Water level measurement system
The water level measurement system addresses long-term and high water level measurement challenges by integrating power generation and storage within the detection unit, enabling accurate calculation and urgent warning issuance during flooding.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- TATSUMI CORP
- Filing Date
- 2025-07-08
- Publication Date
- 2026-05-29
Smart Images
Figure 2026089008000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a water level measurement system.
Background Art
[0002] Conventionally, as disclosed in Patent Document 1, a device for measuring the water level has been proposed.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] However, long-term measurement and countermeasures in the case of high water levels and flooding have not been sufficiently considered.
[0005] Therefore, an object of the present invention is to provide a water level measurement system that can cope with long-term measurement and high water levels.
Means for Solving the Problems
[0006] The water level measurement system according to the present invention includes a measurement unit having a first detection unit, a case, and a fixing unit, and an aggregation unit having an aggregation unit side communication device and an aggregation unit side output device. The case is fixed in a region for measuring the water level in a state of covering the first detection unit and allowing water to enter from below. The first detection unit is attached inside the case and includes a first power generation device, a first power storage device, a first detection device, and a first communication device. The first power storage device stores the power obtained by the first power generation device. The first detection device detects information regarding the air pressure inside the case. The first detection device and the first communication device are driven based on at least one of the power obtained from the first power generation device and the power stored in the first energy storage device. Information regarding the atmospheric pressure inside the case obtained by the first detection device, or information regarding the water level in the region calculated based on the information regarding the atmospheric pressure inside the case, is transmitted directly or indirectly from the first communication device to the aggregation unit side communication device. At least one of the first detection unit and the aggregation unit calculates information regarding the water level in the region. The output device on the aggregation unit side outputs information regarding the water level in the area.
[0007] Using the first detection unit installed inside the case, it becomes possible to easily calculate the water level in the area where the case is installed. The first detection unit is equipped with both power generation and energy storage capabilities, enabling it to detect the internal air pressure of the case for extended periods without external power supply. Furthermore, since the aggregation unit can be located separately from the measurement unit, it can provide water level information even if the measurement unit is submerged.
[0008] Preferably, the aggregation unit-side output device does not output a warning in a first state where the atmospheric pressure inside the case is below a pressure threshold, outputs a warning in a second state where the atmospheric pressure inside the case is above the pressure threshold, and outputs a warning that is more urgent than in the second state in a third state where the aggregation unit-side communication device cannot receive information from the first communication device.
[0009] Because radio waves become less able to reach the device, the case may be submerged in water, and the water level may be higher than the point at which the water level can be calculated, allowing for a high-priority warning to be issued.
[0010] More preferably, the first power generation device has solar panels. The first power generator, the first energy storage device, the first detection device, and the first communication device are housed in a single enclosure. In the case described above, at least the region facing the light-receiving surface of the first power generation device is made of a light-transmitting material.
[0011] By simply installing the first measurement unit inside the case, it becomes possible to easily configure the measurement unit.
[0012] Preferably, the first power generation device includes solar panels. The case includes a cylindrical section and a lid section. The upper part of the cylindrical portion and the lid portion are made of light-shielding material. The lower part of the cylindrical section is made of a light-transmitting material. The first power generation device is mounted on the lower surface of the lid such that the light-receiving surface of the solar panel faces downward.
[0013] The first detection unit is not exposed to direct sunlight from above. However, light that enters through the lower part of the cylindrical section, which is made of a light-transmitting material, and is reflected from the water surface, reaches the light-receiving surface of the first power generation device. Therefore, the first power generation device can generate electricity by receiving sunlight indirectly while avoiding direct sunlight.
[0014] Preferably, the first power generation device includes solar panels. The case includes a cylindrical section, a lid section, and an inner lid. The cylindrical portion, the lid portion, and the inner lid are constructed as separate components. The upper part of the cylindrical portion and the lid portion are made of light-shielding material. The lower part of the cylindrical section is made of a light-transmitting material. The inner lid is held between the projection on the inner wall of the cylindrical portion and the lid portion. The first power generation device is mounted on the lower surface of the inner lid such that the light-receiving surface of the solar panel faces downward.
[0015] The cylindrical section, lid section, and inner lid can be separated, making maintenance of the case and the first detection unit, as well as attaching and detaching the first detection unit from the case, easier compared to a configuration where the case is an integrated unit. By sandwiching the inner lid between the upper part of the cylindrical part and the lid part, sealing between the cylindrical part and the lid part can be easily achieved.
[0016] Also, preferably, the case has a closed bottom surface, and a side opening is formed in a lower part of the side surface in a region that does not contact the lower end part of the case.
[0017] Compared with the form in which the bottom surface of the case is open, it is easy to prevent the intrusion of dust, etc., and the contact area can be increased, so that the case can be easily fixed to the fixing part, etc.
[0018] The water level measurement system according to the present invention includes a measurement unit having a first detection unit, a second detection unit, a case, and a fixing part, and a totaling unit having a totaling unit side communication device and a totaling unit side output device. The case is fixed in a region for measuring the water level in a state of covering the first detection unit and allowing water to penetrate from below. The first detection unit is attached inside the case and includes a first power generation device, a first power storage device, a first detection device, and a first communication device. The second detection unit is attached outside the case and includes a second power generation device, a second power storage device, a second detection device, and a second communication device. The first power storage device stores the power obtained by the first power generation device. The first detection device detects information regarding the air pressure inside the case. The first detection device and the first communication device are driven based on at least one of the power obtained by the first power generation device and the power stored in the first power storage device. The second power storage device stores the power obtained by the second power generation device. The second detection device detects information regarding the air pressure outside the case. The second detection device and the second communication device are driven based on at least one of the power obtained by the second power generation device and the power stored in the second power storage device. The information regarding the air pressure inside the case obtained by the first detection device is transmitted from the first communication device to the totaling unit side communication device directly or indirectly. The information regarding the atmospheric pressure outside the case obtained by the second detection device is transmitted directly or indirectly from the second communication device to the aggregation unit side communication device. The aggregation unit calculates information regarding the water level in the region based on information regarding the atmospheric pressure inside the case and information regarding the atmospheric pressure outside the case. The output device on the aggregation unit side outputs information regarding the water level in the area.
[0019] Based on the internal and external atmospheric pressure of the case in the area where the water level is measured, accurate water level measurement becomes possible in response to atmospheric pressure fluctuations. [Effects of the Invention]
[0020] As described above, the present invention provides a water level measurement system that can handle long-term measurements and high water levels. [Brief explanation of the drawing]
[0021] [Figure 1] This is a diagram showing the configuration of the water level measurement system in the first embodiment. [Figure 2] This is a perspective view showing the specific configuration of the first detection unit and the case. [Figure 3] This figure shows an example of the output of the first state by the output device on the aggregation unit side. [Figure 4] This is a diagram showing the configuration of the measurement unit with a portion submerged in water. [Figure 5] This figure shows an example of output from the aggregation unit's output device for the second state. [Figure 6] This figure shows an example of output for the third state from the output device on the aggregation unit side. [Figure 7] This is a diagram showing the configuration of the water level measurement system in the second embodiment. [Figure 8] This is an exploded cross-sectional view of the case, including the inner lid to which the first power generation device in the third embodiment is attached. [Figure 9] This is a cross-sectional view of the case, including the inner lid to which the first power generation device in the third embodiment is attached. [Figure 10] This is a cross-sectional view of the case, including the inner lid to which the first power generation device in the fourth embodiment is attached. [Modes for carrying out the invention]
[0022] The first embodiment will be described below with reference to the figures. The embodiments are not limited to those described below. Furthermore, the content described in one embodiment generally applies to other embodiments as well. Also, each embodiment and each variation can be combined as appropriate.
[0023] (Water level measurement system 1) The water level measurement system 1 in the first embodiment includes a measurement unit 10, a relay unit 30, and a data aggregation unit 50 (see Figure 1).
[0024] (Measurement unit 10) The measurement unit 10 includes a first detection unit 11, a case 13, and a fixing unit 15.
[0025] (First detection unit 11) The first detection unit 11 includes a first power generator 11a, a first energy storage device 11b, a first detection device 11c, and a first communication device 11d. The first power generation device 11a has solar panels for generating solar power. The first energy storage device 11b stores the electricity obtained from the first power generation device 11a. The first detection device 11c detects information regarding the atmospheric pressure P1 inside the case 13. In addition to information regarding the atmospheric pressure P1 inside the case 13, the first detection device 11c may also detect information regarding temperature, vibration, sound, humidity, and at least one of specific substances in the air. The first communication device 11d transmits the information obtained by the first detection device 11c to the relay unit 30. The first detection device 11c and the first communication device 11d are driven based on at least one of the power obtained from the first power generator 11a and the power stored in the first energy storage device 11b.
[0026] The first detection unit 11 is mounted inside the case 13. The first power generator 11a, the first energy storage device 11b, the first detection device 11c, and the first communication device 11d of the first detection unit 11 are housed in a single enclosure. However, these may be composed of separate entities.
[0027] (Case 13) Case 13 includes a cylindrical portion 13a and a lid portion 13b. Case 13 has a cylindrical shape with a closed top and an open bottom, and covers the top of the first detection unit 11. Case 13 holds the first detection unit 11 inside the cylindrical portion 13a. In case 13, at least the region of the first power generation device 11a facing the light-receiving surface is made of a light-transmitting material. In this embodiment, the entire case 13 (cylindrical portion 13a, lid portion 13b) is integrally constructed from a light-transmitting material, and the first detection unit 11 is attached to the inner wall of the cylindrical portion 13a (see Figure 2). Case 13 is filled with a gas such as air.
[0028] (Fixed part 15) The fixing part 15 secures the bottom surface of the case 13 to the ground or the like. However, the bottom of case 13 is not sealed, and water may enter from the outside. Therefore, case 13 is fixed to the area where the water level is measured via the fixing part 15.
[0029] (Relay section 30) The relay unit 30 receives information from the first communication device 11d and transmits it to the aggregation unit 50. The relay unit 30 is positioned away from the measurement unit 10.
[0030] (Aggregation Section 50) The aggregation unit 50 includes an aggregation unit-side communication device 51, an aggregation unit-side control device 53, and an aggregation unit-side output device 55. The aggregation unit 50 is positioned further away from the measurement unit 10 than the relay unit 30.
[0031] (Communication device 51 on the aggregation unit side) The aggregation unit's communication device 51 receives information transmitted from the first communication device 11d (such as information regarding the atmospheric pressure P1 inside the case 13) via the relay unit 30.
[0032] (Data collection unit side control device 53) The aggregation unit control device 53 controls each part of the aggregation unit 50. The data collection unit control device 53 calculates information regarding the water level in the area where the measurement unit 10 is installed, based on information regarding the atmospheric pressure P1 inside the case 13. Specifically, the aggregation unit control device 53 calculates the first water level h1 based on a table (not shown) that represents the relationship between the water level around the case 13 (first water level h1), the height of water that enters the inside of the case 13 corresponding to the first water level h1 (second water level h2), and the atmospheric pressure P1 inside the case 13.
[0033] (Output device 55 on the aggregation unit side) The aggregation unit output device 55 outputs information regarding the first water level h1 obtained by the aggregation unit control device 53. The aggregation unit output device 55 may include information regarding the location of the measurement unit 10 and information regarding whether evacuation is necessary.
[0034] If the area where the measurement unit 10 is installed is not flooded at all, the atmospheric pressure P1 inside the case 13 obtained by the first detection device 11c will be equal to atmospheric pressure. Therefore, if the pressure P1 inside case 13 obtained by the first detection device 11c is about the same as atmospheric pressure (below a predetermined pressure threshold Thp1), the calculated first water level h1 will be a low value (first state). In this case, the information regarding the necessity of evacuation output to the aggregation unit output device 55 includes information indicating a low degree of urgency (for example, "No evacuation is necessary") (see Figure 3). In other words, the aggregation unit output device 55 does not output a warning.
[0035] If the area where the measurement unit 10 is installed is submerged in water to a position higher than the fixing unit 15, the air pressure P1 inside the case 13 obtained by the first detection device 11c will be higher than atmospheric pressure (see Figure 4). Therefore, if the pressure P1 inside case 13 obtained by the first detection device 11c is higher than atmospheric pressure (higher than the pressure threshold Thp1), the calculated first water level h1 will be a high value (second state). In this case, the information regarding the necessity of evacuation output to the aggregation unit output device 55 includes, for example, information indicating a higher degree of urgency than the first state (for example, "Prepare to evacuate") (see Figure 5). In other words, the aggregation unit output device 55 outputs a warning.
[0036] However, if the first water level h1 becomes very high and case 13 is completely submerged, information from the first communication device 11d will not reach the relay unit 30. Therefore, if the information regarding the atmospheric pressure P1 inside case 13 obtained by the first detection device 11c cannot be received by the aggregation unit side communication device 51 via the relay unit 30, it is considered that the first water level h1 is higher than the second state (third state). In this case, the information regarding the first water level h1 output to the aggregation unit output device 55 includes, for example, information indicating that measurement is impossible, and the information regarding the necessity of evacuation includes information indicating a higher degree of urgency than the second state (for example, "Please begin evacuating") (see Figure 6). In other words, the aggregation unit output device 55 outputs a warning that is more urgent than the second state.
[0037] (The effect of calculating the first water level h1 based on the internal pressure P1 in Case 13) Using the first detection unit 11 installed inside the case 13, it becomes possible to easily calculate the water level in the area where the case 13 is installed. Since the first detection unit 11 has both power generation and energy storage capabilities, it is possible to detect the atmospheric pressure P1 inside the case 13 for a long period of time without receiving power from an external source. Furthermore, since the aggregation unit 50 can be positioned separately from the measurement unit 10, information regarding the first water level h1 can be provided by the aggregation unit 50 even if the measurement unit 10 is submerged.
[0038] (The effect of issuing a warning when communication is interrupted) Because radio waves have difficulty reaching the relay unit 30, etc., the first water level h1 is higher than the state in which case 13 is submerged and the first water level h1 can be calculated, and a high-priority warning output can be issued.
[0039] (Effects of housing the first power generator 11a and other components in a single enclosure) By simply installing the first detection unit 11 inside the case 13, the measurement unit 10 can be easily constructed.
[0040] (Examples of applications of the system used to calculate atmospheric pressure P1) In the first embodiment, an example was described in which the aggregation unit-side control device 53 calculates information regarding the first water level h1 based on information regarding the atmospheric pressure P1 inside the case 13. However, the first detection device 11c, or the control device (not shown) of the first detection unit 11, may calculate information regarding the first water level h1, and the first communication device 11d may transmit the calculated information regarding the first water level h1 to the aggregation unit 50 via the relay unit 30.
[0041] (Examples of applications of output content from the aggregation unit output device 55) In the first embodiment, an example was described in which the aggregation unit output device 55 displays information such as the current first water level h1 in characters. However, the output device 55 on the aggregation unit side may display information regarding the first water level h1 in a time series using a graph or the like, or it may output it as audio.
[0042] (Examples of communication path applications) In the first embodiment, an example was described in which information from the first communication device 11d is indirectly transmitted to the aggregation unit-side communication device 51 via the relay unit 30. However, information from the first communication device 11d may be transmitted directly to the aggregation unit-side communication device 51 without going through the relay unit 30.
[0043] (Example of application with multiple measurement units 10) In the first embodiment, an example was described in which the water level measurement system 1 comprises one measurement unit 10. However, the water level measurement system 1 may include multiple measurement units 10. In this case, information regarding the atmospheric pressure P1 inside each case 13, or information regarding the water level (first water level h1) around each case 13, is transmitted from each of the first communication devices 11d of the multiple measurement units 10 to one of the aggregation unit-side communication devices 51 via one or more relay units 30.
[0044] (Examples of applications of the measurement unit 10) In the first embodiment, the measurement unit 10 was described in which one detection unit (first detection unit 11) is provided inside the case 13. However, an additional detection unit (second detection unit 12) may be provided outside case 13 (see second embodiment, Figure 7).
[0045] The measurement unit 10 of the second embodiment includes a first detection unit 11, a second detection unit 12, a case 13, and a fixing unit 15. The configuration of the first detection unit 11, case 13, and fixing unit 15 in the second embodiment is the same as the configuration of the first detection unit 11, case 13, and fixing unit 15 in the first embodiment.
[0046] (Second detection unit 12) The second detection unit 12 includes a second power generator 12a, a second energy storage device 12b, a second detection device 12c, and a second communication device 12d. The second power generation device 12a has solar panels for generating solar power. The second energy storage device 12b stores the electricity generated by the second power generation device 12a. The second detection device 12c detects information regarding the atmospheric pressure P2 outside case 13. In addition to information regarding the atmospheric pressure P2 outside case 13, the second detection device 12c may also detect information regarding temperature, vibration, sound, humidity, and at least one of specific substances in the air. The second communication device 12d transmits the information obtained by the second detection device 12c to the relay unit 30. The second detection device 12c and the second communication device 12d are driven based on at least one of the power obtained from the second power generator 12a and the power stored in the second energy storage device 12b.
[0047] The second detection unit 12 is mounted on the outside of the case 13. The second power generator 12a, second energy storage device 12b, second detection device 12c, and second communication device 12d of the second detection unit 12 are housed in a single enclosure. However, these may be composed of separate entities.
[0048] The configuration of the relay unit 30 and the aggregation unit 50 in the second embodiment is substantially the same as the configuration of the relay unit 30 and the aggregation unit 50 in the first embodiment.
[0049] However, the aggregation unit-side control device 53 of the second embodiment calculates information regarding the water level in the area where the measurement unit 10 is installed based on information regarding the atmospheric pressure P1 inside the case 13 and the atmospheric pressure P2 outside the case 13. Specifically, the aggregation unit control device 53 calculates the first water level h1 based on a table (not shown) that represents the relationship between the water level around the case 13 (first water level h1), the height of water that enters the case 13 corresponding to the first water level h1 (second water level h2), the atmospheric pressure P1 inside the case 13, and the atmospheric pressure P2 outside the case 13.
[0050] If the area where the measurement unit 10 is installed is not flooded at all, the atmospheric pressure P1 inside the case 13 obtained by the first detection device 11c will be equal to the atmospheric pressure P2 outside the case 13. Therefore, if the atmospheric pressure P1 inside case 13 obtained by the first detection device 11c is about the same as the atmospheric pressure P2 outside case 13 (it is less than or equal to the atmospheric pressure threshold Thp2 which fluctuates based on atmospheric pressure P2), the calculated first water level h1 will be a low value (first state). In this case, the information regarding the necessity of evacuation output to the aggregation unit output device 55 includes information indicating a low degree of urgency. In other words, the aggregation unit output device 55 does not output a warning.
[0051] If the area where the measurement unit 10 is installed is submerged in water to a position higher than the fixing unit 15, the atmospheric pressure P1 inside the case 13 obtained by the first detection device 11c will be higher than the atmospheric pressure P2 outside the case 13. Therefore, if the atmospheric pressure P1 inside case 13 obtained by the first detection device 11c is higher than the atmospheric pressure P2 outside case 13 (higher than the atmospheric pressure threshold Thp2), the calculated first water level h1 will be a high value (second state). In this case, the information regarding the necessity of evacuation output to the aggregation unit output device 55 includes, for example, information that is more urgent than the first state. In other words, the aggregation unit output device 55 outputs a warning.
[0052] However, if the first water level h1 becomes very high and case 13 is completely submerged, information from the first communication device 11d and the second communication device 12d will not reach the relay unit 30. Therefore, if the information regarding the atmospheric pressure P1 inside case 13 obtained by the first detection device 11c and the information regarding the atmospheric pressure P2 outside case 13 obtained by the second detection device 12c cannot be received by the aggregation unit side communication device 51 via the relay unit 30, it is considered that the first water level h1 is higher than the second state (third state). In this case, the information regarding the first water level h1 output to the aggregation unit output device 55 includes, for example, information indicating that measurement is impossible, and the information regarding the necessity of evacuation includes information indicating a higher degree of urgency than the second state. In other words, the aggregation unit output device 55 outputs a warning that is more urgent than the second state.
[0053] (Effects of providing the second detection unit 12 outside of case 13) Based on the internal pressure P1 and external pressure P2 of the water level measurement area in case 13, accurate water level measurement becomes possible in response to pressure fluctuations.
[0054] (Application Example 1 of Case 13, Third Embodiment) In the first and second embodiments, an example was described in which the entire case 13 is integrally constructed from a light-transmitting material, and the first detection unit 11 is provided on the inner wall of the cylindrical portion 13a of the case 13. However, the case 13 may be constructed with the cylindrical portion 13a and the lid portion 13b as separate parts (see Figures 8 and 9).
[0055] The case 13 of the third embodiment includes a cylindrical portion 13a, a lid portion 13b, and an inner lid 13c. In the third embodiment, the cylindrical portion 13a, the lid portion 13b, and the inner lid 13c are constructed as separate parts. The upper part 13a1 of the cylindrical portion 13a and the lid portion 13b are made of a light-shielding material. The lower part 13a2 of the cylindrical portion 13a is made of a light-transmitting material. A projection 13a3 for holding the inner lid 13c is provided on the inner wall of the upper part 13a1 of the cylindrical portion 13a. The outer wall of the lid portion 13b is screwed into the inner wall of the upper part 13a1 of the cylindrical portion 13a. The inner lid 13c is held between the projection 13a3 on the upper part 13a1 of the cylindrical part 13a and the lower end of the lid part 13b. The first detection unit 11 is attached to the lower surface of the inner cover 13c. The first power generator 11a of the first detection unit 11 is positioned so that its light-receiving surface faces downward. The first detection unit 11 is covered by the upper part 13a1 of the cylindrical part 13a and the lid part 13b, which are made of a light-shielding material.
[0056] (Effects of covering the upper part of the first detection unit 11 with a light-shielding material) The first detection unit 11 is not exposed to direct sunlight from above. However, light that enters through the lower part 13a2 of the cylindrical portion 13a, which is made of a light-transmitting material, and is reflected from the water surface reaches the light-receiving surface of the first power generation device 11a (see the dotted arrow in Figure 9). Therefore, the first power generation device 11a can generate electricity by receiving sunlight indirectly while avoiding direct sunlight.
[0057] (Effects of constructing the cylindrical portion 13a, the lid portion 13b, and the inner lid 13c as separate components) By unscrewing the joint, the cylindrical portion 13a, the lid portion 13b, and the inner lid 13c can be separated, making maintenance of the case 13 and the first detection unit 11, as well as attaching and detaching the first detection unit 11 to the case 13, easier compared to a configuration where the case 13 is an integrated unit.
[0058] (The effect of sandwiching the inner lid 13c between the upper part 13a1 of the cylindrical part 13a and the lid part 13b) Airtight sealing between the cylindrical portion 13a and the lid portion 13b can be easily achieved.
[0059] (Example of mounting of the first detection unit 11) In the third embodiment, an example was described in which the first detection unit 11 is attached to the lower surface of the inner lid 13c. However, the inner cover 13c may be omitted, and the first detection unit 11 may be attached to the lower surface of the cover portion 13b.
[0060] (Application example 2 of Case 13, fourth embodiment) In the first to third embodiments, examples were described in which the lower surface of the case 13 is open. However, the bottom surface of case 13 may be closed, and the lower part of the side surface of case 13, which is not in contact with the bottom end of case 13, may be open (see Figure 10). In the fourth embodiment, the lower surface of the cylindrical portion 13a of case 13 is closed. In the fourth embodiment, a side opening 13a3 is formed in the lower part 13a2 of the cylindrical portion 13a of case 13, in a region that does not come into contact with the lower end of the cylindrical portion 13a. Water enters the interior of the case 13 through the side opening 13a3.
[0061] (Effects of closing the bottom of case 13 and providing a side opening 13a3) Compared to a configuration where the bottom of case 13 is open, this configuration makes it easier to prevent the intrusion of dust and other debris, and allows for a larger contact area, thus facilitating the fixing of case 13 to the fixing part 15, etc.
[0062] While several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These embodiments can be carried out in a variety of other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims and their equivalents. [Explanation of symbols]
[0063] 1. Water level measurement system 10 Measurement section 11 First detection unit 11a First power generator 11b 1st power storage device 11c First detection device 11d First communication device 12 Second detection unit 12a Second power generation device 12b 2nd power storage device 12c Second detection device 12d 2nd communication device 13 cases 13a Cylinder part 13a1 Upper part 13a2 bottom 13a3 side opening 13b Lid 13c Inner lid 15 Fixed part 30 Relay section 50. Aggregation Department 51. Communication device on the aggregation unit side 53 Control device on the aggregation unit side 55 Output device on the aggregation unit side h1 1st water level h2 2nd water level P1 internal pressure External air pressure of the P2 case Thp1 predetermined pressure threshold Thp2: A pressure threshold that fluctuates based on the external pressure of the air case.
Claims
1. A measurement unit having a first detection unit, a case, and a fixing unit, The system comprises a summarization unit having a summarization unit-side communication device and a summarization unit-side output device, The case is fixed in the area for measuring the water level, covering the first detection unit and allowing water to enter from below. The first detection unit is mounted inside the case and includes a first power generation device, a first energy storage device, a first detection device, and a first communication device. The first energy storage device stores the electricity obtained by the first power generation device, The first detection device detects information regarding the air pressure inside the case, The first detection device and the first communication device are driven based on at least one of the power obtained by the first power generation device and the power stored in the first energy storage device. The information regarding the atmospheric pressure inside the case obtained by the first detection device, or the information regarding the water level in the region calculated based on the information regarding the atmospheric pressure inside the case, is transmitted directly or indirectly from the first communication device to the aggregation unit side communication device. At least one of the first detection unit and the aggregation unit calculates information regarding the water level in the region. The output device on the aggregation unit side is a water level measurement system that outputs information regarding the water level in the area.
2. The water level measurement system according to claim 1, wherein the output device on the aggregation unit side does not output a warning when the atmospheric pressure inside the case is below a pressure threshold in a first state, outputs the warning when the atmospheric pressure inside the case is above the pressure threshold in a second state, and outputs the warning which is more urgent than in the second state when the communication device on the aggregation unit side cannot receive information from the first communication device in a third state.
3. The first power generation device has a solar panel, The first power generator, the first energy storage device, the first detection device, and the first communication device are housed in a single enclosure. The water level measurement system according to claim 1 or claim 2, wherein at least the region facing the light-receiving surface of the first power generation device in the case is made of a light-transmitting material.
4. The first power generation device has a solar panel, The aforementioned case includes a cylindrical part and a lid part. The upper part of the cylindrical portion and the lid portion are made of a light-shielding material. The lower part of the cylindrical portion is made of a light-transmitting material. The water level measurement system according to claim 1 or claim 2, wherein the first power generation device is attached to the lower surface of the lid such that the light-receiving surface of the solar panel faces downward.
5. The first power generation device has a solar panel, The case includes a cylindrical part, a lid part, and an inner lid. The cylindrical portion, the lid portion, and the inner lid are constructed as separate parts. The upper part of the cylindrical portion and the lid portion are made of a light-shielding material. The lower part of the cylindrical portion is made of a light-transmitting material. The inner lid is held between the projection on the inner wall of the cylindrical portion and the lid portion. The water level measurement system according to claim 1 or claim 2, wherein the first power generation device is mounted on the lower surface of the inner lid such that the light-receiving surface of the solar panel faces downward.
6. The water level measuring system according to claim 1, wherein the case has a closed bottom and a side opening is formed in the lower part of the side that does not come into contact with the lower end of the case.
7. A measurement unit having a first detection unit, a second detection unit, a case, and a fixing unit, The system comprises a summarization unit having a summarization unit-side communication device and a summarization unit-side output device, The case is fixed in the area for measuring the water level, covering the first detection unit and allowing water to enter from below. The first detection unit is mounted inside the case and includes a first power generation device, a first energy storage device, a first detection device, and a first communication device. The second detection unit is mounted outside the case and includes a second power generator, a second energy storage device, a second detection device, and a second communication device. The first energy storage device stores the electricity obtained by the first power generation device, The first detection device detects information regarding the air pressure inside the case, The first detection device and the first communication device are driven based on at least one of the power obtained by the first power generation device and the power stored in the first energy storage device. The second energy storage device stores the electricity obtained by the second power generation device, The second detection device detects information regarding the atmospheric pressure outside the case, The second detection device and the second communication device are driven based on at least one of the power obtained by the second power generation device and the power stored in the second energy storage device. The information regarding the air pressure inside the case obtained by the first detection device is transmitted directly or indirectly from the first communication device to the aggregation unit side communication device. The information regarding the atmospheric pressure outside the case obtained by the second detection device is transmitted directly or indirectly from the second communication device to the aggregation unit side communication device. The aggregation unit calculates information regarding the water level in the region based on information regarding the atmospheric pressure inside the case and information regarding the atmospheric pressure outside the case. The output device on the aggregation unit side is a water level measurement system that outputs information regarding the water level in the area.