KR102041232B1 - Apparatus for monitoring underwater quality and predicting earthquake capable of detecting vibration of small surface wave and detecting water temperature, electrical conductivity, and Radon - Google Patents

Abstract

The present invention relates to an apparatus for measuring a underwater quality and predicting an earthquake, and comprises: a first sensor module (10) disposed in a well and having a water level sensor and a water temperature sensor; a second sensor module (20) which is spaced downward by a predetermined distance from the first sensor module (10) by a wire (25) and has a radon sensor and a conductivity sensor; and a server (40) for receiving and processing measurement data from the sensors of the first sensor module and the second sensor module. The server (40) detects a surface wave based on measurement data measured by the water level sensor (11), and predicts the earthquake based on the detected surface wave and the measurement data measured by the radon sensor.

Description

Apparatus for monitoring underwater quality and predicting earthquake capable of detecting vibration of small surface wave and detecting water temperature, electrical conductivity, and Radon}

The present invention relates to groundwater water quality measurement and earthquake prediction device, and more specifically, microscopic surface wave vibration detection and water temperature, conductivity, and which can predict the earthquake by detecting the precursor of earthquake using measurement data obtained by measuring groundwater quality. The present invention relates to a groundwater quality measurement and seismic prediction device capable of radon measurement.

In September 2016, the largest earthquake of the Korean Peninsula, with a magnitude of 5.8, occurred, and a 5.4 magnitude earthquake occurred in Pohang on November 15, 2017, resulting in a 4.6 magnitude earthquake on February 11, 2018. Recently, due to the frequent earthquakes, Korea is not safe from earthquakes.

In the meantime, various studies for earthquake forecasting and forecasting have been attempted worldwide to prevent earthquake damage and reduce human damage. According to this, abnormal variations in long-term groundwater observation data are applied to geological pressure and geological cracking. It is known that this long-term progression affects groundwater level and water quality changes. In other words, changes in groundwater level and water quality can be predictive indicators to estimate the timing and magnitude of earthquakes.

However, the conventional water quality measuring instrument used for groundwater quality measurement can measure from 1 second interval to 10 minutes in case of water level change, but there is a limitation in that it cannot measure the water level vibration generated when the storage period is short and the water level is suddenly changed. In other words, the microsurface wave generated during the earthquake changes in the mm range, whereas the conventional water quality measuring instrument can detect only surface waves in the range of 2 cm to 5 cm, thereby deteriorating reliability of earthquake prediction.

Patent Document 1: Korean Patent Registration No. 10-1542546 (August 6, 2015 notification)

It is an object of the present invention to provide a groundwater quality measurement and seismic prediction device that has a measurement accuracy that can be measured up to a change in mm and enables deep groundwater quality observation.

It is another object of the present invention to provide a groundwater quality measurement and seismic prediction device capable of measuring water quality factors, in particular groundwater radon and electrical conductivity, which are changed by cracks in rock formations.

Another object of the present invention is to separate the water level sensor for measuring the water level and the radon sensor for measuring radon from each other to provide a groundwater quality measurement and seismic prediction device that can improve the measurement accuracy by measuring the water level and radon at different positions, respectively. To do

Still another object of the present invention is to provide a groundwater quality measurement and earthquake prediction device capable of predicting an earthquake by detecting the precursor of an earthquake using the measured measurement data.

The object of the present invention can be achieved by groundwater quality measurement and seismic prediction apparatus. Groundwater quality measurement and earthquake prediction device of the present invention, the first sensor module 10 disposed in the well and having a water level sensor and a water temperature sensor; A second sensor module 20 which is spaced downward by a predetermined distance from the first sensor module 10 by the wire 25 and has a radon sensor and an electric conductivity sensor; And a server 40 for receiving and processing measurement data from sensors of the first sensor module and the second sensor module, wherein the server 40 includes the measurement data measured by the water level sensor 11. It is characterized by detecting the surface wave based on the detected surface wave and predicting the earthquake based on the detected surface wave and the measured data measured by the radon sensor.

According to an embodiment, the water level sensor is a pressure sensor, and the server calculates a distance from the groundwater level to the pressure sensor based on the water pressure from the groundwater level measured by the pressure sensor to the first sensor module. The surface wave can be detected based on the calculated change amount of the distance.

According to one embodiment, the water level sensor may be installed on the top surface of the first sensor module.

According to one embodiment, the first sensor module is located at a height within 5 meters from the groundwater surface, the second sensor module may be located adjacent to the rock layer of the surface.

According to an embodiment, the server may predict an earthquake based on the detected surface wave and measured data of the radon sensor and the conductivity sensor.

 According to an embodiment of the present disclosure, the server may detect a change in water level and surface wave calculated from the measurement data of the water level sensor, a change in radon concentration measured by the radon sensor, and a change in electrical conductivity measured by the electric conductivity sensor. Earthquakes can be predicted based on

Groundwater quality measurement and seismic prediction device according to the present invention is a water temperature sensor, water level sensor, electrical conductivity sensor and radon sensor groundwater quality factors that are changed by the crack of the rock band, that is, water temperature, water level, electrical conductivity and radon concentration I can figure it out correctly. In addition, it is possible to predict the occurrence of an earthquake through the change of the surface wave, the change of electric conductivity and the radon concentration according to the water level.

In addition, the groundwater quality measurement and earthquake prediction device according to the present invention, the water level sensor can measure the water level in mm unit, and has a measurement precision that can be measured several dozen times in one second to ensure the reliability of the measurement data for earthquake prediction Can be.

In addition, by positioning the first sensor module for measuring the water level and the second sensor module for measuring the radon concentration at different depths of the groundwater to enable faster earthquake prediction.

1 is a view for explaining a groundwater quality measurement and earthquake prediction device according to an embodiment of the present invention,
2 is a diagram for describing a first and a second sensor module according to an exemplary embodiment.

Objects, other objects, features and advantages of the present invention will be readily understood through the following preferred embodiments associated with the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. Rather, the embodiments introduced herein are provided so that the disclosure may be made thorough and complete, and to fully convey the spirit of the present invention to those skilled in the art.

In the drawings of the present specification, the length, thickness, width, etc. of the components may be exaggerated for the effective description of the technical content.

In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, the words 'comprise' and / or 'comprising' do not exclude the presence or addition of one or more other components.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In describing the specific embodiments below, various specific details are set forth in order to explain and understand the invention more specifically. However, those skilled in the art can understand that the present invention can be used without these various specific details. In some cases, it is mentioned in advance that parts of the invention which are commonly known in the present invention and which are not related to the invention are not described in order to avoid confusion in describing the present invention.

Figure 1 is a schematic diagram showing the groundwater quality measurement and earthquake prediction device according to an embodiment of the present invention, Figure 2 is a schematic diagram showing the configuration of each sensor module (10, 20).

As shown, the groundwater quality measurement and earthquake prediction device according to an embodiment of the present invention is disposed in the well (W) to measure the water quality of the groundwater, and predicts the earthquake based on the change of the measured groundwater quality data

Groundwater quality measurement and seismic forecasting devices measure water quality factors, especially radon and electrical conductivity of groundwater, and detect rapid changes in groundwater levels and changes in water temperature. As a result, it acts as a precision measuring instrument used in the groundwater groundwater network and the national groundwater network, and at the same time performs the earthquake prediction function.

To this end, the groundwater quality measurement and earthquake prediction device of the present invention is disposed in the well (W) and provided with a first sensor module 10 and a second wire 25 having a water level sensor 11 and a water temperature sensor 12. The second sensor module 20 and the first sensor module 10, which is positioned by being spaced downwards by a predetermined distance from the first sensor module 10 and provided with a radon sensor 22 and an electrical conductivity sensor 21, and the first sensor module 10 and It includes a server 40 for receiving and processing the measurement data from the second sensor module 20.

The first sensor module 10 is disposed in the alluvial layer below the groundwater surface as shown in the figure. The first sensor module 10 is connected to the server 40 by the first wire 15. The gateway 30 is provided between the server 40 and the first sensor module 10 to transmit the measurement data transmitted from the first sensor module 10 to the server 40.

The first sensor module 10 is formed in an airtight enclosure shape, the water level sensor 11 is provided on the upper surface of the first sensor module 10 and the water temperature sensor 12 is accommodated inside or partly outside. May be exposed. Here, the water level sensor 11 may be implemented as a pressure sensor. The pressure sensor calculates a distance d from the ground water surface to the pressure sensor based on the water pressure from the ground water surface to the first sensor module 10, and detects the surface wave based on the change amount of the calculated distance d. do.

Looking at the process of calculating the distance (d) of the water level sensor 11 in detail, as shown in FIG. 2, the first distance D1 from the ground surface to the first sensor module 10 indicates the length of the first wire 15. It can be calculated through. Since the water level sensor 11 is implemented as a pressure sensor, the pressure sensor can measure the water pressure, and calculate the height d from the ground level to the water level sensor 11 by the water pressure.

Subtracting the height d from the groundwater surface to the first sensor module 10 from the first distance D1 from the ground surface to the first sensor module 10, the distance L from the ground surface to the groundwater surface can be known. Will be.

The server 40 detects the surface wave through the change of the distance L from the ground surface to the ground water surface according to the time transmitted from the water level sensor 11.

In the water level sensor 11 according to the present invention, the measurement period is set in minutes or hours. However, from the moment when the fluidity of the groundwater level is measured, the measurement period is set to be changed several tens of times per second by the control of the server 40 to improve the measurement accuracy.

For example, when the flow range of the surface wave is set to 4 cm, when the change of the distance (L) from the ground surface to the ground water level calculated by the measurement of the water level sensor 11 is less than 4 cm, the water level sensor 11 is set to the set measurement period. The water level is measured and transmitted to the server 40, and if the change in the distance (L) exceeds 4cm, the water level sensor 11 measures the water level in a period of 0.01 ~ 0.5 seconds and transmits to the server 40.

In addition, the water level sensor 11 according to the present invention is precisely provided to measure the amount of water level change in mm units. As a result, it is possible to improve the earthquake detection reliability by detecting the wave height of the micro surface wave.

At this time, in order to improve the measurement accuracy of the water level sensor 11, the first sensor module 10 is preferably located within a predetermined distance from the ground water surface. This is because it may be difficult to measure the water level in mm when installed over a predetermined distance. For example, in one embodiment, the first sensor module 10 is located within 5 meters below the groundwater surface.

On the other hand, the water temperature sensor 12 is coupled to the first sensor module 10 to measure the water temperature of the groundwater. The water temperature measured by the water temperature sensor 12 is transmitted to the server 40. The server 40 may analyze the water quality of the groundwater based on the water level measured by the water level sensor 11 and the water temperature measured by the water temperature sensor 12. The groundwater quality analyzed in this way can be used for various purposes as well as seismic measurement.

The second sensor module 20 is positioned to be spaced downward by hanging from the first sensor module 10 by the second wire 25. The second sensor module 20 includes a radon sensor 22 and an electrical conductivity sensor 21.

In the present invention, the second sensor module 20 is independently provided to be spaced apart from the first sensor module 10. This is because the second sensor module 20 is provided in the deep groundwater layer close to the rock layer to detect the change in radon more quickly. Rock layers are formed to a depth of 30m to 150m. Changes in radon caused by earthquakes can be detected quickly the deeper they are. Therefore, the second sensor module 20 is located in the deep groundwater layer spaced apart from the first sensor module 10 located near the surface of the water to detect the groundwater level and radon concentration at different positions, thereby improving the precision of seismic measurement. You can.

The radon sensor 22 is a sensor for measuring radon concentration, and may be provided to detect beta particles that are emitted when radon is radioactive decay. For example, the radon sensor 22 may be implemented as a pin photo-diode.

Suddenly high radon concentrations can be predicted as a precursor to earthquakes. Earthquakes are caused by faults or volcanic activity, and the moments of earthquakes are affected by deeper uranium-rich materials, such as magma and hydrothermal water. Radon is the daughter of radium, an element formed during radioactive decay of uranium and ultimately lead to lead. This high radon means a lot of uranium and a high probability of earthquakes such as earthquakes.

The conductivity sensor 21 detects the conductivity included in the groundwater. Pure water (H ₂ O) has a low electrical conductivity. The sudden rise in the electrical conductivity of groundwater means that the groundwater has a lot of contaminants. When the ground shakes, such as an earthquake, it can be inferred that the earth's components around groundwater can be dissolved in water, and salts in seawater are dissolved in the groundwater to increase electrical conductivity.

The server 40 receives and processes measurement data from the sensors 11, 12, 21, and 22 of the first sensor module 10 and the second sensor module 20. The server 40 may include the water level data transmitted from the water level sensor 11, the water temperature data transmitted from the water temperature sensor 12, the radon concentration data received from the radon sensor 22, and the electricity measured by the electric conductivity sensor 21. Collect conductivity values and predict earthquakes based on these measurement data.

At this time, the server 40 detects the surface wave based on the change of the water level data measured by the water level sensor 11. When the change in the surface wave is out of the reference range, the server 40 may predict the earthquake by comprehensively determining the case where the radon concentration becomes higher than the reference concentration and the electrical conductivity becomes higher than the reference value. When the server 40 predicts an earthquake, the manager takes follow-up actions such as generating an earthquake alarm.

The process of using the groundwater quality measurement and seismic prediction apparatus according to the present invention having such a configuration will be described with reference to FIGS. 1 and 2.

To collect groundwater, excavation is carried out and wells are installed. As shown in FIG. 1, the server 40 and the gateway 30 are installed on the ground, and the first sensor module 10 and the second sensor module 20 are introduced into the groundwater. In this case, the first sensor module 10 is connected by the gateway 30 and the first wire 15, and the second sensor module 20 is connected by the second wire 25 to the first sensor module 10. Connected with A cable (not shown) for transmitting an electrical signal may be accommodated in the first wire 15 and the second wire 25.

The first wire 15 and the second wire 25 are electrically connected to the gateway 30 to transmit measurement data of the sensors 11, 12, 21, 22 to the gateway 30. The gateway 30 transmits the received measurement data to the server 40.

The first distance D1 spaced apart from the ground surface by the first sensor module 10 may be confirmed through the length of the first wire 15, and the second distance D2 spaced apart from the ground surface by the second sensor module 20. ) Can be confirmed through the length of the second wire 25.

The water temperature sensor 12 and the water level sensor 11 located in the first sensor module 10 measure and transmit the water temperature and the water level for each preset sensing period. The radon sensor 22 and the electric conductivity sensor 21 located in the second sensor module 20 also detect and transmit radon concentration and electric conductivity values at predetermined detection periods.

The server 40 analyzes the measurement data received from the sensors 11, 12, 21, and 22, and compares the measured data with a predetermined reference value to determine the amount of change. At this time, the server 40 is preferably provided to have a storage capacity for storing the measured data for 30 days or more.

The server 40 predicts an earthquake and generates an alarm for the administrator to recognize when the change in the surface wave, the radon concentration rapidly increases, or the electrical conductivity value increases, so that the follow-up action can proceed quickly. .

As described above, the groundwater quality measurement and seismic forecasting device according to the present invention is a water quality factor of the groundwater that is changed by the crack of the rock band through the water temperature sensor, the water level sensor, the electric conductivity sensor and the radon sensor, that is, the water temperature, the water level, the electricity. The conductivity and radon concentration can be determined. In addition, it is possible to predict the occurrence of earthquake through the surface wave, electrical conductivity and radon concentration according to the water level.

In addition, the groundwater quality measurement and seismic prediction device according to the present invention can be measured by the water level sensor can measure the water level in mm units, and can ensure the reliability in the measurement data having a measurement precision that can be measured several dozen times in one second.

In addition, the first sensor module for measuring the water level and the second sensor module for measuring the radon concentration are located at different depths to enable faster earthquake prediction.

As will be appreciated by those skilled in the art to which the present invention pertains, various modifications and variations are possible from the description of this specification. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims below and equivalents thereof.

10: first sensor module 11: water level sensor
12: water temperature sensor 5: the first wire
20: second sensor module 21: electrical conductivity sensor
22: radon sensor 25: the second wire
30: gateway 40: server
W: Well

Claims (6)

As groundwater quality measurement and earthquake prediction device,
A first sensor module 10 disposed below the groundwater level in the well and having a water level sensor and a water temperature sensor;
The second sensor is positioned in a deep groundwater layer having a depth of 30 m to 150 m from the ground and suspended downward by hanging the first sensor module 10 by the wire 25. Module 20; And
And a server 40 configured to receive and process measurement data from sensors of the first sensor module and the second sensor module.
The first sensor module is located at a height within 5 meters from the groundwater surface, the second sensor module is located adjacent to the rock layer of the surface,
The server detects the surface waves of the underground water surface in the well based on the measurement data measured by the water level sensor, and predicts the earthquake based on the detected surface waves and the measured data measured by the radon sensor. Groundwater quality measurement and seismic forecasting equipment. The method of claim 1,
The water level sensor is a pressure sensor,
The server calculates a distance from the ground level to the pressure sensor based on the water pressure from the ground level measured by the pressure sensor to the first sensor module, and detects the surface wave based on the calculated change in distance. Groundwater quality measurement and earthquake prediction device. The method of claim 2,
Groundwater quality measurement and earthquake prediction device, characterized in that the water level sensor is installed on the upper surface of the first sensor module. delete The method of claim 2,
And the server predicts an earthquake based on the detected surface wave and the measured data of the radon sensor and the conductivity sensor. The method of claim 5,
The server predicts an earthquake based on the water level change and the surface wave detection calculated from the measurement data of the water level sensor, the amount of change in radon concentration measured by the radon sensor, and the amount of change in electrical conductivity measured by the electric conductivity sensor. Groundwater quality measurement and earthquake prediction device, characterized in that.

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