CN112924344A - Monitoring system and method for acquiring underground coal mine dust concentration based on image - Google Patents
Monitoring system and method for acquiring underground coal mine dust concentration based on image Download PDFInfo
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- CN112924344A CN112924344A CN202110087500.3A CN202110087500A CN112924344A CN 112924344 A CN112924344 A CN 112924344A CN 202110087500 A CN202110087500 A CN 202110087500A CN 112924344 A CN112924344 A CN 112924344A
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- 239000000428 dust Substances 0.000 title claims abstract description 46
- 239000003245 coal Substances 0.000 title claims abstract description 24
- 238000012544 monitoring process Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000001514 detection method Methods 0.000 claims abstract description 14
- 238000012545 processing Methods 0.000 claims abstract description 7
- 230000029058 respiratory gaseous exchange Effects 0.000 claims abstract description 6
- 238000005286 illumination Methods 0.000 claims description 11
- 238000012360 testing method Methods 0.000 claims description 9
- 238000003491 array Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000241 respiratory effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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- G01N15/075—
Abstract
The invention relates to a monitoring system and a monitoring method for acquiring underground coal mine dust concentration based on images, and belongs to the technical field of coal mines. The system comprises a walking track, a detection unit and a control unit; the detection unit and the control unit move along the walking track; the walking track is provided with a camera, an illuminometer, a hygrometer, a light source group, a data processing unit and a control unit. The data processing unit is connected with the control unit, and the control unit is respectively connected with the camera, the illuminometer, the hygrometer and the light source group; the walking track consists of two parallel tracks which are respectively arranged along two sides of the wall of the roadway; the camera is installed at the height of the breathing belt of the operator to acquire the dust concentration near the breathing belt of the operator. Compared with the traditional fixed-point monitoring of the concentration of the underground coal mine dust, the method can obtain the spatial distribution of the concentration of the underground coal mine particles, and lays a foundation for the global monitoring of the concentration of the underground coal mine dust.
Description
Technical Field
The invention belongs to the technical field of coal mines, and relates to a monitoring system and a monitoring method for acquiring underground coal mine dust concentration based on images.
Background
At the present stage, the main mode for acquiring the concentration of the underground dust is field sampling and weighing or the concentration of the dust is measured by a dust concentration detector and a dust concentration sensor, and the modes all adopt a fixed-point measurement mode, so that the defects of complicated detection process or poor reference of a monitoring result exist, the concentration of the dust at a certain point position of an underground operation place can be only acquired, the spatial distribution and the diffusion migration trend of the underground dust cannot be acquired, and more accurate dust fall and dust prevention suggestions and measures are difficult to provide for underground operation. The method for obtaining the underground dust concentration of the coal mine by using the image method is based on the characteristics of the image, and obtains the characteristic information in the image by using a certain method, so as to obtain the underground dust concentration information by mathematical calculation. The method has the advantages of intuition, non-contact, large detection range, easy deployment, easy construction and easy realization of the online analysis of the historical big data of the dust concentration.
Disclosure of Invention
In view of the above, the present invention provides a monitoring system and method for acquiring a coal mine underground dust concentration based on an image.
In order to achieve the purpose, the invention provides the following technical scheme:
a monitoring system for acquiring underground coal mine dust concentration based on images comprises a walking track, a detection unit and a control unit;
the detection unit and the control unit move along the walking track;
the walking track is provided with a camera, an illuminometer, a hygrometer, a light source group, a data processing unit and a control unit.
The data processing unit is connected with the control unit, and the control unit is respectively connected with the camera, the illuminometer, the hygrometer and the light source group;
the walking track consists of two parallel tracks which are respectively arranged along two sides of the wall of the roadway;
the camera is installed at the height of the breathing belt of the operator to acquire the dust concentration near the breathing belt of the operator.
Optionally, the camera is a color camera, and a lens of the camera is wrapped by a lens gas sheath cover;
the lens gas sheath cover is in a hollow circular ring shape, and clean protective gas filtered by the sheath gas filter is blown to the shooting direction of the camera along the hollow circular lens gas sheath cover.
Optionally, the illuminometer and the hygrometer are arranged on the same side of the camera and move along with the camera to respectively obtain the illuminance and humidity of the environment so as to compensate the measured dust concentration result.
Optionally, the light source group is an LED lamp array, and is disposed in the mounting groove of the light source group box, and light rays pass through a light-transmitting cover of the camera and enter the camera along a light-transmitting hole of the LED lamp array;
the light holes are n cylindrical circular hole arrays with the same size, and the illuminance of each circular hole is uniform.
Optionally, the light source group case is equipped with the purification compressor interface, and compressed gas and camera lens gas sheath cover sharing, compressed gas get into the space between the printing opacity lamp shade of light source group case and the light trap, bulge along the light trap, keep the light trap export to be the malleation state, prevent that dusty air current from getting into the light source group case and causing the pollution of light source group.
Optionally, when the camera and the light source group move on the two walking tracks respectively, the magnitude of the movement displacement is set according to the requirement of the measurement frequency, but the light source group after each movement is in the field of view of the camera.
The method for monitoring the underground coal mine dust concentration based on the system comprises the following steps: the method comprises the steps of obtaining an environment humidity value and an illumination value, starting a lens to protect an air circuit, starting a light source group, focusing a camera, photographing by the camera to test the concentration of a first test point, closing the light source group, moving to a next test point, and repeating the steps.
Optionally, the concentration calculation method includes: denoising the acquired spot image background, identifying the bright and dark areas of the edges of n light holes, extracting the edges of the image, calculating the mean value of the gray images of the n light holes, calculating the sum of the absolute values of the Laplacian values of each pixel point in the gray images, and comparing the sum with a set threshold value to judge whether shielding exists or not; if the shielding exists, the image is repeatedly acquired, and if the shielding does not exist, the image is compared with the gray level-dust concentration curve under different humidity and illumination, and the dust concentration is calculated.
The invention has the beneficial effects that:
1. compared with the traditional fixed-point monitoring of the concentration of the underground coal mine dust, the method can obtain the spatial distribution of the concentration of the underground coal mine particles, and lays a foundation for the global monitoring of the concentration of the underground coal mine dust;
2. compared with a dust measuring mode such as laser, the cost is lower, and automation is easier to realize;
3. the pollution of the lens is effectively reduced, the maintenance period is prolonged or the maintenance-free is realized;
4. whether the lens is shielded or not is judged through the image gray information, so that the hardware cost is reduced;
5. the light of the light source group is matched with the light-transmitting lampshade and enters the camera through the cylindrical round hole, so that the light is ensured to be uniform, and the reflection can be reduced;
6. through humidity and illumination compensation, the influence of environmental water mist and underground illumination on detection precision is reduced.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a system composition diagram;
FIG. 2 is a view showing the structure of a lens sheath cover;
fig. 3 is a diagram of a light source group structure.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1 to 3, a monitoring system for acquiring a coal mine underground dust concentration based on an image includes a detection system walking track, a detection unit and a control unit, wherein the detection unit and the control unit are arranged on the walking track and can move along the track. An optical detection camera, an ambient illumination and humidity detection device, a light source group, a data processing unit and a control unit are arranged on the traveling track.
The walking track comprises two sets of parallel tracks, arranges along tunnel group wall both sides, and camera and light source group on the walking track can install in operation personnel respiratory zone height to acquire the near dust concentration of operation personnel respiratory zone.
The camera is a color camera, and the lens of the camera is protected by a lens gas sheath cover so as to prevent the lens from being polluted;
the lens gas sheath cover is in a hollow circular ring shape, and clean protective gas filtered by the sheath gas filter is blown to the shooting direction of the camera along the circular gas sheath cover.
The illuminometer and the hygrometer are arranged on the same side of the camera and can move along with the camera simultaneously to acquire the illumination and humidity of the environment and compensate the measured dust concentration result.
The light source group can be LED lamp array, arranges in the mounting groove of light source group case, and light can pass through the light-transmitting lamp shade and follow array light trap entering camera. The light holes are n cylindrical circular hole arrays with the same size, and the illuminance of each circular hole is uniform.
The light source group case is equipped with the purification compressor interface, and compressed gas can with camera lens gas sheath cover sharing, and in the compressed gas got into the space between light source group case printing opacity lamp shade and the light trap, bloated along the light trap, keep the light trap export to be the malleation state, prevent that dusty air current from getting into light source group case and causing light source group to pollute.
When the camera and the light source group respectively move on the two tracks, the moving displacement is determined according to the measurement frequency requirement every time, but the light source group after moving every time needs the field of view of the camera.
The concentration measuring method comprises the following steps: the dust concentration measuring process comprises the steps of starting, preheating a system, preheating (obtaining environment humidity and illumination value, starting a lens to protect an air path and the like), starting a light source group, focusing, photographing and testing the concentration of a first test point (a concentration calculating method comprises the steps of denoising a collected light spot image background, identifying bright and dark areas at the edges of n light holes, extracting image edges, calculating the mean value of n light hole gray level images, calculating the sum of absolute values of Laplace values of each pixel point in the gray level image, comparing the sum with a set threshold value to determine whether shielding exists, repeating the shielding exists, comparing with gray level-dust concentration curves under different humidity and environment illumination to calculate dust concentration if the shielding does not exist, closing the light source group, moving to the next test point, preheating and repeating the steps.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (8)
1. The utility model provides a monitoring system based on colliery is dust concentration in pit of image acquisition which characterized in that: comprises a walking track, a detection unit and a control unit;
the detection unit and the control unit move along the walking track;
the walking track is provided with a camera, an illuminometer, a hygrometer, a light source group, a data processing unit and a control unit;
the data processing unit is connected with the control unit, and the control unit is respectively connected with the camera, the illuminometer, the hygrometer and the light source group;
the walking track consists of two parallel tracks which are respectively arranged along two sides of the wall of the roadway;
the camera is installed at the height of the breathing belt of the operator to acquire the dust concentration near the breathing belt of the operator.
2. The monitoring system for acquiring the underground coal mine dust concentration based on the image as claimed in claim 1, wherein: the camera is a color camera, and a lens of the camera is wrapped with a lens gas sheath cover;
the lens gas sheath cover is in a hollow circular ring shape, and clean protective gas filtered by the sheath gas filter is blown to the shooting direction of the camera along the hollow circular lens gas sheath cover.
3. The monitoring system for acquiring the underground coal mine dust concentration based on the image as claimed in claim 1, wherein: the illuminometer and the hygrometer are arranged on the same side of the camera and move along with the camera to respectively acquire the illumination and the humidity of the environment so as to compensate the measured dust concentration result.
4. The monitoring system for acquiring the underground coal mine dust concentration based on the image as claimed in claim 1, wherein: the light source group is an LED lamp array and is arranged in the mounting groove of the light source group box, and light rays penetrate through a light-transmitting lamp shade of the camera and enter the camera along a light-transmitting hole of the LED lamp array;
the light holes are n cylindrical circular hole arrays with the same size, and the illuminance of each circular hole is uniform.
5. The monitoring system for acquiring the underground coal mine dust concentration based on the image as claimed in claim 4, wherein: the light source group case is equipped with the purification compressor interface, and compressed gas and camera lens gas sheath cover sharing, compressed gas get into the space between the printing opacity lamp shade of light source group case and the light trap, bulge along the light trap, keep the light trap export to be the malleation state, prevent that dusty air current from getting into light source group case and causing light source group to pollute.
6. The monitoring system for acquiring the underground coal mine dust concentration based on the image as claimed in claim 1, wherein: when the camera and the light source group move on the two walking tracks respectively, the moving displacement is set according to the requirement of the measuring frequency, but the light source group after each moving is in the view field of the camera.
7. The method for monitoring the concentration of underground coal mine dust based on the system of any one of claims 1 to 6 is characterized by comprising the following steps: the method comprises the following steps: the method comprises the steps of obtaining an environment humidity value and an illumination value, starting a lens to protect an air circuit, starting a light source group, focusing a camera, photographing by the camera to test the concentration of a first test point, closing the light source group, moving to a next test point, and repeating the steps.
8. The method for monitoring the underground coal mine dust concentration based on the image acquisition as claimed in claim 7, wherein the method comprises the following steps: the concentration calculation method comprises the following steps: denoising the acquired spot image background, identifying the bright and dark areas of the edges of n light holes, extracting the edges of the image, calculating the mean value of the gray images of the n light holes, calculating the sum of the absolute values of the Laplacian values of each pixel point in the gray images, and comparing the sum with a set threshold value to judge whether shielding exists or not; if the shielding exists, the image is repeatedly acquired, and if the shielding does not exist, the image is compared with the gray level-dust concentration curve under different humidity and illumination, and the dust concentration is calculated.
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| CN202110087500.3A CN112924344A (en) | 2021-01-22 | 2021-01-22 | Monitoring system and method for acquiring underground coal mine dust concentration based on image |
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| CN202110087500.3A CN112924344A (en) | 2021-01-22 | 2021-01-22 | Monitoring system and method for acquiring underground coal mine dust concentration based on image |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113899667A (en) * | 2021-09-25 | 2022-01-07 | 杭州谱育科技发展有限公司 | Navigation type particulate matter detection system and method |
| CN114159047A (en) * | 2021-12-03 | 2022-03-11 | 深圳市海文生物科技有限公司 | Detection mechanism and method for dynamically identifying respiratory state |
| CN114577691A (en) * | 2022-03-15 | 2022-06-03 | 中科海慧（北京）科技有限公司 | Coal mine dust monitoring and simulation verification method |
| CN115831830A (en) * | 2023-02-23 | 2023-03-21 | 泓浒(苏州)半导体科技有限公司 | Environment detection early warning system for semiconductor wafer transmission |
| CN116147522A (en) * | 2023-04-24 | 2023-05-23 | 四川省公路规划勘察设计研究院有限公司 | Automatic monitoring system for tunnel substrate deformation |
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