KR102635188B1 - Reservoir water level monitoring system using floating type water level measuring device - Google Patents

Abstract

The present invention configures a mobile station to measure the water level using a buoyant body floating on the surface of a river, lake, reservoir, etc., and corrects the water level measured at a reference station installed on the ground nearby and transmits it to a remote server, It relates to a reservoir water level monitoring system using a floating water level measuring device that can accurately measure the water level in real time, enables efficient management of water resources, and prevents safety accidents caused by floods or floods. It floats on the water surface of the reservoir. , a mobile station that generates mobile station positioning information from satellite signals received from a GNSS satellite, and transmits the generated mobile station positioning information through short-range wireless communication; and is installed on the ground at a predetermined distance from the mobile station, generates an altitude correction value by comparing reference station positioning information generated from a satellite signal received from the GNSS satellite and the surveyed altitude of the installation location, and determines the mobile station's positioning from the mobile station. A reference station that receives information, determines the water level of the reservoir by correcting the altitude value included in the mobile station positioning information using the altitude correction value, and transmits the corrected water level information of the reservoir to a remote disaster prevention server. Includes.

Description

Reservoir water level monitoring system using a floating water level measuring device {RESERVOIR WATER LEVEL MONITORING SYSTEM USING FLOATING TYPE WATER LEVEL MEASURING DEVICE}

The present invention relates to a reservoir water level monitoring system, and more specifically, to configure a mobile station to measure the water level using a buoyant body floating on the water surface of a river, lake, reservoir, etc., and to measure the water level at a reference station installed on the ground nearby. By correcting the water level and transmitting it to a remote server, the water level of reservoirs, etc. can be accurately measured in real time, and the reservoir water level using a floating water level measuring device that enables efficient management of water resources and prevention of safety accidents caused by floods or floods. It's about a monitoring system.

In general, water levels in rivers, lakes, reservoirs, etc. are managed to efficiently use water resources and prevent damage from floods or floods. Conventionally, a method of observing the water level was used by visually checking the water level table displayed on the reservoir's water intake tower or bridge. However, there was a problem that water level observation was impossible when manpower was needed for observation and visibility was difficult due to weather or the water level table was old and difficult to identify. Additionally, in places where it was difficult to install a water level table, there was the inconvenience of having to dispatch a person to measure the water level using measuring equipment. Above all, there was a problem that it was difficult to identify rapid changes in water levels caused by natural disasters in real time.

Recently, a device that constantly floats a buoyant body on the water surface of a reservoir and monitors the water level has been used. An ultrasonic sensor is installed at the bottom of the buoyancy body or a pressure sensor connected to the bottom of the reservoir is installed to measure the water depth through ultrasonic waves or pressure sensing.

However, ultrasonic sensors have problems with accurate water depth detection due to shadow areas and errors in measured values caused by foreign substances such as water plants. Pressure-type sensors use water pressure to detect water depth, but they have a complicated installation structure, are weak against shock, and have problems with malfunctions due to solids sticking to them.

Meanwhile, the depth of water is the depth of water measured in the vertical direction from the water surface to the bottom, and the water level is the altitude of the water surface, that is, the height of the water level measured from a certain reference surface or land level starting point. Both of the above measurement methods require the process of measuring water depth and then converting it to water level. When the underwater bottom is artificially deformed due to dredging, etc., or is naturally deformed due to erosion or sedimentation, an accurate water level value is derived. There is a problem that is difficult to solve.

Republic of Korea Patent Publication No. 10-2013-0014706 Republic of Korea Patent Registration No. 10-2572739 Republic of Korea Patent Registration No. 10-2572746

The present invention constructs a mobile station that measures the water level using a buoyant body floating on the surface of the water, corrects the water level measured at a reference station installed on the ground nearby, and transmits it to a remote server, so that the water level of a reservoir, etc. can be accurately measured in real time. The purpose is to provide a reservoir water level monitoring system using a floating water level measuring device that can measure, efficiently manage water resources, and prevent safety accidents caused by floods or floods.

In addition, the present invention has another purpose in that the floating water level measuring device constituting the mobile station is easy to install and transport, can be used semi-permanently without failure, and is easy to maintain and manage the system.

A reservoir water level monitoring system using a floating water level measuring device according to an embodiment of the present invention floats on the water surface of the reservoir, generates mobile station positioning information from satellite signals received from a GNSS satellite, and transmits the generated mobile station positioning information at a short distance. A mobile station transmitting by wireless communication; and is installed on the ground at a predetermined distance from the mobile station, generates an altitude correction value by comparing reference station positioning information generated from a satellite signal received from the GNSS satellite and the surveyed altitude of the installation location, and determines the mobile station's positioning from the mobile station. A reference station that receives information, determines the water level of the reservoir by correcting the altitude value included in the mobile station positioning information using the altitude correction value, and transmits the corrected water level information of the reservoir to a remote disaster prevention server. Includes.

In the reservoir water level monitoring system using a floating water level measuring device according to another embodiment of the present invention, GNSS modules of the same standard are installed in the mobile station and the reference station, respectively.

In a reservoir water level monitoring system using a floating water level measuring device according to another embodiment of the present invention, the mobile station includes a buoyancy body having the shape of a concave bowl with an open top and an upper cover coupled to the upper end with a hole in the center; A weight that sinks to the bottom of the water by gravity; A wire winding device installed at the center of the upper surface of the upper cover and winding or unwinding the wire connected to the weight while maintaining a predetermined tension; a mobile station GNSS module that generates positioning information from signals received from the GNSS satellite; and a positioning information transmission unit that transmits the positioning information to the outside through a communication module.

A reservoir water level monitoring system using a floating water level measuring device according to another embodiment of the present invention is provided with an installation plate that divides the interior of the buoyancy body into an upper space where electrical components are installed and a lower space that forms buoyancy. In the center of each of the installation plate and the bottom of the buoyancy body, a through hole through which the wire passes along the same central axis as the through hole is formed, and the wire is vertically connected to the through hole of the installation plate and the through hole of the bottom of the buoyancy body. A wire guide that guides downward is installed.

In the reservoir water level monitoring system using a floating water level measuring device according to another embodiment of the present invention, a plurality of outlet holes are formed on the bottom of the buoyancy body, and the outlet holes block the inflow of water from the bottom to the top while maintaining the buoyancy force. A membrane check valve is installed to discharge water flowing into the lower space of the sieve to the outside.

In the reservoir water level monitoring system using a floating water level measuring device according to another embodiment of the present invention, a plurality of solar cell modules are installed on the upper surface of the upper cover to convert sunlight into electrical energy and supply it to the electricity-using components. do.

In the reservoir water level monitoring system using a floating water level measuring device according to another embodiment of the present invention, a mobile station antenna for receiving satellite signals from the GNSS satellite is installed on the upper surface of the upper cover, and at the edge of the upper cover A plurality of antenna support wires are installed to support the mobile station antenna in a fixed state.

In a reservoir water level monitoring system using a floating water level measuring device according to another embodiment of the present invention, a plurality of algae settling prevention needles that are pointed toward the top are installed on the upper surface of the upper cover.

In the reservoir water level monitoring system using a floating water level measuring device according to another embodiment of the present invention, the weight is provided with a wire connection ring at the top to which the wire is connected, and is installed on the surface of a heavy structure with an empty interior. A plurality of inlet holes communicating with the space are formed, and the internal space of the heavy structure is filled with a plurality of moisture absorbent bags containing a polymer absorbent.

According to the reservoir water level monitoring system using the floating water level measuring device of the present invention, a mobile station is configured to measure the water level using a buoyant body floating on the water surface, and the water level measured at a reference station installed on the nearby ground is corrected to remotely By transmitting to the server, the water level of reservoirs, etc. can be accurately measured in real time, which has the effect of enabling efficient management of water resources and prevention of safety accidents caused by floods or floods.

In addition, according to the present invention, the floating water level measuring device constituting the mobile station is easy to install and transport, can be used semi-permanently without failure, and is easy to maintain and manage the system.

1 is a diagram illustrating the installation state of the reservoir water level monitoring system according to the present invention;
Figure 2 is a perspective view of the floating water level measuring device constituting the mobile station in the present invention;
Figure 3 is a cross-sectional view of the floating water level measuring device according to the present invention;
Figure 4 is a perspective view of the weight in the present invention;
Figure 5 is a block diagram of a floating water level measuring device according to the present invention, and
Figure 6 is a flowchart illustrating the process of correcting water level information measured by the present invention.

Hereinafter, specific embodiments according to the present invention will be described with reference to the attached drawings. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention.

Throughout the specification, parts having similar structures and operations are given the same reference numerals. Additionally, the drawings attached to the present invention are for convenience of explanation, and the shape and relative scale may be exaggerated or omitted.

In describing the embodiments in detail, redundant descriptions or descriptions of techniques that are obvious in the field have been omitted. Additionally, in the following description, when a part is said to “include” other components, this means that it may include additional components in addition to the components described, unless specifically stated to the contrary.

In addition, terms such as "unit", "unit", and "module" used in the specification refer to a unit that processes at least one function or operation, which may be implemented through hardware or software or a combination of hardware and software. You can. Additionally, when a part is said to be electrically connected to another part, this includes not only the case where it is directly connected, but also the case where it is connected with another component in between.

Terms containing ordinal numbers, such as first, second, etc., may be used to describe various components, but the components are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, the second component may be referred to as the first component without departing from the scope of the present invention, and similarly, the first component may also be referred to as the second component.

Figure 1 is a diagram illustrating the installation state of the reservoir water level monitoring system according to the present invention. First, the reservoir water level monitoring system of the present invention will be briefly described with reference to FIG. 1.

The reservoir water level monitoring system of the present invention includes a mobile station 100, which is a floating water level measuring device that always floats on the water surface of a river, lake, reservoir, etc., and a reference station 200 installed on the ground near the mobile station 100. It is a device that automatically measures the water level using a navigation system (GNSS: Global Navigation Satellite System) and corrects the measured water level to measure the accurate water level in real time. GNSS modules of the same standard are installed in both the mobile station 100 and the reference station 200.

In the present invention, the floating water level measuring device is installed on the upper surface of the buoyancy body 110 floating on the water, a weight 170 that sinks to the bottom of the water by gravity, and a weight ( It consists of a wire winding device 140 that winds or unwinds the wire connected to 170) while maintaining a predetermined tension. A mobile station GNSS module 180, which will be described later with reference to FIG. 5, is installed in the internal space of the buoyant body 110, and a mobile station antenna 150 for receiving satellite signals from the GNSS satellite 300 is installed on the upper surface of the buoyant body 110. is stated.

The reference station 200 is composed of a reference station data collection device 220, a solar panel 230, and a reference station antenna 240 installed on the top of a pole 210 installed on the ground. Inside the reference station data collection device 220, a reference station GNSS module 280, which will be described later with reference to FIG. 5, is installed. The solar panel 230 converts sunlight into electrical energy and stores it, and supplies operating power to electrical components within the reference station data collection device 220. The reference station antenna 240 receives satellite signals from the GNSS satellite 300.

The floating water level measuring device constituting the mobile station 100 can be positioned in a floating state within a certain radius within the reservoir with the weight 170 acting as an anchor. As is commonly known, positioning information can be extracted from satellite signals received by the GNSS module of the mobile station 100, and this positioning information is a value corresponding to the latitude, longitude, and altitude where the floating water level measuring device is currently located on Earth. .

The GNSS module shows an error of approximately several meters to tens of meters, but the radius of the reservoir is very large compared to this error range, and the water level is the same no matter where the measurement is made at any point in the reservoir, so the measurement errors in latitude and longitude can be ignored. However, if the water level of the reservoir is measured incorrectly due to altitude error, the storage amount is misjudged, making efficient use and management of water resources impossible, and it is difficult to prevent damage from flooding. Therefore, it is necessary to correct the altitude error using a reference station equipped with the same GNSS navigation system as shown in Figure 1.

The GNSS module of the mobile station 100 and the GNSS module of the reference station 200 are installed from the same manufacturer and have the same specifications. If the reference station 200 is installed on the ground close to the mobile station 100, the errors occurring in the two GNSS modules are within an approximate range. Since the reference station 200 is fixed and installed, the actual altitude of the reference station 200 can be accurately known through surveying. The reference station 200 generates an altitude correction value by comparing the measured altitude value of the positioning information measured by the GNSS module with the actual altitude value of the installation location. Additionally, GNSS positioning information at the same time measured by the GNSS module of the mobile station 100 can be collected, the altitude value of the mobile station 100 can be corrected using the altitude correction value, and the current water level of the reservoir can be determined. The determined water level value can be transmitted in real time to a disaster prevention server, etc.

Figure 2 is a perspective view of the floating water level measuring device constituting the mobile station in the present invention, Figure 3 is a cross-sectional view of the floating water level measuring device according to the present invention, and Figure 4 is a perspective view of the weight in the present invention. The floating water level measuring device of the present invention provides a structure for a floating water level measuring device that is easy to maintain, transport, and install. Referring to Figures 2 to 4, the configuration and operation of the floating water level measuring device according to the present invention will be described in more detail.

Referring to Figures 2 and 3, the buoyancy body 110 of the mobile station 100 has the shape of a hollow bowl with an open top so that it floats on the water surface. An upper cover 120 having a hole 122 in the center is coupled to the upper end of the buoyancy body 110.

A wire winding device 140 is installed at the center of the upper surface of the upper cover 120 to wind the wire 160 connected to the weight 170. A winding device fixing bracket 142 is fixedly installed around the through hole 122 of the upper cover 120, and the wire winding device 140 is coupled and fixed to the winding device fixing bracket 142. The wire winding device 140 is configured to include a tension adjusting device that winds or unwinds the wire 160 to keep it taut at a predetermined tension. In this way, by installing the wire winding device 140 on the upper surface of the upper cover 120, it is possible to prevent the wire winding device 140 from becoming inoperable due to aquatic plants, etc. being caught on the winding reel.

In the present invention, the length of the wire 160 is unrelated to the water level measurement value and is only used to prevent the buoyancy body 110 from deviating outside a predetermined radius around the weight 170. For example, when the tension of the wire 160 is released, the water level measurement function may be lost due to the buoyancy body 110 drifting and moving to the end of the reservoir and rising to the ground. Tension is maintained to a certain degree so that the buoyancy body 110 always remains floating in the reservoir.

The internal space of the buoyancy body 110 is divided into an upper space where electrical components are installed and a lower space where buoyancy is created. As shown in FIG. 3, an installation plate 112 is provided at the waist portion of the buoyancy body 110 in the form of a partition dividing the upper space and the lower space.

A hollow printed circuit board 116 is installed on the upper surface of the installation plate 112. Control circuits for controlling electrical components, for example, circuit elements such as resistors, coils, and capacitors, are printed on the printed circuit board 116. Of course, the electrical components may be modularized and installed on the installation plate 112.

A through hole is formed in the center of each of the bottom surfaces of the installation plate 112 and the buoyancy body 110 with the same central axis as the through hole 122 of the upper cover 120. And the first wire guide 114 is installed in the through hole of the installation plate 112, and the second wire guide 118 is installed in the through hole of the buoyancy body 110.

The first wire guide 114 and the second wire guide 118 guide the wire 160 vertically downward. Preferably, the first wire guide 114 and the second wire guide 118 have a two-point bearing structure in rolling contact with the outer peripheral surface of the wire 160 and the inner peripheral surface of the through hole, respectively, so that the lower part of the buoyancy body 110 Prevent water from entering as much as possible.

In addition, a plurality of outlet holes 115 are formed on the bottom of the buoyancy body 110, and a membrane check valve 117 is installed in these outlet holes 115 to discharge water to the outside but block it from flowing inside. You can. Therefore, as shown, a sufficient cavity 119 for forming buoyancy can be formed in the lower space of the buoyancy body 110 partitioned by the installation plate 112, and the buoyancy body 110 is formed by this cavity 119. ) It is possible to protect electrical components by preventing moisture from entering the upper space inside the buoyancy body 110 while maintaining the buoyancy.

Referring to FIG. 2, a plurality of solar cell modules 124 are installed on the upper surface of the upper cover 120. The solar cell module 124 converts sunlight into electrical energy and supplies it as a power source for electrical components.

In addition, a mobile station antenna 150 for receiving satellite signals from the GNSS satellite 300 is installed on the upper surface of the upper cover 120. In order to prevent the mobile station antenna 150 from falling over due to wind or external force, a plurality of antenna support wires 152 are installed at the edge of the upper cover 120 to support the mobile station antenna 150 in a fixed state.

Meanwhile, if several birds sit on the floating water level measuring device or bird droppings may interfere with charging of the solar cell module 124. Therefore, in order to prevent this, a plurality of bird landing prevention needles 126 that are formed sharply toward the top are installed on the upper surface of the upper cover 120.

Referring to FIG. 4, the weight 170 has the form of a heavy structure having a wire connection ring 172 to which a wire 160 is connected at the top. For example, the weight 170 is composed of a hexahedron with a trapezoidal cross-section. Here, the heavy structure constituting the weight 170 is hollow on the inside, and a plurality of inlet holes 174 communicating with the internal space are formed on the surface. And the inside of the heavy structure is filled with a filler that absorbs water.

For example, the filling may be a cotton ball. Preferably, the filler may be a desiccant bag containing a polymeric absorbent. A polymer absorbent is a highly absorbent polymer resin made from acrylic acid polymer or polyvinyl alcohol, and absorbs about 1,000 times its volume of water. Therefore, before submerging the weight 170 into the reservoir, since the weight 170 is relatively light, move the floating water level measuring device to the center of the reservoir using a rubber boat, etc., and then drop the weight 170 into the reservoir. You can install a measuring device by doing this. That is, according to the present invention, it is easy to transport and install the floating water level measuring device, and it is possible to prevent an accident in which the rubber boat capsizes in the process of dropping the weight 170 to the bottom of the reservoir.

Figure 5 is a block diagram of a floating water level measuring device according to the present invention, and Figure 6 is a flow chart illustrating a process for correcting water level information measured by the present invention. 5 and 6, the process of transmitting measured water level information to a remote disaster prevention server using the present invention will be described.

Referring to FIG. 5, the mobile station 100 includes a mobile station GNSS module 180, a power supply unit 182, a control unit 184, a positioning information transmission unit 186, and a short-range wireless communication module 188.

The mobile station GNSS module 180 receives satellite signals from the GNSS satellite 300 and generates current positioning information of the mobile station 100. For example, latitude, longitude, and altitude values corresponding to the current location of the mobile station 100 are generated. The power unit 182 includes a storage battery that stores electrical energy generated by the solar cell module 124, a charging circuit, and a power supply circuit, and supplies operating power to device components.

The short-range wireless communication module 188 is a means of communicating with the reference station 200 using an RF (Radio Frequency) signal in the tens of kHz band. The positioning information transmission unit 186 transmits the positioning information measured by the mobile station GNSS module 180 to the reference station 200. The control unit 184 switches and operates the mobile station GNSS module 180 at predetermined operation cycles (eg, 1 minute) and controls the positioning information transmitter 186 and device components.

The reference station 200 includes a reference station GNSS module 280, a power supply unit 282, a control unit 284, a positioning information transmitting and receiving unit 286, a short-range wireless communication module 288, and a broadband mobile communication module ( 290).

The reference station GNSS module 280 receives satellite signals from the GNSS satellite 300 and generates current positioning information of the reference station 200. For example, latitude, longitude, and altitude values corresponding to the current location of the reference station 200 are generated. The power supply unit 282 includes a storage battery that stores electrical energy generated by the solar panel 230, a charging circuit, and a power supply circuit, and supplies operating power to device components.

The short-range wireless communication module 288 is a means of communicating with the mobile station 100 using an RF (Radio Frequency) signal in the same frequency band as that of the mobile station 100. The broadband mobile communication module 290 is a means for communicating with the remote disaster prevention server 400 through a broadband mobile communication network such as CDMA (Code Division Multiple Access), LTE (Long Term Evolution), and 5G. The positioning information transmitting and receiving unit 286 receives the positioning information of the mobile station from the mobile station 100 and transmits its own positioning information and the corrected water level information of the mobile station 100 to the disaster prevention server 400. The control unit 284 switches and operates the reference station GNSS module 280 every predetermined operation period (the same operation period synchronized with the mobile station 100, for example, 1 minute), and the positioning information transceiver 286 and the device. It is a means of controlling components.

In FIG. 5, the disaster prevention server 400 is a server that collects disaster prevention information from various disaster prevention information generation terminals and disaster prevention information collection data processing units. Disaster prevention information includes water level information of rivers, lakes, and reservoirs. The collected disaster prevention information is stored and managed in the disaster prevention information database server 500.

The disaster prevention server 400 can monitor the water levels of reservoirs in real time from the collected disaster prevention information and determine whether to release water from the dam. In addition, the disaster prevention server 400 can predict river flooding risk areas and disaster situations accordingly when the water level of the reservoir reaches a dangerous level. In the event of high-risk flooding, the disaster prevention server 400 shares flood risk area and disaster situation information with the disaster management server 600, such as the traffic control server, the National Police Agency server, and the Fire Department server, and immediately controls traffic or dispatches an ambulance. You may also request .

Referring to FIG. 6, the process of correcting the measured water level value of the reservoir using the reference station 200 in the present invention will be described.

The control unit 284 of the reference station 200 may include a processor and memory. The processor may consist of a single core processor or a multi-core processor. Memory stores computer-readable instructions for performing a process. The processor calls the memory and performs the water level information correction process of the mobile station as shown in FIG. 6 according to a predetermined order. Each step described below is a process executed by a processor.

First, positioning information of the reference station 200 is received from the reference station GNSS module 280 (ST110). The positioning information of the reference station 200 includes latitude, longitude, and altitude information where the reference station 200 is currently located. Meanwhile, the reference station 200 is a structure fixedly installed on the ground, and the latitude, longitude, and altitude values corresponding to the actual location of the reference station 200 are stored in memory.

Next, an altitude correction value is generated by comparing the actual altitude value of the reference station 200 and the measured altitude value included in the GNSS positioning information (ST120). Then, GNSS positioning information of the mobile station 100 measured at the same time as that of the reference station 200 is collected (ST130).

The measured altitude value included in the GNSS positioning information of the mobile station 100 is a value representing the water level of the mobile station. If the reference surface of the measured altitude value and the land level starting point indicating the water level of the reservoir are different, the measured altitude value can be corrected to the altitude value of the land level starting point.

Next, the water level of the mobile station 100 is determined using the altitude correction value generated in step ST120 (ST140). Finally, the mobile station positioning information and the corrected water level information of the mobile station are transmitted to the disaster prevention server 400 (ST150).

The invention disclosed above can be modified in various ways without damaging the basic idea. In other words, all of the above embodiments should be interpreted as illustrative and not limited. Therefore, the scope of protection of the present invention should be determined based on the attached claims, not the above-described embodiments, and if the components defined in the attached claims are replaced with equivalents, this should be considered to fall within the scope of protection of the present invention.

100: mobile station 110: buoyancy body
112: Installation plate 114: First wire guide
115: outlet hole 116: printed circuit board
117: Membrane check valve 118: Second wire guide
119: cavity 120: upper cover
122: hole 124: solar cell module
126: Bird settling prevention needle 140: Wire winding device
142: Winding device fixing bracket 150: Mobile station antenna
152: antenna fixing wire 160: wire
170: Weight 172: Wire connection ring
174: inlet hole 176: filling material
180: Mobile station GNSS module 182: Power supply unit
184: Control unit 186: Positioning information transmission unit
188: short-range wireless communication module 200: reference station
210: Pole 220: Reference station data collection device
230: solar panel 240: reference station antenna
280: Reference station GNSS module 282: Power supply unit
284: Control unit 286: Positioning information transmitting and receiving unit
288: short-range wireless communication module 290: broadband mobile communication module
300: GNSS satellite 400: Disaster prevention server
500: Disaster prevention information database server
600: Disaster management server

Claims (9)

A mobile station floating on the water surface of a reservoir, generating mobile station positioning information from satellite signals received from a GNSS satellite, and transmitting the generated mobile station positioning information through short-distance wireless communication; and
It is installed on the ground at a predetermined distance from the mobile station, and generates an altitude correction value by comparing the measurement altitude of the installation location with the reference station positioning information generated from the satellite signal received from the GNSS satellite, and the mobile station positioning information from the mobile station. A reference station that receives, determines the water level of the reservoir by correcting the altitude value included in the mobile station positioning information using the altitude correction value, and transmits the corrected water level information of the reservoir to a remote disaster prevention server.
Includes,
The mobile station is,
A buoyancy body having the shape of a recessed bowl with an open top and an upper cover having a hole in the center coupled to the upper end;
A weight that sinks to the bottom of the water by gravity;
A wire winding device installed at the center of the upper surface of the upper cover and winding or unwinding the wire connected to the weight while maintaining a predetermined tension;
a mobile station GNSS module that generates positioning information from signals received from the GNSS satellite; and
Positioning information transmission unit that transmits the positioning information to the outside through a communication module
Includes,
A plurality of solar cell modules are installed on the upper surface of the upper cover to convert sunlight into electrical energy and supply it to electricity-using components, and a plurality of bird landing prevention needles are formed sharply toward the top,
The weight has a wire connection ring to which the wire is connected at the top, and a plurality of inlet holes communicating with the internal space are formed on the surface of the heavy structure with an empty interior, and the internal space of the heavy structure accommodates a polymer absorbent. A reservoir water level monitoring system using a floating water level measuring device consisting of a plurality of desiccant bags filled with water.
According to paragraph 1,
A reservoir water level monitoring system using a floating water level measuring device in which GNSS modules of the same standard are installed in the mobile station and the reference station.
delete According to paragraph 1,
An installation plate is provided inside the buoyancy body to divide it into an upper space where the electrical components are installed and a lower space to form buoyancy, and at the center of each of the installation plate and the bottom of the buoyancy body is a central axis identical to the through hole. A through hole through which the wire passes is formed, and a wire guide for guiding the wire vertically downward is installed in the through hole of the installation plate and the through hole of the bottom of the buoyant body. A reservoir water level monitoring system using a floating water level measuring device.
According to clause 4,
A plurality of outlet holes are formed on the bottom of the buoyancy body, and the outlet holes are equipped with a membrane check valve that blocks the inflow of water from the bottom to the top and discharges water flowing into the lower space of the buoyancy body to the outside. Reservoir water level monitoring system using a water level measuring device.
delete According to paragraph 1,
A mobile station antenna for receiving satellite signals from the GNSS satellite is installed on the upper surface of the upper cover, and a plurality of antenna support wires are installed at the edge of the upper cover to support the mobile station antenna in a fixed state. Floating water level measurement Reservoir water level monitoring system using a device.
delete delete

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