CN112285046A - Calibrating device and method for motor vehicle tail gas remote sensing detection system - Google Patents
Calibrating device and method for motor vehicle tail gas remote sensing detection system Download PDFInfo
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- CN112285046A CN112285046A CN202011118545.4A CN202011118545A CN112285046A CN 112285046 A CN112285046 A CN 112285046A CN 202011118545 A CN202011118545 A CN 202011118545A CN 112285046 A CN112285046 A CN 112285046A
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- 238000001514 detection method Methods 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims description 142
- 230000007246 mechanism Effects 0.000 claims description 11
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 238000012795 verification Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
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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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/33—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using ultraviolet light
-
- 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
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
- G01N21/35—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light
- G01N21/3504—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry using infrared light for analysing gases, e.g. multi-gas analysis
Abstract
The invention provides a calibrating device for a motor vehicle tail gas remote sensing detection system and a calibrating method for the motor vehicle tail gas remote sensing detection system using the calibrating device. The calibrating device and the calibrating method avoid the condition that a manufacturer of the remote sensing detection system of the tail gas of the motor vehicle influences the calibrating result through a technical means by a random air inlet mode, and improve the accuracy and the reliability of calibration.
Description
Technical Field
The invention relates to the technical field of environment-friendly verification equipment, in particular to a verification device and a verification method for a remote sensing detection system of motor vehicle tail gas.
Background
The remote sensing detector for detecting tail gas is a measuring device for directly measuring the concentration of the tail gas of the automobile according to the long-distance luminosity change caused by the pollutants in the exhaust gas of the automobile, has the advantage of not influencing the normal running of the automobile, and has the basic working principle that: the main machine of the remote sensing instrument emits a beam of infrared (ultraviolet) light which traverses the road, when the automobile passes through, the spectral intensity and characteristics of the infrared (ultraviolet) light received by the receiving end can change, and the change indicates the concentration of the gas to be measured (such as CO, CO2, HC and NO).
Because the requirement of the tail gas remote sensing detector on the precision is high, in order to guarantee the precision of the tail gas remote sensing detector after installation, the tail gas remote sensing detector needs to be identified after installation and debugging are finished, but the existing calibrating device, such as the Chinese patent with the publication number of CN107748139A, discloses a method and a device for calibrating the tail gas remote sensing detector, which are used for injecting gas with fixed concentration and fixed components into an air chamber according to the national standard, so that equipment manufacturers can adjust the tail gas remote sensing detector pertinently, the method and the device are particularly suitable for gas detection with preset detection standard concentration and components, and even relevant data are directly prestored in the tail gas remote sensing detector, so that the calibrating result is inaccurate.
Disclosure of Invention
Therefore, it is necessary to provide a device and a method for calibrating a remote sensing detection system of a motor vehicle for solving the problem of inaccurate detection result of the existing remote sensing detection device calibration equipment.
The above purpose is realized by the following technical scheme:
the utility model provides a motor vehicle exhaust remote sensing detecting system calibrating installation, includes: the device comprises a random air inlet unit, a main air chamber, a control unit and a display recording unit, wherein the random air inlet unit comprises a plurality of air inlet cylinders, and the air inlet cylinders are connected with the main air chamber through air inlet electromagnetic valves; a gas component sensor and a pressure sensor are arranged in the main gas chamber, the gas component sensor is used for detecting the gas component in the main gas chamber, and the pressure sensor is used for detecting the pressure in the main gas chamber; an air outlet electromagnetic valve is also arranged on the main air chamber; the control unit is used for controlling the opening and closing of the air inlet electromagnetic valve and the air outlet electromagnetic valve, and the display and record unit is used for recording and displaying a detection result of the tail gas remote sensing detection system and a detection result of the gas component sensor.
In one embodiment, a gas flow meter is arranged between the gas inlet cylinder and the main gas chamber.
In one embodiment, the main air chamber is provided with a cover body and an action mechanism, wherein the cover body is arranged at two ends of the main air chamber in a covering mode, and the action mechanism can drive the cover body to close or open the main air chamber so as to shield or make way of a measuring light path.
In one embodiment, the main air chamber comprises a column section and conical sections at two ends of the column section, the cross-sectional dimension of each column section along the direction perpendicular to the measuring light path is the same, and the cross-sectional dimension of each conical section along the direction is gradually reduced along the direction far away from the conical section.
In one embodiment, a transparent cover plate, a light shielding plate and an actuating mechanism are arranged at two ends of the main air chamber, and the actuating mechanism can drive the light shielding plate to shield or expose the transparent cover plate so as to shield or make way of a measuring light path.
In one embodiment, the gas inlet cylinders comprise N gas cylinders from a first gas cylinder to an Nth gas cylinder, N is a positive integer greater than 2, and the gas inlet cylinder contains CO gas and C with preset concentrations3H8Gas, CO2Any one or combination of any several of gas, NO gas and 1, 3-butadiene gas; the gas component sensor comprises O2A gas sensor.
The invention also provides a method for calibrating the motor vehicle exhaust remote sensing detection system, which applies the calibrating device of the motor vehicle exhaust remote sensing detection system in the embodiment and comprises the following steps:
s10, the control unit randomly selects M air inlet cylinders from the N air inlet cylinders, wherein M is a positive integer smaller than N;
s20, the control unit controls the opening of the air inlet electromagnetic valve and charges the main air chamber;
s30, the O2When the gas sensor detects that the oxygen content is less than 0.1%, the control unit closes the air inlet electromagnetic valve;
s40, the gas component sensor detects the gas component in the main gas chamber and sends the detection result to the display and record unit;
s50, the tail gas remote sensing detection system works to detect gas components in the main gas chamber and send the detection result to the display recording unit;
s60, the control unit controls the air outlet electromagnetic valve to be opened and exhausts the gas in the main gas chamber;
s70, executing step S20 to step S60 for 2-4 times in a loop.
The invention has the beneficial effects that:
the invention provides a calibrating device for a motor vehicle tail gas remote sensing detection system and a calibrating method for the motor vehicle tail gas remote sensing detection system using the calibrating device. The calibrating device and the calibrating method avoid the condition that a manufacturer of the remote sensing detection system of the tail gas of the motor vehicle influences the calibrating result through a technical means by a random air inlet mode, and improve the accuracy and the reliability of calibration.
Drawings
Fig. 1 is a schematic structural diagram of a calibrating apparatus for a remote sensing detection system of vehicle exhaust gas according to an embodiment of the present invention, in which solid lines with arrows indicate gas flowing directions, and dotted lines indicate communication connections.
Wherein:
an intake air cylinder 11; a main air chamber 12; an intake solenoid valve 13; an air outlet solenoid valve 14; a gas component sensor 15; a pressure sensor 16; a control unit 17; a display recording unit 18; and a remote vehicle exhaust gas sensing system 19.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below by way of embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The numbering of the components themselves, such as "first", "second", etc., is used herein only to distinguish between the objects depicted and not to have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings). In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
The invention provides a calibrating device of a motor vehicle tail gas remote sensing detection system and a calibrating method of the motor vehicle tail gas remote sensing detection system using the calibrating device, as shown in figure 1, the calibrating device comprises a random air inlet unit, a main air chamber 12, a control unit 17 and a display recording unit 18, wherein the random air inlet unit comprises a plurality of air inlet air cylinders 11, common tail gas with different components is stored in each air inlet air cylinder 11, and the control unit 17 can randomly select part of the air inlet air cylinders 11 to inflate the main air chamber 12 so as to simulate different types of tail gas. The calibrating device and the calibrating method avoid the condition that the manufacturers of the remote sensing detection system 19 of the motor vehicle exhaust influence the calibrating result through a technical means by a random air inlet mode, and improve the accuracy and the reliability of the calibration.
Specifically, the calibrating device for the remote sensing detection system of the tail gas of the motor vehicle comprises: a random air intake unit, a main air chamber 12, a control unit 17, and a display recording unit 18.
The random air inlet unit comprises a plurality of air inlet cylinders 11, any two air inlet cylinders 11 are isolated from each other, an independent communicating pipeline is arranged between each air inlet cylinder 11 and the main air chamber 12, an air inlet electromagnetic valve 13 is arranged on each communicating pipeline, and the air inlet electromagnetic valve 13 on each communicating pipeline can independently control the on-off of the communicating pipeline according to the instruction of the control unit 17.
A gas component sensor 15 and a pressure sensor 16 are provided in the main gas chamber 12, the gas component sensor 15 is for detecting a gas component in the main gas chamber 12, the pressure sensor 16 is for detecting a pressure in the main gas chamber 12, and normally at least O is included in the gas component sensor 152Gas sensor by O2The gas sensor and pressure sensor 16 detects whether the gas inside the main chamber 12 is saturated, and controls the opening of the intake solenoid valve 13 accordingly to adjust the charging speed of the intake gas cylinder 11 into the main chamber 12 and to adjust the operation of other operating components in the verification device. The main chamber 12 is also provided with an outlet solenoid valve 14 for exhausting the gas in the main chamber 12.
The control unit 17 is used for controlling the opening and closing of the air inlet electromagnetic valve 13 and the air outlet electromagnetic valve 14, randomly selecting any number of air inlet air cylinders 11 in the air inlet stage, and randomly generating simulated tail gas in the main air chamber 12 according to the selected number. The display and recording unit 18 is used for recording and displaying the detection result of the remote exhaust gas detection system and the detection result of the gas component sensor 15.
In one embodiment, in order to determine the composition of the simulated gas randomly generated in the main gas chamber 12, a gas flow meter is arranged between each of the gas cylinders 11 and the main gas chamber 12, and the amount of gas flowing into the main gas chamber 12 from the gas cylinders 11 is counted by the gas flow meter and fed back to the control unit 17 and the display and recording unit 18.
In one embodiment, the main chamber 12 is provided with a cover covering both ends of the main chamber 12 and an actuating mechanism capable of driving the cover to close or open the main chamber 12 to shield or clear the measurement light path. In the air intake stage, the main air chamber 12 is made to be a relatively closed cavity by the cover body, air can be only admitted through a communication pipeline between the air inlet gas bottle 11 and the main air chamber 12, after air intake is finished, the air inlet electromagnetic valve 13 is closed, and the cover bodies at two ends of the main air chamber 12 are opened at the moment, so that a measuring beam emitted by the motor vehicle tail gas remote sensing detection system can pass through the main air chamber 12 according to a preset measuring light path, and the simulated tail gas in the main air chamber 12 is detected.
In one embodiment, in order to avoid the simulated exhaust gas in the main air chamber 12 from overflowing too fast when the cover is opened, the main air chamber 12 includes a column section and cone sections at two ends of the column section, the cross-sectional dimensions of the column section in the direction perpendicular to the measuring light path are the same, and the cross-sectional dimensions of the cone sections in the direction are gradually reduced along the direction away from the cone sections. In other words, as an example of the case where the main chamber 12 is circular at all positions perpendicular to the measurement optical path, the central portion of the main chamber 12 can be regarded as a cylinder, the two ends of the main chamber 12 can be regarded as two truncated cones, the diameters of the truncated cones gradually decrease along the direction away from the cylinder, and the cover covers the end face of the truncated cone with the smaller diameter. When the main air chamber 12 is filled with the simulated tail gas and the cover body is opened, the middle size of the main air chamber 12 is large, so that more simulated tail gas can be contained, and meanwhile, the end faces at two ends of the main air chamber 12 are small in size, so that the overflowing speed of the simulated tail gas is small. And when the simulated tail gas in the main air chamber 12 overflows and scatters, the simulated tail gas moves from a position with a larger diameter to a position with a smaller diameter, and also moves from each position in the main air chamber 12 to the axis direction of the main air chamber 12, namely, the simulated tail gas moves from the preset measuring light path, so that the concentration of the simulated tail gas on the measuring light path is always at a uniform level, and the accuracy of a verification result is ensured.
In one embodiment, the main air chamber 12 is provided with a transparent cover plate, a light shielding plate and an actuating mechanism at two ends, and the actuating mechanism can drive the light shielding plate to shield or expose the transparent cover plate so as to shield or make way of the measuring light path.
In one embodiment, the gas inlet cylinders comprise N gas cylinders from a first gas cylinder to an Nth gas cylinder, N is a positive integer greater than 2, and the gas inlet cylinders contain CO gas and C with preset concentrations3H8Gas, CO2Any one or combination of any several of gas, NO gas and 1, 3-butadiene gas; the gas component sensor comprises O2A gas sensor.
The invention also provides a method for calibrating the motor vehicle exhaust remote sensing detection system, which applies the calibrating device of the motor vehicle exhaust remote sensing detection system in the embodiment and comprises the following steps:
s10, the control unit randomly selects M air inlet cylinders from the N air inlet cylinders, wherein M is a positive integer smaller than N;
s20, the control unit controls the opening of the air inlet electromagnetic valve and charges air into the main air chamber;
S30，O2when the gas sensor detects that the oxygen content is less than 0.1%, the control unit closes the air inlet electromagnetic valve;
s40, detecting the gas component in the main gas chamber by the gas component sensor, and sending the detection result to the display recording unit;
s50, the tail gas remote sensing detection system works to detect gas components in the main gas chamber and send the detection result to the display recording unit;
s60, the control unit controls the air outlet electromagnetic valve to open and exhaust the air in the main air chamber;
s70, executing step S20 to step S60 for 2-4 times in a loop.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. The calibrating device for the remote sensing detection system of the tail gas of the motor vehicle is characterized by comprising: the device comprises a random air inlet unit, a main air chamber, a control unit and a display recording unit, wherein the random air inlet unit comprises a plurality of air inlet cylinders, and the air inlet cylinders are connected with the main air chamber through air inlet electromagnetic valves; a gas component sensor and a pressure sensor are arranged in the main gas chamber, the gas component sensor is used for detecting the gas component in the main gas chamber, and the pressure sensor is used for detecting the pressure in the main gas chamber; an air outlet electromagnetic valve is also arranged on the main air chamber; the control unit is used for controlling the opening and closing of the air inlet electromagnetic valve and the air outlet electromagnetic valve, and the display and record unit is used for recording and displaying a detection result of the tail gas remote sensing detection system and a detection result of the gas component sensor.
2. The calibrating device for remote sensing system of motor vehicle exhaust according to claim 1, wherein a gas flow meter is arranged between the gas inlet cylinder and the main gas chamber.
3. The calibrating apparatus for remote sensing system of motor vehicle exhaust according to claim 1, wherein the main air chamber is provided with a cover body covering two ends of the main air chamber and an actuating mechanism, and the actuating mechanism can drive the cover body to close or open the main air chamber to shield or leave out the measuring light path.
4. The calibrating device for the remote vehicle exhaust gas sensing system according to claim 3, wherein the main air chamber comprises a column section and conical sections at two ends of the column section, the cross-sectional dimension of each column section along a direction perpendicular to the measuring light path is the same, and the cross-sectional dimension of each conical section along the direction is gradually reduced along a direction far away from the conical section.
5. The calibrating device for the remote sensing detection system of motor vehicle exhaust according to claim 1, wherein a transparent cover plate, a light shielding plate and an actuating mechanism are arranged at two ends of the main air chamber, and the actuating mechanism can drive the light shielding plate to shield or expose the transparent cover plate so as to shield or give way a measuring light path.
6. The calibrating device for remote sensing system of motor vehicle exhaust according to any one of claims 1-5, wherein the air inlet cylinders comprise a first cylinder to an Nth cylinderN gas cylinders are provided, N is a positive integer greater than 2, and the gas inlet cylinder is filled with CO gas and C with preset concentrations3H8Gas, CO2Any one or combination of any several of gas, NO gas and 1, 3-butadiene gas; the gas component sensor comprises O2A gas sensor.
7. A method for calibrating a remote vehicle exhaust gas detection system, which is characterized by applying the calibrating device of the remote vehicle exhaust gas detection system according to claim 6 and comprising the following steps:
s10, the control unit randomly selects M air inlet cylinders from the N air inlet cylinders, wherein M is a positive integer smaller than N;
s20, the control unit controls the opening of the air inlet electromagnetic valve and charges the main air chamber;
s30, the O2When the gas sensor detects that the oxygen content is less than 0.1%, the control unit closes the air inlet electromagnetic valve;
s40, the gas component sensor detects the gas component in the main gas chamber and sends the detection result to the display and record unit;
s50, the tail gas remote sensing detection system works to detect gas components in the main gas chamber and send the detection result to the display recording unit;
s60, the control unit controls the air outlet electromagnetic valve to be opened and exhausts the gas in the main gas chamber;
s70, executing step S20 to step S60 for 2-4 times in a loop.
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| CN202011118545.4A CN112285046A (en) | 2020-10-19 | 2020-10-19 | Calibrating device and method for motor vehicle tail gas remote sensing detection system |
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| CN202011118545.4A CN112285046A (en) | 2020-10-19 | 2020-10-19 | Calibrating device and method for motor vehicle tail gas remote sensing detection system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113311114A (en) * | 2021-05-27 | 2021-08-27 | 河南省计量科学研究院 | Mobile calibration detection system of tail gas remote measuring device |
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