CN217278938U - Area array laser radar-based slag falling real-time detection system - Google Patents
Area array laser radar-based slag falling real-time detection system Download PDFInfo
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- CN217278938U CN217278938U CN202122974597.8U CN202122974597U CN217278938U CN 217278938 U CN217278938 U CN 217278938U CN 202122974597 U CN202122974597 U CN 202122974597U CN 217278938 U CN217278938 U CN 217278938U
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Abstract
The utility model discloses a sediment real-time detection system falls based on area array laser radar, this system includes: the area array laser radar is over against a falling channel of the falling slag in the furnace and is used for recording a falling track video of the falling slag in the furnace through an observation hole of the pulverized coal furnace; the data line is used for connecting the area array laser radar and the data terminal so as to transmit the video acquired by the area array laser radar to the data terminal; and the data terminal is used for receiving video information acquired by the area array laser radar transmitted by the data line and guiding the pulverized coal furnace to optimize the running state according to the falling frequency and size of the falling slag through the falling slag real-time detection subsystem. The system can monitor the condition of the slag falling in the pulverized coal furnace in real time, provides stronger basis for combustion and control in the pulverized coal furnace, and reduces the potential safety hazard of equipment caused by the falling of the large slag, thereby improving the safety and reliability of the pulverized coal furnace and realizing clean and efficient utilization of a power plant of a domestic pulverized coal furnace.
Description
Technical Field
The utility model relates to a pulverized coal furnace burns technical field, and specifically speaking relates to a sediment real-time detection system falls based on area array laser radar.
Background
The pulverized coal furnace is a boiler device taking pulverized coal as fuel. It has the advantages of rapid and complete combustion, large capacity, high efficiency, wide coal adaptation range, convenient control and regulation, etc. The combustion characteristic of the pulverized coal furnace is that fuel enters the combustion chamber together with air and is combusted in a suspension state.
Slagging on a water-cooled wall and a screen of a hearth of the pulverized coal fired boiler is a common phenomenon, and meanwhile slagging in the boiler can reduce the heat transfer capacity of a heating surface, so that the smoke temperature at the outlet of the hearth is increased, and the boiler efficiency is reduced. When the slagging is serious, the falling of large slag blocks can damage the water-cooled wall of the furnace bottom or block a slag discharge port, so that the fire extinguishing and the furnace shutdown of the boiler are caused, and even safety accidents occur.
The slag falling after slagging in the pulverized coal furnace can cause serious influence on equipment, and the accurate slag block size and slag falling position are obtained, so that the method has important significance for controlling combustion in the furnace and reducing potential safety hazards. In general, a domestic detection system for slagging and slag falling utilizes a heat flow meter arranged on a water-cooled wall to monitor and diagnose heat flow change caused by slagging or adopts infrared imagers arranged at different positions to measure radiation emissivity on the surface of the water-cooled wall so as to directly reflect slagging conditions of the wall surface, but the system has the defects of large error, harsh application conditions, more limiting conditions and the like. The existing system can only obtain the tendency of furnace slagging, and can not obtain key information such as the position, the size and the like of real-time slagging, and field operators often judge the position and the size of the slagging only according to operation experience, so that a system capable of effectively detecting the position and the size of the slagging in real time is lacked in the research at the present stage.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a sediment real-time detection system falls based on area array laser radar solves the unable real-time detection's of sediment image and the unable real-time detection of buggy stove sediment that falls of catching of ordinary industry camera among the prior art problem.
In order to realize the purpose, the utility model discloses a following technical scheme realizes:
a real-time slag detection system based on area array laser radar comprises:
the area array laser radar is over against a falling channel of the falling slag in the furnace and is used for recording a falling track video of the falling slag in the furnace through an observation hole of the pulverized coal furnace;
the data line is used for connecting the area array laser radar and the data terminal so as to transmit the video acquired by the area array laser radar to the data terminal;
and the data terminal is used for receiving video information acquired by the area array laser radar transmitted by the data line and guiding the pulverized coal furnace to optimize the running state according to the falling frequency and size of the falling slag through the falling slag real-time detection subsystem.
In the above technical solution, further, the fallen slag real-time detection subsystem includes: the device comprises an image acquisition module, a gray level processing module, a binarization processing module, a slag falling frequency calculation module, a connected domain size calculation module and an alarm module;
the image acquisition module is used for extracting one frame of slag falling image per second from the falling track video of the falling slag; the gray processing module is connected with the image acquisition module and is used for carrying out gray processing on the acquired slag falling image to obtain a gray image; the binarization processing module is connected with the gray level processing module and is used for carrying out binarization processing on the gray level image to obtain a binarization image; the slag falling frequency calculation module is connected with the binarization processing module and is used for counting the number of connected domains in the binarization image so as to obtain the number of the slag falling in the image and calculate the slag falling frequency; the connected domain size calculation module is connected with the binarization processing module and is used for calculating the size of each connected domain in the binarization image; the alarm module is connected with the connected domain size calculation module and the slag falling frequency calculation module and is used for sending out a safety command when the size of the connected domain and the slag falling frequency exceed safety thresholds.
Furthermore, an observation window is arranged on the pulverized coal furnace, an area array laser radar is used for collecting a falling slag falling channel video, and the image acquisition module extracts the falling slag image from the video. As a large amount of unburnt flame exists at the falling part of the pulverized coal furnace slag, a common industrial camera cannot capture the falling image of the falling slag, and therefore, an area array laser radar is selected to penetrate the flame to capture the falling track of the falling slag.
Furthermore, in the binarized image obtained by the processing of the binarizing processing module, the color difference between the fallen slag and the shooting background makes a plurality of connected domains representing the fallen slag appear on the binarized image. The threshold value set by the binarization processing module when the image is changed from the gray map to the binarized image is 80.
Furthermore, in the slag falling frequency calculation module, the number of connected components of a certain frame of image is counted as N, and the slag falling frequency η is equal to N/1, and the unit of the slag falling frequency η is HZ.
Further, the connected domain size calculating module is used for calculating the size of the connected domain, and the size S of the connected domain n The method is obtained by counting the sum of pixel points in a connected domain, wherein n is 1,2,3 … k.
Further, the safety communication domain threshold value of the slag falling size is S sa When S is n ＞S sa And the alarm module sends out a slag falling and falling danger instruction. The safety threshold of the slag falling frequency is 1/40, and when the slag falling frequency exceeds the safety threshold, the alarm module can also send out a slag falling danger instruction.
The utility model provides a slag real-time detection system that falls based on area array laser radar carries out real-time detection through the slag size and the frequency that fall of area array laser radar in to pulverized coal furnace, optimizes the combustion control of pulverized coal furnace in real time and reduces the potential safety hazard of pulverized coal furnace to improve the high efficiency and the safety of pulverized coal furnace burning.
Compared with the prior art, the utility model discloses an useful part lies in:
the utility model discloses a slag real-time detection system that falls based on area array laser radar through the size and the quantity that each frame image of real-time acquisition falls the slag intercommunication territory, finally obtains the size and the frequency of dropping of the buggy stove slag that falls. Because a large amount of flames exist at the falling part of the pulverized coal furnace slag, a common industrial camera cannot capture a slag falling image, and the area array laser radar can be used for penetrating the flames to capture a falling track of the slag falling. The falling slag real-time detection system based on the area array laser radar is judged according to the monitoring picture in the furnace compared with field operation personnel, has real-time performance and accuracy, can efficiently and accurately calculate the falling slag frequency and send out a danger prompt that the falling slag falls greatly, can realize the monitoring of stable combustion of the pulverized coal furnace, and enables the combustion of the pulverized coal furnace to be more efficient, clean, safe and reliable.
Drawings
FIG. 1 is a schematic view of an embodiment of the present invention illustrating an area array laser radar installed on a pulverized coal furnace;
fig. 2 is the embodiment of the utility model provides an in the embodiment based on area array laser radar's the sediment real-time detection system's that falls detection flow chart.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further explained with reference to the following embodiments and accompanying drawings. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived by a person skilled in the art from the described embodiments without any inventive step, are within the scope of the present invention.
Examples
Referring to fig. 1, the pulverized coal furnace of the present embodiment includes: the device comprises a pulverized coal furnace hearth 1, an industrial personal computer 7, a data line 6, an area array laser radar 5, a slag falling channel 2 and a slag leaking hopper 3. The slag falling in the pulverized coal furnace hearth 1 falls into a slag bucket 3 through a slag falling channel 2, and an area array laser radar 5 is installed in the middle of the slag falling channel 2. The fallen slag falling video captured by the area array laser radar 5 is input into an industrial personal computer 7 containing a fallen slag real-time detection subsystem through a data line 6, and the final fallen slag frequency and the fallen slag size are obtained. The falling slag 4 is finally accumulated in the slag hopper 3 through the slag falling passage 2.
Referring to fig. 2, when the slag falling real-time detection subsystem is called, the following steps are executed:
step S100: and acquiring a frame of slag falling image captured by the area array solid-state laser radar sensor every second.
Step S200: and converting the corresponding BGR three-channel flame image into a single-channel grey-scale image.
Step S300: the grayscale image obtained in step S200 is subjected to a binarization method to obtain a binarized image having only pixel values of 0 and 255.
Step S400: and (5) counting the total number N of the connected domains of the binary image of the image obtained in the step (300), obtaining the number of the slag falling in the image, and calculating the slag falling frequency eta to be N/1 (HZ).
Step S500: counting the sum S of pixel points in a connected domain n And obtaining the size of each connected domain, wherein n is 1,2,3 … k.
Step S600: the threshold value of a safe connected domain for detecting the size of the falling slag is S sa When it comes toS n ＞S sa And when the system is in use, the system sends out a dangerous command of falling slag and falling. The safety threshold for detecting the slag falling frequency is 1/40, and when the slag falling frequency eta is more than 1/40, the system also sends out a slag falling danger instruction.
In summary, in this embodiment, the image information of the pulverized coal furnace slag falling is obtained by using the area array laser radar, and based on one frame of real-time slag falling image obtained every 1s, the size and the falling frequency of the slag in the pulverized coal furnace are finally obtained through a series of image processing methods such as size and number statistics of the connected domain, and a danger prompt when the large slag falling occurs can be obtained. Finally, the utility model provides a buggy stove power plant can't obtain the size and the frequency scheduling problem of the interior sediment that falls of stove in real time, can monitor the condition of the interior sediment that falls of buggy stove in real time, for the burning provides stronger foundation with control in the buggy stove, has reduced the big sediment that falls and has dropped the potential safety hazard to equipment to the fail safe nature of buggy stove has been promoted and the clean high-efficient utilization of realization life buggy stove power plant has been promoted. Compared with the manual experience, the system for estimating the circulation multiplying power has the advantages of high efficiency, rapidness, accuracy, real-time updating and the like, and can realize the real-time monitoring of the slag falling of the pulverized coal furnace.
Claims (5)
1. The utility model provides a sediment real-time detection system that falls based on area array laser radar which characterized in that includes:
the area array laser radar is over against a falling channel of the falling slag in the furnace and is used for recording a falling track video of the falling slag in the furnace through an observation hole of the pulverized coal furnace;
the data line is used for connecting the area array laser radar and the data terminal so as to transmit the video acquired by the area array laser radar to the data terminal;
the data terminal is used for receiving video information acquired by the area array laser radar transmitted by the data line and guiding the pulverized coal furnace to optimize the running state according to the falling frequency and the falling size of the falling slag through the falling slag real-time detection subsystem;
the falling slag real-time detection subsystem comprises: the device comprises an image acquisition module, a gray level processing module, a binarization processing module, a slag falling frequency calculation module, a connected domain size calculation module and an alarm module;
the image acquisition module is used for extracting one frame of slag falling image from the video every second; the gray processing module is connected with the image acquisition module; the binarization processing module is connected with the gray level processing module; the slag falling frequency calculation module is connected with the binarization processing module; the connected domain size calculation module is connected with the binarization processing module; and the alarm module is connected with the connected domain size calculation module and the slag falling frequency calculation module.
2. The area array laser radar-based real-time slag falling detection system according to claim 1, wherein in the binarization processing module, a threshold value of binarization processing is set to be 80.
3. The area array laser radar-based real-time slag detection system according to claim 1, wherein a connected domain represents slag in the binarized image output by the binarizing processing module.
4. The system according to claim 1, wherein the slag frequency calculation module is configured to calculate a slag frequency η = N/1, which is expressed in HZ, where N is the number of connected domains of a certain frame of image, and the safety threshold of the slag frequency is 1/40.
5. The system according to claim 1, wherein the size of the connected component is calculated by the module, and the size of the connected component is calculated by the module n The sum of the pixel points in one connected domain is shown, wherein n =1,2,3 … k, and k is the number of the connected domains.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114166120A (en) * | 2021-11-30 | 2022-03-11 | 浙江大学 | Real-time slag falling detection method based on area array laser radar |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114166120A (en) * | 2021-11-30 | 2022-03-11 | 浙江大学 | Real-time slag falling detection method based on area array laser radar |
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