JP2013024632A - Reference pressure measurement auxiliary tool and reference pressure measurement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reference pressure measurement auxiliary tool for stabilizing static pressure inside a hollow tube against fluctuation of atmospheric pressure.SOLUTION: A reference pressure measurement auxiliary tool 10A is formed of a long hollow tube 11 having flexibility which is long in one direction. The hollow tube 11 has: a detection end 12 with an air first gateway; a connection end 14 with an air second gateway; and an intermediate part 13 which is located between the detection end 12 and the connection end 14. In the reference pressure measurement auxiliary tool 10A, the hollow tube 11 is installed so that transmission of atmospheric pressure is not blocked at the detection end 12, the intermediate part 13, and the connection end 14, and static pressure inside the hollow tube 11 is gradually stabilized from the detection end 12 toward the connection end 14 by pressure resistance inside the hollow tube 11.

Description

  The present invention relates to a reference pressure measurement auxiliary tool used for measuring a reference pressure of air at a predetermined location and a reference pressure measurement method for measuring a reference pressure of air at a predetermined location.

  A venturi flow meter is installed in the middle of the duct installed for air intake, and a hood with a skirt is attached to the upper end of the duct so that the lower edge of the hood is below the upper edge of the duct. In addition, there is an air intake intake cylinder in which a partition plate is attached to a portion above the lower end edge of the hood of the duct, and an inclined plate that is inclined inwardly is attached to the upper end edge of the duct (see Patent Document 1). . This intake cylinder for air intake can solve the problem that the measured value of the venturi flow meter deviates from the true value even if the outside air pressure fluctuates greatly, and the measured value of the air intake flow rate from the intake cylinder Can be matched to the true flow rate.

Japanese Patent Laid-Open No. 10-160531

  The intake cylinder disclosed in the above publication can hold the measured value of the venturi flow meter at a true value against a large fluctuation in outside air, but can reduce fluctuations in the amplitude of air pressure in the intake cylinder. In addition, since the period of the air pressure of the intake cylinder cannot be increased, the static pressure inside the intake cylinder when the outside air fluctuates cannot be stabilized. If the static pressure cannot be stabilized, it will not be possible to prevent irregular and sudden changes in the reference air pressure at a given location, and malfunctions and over-operations will occur in the control operation of the control device using that reference pressure. May occur.

  An object of the present invention is to provide a reference pressure measurement auxiliary tool that can stabilize indoor static pressure against fluctuations in outdoor air pressure, and can prevent irregular and sudden changes in the reference pressure of air at a predetermined location. It is to provide a reference pressure measuring method.

  The first premise of the present invention for solving the above-described problem is a reference pressure measurement auxiliary tool used for measuring the reference pressure of air at a predetermined location.

  The reference pressure measurement auxiliary tool according to the first premise is characterized in that the reference pressure measurement auxiliary tool is formed from a long and flexible hollow tube that is long in one direction, and the hollow tube has a first air inlet / outlet port. A detection end portion provided, a connection end portion provided on the opposite side of the detection end portion with an air second inlet / outlet, and an intermediate portion positioned between the detection end portion and the connection end portion, and a reference In the pressure measurement aid, a hollow tube is installed so that atmospheric pressure transmission is not interrupted at the detection end, intermediate portion, and connection end, and the static pressure inside the hollow tube is detected by the pressure resistance inside the hollow tube. It is to be gradually stabilized from the end toward the connection end.

  As an example of the reference pressure measurement aid, the middle part of the hollow tube is wound in a coil shape.

  As another example of the reference pressure measurement aid, the detection end of the hollow tube branches from the intermediate portion into at least two.

  As another example of the reference pressure measurement aid, the hollow tube has at least two intermediate portions branched from the connection end portion and at least two detection end portions connected to the intermediate portions.

  As another example of the reference pressure measurement aid, at least one of the two detection end portions is installed outdoors in the first direction, and the other detection end portion is in the second direction opposite to the first direction. is set up.

  As another example of the reference pressure measurement aid, the detection end of the hollow tube has a closed tip and a peripheral side surface continuing from the closed tip, and the first air inlet / outlet is formed on the peripheral side.

As another example of the reference pressure measurement assisting tool, a plurality of air first entrances are formed on the peripheral side surface, and the opening area of the air first entrance is in the range of 10 to 20 mm ² .

  As another example of the reference pressure measurement auxiliary tool, the detection end of the hollow tube and the intermediate portion wound in a coil shape are accommodated in a breathable casing having an air flow window, and the connection of the hollow tube The end is exposed from the housing.

  Another example of the reference pressure measurement auxiliary tool includes a detection device in which the reference pressure measurement auxiliary tool is connected to the connection end of the hollow tube and detects the static pressure inside the hollow tube.

  As another example of the reference pressure measurement auxiliary tool, the length from the detection end to the connection end of the hollow tube is in the range of 50 to 500 m, and the detection end, the connection end and the intermediate portion of the hollow tube And the inner diameter is in the range of 4 to 20 mm.

  As another example of the reference pressure measurement assisting tool, the hollow tube is formed in the hollow tube with respect to the atmospheric pressure fluctuation in the vicinity of the detection end in a pressure difference of ± 10 to ± 150 Pa between the detection end and the connection end. Stabilize static pressure.

  The second premise of the present invention for solving the above problem is a reference pressure measuring method for measuring a reference pressure of air at a predetermined location.

The characteristic of the reference pressure measurement method in the second premise is:
The reference pressure measurement method uses a long and flexible hollow tube that is long in one direction, and the hollow tube is positioned on the opposite side of the detection end with the detection end provided with the first air inlet / outlet. A connection end portion having a second air inlet / outlet and an intermediate portion positioned between the detection end portion and the connection end portion. In the reference pressure measurement method, the detection end portion, the intermediate portion, and the connection end portion The hollow tube is installed so that the transmission of atmospheric pressure is not interrupted, and the static pressure inside the hollow tube is gradually stabilized from the detection end to the connection end by the pressure resistance inside the hollow tube.

  As an example of the reference pressure measuring method, the middle part of the hollow tube is wound in a coil shape.

  As another example of the reference pressure measuring method, the detection end portion of the hollow tube branches from the intermediate portion into at least two.

  As another example of the reference pressure measuring method, the hollow tube has at least two intermediate portions branched from the connection end portion and at least two detection end portions connected to the intermediate portions.

  As another example of the reference pressure measurement method, at least one of the two detection end portions is installed outdoors in the first direction, and the other detection end portion is installed in the second direction opposite to the first direction. Has been.

  As another example of the reference pressure measuring method, the detection end portion has a closed tip and a peripheral side surface continuing from the closed tip, and the first air inlet / outlet is formed on the peripheral side surface.

As another example of the reference pressure measurement method, a plurality of first air inlets / outlets are formed on the peripheral side surface, and the opening area of the first air inlet / outlet is in the range of 10 to 20 mm ² .

  As another example of the reference pressure measuring method, the detection end portion of the hollow tube and the intermediate portion wound in a coil shape are accommodated in a breathable casing having an air inflow window, and the connection end of the hollow tube Part is exposed from the housing.

  As another example of the reference pressure measurement method, a detection device that detects the static pressure inside the hollow tube is connected to the connection end of the hollow tube.

  As another example of the reference pressure measurement method, the length from the detection end of the hollow tube to the connection end is in the range of 50 to 500 m, and the detection end, the connection end, and the intermediate portion of the hollow tube The inner diameter is in the range of 4-20 mm.

  As another example of the reference pressure measuring method, the hollow tube is a static tube in the hollow tube against fluctuations in atmospheric pressure in the vicinity of the detection end within a pressure difference of ± 10 to ± 150 Pa between the detection end and the connection end. Stabilize the pressure.

  According to the reference pressure measurement auxiliary tool and the reference pressure measurement method according to the present invention, a long and flexible hollow tube that is long in one direction is used to measure the reference pressure of air at a predetermined location. Even if the air pressure in the vicinity of the detection end provided with the first air inlet / outlet changes due to the influence, the change in the amplitude of the static pressure in the hollow tube relative to the change in the atmospheric pressure due to the pressure resistance inside the hollow tube is detected at the detection end. From the detection end to the connection end, the period of static pressure in the hollow tube gradually increases from the detection end to the connection end. The static pressure inside the tube can be stabilized, and irregular and sudden changes in the measured reference pressure can be prevented. Since the reference pressure measurement auxiliary tool and the reference pressure measurement method can measure a stable reference pressure even if the air pressure fluctuates in the vicinity of the detection end provided with the first air inlet / outlet, the reference pressure is irregular and It is possible to prevent malfunction or overoperation of the control operation due to a sudden change.

  The reference pressure measurement auxiliary tool and the reference pressure measurement method in which the intermediate portion of the hollow tube is wound in a coil shape is to make a long hollow tube compact by winding the intermediate portion of the hollow tube in a coil shape. Therefore, the hollow tube can be installed at a predetermined location without taking up space. The reference pressure measurement auxiliary tool and the reference pressure measurement method have the pressure resistance inside the coiled hollow tube even if the air pressure near the detection end provided with the first air inlet / outlet fluctuates due to the influence of wind. As a result, the fluctuation of the static pressure amplitude in the hollow tube with respect to the fluctuation of the atmospheric pressure gradually decreases from the detection end toward the connection end, and the period of the static pressure in the hollow tube with respect to the fluctuation of the atmospheric pressure from the detection end. Since it becomes gradually longer toward the connection end, it is possible to stabilize the static pressure inside the hollow tube against fluctuations in outdoor pressure, and to prevent irregular and sudden changes in the measured reference pressure, A stable reference pressure can be measured.

  In the reference pressure measurement auxiliary tool and the reference pressure measurement method in which the detection end portion branches from the intermediate portion to at least two, even if one detection end portion is blocked due to some cause, the reference pressure is reduced by the other detection end portion. It is possible to measure, and it is possible to prevent the inability to measure the reference pressure due to the detection end being blocked. The reference pressure measurement auxiliary tool and the reference pressure measurement method can stabilize the static pressure inside the hollow tube even if the atmospheric pressure near the detection end provided with the first air inlet / outlet fluctuates due to wind. Stable reference pressure can be measured.

  The reference pressure measurement auxiliary tool and the reference pressure measurement method having at least two intermediate portions where the hollow tube branches from the connection end and at least two detection ends connected to the intermediate portions include at least two intermediate portions and Since at least two or more detection end portions can measure a plurality of reference pressures and average the measured plurality of reference pressures, the reference pressure can be averaged, and the reference pressure can be measured at one location. The bias of the reference pressure due to the measurement can be prevented. The reference pressure measurement auxiliary tool and the reference pressure measurement method can stabilize the static pressure inside the hollow tube even if the atmospheric pressure near the detection end provided with the first air inlet / outlet fluctuates due to wind. A stable and averaged reference pressure can be measured.

  The hollow tube has at least two intermediate portions branched from the connection end portion and at least two detection end portions connected to the intermediate portions, and one of the at least two detection end portions is installed outdoors in the first direction. In the reference pressure measurement auxiliary tool and the reference pressure measurement method in which the other of the detection end portions is installed in the second direction opposite to the first direction, for example, one of the two detection end portions is installed on the north side. By installing the other on the south side, when the north wind is strong, the reference pressure can be measured from the detection end that is directly affected by the north wind and the detection end that is indirectly affected by the north wind. It is possible to prevent the reference pressure from being biased by detecting the reference pressure alone. Since the reference pressure measurement auxiliary tool and the reference pressure measurement method can average the reference pressure measured in the opposite direction, the reference pressure can be averaged and the reference pressure can be measured at one place. It is possible to prevent the bias of the reference pressure due to the. The reference pressure measurement auxiliary tool and the reference pressure measurement method can stabilize the static pressure inside the hollow tube even if the atmospheric pressure near the detection end provided with the first air inlet / outlet fluctuates due to wind. A stable and averaged reference pressure can be measured.

  The reference pressure measuring auxiliary tool and the reference pressure measuring method in which the detection end portion of the hollow tube has a closed tip and a peripheral side surface continuing from the closed tip, and the first air inlet / outlet is formed on the peripheral side. Compared with the case where is formed at the tip of the detection end, the influence of the wind at the first air inlet / outlet can be mitigated, so that a large fluctuation in the amount of air entering / leaving from the first air inlet / outlet can be prevented, Irregular and sudden changes in the static pressure inside the hollow tube can be prevented. The reference pressure measurement auxiliary tool and the reference pressure measurement method can stabilize the static pressure inside the hollow tube even if the atmospheric pressure near the detection end provided with the first air inlet / outlet fluctuates due to wind. Stable reference pressure can be measured.

A plurality of first air inlets / outlets are formed on the peripheral side surface, and the reference pressure measuring auxiliary tool and the reference pressure measuring method in which the opening area of the first air inlet / outlet port is in the range of 10 to 20 mm ² include a plurality of first air inlet / outlet ports on the peripheral side surface. By making the opening area of the first air inlet / outlet within the above range while forming the individual pieces, it is possible to prevent large fluctuations in the amount of air entering / leaving from the first air inlet / outlet, and the static pressure inside the hollow tube is irregularly and rapidly increased. Changes can be prevented. The reference pressure measurement auxiliary tool and the reference pressure measurement method can stabilize the static pressure inside the hollow tube even if the atmospheric pressure near the detection end provided with the first air inlet / outlet fluctuates due to wind. Stable reference pressure can be measured.

  A reference pressure in which the detection end of the hollow tube and the intermediate portion wound in a coil shape are accommodated in a breathable housing having an air flow window, and the connection end of the hollow tube is exposed from the housing. Compared to the case where the detection end and the intermediate part are not housed in the housing, the measurement auxiliary tool and the reference pressure measurement method alleviate the influence of the wind received by the detection end including the first air inlet / outlet by the housing. Therefore, large fluctuations in the amount of air entering and exiting from the first air inlet / outlet port can be prevented, and irregular and rapid changes in the static pressure inside the hollow tube can be prevented. The reference pressure measurement auxiliary tool and the reference pressure measurement method can stabilize the static pressure inside the hollow tube even if the atmospheric pressure near the detection end provided with the first air inlet / outlet fluctuates due to wind. Stable reference pressure can be measured.

  The reference pressure measurement auxiliary tool and the reference pressure measurement method in which the detection device for detecting the static pressure inside the hollow tube is connected to the connection end of the hollow tube is a stable static pressure from the hollow tube to the detection device. Therefore, a stable reference pressure can be measured in the detection device, and various control operations can be accurately executed using the reference pressure measured in the detection device.

The reference pressure in which the length from the detection end to the connection end of the hollow tube is in the range of 50 to 500 m, and the detection end, the connection end, the intermediate portion, and the inner diameter of the hollow tube are in the range of 4 to 20 mm. Even if the atmospheric pressure in the vicinity of the detection end provided with the first air inlet / outlet changes due to the influence of the wind, the measurement auxiliary tool and the reference pressure measurement method have the length and the inner diameter of the hollow tube within the above ranges. Due to the pressure resistance inside the hollow tube, the fluctuation of the static pressure amplitude inside the hollow tube with respect to the fluctuation of atmospheric pressure gradually decreases from the detection end toward the connection end, and the static inside the hollow pipe against the fluctuation of atmospheric pressure. Since the pressure cycle gradually increases from the detection end to the connection end, the static pressure inside the hollow tube can be reliably stabilized against fluctuations in the outdoor pressure, and the measured reference pressure is irregular. And a sudden change can be prevented reliably. The reference pressure measurement auxiliary tool and the reference pressure measurement method can stabilize the static pressure inside the hollow tube even if the atmospheric pressure near the detection end provided with the first air inlet / outlet fluctuates due to wind. Stable reference pressure can be measured.
A reference pressure measuring aid and a reference for stabilizing the static pressure inside the hollow tube against fluctuations in atmospheric pressure in the vicinity of the detection end in the range where the pressure difference between the detection end and the connection end is ± 10 to ± 150 Pa. In the pressure measurement method, the static pressure inside the hollow tube may change irregularly and suddenly due to the atmospheric pressure fluctuation in the range near the detection end, but the pressure resistance of the hollow tube may change the atmospheric pressure in the range. The fluctuation of the static pressure amplitude inside the hollow tube gradually decreases from the detection end toward the connection end, and the static pressure cycle inside the hollow tube gradually increases from the detection end toward the connection end. Therefore, the static pressure inside the hollow tube can be reliably stabilized against fluctuations in the atmospheric pressure within the above range, and irregular and sudden changes in the measured reference pressure can be reliably prevented. The reference pressure measurement auxiliary tool and the reference pressure measurement method can stabilize the static pressure inside the hollow tube even if the atmospheric pressure near the detection end provided with the first air inlet / outlet fluctuates due to wind. Stable reference pressure can be measured.

The perspective view of the reference pressure measurement auxiliary tool shown as an example. The perspective view of the detection end part shown as an example. The perspective view of the detection end part shown as another example. The perspective view of the reference pressure measurement auxiliary tool shown as another example. The perspective view of the reference pressure measurement auxiliary tool shown as another example. The perspective view of the reference pressure measurement auxiliary tool shown as another example. The perspective view of the reference pressure measurement auxiliary tool shown as another example. The perspective view of the reference pressure measurement auxiliary tool shown as another example. The perspective view of the reference pressure measurement auxiliary tool shown as another example. The perspective view of the reference pressure measurement auxiliary tool shown as another example. The figure showing the time change of the pressure measured using the reference pressure measurement auxiliary tool (in the case of hollow tube 100m). The figure showing the time change of the pressure measured using the reference pressure measurement auxiliary tool (in the case of 200 m of hollow tubes).

  The reference pressure measurement assisting tool and the reference pressure measuring method according to the present invention will be described in detail with reference to the accompanying drawings such as FIG. 1 which is a perspective view of the reference pressure measuring assisting tool 10A shown as an example. . 2 is a perspective view of the detection end 12 shown as an example, and FIG. 3 is a perspective view of the detection end 12 shown as another example. 2 and 3, the length direction (one direction) is indicated by an arrow A, the surrounding direction is indicated by an arrow B, and the radial direction is indicated by an arrow C. In this embodiment, the reference pressure measurement method is implemented using the reference pressure measurement auxiliary tool 10A (hollow tube 11) used for measuring the reference pressure of air outdoors (predetermined location) near the building. The measured reference pressure is used as a reference value for a control operation of a predetermined control device (control system). The predetermined location includes not only outdoors but also indoors of buildings.

  The reference pressure measurement auxiliary tool 10A is formed of a long hollow tube 11 that is long in the length direction. The hollow tube 11 is a hose having a circular cut shape (cross-sectional shape) cut in the radial direction, and is made of rubber, vinyl, plastic, cloth, or the like, and has flexibility to bend and extend. The cross-sectional shape of the hollow tube 11 includes all shapes such as a quadrangle and a polygon in addition to a circle. The hollow tube 11 includes a detection end 12 (front end), a connection end 14 (rear end) located on the opposite side of the detection end 12, and the detection end 12 and the connection end 14. And an intermediate portion 13 located therein.

  The detection end portion 12 is installed so as not to be displaced via a predetermined installation means in the outdoors (including indoors of the building) in the vicinity of the building, which is a measurement location of the air reference pressure. The intermediate part 13 and the connection end part 14 are installed indoors in the building. However, the intermediate part 13 may be installed outside the building. The connection end 14 is connected to a detection device 29 (see FIG. 10) that detects the static pressure inside the hollow tube 11. Examples of the detection device 29 include a fine pressure gauge, a differential pressure gauge, and a fine differential pressure gauge. The hollow tube 11 is installed in the detection end portion 12, the intermediate portion 13, and the connection end portion 14 so that the transmission of atmospheric pressure inside these portions 12 to 14 is not blocked.

  The detection end portion 12 shown in FIG. 2 has a peripheral side surface 15 extending in the circumferential direction, and includes an air first entrance 16. The first air inlet / outlet port 16 of the detection end 12 in FIG. 2 is an opening having a circular cross section formed at the tip of the detection end 12. The detection end 12 shown in FIG. 3 has a closed tip 17 and a peripheral side surface 18 continuing from the closed tip 17 and includes an even number (a plurality) of air first inlets 19A and 19B. The first air inlets 19 </ b> A and 19 </ b> B of the detection end 12 in FIG. 3 are rectangular openings formed in the peripheral side surface 18 and extending in the circumferential direction. In FIG. 3, the two first air inlets 19 </ b> A and 19 </ b> B are formed at positions 180 ° apart from each other in the circumferential direction on the peripheral side surface 18.

  The number of first air inlets 19A and 19B at the detection end 12 in FIG. 3 is not particularly limited, and four or more inlets and outlets may be formed on the peripheral side surface 18. The connection end portion 14 includes an air second doorway (not shown). The air second inlet / outlet is an opening having a circular cross section formed at the tip of the connecting end 14, similarly to the air first inlet / outlet 16 of the detection end 12 of FIG. 2.

  In the present invention, it is preferable to employ the first air inlets 19A and 19B shown in FIG. As shown in FIG. 2, when the first air inlet / outlet 16 is a circular opening formed at the tip of the detection end portion 12, the first air inlet / outlet 16 is directly affected by the wind blown outdoors, and is irregular and sudden. However, the air first inlet / outlet 19A, 19B is a rectangular opening formed on the peripheral side surface 18 of the detection end 12 as shown in FIG. In this case, the air first inlet / outlet 19A and 19B are not directly affected by the wind, and the influence of the wind at the air first inlet / outlet 19A and 19B can be mitigated, and the outdoor atmospheric pressure fluctuates irregularly and rapidly. This is because the air pressure of the air in contact with the first entrances 19A and 19B does not change greatly.

  In the reference pressure measurement auxiliary tool 10A, the measured static pressure (reference pressure) inside the hollow tube 11 (in the connection end 14) is used as a reference value for the control operation (for example, food back control) of the control device. Can do. The hollow tube 11 is configured such that air enters and exits at the first air inlets 16, 19 </ b> A, and 19 </ b> B of the detection end 12, and air enters and exits at the second air inlet / outlet of the connection end 14. The static pressure in the interior 11 changes to the plus side or the minus side around the predetermined pressure, and the measured reference pressure changes to the plus side or the minus side around the predetermined pressure.

  In addition, when the detection end 12 of the hollow tube 11 is installed outdoors, the atmospheric pressure in the vicinity of the detection end 12 is constantly fluctuated due to the influence of wind blowing outdoors. When the atmospheric pressure in the vicinity of the detection end 12 fluctuates (for example, when the pressure difference between the detection end 12 and the connection end 14 fluctuates within a range of ± 10 to ± 150 Pa), it is transmitted from the first air inlet / outlet ports 16, 19A, 19B. The atmospheric pressure changes greatly, the fluctuation of the amplitude of the static pressure inside the hollow tube 11 increases, the cycle of the static pressure inside the hollow tube 11 becomes shorter, and the static pressure inside the hollow tube 11 becomes unstable. The measured reference pressure changes irregularly and rapidly. If the reference pressure changes irregularly and suddenly, the control device may malfunction or overact.

  In the reference pressure measurement auxiliary tool 10A, the static pressure inside the hollow tube 11 is reduced by the pressure resistance of the hollow tube 11 (friction resistance between the inner peripheral surface 20 of the hollow tube 11 and the air inside the hollow tube 11). As the amplitude fluctuation gradually decreases from the detection end 12 toward the connection end 14, the period of static pressure inside the hollow tube 11 gradually increases from the detection end 12 toward the connection end 14 and blows outdoors. The static pressure inside the hollow tube 11 is stabilized against atmospheric pressure fluctuation due to the influence of wind. Therefore, in the hollow tube 11, even if the static pressure at the detection end 12 and the intermediate portion 13 in the vicinity of the end 12 becomes unstable with respect to atmospheric pressure fluctuation, The static pressure at 13 is stabilized and a stable reference pressure is measured. Moreover, the reference | standard pressure measured in the connection end part 14 can be stabilized further by employ | adopting the air 1st inlet-and-outlet ports 19A and 19B shown in FIG.

The first air inlets 19A and 19B of the detection end 12 in FIG. 3 have an opening area in the range of 10 to 20 mm ² . If the opening area of the first air inlet / outlet 19A, 19B is less than 10 mm ^2, it is difficult to enter / exit air at the inlet / outlet 19A, 19B, and the reference pressure may not be measured. When the opening area of the first air inlet / outlet 19A, 19B exceeds 20 mm ² , the inlet / outlet 19A / 19B is easily affected by the wind, and the atmospheric pressure of the outside air that fluctuates irregularly and rapidly acts on the inlet / outlet 19A / 19B. It is difficult to mitigate the effects of wind in 19A and 19B.

  The hollow tube 11 has a length in the range of 50 to 500 m from the detection end 12 (tip of the end 12) to the connection end 14 (rear end of the end 14). If the length is less than 50 m, the internal resistance of the hollow tube 11 does not sufficiently act, and the fluctuation in the static pressure inside the hollow tube 11 due to the fluctuation of the atmospheric pressure in the vicinity of the detection end 12 is connected from the detection end 12. It cannot be reduced toward the end portion 14, and the period of static pressure inside the hollow tube 11 cannot be increased from the detection end portion 12 toward the connection end portion 14. As a result, the static pressure inside the hollow tube 11 cannot be stabilized against atmospheric pressure fluctuations. If the length exceeds 500 m, the effect of reducing the amplitude fluctuation of the static pressure inside the hollow tube 11 from the detection end 12 toward the connection end 14 is not improved even if the length is further increased. The effect of lengthening the period of static pressure inside the hollow tube 11 from the detection end 12 toward the connection end 14 is not only improved, but the hollow tube 11 is bulky and the hollow tube 11 is located at the installation location. May get in the way.

  The hollow tube 11 has an inner diameter L (diameter in the radial direction) of the detection end portion 12, the intermediate portion 13, and the connection end portion 14 in the range of 4 to 20 mm. When the inner diameter L of these portions 12 to 14 is less than 4 mm, the pressure resistance inside the hollow tube 11 becomes too large, and the fluctuation in the amplitude of the static pressure inside the hollow tube 11 due to the fluctuation in the atmospheric pressure near the detection end 12 is small. At the same time, the period of the static pressure inside the hollow tube 11 becomes too long, and it is impossible to measure an appropriate reference pressure due to a change in atmospheric pressure near the detection end 12. When the inner diameter L of these portions 12 to 14 exceeds 20 mm, the pressure resistance inside the hollow tube 11 becomes small, and the fluctuation of the static pressure amplitude inside the hollow tube 11 due to the fluctuation of the atmospheric pressure near the detection end 12 is detected. It cannot be reduced from the end 12 toward the connection end 14, and the period of static pressure inside the hollow tube 11 cannot be increased from the detection end 12 toward the connection end 14. As a result, the static pressure inside the hollow tube 11 cannot be stabilized against atmospheric pressure fluctuations.

  The reference pressure measurement assisting tool 10A and the reference pressure measuring method using the assisting tool 10A shown in FIG. 1 are long and flexible in one direction for measurement of the air reference pressure outdoors in the vicinity of the building. The air pipe 11 is used, and the atmospheric pressure in the vicinity of the detection end portion 12 provided with the first air inlet / outlet ports 16, 19A, 19B fluctuates due to the influence of wind blowing outdoors, and the atmospheric pressure transmitted from the inlet / outlet ports 16, 19A, 19B Even if there is a large change, the fluctuation of the amplitude of the static pressure inside the hollow tube 11 with respect to the fluctuation of the atmospheric pressure due to the pressure resistance inside the hollow tube 11 gradually decreases from the detection end 12 toward the connection end 14, Since the period of static pressure in the hollow tube 11 with respect to fluctuations in atmospheric pressure gradually increases from the detection end 12 toward the connection end 14, the static pressure in the hollow pipe 11 is stabilized against fluctuations in outdoor atmospheric pressure. Is to be able, it can prevent irregular and rapid change of the measured reference pressure.

  The reference pressure measurement assisting tool 10A and the reference pressure measuring method using the assisting tool 10A shown in FIG. 1 are in the vicinity of the detection end 12 in the range of pressure difference ± 10 ± 150 Pa between the detection end 12 and the connection end 14. Although the static pressure inside the hollow tube 11 may change irregularly and suddenly due to the atmospheric pressure fluctuation, the static pressure inside the hollow tube 11 varies with the atmospheric pressure fluctuation in the above range due to the pressure resistance of the hollow tube 11. The fluctuation in amplitude gradually decreases from the detection end 12 toward the connection end 14 and the period of static pressure inside the hollow tube 11 gradually increases from the detection end 12 toward the connection end 14. It is possible to reliably stabilize the static pressure inside the hollow tube 11 against fluctuations in the atmospheric pressure in the range, and to reliably prevent irregular and sudden changes in the measured reference pressure. The reference pressure measurement assisting tool 10A and the reference pressure measuring method using the assisting tool 10A are stable even if the air pressure fluctuates in the vicinity of the detection end 12 provided with the first air inlet / outlet port 16, 19A, 19B. Therefore, it is possible to prevent malfunction or overoperation of the control operation of the control device due to irregular and abrupt changes in the reference pressure.

  FIG. 4 is a perspective view of a reference pressure measurement auxiliary tool 10B shown as another example. This reference pressure measurement auxiliary tool 10B is different from that of FIG. 1 in that the intermediate portion 13 of the hollow tube 11 is wound in a coil shape, and the other configuration is the same as the reference pressure measurement auxiliary tool 10A of FIG. Since they are the same, the same reference numerals as those in FIG. 1 are attached, and the description of FIG. 1 is used, and detailed description of other configurations in the reference pressure measurement auxiliary tool 10B is omitted.

  The reference pressure measurement auxiliary tool 10B is formed of a long hollow tube 11 that is long in the length direction, similar to that of FIG. The hollow tube 11 is a hose having a circular cross-sectional shape, and has flexibility to bend and extend freely. The hollow tube 11 includes a detection end 12 having air first inlets 16, 19 </ b> A, 19 </ b> B, a connection end 14 having an air second inlet / outlet located on the opposite side of the detection end 12, and a detection end And an intermediate portion 13 located between the portion 12 and the connecting end portion 14.

  The hollow tube 11 has an intermediate portion 13 wound in a coil shape. The hollow tube 11 is installed in the detection end portion 12, the intermediate portion 13, and the connection end portion 14 so that the transmission of atmospheric pressure inside these portions 12 to 14 is not blocked. The detection end 12 is installed outdoors near the building. The intermediate part 13 and the connection end part 14 are installed indoors in the building.

  The first air inlet / outlet port 16, 19A, 19B and the second air inlet / outlet port in the reference pressure measurement auxiliary tool 10B are the same as those of the hollow tube 11 in FIG. 1 (see FIGS. 2 and 3). When the first air inlets 19A and 19B in FIG. 3 are employed, the opening areas of the inlets 19A and 19B are the same as those described in the hollow tube 11 in FIG. The length from the detection end 12 of the hollow tube 11 to the connection end 14 and the inner diameter L of the detection end 12, the intermediate portion 13, and the connection end 14 of the hollow tube 11 are the same as those of the hollow tube 11 of FIG. Identical to those described.

  In this reference pressure measurement assisting tool 10B, the atmospheric pressure in the vicinity of the detection end 12 provided with the first air inlet / outlet ports 16, 19A, 19B fluctuates due to the influence of wind blowing outdoors, and is transmitted from the inlet / outlet ports 16, 19A, 19B. Even if the atmospheric pressure changes greatly, the fluctuation of the static pressure amplitude inside the hollow tube 11 gradually decreases from the detection end 12 toward the connection end 14 due to the pressure resistance of the hollow tube 11, and the hollow tube 11 The period of the static pressure inside 11 gradually becomes longer from the detection end 12 toward the connection end 14, and the static pressure inside the hollow tube 11 is stabilized against atmospheric pressure fluctuations due to the effect of wind blowing outdoors. Therefore, in the hollow tube 11, even if the static pressure at the detection end 12 and the intermediate portion 13 in the vicinity of the end 12 becomes unstable with respect to atmospheric pressure fluctuation, the connection end 14 and the intermediate portion in the vicinity of the end 14. The static pressure at 13 is stabilized and a stable reference pressure is measured.

  The reference pressure measurement auxiliary tool 10B and the reference pressure measurement method using the auxiliary tool 10B shown in FIG. 4 are in addition to the effects of the reference pressure measurement auxiliary tool 10A and the reference pressure measurement method using the auxiliary tool 10A shown in FIG. Have the following effects. The reference pressure measurement auxiliary tool 10B and the reference pressure measurement method using the auxiliary tool 10B of FIG. 4 make the long hollow tube 11 compact by winding the intermediate portion 13 of the hollow tube 11 in a coil shape. Therefore, the hollow tube 11 can be installed at a predetermined location without taking up space.

  FIG. 5 is a perspective view of a reference pressure measurement auxiliary tool 10C shown as another example. This reference pressure measurement auxiliary tool 10C is different from that of FIG. 1 in that the intermediate portion 13 of the hollow tube 11 is wound in a coil shape, and the detection end portion 12 is branched from the intermediate portion 13 into two. Since the other configuration is the same as that of the reference pressure measurement auxiliary tool 10A in FIG. 1, the same reference numerals as those in FIG. 1 are given, and the explanation of FIG. A detailed description of the configuration will be omitted.

  The reference pressure measurement auxiliary tool 10C is formed of a long hollow tube 11 that is long in the length direction, similar to that of FIG. The hollow tube 11 is a hose having a circular cross-sectional shape, and has flexibility to bend and extend freely. The hollow tube 11 includes a detection end 12 having air first inlets 16, 19 </ b> A, 19 </ b> B, a connection end 14 having an air second inlet / outlet located on the opposite side of the detection end 12, and a detection end And an intermediate portion 13 located between the portion 12 and the connecting end portion 14.

  The hollow tube 11 has an intermediate portion 13 wound in a coil shape. The hollow tube 11 is installed in the detection end portion 12, the intermediate portion 13, and the connection end portion 14 so that the transmission of atmospheric pressure inside these portions 12 to 14 is not blocked. The detection end portion 12 is formed of a first detection end portion 12A and a second detection end portion 12B that branch into two from the intermediate portion 13. The first and second detection end portions 12A and 12B are installed outdoors near the building. The detection end portions 12A and 12B may be installed at locations close to each other or at locations separated by a predetermined distance. Note that the detection end 12 may be branched from the intermediate portion 13 into three or more. The intermediate part 13 and the connection end part 14 are installed indoors in the building.

  The first air inlet / outlet port 16, 19A, 19B and the second air inlet / outlet port in the reference pressure measuring auxiliary tool 10C are the same as those of the hollow tube 11 in FIG. 1 (see FIGS. 2 and 3). When the first air inlets 19A and 19B in FIG. 3 are employed, the opening areas of the inlets 19A and 19B are the same as those described in the hollow tube 11 in FIG. The length from the detection end 12 (12A or 12B) of the hollow tube 11 to the connection end 14 and the inner diameter L of the detection ends 12A, 12B, the intermediate portion 13 and the connection end 14 of the hollow tube 11 are shown in FIG. These are the same as those described for one hollow tube 11.

  In this reference pressure measurement assisting tool 10C, the air pressure in the vicinity of the detection end portions 12A, 12B provided with the first air inlet / outlet ports 16, 19A, 19B fluctuates due to the influence of the wind blowing outside, and the air pressure from the inlet / outlet ports 16, 19A, 19B changes. Even if the transmitted atmospheric pressure changes greatly, the pressure resistance of the hollow tube 11 causes the variation in the amplitude of the static pressure inside the hollow tube 11 to gradually decrease from the detection end 12 toward the connection end 14. The period of static pressure inside the hollow tube 11 gradually increases from the detection end 12 toward the connection end 14, and the static pressure inside the hollow tube 11 is stabilized against atmospheric pressure fluctuations due to the effect of wind blowing outdoors. To do. Therefore, in the hollow tube 11, even if the static pressure at the detection end portions 12 </ b> A and 12 </ b> B and the intermediate portion 13 in the vicinity of the end portions 12 </ b> A and 12 </ b> B becomes unstable with respect to atmospheric pressure fluctuation, the connection end portion 14 and end portion 14. The static pressure in the nearby intermediate portion 13 is stabilized, and a stable reference pressure is measured.

  The reference pressure measurement auxiliary tool 10C and the reference pressure measurement method using the auxiliary tool 10C shown in FIG. 5 are in addition to the effects of the reference pressure measurement auxiliary tool 10A and the reference pressure measurement method using the auxiliary tool 10A shown in FIG. Have the following effects. The reference pressure measuring auxiliary tool 10C and the reference pressure measuring method using the auxiliary tool 10C of FIG. 5 make the long hollow tube 11 compact by winding the intermediate portion 13 of the hollow tube 11 in a coil shape. Therefore, the hollow tube 11 can be installed at a predetermined location without taking up space. Further, even if one of the detection end portions 12A and 12B is blocked for some reason, the reference pressure can be measured by the other of the detection end portions 12A and 12B, and the reference pressure is measured due to the detection end portion 12 being blocked. Impossibility can be prevented.

  FIG. 6 is a perspective view of a reference pressure measurement auxiliary tool 10D shown as another example. This reference pressure measurement assisting tool 10D is different from that of FIG. 1 in that the intermediate portion 13 of the hollow tube 11 is wound in a coil shape, two detection end portions 12A and 12B, and two intermediate portions 13A and 13B. Since the other configuration is the same as the reference pressure measurement auxiliary tool 10A of FIG. 1, the same reference numerals as those in FIG. 1 are used, and the description of FIG. Detailed description of other components in 10D will be omitted.

  The reference pressure measurement auxiliary tool 10D is formed of a long hollow tube 11 that is long in the length direction, similar to that of FIG. The hollow tube 11 is a hose having a circular cross-sectional shape, and has flexibility to bend and extend freely. The hollow tube 11 includes a detection end 12 having air first inlets 16, 19 </ b> A, 19 </ b> B, a connection end 14 having an air second inlet / outlet located on the opposite side of the detection end 12, and a detection end And an intermediate portion 13 located between the portion 12 and the connecting end portion 14. The hollow tube 11 is installed in the detection end portion 12, the intermediate portion 13, and the connection end portion 14 so that the transmission of atmospheric pressure inside these portions 12 to 14 is not blocked.

  The intermediate portion 13 is formed of two first intermediate portions 13A and a second intermediate portion 13B that branch from the connection end portion 14. The intermediate portions 13A and 13B are wound in a coil shape. The detection end portion 12 is formed of two first detection end portions 12A and a second detection end portion 12B connected to the intermediate portions 13A and 13B. These detection end parts 12A and 12B are installed outdoors near the building. The intermediate portions 13A and 13B and the connection end portion 14 are installed indoors in the building. In addition, the intermediate part 13 may be formed from three or more of them branched from the connection end part 14, and the detection end part 12 may be formed of three or more of them continuing from the intermediate part 13.

  The first air inlet / outlet port 16, 19A, 19B and the second air inlet / outlet port in the reference pressure measurement auxiliary tool 10D are the same as those of the hollow tube 11 in FIG. 1 (see FIGS. 2 and 3). When the first air inlets 19A and 19B in FIG. 3 are employed, the opening areas of the inlets 19A and 19B are the same as those described in the hollow tube 11 in FIG. The length from the detection end 12 (12A or 12B) of the hollow tube 11 to the connection end 14 and the inner diameter L of the detection ends 12A, 12B, the intermediate portions 13A, 13B of the hollow tube 11 and the connection end 14 are as follows. These are the same as those described in the hollow tube 11 of FIG.

  In this reference pressure measurement auxiliary tool 10D, the air pressure in the vicinity of the detection end portions 12A, 12B provided with the first air inlet / outlet ports 16, 19A, 19B fluctuates due to the wind blown outdoors, and the air pressure from the inlets / outlets 16, 19A, 19B changes. Even if the transmitted atmospheric pressure changes greatly, due to the internal resistance of the hollow tube 11, the fluctuation in the amplitude of the static pressure inside the hollow tube 11 gradually decreases from the detection end 12 toward the connection end 14, The period of static pressure inside the hollow tube 11 gradually increases from the detection end 12 toward the connection end 14, and the static pressure inside the hollow tube 11 is stabilized against atmospheric pressure fluctuations due to the effect of wind blowing outdoors. In addition, the static pressure is averaged by the two detection end portions 12A and 12B and the two intermediate portions 13A and 13B. Therefore, in the hollow tube 11, even if the static pressure in the intermediate portions 13A and 13B in the vicinity of the detection end portions 12A and 12B and the end portions 12A and 12B becomes unstable with respect to the atmospheric pressure fluctuation, the connection end portion 14 In addition, the static pressure in the intermediate portions 13A and 13B in the vicinity of the end portion 14 is stabilized, and a stable and averaged reference pressure is measured.

  The reference pressure measurement auxiliary tool 10D shown in FIG. 6 and the reference pressure measurement method using the auxiliary tool 10D are in addition to the effects of the reference pressure measurement auxiliary tool 10A and the reference pressure measurement method using the auxiliary tool 10A shown in FIG. Have the following effects. In the reference pressure measurement assisting tool 10D and the reference pressure measuring method using the assisting tool 10D in FIG. 6, the long hollow tube 11 is made compact by winding the intermediate portions 13A and 13B of the hollow tube 11 in a coil shape. Therefore, the hollow tube 11 can be installed at a predetermined place without taking up space. Further, since the two reference pressures can be measured at the two intermediate portions 13A and 13B and the two detection end portions 12A and 12B, and the average of the two measured reference pressures can be taken, the reference pressure is averaged. It is possible to prevent the reference pressure from being biased by measuring the reference pressure at one location.

  FIG. 7 is a perspective view of a reference pressure measurement auxiliary tool 10E shown as another example. This reference pressure measurement auxiliary tool 10E differs from that of FIG. 1 in that the intermediate portion 13 of the hollow tube 11 is wound in a coil shape, two detection end portions 12A and 12B, and two intermediate portions 13A and 13B. One detection end 12A is installed outdoors in the first direction, and the other detection end 12B is installed in a second direction opposite to the first direction, Since the other configuration is the same as the reference pressure measurement assisting tool 10A in FIG. 1, the same reference numerals as those in FIG. 1 are attached, and the description of FIG. The detailed explanation is omitted.

  The reference pressure measurement auxiliary tool 10E is formed of a long hollow tube 11 that is long in the length direction, similarly to that of FIG. The hollow tube 11 is a hose having a circular cross-sectional shape, and has flexibility to bend and extend freely. The hollow tube 11 includes a detection end 12 having air first inlets 16, 19 </ b> A, 19 </ b> B, a connection end 14 having an air second inlet / outlet located on the opposite side of the detection end 12, and a detection end And an intermediate portion 13 located between the portion 12 and the connecting end portion 14. The hollow tube 11 is installed in the detection end portion 12, the intermediate portion 13, and the connection end portion 14 so that the transmission of atmospheric pressure inside these portions 12 to 14 is not blocked.

  The intermediate portion 13 is formed of two first intermediate portions 13A and a second intermediate portion 13B that branch from the connection end portion 14. The intermediate portions 13A and 13B are wound in a coil shape. The detection end portion 12 is formed of two first detection end portions 12A and a second detection end portion 12B connected to the intermediate portions 13A and 13B. One detection end 12A is installed outdoors near the building in a first direction (for example, the north side of the building), and the other detection end 12B is a second direction opposite to the first direction. It is installed outdoors near the building (for example, on the south side of the building). The intermediate portions 13A and 13B and the connection end portion 14 are installed indoors in the building.

  The first air inlet / outlet port 16, 19A, 19B and the second air inlet / outlet port in the reference pressure measurement auxiliary tool 10E are the same as those of the hollow tube 11 in FIG. 1 (see FIGS. 2 and 3). When the first air inlets 19A and 19B in FIG. 3 are employed, the opening areas of the inlets 19A and 19B are the same as those described in the hollow tube 11 in FIG. The length from the detection end 12 (12A or 12B) of the hollow tube 11 to the connection end 14 and the inner diameter L of the detection ends 12A, 12B, the intermediate portions 13A, 13B of the hollow tube 11 and the connection end 14 are as follows. These are the same as those described in the hollow tube 11 of FIG.

  In this reference pressure measurement auxiliary tool 10E, the air pressure in the vicinity of the detection end portions 12A, 12B provided with the first air inlets 16, 19A, 19B fluctuates due to the influence of wind blowing outdoors, and the air pressure from the inlets 16, 19A, 19B changes. Even if the transmitted atmospheric pressure changes greatly, the fluctuation of the static pressure amplitude inside the hollow tube 11 gradually decreases from the detection end portions 12A and 12B toward the connection end portion 14 due to the internal resistance of the hollow tube 11. At the same time, the period of the static pressure inside the hollow tube 11 gradually increases from the detection end portions 12A and 12B toward the connection end portion 14, and the static pressure inside the hollow tube 11 against the atmospheric pressure fluctuation due to the wind blowing outdoors. While the pressure is stabilized, the static pressure is averaged by the two detection end portions 12A and 12B and the two intermediate portions 13A and 13B. Therefore, in the hollow tube 11, even if the static pressure in the intermediate portions 13A and 13B in the vicinity of the detection end portions 12A and 12B and the end portions 12A and 12B becomes unstable with respect to the atmospheric pressure fluctuation, the connection end portion 14 In addition, the static pressure in the intermediate portions 13A and 13B in the vicinity of the end portion 14 is stabilized, and a stable and averaged reference pressure is measured.

  The reference pressure measurement auxiliary tool 10E and the reference pressure measurement method using the auxiliary tool 10E shown in FIG. 7 are in addition to the effects of the reference pressure measurement auxiliary tool 10A and the reference pressure measurement method using the auxiliary tool 10A shown in FIG. Have the following effects. The reference pressure measurement assisting tool 10E and the reference pressure measuring method using the assisting tool 10E of FIG. 7 make the long hollow tube 11 compact by winding the intermediate portions 13A and 13B of the hollow tube 11 in a coil shape. Therefore, the hollow tube 11 can be installed at a predetermined location without taking up space.

  The reference pressure measurement auxiliary tool 10E of FIG. 7 and the reference pressure measurement method using the auxiliary tool 10E are, for example, by installing one of the two detection end portions 12A and 12B on the north side and the other on the south side. When the north wind is strong, the reference pressure can be measured from the detection end portion 12A that is directly affected by the north wind and the detection end portion 12B that is indirectly affected by the north wind, and the reference pressure is detected only at one location. It is possible to prevent the bias of the reference pressure due to the. In addition, since two reference pressures can be measured at the two intermediate portions 13A and 13B and the two detection end portions 12A and 12B, and an average of the two reference pressures measured in completely opposite directions can be taken. The pressure can be averaged, and the deviation of the reference pressure due to the measurement of the reference pressure at one location can be prevented.

  FIG. 8 is a perspective view of a reference pressure measurement auxiliary tool 10F shown as another example. The reference pressure measurement assisting tool 10F is different from that shown in FIG. 1 in that the intermediate portion 13 of the hollow tube 11 is wound in a coil shape, the two detection end portions 12 and the two intermediate portions 13A and 13B. The detection end 12 has two branches from the intermediate portions 13A and 13B, one detection end 12A and 12B is installed outdoors in the first direction, and the other detection end 12C and 12D. Is installed in a second direction opposite to the first direction, and the other configuration is the same as the reference pressure measurement auxiliary tool 10A in FIG. Referring to FIG. 1, detailed description of other components of the reference pressure measurement auxiliary tool 10F will be omitted.

  The reference pressure measurement auxiliary tool 10E is formed of a long hollow tube 11 that is long in the length direction, similarly to that of FIG. The hollow tube 11 is a hose having a circular cross-sectional shape, and has flexibility to bend and extend freely. The hollow tube 11 includes a detection end 12 having air first inlets 16, 19 </ b> A, 19 </ b> B, a connection end 14 having an air second inlet / outlet located on the opposite side of the detection end 12, and a detection end And an intermediate portion 13 located between the portion 12 and the connecting end portion 14. The hollow tube 11 is installed in the detection end portion 12, the intermediate portion 13, and the connection end portion 14 so that the transmission of atmospheric pressure inside these portions 12 to 14 is not blocked.

  The intermediate portion 13 is formed of two first intermediate portions 13A and a second intermediate portion 13B that branch from the connection end portion 14. The intermediate portions 13A and 13B are wound in a coil shape. The detection end portion 12 is connected to the intermediate portions 13A and 13B, and the first and second detection end portions 12A and 12B and the third and fourth detection end portions 12C and 12D branch from the intermediate portions 13A and 13B into two. Formed from. One detection end 12A, 12B is installed outdoors near the building in the first direction (for example, the north side of the building), and the other detection end 12C, 12D is opposite to the first direction. It is installed outdoors near the building in the second direction (for example, the south side of the building). The intermediate portions 13A and 13B and the connection end portion 14 are installed indoors in the building.

  The first air inlet / outlet port 16, 19A, 19B and the second air inlet / outlet port in the reference pressure measurement auxiliary tool 10F are the same as those of the hollow tube 11 in FIG. 1 (see FIGS. 2 and 3). When the first air inlets 19A and 19B in FIG. 3 are employed, the opening areas of the inlets 19A and 19B are the same as those described in the hollow tube 11 in FIG. The length from the detection end 12 (12A to 12D) of the hollow tube 11 to the connection end 14 and the inner diameter L of the detection ends 12A to 12D, the intermediate portions 13A and 13B, and the connection end 14 of the hollow tube 11 are as follows. These are the same as those described in the hollow tube 11 of FIG.

  In this reference pressure measurement assisting tool 10F, the air pressure in the vicinity of the detection end portions 12A to 12D provided with the first air inlet / outlet ports 16, 19A, 19B fluctuates due to the wind blown outdoors, and the air pressure from the inlet / outlet ports 16, 19A, 19B changes. Even if the transmitted atmospheric pressure changes greatly, the fluctuation of the static pressure amplitude inside the hollow tube 11 gradually decreases from the detection end portions 12A to 12D toward the connection end portion 14 due to the internal resistance of the hollow tube 11. At the same time, the cycle of the static pressure inside the hollow tube 11 gradually becomes longer from the detection end portions 12A to 12D toward the connection end portion 14, and the static pressure inside the hollow tube 11 against the atmospheric pressure fluctuation due to the wind blowing outdoors. While the pressure is stabilized, the static pressure is averaged by the detection end portions 12A to 12D and the two intermediate portions 13A and 13B. Therefore, in the hollow tube 11, even if the static pressure in the intermediate portions 13A and 13B in the vicinity of the detection end portions 12A to 12D and the end portions 12A to 12D becomes unstable with respect to the atmospheric pressure fluctuation, the connection end portion 14 In addition, the static pressure in the intermediate portions 13A and 13B in the vicinity of the end portion 14 is stabilized, and a stable and averaged reference pressure is measured.

  The reference pressure measurement auxiliary tool 10F and the reference pressure measurement method using the auxiliary tool 10F shown in FIG. 8 are in addition to the effects of the reference pressure measurement auxiliary tool 10A and the reference pressure measurement method using the auxiliary tool 10A shown in FIG. Have the following effects. The reference pressure measurement assisting tool 10F and the reference pressure measuring method using the assisting tool 10F in FIG. 8 make the long hollow tube 11 compact by winding the intermediate portions 13A and 13B of the hollow tube 11 in a coil shape. Therefore, the hollow tube 11 can be installed at a predetermined location without taking up space. Moreover, even if one of the detection end portions 12A and 12B is blocked for some reason, or one of the detection end portions 12C and 12D is blocked for some reason, the other detection end portions 12A to 12D are used as a reference. The pressure can be measured, and the inability to measure the reference pressure due to the detection ends 12A to 12D being blocked can be prevented.

  The reference pressure measurement auxiliary tool 10F in FIG. 8 and the reference pressure measurement method using the auxiliary tool 10F are, for example, the detection ends 12A and 12B among the detection ends 12A to 12D are installed on the north side, and the detection ends are arranged. By installing the detection ends 12C and 12D among the portions 12A to 12D on the south side, when the north wind is strong, the detection ends 12A and 12B that are directly affected by the north wind and the detection ends that are indirectly affected by the north wind The reference pressure can be measured from 12C and 12D, and deviation of the reference pressure due to detection of the reference pressure only at one location can be prevented. In addition, since two reference pressures can be measured at the two intermediate portions 13A and 13B and the two detection end portions 12A and 12B, and an average of the two reference pressures measured in completely opposite directions can be taken. The pressure can be averaged, and the deviation of the reference pressure due to the measurement of the reference pressure at one location can be prevented.

  FIG. 9 is a perspective view of a reference pressure measurement auxiliary tool 10G shown as another example. This reference pressure measurement assisting tool 10G is different from that of FIG. 1 in that the intermediate portion 13 of the hollow tube 11 is wound in a coil shape, and the detection end portion 12 and the intermediate portion 13 are inside the casing 21. Since the other configuration is the same as the reference pressure measurement auxiliary tool 10A in FIG. 1, the same reference numerals as those in FIG. 1 are used, and the description of FIG. Detailed description of the other components in the tool 10G will be omitted.

  The reference pressure measurement auxiliary tool 10G is formed of a long hollow tube 11 that is long in the length direction, similar to that of FIG. The hollow tube 11 is a hose having a circular cross-sectional shape, and has flexibility to bend and extend freely. The hollow tube 11 includes a detection end 12 having air first inlets 16, 19 </ b> A, 19 </ b> B, a connection end 14 having an air second inlet / outlet located on the opposite side of the detection end 12, and a detection end And an intermediate portion 13 located between the portion 12 and the connecting end portion 14.

  The hollow tube 11 has an intermediate portion 13 wound in a coil shape. In the hollow tube 11, the detection end portion 12 and the intermediate portion 13 are accommodated inside the housing 21 (box), and the connection end portion 14 is exposed from the housing 21 to the outside. The hollow tube 11 is installed in the detection end portion 12, the intermediate portion 13, and the connection end portion 14 so that the transmission of atmospheric pressure inside these portions 12 to 14 is not blocked.

  The casing 21 is installed outdoors near the building. Note that the casing 21 may be installed indoors in a building. The casing 21 is a hexahedron box in which quadrangular walls are orthogonal to each other, and is formed of top and bottom walls 22 and 23 facing each other and side walls 24 to 27 extending between the top and bottom walls 22 and 23. Yes. A rectangular air flow window 28 through which air passes is formed on the side wall 24 and the side wall 26. In the housing 21, the air that has entered from the air circulation window 28 flows out from the air circulation window 28. Therefore, the housing | casing 21 has air permeability. The air circulation window 28 may be formed not only on the side wall 24 and the side wall 26 but also on the side wall 25 and the side wall 27.

  The first air inlet / outlet port 16, 19A, 19B and the second air inlet / outlet port in the reference pressure measurement auxiliary tool 10G are the same as those of the hollow tube 11 in FIG. 1 (see FIGS. 2 and 3). When the first air inlets 19A and 19B in FIG. 3 are employed, the opening areas of the inlets 19A and 19B are the same as those described in the hollow tube 11 in FIG. The length from the detection end 12 of the hollow tube 11 to the connection end 14 and the inner diameter L of the detection end 12, the intermediate portion 13, and the connection end 14 of the hollow tube 11 are the same as those of the hollow tube 11 of FIG. Identical to those described.

  The hollow tube 11 (reference pressure measurement auxiliary tool 10 </ b> C) shown in FIG. 5 may be accommodated inside the housing 21. In this case, the intermediate portion 13 and the detection end portions 12 </ b> A and 12 </ b> B branched into two are accommodated in the housing 21. The hollow tube 11 (reference pressure measurement auxiliary tool 10D) illustrated in FIG. 6 may be accommodated in the housing 21. In this case, one of the two detection end portions 12 </ b> A and 12 </ b> B and the two intermediate portions 13 </ b> A and 13 </ b> B is housed in the first housing 21, and the other is housed in the second housing 21. In addition, the hollow tube 11 (reference pressure measurement auxiliary tool 10E, reference pressure measurement auxiliary tool 10D) shown in FIGS.

  In this reference pressure measurement assisting tool 10G, the air pressure in the vicinity of the detection end 12 provided with the first air inlet / outlet ports 16, 19A, 19B fluctuates due to the influence of the wind blowing outside the casing 21, and the inlet / outlet ports 16, 19A, 19B. Even if the pressure transmitted from the air changes greatly, due to the internal resistance of the hollow tube 11, the fluctuation of the static pressure amplitude inside the hollow tube 11 gradually decreases from the detection end 12 toward the connection end 14. The period of the static pressure inside the hollow tube 11 gradually increases from the detection end 12 toward the connection end 14, and the static pressure inside the hollow tube 11 is stable against atmospheric pressure fluctuations due to the wind blowing outdoors. Turn into. Therefore, in the hollow tube 11, even if the static pressure at the detection end 12 and the intermediate portion 13 in the vicinity of the end 12 becomes unstable with respect to atmospheric pressure fluctuation, the connection end 14 and the intermediate portion in the vicinity of the end 14. The static pressure at 13 is stabilized and a stable reference pressure is measured.

  The reference pressure measurement auxiliary tool 10G and the reference pressure measurement method using the auxiliary tool 10G shown in FIG. 9 are in addition to the effects of the reference pressure measurement auxiliary tool 10A and the reference pressure measurement method using the auxiliary tool 10A shown in FIG. Have the following effects. The reference pressure measurement auxiliary tool 10G and the reference pressure measurement method using the auxiliary tool 10G of FIG. 9 make the long hollow tube 11 compact by winding the intermediate portion 12 of the hollow tube 11 in a coil shape. Therefore, the hollow tube 11 can be accommodated inside the housing 21, and the hollow tube 11 can be placed in a predetermined place without taking up space by installing the housing 21 outdoors near the building. Can be installed. Compared to the case where the detection end 12 and the intermediate portion 13 are not accommodated in the casing 21, the influence of the wind received by the detection end 12 having the first air inlet / outlet ports 16, 19 </ b> A, 19 </ b> B is affected by the casing 21. Therefore, it is possible to prevent large fluctuations in the amount of air flowing in and out of the first air inlet / outlet ports 16, 19 </ b> A, 19 </ b> B, and to prevent irregular and sudden changes in the static pressure inside the hollow tube 11. it can.

  FIG. 10 is a perspective view of a reference pressure measurement auxiliary tool 10H shown as another example. This reference pressure measurement auxiliary tool 10H is different from that of FIG. 1 in that the intermediate portion 13 of the hollow tube 11 is wound in a coil shape, and the detection device 29 is connected to the connection end portion 14. Since the other configuration is the same as the reference pressure measurement assisting tool 10A in FIG. 1, the same reference numerals as those in FIG. 1 are attached, and the description of FIG. The detailed explanation is omitted.

  The reference pressure measurement auxiliary tool 10H is formed of a long hollow tube 11 that is long in the length direction, similar to that of FIG. The hollow tube 11 is a hose having a circular cross-sectional shape, and has flexibility to bend and extend freely. The hollow tube 11 includes a detection end 12 having air first inlets 16, 19 </ b> A, 19 </ b> B, a connection end 14 having an air second inlet / outlet located on the opposite side of the detection end 12, and a detection end And an intermediate portion 13 located between the portion 12 and the connecting end portion 14.

  The hollow tube 11 has an intermediate portion 13 wound in a coil shape. The hollow tube 11 is installed in the detection end portion 12, the intermediate portion 13, and the connection end portion 14 so that the transmission of atmospheric pressure inside these portions 12 to 14 is not blocked. The detection end 12 is installed outdoors near the building. The intermediate part 13 and the connection end part 14 are installed indoors in the building. A detecting device 29 such as a micro pressure gauge, a differential pressure gauge, or a micro differential pressure gauge that detects the static pressure inside the hollow tube 11 is connected to the connection end portion 14. In addition, the detection apparatus 29 may be connected to the connection end part 14 of the hollow tube 11 (reference pressure measurement auxiliary tool 10A-10G) shown in FIGS. In the detection device 29, the reference pressure of the hollow tube 11 is continuously measured in real time.

  The hollow tube 11 (reference pressure measurement auxiliary tool 10 </ b> C) shown in FIG. 5 may be accommodated inside the housing 21. In this case, the intermediate portion 13 and the detection end portions 12 </ b> A and 12 </ b> B branched into two are accommodated in the housing 21. The hollow tube 11 (reference pressure measurement auxiliary tool 10D) illustrated in FIG. 6 may be accommodated in the housing 21. In this case, one of the two detection end portions 12 </ b> A and 12 </ b> B and the two intermediate portions 13 </ b> A and 13 </ b> B is housed in the first housing 21, and the other is housed in the second housing 21. In addition, the hollow tube 11 (reference pressure measurement auxiliary tool 10E, reference pressure measurement auxiliary tool 10D) shown in FIGS.

  The first air inlets 16, 19 </ b> A, 19 </ b> B and the second air inlet / outlet in the reference pressure measurement auxiliary tool 10 </ b> H are the same as those of the hollow tube 11 in FIG. 1 (see FIGS. 2 and 3). When the first air inlets 19A and 19B in FIG. 3 are employed, the opening areas of the inlets 19A and 19B are the same as those described in the hollow tube 11 in FIG. The length from the detection end 12 of the hollow tube 11 to the connection end 14 and the inner diameter L of the detection end 12, the intermediate portion 13, and the connection end 14 of the hollow tube 11 are the same as those of the hollow tube 11 of FIG. Identical to those described.

  In this reference pressure measurement assisting tool 10H, the atmospheric pressure in the vicinity of the detection end portion 12 provided with the first air inlet / outlet ports 16, 19A, 19B varies due to the influence of the wind blowing outdoors, and is transmitted from the inlet / outlet ports 16, 19A, 19B. Even if the atmospheric pressure changes greatly, the fluctuation in the amplitude of the static pressure inside the hollow tube 11 gradually decreases from the detection end 12 toward the connection end 14 due to the internal resistance of the hollow tube 11, and the hollow tube 11 The period of the static pressure inside 11 gradually becomes longer from the detection end 12 toward the connection end 14, and the static pressure inside the hollow tube 11 is stabilized against atmospheric pressure fluctuations due to the effect of wind blowing outdoors. Therefore, in the hollow tube 11, even if the static pressure at the detection end 12 and the intermediate portion 13 in the vicinity of the end 12 becomes unstable with respect to atmospheric pressure fluctuation, the connection end 14 and the intermediate portion in the vicinity of the end 14. The static pressure at 13 is stabilized, and a stable reference pressure is measured by a detection device 29 such as a micro pressure gauge, a differential pressure gauge, or a micro differential pressure gauge.

  The reference pressure measuring auxiliary tool 10H and the reference pressure measuring method using the auxiliary tool 10H shown in FIG. 10 are in addition to the effects of the reference pressure measuring auxiliary tool 10A and the reference pressure measuring method using the auxiliary tool 10A shown in FIG. Have the following effects. The reference pressure measurement auxiliary tool 10H and the reference pressure measurement method using the auxiliary tool 10H in FIG. 10 make the long hollow tube 11 compact by winding the intermediate portion 13 of the hollow tube 11 in a coil shape. Therefore, the hollow tube 11 can be installed at a predetermined location without taking up space. In addition, since a stable static pressure from the hollow tube 11 acts on the detection device 29, it is possible to measure a stable reference pressure in the detection device 29, and use the reference pressure measured in the detection device 29 for the control device. Various control operations can be executed accurately.

  11 and 12 are diagrams showing temporal changes in pressure (Pa) measured using these reference pressure measurement aids 10A to 10H (hollow tube 11). In these figures, the vertical axis represents pressure (Pa), and the horizontal axis represents elapsed time (seconds). In these figures, the temporal change in pressure using the hollow tube 11 is indicated by a solid line, and the temporal change in pressure not using the hollow tube 11 is indicated by a dotted line. FIG. 11 shows a temporal change in pressure (static pressure) when the length from the detection end 12 to the connection end 14 of the hollow tube 11 is 100 m, and FIG. This represents a temporal change in pressure (static pressure) when the length from the detection end 12 to the connection end 14 is 200 m.

  11 and 12, the detection end 12 (12A to 12D) is installed outdoors near the building, and the intermediate portion 13 (13A, 13B) and the connection end 14 are placed indoors. In addition to the installation, a micro differential pressure gauge (detection device 29) was installed at the connection end 14 and measured. As can be seen from FIGS. 11 and 12, when the hollow tube 11 is used, the amplitude fluctuation of the static pressure inside the hollow tube 11 is small and the period of the static pressure is smaller than when the hollow tube 11 is not used. It is getting longer. Therefore, by utilizing the hollow tube 11, the static pressure inside the hollow tube 11 can be reliably stabilized against fluctuations in the atmospheric pressure, and irregular and sudden changes in the measured reference pressure can be ensured. Can be prevented.

10A to 10H Reference pressure measurement aid 11 Hollow tube 12 Detection end 12A Detection end 12B Detection end 12C Detection end 12D Detection end 13 Intermediate portion 13A Intermediate portion 13B Intermediate portion 14 Connection end portion 15 Peripheral side surface 16 Air First inlet / outlet 17 Closed tip 18 Peripheral side surface 19A Air first inlet / outlet 19B Air first inlet / outlet 20 Inner peripheral surface 21 Housing 28 Air distribution window 29 Detection device

Claims (22)

In the reference pressure measurement aid used to measure the reference pressure of air at a predetermined location,
The reference pressure measurement auxiliary tool is formed of a long flexible hollow tube that is long in one direction, and the hollow tube includes a detection end portion having a first air inlet / outlet, and a detection end portion of the detection end portion. A connection end portion that is located on the opposite side and has a second air inlet and outlet, and an intermediate portion that is located between the detection end portion and the connection end portion;
In the reference pressure measurement auxiliary tool, the hollow tube is installed so that the transmission of atmospheric pressure is not interrupted at the detection end, the intermediate portion, and the connection end, and the pressure resistance inside the hollow tube The reference pressure measurement auxiliary tool, wherein the static pressure inside the empty tube gradually becomes stable from the detection end toward the connection end.   The reference pressure measurement aid according to claim 1, wherein an intermediate portion of the hollow tube is wound in a coil shape.   The reference pressure measurement auxiliary tool according to claim 1 or 2, wherein a detection end portion of the hollow tube is branched into at least two from the intermediate portion.   The reference pressure according to any one of claims 1 to 3, wherein the hollow tube has at least two intermediate portions branched from the connection end portion and at least two detection end portions connected to the intermediate portions. Measuring aid.   5. One of the at least two detection end portions is installed outdoors in a first direction, and the other of the detection end portions is installed in a second direction opposite to the first direction. Reference pressure measurement aid described in 1.   The detection end of the hollow tube has a closed tip and a peripheral side surface continuing from the closed tip, and the first air inlet / outlet port is formed on the peripheral side. The reference pressure measurement aid described. The air first doorway, the is plural number in the circumferential side surface, an opening area of said air first doorway, the reference pressure measuring auxiliary tool according to claim 6 which is in the range of 10 to 20 mm ^2.   A detection end portion of the hollow tube and an intermediate portion wound in a coil shape are accommodated in a breathable housing having an air flow window, and a connection end portion of the hollow tube is exposed from the housing. The reference pressure measurement aid according to any one of claims 2 to 7.   The reference pressure measurement according to any one of claims 1 to 8, wherein the reference pressure measurement auxiliary tool includes a detection device that is connected to a connection end portion of the hollow tube and detects a static pressure inside the hollow tube. Auxiliary tool.   The length from the detection end to the connection end of the hollow tube is in the range of 50 to 500 m, and the detection end, the connection end, the intermediate portion, and the inner diameter of the hollow tube are in the range of 4 to 20 mm. The reference pressure measurement auxiliary tool according to any one of claims 1 to 9.   The said hollow tube stabilizes the static pressure inside a hollow tube with respect to the atmospheric | air pressure fluctuation of this detection end part in the range of the pressure difference +/- 10-/-150Pa of the said detection end part and the said connection end part. The reference pressure measurement aid according to any one of claims 1 to 10. In a reference pressure measurement method for measuring the reference pressure of air at a predetermined location,
The reference pressure measurement method uses a long and flexible hollow tube that is long in one direction, and the hollow tube has a detection end provided with a first air inlet / outlet, and is opposite to the detection end. A connection end portion provided with an air second inlet / outlet located on the side, and an intermediate portion positioned between the detection end portion and the connection end portion,
In the reference pressure measurement method, the hollow tube is installed so that the transmission of atmospheric pressure is not interrupted at the detection end, the intermediate portion, and the connection end, and the hollow is formed by pressure resistance inside the hollow tube. A reference pressure measuring method, wherein the static pressure inside the tube is gradually stabilized from the detection end toward the connection end.   The reference pressure measuring method according to claim 12, wherein in the reference pressure measuring method, an intermediate portion of the hollow tube is wound in a coil shape.   The reference pressure measuring method according to claim 12 or 13, wherein in the reference pressure measuring method, the detection end of the hollow tube is branched into at least two from the intermediate part.   The said reference pressure measuring method WHEREIN: The said hollow tube has at least 2 intermediate | middle part which branches from a connection edge part, and at least 2 detection edge part connected to these intermediate | middle parts. Reference pressure measurement method.   In the reference pressure measuring method, one of the at least two detection end portions is installed outdoors in a first direction, and the other of the detection end portions is installed in a second direction opposite to the first direction. The reference pressure measuring method according to claim 15.   The said reference | standard pressure measuring method WHEREIN: The said detection end part has a obstruction | occlusion front-end | tip and the surrounding side surface continued from this obstruction | occlusion front-end | tip, The said 1st air inlet / outlet is formed in the said surrounding side surface. Reference pressure measurement method described in 1. The reference pressure measuring method according to claim 17, wherein in the reference pressure measuring method, a plurality of the first air inlet / outlet ports are formed on the peripheral side surface, and an opening area of the first air inlet / outlet port is in a range of 10 to 20 mm ² .   In the reference pressure measuring method, the detection end portion of the hollow tube and the intermediate portion wound in a coil shape are accommodated in a breathable casing having an air inflow window, and the connection end portion of the hollow tube is The reference pressure measuring method according to any one of claims 12 to 18, which is exposed from the casing.   The reference pressure measurement according to any one of claims 12 to 19, wherein in the reference pressure measurement method, a detection device for detecting a static pressure inside the hollow tube is connected to a connection end of the hollow tube. Method.   In the reference pressure measurement method, the length from the detection end to the connection end of the hollow tube is in the range of 50 to 500 m, and the detection end, the connection end, the intermediate portion, and the inner diameter of the hollow tube are The reference pressure measuring method according to any one of claims 12 to 20, which is in a range of 4 to 20 mm.   The said hollow tube stabilizes the static pressure inside a hollow tube with respect to the atmospheric | air pressure fluctuation of this detection end part in the range of the pressure difference +/- 10-/-150Pa of the said detection end part and the said connection end part. The reference pressure measuring method according to any one of claims 12 to 21.

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