WO2017073426A1 - 漏洩ガス検出装置および漏洩ガス検出方法 - Google Patents
漏洩ガス検出装置および漏洩ガス検出方法 Download PDFInfo
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- WO2017073426A1 WO2017073426A1 PCT/JP2016/080955 JP2016080955W WO2017073426A1 WO 2017073426 A1 WO2017073426 A1 WO 2017073426A1 JP 2016080955 W JP2016080955 W JP 2016080955W WO 2017073426 A1 WO2017073426 A1 WO 2017073426A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/38—Investigating fluid-tightness of structures by using light
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/002—Investigating fluid-tightness of structures by using thermal means
Definitions
- the present invention relates to a leak gas detection device and a leak gas detection method for detecting a predetermined gas leaked into a space, and more particularly to a leak gas detection device and a leak gas detection method capable of displaying a leak position in a display mode corresponding to its reliability.
- a leak gas detection device and a leak gas detection method capable of displaying a leak position in a display mode corresponding to its reliability.
- Patent Document 1 discloses an abnormality detection apparatus.
- the abnormality detection device disclosed in Patent Document 1 includes a plurality of visible light imaging means for imaging a monitored place, a display means for displaying an image signal, and an abnormality that occurs at the monitored place by processing the image signal. And a display / abnormality detection switching means for supplying an image signal from one or a plurality of imaging means to the display means and an image signal from the remaining imaging means to the processing means. Including.
- the processing means in this abnormality detection apparatus obtains a difference between the image A and an image B shifted from the image A by time ⁇ t1 for each pixel, and compares each difference with a threshold value to obtain a binary image.
- a change area between the image A and the image B in the binarized image is generated as a change occurrence area to detect the abnormality, and the display means displays the obtained change occurrence area (Patent Document) 1 (see FIG. 4).
- leak position By the way, in order to cope with the gas leakage, it is necessary to identify the position where the gas leaks (leakage position). When trying to obtain this leak position from an image by image processing, atmospheric conditions such as temperature and rainfall affect as a disturbance. For this reason, the leak position can be obtained relatively accurately (when the error is small) and so on. If not (if the error is large). If the obtained leak position includes a relatively large error due to the disturbance and is not relatively accurate, if the leak position is displayed as it is, the leak position is deviated from the true leak position. The worker who arrived at the site of the leaked position had to search for the leaked position because the gas that should have leaked did not leak at that position, and it took time to deal with the leak. End up. In addition, when the process for obtaining the leak position is repeated and the leak position is not obtained relatively accurately due to the disturbance, the leak position differs for each process and the leak position varies. Because it is displayed at the position, the display flickers.
- Patent Document 1 when the leak position is not obtained relatively accurately, it is not assumed and there is no suggestion thereof.
- the present invention has been made in view of the above-described circumstances, and its object is to display the reliability of the leakage position including the degree of error, and the leakage gas detection device and the leakage gas detection method capable of reducing the flicker. Is to provide.
- the leakage gas detection device and the leakage gas detection method according to the present invention determine the leakage position of the gas that has leaked into the space based on the image of the target region, and based on meteorological element data, the reliability of the calculated leakage position
- the reliability which is an index representing the degree of the above, is obtained, and the obtained leakage position is displayed on the display unit within a range including the leakage position.
- the leakage gas detection device and the leakage gas detection method according to the present invention change the size of the range according to the obtained reliability. Therefore, the leakage gas detection device and the leakage gas detection method according to the present invention can display the reliability of the leakage position including the degree of error, and can reduce the flicker.
- it is a schematic diagram for demonstrating the display mode of the leakage position in case reliability is 100%.
- FIG. 1 is a block diagram showing a configuration of a leakage gas detection device in the embodiment.
- Drawing 2 is a mimetic diagram for explaining a use situation of a leaking gas detection device in an embodiment.
- FIG. 3 is a diagram illustrating an example of a reliability table in the leakage gas detection device of the embodiment.
- FIG. 4 is a diagram illustrating an example of a range size table in the leakage gas detection device of the embodiment.
- the leaked gas detection device includes, for example, a leak position of the gas leaked into the space from the gas storage unit from an image of a predetermined target region including a gas storage unit that stores gas such as a gas pipe (pipe) or a gas tank.
- This is a device for displaying the obtained leakage position.
- the leak gas detection device in the embodiment displays the obtained leak position on a display unit in a range (area) including the leak position, and the size of the range is an index indicating the degree of reliability with respect to the leak position. Change according to certain reliability. The reliability is preferably obtained based on a measurement result of a predetermined weather element.
- the leakage gas detection device in the embodiment includes an image acquisition unit that acquires an image of a target region, a weather element acquisition unit that acquires data on a weather element, and an image of the target region acquired by the image acquisition unit.
- a leakage position processing unit for determining the leakage position of the gas leaked into the space, and reliability of the leakage position determined by the leakage position processing unit based on the weather element data acquired by the weather element acquisition unit.
- a reliability processing unit that obtains a reliability that is an index representing the degree, and a display processing unit that can display the leakage position obtained by the leakage position processing unit on the display unit in a range including the leakage position. The display processing unit changes the size of the range according to the reliability obtained by the reliability processing unit.
- Such a leakage gas detection device D in the present embodiment includes, for example, a control processing unit 4, an interface unit (IF unit) 7, and a storage unit 8, as shown in FIG. Then, the infrared imaging unit 1, the visible imaging unit 2, the meteorological element measurement unit 3, the input unit 5, and the display unit 6 are further provided.
- the infrared imaging unit 1 is an apparatus that is connected to the control processing unit 4 and images the target region in the infrared under the control of the control processing unit 4 and generates an infrared image of the target region.
- the infrared imaging unit 1 is, for example, an imaging optical system that forms an infrared optical image (infrared optical image) of a target region on a predetermined imaging surface, and a light receiving surface that is aligned with the imaging surface.
- An infrared image sensor that converts an infrared optical image of the target region into an electrical signal, and an infrared image processing unit that generates infrared image data by performing image processing on the output of the infrared image sensor.
- Such as a camera Such as a camera.
- the infrared imaging unit 1 outputs an infrared image (infrared image data) of the target area to the control processing unit 4.
- the visible imaging unit 2 is an apparatus that is connected to the control processing unit 4 and that visually captures a target region under the control of the control processing unit 4 and generates a visible image of the target region.
- the visible imaging unit 2 is, for example, an imaging optical system that forms an optical image of a target region (optical image of visible light) on a predetermined imaging surface, and a light receiving surface that is aligned with the imaging surface, An image sensor that converts an optical image of the target region into an electrical signal, and a visible camera that includes a visible image processing unit that generates visible image data by performing image processing on the output of the image sensor.
- the visible imaging unit 2 outputs a visible image (visible image data) of the target area to the control processing unit 4.
- the meteorological element measurement unit 3 is a device that is connected to the control processing unit 4 and measures a predetermined meteorological element according to the control of the control processing unit 4.
- the weather element represents an atmospheric state (weather), and preferably includes one or more of humidity, rainfall, wind speed, solar radiation, and temperature.
- the weather element is humidity (relative humidity or absolute humidity)
- the weather element measurement unit 3 includes a hygrometer.
- the weather element measurement unit 3 includes a rain gauge.
- the weather element measurement unit 3 includes an anemometer.
- the weather element measuring unit 3 includes a solar radiation meter.
- the weather element measurement unit 3 when the weather element is air temperature, the weather element measurement unit 3 includes a thermometer.
- the reliability is obtained based on the relative humidity and the wind speed, and the meteorological element measurement unit 3 is configured to include a hygrometer and an anemometer.
- the meteorological element measurement unit 3 outputs the measurement results of the measured meteorological elements (relative humidity and wind speed in the present embodiment) to the control processing unit 4.
- the input unit 5 is connected to the control processing unit 4 and executes, for example, various commands such as a command for instructing start of a detection operation for detecting a leaked gas, and detection of leaked gas such as an input of an identifier of a target region, for example.
- This is a device that inputs various data necessary for the operation to the leaked gas detection device D, such as a plurality of input switches, keyboards, and mice assigned with predetermined functions.
- the display unit 6 is connected to the control processing unit 4, and in accordance with control of the control processing unit 4, commands and data input from the input unit 5, and a gas cloud and gas detected by the leakage gas detection device D leak out.
- a touch panel may be configured from the input unit 5 and the display unit 6.
- the input unit 5 is a position input device that detects and inputs an operation position such as a resistance film type or a capacitance type.
- a position input device is provided on the display surface of the display device, one or more input content candidates that can be input to the display device are displayed, and the user touches the display position where the input content to be input is displayed. Then, the position is detected by the position input device, and the display content displayed at the detected position is input to the leakage gas detection device D as the operation input content of the user.
- the leak gas detection device D that is easy for the user to handle is provided.
- the IF unit 7 is a circuit that is connected to the control processing unit 4 and inputs / outputs data to / from an external device according to the control of the control processing unit 4.
- an interface circuit of an RS-232C that is a serial communication system
- the IF unit 7 is a communication card or the like that communicates by wire or wirelessly, and may communicate with an external device such as a server device via a communication network such as an Ethernet environment (Ethernet is a registered trademark). Is).
- the storage unit 8 is a circuit that is connected to the control processing unit 4 and stores various predetermined programs and various predetermined data under the control of the control processing unit 4.
- the various predetermined programs include, for example, a control program for controlling each part of the leakage gas detection device D according to the function of each part, and an infrared image of the target area generated by the infrared imaging unit 1, Based on a gas cloud processing program for extracting a gas cloud image region of a gas cloud formed by leaked gas leaked into the space from the gas storage unit, or an infrared image of the target region generated by the infrared imaging unit 1, the gas A leakage position processing program for obtaining the leakage position of the leaked gas leaked into the space from the storage section, and the reliability of the leakage position obtained by the leakage position processing program based on the measurement result of the weather element measured by the weather element measurement section 3
- the reliability processing program for obtaining the reliability which is an index representing the degree of sexuality, and the leakage position obtained by the leakage position processing program, the
- a control processing program such as a warning processing program to be performed is included.
- the various predetermined data includes a correspondence relationship between the measurement result of the weather element and the reliability (reliability) used for obtaining the reliability based on the measurement result of the weather element measured by the weather element measurement unit 3. Degree correspondence), the correspondence between the reliability and the size of the range (range size correspondence) used for obtaining the size of the range for displaying the leakage position based on the reliability, etc. Data necessary for executing each program is included.
- the storage unit 8 includes, for example, a ROM (Read Only Memory) that is a nonvolatile storage element, an EEPROM (Electrically Erasable Programmable Read Only Memory) that is a rewritable nonvolatile storage element, and the like.
- the storage unit 8 includes a RAM (Random Access Memory) serving as a working memory of the so-called control processing unit 4 that stores data generated during the execution of the predetermined program.
- the storage unit 8 may include a hard disk having a relatively large storage
- the storage unit 8 functionally includes a reliability information storage unit 81 and a range size information storage unit 82 in order to store the reliability correspondence and the range size correspondence in advance.
- the reliability information storage unit 81 stores the reliability correspondence relationship in advance.
- the reliability correspondence relationship is a correspondence relationship between relative humidity, wind speed, and reliability, and is stored in advance in the reliability information storage unit 81 in a table format.
- the reliability table 810 representing the correspondence relationship between the relative humidity and the wind speed and the reliability includes, in each column of the two-dimensional matrix including each row of each humidity 812 and each column of each wind speed 811. It is configured by registering the respective reliability corresponding to them. For example, in the column of 1 row and 1 column, 100% reliability corresponding to the case where the relative humidity is 0% or more and less than 25% and the wind speed is 0 m / s or more and less than 3 m / s is registered. In the column column, 40% reliability corresponding to the case where the relative humidity is 50% or more and less than 75% and the wind speed is 3 m / s or more and less than 15 m / s is registered.
- the weather element is humidity
- the correspondence between the humidity and the reliability is appropriately set in advance so that the reliability decreases as the humidity increases.
- the weather element is rainfall
- the correspondence between the rainfall and the reliability is appropriately set in advance so that the reliability decreases as the rainfall increases.
- the weather element is a wind speed
- the correspondence relationship between the wind speed and the reliability is appropriately set in advance so that the reliability decreases as the wind speed increases.
- the weather element is a solar radiation amount
- the correspondence relationship between the solar radiation amount and the reliability is appropriately set in advance so that the reliability decreases as the solar radiation amount decreases.
- the weather element is air temperature
- the range size information storage unit 82 stores the range size correspondence relationship in advance.
- the size of the range is appropriately associated with the reliability so that the size of the range increases as the reliability decreases.
- the range size correspondence relationship is stored in advance in the range size information storage unit 82 in a table format.
- the size of the range is represented by the number of divisions that divide the entire screen, and a range size table 820 indicating the correspondence between the reliability and the size of the range is shown in FIG.
- a reliability field 821 for registering reliability and a division number field 822 for registering the number of divisions corresponding to the reliability registered in the reliability field 821 are provided, and each reliability has a record.
- the corresponding division number field 822 has 24 ⁇ 32 (the vertical length in the screen vertical direction is divided into 24 equally.
- the size of the range is the size of one section when the entire screen is equally divided into 768.
- a reliability of 20% is registered in the reliability field 821 in the record on the fifth line, and an error (warning) is registered in the division number field 822 corresponding thereto. In this case, an error is displayed. In this embodiment, a warning is executed as an error display as described later.
- control processing unit 4 controls each part of the leakage gas detection device D according to the function of each part, detects the leakage position of the leakage gas leaked into the space from the gas storage part, and detects this leakage. This is a circuit for obtaining the reliability of the position and displaying the leakage position, the reliability and the warning.
- the control processing unit 4 includes, for example, a CPU (Central Processing Unit) and its peripheral circuits.
- the control processing unit 4 functions as a control unit 41, a gas cloud processing unit 42, a leak position processing unit 43, a reliability processing unit 44, a warning processing unit 45, and a display processing unit 46 by executing a control processing program. Configured.
- the control unit 41 is for controlling each part of the leaked gas detection device D according to the function of each part.
- the control unit 41 acquires the measurement result of the weather element (relative humidity and wind speed in this embodiment) from the weather element measurement unit 3.
- the gas cloud processing unit 42 extracts a gas cloud image region of a gas cloud formed of leaked gas leaked into the space from the gas storage unit based on the infrared image of the target region generated by the infrared imaging unit 1. is there.
- the leakage gas detection device D can capture the infrared image and the visible image in the target region with the infrared imaging unit 1 and the visible imaging unit 2, respectively.
- each of the imaging direction of the infrared imaging unit 1 and the imaging direction of the visible imaging unit 2 is fixedly arranged toward the target area.
- the infrared imaging unit 1 arranged in this manner images infrared rays (background radiation infrared rays and background radiation infrared rays) radiated (radiated) by individual objects (background objects) OB present in the target region.
- background objects background objects
- the background radiation infrared rays reach the infrared imaging unit 1 via the gas cloud GS.
- the gas cloud GS absorbs a part of the background radiation infrared rays at the wavelength of the absorption line unique to the gas, and radiates infrared rays according to the temperature of the gas cloud GS itself.
- the amount of absorption with respect to the background radiation infrared ray follows the concentration of the gas cloud GS and the thickness of the gas cloud GS.
- the gas cloud processing unit 42 extracts, for example, a pixel region having a luminance value change amount per unit time that is equal to or less than a predetermined determination threshold value Dth from the infrared image of the target region.
- a gas cloud image region of the gas cloud GS can be extracted.
- the leakage position processing unit 43 obtains the leakage position of the leakage gas leaked from the gas storage unit into the space based on the infrared image of the target area generated by the infrared imaging unit 1.
- the leak position processing unit 43 can estimate, for example, by tracing a plurality of time-series gas cloud image regions back in time. Further, for example, the leakage position processing unit 43 can estimate by obtaining a plurality of optical flows in the gas cloud GS based on a plurality of gas cloud image regions continuous in time series, and tracing the plurality of optical flows back in time.
- the reliability processing unit 44 obtains reliability, which is an index representing the degree of reliability with respect to the leakage position obtained by the leakage position processing unit 43, based on the measurement result of the weather element measured by the weather element measurement unit 3. is there. More specifically, in the present embodiment, the reliability processing unit 44 stores the reliability corresponding to the relative humidity and the wind speed measured by the weather element measurement unit 3 in the reliability information storage unit 81. Obtained from 810. For example, when the relative humidity is 45% and the wind speed is 1 m / s, the reliability processing unit 44 sets the reliability to 80% from the reliability table 810.
- the warning processing unit 45 gives a warning that the reliability is below the threshold when the reliability obtained by the reliability processing unit 44 is below a predetermined threshold. More specifically, in the present embodiment, the warning processing unit 45 determines that the reliability such as “the calculation of reliability is an error” or the like when the reliability calculated by the reliability processing unit 44 is 20% or less. Is displayed on the display unit 6 so as to display an error message indicating that the value is equal to or less than the threshold value (20% in this example).
- the display processing unit 46 includes a visible image of the target region generated by the visible imaging unit 2, a gas cloud image region extracted by the gas cloud processing unit 42, a leakage position obtained by the leakage position processing unit 43, and a reliability processing unit 44. And the warning determined by the warning processing unit 45 as necessary is displayed on the display unit 6. More specifically, the display processing unit 46 superimposes the gas cloud image region extracted by the gas cloud processing unit 42 on the visible image of the target region generated by the visible imaging unit 2 and displays it on the display unit 6.
- the leakage position obtained by the leakage position processing unit 43 can be displayed on the display unit 6 in a range including the leakage position, and the size of the range is determined according to the reliability obtained by the reliability processing unit 44.
- the display processing unit 46 stores the size of the range corresponding to the reliability obtained by the reliability processing unit 44 in the range size information storage unit 82 regarding the display of the leakage position and the reliability.
- the size of the range is associated with the reliability so that the size of the range increases as the reliability decreases.
- the size of the range is changed so that the size of the range increases as the reliability obtained by the reliability processing unit 44 decreases. Further, when a warning is required according to the determination result of the necessity of warning by the warning processing unit 45, the display processing unit 46 displays “the calculation of reliability is an error” or the like as described above. 6 is displayed.
- the leakage gas detection device D includes the infrared imaging unit 1, the visible imaging unit 2, the meteorological element measurement unit 3, the control processing unit 4, the input unit 5, the display unit 6, the IF unit 7, and the storage unit 8.
- a single unit may be configured.
- the infrared imaging unit 1 corresponds to an example of an image acquisition unit that acquires an image of a target region
- the weather element measurement unit 3 corresponds to an example of a weather element acquisition unit that acquires data on a weather element.
- the leakage gas detection device D includes a sensor unit configured by combining the infrared imaging unit 1, the visible imaging unit 2, and the meteorological element measurement unit 3, and the control processing unit 4, the input unit 5, and the display unit 6.
- the IF unit 7 and the storage unit 8 may be configured as a single unit, and may include a main body unit that is communicably connected to the sensor unit by wire or wirelessly.
- the IF unit 7 corresponds to another example of an image acquisition unit that acquires an image of the target region, and further corresponds to another example of a weather element acquisition unit that acquires data related to a weather element.
- the display unit 6 may be further separated in a state where it is communicably connected by wire or wireless so that it can be monitored at a remote place, and may be arranged at a remote place.
- FIG. 5 is a flowchart showing the operation of the leaked gas detection device in the embodiment.
- FIG. 6 is a schematic diagram for explaining a display mode of a leakage position when the reliability is 100% in the leakage gas detection device of the embodiment.
- FIG. 7 is a schematic diagram for explaining a display mode of a leakage position when the reliability is 80% in the leakage gas detection device of the embodiment.
- FIG. 8 is a schematic diagram for explaining a display mode of a leakage position when the reliability is 60% in the leakage gas detection device of the embodiment.
- FIG. 9 is a schematic diagram for explaining a display mode of a leakage position when the reliability is 40% in the leakage gas detection device of the embodiment.
- Such a leakage gas detection device D is arranged with the imaging direction of the infrared imaging unit 1 and the imaging direction of the visible imaging unit 2 facing the target region, and a power switch (not shown) is turned on by the user (operator). Then, the control processing unit 4 executes initialization of each necessary unit, and by executing the control processing program, the control processing unit 4 includes the control unit 41, the gas cloud processing unit 42, the leak position processing unit 43, the reliability.
- the processing unit 44, the warning processing unit 45, and the display processing unit 46 are functionally configured. Then, when the user inputs and instructs the start of the detection operation from the input unit 5, the gas detection operation is started for the target region.
- the leakage gas detection device D captures the target region with infrared by the infrared imaging unit 1, and generates and acquires an infrared image of the target region.
- the infrared image (image data of the infrared image) of the target area is output from the infrared imaging unit 1 to the control processing unit 4 (S1).
- the leaking gas detection device D captures and captures the target area with the visible imaging unit 2, and generates and acquires a visible image of the target area.
- the visible image of the target area (image data of the visible image) is output from the visible imaging unit 2 to the control processing unit 4 (S2).
- the leakage gas detection device D determines whether or not the gas cloud GS formed by the leakage gas leaked from the gas storage unit is generated in the space of the target region by the control processing unit 4 (S3).
- the control processing unit 4 causes the gas cloud processing unit 42 to extract a gas cloud image region of the gas cloud GS based on the infrared image of the target region generated by the infrared imaging unit 1.
- the control processing unit 4 determines that the gas cloud GS is not generated, and executes a process S9 described later.
- the control processing unit 4 determines that the gas cloud GS is generated, and executes the next process S4.
- the leak gas detection device D obtains the leak position of the leak gas leaked from the gas storage unit into the space based on the infrared image of the target area generated by the infrared imaging unit 1 by the leak position processing unit 43. .
- the leakage gas detection device D acquires the measurement result of the weather element (relative humidity and wind speed in this embodiment) from the weather element measurement unit 3 by the control unit 41 (S5).
- the leakage gas detection device D obtains the reliability of the leakage position obtained by the leakage position processing unit 43 based on the measurement result of the weather element measured by the weather element measurement unit 3 by the reliability processing unit 44 ( S6). More specifically, the reliability processing unit 44 obtains the reliability corresponding to the relative humidity and wind speed measured by the weather element measurement unit 3 from the reliability table 810 stored in the reliability information storage unit 81.
- the leakage gas detection device D determines whether or not a warning is required by the warning processing unit 45 (S7). More specifically, the warning processing unit 45 determines whether or not a warning is necessary by determining whether or not the reliability obtained by the reliability processing unit 44 is equal to or less than the threshold, and the reliability processing unit 44 When the calculated reliability is equal to or less than the threshold, it is determined that a warning is necessary. When the reliability calculated by the reliability processing unit 44 exceeds the threshold, it is determined that a warning is unnecessary.
- the leaked gas detection device D uses the display processing unit 46 to obtain the visible image of the target region generated by the visible imaging unit 2 and the gas extracted by the gas cloud processing unit 42, which are obtained by the above-described processes.
- the cloud image area, the leakage position obtained by the leakage position processing unit 43, the reliability obtained by the reliability processing unit 44, and the warning determined by the warning processing unit 45 as necessary are displayed on the display unit 6 (S8).
- the display processing unit 46 aligns and superimposes the gas cloud image region extracted by the gas cloud processing unit 42 on the visible image of the target region generated by the visible imaging unit 2.
- the leakage position displayed on the display unit 6 and obtained by the leakage position processing unit 43 is displayed on the display unit 6 in a range including the leakage position, and the range is determined according to the reliability obtained by the reliability processing unit 44.
- the reliability with respect to the leakage position is displayed on the display unit 6 by changing the size of.
- the display processing unit 46 stores the size of the range corresponding to the reliability obtained by the reliability processing unit 44 in the range size information storage unit 82 regarding the display of the leakage position and the reliability.
- the range is obtained from the range size table 820, and the range including the leakage position is displayed on the display unit 6 with the size of the obtained range.
- the vertical position is equally divided into 12 and the horizontal width is equally divided into 16 so that the entire screen is equally divided into 192, so that the leakage position RP2 is the size of the above-mentioned range. It is displayed on the display unit 6.
- the leakage position RP4 is set to the size of the above-mentioned range when the entire screen is divided into 12 parts equally by dividing the longitudinal part into three parts and dividing the horizontal part into four parts. It is displayed on the display unit 6.
- the leakage position RP is displayed by, for example, displaying the outline of the range in a predetermined color (for example, red or orange), blinking the entire range, or displaying the entire range within a predetermined hatch ( For example, it is displayed by shading or oblique lines.
- the boundary line (grid line) of each section may be displayed on the display unit 6 by a predetermined line type such as a thin line or a broken line.
- the display processing unit 46 displays “Reliability calculation is an error” or the like on the display unit 6 ( (Not shown).
- the leakage gas detection device D determines whether or not the input processing unit 5 has accepted the end of the detection operation by the user by the control processing unit 4, and terminates the detection operation. If the input unit 5 accepts the process (Yes), the process ends. If the input unit 5 does not accept the end of the detection operation (No), the process returns to the process S1.
- the leaked gas detection device D and the leaked gas detection method implemented in the present embodiment display the leak position obtained by the leak position processing unit 43 in a range (area) including the leak position. Furthermore, the size of the range is changed according to the reliability. For this reason, since the leak gas detection device D and the leak gas detection method display the leak position in a range, the flicker can be reduced, and an error (the true leak position and the obtained leak position can be reduced by the size of the range.
- the reliability of the leak position can be displayed including the degree of difference. Therefore, the user can more easily recognize the reliability of the leakage position including the degree of error by visual recognition of the size of the range, and whether to urgently go to the site according to the reliability. Appropriate decisions can be made.
- the leakage position obtained by the leakage position processing unit varies as the reliability decreases.
- the leakage gas detection device D and the leakage gas detection method have the above ranges as the reliability obtained by the reliability processing unit 44 decreases. Since the size is increased, the flicker can be further reduced.
- the leaked gas detection device D and the leaked gas detection method further include a warning processing unit 45, so that the user can be alerted that the reliability is equal to or lower than a threshold value.
- the leakage gas detection device D and the leakage gas detection method may include one or more of humidity, rainfall, wind speed, solar radiation, and air temperature (in the above-described typical relative humidity and wind speed, which affect the reliability. ) As the weather element, the reliability can be appropriately evaluated.
- the warning processing unit 45 displays a warning on the display unit 6 by displaying an error by a message.
- the warning processing unit 45 uses the leakage position obtained by the leakage position processing unit 43 as the warning.
- the included range may be filled in the display processing unit 46 with a predetermined color (for example, yellow). That is, when the reliability obtained by the reliability processing unit 44 is equal to or lower than a predetermined threshold, the warning processing unit 45 uses the display processing unit 46 to determine the range including the leakage position obtained by the leakage position processing unit 43, for example. Fill with a predetermined color such as yellow.
- the leak gas detection device D and the leak gas detection method fills the range including the leak position obtained by the leak position processing unit 43 with a predetermined color as the warning, it is reliable to visually recognize the range. The user can be alerted that the degree is below the threshold.
- the leaked gas detection device is based on an image acquisition unit that acquires an image of a target region, a weather element acquisition unit that acquires data on a weather element, and an image of the target region acquired by the image acquisition unit.
- the leak position processing unit for obtaining the leak position of the gas leaked into the space, and the degree of reliability with respect to the leak position obtained by the leak position processing unit, based on the weather element data obtained by the weather element obtaining unit
- a reliability processing unit that obtains a reliability that is an index, and a display processing unit that can display the leakage position obtained by the leakage position processing unit on a display unit within a range including the leakage position.
- the processing unit changes the size of the range according to the reliability obtained by the reliability processing unit.
- the image acquisition unit is an interface unit that receives data input from an external device, and the interface unit captures a target region as the external device and images the target region.
- the image of the target area is input from the imaging unit that generates the image.
- the image acquisition unit is an imaging unit that captures an image of the target region and generates an image of the target region.
- the weather element acquisition unit is an interface unit that receives data input from an external device, and the interface unit measures a predetermined weather element as the external device. Data related to the meteorological element is input from the measurement unit.
- the weather element acquisition unit is a weather element measurement unit that measures a predetermined weather element.
- Such a leak gas detection device displays the leak position obtained by the leak position processing unit in a range (area) including the leak position, and further changes the size of the range according to the reliability. For this reason, since the leak gas detection apparatus displays the leak position in a range, the flicker can be reduced, and the reliability of the leak position can be displayed including the degree of error in the size of the range. Therefore, the user can more easily recognize the reliability of the leak position including the degree of error (difference between the true leak position and the obtained leak position) by visually recognizing the size of the range. In response, it is possible to make a more appropriate decision, such as whether to rush to the site or see how it should look.
- the display processing unit has a size of the range such that the size of the range increases as the reliability obtained by the reliability processing unit decreases. To change.
- the leakage position obtained by the leakage position processing unit varies as the reliability decreases, but such a leakage gas detection device increases the size of the range as the reliability obtained by the reliability processing unit decreases. Therefore, the flicker can be further reduced.
- a warning is given to warn that the reliability is equal to or lower than the threshold.
- a processing unit is further provided.
- Such a leak gas detection device further includes the warning processing unit, so that the user can be alerted that the reliability is equal to or less than a threshold value.
- the warning processing unit causes the display processing unit to fill the range including the leakage position obtained by the leakage position processing unit with a predetermined color as the warning. .
- Such a leak gas detection device fills the range including the leak position obtained by the leak position processing unit with a predetermined color as the warning, so that the reliability is equal to or less than a threshold when the range is viewed. You can call attention to the user.
- the weather element is one or more of humidity, rainfall, wind speed, solar radiation, and temperature.
- the weather element measurement unit includes a hygrometer, and the reliability decreases as the humidity increases.
- the weather element measurement unit includes a rain gauge, and the reliability decreases as the rainfall increases.
- the weather element measurement unit includes an anemometer, and the reliability decreases as the wind speed increases.
- the weather element is a solar radiation amount
- the weather element measurement unit includes a solar radiation meter, and the reliability decreases as the solar radiation amount decreases.
- the meteorological element is air temperature
- the meteorological element measuring unit includes a thermometer, and as the difference between the background temperature of the gas cloud formed by the leaked gas and the air temperature decreases, the reliability is Get smaller.
- Such a leak gas detection device employs one or more of humidity, rainfall, wind speed, solar radiation, and temperature, which affect the reliability, as the meteorological element, so that the reliability can be appropriately evaluated.
- the leak gas detection method includes an image input step of acquiring an image of a target region, a weather element input step of acquiring data on a weather element, and an image of the target region acquired in the image input step.
- the degree of reliability with respect to the leak position obtained in the leak position processing step A reliability processing step for obtaining a reliability that is an index representing the above, and a display processing step for displaying the leakage position obtained in the leakage position processing step on a display unit in a range including the leakage position,
- the size of the range is changed according to the reliability obtained in the reliability processing step.
- Such a leak gas detection method displays the leak position obtained in the leak position processing step within a range including the leak position, and further changes the size of the range according to the reliability. For this reason, since the leak gas detection method displays the leak position in a range, the flicker can be reduced, and the reliability of the leak position including the degree of error can be displayed with the size of the range. Therefore, the user can more easily recognize the reliability of the leakage position including the degree of error by visual recognition of the size of the range, and whether to urgently go to the site according to the reliability. Appropriate decisions can be made.
- a leakage gas detection device and a leakage gas detection method can be provided.
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Abstract
Description
Claims (6)
- 対象領域の画像を取得する画像取得部と、
気象要素に関するデータを取得する気象要素取得部と、
前記画像取得部で取得した前記対象領域の画像に基づいて、空間に漏洩したガスの漏洩位置を求める漏洩位置処理部と、
前記気象要素取得部で取得した気象要素のデータに基づいて、前記漏洩位置処理部で求めた漏洩位置に対する信頼性の程度を表す指標である信頼度を求める信頼度処理部と、
前記漏洩位置処理部で求めた漏洩位置を、前記漏洩位置を含む範囲で表示部に対して表示可能とする表示処理部とを備え、
前記表示処理部は、前記信頼度処理部で求めた信頼度に応じて前記範囲の大きさを変更する、
漏洩ガス検出装置。 - 前記表示処理部は、前記信頼度処理部で求めた信頼度が低くなるに従って前記範囲の大きさが大きくなるように、前記範囲の大きさを変更する、
請求項1に記載の漏洩ガス検出装置。 - 前記信頼度処理部で求めた信頼度が所定の閾値以下である場合に、前記信頼度が前記閾値以下である旨の警告を行う警告処理部をさらに備える、
請求項1または請求項2に記載の漏洩ガス検出装置。 - 前記警告処理部は、前記警告として、前記漏洩位置処理部で求めた漏洩位置を含む前記範囲を前記表示処理部に所定の色で塗りつぶさせる、
請求項3に記載の漏洩ガス検出装置。 - 前記気象要素は、湿度、降雨量、風速、日射量および気温のうちの1または複数である、
請求項1ないし請求項4のいずれか1項に記載の漏洩ガス検出装置。 - 対象領域の画像を取得する画像入力工程と、
気象要素に関するデータを取得する気象要素入力工程と、
前記画像入力工程で取得した前記対象領域の画像に基づいて、空間に漏洩したガスの漏洩位置を求める漏洩位置処理工程と、
前記気象要素入力工程で取得した気象要素のデータに基づいて、前記漏洩位置処理工程で求めた漏洩位置に対する信頼性の程度を表す指標である信頼度を求める信頼度処理工程と、
前記漏洩位置処理工程で求めた漏洩位置を、前記漏洩位置を含む範囲で表示部に対して表示可能とする表示処理工程とを備え、
前記表示処理工程は、前記信頼度処理工程で求めた信頼度に応じて前記範囲の大きさを変更する、
漏洩ガス検出方法。
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