KR20210075747A - Hazardous gas alerting method and system - Google Patents

Abstract

The present invention relates to a method and system for notifying hazardous gas to a user. The method for notifying hazardous gas can provide notification of hazardous gas by using a mobile terminal having a camera and a display. The method for notifying hazardous gas comprises the following steps of: examining gas identification codes from an image obtained by photographing of the camera; designating a target gas based on the gas identification code; examining one or more color code corresponding to the target gas from the image; generating information on notification of the target gas, based on the color code, and outputting the notification information on the display. The method and system for notifying gas uses green energy such as solar energy and provides an alarm/notification of concentrations of a variety of gases to other terminals by using an IoT.

Description

HAZARDOUS GAS ALERTING METHOD AND SYSTEM

The present invention relates to a hazardous gas notification method and system capable of notifying the presence or absence of hazardous gas in a working environment or living environment.

Recently, accidents in which workers are poisoned by harmful gases during construction of specific underground spaces such as inside manholes or pumping stations are frequently occurring.

This may occur during the operation if there was no safety preparation process according to the detection of hazardous gas in the internal space in advance when the worker is put into the construction site, and there is no hazardous gas at first.

In order to solve this problem, a technique for preparing for a safety accident by detecting a hazardous gas for a manhole or an underground space has been introduced in the prior art.

As an example, referring to Korean Patent Publication No. 10-1165618, in the manhole internal monitoring system, the first power supply unit for obtaining power through a power cable or battery passing through the inside of the manhole; A water level measurement unit for measuring the water level inside the manhole, a gas measurement unit for measuring the gas concentration inside the manhole, an arc detection unit for detecting an arc due to insulation breakdown of a power cable passing through the manhole, and from the first power source A first control unit that receives power, collects the signals of the water level measurement unit, the gas measurement unit, and the arc detection unit, generates and outputs the collected data, and a memory unit for storing the generated collected data is built-in; a monitoring device that transmits the collected data and includes a first communication unit that communicates with the outside of the manhole and is installed inside the manhole; A second power supply unit that obtains power through an external power source or battery, a second communication unit that receives the collected data transmitted through the first communication unit and communicates with the first communication unit, and receives power from the second power supply unit and receives the a second control unit for arranging the collected data received through the second communication unit, and a display unit for outputting and showing the sorted collected data through the second control unit, and is configured to be portable; It can be seen that the gas measurement unit is a manhole internal monitoring system, characterized in that it is configured in the form of a buoy floating on water, and the height is adjusted by the water level inside the manhole.

According to the prior art, the configuration is complicated and once installed, there is a disadvantage that it is difficult to move. In addition, the complex structure may require high cost.

In addition, more than 90% of female lung cancer patients are non-smokers due to carbon monoxide and carbon dioxide generated during cooking, and many people die every year due to traffic accidents caused by drowsy driving due to carbon dioxide generated from air conditioners or heaters. As such, although a lot of damage is caused by hazardous gas in daily life or industrial sites, a hazardous gas notification device that can be used anywhere at a low cost has not been developed.

SUMMARY OF THE INVENTION The present invention aims to solve the above and other problems.

It is an object of the present invention to provide a hazardous gas notification method capable of monitoring hazardous gas and providing a notification using IoT technology.

According to the present invention, a mobile terminal and a gas notification method for using the mobile terminal are provided.

The hazardous gas notification method may provide a hazardous gas notification using a mobile terminal having a camera and a display. Specifically, the hazard gas notification method includes: searching for a gas identification code from the image taken by the camera; specifying a target gas based on the gas identification code; searching for one or more color codes corresponding to the target gas from the image; generating notification information of the target gas based on the color code; and outputting the notification information to the display.

According to an embodiment, the searching for the color code may include: searching for a partial area including the gas identification code among the entire area of the image; determining a color code extraction region from among the entire region of the image based on the size and position of the partial region; and searching for the color code in the color code extraction area.

According to an embodiment, the searching for the color code in the color code extraction area includes searching for at least one area having a color corresponding to the target gas in the color code extraction area, and the color corresponds to the target gas. a step characterized in that it varies according to; and calculating an average color of the found at least one region and determining the color code as the color code.

According to an embodiment, the color code includes a first color code for performing color conversion according to a first gas and a second color code for performing color conversion according to a second gas, corresponding to the first color code The first color code extraction region and the second color code extraction region corresponding to the second color code are determined differently depending on the size and location of the partial region, and the generating of the notification information includes: generating first notification information corresponding to the first color code based on the average color of the code extraction area; and generating second notification information corresponding to the second color code based on the average color of the second color code extraction region.

According to one embodiment, the hazard gas notification method comprises: outputting the image to the display; and displaying a graphic object guiding the color code extraction area on the image.

According to an embodiment, the number of the color codes searched for from the image may vary according to the target gas.

The effects of the hazardous gas notification method and system according to the present invention will be described as follows.

A user may be provided with a gas sensor manufactured in the form of a business card or card, and by photographing the gas sensor, gas notification information for a place where the user is located may be provided. According to the present invention, various gas sensors can be mass-produced for each use, and there is an advantage in that notification information suitable for the use is provided by the gas identification code. Since the gas sensor is manufactured at a low cost while being carried by a user, it is possible to quickly and easily obtain gas notification information for many people.

1 is a block diagram illustrating a mobile terminal related to the present invention;
2 is a block diagram for explaining a hazardous gas notification system capable of notifying a user of a hazardous gas according to the present invention;
Figure 3 is a flowchart for explaining a hazardous gas notification method that can notify the hazardous gas using the mobile terminal of Figure 1
4 is an exemplary diagram for explaining the operation of the mobile terminal according to the method of FIG.
5A and 5B are exemplary views for explaining an operation of a mobile terminal providing a visual guide line for detecting a color code;
6A to 6C are views for explaining a gas sensor according to an embodiment of the present invention;

Hereinafter, the embodiments disclosed in the present specification will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and overlapping descriptions thereof will be omitted. The suffixes "module" and "part" for the components used in the following description are given or mixed in consideration of only the ease of writing the specification, and do not have a meaning or role distinct from each other by themselves. In addition, in describing the embodiments disclosed in the present specification, if it is determined that detailed descriptions of related known technologies may obscure the gist of the embodiments disclosed in the present specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in the present specification, and the technical spirit disclosed herein is not limited by the accompanying drawings, and all changes included in the spirit and scope of the present invention , should be understood to include equivalents or substitutes.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is mentioned that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The singular expression includes the plural expression unless the context clearly dictates otherwise.

In the present application, terms such as "comprises" or "have" are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

The mobile terminal described in this specification includes a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), a navigation system, and a slate PC. , tablet PCs, ultrabooks, wearable devices, for example, watch-type terminals (smartwatch), glass-type terminals (smart glass), HMD (head mounted display), etc. may be included. have.

However, it will be readily apparent to those skilled in the art that the configuration according to the embodiment described in this specification may be applied to a fixed terminal such as a digital TV, a desktop computer, and a digital signage, except when applicable only to a mobile terminal. will be.

1 is a block diagram illustrating a mobile terminal related to the present invention.

The mobile terminal 100 may include a wireless communication unit 110 , an input unit 120 , an output unit 150 , a memory 170 , a control unit 180 , and a power supply unit 190 .

Since the components shown in FIG. 1 are not essential for implementing the mobile terminal, the mobile terminal described in this specification may have more or fewer components than those listed above.

More specifically, the wireless communication unit 110 among the components is between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or between the mobile terminal 100 and the external server. It may include one or more modules that enable wireless communication between them. In addition, the wireless communication unit 110 may include one or more modules for connecting the mobile terminal 100 to one or more networks.

The short-range communication module 111 is for short-range communication, and includes Bluetooth™, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, NFC. At least one of (Near Field Communication), Wireless-Fidelity (Wi-Fi), Wi-Fi Direct, and Wireless Universal Serial Bus (USB) technologies may be used to support short-range communication. The short-distance communication module 111 is, between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or the mobile terminal 100 through wireless area networks (Wireless Area Networks). ) and another mobile terminal (100, or an external server) can support wireless communication between the network located. The local area network may be a local area network (Wireless Personal Area Networks).

The input unit 120 includes a camera 121 or an image input unit for inputting an image signal, a microphone or an audio input unit for inputting an audio signal, and a user input unit (eg, a touch key) for receiving information from a user. , a push key (mechanical key, etc.). The voice data or image data collected by the input unit 120 may be analyzed and processed as a user's control command.

The input unit 120 is for inputting image information (or signal), audio information (or signal), data, or information input from a user. For input of image information, the mobile terminal 100 includes one or more A camera 121 may be provided. The camera 121 processes an image frame such as a still image or a moving image obtained by an image sensor in a video call mode or a photographing mode. The processed image frame may be displayed on the display unit 151 or stored in the memory 170 .

The output unit 150 is for generating an output related to visual, auditory or tactile sense, and may include at least one of a display unit 151 , a sound output unit, a haptic module, and an optical output unit. The display unit 151 may implement a touch screen by forming a layer structure with the touch sensor or being formed integrally with the touch sensor. Such a touch screen may function as a user input unit providing an input interface between the mobile terminal 100 and the user, and may provide an output interface between the mobile terminal 100 and the user.

The display unit 151 displays (outputs) information processed by the mobile terminal 100 . For example, the display unit 151 may display execution screen information of an application program driven in the mobile terminal 100 or UI (User Interface) and GUI (Graphic User Interface) information according to the execution screen information. .

The display unit 151 may implement a touch screen by forming a layer structure with the touch sensor or being formed integrally with the touch sensor. Such a touch screen may function as the user input unit 123 providing an input interface between the mobile terminal 100 and the user, and may provide an output interface between the mobile terminal 100 and the user.

The memory 170 stores data supporting various functions of the mobile terminal 100 . The memory 170 may store a plurality of application programs (application programs or applications) driven in the mobile terminal 100 , data for operation of the mobile terminal 100 , and commands. At least some of these application programs may be downloaded from an external server through wireless communication. In addition, at least some of these application programs may exist on the mobile terminal 100 from the time of shipment for basic functions (eg, incoming calls, outgoing functions, message reception, and outgoing functions) of the mobile terminal 100 . Meanwhile, the application program may be stored in the memory 170 , installed on the mobile terminal 100 , and driven to perform an operation (or function) of the mobile terminal by the controller 180 .

In addition to the operation related to the application program, the controller 180 generally controls the overall operation of the mobile terminal 100 . The controller 180 may provide or process appropriate information or functions to the user by processing signals, data, information, etc. input or output through the above-described components or by driving an application program stored in the memory 170 .

Also, the controller 180 may control at least some of the components discussed with reference to FIG. 1 in order to drive an application program stored in the memory 170 . Furthermore, in order to drive the application program, the controller 180 may operate by combining at least two or more of the components included in the mobile terminal 100 with each other.

The power supply unit 190 receives external power and internal power under the control of the controller 180 to supply power to each component included in the mobile terminal 100 . The power supply 190 includes a battery, and the battery may be a built-in battery or a replaceable battery.

At least some of the respective components may operate cooperatively with each other to implement an operation, control, or control method of a mobile terminal according to various embodiments to be described below. In addition, the operation, control, or control method of the mobile terminal may be implemented on the mobile terminal by driving at least one application program stored in the memory 170 .

The mobile terminal 100 according to the present invention includes the components described above in FIG. 1 , and may be used to monitor hazardous gas and provide notification information to a user.

A hazard gas notification system will be described with reference to FIG. 2 , and a notification method by the hazard gas notification system will be described with reference to FIG. 3 .

2 is a block diagram for explaining a hazardous gas notification system capable of notifying a user of a hazardous gas according to the present invention.

The gas notification system includes a gas sensor 200 , a mobile terminal and a server 300 .

The gas sensor 200 is configured to sense gas.

The gas sensor 200 may be manufactured and distributed in the form of a card or business card, and is configured to detect one or more predetermined gases distributed in the air. A user may carry the gas sensor 200 in a wallet or pocket, or insert it into clothing to detect harmful gas at a location where the user is located.

For example, the gas sensor 200 may generate gas information by sensing gas by power applied by the mobile terminal 100 in response to being tagged with the mobile terminal 100 . The mobile terminal 100 is configured to apply power to the gas sensor 200 in response to being tagged with the gas sensor 200, and the gas sensor 200 is configured to apply power to the food receiving space when the power is applied. It may be adapted to generate a difference in electrical conductivity in response to a gas within.

In this case, the gas sensor 200 includes a substrate, an antenna and a signal processing module disposed on the substrate, an electrode pair formed on the substrate and electrically connected to the signal processing module to receive power from the signal processing module; A conductive thin film formed on the electrode pair and a gas sensing film surrounding the conductive thin film and generating a difference in electrical conductivity according to a gas sensing reaction by receiving power from the electrode pair.

As another example, the gas sensor 200 may generate gas information such as the presence or absence of the detection target material and the concentration of the detection target material through color change. In other words, the gas sensor 200 may be configured to change color by gas in the air.

In this case, the gas sensor 200 includes a biomolecule that is a gas present in the air and a bioreceptor that selectively reacts, and a color transducer that changes color when the reaction occurs. can be made with

The color conversion part is a color-emitting material, a dye that changes color according to various reactions such as a Lewis or Bronsted acid-base reaction, due to a localized surface plasmon resonance phenomenon. It may be made of metal-based nanoparticles (gold, silver), and hydrogen vesicles.

For example, the gas sensor 200 includes a membrane made of nanofibers having a core-shell structure, the core of the nanofiber is made of a first polymer, and the shell of the nanofiber is It is composed of a second polymer including a color-changing dye material that changes color through reaction with gas molecules, and the color-changing dye material may be bound to the shell of the nanofiber and the outer surface of the nanofiber.

The color change dye material reacts with the gas molecules to change the frequency of the wavelength in the visible ray region, change the frequency of the wavelength out in the visible ray region, change the frequency of the wavelength in the outside of the visible ray region, or change the intensity of the wavelength Due to this, it may contain a material exhibiting color change characteristics.

The color change dye material is lead(II) acetate(Pb(CH3COO)2), iron(II) acetate(Fe(CH3COO)2), nickel(II) acetate(Ni(CH3COO)2), copper(II) acetate (Cu(CH3COO)2), cadmium acetate(Cd(CH3COO)2), cobalt(II) acetate(Co(CH3COO)2), manganese(II) acetate (Cu(CH3COO)2), bismuth(III) acetate ( Co(CH3COO)3), silver(I) acetate(Ag(CH3COO)), silver nitride (AgNO3), o-Tolidine, m-Tolidine, bromophenol blue+TBAH, methyl red + TBAH, thymol blue + TBAH, fluorescein, bromocresol purple, bromophenol red, LiNO3, 5-10-15-20-tetraphenylporphyrinatozinc (II), ammonium molybdate (NH4)2MoO4, 5-10-15-20-tetrakis(2,4,6-trimethylphenyl)porphyrinatozinc (II) may include at least one of

The color converter of the gas sensor 200 can implement various colors by adding RGB (Red, Green, Blue) using the three primary colors of light and CMYK (Cyan, Magenta, Yellow, Black) subtractive mixing using the three primary colors of color. have.

The color conversion unit may have different colors according to the concentration of a predetermined gas. Alternatively, at least one of saturation and brightness may be varied depending on the density even if the colors are the same.

The first polymer and the second polymer are polymethyl acrylate (PMA), polymethyl meta acrylate (PMMA, polymethyl meta acrylate), polyacrylic copolymer, polyvinyl acetate copolymer, polyvinyl acetate (PVAc) , polyvinyl acetate), polyvinylpyrrolidone (PVP, polyvinylpyrrolidone), polyvinyl alcohol (PVA, polymethyl alcohol), polyfurfuryl alcohol (PPFA), polystyrene (PS, polystyrene), polystyrene copolymer, polyethylene oxide (PEO) , polypropylene oxide (PPO), polyethylene oxide copolymer, polypropylene oxide copolymer, polycarbonate (PC), polyvinyl chloride (PVC), polycaprolactone, polyvinyl fluoride, polyvinylidene fluoride copolymer , polyimide, polyacrylonitrile (PAN, polyacrylonitrile), styrene-acrylonitrile (SAN, styrene-acrylonitrile), polyvinyl alcohol (PVA, polyvinyl alcohol), polycarbonate (PC, polycarbonate), Polyaniline (PANI, polyaniline), polyvinyl chloride (PVC, polyvinylchloride), polyvinylidene fluoride (PVDF, poly(vinylidene fluoride)), polyethylene terephthalate (PET, polyethylene terephthalate), polypropylene (PP, polypropylene) and polyethylene (PE, polyethylene), may include at least one polymer of styrene acrylonitrile (SAN, styrene acrylonitrile).

The gas sensor 200 may sense one or more gases to generate gas information of each gas. For example, the gas sensor 200 may include a first sensing module that performs a first color conversion in response to a first gas, and a second sensing module that performs a second color conversion in response to a second gas different from the first gas. It may include a sensing module.

When a plurality of sensing modules are provided in the gas sensor 200 , each sensing module may be disposed to be spaced apart from each other by a predetermined interval. The plurality of sensing modules may be arranged in a matrix form so that the mobile terminal 100 can independently recognize the color conversion of each sensing module.

The gas sensor 200 may be manufactured and distributed to sense different gases in a manufacturing step. For example, the gas sensors belonging to the first group may be configured to sense the first and second gases, and the gas sensors belonging to the second group may be configured to sense the third gas.

The gas sensor 200 may include a gas identification code so that gas sensors configured to sense different gases are identified. The gas identification code is configured to identify the gas sensor 200 .

The gas identification code is configured so that the mobile terminal 100 can use at least one of a camera and a short-range communication module to specify a gas that the gas sensor 200 can sense. For example, the gas identification code may be formed of a barcode or QR code that can be sensed by a camera, or an RFID tag (or transponder) that can be sensed by a short-range communication module.

The gas sensor 200 may further include a temperature sensor configured to change color according to temperature. The temperature sensor may have a first color in a first temperature range and a second color in a second temperature range. For example, the temperature sensor may have a blue color when detecting a temperature lower than the reference temperature, and may have a red color when detecting a temperature higher than the reference temperature. At least one of color saturation and brightness may be varied according to a difference between the reference temperature and the current temperature. A user may visually check the concentration and temperature of a specific gas through the gas sensor 200 .

The gas sensor 200 includes one or more gas modules capable of sensing different types of gases, and may be manufactured and distributed in various forms. The gas identification code is made to identify the date of manufacture of the gas sensor 200 and the type of gas that can be sensed. For example, a first gas sensor having a built-in first gas identification code for identifying the first card is installed on the first card, and a second gas identification code for identifying the second card is installed on the second card. A built-in second gas sensor may be installed.

The gas sensor 200 may include a gas identification code, and may generate gas information by sensing gas in the air.

The mobile terminal 100 receives various information from the gas sensor 200 and transmits it to the server 300, and based on the gas information, visually, audible and The output may be performed using at least one of the tactile methods.

The mobile terminal 100 may search for the gas identification code and the gas information using at least one of a camera and a short-range communication module, and may output the gas identification code and the gas information through the wireless communication unit 110 . .

For example, the mobile terminal 100 may search for the gas identification code by activating a camera in response to a user input, and search for gas information provided from the gas sensor 100 . In this case, the gas information may be searched for from an image captured by the camera.

For another example, the mobile terminal 100 may search for the gas identification code and the gas information in response to being tagged with the gas sensor 200 .

When receiving a plurality of different types of gas information from the gas sensor 200, the mobile terminal 100 may selectively use at least one piece of gas information from among the plurality of gas information based on the gas identification code. have.

For example, the gas sensor 200 may include a first gas module generating first gas information by detecting a first gas, a second gas module generating second gas information by detecting a second gas, and a third gas It can be mass-produced including a third gas module that detects and generates third gas information. When the first gas identification code is received, the mobile terminal 100 may select only the first gas information and provide notification information corresponding to the first gas information. When the second gas identification code is received, the mobile terminal 100 may select second and third gas information to provide notification information corresponding to the second and third gas information.

As such, when the notification information is generated, not all gas information received from the gas sensor 200 is used, but different gas information may be selectively used according to the gas sensor 200 . Although one gas sensor 200 is mass-produced, it is possible to provide different gases to a user using an identification code, thereby reducing costs.

Alternatively, the gas sensor 200 may be configured to sense different types of gas for each gas sensor. For example, the first gas sensor may be configured to sense the first gas, and the second gas sensor may be configured to sense the second and third gases. Which gas each gas sensor senses may be distinguished by the gas identification code.

The server 300 may determine a hazardous gas standard of the target gas based on the gas identification code, and may generate notification information of the target gas by applying the color code to the hazardous gas standard.

For example, the memory of the server 300 may include a first hazardous gas reference for the first target gas and a second hazardous gas reference for the second target gas. When the gas identification code received from the mobile terminal 100 corresponds to the first target gas, notification information is generated according to the first hazardous gas standard, and when the gas identification code corresponds to the second target gas, the second hazardous gas standard Accordingly, notification information may be generated. That is, even when the same color code is received, completely different notification information may be generated because different hazardous gas standards are applied depending on the target gas.

For example, if the gas sensor is manufactured for home use, a household gas identification code is attached to the gas sensor. The home gas sensor includes a gas module for identifying carbon dioxide, and the mobile terminal or server may determine whether the sensed carbon dioxide corresponds to a hazardous gas based on a home carbon dioxide gas standard.

On the other hand, when the gas sensor is manufactured for industrial use, an industrial gas identification code is attached to the gas sensor. The industrial gas sensor also includes a gas module for identifying carbon dioxide, but the mobile terminal or server may determine whether the sensed carbon dioxide corresponds to a hazardous gas based on the industrial carbon dioxide gas standard.

Even if the same concentration of carbon dioxide is detected, different notification information may be generated and provided to the user according to the gas identification code.

The server 300 may receive the gas identification code and the gas information from the mobile terminal 100 and store it in a memory. The server 300 may specify a gas based on a gas identification code and manage gas information and/or notification information corresponding to each gas as big data.

Furthermore, the server 300 can find useful correlations in big data by applying artificial intelligence (AI) technology, extract information that can be executed in the future, and use it for decision making. For example, by providing notification information to terminals located in a predetermined area using real-time notification information, damage caused by harmful gas can be minimized.

3 is a flowchart for explaining a hazardous gas notification method that can notify harmful gas using the mobile terminal of FIG. 1, and FIG. 4 is an exemplary diagram for explaining the operation of a mobile terminal according to the hazardous gas notification method of FIG. .

The gas notification method described in FIG. 3 may be executed through the mobile terminal 100 and/or the server 300 .

First, the mobile terminal 100 may search for a gas identification code (S310).

For example, the mobile terminal 100 may activate the camera 121 in response to a user input and output an image captured by the camera 121 on the display unit 151 . The mobile terminal 100 searches for a gas identification code from the image captured by the camera 121 . For example, the gas identification code may be a barcode or a QR code.

When the gas identification code is not searched, a notification such as "The gas identification code is not identified" may be output.

Next, the mobile terminal 100 may specify a target gas based on the gas identification code (S330).

The gas identification code may include an ID of the gas sensor. The mobile terminal 100 may check the name of the target gas, the date of manufacture, the manufacturing plant, and the distribution route through the server 300 using the gas identification code.

A Real Time Location System may be added to the gas identification code.

The mobile terminal 100 specifies the target gas based on information stored in the memory, or transmits the gas identification code to the server 300 and specifies the target gas based on information received from the server 300 . can do.

Next, the mobile terminal 100 may search for one or more color codes corresponding to the target gas from the image (S350).

The gas sensor 200 may sense one or more gases to generate gas information of each gas. For example, the gas sensor 200 may include a first sensing module that performs a first color conversion in response to a first gas, and a second sensing module that performs a second color conversion in response to a second gas different from the first gas. It may include a sensing module.

When a plurality of sensing modules are provided in the gas sensor 200 , each sensing module may be disposed to be spaced apart from each other by a predetermined interval. The plurality of sensing modules may be arranged in a matrix form so that the mobile terminal 100 can independently recognize the color conversion of each sensing module.

Each sensing module independently causes color conversion according to the gas to be detected. Accordingly, a color code generated by each sensing module may be searched for in the image.

The number of the color codes to be searched for from the image may vary according to the target gas. For example, one color code should be searched for the first gas identification code, and two color codes should be searched for the second gas identification code.

The mobile terminal 100 transmits the identified gas identification code to the server 300, and can receive information about at least one of the number and location of color codes to be searched for in the image from the server 300. have. Alternatively, information about at least one of the number and location of color codes corresponding to the target gas may be extracted from information stored in the memory.

The mobile terminal 100 may search for a partial area including the gas identification code among the entire area of the image.

For example, as shown in FIG. 4 , a partial area 410 in which a barcode is photographed may be searched among the entire area of the image output from the display 151 .

The mobile terminal 100 may determine a color code extraction region from the entire region of the image based on the size and location of the partial region. The number and positions of sensing modules included in the gas sensor 200 may vary according to the gas identification code, and the number and positions of sensing modules may be preset.

The color code includes a first color code for performing color conversion according to a first gas and a second color code for performing color conversion according to a second gas, and extracting a first color code corresponding to the first color code The region and the second color code extraction region corresponding to the second color code may be determined differently according to the size and position of the partial region.

For example, referring to FIG. 4 , two color code extraction areas may be disposed vertically spaced apart from each other by a predetermined interval at the top with respect to a partial area 410 including a barcode. That is, the first to second color code extraction regions 422 and 424 may be determined based on the partial region 410 extracted from the gas identification code.

The arrangement of the gas identification code and the color code may be variously modified according to embodiments, and the arrangement position of each color code may be identified through the gas identification code.

The mobile terminal 100 extracts each color code from each color code extraction area.

The mobile terminal 100 searches for at least one region having a color corresponding to the target gas from the color code extraction region, and the color may vary according to the target gas. Then, an average color of the searched at least one region may be calculated and determined as the color code.

For example, a color range in which the first color code can be expressed may be preset. An area outside the color range corresponds to meaningless data not related to the first color code. Accordingly, the mobile terminal 100 may search for at least one area within a predetermined color range from the color code extraction area, calculate an average color of the searched at least one area, and determine the color code as the color code. In the color code extraction area, an area outside the predetermined color range is excluded from determining the color code. This has the effect of increasing the accuracy of color code extraction.

Next, the mobile terminal 100 may generate notification information of the target gas based on the color code.

The mobile terminal 100 and/or the server 300 may generate notification information of the target gas based on the color code.

Specifically, it is possible to determine a hazardous gas standard of the target gas, and apply the color code to the hazardous gas standard to generate notification information of the target gas. Since different hazardous gas standards are applied depending on the target gas, different notification information may be generated even if the same color code is extracted. For example, even when the nitrogen concentration is the same, different notification information may be generated according to whether the product is classified for household use or industrial use. Usage is determined by the gas identification code.

Next, the mobile terminal 100 may output the notification information in at least one of a visual, tactile, and auditory method. For example, as shown in FIG. 4 , notification information 430 may be output to the display 151 of the mobile terminal 100 .

The mobile terminal 100 generates first notification information corresponding to the first color code based on the average color of the first color code extraction area, and generates the first notification information corresponding to the first color code based on the average color of the second color code extraction area. Second notification information corresponding to the second color code may be generated.

The notification information 430 may include a gas type and gas concentration of each gas determined by a color code, and numerical values determined by all gas information. The numerical value may correspond to an air cleanliness degree or an air pollution degree. Furthermore, the notification information 430 may include the name, concentration, and risk level of the target gas sensed by each gas module.

The mobile terminal or the server may determine the level of risk using the concentration of the sensed target gas according to the hazardous gas standard. Notification information may be output in different ways according to the level of risk. If there is a risk of gas poisoning, notification information can be output at the highest sound intensity so that you can evacuate immediately.

Meanwhile, the mobile terminal 100 according to the present invention can help a user to easily capture a color code.

5A and 5B are exemplary diagrams for explaining an operation of a mobile terminal that provides a visual guide line for detecting a color code.

As described above with reference to FIG. 4 , the number and location of color codes to be searched for may be determined by the gas identification code. The color code extraction region may be varied based on a partial region including the gas identification code in the image captured by the camera. For example, as shown in FIGS. 5A and 5B , two color codes may be disposed to be horizontally spaced apart from each other on top of the gas identification code.

The mobile terminal 100 may output the image captured by the camera to the display unit 151 and display a graphic object guiding the color code extraction area on the image. Since the color code extraction region varies according to a partial region including the gas identification code, at least one of the number, position, and size of the graphic object may vary according to the image.

For example, the first and second graphic objects 522 and 524 corresponding to the first and second color code extraction regions may be displayed as shown in FIG. 5A or displayed as shown in FIG. 5B according to the shooting method. can The user may visually recognize which part corresponds to the color code based on the graphic object displayed on the image.

6A to 6C are views for explaining a gas sensor according to an embodiment of the present invention.

The gas sensor 200 can detect various gases in real time, but for convenience of explanation, a structure for detecting oxygen and carbon dioxide will be described as an example. It may be configured to sense a gas other than oxygen and carbon dioxide according to an embodiment.

The gas sensor 200 includes a substrate 2 , an electrode pair 3 for applying power to a gas sensing film formed on the substrate 2 , a conductive thin film 4 formed on the electrode pair 3 , and the conductive A gas sensing film 5 surrounding the thin film 4 may be included.

The gas sensor 200 may include a battery to operate by itself without receiving power from another device, and may charge the battery using green energy. For example, the green energy may be sunlight.

The substrate 2 is an insulating substrate such as a synthetic resin film, glass, ceramic, or silicon substrate.

The electrode pair 3 is disposed on an insulating substrate to apply power to the gas sensing film 5 of the substrate 2 . In addition, a power supply for supplying external power to the electrode pair 3 and a measuring instrument 32 for measuring electrical characteristics of the gas sensing film 5 may be connected.

The conductive electrode pair 3 includes, as an example, gold (Au), platinum (Pt), silver (Ag), nickel (Ni), copper (Cu), tungsten (W), aluminum (Al) or an alloy thereof. It is formed of one or more metals selected from the group. Accordingly, the electrode pair 3 may generate a potential difference in the gas sensing film 5 by applying power to the gas sensing film 5 .

When a DC voltage is supplied to the electrode pair 3 , the electrode pair 3 is an electrode having relatively positive and negative polarities. In addition, an alternating voltage may be supplied to the electrode pair 3 , wherein the electrode pair 3 may be an electrode having a predetermined potential and an electrode maintaining a ground potential, respectively, and the electrode pair 3 is a voltage from a power supply can be supplied.

The measuring instrument 32 may measure the electrical characteristics of the gas sensing film 5 by monitoring a difference in electrical conductivity of the gas sensing film 5 .

The conductive thin film 4 formed on the electrode pair 3 can increase the response speed and sensitivity of the gas sensor by promoting a decomposition reaction and a bonding reaction of a predetermined sensing target gas.

The conductive thin film 4 acts as a catalyst to promote a sensing reaction of the gas sensing film 5 with respect to the sensing target gas. The gas sensing layer 5 is characterized in that at least one selected from the group of semiconductor metal oxides including titanium oxide (TiO4), tin oxide (SnO2), or alloys thereof, respectively.

In the above description, the gas sensing film 5 was described as an example, but in a similar manner as described above, various kinds of materials having different electrical conductivity may be applied as the gas sensing film 5 .

Although not shown in the drawings, the gas sensor 200 may be provided with an alarm output unit for outputting an alarm in at least one of visual, auditory and tactile methods. When a gas exceeding a preset concentration is sensed, the alarm output unit may output an alarm. The alarm may be broadcast through a separately provided wireless communication unit.

The gas sensor 200 may divide the gas sensing film 5 into a plurality of regions according to a predetermined condition. In addition, at least one of the size, shape, and position of each of the plurality of regions may vary according to the predetermined condition.

For example, as shown in FIG. 6B , a first region 610 including the center of the gas sensing film 5 , and a second region 620 surrounding the first region 610 , the gas The sensing film may be distinguished.

Depending on the amount of fine dust or the temperature, the edge of the gas sensing film 5 may be a region generating noise. It is possible to improve the accuracy of sensing by excluding some regions that may generate inaccurate information from the sensing region.

For another example, as shown in FIG. 6C , the entire region of the gas sensing film 5 may be divided into an upper region 630 and a lower region 640 based on one end of the gas sensor 200 . . Here, one end of the gas sensor 200 is provided with a suction unit for sucking gas into the body, and may refer to an end portion closest to the suction unit among the edges of the body.

As the fine dust concentration increases and/or the temperature increases, the upper region 630 may increase and the lower region 640 may decrease. This is because fine dust is sucked in through the suction unit and accumulated in the upper region 630 , thereby generating noise and lowering the accuracy of gas sensing.

As described above, in the gas sensor according to the present invention, at least one of the size, shape, and location of each of the plurality of regions may be differently set according to a predetermined condition in order to increase the accuracy of gas sensing.

The predetermined condition may be defined by various variables, such as a location defined by atmospheric pressure, latitude and longitude, and weather conditions, as well as fine dust concentration and/or temperature.

The gas sensor 200 may store a database defining the predetermined condition and areas corresponding thereto in a memory. The memory may automatically update the database when the gas sensor 200 and an external network are connected.

The present invention described above can be implemented as computer-readable code (or application or software) on a medium in which a program is recorded. The above-described hazard gas notification method may be realized by a code stored in a memory or the like.

The computer-readable medium includes all types of recording devices in which data readable by a computer system is stored. Examples of computer-readable media include Hard Disk Drive (HDD), Solid State Disk (SSD), Silicon Disk Drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. There is also a carrier wave (eg, transmission over the Internet) that is implemented in the form of. In addition, the computer may include a processor or a control unit. Accordingly, the above detailed description should not be construed as restrictive in all respects but as exemplary. The scope of the present invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention.

Claims (7)

A hazardous gas notification method that can provide a hazardous gas notification using a mobile terminal having a camera and a display,
searching for a gas identification code from the image taken by the camera;
specifying a target gas based on the gas identification code;
searching for one or more color codes corresponding to the target gas from the image;
generating notification information of the target gas based on the color code; and
and outputting the notification information to the display. According to claim 1,
The step of searching for the color code,
searching for a partial region including the gas identification code among the entire region of the image;
determining a color code extraction region from among the entire region of the image based on the size and position of the partial region; and
and searching for the color code in the color code extraction area. 3. The method of claim 2,
The step of searching for the color code in the color code extraction area includes:
searching for at least one region having a color corresponding to the target gas from the color code extraction region, wherein the color is changed according to the target gas; and
and calculating an average color of the found at least one region and determining the color code as the color code. 4. The method of claim 3,
The color code includes a first color code for performing color conversion according to a first gas and a second color code for performing color conversion according to a second gas,
The first color code extraction region corresponding to the first color code and the second color code extraction region corresponding to the second color code are determined differently depending on the size and position of the partial region,
The step of generating the notification information includes:
generating first notification information corresponding to the first color code based on the average color of the first color code extraction region; and
and generating second notification information corresponding to the second color code based on the average color of the second color code extraction area. 3. The method of claim 2,
outputting the image to the display; and
Hazardous gas notification method, characterized in that it further comprises the step of displaying a graphic object guiding the color code extraction area on the image According to claim 1,
Hazardous gas notification method, characterized in that the number of the color codes searched for from the image varies according to the target gas. a camera that takes pictures;
a display for displaying the image; and
Searching for a gas identification code from the image, searching for one or more color codes corresponding to a target gas based on the gas identification code, and turning the display to display notification information of the target gas corresponding to the color code. Includes a control unit to control,
The number of the color codes searched for from the image according to the target gas is variable.

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