JP2017138190A - Water-level measurement device, method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To highly accurately measure water-level in a manhole in a water-level measurement device, method and program.SOLUTION: A water-level measurement device includes an information processing device which acquires water-level information from a water-level sensor for detecting water-level in a manhole. The information processing device has a processor which corrects the water-level detected by the water-level sensor by referring to data base of water temperature in a region where the manhole is provided and taking into consideration the specific gravity of water depending on the water temperature.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water level measurement device, method, and program.

  In recent years, with the frequent occurrence of guerrilla heavy rain, for example, a large amount of rainwater exceeding the expected amount flows into the sewer pipe, and inundation damage caused by inundation (inland water inundation) has increased. However, since most of the sewers constituting the sewer are buried under the road, it is difficult to directly monitor the water level inside the manhole from outside the manhole.

  Therefore, a technique has been proposed in which a water level sensor is installed inside the manhole to detect signs of flooding. For example, a monitoring system that wirelessly transmits a measurement value of a water level sensor in a manhole to an information management server has been proposed (see, for example, Patent Documents 1 and 2). However, the measurement value of the water level sensor changes under the influence of environmental changes such as the water temperature, so the measurement accuracy of the water level is also affected by the environmental change.

JP2015-12431A JP 2002-54167 A JP 7-324964 A Japanese Patent Laid-Open No. 11-37825

Chemical handbook Basic bias (5th revised edition, 2 volumes in total), The Chemical Society of Japan, edited by Maruzen Publishing, February 2004

  Conventional water level measurement is affected by environmental changes such as water temperature, so it is difficult to measure the water level in the manhole with high accuracy.

  Therefore, an object of one aspect is to provide a water level measuring device, method, and program capable of measuring the water level in a manhole with high accuracy.

  According to one proposal, an information processing device that acquires water level information from a water level sensor that detects a water level in a manhole is provided, the information processing device refers to a database of water temperature in a region where the manhole is provided, A water level measuring device having a processor that corrects the water level detected by the water level sensor in consideration of the specific gravity of water depending on the water temperature is provided.

  According to one aspect, the water level in the manhole can be measured with high accuracy.

It is a figure which shows an example of the water level measuring apparatus in one Example. It is a block diagram which shows an example of a structure of a detection apparatus. It is a figure explaining an example of the relationship between water temperature and specific gravity of water. It is a block diagram which shows an example of a structure of the data center in one Example. It is a flowchart explaining an example of the process of the data center in 1st Example. It is a figure explaining the relationship between a water level sensor output and a pressure. It is a figure which shows an example of the fitting result of a water level sensor output and a water level. It is a figure which shows an example of the shipping temperature characteristic of a water level sensor. It is a figure which shows an example of the fitting parameter of a water level sensor. It is a figure which shows an example of the error after the temperature correction in a water level sensor. It is a flowchart explaining an example of the process of the data center in 2nd Example. It is a figure explaining an example of a 1-year change of the water temperature of a water purification plant. It is a flowchart explaining an example of the process of the data center in 3rd Example.

  The disclosed water level measurement device, method and program obtain water level information from a water level sensor that detects the water level in the manhole, refer to the water temperature database in the area where the manhole is located, and determine the specific gravity of the water depending on the water temperature. The water level detected by the water level sensor is corrected in consideration.

  Hereinafter, embodiments of the disclosed water level measurement device, method, and program will be described with reference to the drawings.

  FIG. 1 is a diagram illustrating an example of a water level measuring apparatus according to an embodiment. A water level measurement device 10 illustrated in FIG. 1 includes a plurality of detection devices 23 (only two units are illustrated in FIG. 1) and a data center 41 that is an example of an information processing device. Each detection device 23 is provided in a manhole 21 covered with a manhole cover 22.

  FIG. 2 is a block diagram illustrating an example of the configuration of the detection device. The detection device 23 illustrated in FIG. 2 includes a waterproof housing 231, an antenna 232, and a water level sensor 233. In the waterproof housing 231, a control device 235, a power source 236, and a wireless transmission device 237 are housed. The control device 235 can be formed by, for example, an MCU (Micro-Controller Unit). In this example, the power source 236 is formed of a battery that supplies power to the control device 235 and the wireless transmission device 237.

  The water level sensor 233 detects the water level of the water flowing through the sewer 24 below the manhole 21 by a well-known method, and outputs information (or data) indicating the water level. In this example, as shown in FIG. 1, at least a part of the water level sensor 233 is disposed below the water surface indicated by a broken line of water flowing through the sewer 24. Further, the water level sensor 233 outputs a current value representing the detected water pressure, and the data center 41 converts this current value into a water level as will be described later. The wireless transmission device 237 transmits the current value output from the water level sensor 233 via the antenna 232 under the control of the control device 235.

  The wireless transmission device 237 transmits a current value by short-range wireless communication, for example. The gateway (GW: Gate Way) 31 supplies the current value received from the detection device 23 to the data center 41 via the network 32 by, for example, wide area wireless communication. Each detection device 23 transmits a current value under the control of its own control device 235, for example, periodically or at a preset timing. The timing at which each detection device 23 transmits the current value may be variably set, for example, may be set by the data center 41.

  The temperature management center 51 includes a temperature management device 52 and an antenna 53, and manages water temperature information in an area where the manhole 21 (that is, the detection device 23) is provided. The temperature management device 52 may manage water temperature information measured at, for example, a water purification plant in the area where the manhole 21 is provided. Since the water temperature information of the water purification plant changes in the same manner every year, the water temperature information of the previous year or the average water temperature information of the water temperature information of multiple years is assumed to be the water temperature of the water flowing through the sewer 24 below the manhole 21. Also good.

  Information representing the water level detected by each water level sensor 233 (in this example, a current value representing water pressure) is collected by the data center 41. The current value output from the water level sensor 233 differs according to environmental changes such as the water temperature or according to different characteristics for each individual water level sensor 233. As will be described later, the data center 41 may correct (or calibrate) the water level obtained by converting the current value according to environmental changes such as water temperature information managed by the temperature management center 51, for example. . In addition, the data center 41 may correct (or calibrate) the water level obtained by converting the current value in accordance with characteristics different for each water level sensor 233. The data center 41 may store the water temperature information in a memory in the data center 41 or in a memory externally connected to the data center 41. In the latter case, the data center 41 can be used in a cloud computing system environment.

  When the data center 41 is used in the environment of a cloud computing system, the operation cost of the water level measuring device 10 can be suppressed. For example, the water temperature information managed by the temperature management center 51 can be stored in the memory in the data center 41 and reused. For example, each manhole 21 is provided with equipment for detecting the water temperature in order to measure the water temperature. Since it is not necessary to add, the installation cost of the water level measuring device 10 can be suppressed.

(First embodiment)
When the pressure detected when the water level sensor 233 is a pressure type water level sensor is expressed by p (kPa), the water level H (m) can be expressed by the following formula (1).

上記の式（１）中、Ｓ_ｇは水の比重（ｇ／ｃｍ^３）を示し、Ｃ_ｆは圧力／水位変換係数を示す。水の比重Ｓ_ｇは水温に依存するため（例えば、非特許文献１参照）、水位計測値への水温の影響は、上記の式（１）の水の比重Ｓ_ｇに正確な値を使用することにより考慮できる。つまり、水の比重Ｓ_ｇは、上記の式（１）の水の比重Ｓ_ｇに正確な値を代入することで補正することができる。

In the above formulas (1), _{S g} denotes the specific gravity (g / cm ³⁾ of water, _{C f} denotes a pressure / level conversion coefficient. Specific gravity S _g of water depends on the water temperature (for example, see Non-Patent Document 1), the influence of the water temperature in the water level measurements, using the exact value in the specific gravity S _g of water of the above formula (1) Can be considered. In other words, the specific gravity S _g of water, can be corrected by substituting the correct values in specific gravity S _g of water of the above formula (1).

  However, if the shipment inspection report of the pressure type water level sensor estimates the specific gravity of water at 25 ° C. as 1, for example, the relative value of the specific gravity of water depending on the water temperature (° C.) as shown in FIG. Can be used. FIG. 3 is a diagram illustrating an example of the relationship between the water temperature and the specific gravity of water.

  The data center 41 manages the relationship shown in FIG. 3, for example, and calculates the above equation (1). When the error of the water level detected using the relationship shown in FIG. 3 and the above equation (1) was estimated, it was confirmed to be 2.17 cm in the range of 0 m to 5 m and 4 ° C. to 30 ° C.

  FIG. 4 is a block diagram illustrating an example of the configuration of the data center in one embodiment. The data center 41 shown in FIG. 4 includes a processor 411, a memory 412, an interface (I / F) 413, a keyboard 414, and a display 415 that are connected to each other via a bus 416. The processor 411 can be formed by a CPU (Central Processing Unit) or the like and controls the entire data center 41. The memory 412 stores a program executed by the processor 411, for example, water temperature information managed by the temperature management center 51, for example, various data such as a relationship between the water temperature and the specific gravity of water shown in FIG. The memory 412 can be formed by a computer-readable storage medium such as a semiconductor storage device, a magnetic recording medium, an optical recording medium, or a magneto-optical recording medium.

  The I / F 413 is connected to the networks 32 and 33 so that the data center 41 can acquire information indicating the water level from the detection device 23 and the water temperature information from the temperature management center 51. The keyboard 414 is an example of an input device, and is used by an operator to input commands, data, and the like to the data center 41. The display 415 displays the water level in each manhole 21 obtained from information representing the water level from each detection device 23, a message to the operator, and the like.

  Note that each unit of the data center 41 is not limited to the configuration connected by the bus 416.

  FIG. 5 is a flowchart for explaining an example of processing of the data center in the first embodiment. The processing shown in FIG. 5 can be executed by, for example, executing a program stored in the memory 412 by the processor 411 shown in FIG.

  In FIG. 5, in step S <b> 1, the processor 411 displays water level data in each manhole 21, that is, information indicating the water level from each detection device 23 acquired via the GW 31 and the network 32 (in this example, a current value indicating water pressure). ) To get. In step S2, the processor 411 determines whether there is water temperature data. If the determination result is NO, the process proceeds to step S3, and if the determination result is YES, the process proceeds to step S4.

  In step S3, the processor 411 refers to the water temperature database and obtains water temperature data of the area where each manhole 21 (that is, the detection device 23) is provided. It is assumed that the acquired water temperature data represents the water temperature of the water flowing through the sewer 24 below each manhole 21. The temperature management device 52 of the temperature management center 51 may have the same configuration as the data center 41 shown in FIG. In this case, the water temperature database can be formed by the memory of the temperature management device 52, but may be formed by the memory 412 of the data center 41. That is, the processor 411 of the data center 41 may form the water temperature database by the memory 412 in the data center 41 by acquiring the water temperature data from the temperature management device 52 via the network 33. After step S3, the process proceeds to step S4.

  In step S4, the processor 411 is highly accurate based on the above equation (1) that corrects the water level data acquired in step S1 (in this example, the current value representing the water pressure) using the water temperature data and the specific gravity of water. Correct to water level data. In step S5, the processor 411 provides high-precision water level data by displaying it on the display 415, and the process ends. The water level data may be provided by outputting it to an external device via the I / F 413.

  According to the present embodiment, since the detected water level is corrected in consideration of the specific gravity of water depending on the water temperature, it is possible to detect a rise in the water level in each manhole 21 with high accuracy, and to quickly prevent flooding. Can be carried out. Moreover, the water level in each manhole 21 can be measured with high accuracy by only transmitting the minimum information (in this example, the current value representing the water pressure) from each detection device 23 to the data center 41. Since information such as temperature is not detected in each manhole 21, it is possible to reduce the cost of the detection device 23 provided on each manhole 21 side. Furthermore, since the detection device 23 provided on each manhole 21 side does not need to be provided with a high-performance processor for executing complicated processing including information such as temperature, the power consumption of the detection device 23 is reduced. it can. Therefore, when the detection device 23 is driven by a battery, the battery life is extended due to low power consumption, so that the maintenance interval of the detection device 23 can be set relatively long.

(Second embodiment)
FIG. 6 is a diagram illustrating the relationship between the water level sensor output and the pressure. In FIG. 6, Io indicated by a solid line is an output curve when the water level sensor 233 is a pressure type water level sensor, Ii indicated by a one-dot chain line is an ideal straight line, Ir indicated by a broken line is a reference straight line, and Ld indicates a linearity error. In FIG. 6, the vertical axis indicates the water level sensor output in arbitrary units. As shown in FIG. 6, the pressure is most deviated from the output curve Io is the reference straight line Ir is 50% for, it can be seen that the error is relatively large in the conversion constant C _f in the above formula (1). The manufacturer's shipment inspection report includes three points of output data under different conditions of 0%, 50%, and 100% of the pressure (water level) of the maximum measurable value (hereinafter also referred to as Full Scale (FS)). Is described. Based on these output data, (x, y) = ((FS pressure (water level), output current (mA)) and fitting the above three points with a quadratic equation, it is shown in FIG. 7 is a diagram showing an example of the fitting result of the water level sensor output and the water level, that is, the fitting result of the shipping inspection result data. A quadratic equation represented by the following equation (2) including the fitting parameters a, b, and c of the sensor 233 may be managed by a database in the memory 412. In the example shown in FIG. .0000E-04, the fitting parameter b is 1.5917E + 00, and the fitting parameter c is 4.0230E + 00.

なお、メーカー出荷検査成績書は温度にも依存するので、フィッティングパラメータａ，ｂ，ｃは、この例では水温に依存する。

Since the manufacturer shipment inspection report also depends on the temperature, the fitting parameters a, b, and c depend on the water temperature in this example.

  In the above equation (2), y (mA) is a current value (that is, a measured value) representing the water pressure, and therefore the water level x (m) can be obtained by conversion according to the following equation (3).

この結果、水温に依存した個々の水位センサ２３３の特性の影響は、上記の式（３）に従い考慮することが可能になる。

As a result, the influence of the characteristics of the individual water level sensors 233 depending on the water temperature can be considered according to the above equation (3).

  FIG. 8 is a diagram illustrating an example of shipping temperature characteristics of the water level sensor. FIG. 8 is a shipping temperature characteristic inspection table of the water level sensor 233 having the water level sensor numbers (No.) 1, 2, and 3, and shows the temperature against the pressure. In this example, fitting parameters were determined at a center temperature of 14 ° C., and expansion was attempted for each temperature. In FIG. 8, in the shipping temperature characteristic inspection table of each water level sensor, the result of 14 ° C. represents the interpolated value. SPAN indicates the displacement width of each current value.

  FIG. 9 is a diagram illustrating an example of fitting parameters of the water level sensor. In FIG. 9, the fitting parameter of each water level sensor 233 uses a water level / output curve of 14 ° C. data. In considering the influence of the water temperature, the value of the reference value 0.00 m in FIG. 8 changes linearly with the temperature gradient in the range of −2 ° C. to 23 ° C., so that instead of the fitting parameter c of each water level sensor By using it, the effect of water temperature was considered.

  FIG. 10 is a diagram illustrating an example of an error after temperature correction in the water level sensor. FIG. 10 shows the output current (y), the corrected water level (x) (or the calibration water level (x)), and the error (% FS) with respect to the reference value (m) of each water level sensor 233. As shown in FIG. 10, in this example, in the range of 0.00 m to 19.00 m and 4 ° C. to 23 ° C., it is possible to avoid an error in the detected water level of each water level sensor 233 with an accuracy of 0.07% FS or less. confirmed.

  The fitting parameters a, b, and c at each temperature can be accurately determined as described above, and can be managed by the data center 41 in the database in the memory 412. In particular, when the water temperature is a relatively high temperature of 23 ° C. or higher, it is desirable to determine the fitting parameters a, b, and c again.

  FIG. 11 is a flowchart illustrating an example of data center processing according to the second embodiment. In FIG. 11, the same steps as those in FIG. In FIG. 11, in step S <b> 13, the processor 411 refers to the water temperature database, and acquires water temperature data of an area where the manhole 21 (that is, the detection device 23) is provided. It is assumed that the acquired water temperature data represents the water temperature of the water flowing through the sewer 24 below the manhole 21. The temperature management device 52 of the temperature management center 51 may have the same configuration as the data center 41 shown in FIG. In this case, the water temperature database can be formed by the memory of the temperature management device 52, but may be formed by the memory 412 of the data center 41. After step S13, the process proceeds to step S14.

  In step S14, the processor 411 corrects the water level data acquired in step S1 using the water temperature data and the characteristics of the individual (or individual) water level sensor 233 based on the above equation (3). To correct.

  FIG. 12 is a diagram for explaining an example of a one-year change in water temperature at a water purification plant. In FIG. 12, A indicates the water temperature of the water purification plant A, B indicates the water temperature of the water purification plant B, and C indicates the water temperature of the water purification plant C. Water purification plants are scattered in various places and manage water quality, water temperature, etc. as needed. For example, as shown in FIG. 12, in a certain area, the water temperature is disclosed for each area where water purification plants A, B, and C are present. Since running water in the manhole is mixed with rainwater, the water temperature in the manhole near each of the water purification plants A, B, C is expected to be close to the water temperature of the corresponding water purification plants A, B, C. Therefore, the water temperature of the water purification plant may be assumed to be the temperature of the water flowing through the sewer 24 below the manhole 21 near the water purification plant. In addition, although it is desirable to acquire the water temperature of water purification plants A, B, and C directly, it is also possible to use the average water temperature of each period of a normal year as a database.

  When the sewage water temperature at the sewage treatment plant can be obtained, the water temperature in the manhole on the upstream side of the sewage treatment plant is expected to be close to the sewage water temperature at the sewage treatment plant. Therefore, the water temperature of the sewage treatment plant may be assumed to be the temperature of the water flowing through the sewer 24 below the manhole 21 on the upstream side of the sewage treatment plant. Furthermore, if there is an institution that measures and publishes the water temperature of reservoirs and rivers, the published water temperature is calculated as the water temperature flowing through the sewer 24 below the manhole 21 downstream of the reservoir and river. It can be assumed.

  In this way, the water temperature at a certain point among the publicly disclosed water purification plants, sewage treatment plants, reservoirs, rivers, and the like may be databased in the memory 412 of the data center 41. That is, the water temperature database may be based on the water temperature at a fixed point or the average of the water temperature at a fixed point in each period (for example, each month) for a predetermined number of years.

  According to the present embodiment, since the detected water level is corrected in consideration of the characteristics of the water level sensor depending on the water temperature, it is possible to detect the rise in the water level in each manhole 21 with high accuracy, and to quickly flood. Can take measures. Moreover, the water level in each manhole 21 can be measured with high accuracy by only transmitting the minimum information (in this example, the current value representing the water pressure) from each detection device 23 to the data center 41. Since information such as temperature is not detected in each manhole 21, it is possible to reduce the cost of the detection device 23 provided on each manhole 21 side. Furthermore, since the detection device 23 provided on each manhole 21 side does not need to be provided with a high-performance processor for executing complicated processing including information such as temperature, the power consumption of the detection device 23 is reduced. it can. Therefore, when the detection device 23 is driven by a battery, the battery life is extended due to low power consumption, so that the maintenance interval of the detection device 23 can be set relatively long.

(Third embodiment)
FIG. 13 is a flowchart for explaining an example of data center processing in the third embodiment. In FIG. 13, the same steps as those in FIG. 5 are denoted by the same reference numerals, and the description thereof is omitted. In FIG. 11, in step S <b> 23, the processor 411 refers to the water temperature database, and acquires water temperature data of the area where the manhole 21 (that is, the detection device 23) is provided. It is assumed that the acquired water temperature data represents the water temperature of the water flowing through the sewer 24 below the manhole 21. The temperature management device 52 of the temperature management center 51 may have the same configuration as the data center 41 shown in FIG. In this case, the water temperature database can be formed by the memory of the temperature management device 52, but may be formed by the memory 412 of the data center 41. After step S23, the process proceeds to step S14.

  In step S <b> 14, the processor 411 corrects the water level data acquired in step S <b> 1 using the water temperature data and the characteristics of the individual (or individual) water level sensor 233, based on the above equation (3). To correct. In step S4, the processor 411 corrects the water level data acquired in step S1 to highly accurate water level data based on the above equation (1) that is corrected using the water temperature data and the specific gravity of water.

  According to the present embodiment, the detected water level is corrected in consideration of the specific gravity of the water that depends on the water temperature and the characteristics of the water level sensor that depends on the water temperature, so that an increase in the water level in each manhole 21 is detected with high accuracy. It is possible to perform flood countermeasures quickly. Moreover, the water level in each manhole 21 can be measured with high accuracy by only transmitting the minimum information (in this example, the current value representing the water pressure) from each detection device 23 to the data center 41. Since information such as temperature is not detected in each manhole 21, it is possible to reduce the cost of the detection device 23 provided on each manhole 21 side. Furthermore, since the detection device 23 provided on each manhole 21 side does not need to be provided with a high-performance processor for executing complicated processing including information such as temperature, the power consumption of the detection device 23 is reduced. it can. Therefore, when the detection device 23 is driven by a battery, the battery life is extended due to low power consumption, so that the maintenance interval of the detection device 23 can be set relatively long.

  Therefore, according to each of the embodiments described above, it is possible to measure the water level in the manhole with high accuracy in consideration of the influence of environmental changes such as the water temperature.

The following additional notes are further disclosed with respect to the embodiment including the above examples.
(Appendix 1)
With an information processing device that acquires water level information from a water level sensor that detects the water level in the manhole,
The information processing apparatus includes a processor that corrects a water level detected by the water level sensor in consideration of a specific gravity of water depending on the water temperature with reference to a water temperature database in an area where the manhole is provided. A water level measuring device.
(Appendix 2)
The water level measuring device according to claim 1, wherein the processor refers to the water temperature database and corrects the water level detected by the water level sensor further considering characteristics of the water level sensor depending on the water temperature. .
(Appendix 3)
The water level measurement device according to appendix 1 or 2, wherein the information processing device acquires water level information from a plurality of water level sensors that detect water levels in a plurality of different manholes by wireless communication.
(Appendix 4)
4. The water level measurement according to claim 1, wherein the processor acquires a current value representing the detected water pressure output from the water level sensor, and converts the current value into a water level. 5. apparatus.
(Appendix 5)
When the pressure detected by the water level sensor is expressed as p (kPa), the specific gravity of water (g / cm ³ ) as S _g , and the pressure / water level conversion coefficient as C _f , the processor expresses the water level H (m) as

から求めることを特徴とする、付記４記載の水位計測装置。
（付記６）
前記プロセッサは、
前記水位センサが測定可能な最大値の圧力の異なる条件における出力データを基に、（ｘ，ｙ）＝（(最大値の圧力，出力電流（ｍＡ））として、前記異なる条件における出力データをフィッティングパラメータａ，ｂ，ｃを含む２次方程式

The water level measuring device according to appendix 4, wherein the water level measuring device is obtained from
(Appendix 6)
The processor is
Based on the output data under different conditions of the maximum pressure that the water level sensor can measure, fitting the output data under the different conditions as (x, y) = ((maximum pressure, output current (mA)) Quadratic equation including parameters a, b, c

でフィッティングし、
前記２次方程式中、水圧を表す電流値ｙ（ｍＡ）を次式により変換して水位ｘ（ｍ）を求める

Fitting with
In the quadratic equation, the current value y (mA) representing the water pressure is converted by the following equation to obtain the water level x (m).

ことを特徴とする、付記２乃至５のいずれか１項記載の水位計測装置。
（付記７）
前記水温のデータベースは、公表されている浄水場、下水処理場、貯水池、及び河川のうち一定点における水温、或いは、所定年数分の各時期の前記一定点における水温の平均に基づくものであることを特徴とする、付記１乃至６のいずれか１項記載の水位計測装置。
（付記８）
マンホール内の水位を検知する水位センサからの水位情報を取得する情報処理装置を備え、
前記情報処理装置は、前記マンホールが設けられた地域の水温のデータベースを参照し、前記水温に依存する前記水位センサの特性を考慮して前記水位センサが検知した水位を補正するプロセッサを有することを特徴とする、水位計測装置。
（付記９）
情報処理装置が、マンホール内の水位を検知する水位センサからの水位情報を取得し、
前記情報処理装置が、前記マンホールが設けられた地域の水温のデータベースを参照し、前記水温に依存する水の比重を考慮して前記水位センサが検知した水位を補正する、
ことを特徴とする、水位計測方法。
（付記１０）
前記情報処理装置が、前記水温のデータベースを参照し、前記水温に依存する前記水位センサの特性をさらに考慮して前記水位センサが検知した水位を補正することを特徴とする、付記９記載の水位計測方法。
（付記１１）
前記情報処理装置が、互いに異なる複数のマンホール内の水位を検知する複数の水位センサからの水位情報を無線通信により取得することを特徴とする、付記９または１０記載の水位計測方法。
（付記１２）
前記情報処理装置が、前記水位センサから出力された、検知した水圧を表す電流値を取得し、前記電流値を水位に変換することを特徴とする、付記９乃至１１のいずれか１項記載の水位計測方法。
（付記１３）
前記情報処理装置が、前記水位センサが検知する圧力をｐ（ｋＰａ）、水の比重（ｇ／ｃｍ^３）をＳ_ｇ、圧力／水位変換係数をＣ_ｆで示すと、水位Ｈ（ｍ）を次式

The water level measuring device according to any one of appendices 2 to 5, characterized in that:
(Appendix 7)
The water temperature database is based on the water temperature at a certain point among the publicly disclosed water purification plants, sewage treatment plants, reservoirs, and rivers, or the average of the water temperature at the certain point for each period of a predetermined number of years. The water level measuring device according to any one of appendices 1 to 6, characterized in that:
(Appendix 8)
With an information processing device that acquires water level information from a water level sensor that detects the water level in the manhole,
The information processing apparatus includes a processor that corrects a water level detected by the water level sensor by referring to a database of a water temperature in an area where the manhole is provided and considering characteristics of the water level sensor depending on the water temperature. A water level measurement device.
(Appendix 9)
The information processing device acquires water level information from a water level sensor that detects the water level in the manhole,
The information processing apparatus refers to a water temperature database in the area where the manhole is provided, and corrects the water level detected by the water level sensor in consideration of the specific gravity of water depending on the water temperature.
The water level measuring method characterized by the above-mentioned.
(Appendix 10)
The water level according to appendix 9, wherein the information processing device refers to the water temperature database and corrects the water level detected by the water level sensor further considering characteristics of the water level sensor depending on the water temperature. Measurement method.
(Appendix 11)
11. The water level measurement method according to appendix 9 or 10, wherein the information processing apparatus acquires water level information from a plurality of water level sensors that detect water levels in a plurality of different manholes by wireless communication.
(Appendix 12)
The said information processing apparatus acquires the electric current value showing the detected water pressure output from the said water level sensor, The said electric current value is converted into a water level, The additional statement 9 thru | or 11 characterized by the above-mentioned. Water level measurement method.
(Appendix 13)
When the information processing device indicates the pressure detected by the water level sensor as p (kPa), the specific gravity of water (g / cm ³ ) as S _g , and the pressure / water level conversion coefficient as C _f , the water level H (m) is expressed as follows. Next formula

から求めることを特徴とする、付記１２記載の水位計測方法。
（付記１４）
前記情報処理装置が、
前記水位センサが測定可能な最大値の圧力の異なる条件における出力データを基に、（ｘ，ｙ）＝（(最大値の圧力，出力電流（ｍＡ））として、前記異なる条件における出力データをフィッティングパラメータａ，ｂ，ｃを含む２次方程式

The water level measurement method according to appendix 12, wherein the water level measurement method is obtained from:
(Appendix 14)
The information processing apparatus is
Based on the output data under different conditions of the maximum pressure that the water level sensor can measure, fitting the output data under the different conditions as (x, y) = ((maximum pressure, output current (mA)) Quadratic equation including parameters a, b, c

でフィッティングし、
前記２次方程式中、水圧を表す電流値ｙ（ｍＡ）を次式により変換して水位ｘ（ｍ）を求める

Fitting with
In the quadratic equation, the current value y (mA) representing the water pressure is converted by the following equation to obtain the water level x (m).

ことを特徴とする、付記１０乃至１３のいずれか１項記載の水位計測方法。
（付記１５）
コンピュータに、水位を計測する処理を実行させるプログラムであって、
マンホール内の水位を検知する水位センサからの水位情報を取得し、
前記マンホールが設けられた地域の水温のデータベースを参照し、前記水温に依存する水の比重を考慮して前記水位センサが検知した水位を補正する、
処理を前記コンピュータに実行させることを特徴とする、プログラム。
（付記１６）
前記水温のデータベースを参照し、前記水温に依存する前記水位センサの特性をさらに考慮して前記水位センサが検知した水位を補正する処理を前記コンピュータにさらに実行させることを特徴とする、付記１５記載のプログラム。
（付記１７）
前記取得は、互いに異なる複数のマンホール内の水位を検知する複数の水位センサからの水位情報を無線通信により取得することを特徴とする、付記１５または１６記載のプログラム。
（付記１８）
前記水位センサから出力された、検知した水圧を表す電流値を取得し、前記電流値を水位に変換する処理を前記コンピュータにさらに実行させることを特徴とする、付記１５乃至１７のいずれか１項記載のプログラム。
（付記１９）
前記水位センサが検知する圧力をｐ（ｋＰａ）、水の比重（ｇ／ｃｍ^３）をＳ_ｇ、圧力／水位変換係数をＣ_ｆで示すと、水位Ｈ（ｍ）を次式

14. The water level measuring method according to any one of appendices 10 to 13, characterized in that:
(Appendix 15)
A program for causing a computer to execute a process for measuring a water level,
Obtain water level information from the water level sensor that detects the water level in the manhole,
Refers to the water temperature database of the area where the manhole is provided, and corrects the water level detected by the water level sensor in consideration of the specific gravity of water depending on the water temperature,
A program for causing a computer to execute processing.
(Appendix 16)
The supplementary note 15, wherein the computer is further caused to perform processing for correcting the water level detected by the water level sensor by referring to the water temperature database and further considering characteristics of the water level sensor depending on the water temperature. Program.
(Appendix 17)
The program according to Supplementary Note 15 or 16, wherein the acquisition is performed by wireless communication to acquire water level information from a plurality of water level sensors that detect water levels in a plurality of different manholes.
(Appendix 18)
Any one of appendices 15 to 17, characterized in that the computer further executes a process of acquiring a current value representing the detected water pressure output from the water level sensor and converting the current value to a water level. The listed program.
(Appendix 19)
When the pressure detected by the water level sensor is p (kPa), the specific gravity of water (g / cm ³ ) is S _g , and the pressure / water level conversion coefficient is C _f , the water level H (m) is

から求める処理を前記コンピュータにさらに実行させることを特徴とする、付記１８記載のプログラム。
（付記２０）
前記水位センサが測定可能な最大値の圧力の異なる条件における出力データを基に、（ｘ，ｙ）＝（(最大値の圧力，出力電流（ｍＡ））として、前記異なる条件における出力データをフィッティングパラメータａ，ｂ，ｃを含む２次方程式

The program according to appendix 18, wherein the computer is further caused to execute a process obtained from the above.
(Appendix 20)
Based on the output data under different conditions of the maximum pressure that the water level sensor can measure, fitting the output data under the different conditions as (x, y) = ((maximum pressure, output current (mA)) Quadratic equation including parameters a, b, c

でフィッティングし、
前記２次方程式中、水圧を表す電流値ｙ（ｍＡ）を次式により変換して水位ｘ（ｍ）を求める

Fitting with
In the quadratic equation, the current value y (mA) representing the water pressure is converted by the following equation to obtain the water level x (m).

処理を前記コンピュータにさらに実行させることを特徴とする、付記１６乃至１９のいずれか１項記載のプログラム。

The program according to any one of appendices 16 to 19, further causing the computer to execute processing.

  Note that, for example, “first”, “second”, and “third” are assigned to the above-described embodiments, but these orders do not represent the priorities of the embodiments.

  In the above, the disclosed water level measuring device, method and program have been described by way of example. However, the present invention is not limited to the above example, and various modifications and improvements can be made within the scope of the present invention. Needless to say.

21 Manhole 22 Manhole cover 23 Detector 24 Sewer 31 GW
32, 33 Network 41 Data center 51 Temperature management center 52 Temperature management device 231 Waterproof housing 233 Water level sensor 411 Processor 412 Memory 413 I / F
414 Keyboard 415 Display 416 Bus

Claims (5)

With an information processing device that acquires water level information from a water level sensor that detects the water level in the manhole,
The information processing apparatus includes a processor that corrects a water level detected by the water level sensor in consideration of a specific gravity of water depending on the water temperature with reference to a water temperature database in an area where the manhole is provided. A water level measuring device.   2. The water level measurement according to claim 1, wherein the processor refers to a database of the water temperature and corrects the water level detected by the water level sensor further considering characteristics of the water level sensor depending on the water temperature. apparatus.   The water level measuring device according to claim 1 or 2, wherein the processor acquires a current value representing a detected water pressure output from the water level sensor, and converts the current value into a water level. The information processing device acquires water level information from a water level sensor that detects the water level in the manhole,
The information processing apparatus refers to a water temperature database in the area where the manhole is provided, and corrects the water level detected by the water level sensor in consideration of the specific gravity of water depending on the water temperature.
The water level measuring method characterized by the above-mentioned. A program for causing a computer to execute a process for measuring a water level,
Obtain water level information from the water level sensor that detects the water level in the manhole,
Refers to the water temperature database of the area where the manhole is provided, and corrects the water level detected by the water level sensor in consideration of the specific gravity of water depending on the water temperature,
A program for causing a computer to execute processing.

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