JP6591325B2 - Auxiliary water level gauge auxiliary system, its auxiliary method, its auxiliary program and auxiliary water level gauge with auxiliary functions - Google Patents

Description

  The present embodiment relates to an auxiliary technique for improving the convenience or measurement accuracy of the throwing water level gauge.

  In facilities that have become difficult to enter, such as nuclear power plants damaged by tsunamis and earthquakes, it is sometimes required to measure the water level of the liquid inside. As a conventionally known water level meter, there is a bubble type water level meter that calculates a water level by measuring a pressure required to send bubbles to the bottom of the water with a bubbler tube having an open end arranged at the bottom of the water.

  The bubble-type water level meter is a water level meter that obtains a water level by slowly discharging bubbles from a tube opened to a liquid and measuring the pressure in the tube at that time. Since the pressure in the pipe is equal to the sum of the atmospheric pressure and the water pressure applied to the open end of the pipe, the water level can be obtained by subtracting the atmospheric pressure from the pressure at the open end.

However, the bubble type water level meter requires an air supply source for sending bubbles to the bottom of the water, and the apparatus becomes large. In addition, installation work for fixing the device in the vicinity of the liquid is required.
One type of water level gauge that does not require such installation work is the throw-in type water level gauge. Further, the throw-in type water level gauge is smaller in apparatus and easier to operate than the bubble type water level gauge. This throwing water level gauge is widely used in general industries to measure water levels in river monitoring programs and water and sewage systems.

By the way, the water level indicated by the throwing water level gauge may deviate from the true water level due to several factors.
For example, in a water level meter that derives a water level based on water pressure, if the density of the liquid is higher than a specific gravity 1 depending on the type of liquid stored, the water level is displayed as deeper than the actual level.
Further, there may be a difference between the electrical signal relating to the water level sent to the display unit and the indicated value of the water level due to the mechanical shift of the meter built in the display unit.
Therefore, in order to improve the accuracy of the indicated value of the water level calculated by the throw-in type water level meter, it is necessary to calibrate or correct each deviation factor.

The request for accuracy of the indicated value of the water level is required even when the above-mentioned workers cannot enter the site. Currently, research is being conducted on water level gauges that can obtain accurate water levels even when remotely corrected.
In addition, when the worker cannot enter the site, it is desired to acquire information on the stored liquid other than the water level as much as possible with one throwing water level gauge.

Japanese Patent Application Laid-Open No. 07-054394 JP 2000-337945 A No. 03-2821

In order to acquire information other than the water level related to the stored liquid mentioned above or to correct the information related to the acquired water level, an auxiliary meter that independently measures the water pressure is thrown with the detector separately from the detector of the throwing water level meter. There is.
By combining the water pressure measured by the auxiliary meter with the water pressure detected by the detector, it is possible to acquire a physical quantity other than the water level of the stored liquid, correct information related to the water level, and the like.
In some cases, this auxiliary instrument is provided with a plurality of auxiliary instruments of the same type or different types from the viewpoint of redundancy.

However, if the detector is designed to be placed vertically in the liquid and the detector is tilted, each auxiliary instrument that should show the same water pressure will have a different measured water pressure. I will show you.
For example, the pressure sensor included in the detector and the detection end surfaces of the two auxiliary meters may be aligned, and the water pressure that is the same as the water pressure received by the pressure sensor may be acquired by the auxiliary meter.
In this case, when the detector is disposed at an inclination, the water depths of the two detection end faces and the pressure sensor are different from each other.

Therefore, if the measured water pressure received by these detection end faces, which does not represent the water pressure received by the pressure sensor, is used as it is for the adjustment of the throw-in water level gauge, the accuracy of the adjustment decreases.
Moreover, also when deriving physical quantities, such as the density of stored liquid, using such a measured water pressure, the accuracy of the derived physical quantities decreases.

  The embodiment of the present invention has been made in view of such circumstances, and even when a detector to which an auxiliary instrument is fixed is inclined in the liquid, an appropriate water pressure can be obtained. It aims at providing the auxiliary | assistant system of a built-in type water level meter, its auxiliary | assistant method, its auxiliary | assistant program, and the throw-in type water level meter with an auxiliary function.

  The auxiliary system of the throwing-type water level meter according to the present embodiment is an outer surface of the detector in the auxiliary system of the throwing-type water level meter provided with a detector that detects the water pressure by being thrown into the stored liquid. Two or more auxiliary instruments that are fixed at the same water depth when the detector is arranged vertically, and a measured water pressure measured by the auxiliary instrument based on the arrangement shape on the outer surface of the auxiliary instrument And a calculation unit for calculating a representative value linearly combined using the.

  The auxiliary method of the throwing-type water level meter according to the present embodiment is the outer surface of the detector in the auxiliary method of the throwing-type water level meter provided with a detector that is thrown into the stored liquid and detects the water pressure. A step of measuring water pressure with two or more auxiliary instruments fixed at the same water depth when the detector is arranged vertically, and a measured water pressure measured by the auxiliary instrument respectively outside the auxiliary instrument. Calculating a linearly coupled representative value using a coefficient based on an arrangement shape on the surface.

  The auxiliary program for the throwing water level meter according to the present embodiment is the auxiliary program for the throwing water level meter provided with a detector that is thrown into the stored liquid and detects the water pressure. The step of measuring the water pressure with two or more auxiliary instruments fixed at the same water depth when the detector is arranged vertically, the measured water pressure measured by the auxiliary instrument, respectively. A step of calculating a representative value linearly coupled using a coefficient based on the arrangement shape on the outer surface.

  INDUSTRIAL APPLICABILITY According to the present invention, even when a detector to which an auxiliary meter is fixed is inclined and disposed in the liquid, an auxiliary system for an input water level meter that can acquire an appropriate water pressure, its auxiliary method, and its auxiliary program And an input water level gauge with an auxiliary function.

The schematic block diagram of the throwing-in type water level meter with an auxiliary function concerning 1st Embodiment. The schematic sectional drawing of the detector with which an injection type water level gauge is provided. The figure which shows the relationship between the water pressure which a water pressure side diaphragm receives, the differential pressure | voltage of the atmospheric pressure which a reference pressure side diaphragm receives, and the indication value of a water level. The figure which shows the arrangement | positioning shape on the coordinate of the measurement point and center point of the auxiliary system concerning 1st Embodiment. The figure which shows the arrangement | positioning shape on the coordinate of the measurement point and center point of the auxiliary system concerning 2nd Embodiment. The schematic block diagram of the throwing-in type water level meter with an auxiliary function concerning 3rd Embodiment. The figure which shows the calculation method of the representative value of the measured water pressure in 3rd Embodiment. The schematic block diagram of the throwing-in type water level meter with an auxiliary function concerning 4th Embodiment. The figure which shows the arrangement | positioning shape of the detector of the throw-in type water level meter with an auxiliary function concerning 4th Embodiment, and an auxiliary meter. The figure which shows arrangement | positioning shapes, such as a measurement point, when a detector is inclined and arrange | positioned from the perpendicular direction.

Hereinafter, embodiments of the present embodiment will be described with reference to the accompanying drawings.
[Pitching water level gauge 20]
First, the throw-in type water level meter 20 to which the auxiliary system 10 is applied will be described with reference to FIGS. 1 and 2.
FIG. 1 is a schematic configuration diagram of an input-type water level meter 100 with an auxiliary function according to the first embodiment.
The throwing water level meter 100 with an auxiliary function includes a throwing water level meter 20 and an auxiliary system 10.

As shown in FIG. 1, the throw-in type water level gauge 20 has a detector 24 that is thrown into the stored liquid connected to the converter 32 via a signal line 38.
The conversion unit 32 is connected to the display unit 26 inside the central control room, for example.
The conversion unit 32 performs I / V conversion on the current signal related to the water level of the stored liquid received from the detector 24 and transmits it to the display unit 26.

FIG. 2 is a schematic cross-sectional view of the detector 24 provided in the throwing water level gauge 20.
As shown in FIG. 2, the detector 24 has a cylindrical outer shape by a casing 21 having a water inlet hole on one bottom surface.
Inside the housing 21, a pressure sensor 22 is installed in the vicinity of the bottom surface provided with the water inlet hole so as to seal the housing 21.
The inside of the housing 21 is isolated from the surrounding stored liquid by the pressure sensor 22, and the stored liquid does not enter further from the pressure sensor 22.

On the other hand, a hollow cable 23 is connected to the other bottom surface where no water inlet hole is provided. The hollow cable 23 is normally open to the atmosphere at the other end to which the casing 21 is not connected, and maintains the inside of the casing 21 at the atmospheric pressure _Patm . One surface of the pressure sensor 22 facing the inside of the sealed casing 21 receives the atmospheric pressure _Patm via the hollow cable 23. The detector 24 includes a transmission line 29 including the hollow cable 23.

The other surface in contact with the stored liquid out of the pressure sensor 22 (pressure detecting end surface) is subjected to pressure P _w.
As the pressure sensor 22, for example, a sensor using a diaphragm 25 that converts the pressure applied to the diaphragm into the magnitude of an electric signal is widely used.
Hydraulically P _w water pressure side diaphragm 25a is subjected comprise a pressure sensor 22, differential pressure ΔP between the atmospheric pressure P _atm to the reference pressure side diaphragm 25b is subjected via a hollow cable 23 is read and is converted to a voltage in the differential unit 35 .

This voltage is converted into a current signal by the V / I conversion circuit 37 and output to the signal line 38. The signal line 38 is covered with the covering material 28 together with the hollow cable 23 and the reinforcing wire 18, and is connected to the conversion unit 32 (FIG. 1).
The conversion unit 32 performs I / V conversion on the current signal received from the detector 24 via the signal line 38 and transmits it to the display unit 26 (FIG. 1).

Here, FIG. 3 is a diagram showing the relationship between the differential pressure ΔP between the water pressure P _w received by the water pressure side diaphragm 25a and the atmospheric pressure P _atm received by the reference pressure side diaphragm 25b, and the indicated value of the water level.
As shown in FIG. 3, the display unit 26 displays this signal based on the differential pressure ΔP as the acquired water level.
The auxiliary system 10 according to the embodiment, for example, calibrates the indicated value of the water level derived based on such a principle, or acquires secondary information other than the water level such as the concentration and temperature of the stored liquid. A total of 20 is assisted.

First Embodiment [Auxiliary System 10]
As shown in FIG. 1, the auxiliary system 10 is connected to auxiliary instruments 50 _n (50 ₁ , 50 ₂ ).
Each auxiliary instrument 50 _n measures the back pressure by applying pressure to the bubbler tube 51 _n (submerged member 51 _n ) and the bubbler tube 51 _n (51 ₁ , 51 ₂ ) made of, for example, silicon or metal. And a measurement unit 53 _n (first measurement unit 53 ₁ , second measurement unit 53 ₂ ).
The two bubbler tubes 51 _n are fixed by the jig 19 at positions where the opening ends 27 are at the same water depth on the outer surface of the detector 24.

Therefore, when the detector 24 is arranged vertically without tilting in the liquid, the two bubbler tubes 51 receive the same water pressure as the water pressure applied to the water pressure side diaphragm 25a.
That is, the water pressure received by the two measurement points 33 measured by the auxiliary meter 50 _n at the position of the opening end 27 of the bubbler tube 51 _n and the center point 34 of the hydraulic side diaphragm 25a is the same.

Here, FIG. 4 is a diagram illustrating an arrangement shape on the coordinates of the measurement point 33 and the center point 34 of the auxiliary system 10 according to the first embodiment.
That is, FIG. 4 shows an arrangement shape when the detector 24 is viewed from the hydraulic diaphragm 25a side.
The two measurement points 33 are arranged at coordinates A (x ₁ , y ₁ ) and coordinates B (x ₂ , y ₂ ), and the center point 34 is arranged at coordinates O (X, Y).
In the first embodiment, the open ends 27 (measurement points 33) of the two bubbler tubes 51 and the center point 34 of the hydraulic side diaphragm 25a of the detector 24 are arranged on a straight line.

The bubbler tube 51 _n (51 ₁ , 51 ₂ ) with the open end 27 fixed in this way is pulled to the ground (FIG. 1).
Then, the free end of Baburachubu 51 which opens to the atmosphere is connected to the measuring unit 53 _n, respectively corresponding.

The measuring unit 53 _n obtains the water pressure P _s (P _s1 , P _s2 ) at the measurement point 33 by measuring the back pressure that is applied from the connected bubbler tube 51 _n and receiving the pressure.
These measurement units 53 _n are all connected to the calculation unit 41.
The measured water pressure (measured water pressure P _s ) P _s (P _s1 , P _s2 ) is converted into an electric signal and transmitted to the calculation unit 41.

Further, the two measuring units 53 _n are connected via the calculating unit 41.
The calculation unit 41 calculates the representative value P by linearly combining the measured water pressures P _s (P _s1 , P _s2 ) using a coefficient based on the arrangement shape of the opening end 27 of the bubbler tube 51.
In the first embodiment, the calculation unit 41 sets the average of the measured water pressures P _s (P _s1 , P _s2 ) measured by the auxiliary meter 50 _n as the representative value P.

As described above, when the detector 24 is arranged vertically without tilting in the liquid, the first measuring unit 53 _n and the second measuring unit 53 _n measure the same water pressure.
However, when the detector 24 is disposed so as to be inclined such as being in contact with the water bottom, the water depths of the two open ends 27 of the bubbler tube 51 _n do not match.
Therefore, the measured water pressures P _s1 and P _s2 measured by the first measuring unit 53 _n and the second measuring unit 53 _n are not matched.

If only one of the two measured water pressures P _s1 and P _s2 that do not match is regarded as the water pressure P _w received by the water pressure side diaphragm 25a and used for the adjustment of the pouring water level gauge 20, the accuracy of the adjustment is reduced.
Therefore, when the measured water pressure P _s measured by the first measuring unit 53 _n and the second measuring unit 53 _n is different, it is estimated that the detector 24 is disposed inclined from the vertical direction. The measured water pressures P _s1 and P _s2 are averaged.

The average of the measured water pressure P _s (P _s1 , P _s2 ) is appropriate as the representative value P for the following reason.
As shown in FIG. 4, when the three points of the open end 27 of the bubbler tube 51 and the central point 34 of the hydraulic side diaphragm 25a are arranged in a straight line, the central point 34 of the hydraulic side diaphragm 25a has two measurements. It becomes the midpoint of point 33.
Therefore, the position vector of the coordinate O is expressed by the following expression (1), and the following expression (2) is established from the y component of the coordinate O.

ただし、ｉ（ｉ＝１，２）は、各測定点３３を示すサフィックスである。
よって、式（２）および式（３）から次式（４）の関係式が導かれる。

すなわち、測定水圧Ｐ_sの代表値Ｐを２つの測定水圧Ｐ_s1，Ｐ_s2の平均とすることで、代表値Ｐを水圧側ダイヤフラム２５ａの中心点３４が受ける水圧を表すものとすることができる。 Assuming that the undetermined proportionality constant of the stored liquid is m, the water depth at the measurement point 33 is y _i , and the water depth at the center point 34 is Y, the relationship between the water depth y _{i at the} measurement point 33 and the measured water pressure P _si and the center point 34 The relationship between the water depth Y and the water pressure P _s can be expressed by the following equation (3).

However, i (i = 1, 2) is a suffix indicating each measurement point 33.
Therefore, the relational expression of the following expression (4) is derived from the expressions (2) and (3).

In other words, the representative value P of the measured water pressure P _s is an average of the two measured water pressures P _s1 and P _s2 , so that the representative value P can represent the water pressure received by the center point 34 of the water pressure side diaphragm 25a. .

Returning to FIG. 1, the description will be continued.
The adjusting unit 42 adjusts the throwing water level gauge 20 using the calculated representative value P of the measured water pressure.
There are various types of adjusting units 42 that adjust the throwing water level gauge 20 with the representative value P of the measured water pressure.
For example, the adjustment unit 42 performs zero point calibration of the throwing water level gauge 20 using the representative value P of the measured water pressure.
The zero point calibration is to calibrate so that the indicated value of the water level indicates zero when the pressures received by the water pressure side diaphragm 25a and the reference pressure side diaphragm 25b coincide.

When performing zero point calibration, as shown in FIG. 1, the adjustment unit 42 is connected to a calibration unit 43 connected to the conversion unit 32 and an application unit 44 connected to the hollow cable 23 opened to the atmosphere.
Then, the adjustment unit 42 instructs the application unit 44 to cause the application unit 44 to apply a pressure corresponding to the representative value P of the measured water pressure P _s to the hollow cable 23.

The applied pressure is applied from the hollow cable 23 to the inside of the casing 21 of the detector 24 and applied to the reference pressure side diaphragm 25b.
Since the representative value P corresponds to the water pressure P _w according to the water pressure side diaphragm 25a, a hydraulic water pressure side diaphragm 25a receives the pressure reference pressure side diaphragm 25b is subjected should coincide.

Therefore, since the differential pressure ΔP read by the difference unit 35 at this time becomes zero, if the calibration unit 43 calibrates so that the water level displayed on the display unit 26 at this time becomes zero, the detector 24 is not lifted. , Zero point calibration of the water level indication value can be performed.
As described above, the indicated value of the water level of the throw-in type water level gauge 20 deviates from the true water level due to a number of factors.
Therefore, the adjustment unit 42 is not limited to the above-described example as long as the adjustment type water level meter 20 is adjusted using the representative value P of the measured water pressure of the auxiliary meter 50 _n .

The calculating unit 41 is also connected to a deriving unit 49 that derives a physical quantity related to the stored liquid other than the water level using the representative value P of the measured water pressure.
For example, by fixing two bubbler tubes 51 _n so that the depths of the hydraulic side diaphragm 25a and the opening end 27 thereof are different from each other, the representative value P represents a water pressure at a water depth different from that of the hydraulic side diaphragm 25a. Become.

For example, the deriving unit 49 derives the density of the stored liquid from the difference between the representative value P and the water pressure P _w detected by the detector 24.
Furthermore, the derivation unit 49 can also estimate the component of the stored liquid based on this density.
The adjusting unit 42 described above may be connected to the deriving unit 49 and adjust the throwing water level meter 20 using the physical quantity derived by the deriving unit 49.

The above calculation method may be executed by a computer in accordance with a program.
For example, the calculation unit 41, the derivation unit 49, the calibration unit 43, and the adjustment unit 42 include a processor such as a CPU, a storage device such as a ROM (Read Only Memory), a RAM (Random Access Memory), or an HDD (Hard Disk Drive), It can comprise as a computer which comprises.

In this case, among the units shown in FIG. 1, the functions of the calculation unit 41, the derivation unit 49, the calibration unit 43, and the adjustment unit 42 can be realized by the processor executing a predetermined program stored in the storage device. it can.
Further, in place of such software processing, it can be realized by hardware such as an application specific integration circuit (ASIC) or a field-programmable gate array (FPGA).
Further, these can be realized by combining software processing and hardware processing.

As described above, according to the auxiliary system 10 according to the first embodiment, even when the detector 24 to which the auxiliary instrument 50 _n is fixed is inclined in the liquid, the representative representative of the appropriate measured water pressure P _s . The value P can be obtained.
Further, by using this representative value P, it is possible to acquire highly accurate calibration or highly accurate information regarding the stored liquid.

(Second Embodiment)
FIG. 5 is a diagram illustrating an arrangement shape on the coordinates of the measurement point and the center point of the auxiliary system 10 according to the second embodiment.
The auxiliary system 10 according to the second embodiment is fixed to the outer surface of the detector 24 so that the three bubbler tubes 51 _n (51 ₁ , 51 ₂ , 51 ₃ ) have the same water depth. As shown in FIG. 5, three measurement points 33 are arranged.

なお、α，β，γは、３つの測定点３３（図５中Ａ，Ｂ，Ｃ）を通る円の既知の中心角であって、順に三角形の頂点Ａ、Ｂ、Ｃに対応する中心角を表す。 If the coordinates of the center point 34 are O, and the coordinates of the three measurement points 33 are A, B, and C, respectively, the position vector of O is expressed by the following equation (5).

Α, β, and γ are known center angles of a circle passing through the three measurement points 33 (A, B, and C in FIG. 5), and the center angles corresponding to the vertices A, B, and C of the triangle in order. Represents.

よって、前述の式（６）および式（３）から、次式（７）を算出することができる。

第２実施形態において、計算部４１は、式（７）を用いて、測定水圧Ｐ_sの代表値Ｐを計算する。 Therefore, the water depth Y of the center point 34 is expressed by the following equation (6) using the water depths (y ₁ , y ₂ , y ₃ ) of the _three measurement points 33.

Therefore, the following equation (7) can be calculated from the above equations (6) and (3).

In the second embodiment, the calculation unit 41 calculates the representative value P of the measured water pressure P _s using Expression (7).

Even if the Baburachubu 51 is fixed four or more different positions, the pressure P _w of the center point 34 from the equation (7) the position of the opening end 27 of any three Baburachubu 51 as the measuring point 33 The representative value P to be expressed can be obtained.
Further, for example, when there are six fixed bubbler tubes 51, representative values calculated using the first to third measurement points 33 and representative values calculated using the fourth to sixth measurement points 33. By averaging the values to obtain the true representative value P, the accuracy of the representative value can be increased.

According to the second embodiment, when the measured water pressure P _s which is measured at the measuring point 33 is three or more, it is possible to calculate the representative value P representative of the pressure P _w of the center point 34 with high precision it can.
Further, even when any two measurement points 33 are not on a straight line passing through the center point 34, an appropriate representative value P can be calculated.

Since the second embodiment has the same structure and operation procedure as the first embodiment except that the calculation unit 41 calculates the representative value P of the measured water pressure P _s based on the equation (7), a duplicate description is given. Is omitted.
Also in the drawings, portions having a common configuration or function are denoted by the same reference numerals, and redundant description is omitted.

Thus, according to the auxiliary system 10 according to the second embodiment, in addition to the effects of the first embodiment, the center point 34 receives by using the auxiliary meter 50 _n arranged with an arbitrary center angle. a representative value P corresponding to the pressure P _w can be computed with high accuracy.

(Third embodiment)
FIG. 6 is a schematic configuration diagram of an input-type water level meter 100 with an auxiliary function according to the third embodiment.
Moreover, FIG. 7 is a figure which shows the calculation method of the representative value of the measured water pressure in 3rd Embodiment.
As shown in FIGS. 6 and 7, the auxiliary system 10 according to the third embodiment includes a data holding unit that holds a difference ΔP _s between the already obtained water pressures P _s and a correction amount M corresponding to the difference ΔP _s. 48 (denoted as “simulation result holding unit 48” in FIGS. 6 and 7).

For example, when there are many error factors that must be taken into account, it is more accurate to obtain the representative value P using an actual measurement value or a simulation result measured in advance than to calculate by applying a specific calculation formula. In some cases.
Therefore, in the third embodiment, the relationship between the difference ΔP _s of the measured water pressure P _s obtained from actual measurement values and the correction amount M is used.

In the data holding unit 48, the relationship between the difference ΔP _s of the measured water pressure P _s and the correction amount M corresponding to the difference ΔP _s is associated with a simulation or actual measurement performed in advance using CAD.
The calculation unit 41 refers to the data holding unit 48 to acquire the correction amount M based on the measured difference ΔP _{s between} the measured water pressures P _s and derive the representative value P.

For example, as shown in FIG. 7, consider a case where the difference ΔP _s between the two actual measurement values P _s1 and P _s2 of the auxiliary meter A is 13.16.
The calculation unit 41 refers to the data in the data holding unit 48 and acquires the correction amount M3.42 when the difference ΔP _s is 13.16.
Then, the calculation unit 41 derives a representative value P = 563.5 by subtracting M (3.42) from P _s1 (563.5) having a large numerical value among the actual measurement values P _s1 and P _s2 .
Note that the measured water pressure P _s , the correction amount M, and the difference ΔP _s thereof held in the data holding unit 48 may be converted into the depth of the auxiliary meter 50 _n and held.

Incidentally, except that to obtain a representative value P with a vested relationship between the difference [Delta] P _s of the measurement pressure P _s and the correction amount M, since the third embodiment is the same structure and operation procedure of the second embodiment The duplicated explanation is omitted.
Also in the drawings, portions having a common configuration or function are denoted by the same reference numerals, and redundant description is omitted.

  As described above, according to the auxiliary system 10 according to the third embodiment, in addition to the effects of the first embodiment, an accurate representative value P including an error factor actually occurring can be acquired.

(Fourth embodiment)
FIG. 8 is a schematic configuration diagram of an insertion type water level meter 100 with an auxiliary function according to the fourth embodiment.
FIG. 9 is a diagram showing an arrangement shape of the detector 24 and the auxiliary meter 50 _n of the throw-in type water level meter 100 with an auxiliary function according to the fourth embodiment.

In the auxiliary system 10 according to the fourth embodiment, as shown in FIG. 8 and FIG. 9, the auxiliary meter 50 _{n includes} two groups 47.
The auxiliary meters 50 _n belonging to the respective groups 47 (47a, 47b) are fixed at the same water depth on the outer surface of the detector 24.
Then, the auxiliary system 10 determines the measurement point 33f (hereinafter, “second group measurement point 33f”) of the other group 47 based on the water depth of the measurement point 33e (hereinafter, “first group measurement point 33e”) of one group 47. The other group calculation unit 46 that calculates the water depth of “)” is provided.

  When the detector 24 is arranged vertically, the water depth difference F between the center point 34 and the first group measurement point 33e is independent of the horizontal distance d between the first group measurement point 33e and the second group measurement point 33. The vertical distance D along the detector 24 between the first group measurement point 33e and the second group measurement point 33f.

なお、ｌは中心点３４と測定点３３と水平距離を表す。
よって、他群算出部４６は、第１実施形態などで計算される中心点３４の水圧Ｐ_wに相当する代表値Ｐを用いて、第２群測定点３３ｆが測定する測定水圧Ｐ_soまたはその代表値Ｐを推定する。 FIG. 10 is a diagram showing an arrangement shape of measurement points 33 (33e, 33f) and the like when the detector 24 is arranged with a known inclination θ from the vertical direction.
When the detector 24 is tilted, the water depth difference F is expressed by the following equation (8) as shown in FIG.

Note that l represents the horizontal distance between the center point 34 and the measurement point 33.
Therefore, the other group calculation unit 46 uses the representative value P corresponding to the water pressure P _w at the center point 34 calculated in the first embodiment or the like, and the measured water pressure P _so measured by the second group measurement point 33f or its The representative value P is estimated.

Since the fourth embodiment has the same structure and operation procedure as those of the second embodiment except that the water depth and the like of the other auxiliary meters 50 _n of different groups are corrected from the measured water pressure P _s , overlapping description will be given. Omitted.
Also in the drawings, portions having a common configuration or function are denoted by the same reference numerals, and redundant description is omitted.

As described above, according to the auxiliary system 10 according to the fourth embodiment, in addition to the effects of the first embodiment, the measurement water pressure at the measurement point 33e of one auxiliary meter 50 _{n having} a different fixed position in the detector 24 is used. The water depth of the measurement point 33f of the other auxiliary meter 50 _n can be estimated.
Furthermore, from this water depth, the measured water pressure P _so measured by the auxiliary instrument 50 _n of the other group can be estimated.

According to the auxiliary system 10 of at least one embodiment described above, the auxiliary instrument 50 _n is fixed by calculating the representative value P from a plurality of measured water pressures P _s based on the arrangement shape of the measurement points 33. Even when the detected detector 24 is disposed to be inclined in the liquid, an appropriate representative value P of the measured water pressure P _s can be acquired.

Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention.
These embodiments can be implemented in various other forms, and various omissions, replacements, changes, and combinations can be made without departing from the scope of the invention.
These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Auxiliary system, 18 ... Reinforcement line, 19 ... Jig, 20 ... Throw-in type water level meter, 21 ... Housing, 22 ... Pressure sensor, 23 ... Hollow cable, 24 ... Detector, 25 ... Diaphragm, 25a ... Water pressure Side diaphragm, 25b ... reference pressure side diaphragm, 26 ... display section, 27 ... open end, 28 ... covering material, 29 ... wire, 32 ... conversion section, 33 (33e, 33f) ... measurement point (first group measurement point, (Second group measurement point), 34 ... center point, 35 ... difference unit, 37 ... V / I conversion circuit, 38 ... signal line, 41 ... calculation unit, 42 ... adjustment unit, 43 ... calibration unit, 44 ... application unit, 46 ... other group calculator, 47 ... group, 48 ... data holding unit (simulation result holding section), 49 ... deriving unit, 50 _n ... auxiliary instrument, 51 _n ... Baburachubu, 51 _n ... flooded member, 53 _n ... measurement Unit (first measurement unit, second measurement unit) 100 ... auxiliary function Can Tokomishiki level gauge, 53 ₁ ... first measurement unit, 53 ₂ ... second measurement unit, D ... vertical distance, F ... depth difference, M ... correction amount, P ... representative value, P _atm ... atmospheric pressure, P _s (P _s1, P _s2 ) ... measured water pressure, P _so ... other group measured water pressure, P _w ... center O water pressure, d ... horizontal distance, ΔP _s ... measured water pressure difference, θ ... detector inclination.

Claims (11)

In the auxiliary system of the throwing water level meter equipped with a detector that detects the water pressure by being thrown into the stored liquid,
Two or more auxiliary instruments that are fixed at the same water depth when the detector is arranged vertically on the outer surface of the detector;
A calculation unit that calculates a representative value obtained by linearly combining the measured water pressures measured by the auxiliary meters using a coefficient based on the arrangement shape on the outer surface of the auxiliary meter. Auxiliary system. The auxiliary system of the throwing-type water level meter according to claim 1, further comprising an adjustment unit that adjusts the throwing-type water level meter using the representative value. The auxiliary system of the throwing water level meter according to claim 1 or 2, further comprising a derivation unit that derives a physical quantity related to the stored liquid other than the water level using the representative value and the water pressure detected by the detector. . In the case where there are two auxiliary meters, and the measurement points at which the two auxiliary meters detect the measured water pressure and the center point on the water pressure detection surface of the detector are arranged in a straight line, the calculation unit The auxiliary system of the throwing water level meter according to any one of claims 1 to 3, wherein the representative value is an average of water pressure measured by the auxiliary meter. When there are three auxiliary instruments, the calculation unit calculates the representative value, Psi ( i = 1, 2, 3) as the measurement water pressure, α, β, and γ as the measurement points of the three auxiliary instruments. central angle of a circle passing through, as the pressure of the heart in the circle P

The auxiliary system of the throwing-type water level meter according to claim 1 or 4, which calculates based on a relational expression represented by: If the previous SL auxiliary instrument is 4 or more, the auxiliary system Tokomishiki level meter according to claim 5 for applying the relationship for any three auxiliary instruments of these in the calculation of the representative value. A data holding unit that holds a difference between two or more water pressures and an acquired correction amount corresponding to the difference in association with each other;
The auxiliary system of the throwing water level meter according to any one of claims 1 to 6, wherein the calculation unit obtains the correction amount based on a difference between the measured water pressures and derives the representative value. The said auxiliary meter is divided into two or more groups, The other group calculation part which calculates the water depth of the measurement point of another group based on the water depth of the measurement point of one group and the inclination of the said detector is provided. Submersible water level meter auxiliary system. The throwing-type water level meter with an auxiliary | assistant function provided with the auxiliary | assistant system of the throwing-type water level meter of any one of Claims 1-8. In the auxiliary method of the throwing water level meter equipped with a detector that detects the water pressure by being thrown into the stored liquid,
Measuring the water pressure with two or more auxiliary instruments that are fixed at the same depth when the detector is arranged vertically on the outer surface of the detector;
Calculating a representative value obtained by linearly combining the measured water pressures measured by the auxiliary meters using a coefficient based on the arrangement shape on the outer surface of the auxiliary meter. Auxiliary method. In the auxiliary program of the throwing water level meter equipped with a detector that detects the water pressure by being thrown into the stored liquid,
On the computer,
A step of measuring the water pressure with two or more auxiliary instruments fixed at the same depth when the detector is arranged vertically on the outer surface of the detector, and the measurement measured by the auxiliary instrument And a step of calculating a representative value obtained by linearly combining water pressure using a coefficient based on an arrangement shape of the auxiliary meter on the outer surface of the auxiliary meter.

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