KR20210142021A - Disaster prevention management system using smart manhole cover - Google Patents

Abstract

The present invention relates to a disaster prevention management system using a smart manhole cover, which can detect signs of damage to the manhole cover and quickly maintain and repair the same and can maintain the level of sewage, manage flooded areas in response to rainfall, and previously predict sinkholes on the road. The disaster prevention management system comprises: the smart manhole cover for covering the manhole formed on the road, measuring information on disaster prevention at the location where the manhole is installed, and transmitting the same in a short-range wireless communication manner; a disaster prevention information collection pole for collecting disaster prevention information from the smart manhole cover and remotely transmitting the collected disaster prevention information in a broadband mobile communication manner; a disaster prevention server for receiving the disaster prevention information from the disaster prevention information collection pole and managing disaster prevention on a downtown area; and a disaster prevention information database server for storing and managing the disaster prevention information. Therefore, the disaster prevention management system can measure the displacement of the manhole cover and remotely manage the same to signs of damage to the manhole cover and maintain and repair the same, thereby preventing vehicle accidents or the like, preventing the overflow of sewage in the manhole, and previously managing flood management in response to rainfall, and can previously predict sinkhole risk areas when a small displacement is detected in multiple manholes, thereby preventing accidents caused by sinkholes.

Description

Disaster prevention management system using smart manhole cover {DISASTER PREVENTION MANAGEMENT SYSTEM USING SMART MANHOLE COVER}

The present invention relates to a disaster prevention management system, and more particularly, to detect a symptom of damage to a manhole cover and perform maintenance promptly, as well as managing the level of sewage, managing a flooded area corresponding to the amount of rain, and a road It relates to a disaster prevention management system using a smart manhole cover that can perform sinkhole prediction in advance.

In general, a manhole is installed at a predetermined depth on a road for management and inspection of underground facilities and sewage pipes. A manhole is a vertical hole with a diameter of approximately 1-1.2m, and the bottom surface is the same as the conduit for the distribution of sewage, or it is lowered to a lower height (approximately 1m depth) than the conduit to accommodate the sediment. A cover is installed on the top of the manhole to cover the hole. Manhole covers are made of cast iron or reinforced concrete to prevent damage by vehicles moving on the ground.

However, as the load and vibration applied to the manhole cover are repeated on a road with heavy traffic, the case where the manhole cover is damaged frequently occurs. In addition, there are cases in which the manhole cover is damaged in large-scale construction sites where heavy special vehicles frequently move.

Damage to the manhole cover can cause a vehicle accident, so it must be detected early and repaired promptly.

On the other hand, Japanese Patent Registration No. 6547068 proposes a manhole monitoring system for preventing manhole theft and accidents caused by natural phenomena. Referring to the prior literature, an acceleration sensor, a temperature sensor, an odor sensor, a water quality sensor, a substrate sensor, a flow sensor, and a water level sensor are installed in the manhole and the state of the manhole is remotely monitored.

However, the prior literature senses the open/closed state of the manhole and determines the state of the manhole, which has a problem in that it is only a follow-up response in a way that detects after the manhole cover is already lost or completely damaged.

Japanese Patent Registration No. 6547068

The present invention detects the displacement information of the manhole cover and can predict the precursor symptoms before the manhole cover is lost or completely damaged, and the smart manhole that can prevent a vehicle accident in advance by quickly maintaining the predicted damage to the manhole cover An object of the present invention is to provide a disaster prevention management system using a cover.

In addition, the present invention can easily construct a water level sensor that detects the level of sewage in the manhole and prevent the occurrence of erroneous measurement due to foreign substances. Another object is to provide a disaster prevention management system using a smart manhole cover that can efficiently perform flood management for the area where the manhole is located.

In addition, the present invention precisely measures the displacement of the manhole cover and predicts the area as a sinkhole danger area when three or more manhole cover displacements within a predetermined radius exceed the sinkhole prediction reference value. Another object is to provide a disaster prevention management system using a smart manhole cover to prevent accidents in advance.

In addition, the present invention uses a reference pole and a spherical reflector in a disaster prevention information collection pole installed on a slope of a mountain or road among disaster prevention information collection poles that relay disaster prevention information transmitted from a manhole cover. Another object is to provide a disaster prevention management system using a smart manhole cover that can recognize in advance a precursor phenomenon such as a landslide by managing it with disaster prevention information.

Disaster prevention management system using a smart manhole cover according to an embodiment of the present invention, a smart manhole cover that covers the manhole formed on the road and measures the disaster prevention information of the place where the manhole is installed and transmits it in a short-distance wireless communication method; a disaster prevention information collection pole that collects disaster prevention information from the smart manhole cover and remotely transmits the collected disaster prevention information using a broadband mobile communication method; a disaster prevention server that receives the disaster prevention information from the disaster prevention information collection poll and performs disaster prevention management in a downtown area; and a disaster prevention information database server that stores and manages the disaster prevention information.

Disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the smart manhole cover, a displacement sensor for detecting the displacement of the ground surface on which the smart manhole cover is installed; a control unit for generating manhole index displacement information indicating the amount of change in the position of the smart manhole cover from the detection value of the displacement sensor; and a disaster prevention information transmitter for transmitting disaster prevention information including the manhole surface displacement information to the disaster prevention information collection pole.

In the disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the displacement sensor is composed of a three-axis angular velocity sensor in which the X-axis and the Y-axis are parallel to the ground surface and the Z-axis is installed at a right angle. a second gyro sensor comprising a first gyro sensor and a three-axis angular velocity sensor having a Z-axis parallel to the ground surface, wherein the controller includes an X-axis rotation angle and a Y-axis rotation angle of the first gyro sensor and the The manhole surface displacement information is generated using the Z-axis rotation angle of the second gyro sensor.

Disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the smart manhole cover further comprises a vibration sensor for detecting the vibration of the smart manhole cover, the control unit from the detection value of the vibration sensor It generates manhole vibration amount information indicating the amount of vibration applied to the smart manhole cover, and the disaster prevention information transmitter transmits disaster prevention information further including the manhole vibration amount information to the disaster prevention information collection pole.

In the disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the disaster prevention server determines whether the smart manhole cover is damaged by combining the manhole index displacement information and the manhole vibration amount information, and It includes a manhole damage determination unit that generates a traffic control command to control traffic around the determined smart manhole cover.

In the disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the disaster prevention server includes the manhole index displacement information received from three or more smart manhole covers located within a predetermined radius. and a sinkhole prediction unit that determines the area surrounded by the smart manhole cover, in which the manhole index displacement information exceeds the sinkhole prediction reference value, as a sinkhole occurrence risk area when it exceeds.

Disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the smart manhole cover further comprises a water level sensor for detecting the level of sewage in the manhole, the control unit from the detection value of the water level sensor Manhole level information indicating the level of the sewage is generated, and the disaster prevention information transmitter transmits the disaster prevention information further including the manhole water level information to the disaster prevention information collection pole.

Disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the water level sensor is installed in the lower part of the manhole, the base is printed so that the ground electrode is exposed, and different heights from the base to the upper part a first sensing substrate printed to expose a plurality of water level electrodes; and electrode pads connected to the ground electrode and the water level electrode of the first sensing substrate are patterned to be insulated from each other on the top of the back surface of the manhole, and have a plurality of heights different from each other from the bottom to the top on the front surface. A second sensing substrate is printed to expose the water level electrode of the , and the uppermost portion of the front surface includes a second sensing substrate patterned to insulate electrode pads connected to the water level electrodes of the front surface from each other.

In the disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the water level electrode and the electrode line connected to the water level electrode rise from the bottom to the top on the first sensing substrate and the second sensing substrate, respectively They are alternately arranged along the outermost line on one side and the outermost line on the other side.

In the disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the water level electrode includes a plurality of first water level electrodes disposed at a first height difference from a base on the first sensing substrate, and the first sensing substrate and a plurality of second water level electrodes disposed with a second height difference smaller than the first height difference across the second sensing substrate, and a plurality of second water level electrodes disposed on the second sensing substrate with a third height difference smaller than the second height difference. Consists of a third water level electrode.

In the disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, when the manhole water level information received from the smart manhole cover exceeds a predetermined reference value, the disaster prevention server determines the area where the smart manhole cover is located It includes a submerged area diagnosis unit that determines that it is a flooded area.

In the disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the disaster prevention information collection pole includes a rainfall meter that measures the amount of rainfall, and generates rainfall information from the measurement data of the rainfall meter and transmits it to the disaster prevention server and a rainfall information generator that increases or decreases a reference value for determining a flooded area according to the rainfall information.

The disaster prevention management system using a smart manhole cover according to another embodiment of the present invention further includes a reference pole installed at a location spaced apart from the disaster prevention information collection pole by a predetermined distance and having a spherical reflector at a predetermined height, the disaster prevention The information collection pole may include: a laser distance meter for emitting laser light directed at the spherical reflector and measuring a distance to a light reflective contact point of the spherical reflector by recognizing the light reflected from the spherical reflector; a laser driver for operating a laser beam transmitter and a laser beam receiver of the laser distance meter; a signal detecting unit for digitally sampling the optical signal received from the laser light receiving unit; a comparison unit that compares the signal detected by the signal detection unit with a predetermined preset value; and a displacement micro-variation recognizing unit that generates the surface displacement micro-variation signal from the output signal of the comparator and transmits it to the disaster prevention server.

Disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the disaster prevention information collection pole further includes a timing controller for controlling the operation period of the laser driver.

In the disaster prevention management system using a smart manhole cover according to another embodiment of the present invention, the displacement micro-variation recognizing unit sets the preset value by calculating an average value from a plurality of distance measurements during the initial operation of the laser distance meter, , when the current distance measurement value measured by the laser range finder is out of the allowable error range of the preset value, the surface displacement micro-variation signal is generated.

According to the disaster prevention management system using the smart manhole cover of the present invention, by measuring the displacement of the manhole cover and managing it remotely, it is possible to detect a symptom of damage to the manhole cover and quickly maintain it to prevent a vehicle accident, etc., and sewage in the manhole It is possible to prevent flooding and preemptively manage flooding in response to rainwater, and if a slight displacement is detected in multiple manholes, it can be predicted in advance as a sinkhole hazard area to prevent safety accidents caused by sinkholes in advance. there is an effect

1 is a block diagram illustrating a disaster prevention management system using a smart manhole cover according to the present invention;
2 is a cross-sectional view showing an example in which the smart manhole cover of the present invention is installed;
3 is a front view illustrating a first sensing substrate constituting the water level sensor of the present invention;
4 is a rear view illustrating a second sensing substrate constituting the water level sensor of the present invention;
5 is a front view illustrating a second sensing substrate constituting the water level sensor of the present invention;
6 is a block diagram showing a configuration example of a smart manhole cover in the present invention;
7 is a diagram conceptually depicting an example of measuring the inclined surface fine displacement of the disaster prevention information collection pole in the present invention;
8 is a block diagram showing a configuration example of a disaster prevention information collection pole in the present invention;
9 is a flowchart illustrating the process of measuring the fine displacement of the disaster prevention information collection pole in the present invention, and
10 is a diagram illustrating a process in which the disaster prevention server predicts a sinkhole area in the present invention.

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

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

In describing the embodiments in detail, overlapping descriptions or descriptions of obvious techniques in the art are omitted. In addition, when a certain part "includes" other components in the following description, it means that other components may be further included in addition to the described components unless otherwise stated.

In addition, terms such as "~ unit", "~ group", and "~ module" described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. can In addition, when it is said that a certain part is electrically connected to another part, this includes not only a case in which it is directly connected, but also a case in which it is connected through another configuration in the middle.

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

1 is a block diagram illustrating a disaster prevention management system using a smart manhole cover according to the present invention.

Referring to FIG. 1 , the disaster prevention management system using the smart manhole cover of the present invention includes a smart manhole cover 100 , a disaster prevention information collection pole 200 , a disaster prevention server 400 , and a disaster prevention information database server 500 . is composed

The smart manhole cover 100 is a device for covering the manhole 600 formed on the road, and measures disaster prevention information of the location where the manhole 600 is installed and transmits the information in a short-range wireless communication method. The smart manhole cover 100 is a means to be installed at a plurality of points on the road, and is formed in a circular or oval shape that is installed parallel to the ground surface. If many smart manhole covers 100 try to transmit disaster prevention information in a broadband mobile communication method, the manufacturing cost and installation cost of the manhole cover are considerable, and the data communication fee is very large, so it is inefficient. Therefore, in the present invention, the disaster prevention information generated by the smart manhole cover 100 is collected and relayed by the disaster prevention information collection pole 200 is adopted.

The smart manhole cover 100 is a structure installed on a road through which a vehicle passes, and it is not easy to inspect by dispatching a person. Therefore, in the present invention, the disaster prevention information generated by the smart manhole cover 100 is limited to manhole surface displacement information, manhole vibration amount information, and manhole water level information, and using this information, whether the manhole cover is damaged, whether there is a risk of overflow of sewage, Perform sinkhole prediction. The structure and configuration of the smart manhole cover 100 and disaster prevention information generated by the smart manhole cover 100 will be described in detail later with reference to FIGS. 2 to 6 .

The disaster prevention information collection pole 200 collects disaster prevention information from the smart manhole cover 100 in a short-range wireless communication method and remotely transmits the collected disaster prevention information to the disaster prevention server 400 in a broadband mobile communication method. In the present invention, the disaster prevention information collection pole 200 serves not only to simply collect information, but also to generate some of the disaster prevention information. As will be described later with reference to FIGS. 7 to 9 , the disaster prevention information collection pole 200 generates rainfall information and surface displacement micro change information of the slope and transmits the generated information to the disaster prevention server 400 .

The disaster prevention server 400 receives disaster prevention information from the disaster prevention information collection poll 200 through the broadband mobile communication network 300 . In this embodiment, the disaster prevention information includes manhole surface displacement information generated from the smart manhole cover 100, manhole vibration amount information, manhole level information, and rainfall information generated from the disaster prevention information collection pole 400, fine fluctuations in the surface displacement of the slope. it is information The received disaster prevention information is stored and managed in the disaster prevention information database server 500 .

Referring to FIG. 1 , the disaster prevention server 400 includes a manhole damage determination unit 410 , a flooded area diagnosis unit 420 , and a sinkhole prediction unit 430 .

The manhole damage determination unit 410 may determine whether the smart manhole cover 100 is damaged from the manhole index displacement information. For example, when the displacement of any one smart manhole cover 100 is detected significantly compared to other smart manhole covers 100 among the smart manhole covers 100 within a predetermined radius, the corresponding smart manhole cover 100 is damaged can be decided As another example, it may be determined whether the smart manhole cover 100 is damaged by combining the manhole index displacement information and the manhole vibration amount information. Manhole damage determination unit 410 may generate a traffic control command for controlling traffic around the smart manhole cover 100 determined to be damaged.

The submerged area diagnosis unit 420 may diagnose the area in which the smart manhole cover 100 is located as the flooded area when the manhole water level information received from the smart manhole cover 100 exceeds a predetermined reference value. For example, an area where there is a risk of sewage overflow due to clogging of a sewage pipe may be determined as a flooded area regardless of rainfall. The flooded area diagnosis unit 420 may diagnose the flooded area by combining the rainfall information received from the disaster prevention information collection pole 200 and the manhole water level information received from the smart manhole cover 100 . Preferably, the submerged area diagnosis unit 420 may lower the reference value for determining the flooded area as the amount of rainfall included in the rainfall information increases, and adjust the reference value for determining the flooded area higher as the amount of rainfall decreases.

The sinkhole prediction unit 430 determines that the manhole surface displacement information received from three or more smart manhole covers 100 among the smart manhole covers 100 located within a predetermined radius is a predetermined reference value (a reference value lower than a reference value for determining manhole damage) ) is exceeded, the area surrounded by the smart manhole cover 100 that appears to have exceeded the standard value is determined as a sinkhole occurrence risk area. The details will be described later with reference to FIG. 10 .

2 is a cross-sectional view showing an example in which the smart manhole cover of the present invention is installed, FIG. 3 is a front view illustrating a first sensing substrate constituting the water level sensor of the present invention, and FIG. 4 is a water level sensor constituting the water level sensor of the present invention It is a rear view illustrating a second sensing substrate, FIG. 5 is a front view illustrating a second sensing substrate constituting the water level sensor of the present invention, and FIG. 6 is a block diagram showing a configuration example of a smart manhole cover in the present invention.

Referring to FIG. 2 , the smart manhole cover 100 is installed to cover the upper opening of the manhole 600 . The uppermost cover 110 installed parallel to the ground surface is formed of a tempered glass material. A photovoltaic panel 120 for receiving sunlight is installed on a lower surface of the cover 110 , and a displacement sensor 130 and a photovoltaic cell module 140 are installed under the photovoltaic panel 120 .

The displacement sensor 130 is a means for detecting the displacement of the ground surface on which the smart manhole cover 100 is installed. Preferably, the displacement sensor 130 includes a cover 110 , that is, a first gyro sensor comprising a three-axis angular velocity sensor in which X and Y axes are parallel to the ground surface and the Z axis is installed at right angles to the cover 110 , and the cover 110 . ) is composed of a module including a second gyro sensor composed of a three-axis angular velocity sensor installed in parallel with the Z axis.

The first gyro sensor extracts the rotation angles of the X-axis and Y-axis of the cover 110 by integrating with time, and may measure the horizontal displacement of the cover 110 from this value. However, if a cumulative integration error occurs due to long-term use, the rotation angle of the Z-axis perpendicular to the cover 110 may converge to zero. By correcting the error, it is possible to measure the displacement of the cover 110 with high precision.

Referring to FIG. 2 , the water level sensor 150 detects the water level of the sewage 620 in the manhole 600 . In the present invention, the water level sensor 150 has a structure in which the first sensing substrate 160 and the second sensing substrate 180 are connected, and the electrodes for measuring the water level are the first sensing substrate 160 and the second sensing substrate. 180 is printed to expose it. The first sensing substrate 160 and the second sensing substrate 180 are installed to be in close contact with the inner wall of the manhole 600 . The signal line 190 drawn out from the second sensing substrate 180 is connected to the cover 110 , so that the water level detection signal is transmitted to the substrate in the cover 110 .

The first sensing substrate 160 is a substrate for detecting a depth of 100 cm to 50 cm of sewage, and the second sensing substrate 180 is a means for detecting a depth of 50 cm to 0 cm (full water level) of the sewage. Separating and installing the water level sensor 150 into two substrates makes it possible to design a narrow substrate width while forming a plurality of water level electrodes on the sensing substrates, thereby lowering manufacturing cost and installation cost and increasing mass productivity.

Referring to FIG. 3 , the first sensing substrate 160 is a substrate installed under the manhole 600 , printed so as to expose the ground electrode 170 , and has a plurality of heights at different heights from the bottom to the top. The water level electrodes 190a, 190b, 190c, 190d, 190e, and 196a are printed to be exposed.

On the uppermost portion of the first sensing substrate 160, electrode pads connected to the ground electrode 170 and the water level electrodes 190a, 190b, 190c, 190d, 190e, and 196a through an electrode line and insulated from each other are disposed to arrange the first electrode A connection portion 162 is formed.

A text indicating a water depth of 100 cm is printed on the base of the first sensing substrate 160 , and installation holes 172 are formed at predetermined intervals in an area where the electrode is not printed on the central portion. Therefore, the installation worker places the 100 cm mark of the first sensing board 160 at the base and fastens screws through the installation hole 172 to easily attach the first sensing board 160 to the wall inside the manhole 600 . It can be installed to fit snugly.

The ground electrode 170 is connected to the outermost electrode pads on both sides of the first electrode connection part 162 through the first sensing substrate 160 . In addition, the first water level electrodes 190a, 190b, 190c, 190d, and 190e are disposed with a first height difference of 10 cm. The first water level electrode 190a at the lowest base is disposed along the outermost line among the effective electrode placement areas of one line (the right line in FIG. 3 ) of the first sensing substrate 160 , and has a next height (90 cm height). The first water level electrode 190b is disposed along the outermost line of the effective electrode arrangement area of the other line (the left line in FIG. 3 ) of the first sensing substrate 160 . And the third lowest first water level electrode 190c is disposed along the right line of the first sensing substrate 160 again, and is disposed along the outermost line inside the line where the first water level electrode 190a of the base is formed. do. As described above, by disposing the water level electrodes in an odd-even manner using both lines of the first sensing substrate 160 from the base to the upper portion, insulation breakdown between the water level electrodes of adjacent heights can be prevented. It is possible to efficiently arrange the water level electrodes within the limited width of the substrate.

Meanwhile, as in FIG. 2 , when the sewage water 620 is at a lower water level than the sewage conduit 610 , it is not necessary to measure the level of the sewage water at close intervals, so the first water level electrodes 190a, 190b, 190c, 190d, 190e ) are arranged with a height difference of 10 cm. However, since it is necessary to detect the water level more precisely by narrowing the water level measurement interval from the point passing through the sewage conduit 610, the second water level electrodes 196a, 196b, 196c, 196d, and 196e are second smaller than the first height difference. They are arranged with a height difference of 5 cm, which is a height difference. Referring to FIG. 3 , the second water level electrode 196a disposed on the top of the first sensing substrate 160 is disposed with a height difference of 5 cm from the previous first water level electrode 190e, and the corresponding second water level electrode 196a ) is an electrode for detecting a water level of 55 cm. The remaining second water level electrodes 196b, 196c, 196d, and 196e are disposed on the second sensing substrate 180 as shown in FIG. 5 .

4 depicts the rear surface of the second sensing substrate 180 . Referring to FIG. 4 , the second electrode connection part 182 is formed on the bottom of the rear surface of the second sensing substrate 180 , and the third electrode connection part 184 is formed on the upper surface of the second sensing substrate 180 . The second electrode connection part 182 and the third electrode connection part are each composed of electrode pads having the same number and shape as the first electrode connection part 162 . As the front upper end of the first sensing substrate 160 and the rear lower end of the second sensing substrate 180 overlap and assemble, the first electrode connecting unit 162 and the second electrode connecting unit 182 are connected. In addition, each electrode pad of the second electrode connection part 182 and each electrode pad of the third electrode connection part 184 are connected by patterned electrode lines to be isolated from each other. Accordingly, the ground electrode 170, the first water level electrodes 190a, 190b, 190c, 190d, and 190e, and the second water level electrode 196a from the signal lines connected to the respective electrode pads of the third electrode connection unit 184 signals can be recognized.

5 depicts the front surface of the second sensing substrate 180 . A mark indicating a depth of 50 cm is printed on the lower front of the second sensing substrate 180 . In addition, installation holes 192 are formed at predetermined intervals along the longitudinal direction of the second sensing substrate 180 . Since the electrodes are concentrated in the center of the upper portion of the second sensing substrate 180 , the installation hole 192 may not be formed.

The second water level electrodes 196b , 196c , 196d , and 196e and the third water level electrodes 198 are disposed from the bottom of the second sensing substrate 180 to the upper portion. Similar to the installation rule of the first sensing substrate 160 , the second water level electrode 196b at the lowest base is the outermost of the effective electrode arrangement area of one line (the right line in FIG. 5 ) of the second sensing substrate 180 . The second water level electrode 196c of the next height (45 cm height) is disposed along the line, and the second water level electrode 196c is disposed along the outermost line of the effective electrode arrangement area of the other side line (the left line in FIG. 5 ) of the second sensing substrate 180 . do. As described above, the water level electrodes of each height are disposed along the outermost line of the effective electrode arrangement area toward the upper side, and are disposed in an odd-even manner using both sides of the second sensing substrate 180 . , it is possible to efficiently arrange the electrodes while maintaining the insulation between the electrodes.

As shown, the third water level electrodes 198 are disposed with a height difference of 1 cm, which is a third height difference smaller than the second height difference. Referring to FIG. 5 , the third water level electrodes 198 are disposed with a height difference of 1 cm from 30 cm to 0 cm indicating the full water level. Therefore, it is possible to detect the level of sewage with higher precision from 30 cm to the full water level.

Referring to FIG. 5 , a fourth electrode connection part 186 is disposed on the uppermost front surface of the second sensing substrate 180 . The fourth electrode connection portion 186 is composed of a plurality of electrode pads that are insulated from each other, and each of the electrode pads includes the second water level electrodes 196b, 196c, 196d, and 196e and the third water level electrodes 198 and the electrode. They are connected through a line pattern.

Referring to FIG. 6 , the smart manhole cover 100 of the present invention includes a water level sensor 150 , a displacement sensor 130 , a vibration sensor 151 , a solar cell module 140 , and a power supply unit 153 . ), a control unit 155 , a short-range wireless communication module 157 , and a disaster prevention information transmission unit 159 .

The structure of the water level sensor 150 has been described with reference to FIGS. 3 to 5 . The water level sensor 150 has input terminals (two terminals connected to a ground electrode, 5 connected to the first water level electrode) connected to respective electrode pads constituting the third electrode connection part 184 and the fourth electrode connection part 186 . terminal, 5 terminals connected to the second water level electrode, and 30 terminals connected to the third water level electrode) may be configured as a module including a microprocessor. The microprocessor may recognize a water level electrode of the lowest level energized with the ground electrode and output a corresponding level detection signal to the controller 155 . As another example, the water level sensor 150 has an output pin of 42 terminals, and the microprocessor built in the control unit 155 detects whether each terminal is energized to recognize the water level of the sewage 620 and generate manhole level information. You may.

In addition, the control unit 155 generates the manhole index displacement information indicating the amount of change in the position of the smart manhole cover 100 from the detection value of the displacement sensor 130 . The process of detecting the displacement of the ground surface on which the smart manhole cover 100 is installed in the displacement sensor 130 is the same as described above.

The vibration sensor 151 is a sensor for detecting vibration applied to the smart manhole cover 100, and the control unit 155 generates information on the amount of manhole vibration indicating the amount of vibration from the detection value of the vibration sensor.

The power supply unit 153 controls the charging and discharging of the solar cell module 140 , and supplies the power stored in the solar cell module 140 to each component of the smart manhole cover 100 .

The short-range wireless communication module 157 is preferably a Bluetooth Low Energy (BLE) module or a Long Range (LoRa) communication module having a larger communication radius.

Disaster prevention information transmission unit 159 means for transmitting the disaster prevention information including the manhole surface displacement information, the manhole level information, and the manhole vibration amount information generated by the control unit 155 to the disaster prevention information collection pole 200 in a short-range wireless communication method am.

The disaster prevention information transmitter 159 may transmit a data packet including a unique ID or physical address assigned to each smart manhole cover 100 when transmitting the disaster prevention information. As another example, although not shown, the smart manhole cover 100 further includes a GPS module, and location information measured by the GPS module may be included in the disaster prevention information and transmitted to the disaster prevention information collection pole 200 .

7 is a diagram conceptually depicting an example of measuring an inclined surface fine displacement of a disaster prevention information collection pole in the present invention, FIG. 8 is a block diagram showing an example of the configuration of a disaster prevention information collection pole in the present invention, and FIG. 9 is a disaster prevention in the present invention It is a flowchart illustrating the process of measuring the fine displacement of the information collection pole.

In the present invention, the disaster prevention information collection pole 200 may not only be responsible for relaying disaster prevention information, but may generate and transmit a micro-variation signal of the surface of the slope by itself to the disaster prevention server 400 . 7 shows an example of measuring the micro-displacement of the slope surface in the disaster prevention information collection pole 200 .

Referring to FIG. 7 , at least one of the disaster prevention information collection poles 200 may be installed in a mountainous area or on a slope of a road. In addition, a reference pole 250 having a spherical reflector 252 at a predetermined height may be further installed at a location spaced apart from the disaster prevention information collection pole 200 by a predetermined distance.

A laser range finder 210 is installed at a predetermined height of the disaster prevention information collection pole 200 . The laser light transmitter 212 of the laser range finder 210 is directed to the spherical reflector 252 and emits laser light, and the laser light receiver 214 is the light reflected from the light reflecting contact of the spherical reflector 252 and returned. receive In the illustrated example, the light transmission line and the reception line are exemplified as being spaced apart from each other on the representation of the drawing, but in reality, light reflection will be made at one contact point of the spherical reflector 252 .

Referring to FIG. 7 , a remote data collection unit (RTU), a solar panel 230 , and an antenna 240 are installed in the disaster prevention information collection pole 200 .

The remote data collection unit 220 collects disaster prevention information from the smart manhole cover 100 and transmits it to the disaster prevention server 400 . In addition, from the value detected by the laser range finder 210 , the inclined surface surface displacement micro-variation data is generated, and the generated data is transmitted to the disaster prevention server 400 .

The antenna 240 is a means for transmitting the surface displacement micro-variation signal as a radio signal from the remote data collection unit 220 . For example, the surface displacement fine fluctuation signal may be remotely transmitted in the form of Code Division Multiple Access (CDMA), Long Term Evolution (LTE), 5G, or the like through the antenna 240 .

Referring to FIG. 8 , the disaster prevention information collection pole 200 further includes a rainfall meter 272 , and the remote data collection unit 220 includes a laser light transmitter 274 , a laser light receiver 276 , and a timing It may include a controller 278 , a controller 260 , a broadband mobile communication module 280 , and a memory unit 282 . The photovoltaic cell module 284 converts and stores the light energy received from the photovoltaic panel 230 into electrical energy, and supplies operating power to each component constituting the disaster prevention information collection pole 200 .

The controller 260 may include a rainfall information generating unit 262 , a laser driver 264 , a signal detecting unit 266 , a comparing unit 268 , and a displacement micro-variation recognizing unit 270 .

The rainfall information generating unit 262 generates rainfall information from the measurement data of the rainfall meter 272 and transmits the generated rainfall information to the disaster prevention server 400 .

The laser driver 264 is a means for operating the laser light transmitting unit 274 and the laser light receiving unit 276 . For example, the laser driver 264 switches the operating power at intervals set by the timing controller 278 to operate the laser light transmitter 274 and the laser light receiver 276 .

The signal detector 266 detects the optical signal received from the laser light receiver 276 and digitally samples it. For example, a signal output from the laser light receiver 276 is converted into a digital signal and sampled to generate a distance measurement value.

The comparison unit 268 is a means for comparing a predetermined preset value and a currently measured distance measurement value. The displacement micro-variation recognizing unit 270 generates an inclined surface surface displacement micro-variation signal from the output signal of the comparator 268 , and the inclined surface surface displacement micro-variation signal is transmitted to the disaster prevention server 400 through the broadband mobile communication module 280 . is sent

The memory unit 282 is a unit for storing the preset value set by the control unit 260 and the distance measurement value detected by the signal detection unit 266 together with the measurement time.

9 is a flowchart illustrating a process of generating a micro-variation signal of the slope surface surface displacement in the disaster prevention information collection pole 200 . A process of generating the slope surface displacement micro-variation signal in the present invention will be described with reference to FIG. 9 .

First, power is supplied to the laser distance measuring device 210 to start measuring the laser distance (ST910). Then, it is determined whether the number of measurements has reached a predetermined number of times (N) (ST920).

When the plurality of measurements are completed, an average value of the distance measurement values is calculated to set a preset value (ST930).

Then, the laser distance measurer 210 is operated to obtain a current distance measurement value (ST940). Next, it is determined whether the current distance measurement value deviates from the allowable error range of the preset value (ST950).

If the current distance measurement value deviates from the allowable error of the preset value, a fine variation signal of the slope surface displacement is generated and transmitted to the disaster prevention server 400 (ST960).

Referring back to FIG. 1 now, the manhole damage determination unit 410 of the disaster prevention server 400 may determine whether the smart manhole cover 100 is damaged by using the manhole surface displacement information received from the smart manhole cover 100 . have. For example, the average value of the manhole surface displacement of a plurality of smart manhole covers 100 located within a predetermined radius is calculated, and the deviation of the average value and each manhole surface displacement is calculated. And when the deviation exceeds a predetermined reference value, it is determined that the corresponding smart manhole cover 100 corresponds to a symptom of damage.

As another example, the manhole damage determination unit 410 may determine whether the smart manhole cover 100 is damaged by combining the manhole index displacement information and the manhole vibration amount information. For example, when both the manhole vibration amount and the manhole surface displacement exceed the respective reference values, it may be determined that the smart manhole cover 100 that has transmitted the corresponding disaster prevention information corresponds to a symptom of damage.

The submerged area diagnosis unit 420 may diagnose the area in which the smart manhole cover 100 is located as the flooded area when the manhole water level information received from the smart manhole cover 100 exceeds a predetermined reference value. For example, when the water level sensor 150 of the smart manhole cover 100 detects the level of sewage (eg, water level of 30 cm) at the third water level electrode 198, it can be diagnosed as a submerged area for the corresponding manhole. have. As another example, when the rainfall information received from the disaster prevention information collection pole 200 indicates a high amount of rainfall, the water level reference value for diagnosing the flooded area is 55 cm corresponding to the bottom height of the second water level electrode 196a - the sewage pipe 610. Water level - can be adjusted to the corresponding numerical value.

Meanwhile, FIG. 10 is a diagram illustrating a process in which the disaster prevention server predicts a sinkhole area in the present invention. As in FIG. 10, the first smart manhole cover 100a, the second smart manhole cover 100b, and the third smart manhole cover 100c within a predetermined radius in three places of the manhole surface displacement information is predetermined sinkhole If it exceeds the prediction reference value (here, the sinkhole prediction reference value is lower than the reference value for determining the manhole breakage), the sinkhole prediction unit 430 sinks the area surrounded by the three smart manhole covers 100a, 100b, 100c. It is judged as a risk zone (SH-Zone). And, by generating a traffic control command for the sinkhole risk zone (SH-Zone) and transmitting it to the traffic control server, it is possible to prevent fall accidents and traffic safety accidents in the sinkhole risk zone in advance.

Various modifications are possible within the scope of the invention disclosed above without detracting from the basic idea. That is, all of the above embodiments should be interpreted as illustrative and not restrictive. Therefore, the protection scope of the present invention should be determined according to the appended claims, not the above-described embodiments, and if the components defined in the appended claims are substituted with equivalents, it should be considered as belonging to the protection scope of the present invention.

100: smart manhole cover 110: cover
120: solar panel 130: displacement sensor
140: solar cell module 150: water level sensor
151: vibration sensor 153: power supply
155: control unit 157: short-distance communication module
159: disaster prevention information transmitter 160: first sensing board
162: first electrode connection 170: ground electrode
172: installer 180: second sensing board
182: second electrode connection portion 184: third electrode connection portion
186: fourth electrode connection part 190: signal line
192: installer 190a ~ 190e: first water level electrode
196a to 196e: second water level electrode 198: third water level electrode
200: disaster prevention information collection pole 210: laser distance meter
212: laser light transmitter 214: laser light receiver
220: remote data collection unit 230: solar panel
240: antenna 250: reference pole
252: spherical reflector 260: control unit
262: rainfall information generation unit 264: laser driver
266: signal detection unit 268: comparison unit
270: displacement micro-variation recognition unit 272: rainfall meter
274: laser light transmitter 276: laser light receiver
278: timing controller 280: broadband mobile communication module
282: memory means 284: solar cell module
300: broadband mobile communication network 400: disaster prevention server
410: manhole damage determination unit 420: flooded area diagnosis unit
430: sinkhole prediction unit 500: disaster prevention information database server
600: manhole 610: sewage pipe
620: sewage

Claims (15)

A smart manhole cover that covers the manhole formed on the road and transmits the disaster prevention information of the location where the manhole is installed in a short-distance wireless communication method;
a disaster prevention information collection pole that collects disaster prevention information from the smart manhole cover and remotely transmits the collected disaster prevention information using a broadband mobile communication method;
a disaster prevention server that receives the disaster prevention information from the disaster prevention information collection poll and performs disaster prevention management in a downtown area; and
Disaster prevention information database server that stores and manages the disaster prevention information
Disaster prevention management system using a smart manhole cover comprising a.
According to claim 1,
The smart manhole cover,
a displacement sensor for detecting the displacement of the ground surface on which the smart manhole cover is installed;
a control unit for generating manhole index displacement information indicating the amount of change in the position of the smart manhole cover from the detection value of the displacement sensor; and
Disaster prevention information transmission unit for transmitting disaster prevention information including the manhole surface displacement information to the disaster prevention information collection
Disaster prevention management system using a smart manhole cover comprising a.
3. The method of claim 2,
The displacement sensor includes a first gyro sensor including a three-axis angular velocity sensor in which X and Y axes are parallel to the ground surface and the Z axis is installed at right angles to the ground surface, and a triaxial angular velocity sensor in which the Z axis is installed parallel to the ground surface. It includes a second gyro sensor consisting of a sensor,
The control unit is a disaster prevention management system using a smart manhole cover to generate the manhole surface displacement information using the X-axis rotation angle and the Y-axis rotation angle of the first gyro sensor and the Z-axis rotation angle of the second gyro sensor.
4. The method of claim 3,
The smart manhole cover further comprises a vibration sensor for detecting the vibration of the smart manhole cover,
The control unit generates manhole vibration amount information indicating the amount of vibration applied to the smart manhole cover from the detection value of the vibration sensor,
The disaster prevention information transmission unit is a disaster prevention management system using a smart manhole cover for transmitting the disaster prevention information further including the manhole vibration amount information to the disaster prevention information collection pole.
5. The method of claim 4,
The disaster prevention server determines whether the smart manhole cover is damaged by combining the manhole indicator displacement information and the manhole vibration amount information, and generates a traffic control command to control traffic around the smart manhole cover determined to be damaged. Disaster prevention management system using a smart manhole cover including a manhole damage determination unit.
4. The method of claim 2 or 3,
When the manhole index displacement information received from three or more smart manhole covers located within a predetermined radius exceeds a predetermined sinkhole prediction reference value, the disaster prevention server determines that the manhole index displacement information exceeds the sinkhole prediction reference value Disaster prevention management system using a smart manhole cover including a sinkhole prediction unit that determines the area surrounded by the appeared smart manhole cover as a sinkhole occurrence risk area.
3. The method of claim 2,
The smart manhole cover further comprises a water level sensor for detecting the level of sewage in the manhole,
The control unit generates manhole water level information indicating the level of the sewage from the detection value of the water level sensor,
The disaster prevention information transmission unit is a disaster prevention management system using a smart manhole cover for transmitting the disaster prevention information further including the manhole water level information to the disaster prevention information collection pole.
8. The method of claim 7,
The water level sensor is
a first sensing substrate installed in the lower part of the manhole, printed to expose the ground electrode, and printed to expose a plurality of water level electrodes at different heights from the base to the top; and
It is installed on the upper part of the manhole, and on the uppermost part of the rear surface, the electrode pads connected to the ground electrode and the water level electrode of the first sensing substrate are patterned to be insulated from each other, and on the front surface, a plurality of the plurality of electrodes at different heights from the base to the upper part are formed. The second sensing substrate is printed so that the water level electrode is exposed, and the electrode pads connected to the water level electrodes on the front surface are patterned to be insulated from each other.
Disaster prevention management system using a smart manhole cover comprising a.
9. The method of claim 8,
The water level electrode and the electrode line connected to the water level electrode are alternately arranged along the outermost line on one side and the outermost line on the other side as going up from the bottom to the top on the first sensing substrate and the second sensing substrate, respectively. Disaster prevention management system using
10. The method of claim 9,
The water level electrode includes a plurality of first water level electrodes disposed on the first sensing substrate with a first height difference from the base, and a second height difference smaller than the first height difference across the first sensing substrate and the second sensing substrate. A disaster prevention management system using a smart manhole cover comprising a plurality of second water level electrodes disposed on the second sensing substrate and a plurality of third water level electrodes disposed with a third height difference smaller than the second height difference on the second sensing substrate.
11. The method according to any one of claims 7 to 10,
The disaster prevention server is a disaster prevention management system using a smart manhole cover including a flooded area diagnosis unit that determines the area where the smart manhole cover is located as a flooded area when the manhole water level information received from the smart manhole cover exceeds a predetermined reference value .
12. The method of claim 11,
The disaster prevention information collection pole includes a rainfall meter that measures the amount of rainfall, and a rainfall information generator that generates rainfall information from the measurement data of the rainfall meter and transmits it to the disaster prevention server,
A disaster prevention management system using a smart manhole cover that adjusts the flooded area diagnosis unit by increasing or decreasing a reference value for determining a flooded area according to the rainfall information.
4. The method of claim 2 or 3,
It is installed at a predetermined distance from the disaster prevention information collection pole and further includes a reference pole having a spherical reflector at a predetermined height,
The disaster prevention information collection pole,
a laser distance meter for emitting laser light directed at the spherical reflector and measuring a distance of the spherical reflector to a light reflective contact point by recognizing the light reflected from the spherical reflector;
a laser driver for operating a laser beam transmitter and a laser beam receiver of the laser distance meter;
a signal detecting unit for digitally sampling the optical signal received from the laser light receiving unit;
a comparison unit that compares the signal detected by the signal detection unit with a predetermined preset value; and
Displacement fine fluctuation recognition unit for generating the ground surface displacement fine fluctuation signal from the output signal of the comparator and transmitting it to the disaster prevention server
Disaster prevention management system using a smart manhole cover comprising a.
14. The method of claim 13,
The disaster prevention information collection pole is a disaster prevention management system using a smart manhole cover further comprising a timing controller for controlling the operation period of the laser driver.
15. The method of claim 14,
The displacement micro-variation recognizing unit sets the preset value by calculating an average value from a plurality of distance measurements during the initial operation of the laser range finder, and the current distance measurement value measured by the laser distance finder is a tolerance of the preset value Disaster prevention management system using a smart manhole cover that generates the surface displacement micro-variation signal when out of range.

Images