CN210955197U - Device for detecting Ringelmann blackness of diesel engine emissions - Google Patents
Device for detecting Ringelmann blackness of diesel engine emissions Download PDFInfo
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- CN210955197U CN210955197U CN202020116687.6U CN202020116687U CN210955197U CN 210955197 U CN210955197 U CN 210955197U CN 202020116687 U CN202020116687 U CN 202020116687U CN 210955197 U CN210955197 U CN 210955197U
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Abstract
The utility model provides a device for detecting the Ringelmann blackness of diesel engine emissions, which comprises a smoke guide pipe for collecting the emissions, an image acquisition device which is relatively arranged in the smoke guide pipe, a parallel light source which can emit white light, a processor which is connected with the image acquisition device, and a memory which is connected with the processor; the image acquisition device is arranged perpendicular to the length direction of the smoke guide pipe; the image acquisition device is used for shooting a standard blackness image when no emission exists in the smoke guide pipe and a measurement image when emission exists; the memory is used for storing the gray value of the standard blackness image; the processor is used for receiving the image data, calculating and comparing the gray value and determining the Ringelmann blackness of the emissions. The parallel light source provides illumination and when the grey level reference object, the problems that light is insufficient when images are shot in the smoke guide pipe, errors are caused due to different illumination intensities of measuring environments and the like are solved, a light supplementing device and a light intensity sensor are not needed to be arranged, the structure and the detection flow are simplified, the operation is simple and easy, and the result is accurate.
Description
Technical Field
The utility model relates to an engine exhaust detects technical field, concretely relates to detect device of the lingermann blackness of diesel engine emission.
Background
The tail gas discharged by machines or vehicles using diesel engines as power contains a large amount of pollutants, and the living environment and the body health of people are seriously influenced. With the increasing environmental protection importance of the country, the emission standards of machines and vehicles powered by diesel engines are becoming more and more strict. In emission detection, the ringelman blackness is generally adopted to judge whether the exhaust gas of the diesel engine exceeds the standard or not. At present, most of the domestic diesel engine ringer Mannheim detection devices are subjective simulation detection instruments, and the test accuracy and reliability are difficult to guarantee.
The existing diesel engine smoke blackness detection mainly comprises three methods, namely a contrast method, a smoke telescope observation method and a photoelectric smoke detection method, which have certain limitations. Wherein, the comparison method requires the distance from the smoke diagram to the eyes of the observer to be not more than 2 meters, generally about 1.5 meters, and the accurate blackness value is judged by subjective interpretation of the observer. The cigarette telescope is used for installing the ringer-Mannesmia chart in the lens barrel, the distance between the telescope and the ocular lens is small, and the accurate judgment of an observer on the blackness is influenced to a great extent. The photoelectric smoke measurement method requires that clear sky is used as a background, and under the weather conditions of haze, cloudiness or uneven cloud layer thickness, the interference is large, and the test effect is poor. It can be seen that there is a need for improvements and enhancements in the prior art.
SUMMERY OF THE UTILITY MODEL
In view of the foregoing prior art's weak point, the utility model aims to provide a detect device of the linggemann blackness of diesel engine emission, the operation is simple and easy feasible, and the testing result accuracy is high, and light is not enough when having solved and having led in the tobacco pipe and shoot the image, because of measuring the error scheduling problem that environment illumination intensity difference caused.
In order to achieve the purpose, the utility model adopts the following technical proposal:
the utility model provides a device for detecting the Ringelmann blackness of diesel engine emissions, wherein the device comprises a smoke guide pipe, an image acquisition device, a parallel light source capable of emitting white light, a processor and a memory;
the parallel light source and the image acquisition device are arranged in the smoke guide pipe;
the image acquisition device is perpendicular to the length direction of the smoke guide pipe and is arranged opposite to the parallel light source;
the processor is connected with the image acquisition device and the memory;
the smoke guide pipe is used for collecting diesel engine emissions;
the image acquisition device is used for shooting a standard blackness image when no emissions exist in the smoke guide pipe and a measurement image when the emissions circulate in the smoke guide pipe;
the memory is used for storing the standard blackness image data and the reference gray value corresponding to each level of blackness;
the processor is used for receiving the standard blackness image and the measurement image, correspondingly calculating the gray value of the standard blackness image, comparing the gray value of the measurement image with the gray value of the standard blackness image, and determining the Ringelmann blackness of the emissions.
The device for detecting the Ringelmann blackness of the emissions of the diesel engine also comprises a display; the display is connected with the processor and is used for displaying the Ringelmann blackness of the emissions determined by the processor and the working state of the device.
In the device for detecting the Ringelmann blackness of the emissions of the diesel engine, the display is a liquid crystal display screen.
In the device for detecting the Ringelmann blackness of the emissions of the diesel engine, the image acquisition device is a camera.
In the device for detecting the Ringelmann blackness of the emissions of the diesel engine, the parallel light source is a surface light source with stable illumination intensity.
The device for detecting the Ringelmann blackness of the emissions of the diesel engine further comprises a controller; the controller is connected with the processor and used for controlling the working state of the processor.
In the device for detecting the Ringelmann blackness of the emissions of the diesel engine, the controller is connected with the image acquisition device and is used for controlling the working state of the image acquisition device.
The device for detecting the Ringelmann blackness of the emissions of the diesel engine also comprises a lens protective cover; the lens protection cover is fixedly arranged on the smoke guide pipe, and the image acquisition device is positioned on the outer side of the lens protection cover.
Has the advantages that:
the utility model provides a detect device of diesel engine emission's lingemann blackness, the error scheduling problem that light was not enough when having solved the interior shooting image of smoke guide tube, caused because of measuring the difference of environment illumination intensity need not to set up light filling device and light intensity sensor, simplifies the structure and detects the flow, makes detection operation more simple and easy feasible, and the testing result is true accuracy more.
The parallel light source capable of emitting white light is arranged in the smoke guide pipe and is right opposite to the image acquisition device, so that sufficient illumination is provided for the image acquisition device to acquire image data of the emissions, the parallel light source can also be used as a gray reference object for shooting the emissions, and the high-accuracy Ringelmann blackness of the emissions can be obtained through comparison and processing of the processor.
Drawings
Fig. 1 is a schematic structural diagram of the device for detecting the lingermann blackness of the emissions of the diesel engine provided by the present invention.
Fig. 2 is a block diagram of a device for detecting the lingermann blackness of emissions from a diesel engine according to the present invention.
Fig. 3 is a block diagram of another apparatus for detecting the lingermann blackness of emissions from a diesel engine according to the present invention.
Fig. 4 is a block diagram of another apparatus for detecting the lingermann blackness of emissions from a diesel engine according to the present invention.
Fig. 5 is a logic diagram of a method for detecting lingermann blackness of emissions from a diesel engine according to the present invention.
Detailed Description
The utility model provides a detect device of the linggeman blackness of diesel engine emission, for making the utility model discloses a purpose, technical scheme and effect are clearer, more clear and definite, and it is right that the following refers to the drawing and the embodiment of lifting is the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Referring to fig. 1 and 2, the present invention provides a device for detecting the ringelmann blackness of diesel engine emissions, which comprises a smoke guiding pipe 1, an image collecting device 3, a parallel light source 2 capable of emitting white light, a processor 5 and a memory 7; the parallel light source 2 and the image acquisition device 3 are arranged in the smoke guide pipe 1; the image acquisition device 3 is perpendicular to the length direction of the smoke guide pipe 1 and is arranged opposite to the parallel light source 2.
The smoke guide pipe 1 is used for collecting diesel engine emissions. The smoke guide pipe 1 is a tubular part and is used as an area for collecting emissions of a diesel engine so as to be detected, and the smoke guide pipe 1 has enough length, so that errors caused by the influence of external illumination intensity when the image collection device 3 shoots images in the smoke guide pipe 1 can be prevented, and external light cannot enter the shooting range of the image collection device 3. Wherein, looking along the length direction of the smoke guide pipe, the image acquisition device 3 and the parallel light source 2 are arranged in the middle of the smoke guide pipe 1. The shooting range of the image acquisition device 3 is completely arranged in the light emitting range of the parallel light source 2.
The processor 5 is electrically connected with the image acquisition device 3 and the memory 7 through data transmission lines, so that the image acquisition device 3 can transmit the acquired image data to the processor 5. The image acquisition device 3 is used for shooting a standard blackness image (0-5 level) when no diesel engine emissions pass through the smoke guide pipe 1 and a measurement image when the diesel engine emissions pass through the smoke guide pipe 1. The processor 5 is configured to receive the image data such as the standard blackness map image and the measurement image acquired by the image acquisition device 3, calculate gray values of various blackness levels in the standard blackness map image and gray values of the measurement image correspondingly, and compare the gray values of the measurement image with the gray values of the standard blackness map image to determine the lingermann blackness of the diesel engine emissions. The processor may be, but is not limited to, a general-purpose processor such as a central processing unit, a network processor, etc., a digital signal processor, a motherboard integrated with an Intel or ARM series CPU, etc.
The memory 7 is used for storing gray values of various levels of blackness (0 to 5 levels) in the standard blackness image, so that the processor 5 compares the gray values of the measured image of the emissions with the gray values of various levels of blackness in the standard blackness image to judge the lingermann blackness of the emissions.
The image capturing device 3 may be a camera, a video camera, or other devices capable of capturing images. In this embodiment, the image capturing device is a camera. The camera can be but not limited to a CMOS camera, and the CMOS camera is a semiconductor imaging device and has the characteristics of high sensitivity, strong light resistance, small distortion, small volume, long service life and the like.
When the smoke guide pipe 1 is connected with a smoke exhaust pipe of a diesel engine, the emissions are guided into the smoke guide pipe, and the emissions flow along the length direction of the smoke guide pipe. In the process of flowing of the emissions, the parallel light source 2 is started, the parallel light source 2 emits white light perpendicular to the flowing direction of the emissions, then the image acquisition device 3 is started, the image acquisition device 3 shoots a measurement image (including the emissions to be measured and the parallel light source serving as a gray reference object) of the emissions under the irradiation of the parallel light source 2, and the parallel light source 2 arranged opposite to the image acquisition device 3 not only provides an image acquisition environment with better light for the image acquisition device, solves the problem of insufficient light when the image is shot in the smoke guide pipe, but also serves as a gray reference object, and provides a white background with a comparative reference blackness for the emissions.
Before measurement, the parallel light source 2 and the image acquisition device 3 are operated at the same time, the image acquisition device 3 shoots images (6 images in total) of 0-5 levels of standard blackness images under the working condition of the parallel light source 2 (namely, the parallel light source is used as a background) in advance, and gray values corresponding to the standard blackness image images of all levels are calculated and then stored in a memory to be used as a comparison standard of emission images.
Further, as shown in fig. 3, the apparatus for detecting the lingerman blackness of emissions from a diesel engine further includes a display 6; the display 6 is electrically connected with the processor 5 through a data transmission line and is used for displaying the Ringelmann blackness of the emissions determined by the processor 5, so that a measurement worker can intuitively and clearly know the Ringelmann blackness of the measured emissions and judge whether an overproof emission condition exists or not; and displaying the working state of the device for detecting the Ringelmann blackness of the diesel engine emissions (the device for short), so that workers can know whether the device normally operates and the operating state of the device conveniently.
The display 6 may be, but is not limited to, an organic light emitting diode display screen, a liquid crystal display screen, or the like. In this embodiment, the display 6 is a liquid crystal display, which may be a touch-controllable liquid crystal display or a general liquid crystal display.
Further, as shown in fig. 4, the apparatus for detecting the lingerman blackness of emissions from a diesel engine further includes a controller 8; the controller 8 is electrically connected with the processor 5 through a data transmission line, and is used for controlling the processor 5 to work. The controller 8 outputs a control signal to the processor 5, the processor 5 receives the emission image data (i.e. the measurement image) shot by the image acquisition device 3, measures the gray value of the emission image data, and the controller 8 calls the reference gray value stored in the memory 7, and then performs data comparison and analysis to obtain the lingermann blackness.
Specifically, the parallel light source 2 is a surface light source with stable illumination intensity, and can provide stable white light illumination.
In addition, the controller 8 is electrically connected to the image acquisition device 3 through a data transmission line, and is configured to control a working state of the image acquisition device 3, and control working states of the image acquisition device 3, such as startup, shutdown, and shooting. In this embodiment, the controller 8 is a switch controller, and controls the operation and the stop of the image capturing device 3 and the processor 5.
After each measurement, the lens of the image acquisition device 3 and the irradiation surface of the parallel light source 2 need to be cleaned, so that the influence of emissions attached to the lens and the light source surface during the previous measurement on the detection result of the next measurement is reduced.
Further, as shown in fig. 1, the device for detecting the ringelman blackness of the diesel engine emissions further comprises a lens protection cover 4; the lens protection cover 4 is fixedly arranged on the smoke guide tube 1, the image acquisition device 3 is fixed on the smoke guide tube 1 and positioned outside the lens protection cover 4 to prevent the emission from contaminating the lens of the image acquisition device 3, and the lens protection cover 4 can be but is not limited to glass with high light transmittance. After each measurement, the lens protection cover needs to be cleaned to remove emissions attached to the inner surface of the lens protection cover, thereby ensuring that the lens protection cover maintains high light transmission capability.
In addition, the present invention also provides a method for detecting the ringelmann blackness of emissions from a diesel engine, as shown in fig. 5, the method comprising the steps of:
s100: carrying out calibration work before measurement; the processor receives standard blackness image data (namely image data of a 0-5-level standard blackness image) shot by the image acquisition device when no emission passes under the working state of the parallel light source, and the gray value of the blackness of the corresponding level is calculated according to the standard blackness image data of the corresponding level and is stored in the memory as a reference gray value for judging the blackness of the emission. The gray values corresponding to the blackness of each level are stored in a memory and provide comparison reference.
S200: performing emission detection work; the processor receives the measured image data which is shot by the image acquisition device and passes through the discharge materials under the working state of the parallel light source, and calculates the gray value of the measured image. During measurement, the smoke guide pipe is connected to a smoke exhaust pipe of the diesel engine in a sleeving manner, so that the emissions flow in the smoke guide pipe and are exhausted from an outlet of the smoke guide pipe; then starting a parallel light source, acquiring a measurement image of the emission by using an image acquisition device, and transmitting the acquired measurement image data to a processor; the processor determines a gray scale value of the emissions from the measured image data.
S300: judging the Ringelmann blackness of the emissions; and comparing the gray value of the measured image with the gray value corresponding to the blackness of the corresponding level in the memory, and then determining the Ringelmann blackness of the emissions according to the comparison result. After the gray value of the emission (namely the measurement image) is calculated, the processor calls the gray value corresponding to each level of blackness in the memory, and judges which level of the ringer Mannheim of the emission reaches to the ringer Mannheim 5 levels according to the gray value of the emission, so as to judge whether the over-standard emission exists.
Further, as shown in fig. 5, the method for detecting the lingerman blackness of the emissions of the diesel engine further includes the step S400 of: and after each measurement, cleaning a lens of the image acquisition device and the irradiation surface of the parallel light source. In order to avoid the detection result from large errors caused by the influence of emissions attached to the lens of the image acquisition device and the light source surface of the parallel light source during the previous measurement, the detection is inaccurate, and the lens and the light source surface need to be cleaned during each measurement, so that the influence of the emissions attached to the lens and the light source surface is eliminated, and the accuracy is improved.
To sum up, the utility model provides a detect device of diesel engine emission's linggeman blackness, device simple structure measures accurately, and the error scheduling problem that light was not enough when having solved the interior shooting image of leading the tobacco pipe, caused because of measuring the difference of environment illumination intensity need not to set up light filling device and light intensity sensor, simplifies the structure and detects the flow, makes detection operation more simple and easy feasible, and the testing result is true accuracy more.
The parallel light source capable of emitting white light is arranged in the smoke guide pipe just opposite to the image acquisition device, so that sufficient illumination is provided for the image acquisition device to acquire image data of the emissions, the parallel light source can also be used as a gray reference object for shooting images, and the high-accuracy Ringelmann blackness of the emissions can be obtained through comparison and processing of the processor.
It should be understood that equivalent alterations and modifications can be made by those skilled in the art according to the technical solution of the present invention and the inventive concept thereof, and all such alterations and modifications should fall within the scope of the appended claims.
Claims (8)
1. The device for detecting the Ringelmann blackness of the emissions of the diesel engine is characterized by comprising a smoke guide pipe, an image acquisition device, a parallel light source capable of emitting white light, a processor and a memory;
the parallel light source and the image acquisition device are arranged in the smoke guide pipe;
the image acquisition device is perpendicular to the length direction of the smoke guide pipe and is arranged opposite to the parallel light source;
the processor is connected with the image acquisition device and the memory;
the smoke guide pipe is used for collecting diesel engine emissions;
the image acquisition device is used for shooting a standard blackness image when no emissions exist in the smoke guide pipe and a measurement image when the emissions circulate in the smoke guide pipe;
the memory is used for storing the standard blackness image data and the reference gray value corresponding to each level of blackness;
the processor is used for receiving the standard blackness image and the measurement image, correspondingly calculating the gray value of the standard blackness image, comparing the gray value of the measurement image with the gray value of the standard blackness image, and determining the Ringelmann blackness of the emissions.
2. The apparatus for detecting ringer's blackness of an emission from a diesel engine as set forth in claim 1, further comprising a display;
the display is connected with the processor and is used for displaying the Ringelmann blackness of the emissions determined by the processor and the working state of the device.
3. The apparatus for detecting ringer's blackness of diesel engine emissions as set forth in claim 2, wherein the display is a liquid crystal display.
4. The apparatus for detecting ringer's blackness of an emission from a diesel engine as set forth in claim 1, wherein the image capture device is a camera.
5. The apparatus for detecting ringer Mannheim of diesel engine emissions as set forth in claim 1, wherein the collimated light source is a surface light source with stable illumination intensity.
6. The apparatus for detecting ringer's blackness of an emission from a diesel engine as set forth in claim 1, further comprising a controller;
the controller is connected with the processor and used for controlling the working state of the processor.
7. The apparatus of claim 6, wherein the controller is coupled to the image capturing device for controlling the operating state of the image capturing device.
8. The apparatus for detecting ringer's blackness of diesel engine emissions as set forth in claim 1, further comprising a lens protection cover;
the lens protection cover is fixedly arranged on the smoke guide pipe, and the image acquisition device is positioned on the outer side of the lens protection cover.
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| CN202020116687.6U CN210955197U (en) | 2020-01-17 | 2020-01-17 | Device for detecting Ringelmann blackness of diesel engine emissions |
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| CN202020116687.6U CN210955197U (en) | 2020-01-17 | 2020-01-17 | Device for detecting Ringelmann blackness of diesel engine emissions |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067521A (en) * | 2020-09-29 | 2020-12-11 | 浙江省特种设备科学研究院 | Shooting type smoke intensity detection device for diesel machinery |
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- 2020-01-17 CN CN202020116687.6U patent/CN210955197U/en not_active Ceased
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112067521A (en) * | 2020-09-29 | 2020-12-11 | 浙江省特种设备科学研究院 | Shooting type smoke intensity detection device for diesel machinery |
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Decision date of declaring invalidation: 20210528 Decision number of declaring invalidation: 49838 Granted publication date: 20200707 |