CN108037099A - A kind of method using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness - Google Patents
A kind of method using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness Download PDFInfo
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- CN108037099A CN108037099A CN201711260257.0A CN201711260257A CN108037099A CN 108037099 A CN108037099 A CN 108037099A CN 201711260257 A CN201711260257 A CN 201711260257A CN 108037099 A CN108037099 A CN 108037099A
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- 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
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Abstract
The present invention relates to a kind of method using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is characterised in that the described method includes：S1, optimization measurement background, reduces the interference of background near the ground and motorcar body background to measurement result；S2, adjusts intensity of illumination so that the background value of photoelectricity smoke gauge is in the measurement range of the photoelectricity smoke gauge；S3, sets photoelectricity smoke gauge so that the distance of photoelectricity smoke gauge and automobile exhausting mouth is 10 50m；S4, adjusts the area of observation coverage of photoelectricity smoke gauge so that the area of observation coverage alignment background board of photoelectricity smoke gauge；S5, starts motor vehicle and photoelectricity smoke gauge, measures the lingemann blackness of the tail gas of vehicular emission.Photoelectricity smoke gauge is used in the lingemann blackness measurement of motor-vehicle tail-gas by it, there is provided the accuracy of motor-vehicle tail-gas lingemann blackness measurement.
Description
Technical field
Motor-vehicle tail-gas fields of measurement of the present invention, and in particular to one kind utilizes photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness
Method.
Background technology
Photoelectricity smoke gauge method is mainly used in the industrial tail gas blackness (lingemann blackness) of measurement industrial vent stack, it is surveyed
Need to carry out background measurement (background value of measured zone and dark value) during amount, the blackness of tail gas is calculated by cutting down background value, because
This, background and intensity of illumination are an important factor for influencing tail gas light transmittance, to be whether photoelectricity smoke gauge measurement result accurately closes
Key.When measuring the industrial tail gas blackness of industrial vent stack, using sky as background, background is relatively easy for it, can be more accurate
Measurement industrial tail gas blackness.
But if using it for motor-vehicle tail-gas measurement, due to the exhaust open height of motor vehicle relatively low (from the ground only 20
~40CM), poor as background reflection light ability using ground or vehicle body, dark, disturbing factor is more, and background measurement is difficult to reach
To preferable level, it is difficult the accurate light transmittance for calculating motor vehicle discharged tail gas to cause ordinary circumstance photoelectricity smoke gauge.Therefore, it is existing
There is photoelectricity smoke gauge method to be difficult to accurate measurement motor-vehicle tail-gas blackness.
The content of the invention
In consideration of it, the present invention provides a kind of method using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, which overcome
The exhaust open height of motor vehicle is relatively low, using ground or vehicle body as background reflection light ability poor, dark, disturbing factor
More, background measurement is difficult to reach preferable level, and it is difficult the accurate printing opacity for calculating motor vehicle discharged tail gas to cause photoelectricity smoke gauge
Photoelectricity smoke gauge method, is used for the lingemann blackness for accurately measuring motor-vehicle tail-gas by the defects of rate.
The present invention provides a kind of method using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, the described method includes：
S1, optimization measurement background, reduces the interference of background near the ground and motorcar body background to measurement result；
S2, adjusts intensity of illumination so that the background value of photoelectricity smoke gauge is in the measurement range of the photoelectricity smoke gauge；
S3, sets photoelectricity smoke gauge so that the distance of photoelectricity smoke gauge and automobile exhausting mouth is 10-50m；
S4, adjusts the area of observation coverage of photoelectricity smoke gauge so that the area of observation coverage alignment background board of photoelectricity smoke gauge；
S5, starts motor vehicle and photoelectricity smoke gauge, measures the lingemann blackness of the tail gas of vehicular emission.
Preferably, the optimization measurement background, reduces background near the ground and motorcar body background does measurement result
Disturb, specifically include：
S11, sets the background board with reflecting properties, and the interference of motor-vehicle tail-gas blackness is faced to avoid ground；
S12, makes the camera lens of photoelectricity smoke gauge be basically perpendicular to the discharge directions of tail gas, and is basically parallel to ground.
Preferably, the interference that the background board with reflecting properties is set, motor-vehicle tail-gas blackness is faced to avoid ground
Specially：Background board with reflecting properties is set at automobile exhausting mouth direction 1-3m, and avoid the panel of background board with
Motor-vehicle tail-gas contacts.
Preferably, the interference that the background board with reflecting properties is set, motor-vehicle tail-gas blackness is faced to avoid ground
Specially：Background board with reflecting properties is set at automobile exhausting mouth direction 2m, and avoids the panel and machine of background board
Motor-car tail gas contacts.
Preferably, the camera lens for making photoelectricity smoke gauge is basically perpendicular to the discharge directions of tail gas, and is basically parallel to ground
Face, specifically includes：If the exhaust outlet of motor vehicle is put down substantially towards side, lens direction and the motorcar body of photoelectricity smoke gauge
OK, and it is basically parallel to ground；If the exhaust outlet of motor vehicle is towards rear, lens direction and the motor vehicle car of photoelectricity smoke gauge
Body is substantially vertical, and is basically parallel to ground.
Preferably, the camera lens for making photoelectricity smoke gauge is basically perpendicular to the discharge directions of tail gas, and is basically parallel to ground
Face, specifically further includes：If the exhaust outlet of motor vehicle can install smoke guide pipe additional by tail gas with horizontal direction towards ground in exhaust outlet
Discharge.
Preferably, the lens direction of the photoelectricity smoke gauge and the smoke pipe tail gas discharge direction of drawing are substantially vertical, and base
This is parallel to ground.
Preferably, the adjustment intensity of illumination so that the background value of photoelectricity smoke gauge is in the measurement of the photoelectricity smoke gauge
In the range of, specifically include：
S21, background board on one side set light compensating lamp so that the background value of photoelectricity smoke gauge is in the survey of the photoelectricity smoke gauge
In the range of amount；
S22, adjustment background board angle so that the background value of photoelectricity smoke gauge is in the measurement range of the photoelectricity smoke gauge
It is interior.
Preferably, the background board and the angle of level ground are 45 ° -90 °.
Preferably, the distance of the photoelectricity smoke gauge and automobile exhausting mouth is 15-35m.
Compared with prior art, the present invention by set background board, adjust background board angle, add light compensating lamp, adjustment
The relative position of photoelectricity smoke gauge camera lens and motor vehicle, so as to overcome because automobile surrounding environment complexity is unsuitable for passing through photoelectricity
Smoke gauge measures the defects of lingemann blackness so that the Ringelman that photoelectricity smoke gauge also can be used in measuring motor-vehicle tail-gas is black
Degree.The measurement efficiency of lingemann blackness is improved, adds the applicable scene of photoelectricity smoke gauge.
Brief description of the drawings
Fig. 1 is the flow diagram of the lingemann blackness measuring method of present pre-ferred embodiments.
When Fig. 2 is that automobile exhausting mouth is located at side, photoelectricity smoke gauge, motor vehicle, the relative position schematic diagram of background board.
When Fig. 3 is that automobile exhausting mouth is located behind, photoelectricity smoke gauge, motor vehicle, the relative position schematic diagram of background board.
Fig. 4 is background board and light compensating lamp and the location diagram on ground.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with attached drawing and specific implementation
Example, is described in further detail the present invention.It should be appreciated that specific embodiment described herein is only to explain the present invention,
It is not intended to limit the present invention.
Referring to Fig. 1-3, the method using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness of present pre-ferred embodiments, tool
Body includes：
S1, optimization measurement background, reduces the interference of background near the ground and motorcar body background to measurement result.Specifically
Including：
S11, sets the background board with reflecting properties, and the interference of motor-vehicle tail-gas blackness is faced to avoid ground.Specifically,
Background board with reflecting properties is set at automobile exhausting mouth direction 1-3m, and the panel of background board should avoid and motor-driven vehicle
Gas contacts, and prevents motor-vehicle tail-gas from forming flue gas group after getting to background board, disturbs the light transmittance of tail gas, the reflecting surface of the background board
Towards the camera lens of photoelectricity smoke gauge.For motor-vehicle tail-gas after the diffusion of certain distance, blackness is more obvious, so can be more preferable
Detection black smoke concentration.Background board is smooth, reflecting properties are good, bottom surface color requirement light color, and in the present embodiment, background board is
The reflecting plate of photographic goods, color are approached with sky, size 80*80cm.In a preferred embodiment, in automobile exhausting mouth
Background board with reflecting properties is set at the 2m of direction, the reflecting surface of the background board towards photoelectricity smoke gauge camera lens, at this time
Measurement effect is best.
S12, makes the camera lens of photoelectricity smoke gauge be basically perpendicular to the discharge directions of tail gas, and is basically parallel to ground.Avoid
Influence of the motorcar body to tail gas light transmittance.
In a specific embodiment, if the exhaust outlet of motor vehicle is towards side, as shown in Fig. 2, the mirror of photoelectricity smoke gauge
Head direction is substantially parallel with motorcar body, and is basically parallel to ground；As shown in figure 3, if the exhaust outlet of motor vehicle is after
Side, then the lens direction of photoelectricity smoke gauge and motorcar body are substantially vertical, and are basically parallel to ground.
In another embodiment, if the exhaust outlet of motor vehicle can install smoke guide pipe additional by flue gas towards ground in exhaust outlet
Discharged with horizontal direction, it is preferable that smoke guide pipe caliber size is suitable with exhaust outlet bore.The lens direction of photoelectricity smoke gauge at this time
It is substantially vertical with drawing smoke pipe tail gas discharge direction, and it is basically parallel to ground.
S2, adjusts intensity of illumination so that the background value of photoelectricity smoke gauge is in the measurement range of the photoelectricity smoke gauge.
S21, background board on one side set light compensating lamp so that the background value of photoelectricity smoke gauge is in the survey of the photoelectricity smoke gauge
In the range of amount.
Specifically, when outdoor measurement place dark or be disposed in the interior measures, light compensating lamp adjustment can be added and surveyed
The brightness in place is measured, light compensating lamp should be set beside background board, and light should be radiated on background board.
S22, adjustment background board angle so that the background value of photoelectricity smoke gauge is in the measurement range of the photoelectricity smoke gauge
It is interior.In better embodiment of the present invention, as shown in figure 4, background board and the angle of level ground are 45 ° -90 °, photoelectric measuring cigarette
The measurement effect of instrument is best.
S3, sets photoelectricity smoke gauge so that the distance D of photoelectricity smoke gauge and automobile exhausting mouth is 10-50m.More preferably
Ground, photoelectricity smoke gauge and the distance D of automobile exhausting mouth are 15-35m.When photoelectricity smoke gauge and the distance D of automobile exhausting mouth
During more than 50m, then electronic shooting system will can't detect the lingemann blackness of motor-vehicle tail-gas.Equally, when photoelectricity smoke gauge with
When the distance D of automobile exhausting mouth is less than 10m, electronic shooting system also can't detect the lingemann blackness of motor-vehicle tail-gas.
S4, adjusts the area of observation coverage of photoelectricity smoke gauge so that the area of observation coverage alignment background board of photoelectricity smoke gauge.
S5, starts motor vehicle and photoelectricity smoke gauge, measures the lingemann blackness of the tail gas of vehicular emission.Photoelectricity smoke gauge
The image of tail gas is collected using optical system, light transmittance and the standard lingemann blackness plate inside photoelectricity smoke gauge of tail gas
Light transmittance is compared, and is handled by optical system, and optical signal is become electric signal output, has display system to show tail gas
Lingemann blackness.Lingemann blackness grade is divided into 6 grades, and respectively from 0 to 5 grade, specific classification situation is as shown in table 1：
1 lingemann blackness grade of table is classified situation
| Grade | Blackness ratio (%) |
| 0 | 0-19 |
| 1 | 20-39 |
| 2 | 40-59 |
| 3 | 60-79 |
| 4 | 80-99 |
| 5 | It is completely black |
The present invention lingemann blackness measuring method, by set background board, adjust background board angle, add light filling
The relative position of lamp, adjustment photoelectricity smoke gauge camera lens and motor vehicle, so as to overcome because automobile surrounding environment complexity is unsuitable for
The defects of lingemann blackness is measured by photoelectricity smoke gauge so that photoelectricity smoke gauge also can be used in measuring the woods of motor-vehicle tail-gas
The graceful blackness of lattice.The measurement efficiency of lingemann blackness is improved, adds the applicable scene of photoelectricity smoke gauge.
The above is only some embodiments of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
- A kind of 1. method using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is characterised in that the described method includes：S1, optimization measurement background, reduces the interference of background near the ground and motorcar body background to measurement result；S2, adjusts intensity of illumination so that the background value of photoelectricity smoke gauge is in the measurement range of the photoelectricity smoke gauge；S3, sets photoelectricity smoke gauge so that the distance of photoelectricity smoke gauge and automobile exhausting mouth is 10-50m；S4, adjusts the area of observation coverage of photoelectricity smoke gauge so that the area of observation coverage alignment background board of photoelectricity smoke gauge；S5, starts motor vehicle and photoelectricity smoke gauge, measures the lingemann blackness of the tail gas of vehicular emission.
- 2. the method according to claim 1 using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is characterised in that institute Optimization measurement background is stated, the interference of background near the ground and motorcar body background to measurement result is reduced, specifically includes：S11, sets the background board with reflecting properties, and the interference of motor-vehicle tail-gas blackness is faced to avoid ground；S12, makes the camera lens of photoelectricity smoke gauge be basically perpendicular to the discharge directions of tail gas, and is basically parallel to ground.
- 3. the method according to claim 2 using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is characterised in that institute State and the background board with reflecting properties is set, be specially to avoid interference of the ground in face of motor-vehicle tail-gas blackness：Arranged in motor vehicle Background board with reflecting properties is set at the 1-3m of gas port direction, and avoids the panel of background board from being contacted with motor-vehicle tail-gas.
- 4. the method according to claim 2 using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is characterised in that institute State and the background board with reflecting properties is set, be specially to avoid interference of the ground in face of motor-vehicle tail-gas blackness：Arranged in motor vehicle Background board with reflecting properties is set at the 2m of gas port direction, and avoids the panel of background board from being contacted with motor-vehicle tail-gas.
- 5. the method according to claim 2 using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is characterised in that institute Stating makes the camera lens of photoelectricity smoke gauge be basically perpendicular to the discharge directions of tail gas, and is basically parallel to ground, specifically includes：It is if motor-driven For the exhaust outlet of car towards side, then the lens direction of photoelectricity smoke gauge is substantially parallel with motorcar body, and is basically parallel to ground Face；If the exhaust outlet of motor vehicle, towards rear, the lens direction and motorcar body of photoelectricity smoke gauge are substantially vertical, and substantially Parallel to ground.
- 6. the method according to claim 5 using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is characterised in that institute Stating makes the camera lens of photoelectricity smoke gauge be basically perpendicular to the discharge directions of tail gas, and is basically parallel to ground, specifically further includes：If machine The exhaust outlet of motor-car then can be installed additional smoke guide pipe in exhaust outlet and be discharged tail gas with horizontal direction towards ground.
- 7. the method according to claim 6 using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is characterised in that institute It is substantially vertical to state lens direction and the smoke pipe tail gas discharge direction of drawing of photoelectricity smoke gauge, and is basically parallel to ground.
- 8. the method according to claim 1 using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is characterised in that institute State adjustment intensity of illumination so that the background value of photoelectricity smoke gauge is in the measurement range of the photoelectricity smoke gauge, is specifically included：S21, background board on one side set light compensating lamp so that the background value of photoelectricity smoke gauge is in the measurement model of the photoelectricity smoke gauge In enclosing；S22, adjustment background board angle so that the background value of photoelectricity smoke gauge is in the measurement range of the photoelectricity smoke gauge.
- 9. the method according to claim 8 using photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is characterised in that institute The angle for stating background board and level ground is 45 ° -90 °.
- 10. according to claim 1-9 any one of them using the method for photoelectricity smoke gauge measurement motor-vehicle tail-gas blackness, it is special Sign is that the distance of the photoelectricity smoke gauge and automobile exhausting mouth is 15-35m.
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| CN201711260257.0A CN108037099B (en) | 2017-12-04 | 2017-12-04 | Method for measuring blackness of motor vehicle exhaust by using photoelectric smoke detector |
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