KR101896802B1 - RADON DETECTION SYSTEM USING IMAGE SENSOR MODULE USING Logic circuit OUTPUTTING DIGITAL INFORMATION AND DETECTION METHOD THEREOF - Google Patents

RADON DETECTION SYSTEM USING IMAGE SENSOR MODULE USING Logic circuit OUTPUTTING DIGITAL INFORMATION AND DETECTION METHOD THEREOF Download PDF

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KR101896802B1
KR101896802B1 KR1020160167073A KR20160167073A KR101896802B1 KR 101896802 B1 KR101896802 B1 KR 101896802B1 KR 1020160167073 A KR1020160167073 A KR 1020160167073A KR 20160167073 A KR20160167073 A KR 20160167073A KR 101896802 B1 KR101896802 B1 KR 101896802B1
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radon
image sensor
unit
information
detection system
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KR1020160167073A
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Korean (ko)
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KR20180066394A (en
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김규식
오태규
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서울시립대학교 산학협력단
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N23/00Investigating or analysing materials by the use of wave or particle radiation not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
    • G01N23/22Investigating or analysing materials by the use of wave or particle radiation not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by measuring secondary emission from the material
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01TMEASUREMENT OF NUCLEAR OR X-RADIATION
    • G01T5/00Recording of movements or tracks of particles; Processing or analysis of such tracks
    • G01T5/002Recording of movements or tracks of particles; Processing or analysis of such tracks using a combination of several movement of track recording devices
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2223/00Investigating materials by wave or particle radiation
    • G01N2223/10Different kinds of radiation or particles
    • G01N2223/1006Different kinds of radiation or particles different radiations, e.g. X and alpha

Abstract

The present invention relates to an invention for detecting radon in air and measuring a concentration ratio using an image sensor module having a digital output. A radon detection system for calculating a radon concentration in a room according to an embodiment of the present invention includes: a chamber for blocking light coming in from the surroundings; The plasma display apparatus according to claim 1, further comprising: a voltage generator for generating a voltage according to an application of an alpha ray generated in the radon in the chamber, And binarizes the image data included in each frame of the signal and outputs the first information when the binarized image data has pixels having a predetermined reference value or more and if the binarized image data has pixels below the reference value, An image sensor for outputting an image; And a controller for counting the number of the first information and calculating the indoor radon concentration using the counted first information.

Description

TECHNICAL FIELD [0001] The present invention relates to a radon detection system and an image detection method using an image sensor module having a digital output to which a logic circuit is applied.

The present invention relates to an invention for detecting radon in air and measuring a radon concentration using an image sensor module having a digital output.

In the UNSCEAR 2000 report, the global average of the annual exposure dose received by the general public in the natural environment is reported to be 2.4 mSv / yr. Among them, the radiation dose by radon and daughter radionuclides is 1.3mSv / yr which accounts for more than 50% of the total.

According to the National Radiation Risk Assessment Report released by the Korea Nuclear Safety Institute, the total effective exposure dose of the people by natural radiation source is 2.99mSv / yr, and the internal exposure by the radon inhalation is 1.41mSv / yr. It accounts for about 47%, and it is said that it makes the highest contribution to exposures.

At this time, Radon is one of the most well known natural radionuclides, an intangible, colorless, inert gas and emits radiation in the process of decay. Exposure by radon is caused by an alpha ray deposited on the surface of the respiratory organs produced by the radon decay, and when it is inhaled into the human body by respiration, it causes problems to the body such as destroying the lung tissue.

In particular, exposure to radon can be caused by long - term exposure to high concentrations of radon, since it is caused by the alpha rays that are deposited on the surface of the respiratory tract and released by radon decay.

The International Commission on Radiological Protection recommends establishing national radon reference levels through recommendations, and in many countries around the world, there is a tendency to conduct large-scale indoor radon surveys at the government level, and based on these findings, It is establishing a policy for radiation protection through evaluation of national exposure dose.

This method of measuring the radon concentration is most often used to detect radiation emitted from radon and daughter radionuclides. Typical detectors include a pulse ionization chamber, a packed ion chamber, a ZnS (Ag) scintillation detector, a surface barrier silicon detector or a diffusion junction detector, NaI (TI) or HPGe. Among them, the most widely used detectors are divided into integral type, continuous type and collective type depending on the detection type, and they are classified into active type and passive type according to the operation mode of the detector. In addition, it can be classified into a counting rate system that continuously indicates the measurement value and an integral type that indicates the cumulative exposure amount.

The counting meter is mainly used for immediate measurement and is useful for measuring the variation of the radon concentration over time in the detection area. Integral detectors, on the other hand, are mainly used for long-term measurements ranging from weeks to months, and average radon concentrations over a period of time can be obtained.

The radon meters described above are conventionally expensive and thus can not be easily distributed. This is because a high-performance processor must be present to confirm the radon concentration. Therefore, there is a need for a radon detector capable of measuring real-time radon concentration at a lower cost.

Korea Patent Office Registration No. 10-1415859 Korea Patent Office Registration No. 10-0957116 Korean Patent Application Publication No. 10-2015-0114347 Korean Patent Registration No. 10-1514251

It is an object of the present invention to provide a user with a radon detection system capable of detecting an alpha ray generated in a radon using an image sensor module having a digital output in real time.

It is also an object of the present invention to provide a user with a radon detection system that can confirm the radon concentration in the atmosphere through the amount of radon detected during a predetermined time.

It is also an object of the present invention to provide a user with a radon detection system capable of detecting real-time radon at low cost.

In addition, a simple logic circuit for radon detection is proposed, and a method for manufacturing a radon detector using a low-performance and low-cost MCU is proposed.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. It can be understood.

In order to solve the above-mentioned problem, a radon detection system for calculating a radon concentration of a room includes a chamber having a structure in which light coming in from the surrounding is blocked and air is circulated; The plasma display apparatus according to claim 1, further comprising: a voltage generator for generating a voltage according to an application of an alpha ray generated in the radon in the chamber, And binarizes the image data included in each frame of the signal and outputs the first information when the binarized image data has pixels having a predetermined reference value or more and if the binarized image data has pixels below the reference value, An image sensor for outputting an image; And a controller for counting the number of the first information and calculating the indoor radon concentration using the counted first information.

Also, the binarized image data is represented by N bits, and the image sensor applies a logic circuit including at least one of an AND gate (GATE) and an OR gate to at least one of the N bits, It can be determined whether or not the image data has pixels equal to or larger than a preset reference value.

In addition, the number of the first information may be determined according to the number of application of the alpha ray according to the voltage change.

In addition, the image sensor may include a complementary metal-oxide semiconductor (CMOS).

In addition, the sensor cover glass disposed on the image sensor may be removed so that the alpha-ray can be applied.

And a radio communication unit for transmitting the calculated indoor radon concentration to a server via the Internet, wherein the plurality of radon detection systems is a plurality of radon detection systems, And receive an alarm from the server if the radon concentration statistically measured at the server exceeds a reference value.

In order to solve the above-mentioned problem, a radon detecting method for calculating a radon concentration in a room includes a first step of blocking light coming in from a surrounding area and circulating air, A second step in which an image sensor positioned in the chamber generates electrons according to application of an alpha ray generated in the radon in air; A third step of the image sensor outputting a change of the voltage as a digital image signal when a voltage output through the generated electrons is changed; A fourth step of the image sensor binarizing the image data included in each frame of the digital image signal; A fifth step of outputting first information when the image sensor has pixels having a predetermined reference value or more and outputting second information if the binarized image data has pixels less than the reference value; A sixth step of the control unit counting the number of the first information; And a seventh step of calculating the radon concentration of the room by using the number of the first information counted by the control unit.

Also, the binarized image data is represented by N bits, and the fifth step is a logic circuit in which the image sensor includes at least one of an AND gate (GATE) and an OR gate for at least one of the N bits It is possible to determine whether or not the binarized image data has pixels having a predetermined reference value or more.

In addition, the number of the first information may be determined according to the number of application of the alpha ray according to the voltage change.

The present invention can accurately determine the amount of atmospheric radon through alpha ray detection and can protect human health through radon detection.

Radon is a first-level carcinogen, which is very lethal to modern people. The present invention can detect the concentration of radon in a closed space such as a building or a subway, thereby enabling the ventilation system to operate and contribute to public health.

Further, the present invention can measure the radon concentration more precisely than the conventional radon measurement using the gamma ray, and can reduce the calculation error according to the measured value using the high performance processor.

In addition, the present invention can mount more than one sensor according to the electrical stability of the measuring instrument and the processor's goodness, thereby ensuring better performance than the existing radon measuring apparatus.

Current radon concentrations are also of interest to national, business and public, and must be monitored and observed for health. However, since a reliable apparatus for measuring the radon is not currently available, it is considered that the spread of the reliable radon measuring apparatus according to the present invention is highly marketable.

In addition, through the spread of the radon measuring terminal according to the present invention, a server system for collecting, processing and managing the radon concentration measured at the terminal, a communication network for transmitting the measured radon concentration to the server, and a closed- It can be used actively in various fields such as being utilized.

In addition, a simple logic circuit for detecting radon can be constructed to provide a method for manufacturing a radon detector using a low-performance and low-cost MCU.

It should be understood, however, that the effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those skilled in the art to which the present invention belongs It will be possible.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate a preferred embodiment of the invention and, together with the description, serve to provide a further understanding of the technical idea of the invention, It should not be construed as limited.
1 is an example of a radon detection system block that can be applied to the present invention.
FIG. 2 is an example of a block diagram showing a connection between a radon detection system and a server that can be applied to the present invention.
3 is a flow diagram of a radon detection method that can be applied to the present invention.
4 is a block diagram of a radon detection system using an image sensor module having a digital output proposed by the present invention.
5 is a block diagram of a radon detection sensor unit and a radon detection determination unit of a radon detection system using an image sensor module having a digital output according to the present invention.
6 is a block diagram of a radon detection sensor unit used in a radon detection system using an image sensor module having a digital output according to the present invention.
7 is a block diagram of a controller used in a radon detection system using an image sensor module having a digital output according to the present invention.
8 is a view for explaining a process of counting data corresponding to radon using the image sensor module included in the radon detection determination unit according to the present invention.
9 is another diagram for explaining a process of counting data corresponding to radon using the image sensor module included in the radon detection determination unit according to the present invention.
10 is a flowchart of a radon detection method using a radon detection system using an image sensor module having a digital output according to the present invention.
11 illustrates an example of a block diagram of a radon detection sensor unit, a control unit, and a logic circuit unit of a radon detection system using an image sensor module having a digital output and a logic circuit according to the present invention.
12 shows an example of a logic circuit applied to a radon detection system using a logic circuit and an image sensor module having a digital output according to the present invention.
13 is a flowchart of a radon detection method using an image sensor module having a digital output and a logic circuit according to the present invention.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. In addition, the embodiment described below does not unduly limit the contents of the present invention described in the claims, and the entire configuration described in this embodiment is not necessarily essential as the solution means of the present invention.

First, the basic configuration of a radon detection system applied to the present invention will be described.

1 is an example of a radon detection system block that can be applied to the present invention.

1, a radon detection system 100 includes a radio communication unit 110, a radon detection sensor unit 120, a user input unit 130, an air purification unit 140, An output unit 150, a memory 160, a control unit 180, and a power supply unit 190.

The wireless communication unit 110 may include one or more modules that enable wireless communication between the radon detection system 100 and the wireless communication system or between the radon detection system 100 and the network in which the radon detection system 100 is located . In addition, the sensor unit 120 and the control unit 180 may include a bayon module to enable wireless communication.

For example, the wireless communication unit 110 may include a mobile communication module 112, a wireless Internet module 113, a short distance communication module 114, a location information module 115, and the like.

The mobile communication module 112 transmits and receives a radio signal to at least one of the base station and the control unit 180 on the mobile communication network. The wireless Internet module 113 is a module for wireless Internet access and can be built in or enclosed in the radon detection system 100.

The wireless Internet module 113 is a module for wireless Internet access and can be built in or enclosed in the radon detection system 100.

WLAN (Wi-Fi), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink Packet Access) and the like can be used as the technology of the wireless Internet.

The short-range communication module 114 refers to a module for short-range communication. Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like can be used as the short range communication technology.

The position information module 115 is a module for obtaining the position of the radon detection system 100, and a representative example thereof is a Global Position System (GPS) module.

According to the present technology, the GPS module 115 calculates distance information and accurate time information from three or more satellites, and then applies a trigonometric method to the calculated information to calculate a three-dimensional current position according to latitude, longitude, Information can be accurately calculated.

At present, a method of calculating position and time information using three satellites and correcting an error of the calculated position and time information using another satellite is widely used. In addition, the GPS module 115 can calculate speed information by continuously calculating the current position in real time.

In order to measure the concentration of radon in the atmosphere, the radon detection sensor unit 120 may measure the number of radon using the peak value of the voltage generated by the radon, and calculate the concentration using the volume of time and place.

The radon detecting sensor unit 120 may be a semiconductor that receives light and outputs an electronic signal. Typical examples of the radon detecting sensor unit 120 include a CCD (Charge Coupled Device), a CMOS (complementary metal-oxide semiconductor), a silicon germanium, There are sensors incorporating silicon-on-sapphire, indium-potassium-arsenic, cadmium-mercury-telluride or gallium-arsenic substrates.

Particularly, the radon detection sensor unit 120 can detect the radiated alpha rays as the radon collapses. In general, since the alpha rays are heavy, the moving distance is only 2 to 3 cm, and thin materials such as tissue paper can not pass through. The radon concentration can be detected more accurately than the conventional technique of detecting and measuring the gamma ray because the alpha ray is heavy. The radon detecting sensor unit 120 should remove the sensor cover glass located in the light receiving unit of the general image sensor according to the characteristics of the alpha ray. This is because the alpha rays can not be detected because they can not pass through the sensor cover glass located at the light receiving portion of the image sensor.

The user input unit 130 generates input data for controlling the operation of the radon detection system 100.

The user input unit 130 may receive from the user a signal designating two or more contents among the displayed contents according to the present invention. A signal for designating two or more contents may be received via the touch input, or may be received via the hard key and soft key input.

The user input unit 130 may receive an input from the user for selecting the one or more contents. It may also receive input from a user to generate an icon associated with a function that the radon detection system 100 can perform.

The user input unit 130 may include a directional keypad, a keypad, a dome switch, a touchpad (static / static), a jog wheel, a jog switch, and the like.

The air purifier 140 selectively filters in / out of the indoor / outdoor air according to the indoor air quality to regulate the concentration of the main parameters for reducing the air quality by circulating the inhaled air to the indoor. As an example, there is a ventilator, an air conditioner that changes the temperature, a heater, and the like, and a dehumidifier for controlling the humidity and an air purifier for controlling the fine dust are also included.

The output unit 150 generates an output related to a visual, auditory or tactile sense. The output unit 150 may include a display unit 151, an audio output module 152, an alarm unit 153, and the like.

The display unit 151 displays information processed in the radon detection system 100.

For example, a UI (User Interface) or a GUI (Graphic User Interface) associated with radon detection of the radon detection system 100 is displayed.

The display unit 151 may be a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED) a flexible display, and a 3D display.

Some of these displays may be transparent or light transmissive so that they can be seen through. This can be referred to as a transparent display, and a typical example of the transparent display is TOLED (Transparent OLED) and the like. The rear structure of the display unit 151 may also be of a light transmission type.

The audio output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a recording mode, a voice recognition mode, a broadcast receiving mode, or the like.

The sound output module 152 also outputs an acoustic signal related to the function performed in the radon detection system 100. The audio output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying the occurrence of an event of the radon detection system 100.

The alarm unit 153 may output a signal for notifying the occurrence of an event in a form other than the video signal or the audio signal, for example, vibration. In this case, the display unit 151 and the audio output module 152 may be a type of the alarm unit 153. The display unit 151 and the audio output module 152 may be connected to the display unit 151 or the audio output module 152, .

The memory 160 may store a program for processing and controlling the controller 180, and may perform functions for temporary storage of input / output data. The memory 160 may also store the frequency of use of each of the data. In addition, the memory 160 may store data on vibrations and sounds of various patterns that are output upon touch input on the touch screen.

The memory 160 may store and manage radon concentration values measured at predetermined intervals.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory, etc.) ), A random access memory (RAM), a static random access memory (SRAM), a read-only memory (ROM), an electrically erasable programmable read-only memory (EEPROM), a programmable read- A magnetic disk, an optical disk, a memory, a magnetic disk, or an optical disk. The radon detection system 100 may operate in association with a web storage that performs the storage function of the memory 160 on the Internet.

The controller 180 typically controls the overall operation of the air cleaning system 100.

The control unit 180 may include a multimedia module for multimedia playback. The multimedia module may be implemented in the control unit 180 or separately from the control unit 180.

The control unit 180 may include a radon detection determination unit 181 and a detected radon calculation unit 182.

The radon detection determination unit 181 determines whether or not the radon is detected using the voltage output through the radon detection sensor unit 120. When the alpha rays generated in the radon are applied to the radon detection sensor unit 120, the radon detection sensor unit 120 outputs a voltage higher than the ground voltage. At this time, when the output voltage is higher than the predetermined low voltage, a comparator module is used to extract a voltage that is higher than the ground voltage and detect the radon.

The detected radon calculation unit 182 counts the number of radon detected to be detected through the radon detection determination unit 181. [ Also, the radon concentration can be detected using the area of the location where the radon detector is present and the time of the predetermined period. It is possible to measure the number of alpha rays applied to the radon detection sensor unit 120 without error by using the voltage extracted through the radon detection determination unit 181. [ The number of times of having a voltage that is higher than the base voltage is cumulatively counted for a predetermined period, and when the preset period has passed, it can be initialized or managed to be accumulated continuously.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power necessary for operation of the respective components.

FIG. 2 is an example of a block diagram showing a connection between a radon detection system and a server that can be applied to the present invention.

2, the radon detection system 100 may be connected to the server 200 via the Internet 300, and may detect the concentration of radon per predetermined period, the radon detection system 100, The radon detection system 100 can detect the radon concentration and transmit all the data used for the calculation to the server 200 via the Internet 300 and the data received from the server 300, The data generated by reprocessing and reprocessing can be transmitted to the radon detection system 100 again. At this time, the radon detector that receives the generated data can automatically perform a specific operation such as notifying the user through the received data.

According to the above-described configuration, the present invention can provide a user with a radon detection system 100 which is cheaper than the conventional radar detection system and has a much higher radon concentration detection capability in the air.

The radon detection method using the radon detection system 100 will be described with reference to the drawings.

3 is a flow diagram of a radon detection method that can be applied to the present invention.

Referring to FIG. 3, the method for detecting a radon using the radon detection system 100 starts from the step of installing the radon detection system 100 in a predetermined place (S110). At this time, the radon detection system 100 is preferably located in a room having a certain volume, and it is preferable to measure the indoor radon concentration. It is desirable that the indoor air be installed at the best circulation point in order to confirm the correct radon concentration. Also, it is preferable that the radon detection system 100 is located in the dark room for measuring the number of radons due to the intensity of light, and the dark room is configured such that the light is blocked but the air can be circulated.

After the radon detection system 100 is installed, the step of adjusting the installed radon detection system to the installed location is performed (S120). At this time, the installed radon detection system 100 adjusts the dark voltage at the installed position, adjusts the voltage when the light is released, adjusts the voltage level when detecting radon using the radon sample, And the length of one line can be further adjusted. Additional adjustments can be made depending on temperature and humidity.

After the adjustment of the radon detection system 100 is completed, the step of applying an alpha ray to the image sensor of the adjusted radon detection system 100 (S130) proceeds. That is, starting from step S130, the radon detection system 100 measures the number of radon in the room for a preset period in the dark room as a start of the step of actually measuring the radon concentration in the air. An alpha ray generated from the radon is applied to the image sensor.

After the alpha rays are applied to the image sensor, the step of electron generation (S140) to the image sensor proceeds. Since the image sensor receives a light signal and is electronically charged, electrons are generated in the image sensor. The image sensor used herein may be a conventional image sensor, most typically a CCD and a CMOS. However, when CCD and CMOS are used, the sensor cover glass used for receiving light should be removed. This is because of the nature of the alpha rays, the sensor cover glass can not be transmitted.

After electrons are generated in the image sensor, the generated electrons are converted into voltages (S150). The electrons generated in the image sensor are charged to the image sensor by a small electronic charge, and the charged image sensor converts it into a voltage signal when the signal is transmitted.

If the converted voltage is higher than the predetermined low voltage, the converted voltage is extracted and amplified (S160).

The step of counting the number of amplified voltages (S170) is such that if the base voltage is 2.4 V, the converted voltage amplification value is 5 V, so that the difference is clearly evident and the count due to the error can be prevented from being erroneous. The number of times having the voltage value amplified by 5V is accumulated and counted for a predetermined period, and when the preset period has passed, it can be initialized or managed to be accumulated continuously.

The step of calculating the radon concentration using the counted number (S180) calculates the indoor radon concentration using the counted number of times, the indoor area, and the predetermined period. Calibration radon concentration can be calculated by adjustment at installation. The calculated radon concentration can also be output by the display unit.

Radon detection system using image sensor module with digital output

In the meantime, the present invention proposes a specific embodiment for detecting radon more accurately and quickly by using an image sensor module having a digital output.

The radon detection system 100 using the image sensor module having the digital output proposed here uses a CMOS image sensor having a digital output as the radon detection sensor unit 120.

4 is a block diagram of a radon detection system using an image sensor module having a digital output proposed by the present invention.

Referring to FIG. 4, the image sensor module having a digital output according to the present invention includes a radon detection sensor unit 120, a controller 180, a display unit 151, (200) and the like.

1 and 2, a CMOS image sensor is used as the radon detection sensor unit 120 in the present invention, and the control unit 180 controls the radar detection unit 181 Includes an image data storage unit 183, an image pixel data value analyzing unit 184, a pixel extracting unit 185, and a binary converting unit 186.

Hereinafter, specific configurations and effects of the present invention will be described with reference to Figs. 5 to 9. Fig.

FIG. 5 is a block diagram of a radon detection sensor unit and a radon detection determination unit of the radon detection system using the image sensor module having a digital output according to the present invention, and FIG. 6 is a block diagram of an image sensor And a radon detecting sensor unit used in the radon detecting system using the module.

7 is a block diagram of a control unit used in a radon detection system using an image sensor module having a digital output according to the present invention. FIG. 8 is a block diagram of an image sensor module To count the data corresponding to the radon.

9 is another diagram for explaining a process of counting data corresponding to radon using the image sensor module included in the radon detection determination unit according to the present invention.

Referring to FIG. 5, an example of a block diagram of a radon detection sensor unit and a radon detection determination unit according to the present invention is shown.

The radon detection sensor unit 120 must remove the sensor cover glass located in the light receiving unit of the general image sensor according to the characteristics of the alpha ray. This is because the alpha rays can not be detected because they can not pass through the sensor cover glass located at the light receiving portion of the image sensor.

That is, the radar detection sensor unit 120 is installed in a case where the sensor cover glass is removed so that the alpha-ray can be applied to the CMOS camera, and then only the air passes through without the light passing therethrough.

An electrostatic concentrator 121 may be included in the vicinity of the radon detecting sensor unit 120.

The electrostatic thickener 121 generates a high voltage to form an electric field to provide the function of inducing alpha particles around the CMOS camera sensor.

That is, the electrostatic thickener 121 is a device for improving the radon detection performance and the effect of blocking the light due to the characteristics of the sensor responsive to the light. The high voltage (0 V to 10,000 V) is applied to the radon detection sensor unit 120 .

Further, the radon detecting sensor unit 120 is constituted by a CMOS image sensor.

A CMOS image sensor is an imaging device using a CMOS (complementary metal oxide semiconductor), and uses a photodiode in the same way as a CCD image sensor, but differs in a manufacturing process and a signal reading method.

The principle of the CMOS image sensor was devised in the late 1960s, but practical use has been in the 1990s since the microfabrication technology was advanced. As the image sensor technology has become higher in resolution since the late 2000s, BSI (Back Side Illumination) process technology and 3D Stacking Sensor manufacturing process technology are emerging.

Unlike 3D CMOS image sensor fabrication process by Wafer Stacking, which processes the optical integration part and driving circuit part of Pixel simultaneously on one wafer, the optical integration part and the driving circuit part are processed on different wafers , And bonding the two wafers to each other after a predetermined process, followed by a subsequent constant process.

That is, only a part of the driving circuit which processes the optical integrated part efficiently in one wafer, receives the signal of the optical integrated part in the other wafer and processes it, and outputs the output signal is also efficiently processed.

At this time, a bonding pad for bonding two wafers is formed on each wafer, and the bonding pad is overlapped with the upper and lower wafers.

Because it can be mass-produced by application of CMOS logic LSI manufacturing processor, it has advantages of low manufacturing cost, small size and low power consumption compared to CCD image sensor with high voltage analog circuit.

The logic circuit was fabricated by the same process, and the image processing circuit was turned on-chip and applied to the image recognition device and the artificial vision device. This is sometimes referred to as an artificial retina chip.

CMOS image sensors are more cost effective than CCD image sensors because they can be manufactured using general purpose semiconductor manufacturing equipment.

The CMOS image sensor 120 according to the present invention provides a function as a device for sensing light energy and converting it into electrical energy proportional thereto.

For example, the CMOS image sensor 120 according to the present invention collects the visible ray wavelength band (400 to 650 nm) of light energy in a photodiode, and the surface of the silicon is covalently bound to the electric / It uses the principle that the hole pair is created.

In this case, the CMOS image sensor 120 outputs the generated electric / hole pair electric potential as 0 to 255 code data through the A / D converter.

The CMOS sensor 120 according to the present invention is an image sensor having a digital output, and can be equipped with an ISP (image signal process) board and a device including a communication function capable of transmitting image data to a PC (webcam, USB camera, Wi- Fi camera, IP camera, etc.).

In addition, in order to detect radon, the sensor cover glass attached to the sensor may be removed so that the alpha ray may be applied.

In addition, the image data output when the alpha ray is applied may be different depending on the camera sensor or the ISP.

6, a CMOS image sensor 120 according to the present invention includes a microlens 123, a color filter array unit 124, a pixel array unit 125, an amplification unit 126, an ADC 127, A signal processing unit 122, and a sensor control unit 128.

The CMOS image sensor 120 is controlled by the sensor controller 128 under the control of the sensor controller 128. The CMOS image sensor 120 transmits the light through the microlens 123, the color filter array unit 124 and the pixel array unit 125, Can be condensed on a silicon photodiode, and the silicon surface can be covalently broken by light energy to generate an electric / hole pair.

Also, under the overall control of the sensor control unit 128, the potential of the electric / hole pair generated is output as code data of 0 to 255 through the ADC 127.

Also, the output of the code data of 0 to 255 can be increased through the amplifier 126.

5, an image signal processing unit 122 for processing an image signal may be included in the vicinity of the radon detection sensor unit 120.

The image signal processing unit 122 provides a function of supporting the process of transmitting image data composed of code data of 0 to 255 of the CMOS sensor 120 to the control unit 180.

However, the image signal processing unit 122 may be implemented in the CMOS sensor 120, as shown in FIG. 6, in addition to being manufactured separately from the CMOS sensor 120.

5 and 6, the CMOS sensor 120 outputs a digital output, and the CMOS sensor 120 outputs the code data of 0 to 225 to the control unit 180 And supplies the composed video data.

Referring to FIG. 5, a control unit 180 receives image data composed of code data of 0 to 225 from the CMOS sensor 120.

The control unit 180 according to the present embodiment is a device that can perform image signal processing software (MATLAB, VISUAL C ++, etc.) capable of storing and analyzing image data transmitted through a digital signal CMOS sensor, Lt; / RTI >

In addition, the control unit 180 according to the present embodiment may include an OS (windows, mac, linux) for installing and driving image signal process software.

The control unit 180 of FIG. 5 includes a radon detection determination unit 181 and a detected radon calculation unit 182, as described with reference to FIG. 1 and FIG.

1 and 2, the detected radon calculation unit 182 counts the number of radon detected to be detected through the radon detection determination unit 181, and calculates the width of the location where the radon detector 100 exists The radon concentration can be detected using a predetermined period of time.

However, the radon detection determination unit 181 according to the present embodiment stores image data composed of code data of 0 to 225 received from the CMOS sensor 120 on a frame unit basis, analyzes the frame image pixel data value, Only the pixels corresponding to the data are extracted and converted into a binary image.

7, the radon detection determination unit 181 according to the present invention includes an image data storage unit 183, an image pixel data value analysis unit 184, a pixel extraction unit 185, and a binary conversion unit 186 .

That is, the image data storage unit 183 of the radon detection determination unit 181 stores image data composed of code data of 0 to 255 of the CMOS sensor on a frame basis by a radon detector using a CMOS sensor having a digital output.

The image pixel data value analyzer 184 analyzes the image pixel data values of each frame through the image processing tool software stored in the image data storage 183.

In addition, the pixel extracting unit 185 extracts only pixels corresponding to the radon data based on the analyzed result.

In addition, the binary converter 186 converts the pixel corresponding to the radon data into a binary image, and the detected radon calculator 182 counts the number of radon detections using the converted result, .

Referring to FIG. 8, the radon detector 100 using the CMOS sensor 120 having a digital output through the process of FIG. 8A transmits image data composed of code data of 0 to 255 of the CMOS sensor 120, (180) is received.

8 (b), the control unit 180 stores the image data on a frame-by-frame basis, and analyzes the stored image image pixel data values of each frame through the image processing tool software.

8 (c), the controller 180 extracts only the pixels corresponding to the radon data, converts the extracted pixels into binary images, counts the number of radon detections, and converts the counts to the density.

Referring to FIG. 9, the sensor cover glass is removed from the CMOS camera 120 so that an alpha ray can be applied to the CMOS camera 120, and the sensor cover glass is installed in a case where light can not pass therethrough and only air passes through the sensor cover glass.

In addition, the camera 120 is connected to a control unit 180 capable of performing an image processing operation, and receives image data transmitted to the control unit 180 to operate the program to perform image processing.

9 (a), 9 (b), and 9 (c), the controller 180 controls the image data of each frame from the image transmitted to the controller 180, Gray -> Convert to binary image.

9 (b) and 9 (c), the pixels of the gray image are converted into 0 or 255 values around the reference value (radon data, 200 in FIG. 9).

In each frame thus converted, the detected radon calculation unit 182 counts the number of data having a value of 255 and stores the total count number in units of one hour.

Using the number of counts thus stored, the detected radon calculation unit 182 can calculate the radon concentration.

Radon detection method using image sensor module with digital output

10 is a flowchart of a radon detection method using a radon detection system using an image sensor module having a digital output according to the present invention.

Referring to FIG. 10, the radon detection system 100 starts at a predetermined place (S110).

At this time, it is preferable that the radon detection system 100 is located in a room having a certain volume, and the indoor radon concentration is measured.

It is desirable that the indoor air be installed at the best circulation point in order to confirm the correct radon concentration.

Also, it is preferable that the radon detection system 100 is located in the dark room for measuring the number of radons due to the intensity of light, and the dark room is configured such that the light is blocked but the air can be circulated.

Next, after the radon detection system 100 is installed, a step of adjusting the installed radon detection system to the installed location is performed (S120).

At this time, the installed radon detection system 100 adjusts the dark voltage at the installed position, adjusts the voltage when the light is released, adjusts the voltage level when detecting radon using the radon sample, And the length of one line can be further adjusted. Additional adjustments can be made depending on temperature and humidity.

After the adjustment of the radon detection system 100 is completed, the step of applying an alpha ray to the image sensor of the adjusted radon detection system 100 (S130) proceeds.

That is, starting from step S130, the radon detection system 100 measures the number of radon in the room for a predetermined period in the dark room as a start of the step of actually measuring the radon concentration in the air.

An alpha ray generated from the radon is applied to the image sensor.

After the alpha rays are applied to the image sensor, the step of electron generation (S140) to the image sensor proceeds. Since the image sensor receives a light signal and is electronically charged, electrons are generated in the image sensor. In the present invention, the above-described CMOS image sensor is used as the image sensor 120.

Also, in this embodiment, an image sensor from which a sensor cover glass used for receiving light is removed should be used. This is because of the nature of the alpha rays, the sensor cover glass can not be transmitted.

After electrons are generated in the image sensor, the generated electrons are converted into voltages (S150). The electrons generated in the image sensor are charged to the image sensor by a small electronic charge, and the charged image sensor converts it into a voltage signal when the signal is transmitted.

Thereafter, step S210 of converting the converted voltage to image code data is performed.

That is, as described above, the process of the control unit 180 receiving the image data composed of the code data of 0 to 255 of the CMOS sensor 120 with the radon detector 100 using the CMOS sensor 120 having the digital output It proceeds.

When the image code data converted through the image processing is equal to or larger than a preset value, the step S220 of converting into binary data proceeds.

That is, the control unit 180 stores the image data on a frame-by-frame basis, and analyzes the image pixel data value of each frame through the image processing tool software.

In step S220, the controller 180 extracts only the pixels corresponding to the radon data and converts the pixels into a binary image.

In addition, the step S230 of counting data corresponding to radon among the data converted into the binary data proceeds.

The detected radon calculation unit 182 counts the number of detected radon and converts it to a concentration in step S180.

In the calculating the radon concentration using the counted number of times (S180), the indoor radon concentration is calculated using the counted number of times, the indoor area, and the predetermined period. Calibration radon concentration can be calculated by adjustment at installation. The calculated radon concentration can also be output by the display unit 151. [

Digital signal CMOS sensor radon detector using logic circuit

4 to 10, the detected radon calculation unit 182 counts the number of radon detected to be detected through the radon detection determination unit 181, and outputs the count value to the radar detector 100 ) And the time of the predetermined period can be used to detect the concentration of the radon.

4 to 10, the radon detection determination unit 181 stores image data composed of code data of 0 to 225 received from the CMOS sensor 120 in units of frames , Analyzes the frame image pixel data value, extracts only the pixels corresponding to the radon data, and converts it into a binary image.

At this time, if the performance of the controller 180 is high, the radon detection determining unit 181 stores the image data composed of code data of 0 to 225 received from the CMOS sensor 120 on a frame unit basis, Extracts only the pixels corresponding to the radon data, and converts it into a binary image. However, if it does not support high performance, it causes a problem that the control unit 180 is given an excessively large load.

That is, in order to analyze the digital data output from the radon detection sensor unit 120, a controller (PC) 180 having sufficient performance is required. In another embodiment of the present invention, a simple logic circuit And a method for manufacturing a radon detector using the low performance MCU 180 is proposed.

A radon detection system using a logic circuit and an image sensor module having a digital output proposed by the present invention will be described in detail with reference to the drawings.

11 is a block diagram of a radon detection sensor unit, a control unit, and a logic circuit unit of a radon detection system using an image sensor module having a digital output according to the present invention and a logic circuit.

12 shows an example of a logic circuit applied to a radon detection system using an image sensor module having a digital output and a logic circuit according to the present invention.

1 and 2, the radon detection sensor unit 120, the control unit 180, the display unit 151, the server 200, and the image sensor module having the digital output and the logic circuit, And the like.

However, unlike the configurations of FIGS. 1 and 2, the CMOS image sensor is used as the radon detection sensor unit 120, and the radon detection sensor unit 120 further uses the radon data And a logic circuit unit 129 for detecting the input signal.

Here, the logic circuit unit 129 may be configured as an AND / OR gate IC to detect radon data from data output in parallel from the radon detecting sensor unit 120. [

In the embodiment of the present invention using the logic circuit unit 129, since the radon detection is determined in advance in the radon detection sensor unit 120 through the logic circuit unit 129, It may include only the detected radon calculation section 182 without including the detected radon calculation section 181.

Referring to FIG. 11, first, the radon detecting sensor unit 120 should remove a sensor cover glass located in a light receiving unit of a general image sensor according to the characteristics of an alpha ray. This is because the alpha rays can not be detected because they can not pass through the sensor cover glass located at the light receiving portion of the image sensor.

That is, the radar detection sensor unit 120 is installed in a case where the sensor cover glass is removed so that the alpha-ray can be applied to the CMOS camera, and then only the air passes through without the light passing therethrough.

An electrostatic concentrator 121 may be included in the vicinity of the radon detecting sensor unit 120.

The electrostatic thickener 121 generates a high voltage to form an electric field to provide the function of inducing alpha particles around the CMOS camera sensor.

That is, the electrostatic thickener 121 is a device for improving the radon detection performance and the effect of blocking the light due to the characteristics of the sensor responsive to the light. The high voltage (0 V to 10,000 V) is applied to the radon detection sensor unit 120 .

Further, the radon detecting sensor unit 120 is constituted by a CMOS image sensor. The CMOS image sensor 120 according to the present invention provides a function as a device for sensing light energy and converting it into electrical energy proportional thereto.

For example, the CMOS image sensor 120 according to the present invention collects the visible ray wavelength band (400 to 650 nm) of light energy in a photodiode, and the surface of the silicon is covalently bound to the electric / It uses the principle that the hole pair is created.

In this case, the CMOS image sensor 120 outputs the generated electric / hole pair electric potential as 0 to 255 code data through the A / D converter.

The CMOS sensor 120 according to the present invention is an image sensor having a digital output, and can be equipped with an ISP (image signal process) board and a device including a communication function capable of transmitting image data to a PC (webcam, USB camera, Wi- Fi camera, IP camera, etc.).

In addition, in order to detect radon, the sensor cover glass attached to the sensor may be removed so that the alpha ray may be applied.

In addition, the image data output when the alpha ray is applied may be different depending on the camera sensor or the ISP.

In addition, in the embodiment of the present invention, the logic circuit unit 129 may further be included.

The logic circuit unit 129 of FIG. 11 may be configured as an AND / OR gate IC to detect radon data from data output in parallel from the radon detection sensor unit 120. [

In the embodiment of the present invention using the logic circuit unit 129, since the radon detection can be performed in advance in the radon detection sensor unit 120 through the logic circuit unit 129, It may include only the detected radon calculation section 182 without including the determination section 181. [

A specific configuration of the logic circuit unit 129 that can be applied to the present invention will be described with reference to FIG.

12, first, the CMOS image sensor 120 is controlled by the sensor controller 128 under the control of the micro-lens 123, the color filter array unit 124, and the pixel array unit 125, The visible ray (400 ~ 650nm) is condensed on a silicon photodiode, and the silicon surface is covalently broken by light energy to generate an electric / hole pair.

Also, under the overall control of the sensor control unit 128, the potential of the electric / hole pair generated is output as code data of 0 to 255 through the ADC 127.

Also, the output of the code data of 0 to 255 can be increased through the amplifier 126.

In the vicinity of the radon detecting sensor unit 120, there is a logic circuit unit 129 composed of an AND / OR gate IC for detecting radon data from data radar output from the radon detecting sensor unit 120 in a parallel manner.

The logic circuit unit 129 can output code data of 0 to 255 which is 8-bit pixel data through eight data pins of the CMOS sensor 120. [

When the CMOS sensor 120 is in the dark state, it will be outputted as data close to zero.

The circuit is configured to output the radon detection signal through one wire when the radon is detected, by filtering only the radon detection data through the logic circuit using the AND / OR gate IC on the data pin.

For example, in FIG. 12, when the pixel data value is 200 or more when the radon is detected, the logic circuit outputs the signal from low (0) to high (1) only when the value of 200 or more is output. Can be output.

The MCU 180 counts the high signal, which is the radon detection signal, and calculates the radon concentration based on the count.

Therefore, in the embodiment of the present invention using the logic circuit unit 129, the radon detection unit 120 preliminarily determines the radon detection through the logic circuit unit 129, It is possible to include only the detected radon calculation section 182 without including the section 181.

Referring to FIG. 12, D7 and D6 are connected to an AND gate in order to combine more than 200 pixel data values at eight data pins of the radon detecting sensor unit 120. In FIG.

If D7 and D6 both show a digital value of 1, the pixel data value may be 192 (128 + 64).

Also, at least a part of VCLK, HCLK, and PCLK at the top of D7 is available as a clock signal for driving the logic circuit unit 129. [

The pixel data value becomes 192 (128 + 64) when D7 and D6 both have a digital value of 1, and only one of D5, D4 and D3 can be set to be 200 or more.

Therefore, D5, D4, and D3 are connected to the OR gate.

If D5 is 1, the total pixel data value is 224 (192 + 32). If D4 is 1, the total pixel data value is 208 (192 + 16) (192 + 8), so that even if there is only one value, the reference pixel value exceeds 200, which is a reference pixel value.

Therefore, this information is combined with an AND gate to output a high signal (for example, 1) as a radon detection signal.

Then, the detected radon calculating section 182 counts the high signal which is the radon detecting signal, and converts it into the concentration.

Digital signal CMOS sensor radon method using logic circuit

13 is a flowchart of a radon detection method using an image sensor module having a digital output and a logic circuit according to the present invention.

10 is a flowchart of a radon detection method using a radon detection system using an image sensor module having a digital output according to the present invention.

Referring to FIG. 10, the radon detection system 100 starts at a predetermined place (S110).

At this time, it is preferable that the radon detection system 100 is located in a room having a certain volume, and the indoor radon concentration is measured.

It is desirable that the indoor air be installed at the best circulation point in order to confirm the correct radon concentration.

Also, it is preferable that the radon detection system 100 is located in the dark room for measuring the number of radons due to the intensity of light, and the dark room is configured such that the light is blocked but the air can be circulated.

Next, after the radon detection system 100 is installed, a step of adjusting the installed radon detection system to the installed location is performed (S120).

At this time, the installed radon detection system 100 adjusts the dark voltage at the installed position, adjusts the voltage when the light is released, adjusts the voltage level when detecting radon using the radon sample, And the length of one line can be further adjusted. Additional adjustments can be made depending on temperature and humidity.

After the adjustment of the radon detection system 100 is completed, the step of applying an alpha ray to the image sensor of the adjusted radon detection system 100 (S130) proceeds.

That is, starting from step S130, the radon detection system 100 measures the number of radon in the room for a predetermined period in the dark room as a start of the step of actually measuring the radon concentration in the air.

An alpha ray generated from the radon is applied to the image sensor.

After the alpha rays are applied to the image sensor, the step of electron generation (S140) to the image sensor proceeds. Since the image sensor receives a light signal and is electronically charged, electrons are generated in the image sensor. In the present invention, the above-described CMOS image sensor is used as the image sensor 120.

Also, in this embodiment, an image sensor from which a sensor cover glass used for receiving light is removed should be used. This is because of the nature of the alpha rays, the sensor cover glass can not be transmitted.

After electrons are generated in the image sensor, the generated electrons are converted into voltages (S150). The electrons generated in the image sensor are charged to the image sensor by a small electronic charge, and the charged image sensor converts it into a voltage signal when the signal is transmitted.

Thereafter, step S210 of converting the converted voltage to image code data is performed.

That is, as described above, the radon detector 100 using the CMOS sensor 120 having a digital output outputs code data of 0 to 255, which is 8-bit pixel data, through the eight data pins of the CMOS sensor 120, (129).

Thereafter, in a case where the predetermined calculation condition is satisfied in the logic circuit unit 129, a step S310 of outputting a signal indicating that radon exists is proceeded.

That is, when the CMOS sensor 120 is in the dark state, the data is outputted as data close to 0. The method of filtering only the radon detection data through the logic circuit using the AND / OR gate IC on the data pin, And the circuit is configured to output the radon detection signal through the two wires.

For example, as described with reference to FIG. 12, when the data value of the pixel data value is 200 or more at the time of radon detection, the logic circuit outputs the radon detection signal low (0) to high (1 To output a signal.

Thereafter, the detection radon calculation unit 182 counts the data corresponding to the radon detection (S320).

The detected radon calculation unit 182 counts the number of detected radon and converts it to a concentration in step S180.

In the calculating the radon concentration using the counted number of times (S180), the indoor radon concentration is calculated using the counted number of times, the indoor area, and the predetermined period. Calibration radon concentration can be calculated by adjustment at installation. The calculated radon concentration can also be output by the display unit 151. [

Accordingly, in order to analyze the digital data output from the radon detection sensor unit 120, a problem of a controller (PC) 180 having sufficient performance is solved. In another embodiment of the present invention, And to provide a device and a method for fabricating a radon detector using the low performance MCU 180.

When the configuration and method of the present embodiment described above are applied, the present invention can accurately determine the amount of atmospheric radon through alpha ray detection, and can protect human health through radon detection.

Radon is a first-level carcinogen, which is very lethal to modern people. The present invention can detect the concentration of radon in a closed space such as a building or a subway, thereby enabling the ventilation system to operate and contribute to public health.

Further, the present invention can measure the radon concentration more precisely than the conventional radon measurement using the gamma ray, and can reduce the calculation error according to the measured value using the high performance processor.

In addition, the present invention can measure a more accurate radon concentration than a conventional radon measurement using a gamma ray, and can achieve a reliable measurement value using a low-performance and low-cost processor.

Further, the present invention can mount one or more sensors according to the electrical stability of the measuring instrument and the addition of the logic circuit, thereby assuring a better performance than the existing radon measuring apparatus.

Current radon concentrations are also of interest to national, business and public, and must be monitored and observed for health. However, since a reliable apparatus for measuring the radon is not currently available, it is considered that the spread of the reliable radon measuring apparatus according to the present invention is highly marketable.

In addition, through the spread of the radon measuring terminal according to the present invention, a server system for collecting, processing and managing the radon concentration measured at the terminal, a communication network for transmitting the measured radon concentration to the server, and a closed- It can be used actively in various fields such as being utilized.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The foregoing detailed description of the preferred embodiments of the invention disclosed herein is provided to enable any person skilled in the art to make and use the present invention.

While the present invention has been particularly shown and described with reference to preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

For example, those skilled in the art can utilize each of the configurations described in the above-described embodiments in a manner of mutually combining them.

Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative.

The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

The present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

In addition, claims that do not have an explicit citation in the claims may be combined to form an embodiment or be included in a new claim by amendment after the filing.

Claims (9)

1. A radon detection system for calculating indoor radon concentration,
A chamber in which the incoming light is blocked and the air is circulated;
The plasma display apparatus according to claim 1, further comprising: a voltage generator for generating a voltage according to an application of an alpha ray generated in the radon in the chamber, And binarizes the image data included in each frame of the signal and outputs the first information when the binarized image data has pixels having a predetermined reference value or more and if the binarized image data has pixels below the reference value, An image sensor for outputting an image; And
And a controller for counting the number of the first information and calculating the indoor radon concentration using the counted first information,
The binarized image data is represented by N bits,
Wherein the image sensor comprises:
A logic circuit including at least one of an AND gate (GATE) and an OR gate is applied to at least one of the N bits to determine whether the binarized image data has pixels having a predetermined reference value or more,
Wherein the number of the first information,
And the number of times of application of the alpha ray according to the voltage change is determined.
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delete
The method according to claim 1,
Wherein the image sensor comprises a complementary metal-oxide semiconductor (CMOS).
The method according to claim 1,
Wherein the image sensor comprises:
Characterized in that the sensor cover glass located in the image sensor is removed so that the alpha rays can be applied.
The method according to claim 1,
And a wireless communication unit for transmitting the calculated indoor radon concentration to a server via the Internet,
The radon detection system is a plurality,
Wherein each of the plurality of radon detection systems transmits a radon concentration of the room calculated by the server,
Wherein the alarm is received from the server if the radon concentration statistically measured at the server exceeds a reference value.
A radon detecting method for calculating a radon concentration in a room,
A first step in which the chamber blocks light coming in from the surroundings, and circulates the air;
A second step in which an image sensor positioned in the chamber generates electrons according to application of an alpha ray generated in the radon in air;
A third step of the image sensor outputting a change of the voltage as a digital image signal when a voltage output through the generated electrons is changed;
A fourth step of the image sensor binarizing the image data included in each frame of the digital image signal;
A fifth step of outputting first information when the image sensor has pixels having a predetermined reference value or more and outputting second information if the binarized image data has pixels less than the reference value;
A sixth step of the control unit counting the number of the first information; And
And a seventh step of calculating the radon concentration of the room by using the number of the first information counted by the controller,
The binarized image data is represented by N bits,
In the fifth step,
Wherein the image sensor determines whether or not the binarized image data has pixels having a predetermined reference value or more by applying a logic circuit including at least one of an AND gate (GATE) and an OR gate to at least one of the N bits,
Wherein the number of the first information,
And the number of application of the alpha ray according to the voltage change.
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