CN202486054U - Two-channel single-oil-pool lubricating oil pollution degree detection device based on optical transmission technology - Google Patents
Two-channel single-oil-pool lubricating oil pollution degree detection device based on optical transmission technology Download PDFInfo
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- CN202486054U CN202486054U CN2012200677634U CN201220067763U CN202486054U CN 202486054 U CN202486054 U CN 202486054U CN 2012200677634 U CN2012200677634 U CN 2012200677634U CN 201220067763 U CN201220067763 U CN 201220067763U CN 202486054 U CN202486054 U CN 202486054U
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Abstract
The utility model provides a two-channel single-oil-pool lubricating oil pollution degree detection device based on optical transmission technology and belongs to the technical field of automobiles. The two-channel single-oil-pool lubricating oil pollution degree detection device based on the optical transmission technology solves the problem of that an existing lubricating oil pollution degree detection device is complicated in structure. The two-channel single-oil-pool lubricating oil pollution degree detection device based on the optical transmission technology comprises a light source and an optical detector, an oil pool measuring structure for detecting lubricating oil pollution degree and an optical fiber coupler for dividing the light source into two parts are arranged between the light source and the optical detector, the input end of the optical fiber coupler is connected with the light source, a first output end of the optical fiber coupler, the oil pool measuring structure and the optical detector are connected in sequence to form a first light path, a first switch is arranged on the first light path, a second output end of the optical fiber coupler and the optical detector are connected to form a second light path, and a second switch is arranged on the second light path. The two-channel single-oil-pool lubricating oil pollution degree detection device based on the optical transmission technology is simple in structure and improves detection accuracy of the lubricating oil pollution degree.
Description
Technical field
The utility model belongs to automobile technical field, relates to a kind of single oil sump lubricant pollution of binary channels degree pick-up unit that passes through technology based on light.
Background technology
In the plant equipment such as automobile, engineering machinery; The operating condition that lubricating oil is good; Important assurance can be provided for the safe operation of equipment; Because the equipment operation operating mode is extremely complicated, internal and external factor all can exert an influence with equipment and causes early stage hidden trouble of equipment at any time system, like the extraneous or inner water that produces with dustiness is assembled in a short time or increase suddenly; Gear, the premature wear fault of bearing; These can not be detected through conventional periodic inspection chamber; And online lubricated monitoring system can monitor and analyze with the equipment operation operating mode lubricated in real time; For equipment maintenance provides reliable foundation; Therefore the quality of lubricating oil is carried out check and analysis, guarantee that the lubricating status of plant equipment just seems particularly important.Common lubricating oil detection technique has means such as electric capacity, inductance, grain count at present, but grows, uses inconvenience, costs an arm and a leg based on the detecting instrument sense cycle of above detection method, is unfavorable for that engineering site extensively adopts.
Photo-detector is claimed photodetector again, is the primary part of photoreceiver, and photo-detector is the pith that Fibre Optical Sensor constitutes, and its performance index will directly influence the performance of sensor.Can detect the luminous power that incides on its face, and be converted into corresponding electric current to the variation of this luminous power.
Existing Chinese patent document discloses a kind of online oil liquid monitoring sensor based on double light path [application number: CN200410013354.6]; Comprise the y-type optical fiber coupling mechanism, the input end of its y-type optical fiber coupling mechanism is linked to each other with light source by optical fiber, and the output terminal of y-type optical fiber coupling mechanism is divided into two the tunnel; Link to each other with an end of two road incident opticals respectively; The other end of one road incident optical contacts with GRIN Lens, and the other end of another road incident optical contacts with GRIN Lens, and GRIN Lens is positioned at the rear with reference to oil sump; One end of outgoing optical fiber contacts with GRIN Lens; The other end of outgoing optical fiber links to each other with photo-detector, and photo-detector is connected with computing machine by data line, and reference fluid is positioned at reference to oil sump.This invention divides two the tunnel through the y-type optical fiber coupling mechanism with light source, but the detection of its two road signal all need just can be transferred to through GRIN Lens separately and detects on the photo-detector and need respectively the photo-detector through separately to detect complex structure.
Summary of the invention
The purpose of the utility model is to have the problems referred to above to existing technology, has proposed a kind ofly to be used to detect the lubricant pollution degree and simple in structure to pass through the single oil sump lubricant pollution of the binary channels degree pick-up unit of technology based on light.
The purpose of the utility model can realize through following technical proposal: the single oil sump lubricant pollution of the binary channels degree pick-up unit that passes through technology based on light; Comprise light source and photo-detector; Between said light source and photo-detector, be provided with the oil sump measurement structure and the fiber coupler that is used for light source is divided into two that are used to detect the lubricant pollution degree; The input end of said fiber coupler is connected with light source; First output terminal of said fiber coupler, above-mentioned oil sump measurement structure and above-mentioned photo-detector are in turn connected to form first light path and first switch are set on first light path, and second output terminal of said fiber coupler and above-mentioned photo-detector are connected to form second light path and on second light path, second switch are set.
This passes through the single oil sump lubricant pollution of the binary channels degree pick-up unit of technology based on light; Its light source is connected with fiber coupler; The light that fiber coupler sends light source divides the two-way transmission; First output terminal of the first optical routing fiber coupler is connected with photo-detector with the oil sump measurement structure successively; Second output terminal of the second optical routing fiber coupler is connected with photo-detector, on these two light paths, is respectively arranged with first switch and second switch, comes to detect respectively the light signal of first light path and second light path and the light signal of output is handled through controlling opening and closing that first switch and second closes switch respectively.
In the single oil sump lubricant pollution of the binary channels degree pick-up unit of the above-mentioned technology of passing through based on light; Described oil sump measurement structure comprises the measurement oil sump; Be connected with first GRIN Lens and second GRIN Lens respectively at measurement oil sump two ends; Described first GRIN Lens is connected with first output terminal of fiber coupler through optical fiber, and said second GRIN Lens is connected with said photo-detector through optical fiber.
In the single oil sump lubricant pollution of the binary channels degree pick-up unit of the above-mentioned technology of passing through based on light, described first switch is arranged between first output terminal and first GRIN Lens of said fiber coupler.
In the above-mentioned single oil sump lubricant pollution of the binary channels degree pick-up unit that passes through technology based on light, described second switch is arranged between second output terminal and the above-mentioned photo-detector.
In the single oil sump lubricant pollution of the binary channels degree pick-up unit of the above-mentioned technology of passing through based on light, described fiber coupler is 1 * 2 two-way fiber coupler.
In the single oil sump lubricant pollution of the binary channels degree pick-up unit of the above-mentioned technology of passing through based on light, described light source adopts the good light emitting diode of monochromaticity.This light emitting diode can be exported stable light intensity at short notice.
In the above-mentioned single oil sump lubricant pollution of the binary channels degree pick-up unit that passes through technology based on light, described measurement oil sump in a tubular form and adopting quartz glass process.This measurement oil sump adopting quartz glass process be because of its have high temperature resistant, expansion coefficient is low, resistance to heat shocks, chemical stability and the good characteristics of electrical insulation capability, and can see through ultraviolet ray and infrared ray.
Compared with prior art, this has the following advantages based on the single oil sump lubricant pollution of the binary channels degree pick-up unit that light passes through technology:
1, the utility model detects the light signal of two light paths and is lubricated the detection of oil contamination degree through single photo-detector through the opening and closing of controlling first switch and second switch respectively, and it is simple in structure.
2, the utility model utilizes optical fiber directly to conduct replacement contrast oil circuit, has simplified lubricant pollution degree pick-up unit.
Description of drawings
Fig. 1 is the principle assumption diagram of the utility model.
Among the figure, 1, light source; 2, oil sump measurement structure; 21, measure oil sump; 22, first GRIN Lens; 23, second GRIN Lens; 3, photo-detector; 4, fiber coupler; 5, first switch; 6, second switch.
Embodiment
Below be the specific embodiment of the utility model and combine accompanying drawing, the technical scheme of the utility model is done further to describe, but the utility model is not limited to these embodiment.
As shown in Figure 1; This passes through the single oil sump lubricant pollution of the binary channels degree pick-up unit of technology based on light; Comprise light source 1 and photo-detector 3; Between light source 1 and photo-detector 3, be provided with the oil sump measurement structure 2 and the fiber coupler 4 that is used for light source 1 is divided into two that are used to detect the lubricant pollution degree; The input end of fiber coupler 4 is connected with light source 1, and first output terminal of fiber coupler 4, oil sump measurement structure 2 and above-mentioned photo-detector 3 are in turn connected to form first light path and first switch 5 is set on first light path, and second output terminal of fiber coupler 4 and above-mentioned photo-detector 3 are connected to form second light path and second switch 6 is set on second light path.
Specifically; Oil sump measurement structure 2 comprises measures oil sump 21; Be connected with first GRIN Lens 22 and second GRIN Lens 23 respectively at measurement oil sump 21 two ends; First GRIN Lens 22 is connected with first output terminal of fiber coupler 4 through optical fiber, and second GRIN Lens 23 is connected with photo-detector 3 through optical fiber, its measurement oil sump 21 in a tubular form also adopting quartz glass process; These measurement oil sump 21 adopting quartz glass process be because of its have high temperature resistant, expansion coefficient is low, resistance to heat shocks, chemical stability and the good characteristics of electrical insulation capability, and can see through ultraviolet ray and infrared ray; First switch 5 is arranged between first output terminal and first GRIN Lens 22 of fiber coupler 4; Second switch 6 is arranged between second output terminal and the photo-detector 3; Fiber coupler 4 is 1 * 2 two-way fiber coupler; Light source 1 adopts the good light emitting diode of monochromaticity, and this light emitting diode can be exported stable light intensity at short notice.
This divides the two-way transmission based on the light that the technological thoroughly single oil sump lubricant pollution of the binary channels degree pick-up unit of light sends light source 1 through fiber coupler 4; First output terminal of the first optical routing fiber coupler 4 and oil sump measurement structure 2 connect to form with photo-detector 3 successively; Second output terminal and the photo-detector 3 of the second optical routing fiber coupler 4 connect to form; On these two light paths, be respectively arranged with first switch 5 and second switch 6, come to detect respectively the light signal of first light path and second light path and the light signal of exporting is handled through controlling opening and closing that first switch 5 and second closes switch respectively.
During use; Choose the absolute oil moment and detect two time points constantly; With first switch, 5 closures, when second switch 6 is opened; The light that sends in the light source 11, converts directional light through light transmission fiber into behind first GRIN Lens 22 and incides in the measurement oil sump 21 to first light path that is connected with fiber coupler 4 first output terminals through Optical Fiber Transmission; Directional light compiles directional light and passes through light transmission fiber in photo-detector 3 through second GRIN Lens 23 after measuring oil sump 21, and photo-detector 3 detects this first light path respectively at the absolute oil moment and sump oil light signal constantly; During with 5 unlatchings of first switch, second switch 6 closures; The light that sends in the light source 11; To second light path that is connected with fiber coupler 4 second output terminals, give photo-detector 3 through light transmission fiber through Optical Fiber Transmission, photo-detector 3 detects this second light path respectively at the absolute oil moment and sump oil light signal constantly; This second light path is an air flue, and it utilizes optical fiber directly to conduct replacement contrast oil circuit; Photo-detector 3 is transferred to computing machine with four output signals being surveyed through data line, through computing machine these four output signals is carried out the delta data that analyzing and processing obtains reaction lubricant pollution degree, and its concrete analysis step is following:
1, chooses the absolute oil moment and detect two time points constantly; With first switch 5 open, second switch 6 is closed or with first switch 5 close, second switch 6 opens; Photo-detector 3 detects four output signals respectively, can obtain according to the Beer-Lambert law:
During absolute oil:
Q
2'=m α
1I
1e
-τ L
During greasy dirt:
Q
2The α of "=(1-m)
2I
2e
-τ L
In the formula, τ
1, τ
2, τ is respectively and the attenuation coefficient of irrelevant absolute oil, sump oil and the air of light intensity, L is the measurement light path of 2 paths, I is an incident light excitation current intensity, α is an incident light excitation diode photoelectric transformation efficiency, m is the photo-coupler spectroscopical effeciency, Q
1Be light intensity behind the process oil circuit, Q
2Be light intensity after the process light path;
2, the receiving end that photo-detector 3 is set is λ in the photoelectric transformation efficiency of two time points
1, λ
2, calculating can obtain:
By following formula, light path through the ratio T of photo-detector 3 back output voltages only with τ
1, τ
2Relevant; Thereby not only solved the influence of extraneous factors such as the conventional light path light intensity measurement is difficult, lubricating oil is colour inhomogeneous; Also eliminated light intensity instability, optically-coupled original paper spectroscopy efficient difference, the error that different oils color extraneous factor is brought has improved measuring accuracy.
The instability of photo-detector 3 opto-electronic conversion of bringing to problem of aging, the ingenious combination that utilizes fiber coupler 4 and photoswitch.Measure constantly at certain; Open and close first switch 5, second switch 6 respectively; Detect two detected signals of photo-detector 3 this moment; The varying voltage signal that photo-detector 3 is detected is made comparison; Through analyzing, can obtain
then
thus eliminated because the instability that the photoelectricity that series of influence factors such as aging is brought transforms.
Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from the spirit of the utility model or surmount the defined scope of appended claims.
Although the possibility of using other term do not got rid of in terms such as this paper used light source 1, oil sump measurement structure 2, measure oil sump 21, first GRIN Lens 22, second GRIN Lens 23, photo-detector 3, fiber coupler 4, first switch 5, second switch 6 morely.Using these terms only is in order to describe and explain the essence of the utility model more easily; It all is contrary with the utility model spirit being construed to any additional restriction to them.
Claims (7)
1. pass through the single oil sump lubricant pollution of the binary channels degree pick-up unit of technology based on light; Comprise light source (1) and photo-detector (3); It is characterized in that; Between said light source (1) and photo-detector (3), be provided with and be used to the fiber coupler (4) that detects the oil sump measurement structure (2) of lubricant pollution degree and be used for light source (1) is divided into two; The input end of said fiber coupler (4) is connected with light source (1); First output terminal of said fiber coupler (4), above-mentioned oil sump measurement structure (2) and above-mentioned photo-detector (3) are in turn connected to form first light path and first switch (5) are set on first light path, and second output terminal of said fiber coupler (4) and above-mentioned photo-detector (3) are connected to form second light path and second switch (6) is set on second light path.
2. the single oil sump lubricant pollution of the binary channels degree pick-up unit that passes through technology based on light according to claim 1; It is characterized in that; Described oil sump measurement structure (2) comprises measures oil sump (21); Be connected with first GRIN Lens (22) and second GRIN Lens (23) respectively at measurement oil sump (21) two ends; Described first GRIN Lens (22) is connected with first output terminal of fiber coupler (4) through optical fiber, and said second GRIN Lens (23) is connected with said photo-detector (3) through optical fiber.
3. according to claim 2 based on the technological thoroughly single oil sump lubricant pollution of the binary channels degree pick-up unit of light, it is characterized in that described first switch (5) is arranged between first output terminal and first GRIN Lens (22) of said fiber coupler (4).
4. according to claim 1 or the 2 or 3 described single oil sump lubricant pollution of binary channels degree pick-up units, it is characterized in that described second switch (6) is arranged between second output terminal and the above-mentioned photo-detector (3) based on the light technology of passing through.
5. according to claim 1 or the 2 or 3 described single oil sump lubricant pollution of binary channels degree pick-up units, it is characterized in that described fiber coupler (4) is 1 * 2 two-way fiber coupler (4) based on the light technology of passing through.
6. according to claim 1 or the 2 or 3 described single oil sump lubricant pollution of binary channels degree pick-up units, it is characterized in that described light source (1) adopts the good light emitting diode of monochromaticity based on the light technology of passing through.
7. according to claim 2 or the 3 described single oil sump lubricant pollution of binary channels degree pick-up units, it is characterized in that based on the light technology of passing through, described measurement oil sump (21) in a tubular form and adopting quartz glass process.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012200677634U CN202486054U (en) | 2012-02-28 | 2012-02-28 | Two-channel single-oil-pool lubricating oil pollution degree detection device based on optical transmission technology |
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| CN2012200677634U CN202486054U (en) | 2012-02-28 | 2012-02-28 | Two-channel single-oil-pool lubricating oil pollution degree detection device based on optical transmission technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098373A (en) * | 2020-08-26 | 2020-12-18 | 东风柳州汽车有限公司 | Vehicle lubricating oil detection device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112098373A (en) * | 2020-08-26 | 2020-12-18 | 东风柳州汽车有限公司 | Vehicle lubricating oil detection device and system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121010 Termination date: 20140228 |