CN106908452A - Engine lubricating oil quality monitoring device based on machine vision - Google Patents
Engine lubricating oil quality monitoring device based on machine vision Download PDFInfo
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- CN106908452A CN106908452A CN201710272713.7A CN201710272713A CN106908452A CN 106908452 A CN106908452 A CN 106908452A CN 201710272713 A CN201710272713 A CN 201710272713A CN 106908452 A CN106908452 A CN 106908452A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
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- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
Abstract
The invention discloses a kind of engine lubricating oil quality monitoring device based on machine vision, including lighting unit, image acquisition units, graphics processing unit, early warning unit, early warning unit includes lamp driving circuit and early warning lamp, the signal output part of image acquisition units is connected with the signal input part of graphics processing unit, the signal output part of graphics processing unit is connected with the signal input part of lamp driving circuit, and the signal output part of lamp driving circuit is connected with early warning lamp.The present invention is monitored based on computer vision to engine lubricating oil, and by detecting that the conventional apparatus that the physicochemical properties of lubricating oil are detected to quality of lubrication oil are contrasted, has the advantages that the simple and convenient, accuracy of implementation is high, sensitivity is high.
Description
Technical field
The present invention relates to engine lubricating oil detection means field, more specifically to a kind of based on machine vision
Engine lubricating oil quality monitoring device.
Background technology
Engine lubricating oil has the four big major functions such as lubrication, sealing, cleaning, cooling, and the quality of lubricating oil is straight
Connect the fault rate of the job stability and engine system that are related to engine.Lubricating oil is within the engine with the duration of runs
Accumulation, is aoxidized due to lubricating oil, fuel-steam moisture is invaded, the wearer of parts etc., ultimately results in profit by high temperature
Lubricating oil is influenceed and is polluted by them.So need often irregularly more oil change be ensure engine work must
Want condition.The quality to engine lubricating oil detect mainly thering is two kinds at present：It is online and offline.Off-line technology mainly passes through
Collection engine lubricating oil sample, its performance and state are analyzed by certain instrument and equipment, and these Instrument measuring precisions are high, but
It is bulky, it is more long the time required to being not suitable for on-the-spot test, and detection.On-line monitoring method is mainly by electrical conductivity to hair
Motivation quality of lubrication oil is monitored, and in carrying out detection method to engine lubricating oil by electrical conductivity, sensor tube wall is to electricity
The propagation of magnetic wave has certain interference, and this causes that measurement result is inaccurate.
Machine vision is one and is related to the new branch of science of numerous areas, covers psychophysics, computer science, artificial intelligence
The contents such as energy, Neurobiology, image procossing and pattern-recognition.It utilizes the anthropomorphic visual performance of computer mould, from objective thing
Useful information is extracted in the image of thing, is acted upon and is understood, be eventually used for engineering survey and control.Make in engine lubricating oil
During, when the chemical composition of oil changes or mixes mixture, can be along with the change of color.The present invention is based on
The engine lubricating oil quality detection device of machine vision monitors quality of lubrication oil by observing the change of lube color, essence
Exactness is high, sensitivity is strong.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of engine lubricating oil quality-monitoring based on machine vision
Device.
The technical solution adopted for the present invention to solve the technical problems is：A kind of engine profit based on machine vision of construction
Lubricating oil quality monitoring device, including lighting unit, image acquisition units, graphics processing unit, early warning unit, the early warning
Tip element includes lamp driving circuit and early warning lamp, at the signal output part and described image of described image collecting unit
The signal input part connection of unit is managed, the signal output part of described image processing unit is defeated with the signal of the lamp driving circuit
Enter end connection, the signal output part of the lamp driving circuit is connected with the early warning lamp；Described image collecting unit is used
In the collection lubricating oil original state image under the irradiation of lighting unit；Described image processing unit is used to set up lubricating oil to be measured
With original state lubricating oil image pair, image is extracted to the characteristic vector based on hsv color space, calculate image to characteristic vector
Correlation coefficient value, judge whether lubricating oil changes according to correlation coefficient value；The early warning unit is used in picture
Control and startup lamp driving circuit, light early warning lamp automatically when processing unit judges that lubricating oil changes.
In such scheme, the lighting unit is LED, is arranged on the position that can be illuminated lubricating oil.
In such scheme, described image collecting unit be high temperature resistant ccd video camera and the corresponding camera lens of video camera, if
Putting can shoot the position of lubricating oil.
In such scheme, described image processing unit is arm processor.
Implement engine lubricating oil quality monitoring device of the present invention based on machine vision, have the advantages that：
1st, the present invention is monitored based on computer vision to engine lubricating oil, can effectively monitor the matter of lubricating oil
Amount, prevents the quality of lubrication oil engine failure for causing not up to standard, has ensured the stationarity of engine work；
2nd, the present invention gathers engine lubricating oil image by high temperature resistant ccd video camera, is extracted according to graphics processing unit
Color of image characteristic vector, is carried out lubricating oil characteristics of image with original state lubricating oil characteristics of image using coefficient correlation algorithm
Matching, draws the similarity degree of color of image, according to the similarity degree of color of image, judges whether the quality of lubricating oil meets mark
It is accurate.
3rd, the present invention is monitored based on computer vision to engine lubricating oil, with the physical chemistry by detecting lubricating oil
The contrast of conventional apparatus that property is detected to quality of lubrication oil, it is excellent with implementing that simple and convenient, accuracy is high, sensitivity is high etc.
Point.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is the structural representation of engine lubricating oil quality monitoring device of the present invention based on machine vision；
Fig. 2 is schematic flow sheet of the graphics processing unit to picture processing in the present invention.
Specific embodiment
In order to be more clearly understood to technical characteristic of the invention, purpose and effect, now compare accompanying drawing and describe in detail
Specific embodiment of the invention.
As shown in figure 1, the present invention provides a kind of engine lubricating oil quality monitoring device based on machine vision, including shine
Bright unit, image acquisition units, graphics processing unit, early warning unit.Early warning unit include lamp driving circuit and
Early warning lamp, the signal output part of image acquisition units is connected with the signal input part of graphics processing unit, image procossing list
The signal output part of unit is connected with the signal input part of lamp driving circuit, and signal output part and the early warning of lamp driving circuit are carried
Show that lamp is connected.Preferably, lighting unit is the aid of image acquisition units, and it uses LED, and being arranged on can be by lubricating oil
The position illuminated, it is therefore an objective to obtain high-quality view data.
Image acquisition units are high temperature resistant ccd video camera and the corresponding camera lens of video camera, and being arranged on can shoot lubricating oil
Position.The present invention gathers lubricating oil image by high temperature resistant ccd video camera, and image is conveyed into graphics processing unit.
Graphics processing unit is arm processor, and it is used to set up lubricating oil to be measured and original state lubricating oil image pair, carries
Image is taken to the characteristic vector based on hsv color space, correlation coefficient value of the image to characteristic vector is calculated, according to coefficient correlation
Value judges whether lubricating oil changes.
Early warning unit is used for control and startup light fixture when picture processing unit judges lubricating oil changes and drives
Circuit, lights early warning lamp automatically.
The course of work of the invention is as follows：
Image acquisition units gather lubricating oil original state image under the irradiation of lighting unit, and image is transmitted at image
Reason unit.Graphics processing unit storage gathers lubricating oil original state image.
In monitoring process, image acquisition units obtain lubrication under the irradiation of lighting unit by high temperature resistant ccd video camera
Oily image, graphics processing unit is transmitted by image.
Graphics processing unit obtains the RGB color information of image, and is transformed into hsv color space.Hsv color is empty
Between chromatic component H distribution axles be divided into 8 spaces, be 3 spaces saturation degree S point, luminance component V points is 3 spaces.According to
It is G=9H+3S that tri- components of H, S, V determine that color characteristic quantifies to integrate in color-aware on the significance level of visual signature influence
+V.So tri- components of H, S, V are distributed on a n dimensional vector n and, and the span of G is 0~71.Statistics obtains the HSV of image
Color Statistical histogram, in histogram,
In above formula, i is that color characteristic quantifies to concentrate element, niIt is that color feature value is the number of pixels of i, N is pixel
Sum.After being counted to G, image obtains 72 one-dimensional characteristic vectors of color component, and this feature vector is image
Characteristic vector.
As shown in Fig. 2 graphics processing unit sets up lubricating oil to be measured and original state lubricating oil image pair, image pair is extracted
Characteristic vector based on hsv color space and after being normalized, using coefficient correlation algorithm by lubricating oil characteristics of image to be measured
Matched with original state lubricating oil characteristics of image, drawn two kinds of correlation coefficient value of color feature vector.Two image normalizings
Characteristic vector after change is respectively A and B, then the coefficient correlation between A and B is：
Extracting many parts needs replacing lubricating oil sample to be tested with original state lubricating oil sample, it is determined that needing to change profit
Lubricating oil is based on the coefficient correlation ω of the characteristic vector in hsv color space with original state lubricating oil.In the lubricating oil course of work,
When its color characteristic reaches ω values to the coefficient correlation with original state color feature vector, system judges that quality of lubrication oil is not inconsistent
Standardization.
When picture processing unit judges quality of lubrication oil is not inconsistent standardization, control early warning unit starting light fixture drives
Circuit, early warning lamp is lighted automatically.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Implementation method, above-mentioned specific embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under enlightenment of the invention, in the case of present inventive concept and scope of the claimed protection is not departed from, can also make a lot
Form, these are belonged within protection of the invention.
Claims (4)
1. a kind of engine lubricating oil quality monitoring device based on machine vision, including lighting unit, image acquisition units, figure
As processing unit, early warning unit, it is characterised by,
The early warning unit includes lamp driving circuit and early warning lamp, the signal output part of described image collecting unit
Signal input part with described image processing unit is connected, and the signal output part of described image processing unit drives with the light fixture
The signal input part connection of circuit, the signal output part of the lamp driving circuit is connected with the early warning lamp；
Described image collecting unit is used to gather lubricating oil original state image under the irradiation of lighting unit；
Described image processing unit is used to set up lubricating oil to be measured and original state lubricating oil image pair, extracts image to being based on
The characteristic vector in hsv color space, calculates image to the coefficient correlation of characteristic vector, judges that lubricating oil is according to correlation coefficient value
It is no to change；
The early warning unit is used for control and startup light fixture when picture processing unit judges lubricating oil changes and drives
Circuit, lights early warning lamp automatically.
2. the engine lubricating oil quality monitoring device based on machine vision according to claim 1, it is characterised in that institute
It is LED to state lighting unit, is arranged on the position that can be illuminated lubricating oil.
3. the engine lubricating oil quality monitoring device based on machine vision according to claim 1, it is characterised in that institute
Image acquisition units are stated for high temperature resistant ccd video camera and the corresponding camera lens of video camera, the position that can shoot lubricating oil is arranged on.
4. the engine lubricating oil quality monitoring device based on machine vision according to claim 1, it is characterised in that institute
Graphics processing unit is stated for arm processor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710272713.7A CN106908452A (en) | 2017-04-24 | 2017-04-24 | Engine lubricating oil quality monitoring device based on machine vision |
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| CN201710272713.7A CN106908452A (en) | 2017-04-24 | 2017-04-24 | Engine lubricating oil quality monitoring device based on machine vision |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108680579A (en) * | 2018-03-30 | 2018-10-19 | 武汉理工大学 | Crane hydraulic oil on-line monitor for pollution based on machine vision and method |
| CN111373258A (en) * | 2017-12-05 | 2020-07-03 | 国际商业机器公司 | Discriminating fluids based on determining and analyzing digital image color space characteristics |
| CN113614513A (en) * | 2019-03-29 | 2021-11-05 | 出光兴产株式会社 | Lubricating oil degradation determination system and lubricating oil degradation determination method |
| CN115115621A (en) * | 2022-08-24 | 2022-09-27 | 聊城市泓润能源科技有限公司 | Lubricating oil pollution degree detection method based on image processing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111373258A (en) * | 2017-12-05 | 2020-07-03 | 国际商业机器公司 | Discriminating fluids based on determining and analyzing digital image color space characteristics |
| CN108680579A (en) * | 2018-03-30 | 2018-10-19 | 武汉理工大学 | Crane hydraulic oil on-line monitor for pollution based on machine vision and method |
| CN113614513A (en) * | 2019-03-29 | 2021-11-05 | 出光兴产株式会社 | Lubricating oil degradation determination system and lubricating oil degradation determination method |
| CN115115621A (en) * | 2022-08-24 | 2022-09-27 | 聊城市泓润能源科技有限公司 | Lubricating oil pollution degree detection method based on image processing |
| CN115115621B (en) * | 2022-08-24 | 2022-11-11 | 聊城市泓润能源科技有限公司 | Lubricating oil pollution degree detection method based on image processing |
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Application publication date: 20170630 |