KR101930912B1 - Water supply system and method including apparatus measuring Radon gas in fluid - Google Patents

Abstract

According to an embodiment of the present invention, there is provided a constant supply system comprising: a pumping pump for pumping groundwater of a well; A water tank for storing the pumped ground water as the supply water and including a water level sensor and an impeller therein; A radon measuring device installed in at least one of the well and the water tank; And a control unit configured to receive the measured values from the level measuring sensor and the radon measuring device, respectively, wherein the control unit controls the operation of the amphibious pump based on the water tank level measured by the level measuring sensor, And the operation of the amphibious pump and the impeller is controlled based on the radon concentration value of the ground water or the supply water measured by the radon measuring device.

Description

Technical Field [0001] The present invention relates to a water supply system including a radon measuring apparatus for measuring radon in a fluid,

The present invention relates to a constant supply system and method, and more particularly, to a constant supply system including a fluid radon measurement device capable of measuring a radon concentration in fluid in real time, and a method of supplying a constant using the system .

In Korea, about 95% of the total population is supplied with tap water. However, in rural areas such as rural villages and remote mountainous areas, large-area waterworks can not be supplied, and many depend on village constructions or small-scale water supply facilities.

"Village Constant" is a system that supplies its own constants to villages. In general, it uses groundwater around villages as a water source. Since groundwater may contaminate impurities such as iron and manganese, it is used as tap water after chlorine disinfection.

However, recently, the danger of radon gas is emerging. Especially, the concentration of radon gas contained in the village groundwater is high, which is a problem. Because the radon gas is generated endlessly in the natural state, it is more than 8 times as heavy as the air in the normal atmosphere. Therefore, even if the radon gas is deaerated by pumping groundwater, it is dissolved again in the groundwater.

Therefore, when using groundwater as a water source, it is necessary to measure the concentration of radon gas as well as usual chlorine disinfection and degassing below the reference value. However, there is no process for measuring and removing radon gas in groundwater.

In addition, the method or apparatus for measuring the concentration of radon contained in water, including groundwater, is to measure the alpha particles generated in the radial decay of radon in the container while shaking and deaeration in a sealed container To measure the radon concentration.

However, according to this method, it is not an actual measurement of radon concentration in water, but an indirect measurement method of measuring the degassed radon gas among radon dissolved in water. Also, when the degassed radon gas comes into contact with water again, Therefore, it can not be regarded as an accurate measurement value.

In particular, since the radon gas is 8 times heavier than the air in the normal atmosphere, it is concentrated on the surface of the water after degassing and the amount of redissolved in the water immediately after degassing is large. there is a problem.

Patent Document 1: Korean Published Patent Application No. 2011-0135842 (published on December 19, 2011)

According to an embodiment of the present invention, there is provided a constant supply system and method for measuring the radon concentration of ground water or feed water and supplying a constant to a village based on the measured value.

According to an embodiment of the present invention, there is provided a radon measuring device capable of measuring a radon concentration in a state in which a fluid exists without taking a part of the fluid into a sample (sample), and a constant supply system including the same and a constant supply method using the same to provide.

According to an embodiment of the present invention, there is provided a constant supply system comprising: a pumping pump for pumping groundwater of a well; A water tank for storing the pumped ground water as the supply water and including a water level sensor and an impeller therein; A radon measuring device installed in at least one of the well and the water tank; And a control unit configured to receive the measured values from the level measuring sensor and the radon measuring device, respectively, wherein the control unit controls the operation of the amphibious pump based on the water tank level measured by the level measuring sensor, And the operation of the amphibious pump and the impeller is controlled based on the radon concentration value of the ground water or the supply water measured by the radon measuring device.

Wherein the radon measuring device in the constant supply system includes a sensor capable of detecting beta particles, wherein the sensor is a virtual hemispherical space having a predetermined radius from the center of the sensor in the well or water tank, And a predetermined radius of the virtual chamber may be set to a maximum distance at which the sensor can detect beta particles in groundwater or feed water.

Further, in this case, in the constant supply system, the radon measuring device may include a measuring instrument body having a sensor capable of detecting the beta particles; And a fluid container coupled to the body of the meter and having at least one fluid inlet and a fluid outlet, wherein the sensing surface of the sensor is oriented toward the interior of the fluid container, May be located in the region of the virtual chamber defined by a virtual hemispherical space having a predetermined radius from the center.

According to an embodiment of the present invention, a pumping pump for pumping groundwater of a well; A water tank for storing groundwater pumped from the reservoir and equipped with an impeller; A supply pipe for supplying the supply water stored in the water tank to the outside; An on-off valve provided in the supply pipe; And a controller for controlling the pumping pump, the impeller, and the on-off valve, the method comprising the steps of: (a) controlling the supply of water in the water tank so that the supply water is maintained within a predetermined range; Controlling operation of the amphibious pump based on the measured water level of the water; (b) measuring the concentration of radon contained in the ground water or the supplied water and transmitting the measured radon concentration to the control unit; And (c) controlling the operation of the on-off valve installed in the supply pipe connected to the water pump, the impeller, and the water tank based on the measured radon concentration value of the ground water or the supply water; And supplying the constant water to the water tank.

The radon concentration of the groundwater or the feedwater can be measured by the constant supply system and method according to the embodiment of the present invention and the constant water can be supplied to the village based on the measured value, have.

According to the embodiment of the present invention, since the radon concentration can be measured in the state where the fluid exists without taking a part of the fluid into the sample (sample), the measurement is convenient and there is an advantage that the radon concentration can be measured in real time.

In addition, according to the embodiment of the present invention, there is no need to collect a part of the fluid as a sample, so that the structure of the apparatus is simple, and the time and cost required for installation and operation of the apparatus are saved.

1 is a view for explaining a constant supply system according to an embodiment of the present invention;
2 is a view for explaining an exemplary configuration of a water tank of a constant supply system according to an embodiment,
3 is a view for explaining a constant supply method according to an embodiment,
4 is a view for explaining a method of supplying a constant according to an alternative embodiment,
5 is a view for explaining a radon measuring apparatus according to an embodiment,
6 is a block diagram of a radon measuring apparatus according to an embodiment,
7 and 8 are views for explaining a virtual chamber according to an embodiment,
9 is a flow chart for explaining a radon measurement method using a virtual chamber according to an embodiment,
10 is a view for explaining an example of using a radon measuring apparatus including a driving fan according to an alternative embodiment,
11 is a view for explaining a virtual chamber according to yet another alternative embodiment;
12 and 13 are views for explaining a radon measuring apparatus having a fluid container according to an embodiment,
14 is a flow chart for explaining a radon measurement method using a fluid container according to an embodiment,
15 is a view for explaining a radon measuring apparatus having a fluid container according to an alternative embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features, and advantages of the present invention will become more readily apparent from the following description of preferred embodiments with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein but may be embodied in other forms. Rather, the embodiments disclosed herein are provided so that the disclosure can be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In this specification, when an element is referred to as being on another element, it may be directly formed on another element, or a third element may be interposed therebetween. Further, in the drawings, the thickness of the components is exaggerated for an effective description of the technical content.

Where the terms first, second, etc. are used herein to describe components, these components should not be limited by such terms. These terms have only been used to distinguish one component from another. The embodiments described and exemplified herein also include their complementary embodiments.

The terms 'upper', 'lower', 'left', 'right', etc. used to describe the positional relationship between components in the present specification do not mean directions as absolute references, Can be defined as the relative position of the object. It will therefore be appreciated that the expressions representing the positional relationships referred to below may represent relative positional relationships in the respective drawings when described with reference to the respective drawings.

In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms "comprise" and / or "comprising" used in the specification do not exclude the presence or addition of one or more other elements.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the drawings. Various specific details are set forth in the following description of specific embodiments in order to provide a more detailed description of the invention and to aid in understanding the invention. However, it will be appreciated by those skilled in the art that the present invention may be understood by those skilled in the art without departing from such specific details. In some cases, it should be mentioned in advance that it is common knowledge in describing an invention that parts not significantly related to the invention are not described in order to avoid confusion in explaining the present invention.

FIG. 1 is a view for explaining a constant supply system according to an embodiment of the present invention, in which a constant supply system is shown for supplying an underground water of a city to a village 50. FIG.

Referring to the drawings, a constant supply system according to one embodiment may include a pumping water pump 10, a water tank 20, at least one radon measuring device 40, and a control unit 30.

 The amphibious pump 10 is for pumping groundwater in a well, for example, connected to a water pipe 11 installed in the well and can pump groundwater. The groundwater pumped by the amphibious pump 10 is temporarily stored in the water tank 20 via the storage pipe 21. The water to be stored in the water tank 20 at this time is referred to as "supplied water" The feed water stored in the water tank 20 can be supplied as a constant to the village 50 via the feed pipe 22.

The radon measuring device 40 is a measuring device for measuring the radon concentration in the groundwater. The radon measuring device 40 has a sensor inside the measuring device that can detect the beta particles generated during radial decay of radon. The radon measuring device 40 can be suspended, for example, on the cable 41 and inserted into the canal to measure the radon concentration in the groundwater in the canal.

In FIG. 1, the radon measuring device 40 is inserted into the tank to measure the radon concentration of the groundwater. However, in an alternative embodiment, the radon measuring device is installed in the water tank 20, Can be configured to measure the radon concentration in the feed water.

The control unit 30 can receive the measured value of the radon measuring device 40 and can control the operation of the pump 10 based on the measured value. Also, although not shown in the drawings, a water level sensor for measuring the water level of the water to be supplied may be provided in the water tank 20, and the control unit 30 controls the opening and closing of the water supply pipe 22 according to the measured value of the water level sensor The valve can be controlled.

2 shows a specific configuration of the water tank 20 according to one embodiment.

2, the water tank 20 may include a water tank body 210 and a radon measuring device 220 installed in the body 210, a water level sensor 230, and an impeller 240. The storage pipe 21, the supply pipe 22 and the discharge port 23 are connected to the water tank 20. The groundwater of the well is supplied into the water tank 20 through the storage pipe 21. The supply water in the water tank 20 is supplied to the outside through the supply pipe 22. At this time, it is preferable that the storage pipe 21 is connected to the upper side of the water tank main body 210, for example, and the supply pipe 22 is connected to the lower side of the water tank main body 210. An open / close valve 221 may be provided on an arbitrary path of the supply pipe 22 and may be controlled by controlling the opening and closing amount of the open / close valve 221 under the control of the control unit 30, The amount can be adjusted.

For example, when the water tank 20 is cleaned, the discharge port 23 opens the on / off valve 231 provided in the discharge port 23 to discharge the supplied water to the outside You can clean the water tank after all of it has been drained.

In the illustrated embodiment, the radon measuring device 220 is a device for measuring the radon concentration in the feed water. In one embodiment, the radon measuring device 220 may have the same or similar configuration as the radon measuring device 40 installed in the vessel in FIG. Although the radon measuring device 220 is illustrated as being installed in the water tank 20 in the figure, in an alternative embodiment, the radon measuring device 40 may be installed only in the tank, and the radon measuring device 40, 220 ) May be respectively installed.

The water level measuring device 230 measures the water level of the water supplied into the water tank 20. It is preferable that the water level of the supply water be maintained between the connection portion of the storage pipe 21 and the connection portion of the supply pipe 22. Accordingly, in one embodiment, the measured value measured by the water level measuring apparatus 230 is transmitted to the control unit 30, and the controller 30 controls the connection level of the storage pipe 21 and the supply pipe Closing amount of the on-off valve 221 can be controlled so as to be maintained between the connecting portions of the on-off valves 221 and 22.

The impeller 240 is installed to stir the feed water stored in the water tank 20, and may have a propeller shape connected to the drive unit 245, for example. The driving unit 245 may be connected to the control unit 30 and controlled. The controller 30 drives the driving unit 245 to rotate the impeller 240 such that the supply water is stirred and dissolved in the supply water while the radon concentration in the supply water is high as a result of measurement by the radon- The radon gas that was present is deaerated. In one embodiment, a ventilation window 250 is provided at the top of the water tank 20 and by opening the ventilation window 250 when venting the radon gas by driving the impeller 240, The radon gas can be discharged to the outside of the water tank 20.

3 and 4, a method of supplying a constant according to an exemplary control operation of the control unit 30 will be described.

3 is an exemplary flowchart of a constant supply method assuming that the radon measuring device 40 is installed in the vessel. Referring to the drawing, in step S110, the controller 30 controls the operation of the amphibious pump 10 based on the measured water level of the feed water so that the feed water in the water tank is maintained at a water level within a predetermined range. That is, the amniotic fluid pump 10 can be controlled according to the level of the supplied water to adjust the amount of pumped water. In an alternative embodiment, the controller 30 may control the water pump 10 and the open / close valve 221 simultaneously to adjust the water level of the water to be supplied.

 Next, in step S120, the radon measuring device 40 installed in the wellhead measures the concentration of radon contained in the groundwater, and transmits the measured value to the controller 30. [ If the measured radon concentration value is less than the preset reference value, the open / close valve 221 may be at least partially opened to continuously supply the supply water to the village 50 (step S160). However, if the measured value of the radon concentration is greater than the preset reference value, the control unit 30 controls the amphibious pump 10 to stop the positive water or reduce the amount of water by proceeding to step S140.

Further, the control section 30 can control the opening / closing valve 221 to be at least partly closed. Even if the radon concentration value of the groundwater in the well is larger than the reference value, the radon concentration of the water supplied to the water tank 20 may be lower than the reference value, so that the open / close valve 221 is partially opened, It is possible to keep the supplying operation. At this time, for example, the control unit 30 can partially or completely close the on-off valve 221 according to the measured value of the radon concentration of the groundwater.

Simultaneously with this step S140, the controller 30 may drive the impeller 240 for a predetermined period of time to perform the operation of degassing the radon gas in the feed water (step S150). At this time, preferably, the ventilation window 250 is opened to discharge the degassed radon gas to the outside through the water tank 20. The 'predetermined time' at this time may be a predetermined value. For example, the impeller driving time can be set in advance in proportion to the radon concentration value, and the impeller can be driven according to the predetermined time according to the measured radon concentration value. When the impeller is driven for a predetermined time, the supply of the supply water can be restarted by opening the on-off valve 221 as in step S160.

4 is an exemplary flow chart of a constant supply method based on the assumption that a radon measurement device 220 is installed in a water tank 20, according to an alternative embodiment.

First, in step S210, the water tank 10 is controlled to adjust the water tank level. This step S210 is the same as or similar to the step S110 in Fig. 3, and thus the description thereof will be omitted.

Thereafter, in step S220, the radon measuring device 220 installed in the water tank 20 measures the radon concentration included in the supplied water and transmits the measured value to the controller 30. [ If the measured radon concentration value is less than the preset reference value, the on-off valve 221 is opened to continuously supply the supply water to the village 50 (step S260).

However, if the measured value of the radon concentration is greater than the predetermined reference value, the control unit 30 controls the amniotic pump 10 to stop the amniotic fluid or to reduce the amount of fluid and to close the supply valve 221 Thereby stopping the supply of the feed water.

At the same time as this step S240, the control unit 30 may drive the impeller 240 for a predetermined period of time to perform the operation of degassing the radon gas in the feed water (step S250). Preferably, the ventilation window 250 is opened, and the degassed radon gas is discharged to the outside through the water tank 20. After driving the impeller for a predetermined time, the flow advances to step S230 to measure the radon concentration of the water in the water tank. The controller 30 receives the measured value again from the measuring device 220 and updates the radon concentration value and controls the amphibious pump 10, the supply valve 221 and the impeller 240 in accordance with the updated measured value And the operation of degassing the radon gas is repeated (S240, S250).

The update of the radon concentration measurement value and the degassing operation of the radon gas can be continuously performed, for example, until the radon concentration falls below a predetermined reference value. If the measured concentration value is less than the reference value, the process proceeds to step S260 It is possible to open the on-off valve 221 and resume the supply of the supply water.

Now, an exemplary configuration of the radar measuring apparatuses 40 and 220 will be described in detail with reference to FIGS. 5 to 15. FIG. It will be understood by those skilled in the art that the radon measuring device 40 installed in the water tank 20 may be the same or similar in construction and function.

FIG. 5 schematically shows the internal structure of the radon measuring apparatus 40 according to one embodiment. Referring to the drawings, the measuring device 40 may be made of steel or any other metal or plastic material having rigidity, and may have a cylindrical shape or a tubular shape having a polygonal cross section.

In one embodiment, the measurement device may include a sensor 410 for radon measurement therein and a circuit board 420 in communication with the sensor. Although not shown in the drawings, in an alternative embodiment, the measurement device 40 may further include other sensors for measuring the characteristics of the groundwater, such as an electrical conductivity sensor, a temperature sensor, a pressure sensor, And may further include a power supply for supplying power to the board 420. [

In one embodiment, the radon measurement sensor 410 may be a sensor capable of detecting beta particles generated during radioactive decay of radon, and may be implemented, for example, as a pin photodiode.

The sensor 410 may be disposed on the lower surface of the measuring device 40. For example, the measuring device 40 may have a flat lower surface and the sensor 410 may be attached to this flat lower surface. At this time, the sensing surface 411 of the sensor 410 for detecting the beta particles is disposed so as to face outward, that is, to be exposed to the fluid (groundwater).

In an alternative embodiment, the sensor 10 may be disposed on the side of the measurement device. That is, the measuring device 40 may have a cylindrical shape whose cross section is circular or polygonal, and the sensing surface 411 of the sensor 410 may be arranged to be exposed to the fluid at the side of the measuring device.

In the illustrated embodiment, circuit board 420 may be implemented with circuitry that performs the necessary functions, such as communication with sensor 410 and / or external devices. For example, a communication module for communicating with the sensor 410 and / or an external device, a memory and / or storage for receiving and storing a sensing signal from the sensor 410, a radon concentration calculation and calculation A timer for counting a predetermined time period, a power source circuit for supplying a part of the power source supplied from the outside or the power source supplied from the outside to the sensor 410, As shown in Fig.

In the illustrated embodiment, the measuring device includes a communication line 430 for communicating with an external device (e.g., an external computing device or a display device) via a cable 41 and a power line 440 for receiving power from the outside . For example, a control signal for controlling the sensor 410 and / or the circuit board 420 via the communication line 430 and for receiving the sensing signal measured by the sensor 410 and / May be transmitted to the outside.

In an alternative embodiment, the radon measurement device may communicate with an external device using a wireless communication scheme such as WiFi or Bluetooth, in which case the wired communication line 430 may be omitted. In other alternative embodiments, the measuring device may also include its own power source, such as a battery, in which case the power line 440 may be omitted.

6 is a block diagram of an apparatus for measuring radon according to an embodiment. It will be appreciated from FIG. 6 that only the major components needed to perform the radon measurement in accordance with one embodiment of the present invention are shown in block diagrams and that unnecessary or additional components are omitted.

In one embodiment shown, the radon measuring device includes a sensor 410, an amplifier 421, a signal processing unit 423, and a communication unit 425. The sensor 410 is a sensor for detecting the beta particles generated in the radioactive decay of radon as described above, and may be implemented, for example, as a pin photodiode.

In one embodiment, the amplifier 421, the signal processing unit 423, and the communication unit 425 may be implemented by circuit elements mounted on the circuit board 420. The amplifier 421 may perform a function of amplifying a signal sensed by the sensor 410 and may be implemented, for example, as an OP AMP.

In one embodiment, the signal processing unit 423 can perform an operation of distinguishing the detection signal by the beta particle from the detection signal received from the sensor 410. In the case of the sensor 410 implemented with a pin photodiode, a sensor having a waterproof structure is used. Since the alpha particle can not move in the water and can not pass through the sensor 410 having the waterproof structure, Will detect beta particles and gamma rays. The signal processing unit 423 determines whether or not the beta signal is detected based on the magnitude of the detection signal (pulse) received from the sensor 410 because the pulse magnitude when the pin photodiode senses the beta particle is different from the pulse magnitude when the gamma ray is sensed. The radon concentration can be calculated by extracting only the detection signal by the particle. Thereafter, the signal processing unit 423 can perform a function of converting the radon concentration value calculated based on the beta particle detection signal into a standard unit for displaying the radon concentration and outputting it.

For example, the signal processing unit 423 may be implemented with software programmed to perform hardware operations, such as an analog-to-digital converter (ADC), a processor, a memory, and the like, and loading and storing a radon concentration.

The communication unit 425 can perform a function of transmitting data calculated by the signal processing unit 423 to an external device. For example, the radon measuring device according to the present invention may be connected to an external device such as an external gateway, a portable computer, a desktop computer, a server, or the like through a communication line 430 or a wired / wireless communication network such as a WiFi, a WSN, a LAN, a Bluetooth, When it is connected, the communication unit 425 can transmit the radon concentration value calculated by the signal processing unit 423 to the external device.

 In an alternative embodiment, at least some of the functionality of the signal processing section 423 may be performed in a device external to the radar measurement device. For example, the function of calculating the radon concentration in the standard unit from the detection signal regarding the radon concentration detected by the sensor 410 may be performed in the external device. In this case, the detection signal of the sensor 410 may be transmitted to the outside May be transmitted to the device.

An exemplary method for measuring the radon concentration in the fluid by the sensor 410 will now be described with reference to Figures 7-9. According to one embodiment of the present invention, a virtual space ("virtual chamber") within a distance from the sensor 410 is set and the beta particles detected by the sensor 410 are beta particles The radon concentration can be measured.

7 and 8 are views for explaining a virtual chamber according to an embodiment. In the figure, it is assumed that a measuring device 40 with a sensor 410 attached to its lower surface is disposed in a fluid (e.g., groundwater). The sensor 410 is positioned such that the sensing surface of the sensor 410 is exposed to the fluid to detect the beta particles produced by the radon in the fluid. That is, the sensing surface 411 of the sensor 410 in the figure is directed downward. A virtual space having a radius of a predetermined distance (hereinafter also referred to as a "measurable radius") from the center of the sensing surface 411 of the sensor at this time will be referred to as a virtual chamber 450.

The virtual chamber 450 is a three-dimensional hemispherical space. That is, when the lower surface of the measuring apparatus 40 is flat and the sensing surface 411 is disposed facing downward as shown in the drawing, a measurable radius in the left and right horizontal directions along the lower surface of the measuring apparatus at the center of the sensing surface 411 The space of this virtual chamber 450 is defined by a circle 451 having a measurable radius R and a hemisphere 453 having a measurable radius R at the center of the sensing surface 411 below the measuring device 40 .

In one embodiment, the measurable radius R, which is the radius of the virtual chamber 450, means the maximum effective distance over which the sensor 410 can detect beta particles. The value of the measurable radius R is determined by whether the beta particles in the fluid reach the sensing surface 411 and the sensor 410 is able to detect this beta particle.

In one embodiment, when the sensor 410 detects beta particles within a certain distance from the sensor and can not detect beta particles farther than the predetermined distance, Lt; / RTI >

For example, as shown in Fig. 4, when the first beta particle 1 is located at the first distance r1 from the sensing surface 411 and the second beta particle 2 is located at the second distance r2 Assuming that the sensor 410 is able to sense the first beta particle 1 but not the second beta particle 2, the measurable radius R is the sum of the first distance rl and the second And the distance r2. In this way, the measurable radius R for a particular sensor 410 can be determined in advance through experiments.

At this time, the value of the measurable radius R may be a function of the type of the sensor, the characteristics of the fluid, and the like. For example, if the fluid is water, since the movement of radon in water is known to be about 1 cm to several tens cm, the measurable radius R can be determined within this range. In one embodiment, the measurable radius according to the sensor type and the fluid characteristics is measured in advance and made into a look-up table. In the actual radon concentration measurement, the measurable radius in the lookup table according to the specific sensor 410, R) values are retrieved and specified, and the radon concentration can be measured using this specified value.

In this way, the virtual chamber 450 has a hemispherical space within the effective radius (R) distance from the sensor 410, but the volume of the virtual chamber 450 may vary depending on the size and shape of the reservoir for storing the fluid, for example. 7 and 8, it is assumed that the size of the fluid reservoir is larger than the measurable radius R so that the size or shape of the fluid reservoir does not affect the volume of the virtual chamber 450. [ However, when the radon measuring device 40 measures radon in, for example, a very narrow vessel, the virtual chamber 450 can not be perfectly hemispherical as shown in FIGS. 7 and 8, resulting in a virtual chamber 450 May have a hemispherical space with a measurable radius R from the center of the sensor 410 at most within the constraint of the space of the fluid reservoir. Such a case will be described later with reference to Fig.

FIG. 9 is a flowchart for explaining a radon measurement method using the virtual chamber 450 according to an embodiment. In the radon measurement method according to the embodiment, the sensor 410 detects the beta particles during a predetermined time period, converts the detection number of the detected beta particles during this period into a standard unit for expressing the radon concentration, Step < / RTI >

Specifically, in step S310 of FIG. 9, before measuring the radon with the radon measuring device 40, the measurable radius R is measured according to the specification of the radon measuring device 40 or the characteristic of the object to be measured (fluid) . In one embodiment, the measurable radius R may be pre-matched and stored in a table (e.g., a look-up table) according to the type of sensor 10 or fluid characteristics, When entered, the effective radius that matches it can be selected.

Although the step S310 of setting the effective radius is described as the first step performed in the illustrated embodiment, in the alternative embodiment, the step S310 is performed in the step S340 of converting into a standard unit to be described later . That is, after detecting the beta particles for a predetermined time (S320 and S330), the measurable radius may be set in step S340 of converting the detected value into a standard unit.

Referring again to the drawing, after the measurable radius R is set, the process proceeds to step S320, where the sensor 410 of the radar measuring device 40 detects the beta particles. For example, the sensor 410 may detect the beta particles produced by the radioactive decay of radon in the fluid in the virtual chamber 450. In one embodiment, the sensor 410 may sense a signal generated when the beta particles collide with the sensing surface 411 to count the number of detection of the beta particles.

In one embodiment, the sensing operation of the sensor 410 may continue for a predetermined predetermined period of time. In this case, the 'predetermined period' may be set to one hour or two hours, for example, and may be changed according to a specific embodiment.

In step S330, the radar measuring device 40 can determine whether the predetermined period has elapsed. For example, the signal processing unit 423 includes a timer function, and it can be determined whether a predetermined period has elapsed by the timer function.

If it is determined in step S330 that the predetermined period has elapsed, the flow advances to step S340 to convert the number of detected beta particles detected during the predetermined period into a standard unit for expressing the radon concentration.

In one embodiment, the standard unit may be becquerel per unit area (Bq / m < 3 >). In general, Bq / ㎥ is used as a criterion for judging whether or not the radon is harmful to human body. For example, according to the indoor air quality management method such as multi use facility, the radon recommendation standard value is set at 148 Bq / ㎥. Accordingly, in step S340, the number of times of detection of the number of the detected beta particles per volume of the virtual chamber according to the predetermined period and the effective radius is converted into the unit of Becquerel per unit area.

In this case, in one embodiment, the step S340 converts the number of times of detection of the number of the beta particles counted for each predetermined period for each predetermined period in a standard unit. For example, assuming that the predetermined period is one hour, the number of detection of the beta particles measured for one hour every hour is converted into a standard unit, and the resultant value thus converted means the radon concentration every hour will be. By outputting the radon concentration value measured every cycle as described above, there is an advantage that the increase / decrease tendency of the radon can be confirmed in real time.

In an alternative embodiment, step S340 may convert the number of detection of the counted beta particles over a period of time that is accumulated two or more times in a plurality of times, in standard units. For example, during the first one-hour period, the radon concentration is converted based on the number of detected beta- particle detections during this one hour, and during the next two-time period (i.e., during the entire two-hour period including the preceding one hour , The output value is a cumulative average of the radon concentrations during a certain period of time. By outputting the average radon concentration thus obtained, It is possible to reduce the error of the concentration and prevent the radon concentration measurement value from being distorted by the temporary fluctuation. In yet another alternative embodiment, step S340 may yield radon concentrations, respectively, in the two ways described above. That is, it is possible to calculate the radon concentration for each cycle for each cycle, and at the same time, calculate the average radon concentration during the cumulative time from the past specific point to the latest last cycle, and output them.

Next, in step S350, the radon concentration value converted into the standard unit is output. The 'output' in this step S350 may include, for example, an operation of transmitting the radon concentration value to the control unit 30 through the communication line 430 or wireless communication.

Figure 10 shows an example of the use of a radon measuring device comprising a driving fan according to an alternative embodiment. Referring to the drawings, at least one driving fan 460 and 470 can be disposed under the radon measuring device 40. In the illustrated embodiment, the first drive fan 460 and the second drive fan 470 are disposed outside the virtual chamber 450. The first drive fan 460 is disposed longitudinally in the fluid so that fluid can flow in a horizontal direction toward the virtual chamber 450. [ The second driving fan 470 is disposed horizontally in the lower direction of the radon measuring device 40 and allows the fluid to flow in the vertical direction toward the virtual chamber 450. In another embodiment, the driving fan may be disposed in any direction, unlike the one shown in the drawing.

Generally, when the fluid does not flow, the number of detection of the beta particles produced by the radon in the virtual chamber 450 is gradually reduced even if it is large at the beginning of the measurement, so that the accurate radon concentration in the fluid can not be known. Therefore, by driving at least one of the driving fans 460 and 470 as in the illustrated embodiment, the fluid in the virtual chamber 450 flows in an arbitrary direction without stagnation, and an advantage that measurement error in measuring the radon concentration in the fluid can be reduced have.

A virtual chamber according to another alternative embodiment will now be described with reference to FIG.

7 and 8, it is assumed that the size of the storage means for storing the fluid, such as the reservoir, the reservoir, the water tank, etc., is much larger than the measurable radius R.

However, for example, as shown in FIG. 8, when only the radius (W / 2) of the tube is smaller than the measurable radius R, only a part of the entire space within the radius R should be calculated as the virtual chamber 450 '. To this end, according to one embodiment, it is desirable to obtain information about the width W of the well and the distance d from the lower surface to which the sensor 410 of the radon measuring device 100 is attached to the bottom of the well.

In one embodiment, the radon measuring device 40 may further include a level sensor 480 to measure the distance d from the lower surface of the radon measuring device 40 to the bottom of the hall. The level sensor 480 is installed on the lower surface of the radon measurement device 40 and can measure the distance d by sensing a return signal after emitting a laser or an ultrasonic wave toward the bottom of the well.

The width W of the tube may be a value that the user knows in advance or may be obtained by a user's own measurement. As another example, when one or more distance sensors (not shown) are mounted on the side of the radon measuring apparatus 40 The width (W) of the tube can be measured using this distance sensor.

When the information about the width W and the depth d of the tube is obtained and the measurable radius R considering the sensor 410 and fluid characteristics is selected in advance, ) Can be obtained. 9, the number of times of detection of the detected beta particles per volume of the virtual chamber 450 'for a predetermined predetermined period is calculated by using the virtual chamber 450' .

12 to 14, a radar measuring apparatus according to still another alternative embodiment will be described. In this alternative embodiment, the radon measuring device has a fluid container 500 coupled to the bottom of the measuring device.

12 and 13 schematically illustrate a fluid container according to an embodiment, FIG. 12 schematically shows a cross section of a measuring device 40 and a fluid container 500, FIG. 13 shows a measuring device 40 A perspective view of the fluid container 500 is schematically shown.

Referring to the drawings, the fluid container 500 may have a cylindrical shape having a circular or polygonal cross section, and the lower surface of the tubular shape may be closed and at least a part of the upper surface may have an open shape. The upper surface of the fluid container 500 is detachably coupled to the measuring device 40 so that the lower surface of the measuring device 40 is inserted into the open portion of the upper surface of the fluid container 500 So that the sensing surface of the sensor 410 can be disposed to face the inside of the fluid container through the open portion of the upper surface of the fluid container 500. [

Although not shown in the drawings, the combination of the measuring instrument body 100 and the fluid container 500 may be realized by any known coupling method. For example, the bottom surface or the side surface of the measuring instrument body 100 may have thread-like projections and depressions formed thereon, and a thread corresponding to the thread may be formed on the upper surface of the fluid container 500, You can turn it off and off. In other embodiments, the measuring device 40 and the fluid container 500 may be coupled using a fastening means such as a bolt and a nut, or any other known fastening structure may be used. It will be understood that the present invention is not limited to the fastening method.

In one embodiment, the fluid vessel 500 is disposed within the space of the virtual chamber 450. That is to say the volume of the fluid container 500 should be equal to or less than the volume of the virtual chamber 450 and also that no part of the fluid container 500 should leave the virtual chamber 450, It is preferable that the shape and the size of the lens are determined.

As long as the above constraint is satisfied, the fluid container 500 may have any shape and size. For example, although a cylindrical fluid container 500 is shown in the illustrated embodiment, in alternate embodiments, the fluid container may have a tubular shape with a polygonal cross-section. As another example, the fluid container 500 may have a hemispherical shape like the virtual chamber 450.

In order to accurately measure the radon gas produced in the fluid in the fluid container 500, it is important that the fluid in the fluid container 500 is continuously exchanged. That is, the fluid in the container 500 does not remain in the container, and new fluid is continuously introduced into the container 500 and the existing fluid must be discharged to the outside of the container 500, At least one fluid inlet 510 and at least one fluid outlet 520 for the inflow / outflow of the fluid.

In the illustrated embodiment, the fluid container 500 includes an inlet 510 and an outlet 520 each having a circular through-hole shape. However, the number and shape of the inlet 510 and the outlet 520 may vary depending on the embodiment. For example, a plurality of inlets 410 and outlets 420 may be formed, and the inlets 510 and outlets 520 may have a slot shape. Further, although the inlet 510 and the outlet 520 are formed on the side surface of the fluid container 500 in the illustrated embodiment, the positions of the inlet 510 and the outlet 520 may vary depending on the embodiment.

The material of the fluid container 500 is not particularly limited. In a preferred embodiment, the fluid container 500 may be made of any material that can not pass through the beta particles. In one embodiment, fluid container 500 may be formed of plastic.

14 is a flow chart illustrating a method for measuring radon by a radon measuring apparatus including the fluid container 500 according to an embodiment. In the radon measurement method according to the embodiment, the sensor 410 detects the beta particles during a predetermined time period, converts the detection number of the detected beta particles during this period into a standard unit for expressing the radon concentration, Step < / RTI >

Specifically, in step S410 of FIG. 14, the measurable radius R is set in advance according to the specification of the radon measuring apparatus or the characteristics of the object (fluid) to be measured before measuring the radon with the radon measuring apparatus. In one embodiment, the measurable radius R may be pre-matched and stored in a table (e.g., a look-up table) according to the type or fluid characteristics of the sensor 410, When entered, the measurable radius matched to it can be selected.

In this step S410, when the measurable radius is set, the virtual chamber 450 whose radius is the measurable radius is also determined. Therefore, in step S420, the fluid container 500 having a size and shape that does not leave the virtual chamber 450 may be installed in combination with the radon measuring device. It goes without saying that this step S420 may be omitted if the fluid chamber 500 suitable for the virtual chamber 450 is pre-coupled.

Thereafter, the flow advances to step S430 to detect the beta particles by the sensor 410 of the radon measuring apparatus. The sensor 10 can detect the beta particles produced by the radioactive decay of radon in the fluid in the fluid container 500. In one embodiment, the sensor 410 may sense a signal generated when the beta particles collide with the sensing surface 411 to count the number of detection of the beta particles.

In one embodiment, the sensing operation of this sensor 410 may continue for a predetermined predetermined period of time. In this case, the 'predetermined period' may be set to one hour or two hours, for example, and may be changed according to a specific embodiment.

Next, in step S40, the radon measuring device can judge whether or not the predetermined period has elapsed. For example, the signal processing unit 423 includes a timer function, and it can be determined whether a predetermined period has elapsed by the timer function.

If it is determined in step S440 that the predetermined period has elapsed, the flow advances to step S450 to convert the detected number of the detected beta particles into the standard unit for expressing the radon concentration. In one embodiment, the standard unit may be becquerel per unit area (Bq / m < 3 >). Accordingly, in step S450, the operation of converting the predetermined number of times of detection of the detected predetermined number of particles per volume of the fluid container 500 into the predetermined period and the unit of becquerel per unit area is performed.

In this case, in one embodiment, the step S450 converts the number of detection of the number of beta particles counted for each predetermined period for each predetermined period in a standard unit. For example, assuming that the predetermined period is one hour, the number of detection of the beta particles measured for one hour every hour is converted into a standard unit, and the resultant value thus converted means the radon concentration every hour will be. By outputting the radon concentration value measured every cycle as described above, there is an advantage that the increase / decrease tendency of the radon can be confirmed in real time.

In an alternative embodiment, step S450 may convert the number of detection of the counted beta particles over a period of time that is accumulated more than once in a plurality of times, in standard units. For example, during the first one-hour period, the radon concentration is converted based on the number of detected beta- particle detections during this one hour, and during the next two-time period (i.e., during the entire two-hour period including the preceding one hour , The output value is a cumulative average of the radon concentrations during a certain period of time. By outputting the average radon concentration thus obtained, It is possible to reduce the concentration error and prevent the measurement value of the radon concentration from being distorted by the temporary fluctuation. In yet another alternative embodiment, step S450 may calculate the radon concentration, respectively, in the two ways described above. That is, it is possible to calculate the radon concentration for each cycle for each cycle, and at the same time, calculate the average radon concentration during the cumulative time from the past specific point to the latest last cycle, and output them.

Next, in step S460, the radon concentration value converted into the standard unit is output. The 'output' may include, for example, transmitting the radon concentration value to the control unit 30 via the communication line 430 or wireless communication.

Fig. 15 is a view for explaining a radon measuring apparatus according to an alternative embodiment having another fluid container 500. Fig. Referring to the drawings, fluid container 500 may include drive fans 530 and 540 that generate fluid flow. In the illustrated embodiment, the first drive fan 530 is installed in the fluid inlet 510 and the second drive fan 540 is installed in the fluid outlet 520.

The driving fans 530 and 540 are for generating a flow of fluid around the fluid container 500. Accordingly, the number and the installation positions of the driving fans 530 and 540 can be variously modified. For example, in the illustrated embodiment, both the inlet 510 and the outlet 520 are provided with drive fans 530 and 540, but in an alternative embodiment, only one of the inlet 510 and the outlet 520, May be provided.

Generally, when the fluid is not flowing in the fluid container 500, the number of detection of the beta particles produced by the radon in the fluid container 500 is gradually reduced even if it is large at the beginning of the measurement, I will not. Accordingly, by driving and driving one or more driving fans 530 and 540 as in the illustrated embodiment, a new fluid flows into the fluid container 500 and the existing fluid in the fluid container 500 is discharged to the outside, There is an advantage that the measurement error can be reduced in the measurement of the radon concentration in the sample.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents. And should be determined by equivalents to the scope of the appended claims.

10: Pumping water pump
20: Water tank
30:
40, 220: Radon measuring device
410: sensor
450: virtual chamber
500: fluid container

Claims (23)

As a constant supply system,
A pumping pump (10) for pumping groundwater of the reservoir;
A water tank 20 storing the pumped ground water as supply water, and including a water level sensor 230 and an impeller 240 therein;
A radon measuring device (40, 220) installed in at least one of the tank and the water tank; And
And a controller (30) configured to receive measured values from the level measuring sensor and the radon measuring device, respectively,
Wherein the control unit controls the operation of the amphibious pump based on the water tank level measured by the level measuring sensor and controls the operation of the amphibious pump and the impeller based on the radon concentration value of the groundwater or feedwater measured by the radon- And to control the operation of the < RTI ID =
Wherein the radon measuring device includes a sensor capable of detecting beta particles,
Wherein the sensor is capable of detecting beta particles produced by radon in a virtual chamber, which is a virtual hemispherical space having a predetermined radius from the center of the sensor in the tub or water tank,
Wherein the predetermined radius of the virtual chamber is set to a maximum distance at which the sensor can detect the beta particles in the groundwater or feed water. The water treatment system according to claim 1,
A supply pipe (22) for supplying the supply water in the water tank to the outside; And
And an open / close valve (221) installed in the supply pipe for controlling the amount of opening and closing by the control unit. 3. The method according to claim 2, wherein when the radon measuring device is installed in the well,
Wherein the controller controls the pump to control the pump to stop the pump or to reduce the amount of water and to drive the impeller for a predetermined time to degas the radon gas in the feed water when the measured radon concentration is larger than the reference value Constant supply system. The method of claim 3,
Wherein the control unit at least partially closes the open / close valve when the measured radon concentration is larger than the reference value, and controls the opening / closing valve to be opened after degassing the radon gas for the predetermined time. The method of claim 2, wherein when the radon measuring device is installed in a water tank,
Wherein the control unit controls the pump to control the pump to reduce the amount of water and to discharge the radon gas in the supply water by driving the impeller for a predetermined period of time when the measured radon concentration is larger than the reference value, And to receive an updated radon concentration measurement of the radon measurement device. 6. The method of claim 5,
Wherein the control unit at least partially closes the open / close valve when the measured radon concentration is larger than the reference value, and opens the open / close valve when the measured radon concentration is less than the reference value. delete The constant supply system according to claim 1, further comprising a signal processing unit for converting a value detected by the sensor into a standard unit and outputting the converted value. 9. The constant supply system according to claim 8, wherein the signal processing unit counts the number of times of detecting the number of beta particles every predetermined period of time, and converts the count value into a standard unit and outputs the counted value. The method according to claim 9, wherein the signal processing unit converts the number of beta particle detection times for each predetermined period in each of the time periods and outputs the number of times of detection of the number of beta particles during the accumulated time period of two or more times And outputting the converted value. The radon measuring apparatus according to claim 1,
A meter main body having a sensor capable of detecting beta particles; And
And a fluid container coupled to the main body of the meter and having at least one fluid inlet and a fluid outlet,
A sensing surface of the sensor is disposed facing the interior of the fluid container,
Characterized in that the fluid container is located in the region of the virtual chamber defined by a virtual hemispherical space having a predetermined radius from the center of the sensor. 12. The method of claim 11,
The predetermined radius is set to a maximum distance at which the sensor can detect the beta particles in the ground water or the feed water,
Characterized in that the fluid container is formed of a material through which the beta particles can not pass. The constant supply system according to claim 11, further comprising a signal processing unit for converting the value detected by the sensor into a standard unit of radon concentration and outputting it. 14. The constant supply system according to claim 13, wherein the signal processing unit counts the number of times of detecting the number of beta particles every predetermined time period and outputs the counted value in a standard unit. A pumping pump for pumping groundwater in the reservoir; A water tank for storing groundwater pumped from the reservoir and equipped with an impeller; A supply pipe for supplying the supply water stored in the water tank to the outside; An on-off valve provided in the supply pipe; And a control unit for controlling the pumping pump, the impeller, and the on-off valve, the method comprising:
(a) controlling the operation of the amphibious pump based on the measured water level of the feed water so that the feed water in the water tank is maintained at a water level within a predetermined range;
(b) measuring the concentration of radon contained in the ground water or the supplied water and transmitting the measured radon concentration to the control unit; And
(c) controlling the operation of the on-off valve installed in the supply pipe connected to the water pump, the impeller, and the water tank based on the measured radon concentration value of the ground water or the supply water; Including,
Wherein the step (b)
Detecting beta particles for a predetermined period of time by a sensor disposed in the tub or water tank and capable of detecting beta particles in groundwater or feed water; And
Converting the detected value into a standard unit and transmitting the converted value to the control unit,
Wherein the sensor detects the beta particles generated by the radon in the virtual chamber defined by a virtual hemispherical space having a predetermined radius from the center of the sensor in the detecting step. [16] The method of claim 15, wherein, when the radon concentration of the groundwater measured in step (b) is greater than a reference value,
Controlling the amphibious pump to stop the amphibious water flow or reduce the amount of pumped water, at least partially closing the opening / closing valve, and driving the impeller for a predetermined time to degas the radon gas in the feed water; And
And controlling to open the on-off valve after degassing the radon gas for the predetermined time. 16. The method of claim 15, wherein if the radon concentration of the feed water measured in step (b) is greater than a reference value,
Controlling the amphibious pump to stop the amphibious water flow or reduce the amount of pumped water, at least partially closing the opening / closing valve, and driving the impeller for a predetermined time to degas the radon gas in the feed water;
Updating radon concentration measurements of the feed water; And
And controlling to open the on-off valve when the updated radon concentration measurement value is less than or equal to a reference value. delete 16. The method of claim 15, wherein the predetermined radius of the virtual chamber is set to a maximum distance at which the sensor can detect beta particles in the groundwater or feedwater. 16. The method of claim 15, wherein the step of detecting the beta particles comprises the step of counting the number of times of detecting the number of beta particles for each predetermined period of time in a plurality of predetermined time periods. 16. The method of claim 15, wherein step (b)
Detecting beta particles for a predetermined period of time by a sensor disposed in the tub or water tank and capable of detecting beta particles in groundwater or feed water; And
Converting the detected value into a standard unit of radon concentration, and transmitting the converted value to the control unit,
Wherein the sensor in the detecting step detects the beta particles produced by the radon in the fluid contained in the fluid container surrounding the sensing surface of the sensor,
Characterized in that the fluid vessel is located in the region of the virtual chamber defined by a virtual hemispherical space having a predetermined radius from the center of the sensor. 22. The method of claim 21, wherein the predetermined radius of the virtual chamber is set to a maximum distance at which the sensor can detect beta particles in the groundwater or feedwater. The method of claim 21, wherein the step of detecting the beta particles comprises the step of counting the number of times of detection of the beta particles for each predetermined period of time in a plurality of predetermined time periods.

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