurality of relationships) between the velocity of the fluid flowing in the pipe A and the temperature distribution of the outer surface A11 of the wall A1 of the pipe A, which is output in advance by the heat transfer numerical analysis/CFD analysis unit 2. Remember.
The fluid velocity calculation unit 15 calculates the temperature inside the pipe A based on the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A detected by the temperature distribution detection unit 16A and a plurality of relationships stored in the database unit 17. Calculate the velocity of the fluid flowing through Specifically, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships stored in the database unit 17, and calculates the relationship between the relationship and the temperature distribution calculation unit 13A. The flow velocity in the pipe A is calculated based on the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A calculated by .

FIG. 22 is a flowchart for explaining an example of processing executed in the flow measurement system S of the seventh embodiment.
In the example shown in FIG. 22, in step S701, the heat transfer numerical analysis/CFD analysis unit 2 determines the velocity of the fluid flowing through the pipe A and the outer surface A11 of the wall A1 of the pipe A based on the information about the pipe A. Output multiple relationships with temperature distribution.
Next, in step S702, the database unit 17 stores the plurality of relationships output in step S701.
Next, in step S703, the laser beam irradiation unit 11 irradiates the laser beam irradiation point A11B, which is one point on the outer surface A11 of the wall portion A1 of the pipe A, with a laser beam.
Next, in step S704, the temperature distribution detection unit 16A detects the temperature distribution of the outer surface A11 of the wall portion A1 of the pipe A irradiated with the laser beam in step S703.
Next, in step S706, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships stored in step S702, and selects the relationship detected in step S704. The velocity of the fluid flowing through the pipe A is calculated based on the temperature distribution obtained.

In the first example of the flow measurement system S of the seventh embodiment, the fluid in the pipe A is heated by the laser beam irradiated by the laser beam irradiation unit 11, so a heater is provided on the outer surface A11 of the wall A of the pipe A. The velocity of the fluid flowing in pipe A can be obtained without the need for installation.

In the second example of the flow measurement system S of the seventh embodiment, the flow measurement device 1 is configured similarly to the flow measurement device 1 shown in FIG. 21 . Further, in the second example of the flow measurement system S of the seventh embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is made of the heat insulating material B configured similarly to the heat insulating material B shown in FIG. covered.

In the third example of the flow measurement system S of the seventh embodiment, the flow measurement device 1 is configured similarly to the flow measurement device 1 shown in FIG. Further, in the third example of the flow measurement system S of the seventh embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is a windshield member C configured similarly to the windshield member C shown in FIG. covered by

[Eighth embodiment]
An eighth embodiment of the flow rate measuring system, the flow rate measuring device, and the flow rate measuring method of the present invention will be described below.
The flow rate measurement system S of the eighth embodiment is configured in the same manner as the flow rate measurement system S of the fifth embodiment described above, except for the points described later. Therefore, according to the flow measurement system S of the eighth embodiment, the same effects as the flow measurement system S of the fifth embodiment described above can be obtained except for the points described later.

FIG. 23 is a diagram showing a first example of the flow measurement system S of the eighth embodiment.
In the example shown in FIG. 23, the flow rate measurement system S includes a flow rate measurement device 1 and a heat transfer numerical analysis/CFD analysis section 2, similarly to the example shown in FIG.
In the example shown in FIG. 17, the flow rate measuring device 1 includes the thermo-image capturing unit 12 and the temperature distribution calculating unit 13A. In the example shown in FIG. A temperature change detection unit 16B is provided instead of the calculation unit 13A. The temperature aging detector 16B includes, for example, one thermocouple 16B1 for detecting the temperature of the outer surface A11 of the wall A1 of the pipe A. The thermocouple 16B1 is arranged near the laser beam irradiation point A11B.
As described above, in the example shown in FIG. 17, the thermo-image capturing unit 12 captures a thermo-image of the outer surface A11 of the wall A1 of the pipe A while the laser beam is being irradiated by the laser beam irradiation unit 11. do.
On the other hand, in the example shown in FIG. 23, after the irradiation of the laser light by the laser light irradiation unit 11 is completed, the temperature change detection unit 16B detects the wall portion A1 of the pipe A irradiated with the laser light by the laser light irradiation unit 11. to detect the temperature change over time of the outer surface A11 of the .

In the example shown in FIG. 23, the heat transfer numerical analysis/CFD analysis unit 2, for example, based on information about the pipe A such as the outer diameter of the pipe A, the thickness of the wall A1 of the pipe A, the material of the pipe A, etc. , the relationship between the velocity of the fluid flowing in the pipe A and the temperature change over time of the outer surface A11 of the wall A1 of the pipe A, and the like. The heat transfer numerical analysis/CFD analysis unit 2 outputs a plurality of relationships between the velocity of the fluid flowing through the pipe A and the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A. FIG.
The database unit 17 stores the relationship (a plurality of relationships) between the velocity of the fluid flowing through the pipe A and the temperature change over time of the outer surface A11 of the wall A1 of the pipe A, which is output in advance by the heat transfer numerical analysis/CFD analysis unit 2. memorize
The fluid velocity calculation unit 15 calculates the temperature of the pipe based on the temporal temperature change of the outer surface A11 of the wall A1 of the pipe A detected by the temperature temporal change detection unit 16B and a plurality of relationships stored in the database unit 17. Calculate the velocity of the fluid flowing through A. Specifically, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships stored in the database unit 17, and the relationship and the temperature change detection unit The flow velocity in the pipe A is calculated based on the temperature change over time of the outer surface A11 of the wall A1 of the pipe A detected by 16B.

FIG. 24 is a flowchart for explaining an example of processing executed in the flow measurement system S of the eighth embodiment.
In the example shown in FIG. 24, in step S801, the heat transfer numerical analysis/CFD analysis unit 2 determines the velocity of the fluid flowing in the pipe A and the outer surface A11 of the wall A1 of the pipe A based on the information about the pipe A. Output multiple relationships with temperature over time.
Next, in step S802, the database unit 17 stores the plurality of relationships output in step S801.
Next, in step S803, the laser beam irradiation unit 11 irradiates a laser beam irradiation point A11B, which is one point on the outer surface A11 of the wall portion A1 of the pipe A, with a laser beam.
Next, in step S804, the temperature change detection unit 16B detects the temperature change over time of the outer surface A11 of the wall portion A1 of the pipe A irradiated with the laser light in step S803.
Next, in step S806, the fluid velocity calculation unit 15 selects one relationship suitable for calculating the flow velocity in the pipe A from among the plurality of relationships stored in step S802, and the relationship detected in step S804. The velocity of the fluid flowing through the pipe A is calculated based on the temperature change over time.

In the first example of the flow measurement system S of the eighth embodiment, since the fluid in the pipe A is heated by the laser beam irradiated by the laser beam irradiation unit 11, a heater is provided on the outer surface A11 of the wall portion A of the pipe A. The velocity of the fluid flowing in pipe A can be obtained without the need for installation.

In the second example of the flow rate measurement system S of the eighth embodiment, the flow rate measurement device 1 is configured similarly to the flow rate measurement device 1 shown in FIG. 23 . Further, in the second example of the flow rate measurement system S of the eighth embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is made of the heat insulating material B configured similarly to the heat insulating material B shown in FIG. covered.

In the third example of the flow measurement system S of the eighth embodiment, the flow measurement device 1 is configured similarly to the flow measurement device 1 shown in FIG. 23 . Further, in the third example of the flow rate measuring system S of the eighth embodiment, most of the outer surface A11 of the wall portion A1 of the pipe A is a windshield member C configured similarly to the windshield member C shown in FIG. covered by

Although the embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to these embodiments and examples, and can be changed as appropriate without departing from the scope of the present invention. can be added. You may combine the structure as described in each embodiment and each example which were mentioned above.

S... Flow rate measuring system 1... Flow rate measuring device 11... Laser beam irradiation unit 12... Thermo imaging unit 13A... Temperature distribution calculation unit 13B... Temporal change calculation unit 14... Heat transfer numerical analysis/CFD analysis Part, 15... Fluid velocity calculation part, 16A... Temperature distribution detection part, 16A1 to 16A4... Thermocouple, 16B... Temperature change detection part, 16B1... Thermocouple, 17... Database part, 2... Heat transfer numerical analysis/CFD analysis Part, A... Piping, A1... Wall part, A11... Outer surface, A11A... Imaging area, A11B... Laser light irradiation point, B... Heat insulating material, B1... Transmissive part, C... Wind shield member, C1... Transmissive part

Claims (22)

a laser beam irradiation unit that irradiates a laser beam to a laser beam irradiation point that is one point on the outer surface of the wall of the pipe through which the fluid flows;
a temperature distribution calculation unit that calculates the temperature distribution of the outer surface irradiated with the laser light by the laser light irradiation unit;
A heat transfer numerical analysis/CFD analysis unit that outputs at least the relationship between the velocity of the fluid flowing in the pipe and the temperature distribution of the outer surface based on the information of the pipe;
Fluid velocity for calculating the velocity of the fluid flowing in the pipe based on the temperature distribution of the outer surface calculated by the temperature distribution calculation unit and the relationship output by the heat transfer numerical analysis/CFD analysis unit a calculation unit;
Flow measurement device. further comprising a thermo-image capturing unit for capturing a thermo-image of the outer surface irradiated with the laser light by the laser light irradiation unit;
The temperature distribution calculation unit calculates the temperature distribution of the outer surface based on the thermo image captured by the thermo image capturing unit.
The flow rate measuring device according to claim 1. a laser beam irradiation unit that irradiates a laser beam to a laser beam irradiation point that is one point on the outer surface of the wall of the pipe through which the fluid flows;
a temperature change calculation unit that calculates a temperature change over time of the outer surface irradiated with the laser light by the laser light irradiation unit;
a heat transfer numerical analysis/CFD analysis unit that outputs at least the relationship between the velocity of the fluid flowing in the pipe and the temperature change over time of the outer surface based on the information of the pipe;
Calculate the velocity of the fluid flowing through the pipe based on the temperature change over time of the outer surface calculated by the temperature change calculation unit over time and the relationship output by the heat transfer numerical analysis/CFD analysis unit. A fluid velocity calculation unit,
Flow measurement device. further comprising a thermo-image capturing unit for capturing a thermo-image of the outer surface irradiated with the laser light by the laser light irradiation unit;
The temperature change calculation unit calculates the temperature change over time of the outer surface based on the change over time of the thermo image captured by the thermo image capturing unit.
The flow measuring device according to claim 3. The outer surface of the wall of the pipe is covered with a heat insulating material,
The heat insulating material has a transmission part that transmits the laser light irradiated by the laser light irradiation part,
The flow measuring device according to any one of claims 1 to 4. The outer surface of the wall of the pipe is covered with a windshield member,
The windshield member includes a transmission section that transmits the laser light irradiated by the laser light irradiation section,
The flow measuring device according to any one of claims 1 to 4. a laser beam irradiation unit that irradiates a laser beam to a laser beam irradiation point that is one point on the outer surface of the wall of the pipe through which the fluid flows;
a temperature distribution detection unit that detects the temperature distribution of the outer surface irradiated with the laser light by the laser light irradiation unit;
A heat transfer numerical analysis/CFD analysis unit that outputs at least the relationship between the velocity of the fluid flowing in the pipe and the temperature distribution of the outer surface based on the information of the pipe;
Fluid velocity for calculating the velocity of the fluid flowing in the pipe based on the temperature distribution of the outer surface detected by the temperature distribution detection unit and the relationship output by the heat transfer numerical analysis/CFD analysis unit a calculation unit;
Flow measurement device. The temperature distribution detection unit includes a plurality of thermocouples arranged in the pipe axis direction of the pipe,
The flow measuring device according to claim 7. a laser beam irradiation unit that irradiates a laser beam to a laser beam irradiation point that is one point on the outer surface of the wall of the pipe through which the fluid flows;
a temperature change detection unit that detects a temperature change over time of the outer surface irradiated with the laser light by the laser light irradiation unit;
a heat transfer numerical analysis/CFD analysis unit that outputs at least the relationship between the velocity of the fluid flowing in the pipe and the temperature change over time of the outer surface based on the information of the pipe;
Calculate the velocity of the fluid flowing through the pipe based on the temperature change over time of the outer surface detected by the temperature change detection unit and the relationship output by the heat transfer numerical analysis/CFD analysis unit. A fluid velocity calculation unit,
Flow measurement device. The temperature aging detection unit includes a thermocouple placed near the laser beam irradiation point,
The flow measuring device according to claim 9. a flow rate measuring device that measures the speed of fluid flowing through the pipe;
A flow measurement system comprising a heat transfer numerical analysis/CFD analysis unit that outputs at least the relationship between the velocity of the fluid flowing through the pipe and the temperature distribution of the outer surface of the wall of the pipe based on the information of the pipe. There is
The flow rate measuring device is
A laser light irradiation unit that irradiates a laser light to a laser light irradiation point that is one point on the outer surface;
a temperature distribution calculation unit that calculates the temperature distribution of the outer surface irradiated with the laser light by the laser light irradiation unit;
a database unit that stores the relationship previously output by the heat transfer numerical analysis/CFD analysis unit;
a fluid velocity calculation unit that calculates the velocity of the fluid flowing through the pipe based on the temperature distribution of the outer surface calculated by the temperature distribution calculation unit and the relationship stored in the database unit; ,
Flow measurement system. The flow rate measuring device further comprises a thermo-image capturing unit that captures a thermo-image of the outer surface irradiated with the laser light by the laser light irradiation unit,
The temperature distribution calculation unit calculates the temperature distribution of the outer surface based on the thermo image captured by the thermo image capturing unit.
The flow measurement system according to claim 11. a flow rate measuring device that measures the speed of fluid flowing through the pipe;
A flow measurement system comprising a heat transfer numerical analysis/CFD analysis unit that outputs at least the relationship between the velocity of the fluid flowing in the pipe and the temperature change over time of the outer surface of the wall of the pipe based on the information of the pipe. and
The flow rate measuring device is
A laser light irradiation unit that irradiates a laser light to a laser light irradiation point that is one point on the outer surface;
a temperature change calculation unit that calculates a temperature change over time of the outer surface irradiated with the laser light by the laser light irradiation unit;
a database unit that stores the relationship previously output by the heat transfer numerical analysis/CFD analysis unit;
a fluid speed calculation unit that calculates the speed of the fluid flowing through the pipe based on the temperature change over time of the outer surface calculated by the temperature change calculation unit over time and the relationship stored in the database unit; comprising
Flow measurement system. The flow rate measuring device further comprises a thermo-image capturing unit that captures a thermo-image of the outer surface irradiated with the laser light by the laser light irradiation unit,
The temperature change calculation unit calculates the temperature change over time of the outer surface based on the change over time of the thermo image captured by the thermo image capturing unit.
The flow measurement system according to claim 13. a flow rate measuring device that measures the speed of fluid flowing through the pipe;
A flow measurement system comprising a heat transfer numerical analysis/CFD analysis unit that outputs at least the relationship between the velocity of the fluid flowing through the pipe and the temperature distribution of the outer surface of the wall of the pipe based on the information of the pipe. There is
The flow rate measuring device is
A laser light irradiation unit that irradiates a laser light to a laser light irradiation point that is one point on the outer surface;
a temperature distribution detection unit that detects the temperature distribution of the outer surface irradiated with the laser light by the laser light irradiation unit;
a database unit that stores the relationship previously output by the heat transfer numerical analysis/CFD analysis unit;
a fluid velocity calculator that calculates the velocity of the fluid flowing through the pipe based on the temperature distribution of the outer surface detected by the temperature distribution detector and the relationship stored in the database. ,
Flow measurement system. The temperature distribution detection unit includes a plurality of thermocouples arranged in the pipe axis direction of the pipe,
The flow measurement system according to claim 15. a flow rate measuring device that measures the speed of fluid flowing through the pipe;
A flow measurement system comprising a heat transfer numerical analysis/CFD analysis unit that outputs at least the relationship between the velocity of the fluid flowing in the pipe and the temperature change over time of the outer surface of the wall of the pipe based on the information of the pipe. and
The flow rate measuring device is
A laser light irradiation unit that irradiates a laser light to a laser light irradiation point that is one point on the outer surface;
a temperature change detection unit that detects a temperature change over time of the outer surface irradiated with the laser light by the laser light irradiation unit;
a database unit that stores the relationship previously output by the heat transfer numerical analysis/CFD analysis unit;
a fluid speed calculation unit that calculates the speed of the fluid flowing through the pipe based on the temperature change over time of the outer surface detected by the temperature change detection unit over time and the relationship stored in the database unit; comprising
Flow measurement system. The temperature aging detection unit includes a thermocouple placed near the laser beam irradiation point,
The flow measurement system according to claim 17. A laser light irradiation step of irradiating a laser light irradiation point, which is one point on the outer surface of the wall of the pipe through which the fluid flows, with a laser light;
a temperature distribution calculating step of calculating the temperature distribution of the outer surface irradiated with the laser light in the laser light irradiation step;
A heat transfer numerical analysis/CFD analysis step of outputting at least the relationship between the velocity of the fluid flowing in the pipe and the temperature distribution of the outer surface based on the information of the pipe;
Fluid velocity for calculating the velocity of the fluid flowing in the pipe based on the temperature distribution of the outer surface calculated in the temperature distribution calculating step and the relationship output in the heat transfer numerical analysis/CFD analysis step a calculating step;
Flow measurement method. A laser light irradiation step of irradiating a laser light irradiation point, which is one point on the outer surface of the wall of the pipe through which the fluid flows, with a laser light;
a temperature change calculation step of calculating a temperature change over time of the outer surface irradiated with the laser light in the laser light irradiation step;
A heat transfer numerical analysis/CFD analysis step of outputting at least the relationship between the velocity of the fluid flowing in the pipe and the temperature change over time of the outer surface based on the information of the pipe;
Calculate the velocity of the fluid flowing through the pipe based on the temperature change over time of the outer surface calculated in the temperature change calculation step and the relationship output in the heat transfer numerical analysis/CFD analysis step. A fluid velocity calculation step;
Flow measurement method. A laser light irradiation step of irradiating a laser light irradiation point, which is one point on the outer surface of the wall of the pipe through which the fluid flows, with a laser light;
a temperature distribution detection step of detecting the temperature distribution of the outer surface irradiated with the laser light in the laser light irradiation step;
A heat transfer numerical analysis/CFD analysis step of outputting at least the relationship between the velocity of the fluid flowing in the pipe and the temperature distribution of the outer surface based on the information of the pipe;
Fluid velocity for calculating the velocity of the fluid flowing through the pipe based on the temperature distribution of the outer surface detected in the temperature distribution detecting step and the relationship output in the heat transfer numerical analysis/CFD analysis step a calculating step;
Flow measurement method. A laser light irradiation step of irradiating a laser light irradiation point, which is one point on the outer surface of the wall of the pipe through which the fluid flows, with a laser light;
a temperature change detection step of detecting a temperature change over time of the outer surface irradiated with the laser light in the laser light irradiation step;
A heat transfer numerical analysis/CFD analysis step of outputting at least the relationship between the velocity of the fluid flowing in the pipe and the temperature change over time of the outer surface based on the information of the pipe;
Calculate the velocity of the fluid flowing through the pipe based on the temperature change over time of the outer surface detected in the temperature change detection step and the relationship output in the heat transfer numerical analysis/CFD analysis step. A fluid velocity calculation step;
Flow measurement method.

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