WO2018038149A1 - Gas detection information display system and gas detection information display program - Google Patents

Abstract

In order to quickly and clearly display gas detection position detected by a gas detection device to on-site personnel searching for the gas detection position, this gas detection information display system acquires, from a gas detection device (11), gas detection information corresponding to the position of gas in a gas detection space and controls display of the gas detection position information on a portable display device (22). This system is provided with a gas position specifying means which specifies a gas detection position in the gas detection space on the basis of the gas detection information, a visual field specifying means which specifies the visual field of an imaging device at the time of imaging a captured image (24) in the gas detection space, and a display control means which, on a display device, displays a gas detection position (25), specified by the gas position specifying means in said visual field, superimposed on the captured image through positioning within the same visual field.

Description

Gas detection information display system and gas detection information display program

The present invention relates to a gas detection information display system and a gas detection information display program.

In recent years, aging of gas facilities and gas leaks at mining sites have become environmental problems, and monitoring of gas leaks, detection of gas in the event of a gas leak, and grasping of gas concentration distribution are required.
As a method for detecting gas in space, one-point measurement using a laser beam is known. This method emits laser light of the wavelength of the target gas absorption band and non-absorption band from the gas measurement device, passes it through the same space, reflects it to any reflective object such as a wall, and returns it to the gas measurement device. By detecting the intensity ratio, gas detection is performed. This is because if the target gas is present on the optical path of the laser light, the intensity ratio of the absorption band to the non-absorption band decreases.
Conventionally, a method of measuring a gas concentration two-dimensionally using an infrared laser is known. For example, Patent Document 1 relates to a device including laser transmission and reflected light receiving means, means for detecting light absorption information by gas from received intensity, and means for displaying absorption information in a visible state. Further, Patent Document 2 relates to an apparatus that includes a mirror scanning unit and performs measurement by moving a measurement area two-dimensionally.

Japanese Patent Laid-Open No. 4-295538 Japanese Unexamined Patent Publication No. 2000-346796

By the way, when a gas leak or the like occurs and the gas detection device detects the gas, it is desirable to promptly and clearly notify the person who deals with the gas detection position.
However, it would take a relatively long time to confirm the gas detection position by simply informing the personnel who handle the site of information identifying the individual gas detection device that detected the gas, or other gas detection devices. There is a risk of mistakes.
In addition, when a gas is detected by a gas detection infrared camera or a gas detection device that monitors a wide area by a technique such as two-dimensional scanning with laser light as described above, even if information that identifies an individual of the gas detection device is notified, It is impossible to grasp at which position in the monitoring area of the gas detection device the gas is detected. Even if the gas detection information by the gas detection device is displayed by the gas distribution seen from the viewpoint of the gas detection device or other fixed viewpoints, the self-viewpoint for the personnel who move on the spot and confirm the gas detection position And the gas detection position can be difficult to grasp.

The present invention has been made in view of the above problems in the prior art, and it is an object to promptly and clearly display the gas detection position detected by the gas detection device to the on-site personnel searching for the gas detection position. And

The invention according to claim 1 for solving the above-mentioned problem obtains the gas detection information corresponding to the gas position in the gas detection target space from the gas detection device, and acquires the captured image from the portable imaging device. A gas detection information display system for controlling the display of gas detection position information on a portable display device,
Gas position specifying means for specifying a gas detection position in the gas detection target space based on the gas detection information;
Visual field specifying means for specifying the visual field of the imaging device when the captured image is captured in the gas detection target space;
A gas detection information display system comprising: display control means for displaying the gas detection position specified by the gas position specification means that falls within the field of view on the display device in a superimposed manner on the captured image by positioning within the field of view. It is.

The invention according to claim 2 comprises image feature point extraction means for extracting feature points from the captured image,
The field-of-view specifying unit is configured to capture the captured image in the gas detection target space based on the feature points extracted by the image feature point extraction unit and the facility information in the gas detection target space. It is a gas detection information display system of Claim 1 which specifies the visual field of an imaging device.

The invention according to claim 3 comprises a position and orientation detection means for detecting the position and orientation of the imaging device,
The field-of-view specifying unit is configured to capture the captured image in the gas detection target space based on the position and orientation of the imaging device detected by the position and orientation detection unit when the captured image is captured. It is a gas detection information display system of Claim 1 which specifies a visual field.

The invention according to claim 4 acquires the gas detection information corresponding to the gas position in the gas detection target space from the gas detection device, acquires the captured image from the portable imaging device, and supplies the gas to the portable display device. In a gas detection information display system that controls display of detection position information,
Computer
Gas position specifying means for specifying a gas detection position in the gas detection target space based on the gas detection information;
Visual field specifying means for specifying the visual field of the imaging device when the captured image is captured in the gas detection target space;
Gas detection information display for functioning as display control means for displaying on the display device the gas detection position specified by the gas position specifying means entering the field of view superimposed on the captured image by positioning in the field of view It is a program.

The invention according to claim 5 is the gas detection information display program according to claim 4 for causing a computer to function as an image feature point extraction means for extracting a feature point from the captured image.
The field-of-view specifying unit is configured to capture the captured image in the gas detection target space based on the feature points extracted by the image feature point extraction unit and the facility information in the gas detection target space. It is a gas detection information display program for specifying the field of view of the imaging apparatus.

The invention according to claim 6 is provided with a position and orientation detection means for the gas detection information display system to detect the position and orientation of the imaging device,
The field-of-view specifying unit is configured to capture the captured image in the gas detection target space based on the position and orientation of the imaging device detected by the position and orientation detection unit when the captured image is captured. The gas detection information display program according to claim 4, wherein the visual field is specified.

According to the present invention, the gas detection position detected by the gas detection device can be displayed quickly and clearly to the on-site personnel searching for the gas detection position.

1 is a configuration block diagram of a gas detection information display system according to an embodiment of the present invention. It is a schematic diagram which shows the state of the gas detection by the gas detection information display system which concerns on one Embodiment of this invention, and a report. It is a mimetic diagram showing the field and the field staff. It is a schematic diagram which shows the terminal which displays an image feature point. It is a schematic diagram which shows the terminal which displays a gas detection position. It is a flowchart which shows the outline | summary of the process from the gas detection by the gas detection information display system which concerns on one Embodiment of this invention to the recording of a gas detection position. It is a schematic diagram which shows the specific form of the gas detection position by the gas detection information display system which concerns on one Embodiment of this invention. It is a schematic diagram which shows the other form of specification of the gas detection position by the gas detection information display system which concerns on one Embodiment of this invention. It is a flowchart which shows the outline | summary of the process from the on-site image acquisition by the gas detection information display system which concerns on one Embodiment of this invention to the superimposition display of the gas detection position to the image. It is a schematic diagram which shows the example of arrangement | positioning in the virtual space calculated by the gas detection information display system which concerns on one Embodiment of this invention, the visual field of a gas detection apparatus, and the visual field of an imaging device.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

As shown in FIG. 1, the gas detection information display system 10 includes a gas detection device 11, a central control unit 12, a database (storage device) 13, and a portable terminal (tablet computer) 20. The central control unit 12 and the terminal 20 include a CPU (1A, 2A) that is the center of a computer, a ROM (1B, 2B) and a RAM (1C, 2C) as storage devices for programs and data, and a communication interface (1D). 2D) etc. to communicate with each other. The CPU 1A of the central control unit 12 and / or the CPU 2A of the terminal 20 function as gas position specifying means, visual field specifying means, display control means, and image feature point extracting means by executing the gas detection information display program.
The terminal 20 includes an imaging device 21, a display device 22, and a position / orientation detection device 23.

As the gas detection device 11, a gas detection infrared camera or a laser beam scanning gas detection device installed at a distance from the gas detection target space can be applied, and a large number of gas detection devices 11 are arranged in the gas detection target space. A fixed gas detection sensor group can be applied.
In the case of the laser beam scanning method, the gas measurement method is as follows: the laser beam of the target gas absorption band and non-absorption band wavelength is emitted from the gas detection device (projecting unit) and passed through the same space, and the background of the wall It is possible to apply a method of reflecting the object and returning it to the gas detection device (light receiving unit), and calculating the concentration thickness product by taking the intensity ratio of the received light amount of the absorption band and the non-absorption band based on the light reception signal. As a scanning method, a two-dimensional scanning method is applied so that a two-dimensional gas distribution can be detected.
When an infrared camera for gas detection is applied, since it is obtained by two-dimensional infrared thermography, a two-dimensional distribution of gas is detected.
In the case of fixed gas detection sensor groups, the gas detection position is fixed depending on which gas detection sensor detects the gas, which is distributed in the vertical, horizontal, and height directions in the equipment in the gas detection target space. Can be specified with accuracy.
This system utilizes the system configuration as described above, and as shown in FIG. 2A, the gas detection target space including the equipment 31 is monitored by the gas detection device 11, and this is detected when the gas detection device 11 detects gas. 2D, to promptly and clearly display the gas detection position 25 in the captured image 24 as shown in FIG. 2D for the on-site personnel 32 who goes to the site and searches for the gas detection position as shown in FIG. 2B It is.

As shown in FIG. 3, when the gas detection device 11 detects a gas, the CPU 1A acquires gas detection information corresponding to the gas position in the gas detection target space from the gas detection device 11 (S1). (At this time, the above-mentioned alarm is issued.) In the case of an infrared camera for gas detection or a laser beam scanning gas detection device, this gas detection information is a two-dimensional gas detection position (see FIG. (Two-dimensional coordinates). The CPU 1A refers to the database 13 and specifies the gas detection position 41 in the gas detection target space based on the gas detection information (S2). In the database 13, virtual space information (for example, three-dimensional model data of the equipment, a large number of images of the equipment as subjects) that defines the arrangement of the equipment 31 with respect to the field of view 11 a of the gas detection device 11 is the position corresponding to the portion to be imaged. The CPU 1A refers to this, and the CPU 1A distributes the gas detection positions 41 corresponding to the two-dimensional coordinates 11c where the gas is detected in the virtual space within the space range or the same space range. Identify as a group (FIG. 4A). The surface 11b is a cross section perpendicular to the central axis of the visual field 11a.
When the gas detection device 11 is a fixed gas detection sensor group, the address information of each individual gas detection sensor is stored in the database 13, and the CPU 1A acquires the identification information of the individual that detected the gas. To identify the gas detection position 42 (FIG. 4B).
The specified gas detection position (41 or 42) is recorded in the database 13 (S3).

Next, when the surrounding equipment is imaged by the imaging device 21 and the gas position display request is input at the terminal 20 carried and operated by the site personnel 32 who search for the gas detection position toward the site, the CPU 2A displays the captured image. 24 (FIG. 5, S11), the CPU 2A (or the CPU 1A to which the captured image 24 is transferred from the terminal 20) functions as an image feature point extracting unit, and the feature point (for example, the feature of FIG. 2C) from the captured image 24. Points 24a, 24b, and 24c) are extracted (S12).
The CPU 2A (or CPU 1A) functions as a visual field specifying unit, and performs a matching determination of feature points based on the feature points extracted by the image feature point extraction unit and the facility information in the gas detection target space, thereby detecting the gas detection target. The visual field 21a (FIG. 6) of the imaging device when the captured image in the space is captured is specified. This equipment information refers to a part related to equipment in the virtual space information described above.
The CPU 2A (or CPU 1A) acquires the gas detection position (41 or 42) stored in the database 13 in step S3 (S14). When the CPU 1A processes steps S12 to S14, the specific information of the visual field 21a and the gas detection position are transferred to the terminal 20.
The CPU 2A functions as display control means, and the gas detection position (41 or 42) specified by the gas position specifying means entering the visual field 21a is superimposed on the captured image 24 by positioning in the visual field 21a and is displayed on the display device 22. Display (S15, FIG. 2D). The gas detection position 25 in FIG. 2D is based on the positioning (apparent) of the gas detection position 41 in the visual field 21a.

As described above, the gas detection position 25 is displayed by being positioned in the visual field 21a at the time of imaging the image by being superimposed on the image captured by the imaging device 21 of the terminal 20 and displayed on the display device 22. The gas detection position detected by the gas detection device 11 can be displayed quickly and clearly to the on-site personnel 32 searching for the gas detection position.

Identification of the visual field 21a of the imaging device 21 when the captured image is captured may be performed based on the position and orientation of the imaging device 21 detected by the position and orientation detection device 23, instead of the method described above. The position / orientation detection device 23 includes an orientation sensor such as a positioning means such as GPS, a gyro sensor, and an acceleration sensor, and detects the position and orientation of the imaging device 21. Accordingly, when the tablet computer including the display device 22 and the imaging device (camera) 21 are separate, the imaging device (camera) 21 is provided with the position / orientation detection device 23.
The CPU 2A (or the CPU 1A capable of acquiring information via the terminal 20) acquires information on the position and orientation of the imaging device 21 from the position / orientation detection device 23. When the imaging device 21 has a zoom function, the imaging device 21 is obtained, or when the viewing angle is fixed, the viewing angle is stored in the ROM (2B or 1B), and based on the information, the field of view 21a is shown in FIG. The gas detection position (41) is defined on the defined virtual space, and thereafter, the superimposition display of the gas detection position 25 on the captured image 24 by the positioning in the same visual field 21a is executed.

The present invention can be used to display a gas detection position.

DESCRIPTION OF SYMBOLS 10 Gas detection information display system 11 Gas detection apparatus 11a Gas detection apparatus visual field 12 Central control part 13 Database 20 Terminal 21 Imaging apparatus 21a Imaging apparatus visual field 22 Display apparatus 23 Position and orientation detection apparatus 24 Captured image 24a, 24b, 24c 25 Gas detection position 31 Equipment 32 On-site personnel 41 Gas detection position 42 Gas detection position

Claims (6)

Gas that acquires gas detection information corresponding to the gas position in the gas detection target space from the gas detection device, acquires a captured image from the portable imaging device, and controls display of the gas detection position information on the portable display device A detection information display system,
Gas position specifying means for specifying a gas detection position in the gas detection target space based on the gas detection information;
Visual field specifying means for specifying the visual field of the imaging device when the captured image is captured in the gas detection target space;
A gas detection information display system comprising: display control means for displaying the gas detection position specified by the gas position specification means that falls within the field of view on the display device in a superimposed manner on the captured image by positioning within the field of view. . Image feature point extracting means for extracting feature points from the captured image;
The field-of-view specifying unit is configured to capture the captured image in the gas detection target space based on the feature points extracted by the image feature point extraction unit and the facility information in the gas detection target space. The gas detection information display system according to claim 1, wherein the field of view of the imaging device is specified. Position and orientation detection means for detecting the position and orientation of the imaging device,
The field-of-view specifying unit is configured to capture the captured image in the gas detection target space based on the position and orientation of the imaging device detected by the position and orientation detection unit when the captured image is captured. The gas detection information display system according to claim 1, wherein a field of view is specified. Gas that acquires gas detection information corresponding to the gas position in the gas detection target space from the gas detection device, acquires a captured image from the portable imaging device, and controls display of the gas detection position information on the portable display device In the detection information display system,
Computer
Gas position specifying means for specifying a gas detection position in the gas detection target space based on the gas detection information;
Visual field specifying means for specifying the visual field of the imaging device when the captured image is captured in the gas detection target space;
Gas detection information display for functioning as display control means for displaying on the display device the gas detection position specified by the gas position specifying means entering the field of view superimposed on the captured image by positioning in the field of view program. The gas detection information display program according to claim 4 for causing a computer to function as an image feature point extraction unit that extracts a feature point from the captured image.
The field-of-view specifying unit is configured to capture the captured image in the gas detection target space based on the feature points extracted by the image feature point extraction unit and the facility information in the gas detection target space. A gas detection information display program for specifying the field of view of an imaging apparatus. The gas detection information display system includes position and orientation detection means for detecting the position and orientation of the imaging device,
The field-of-view specifying unit is configured to capture the captured image in the gas detection target space based on the position and orientation of the imaging device detected by the position and orientation detection unit when the captured image is captured. The gas detection information display program according to claim 4 which specifies a visual field.

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