CN101839853B - Gas detecting instrument and filter device - Google Patents
Gas detecting instrument and filter device Download PDFInfo
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- CN101839853B CN101839853B CN 201010175832 CN201010175832A CN101839853B CN 101839853 B CN101839853 B CN 101839853B CN 201010175832 CN201010175832 CN 201010175832 CN 201010175832 A CN201010175832 A CN 201010175832A CN 101839853 B CN101839853 B CN 101839853B
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Abstract
The embodiment of the invention discloses a gas detecting instrument and a filter device with low cost. The above gas detecting instrument comprises a light source, a detector and a filter device, wherein the filter device comprises an optical filter wheel, a plurality of groups of optical filters and a motor, wherein the optical filters are arranged on the optical filter wheel, and the motor controls the optical filters to rotate; any optical filter group comprises a reference optical filter and a detection optical filter, the plane on which any optical filter is arranged is vertical to the rotary surface of the optical filter wheel; when being used, one of the light source and detector can be arranged in the optical filter wheel, the other one is arranged outside the optical filter wheel, and the detector is arranged on a light propagation path. The embodiment of the invention is characterized in that the optical filter wheel of the filter device is provided with a plurality of groups of optical filters; when the motor rotates for one circle, the detector can detect a plurality of groups of tail gas, so that the revolving speed of the motor can be relatively lower, and cost thereof is lower than the cost of the motor with high revolving speed so as to lower the cost of the filter device, even the cost of the whole gas detecting instrument.
Description
Technical field
The present invention relates to electronic device field, more particularly, relate to gas detecting instrument and filtering apparatus.
Background technology
Along with the fast development of social economy and urbanization process, motor vehicle quantity constantly increases, and its exhaust emissions amount also grows with each passing day.Major pollutants in the motor-vehicle tail-gas comprise carbon monoxide (CO) gas, carbon dioxide (CO
2) gas, propane gas etc., these pollutants have caused severe contamination to atmospheric environment.For this reason, each large-and-medium size cities is provided with system for remote exhaust emission measurement on road, carries out fast detecting with the above-mentioned three kinds of gases that the travels down automobile discharged in the tail gas, and will detect data upload and carry out scientific management to make things convenient for environmental protection, vehicle supervision department.
The general using gases detection instrument of above-mentioned system for remote exhaust emission measurement is realized carbon monoxide CO, CO
2, three kinds of gases such as propane fast detecting.Traditional gas detecting instrument comprises light source, detector and filtering apparatus; The motor that filtering apparatus wherein comprises the optical filter dish again, is arranged at the optical filter on the optical filter dish and controls the optical filter disc spins; Optical filter then can be divided into reference to optical filter and detection optical filter; Wherein, detect optical filter and can be subdivided into CO optical filter, CO again
2Optical filter and propane optical filter.When detecting, driven by motor optical filter dish and optical filter rotation, light source and detector are divided into optical filter dish both sides, and the light signal that light emitted goes out passes through tail gas and after optical filter filters, can be received by detector.Optical filter spirals and circles, and detector can receive respectively through with reference to optical filter, CO optical filter, CO
2One group of light signal that optical filter and propane optical filter filter, detector carries out analyzing and processing to above-mentioned one group of light signal can draw CO, CO
2, propane testing result.
Yet in the process that embodiment of the present invention is created, the inventor finds that when a certain automobile to travels down carried out the tail gas detection, in order to improve accuracy of detection, detector need carry out tens groups of detections usually.When using traditional gas detecting instrument to detect, motor (optical filter dish) rotates a circle, and detecting device can only draw one group of testing result, also is that motor need change the tail gas detection that could accomplish in tens weeks a certain automobile.It is very fast to add automobile driving speed, and in order the accurate fast of its discharging tail gas to be detected through accomplishing in the process of gas detecting instrument at automobile, motor needs high speed rotating.And rotating speed is high more, and the price of motor is just more expensive, and then causes the cost of filtering apparatus and even whole gas detecting instrument high.
Summary of the invention
In view of this, the embodiment of the invention provides lower-cost gas detecting instrument and filtering apparatus.
To achieve these goals, the embodiment of the invention provides following scheme:
A kind of gas detecting instrument; Comprise light source, detector and filtering apparatus; Be used for CO gas, carbon dioxide, the propane gas of travels down tail gas that automobile discharges are carried out quick remote measurement, said filtering apparatus comprises optical filter wheel, is arranged at the many groups filter set on the said optical filter wheel and controls said optical filter wheel motor rotating that said motor whenever rotates a circle; Said detector can be accomplished many group tail gas and detect; Wherein, arbitrary filter set comprises that with reference to optical filter, carbon monoxide optical filter, carbon dioxide optical filter and propane optical filter the surfaces of revolution of said arbitrary optical filter plane, place and said optical filter wheel is perpendicular;
In use, any inside that is placed in said optical filter wheel in said light source and the detector, another is placed in the outside of said optical filter wheel, and said detector is positioned on the propagation path of light of the light signal that said light source sends.
Preferably, the said optical filter wheel connecting portion and the main shaft that comprise the chassis and be divided into both sides, said chassis;
Said optical filter is connected with said chassis is vertical through said connecting portion;
Said main shaft one end is connected with said chassis is vertical, and the other end is connected with the output terminal of said motor.
Preferably, said motor is specially servomotor.
Preferably, on the propagation path of light between said light source and the detector, also be disposed with collimating mirror, reverberator and condenser.
A kind of filtering apparatus; Be used for CO gas, carbon dioxide, the propane gas of travels down tail gas that automobile discharges are carried out quick remote measurement; Said filtering apparatus comprises optical filter wheel, is arranged at the many groups filter set on the said optical filter wheel and controls said optical filter wheel motor rotating; Said motor whenever rotates a circle, and the inside or the outside detector that are placed in said optical filter wheel can be accomplished the detection of many group tail gas, wherein; Arbitrary filter set comprises that with reference to optical filter, carbon monoxide optical filter, carbon dioxide optical filter and propane optical filter the surfaces of revolution of said arbitrary optical filter plane, place and said optical filter wheel is perpendicular.
Preferably, the said optical filter wheel connecting portion and the main shaft that comprise the chassis and be divided into both sides, said chassis; Said optical filter is connected with said chassis is vertical through said connecting portion; Said main shaft one end is connected with said chassis is vertical, and the other end is connected with the output terminal of said motor.
Preferably, said motor is specially servomotor.
Can find out that from above-mentioned technical scheme in embodiments of the present invention, the optical filter wheel of filtering apparatus is provided with many group filter set, motor whenever rotates a circle, and detector can be accomplished many group tail gas and detect.Rotate a circle with traditional motor, detector accomplishes one group of tail gas only and detects and compare; When need are accomplished the detection of as much group in the identical time; All numbers of the required rotation of motor in the gas detecting instrument of the embodiment of the invention will obviously be less than all numbers of the required rotation of motor in traditional gas detecting instrument; Also promptly in embodiments of the present invention; Rotating speed of motor can be relatively low, so its cost also is lower than the cost of the high motor of rotating speed, thereby reduced the cost of filtering apparatus and even whole gas detecting instrument.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of traditional gas detecting instrument;
Fig. 2 is the gas detecting instrument structural representation that the embodiment of the invention provided;
Fig. 3 is another structural representation of gas detecting instrument that the embodiment of the invention provided;
Fig. 4 is the filtering apparatus structural representation that the embodiment of the invention provided;
Fig. 5 is another structural representation of filtering apparatus structure that the embodiment of the invention provided;
Fig. 6 is the another structural representation of filtering apparatus structure that the embodiment of the invention provided;
Fig. 7 is the another structural representation of gas detecting instrument that the embodiment of the invention provided.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Referring to Fig. 1, traditional gas detecting instrument generally comprises light source 1, detector 2 and filtering apparatus, and filtering apparatus wherein comprises optical filter dish 3, is arranged at optical filter and control optical filter dish 3 motor rotating 4 on the optical filter dish 3; Optical filter is divided into reference to optical filter 5 and detection optical filter, can be subdivided into CO optical filter 6, CO and detect optical filter
2 Optical filter 7 and propane optical filter 8.When detecting, motor 4 drives optical filter dish 3 and optical filter rotation, and light source 1 is divided into optical filter dish 3 both sides with detector 2, and the light signal that light source 1 is launched passes through tail gas and after optical filter filters, can be received by detector 2.Optical filter dish 3 rotates a circle, and detector 2 can receive respectively through with reference to optical filter 5, CO optical filter 6, CO
2One group of light signal of optical filter 7 and 8 filtrations of propane optical filter, 2 pairs of above-mentioned one group of light signals of detector carry out analyzing and processing and can draw CO, CO
2, propane testing result.
When a certain automobile to travels down carries out the tail gas detection; In order to improve accuracy of detection; Detector 2 need carry out tens groups of detections usually; And motor 4 (optical filter dish 3) rotates a circle and can only draw one group of testing result and come, and also is that motor 4 needs to change the tail gas detections that could accomplish in tens weeks a certain automobile.It is very fast to add automobile driving speed, and in order when automobile passes through gas detecting instrument, to accomplish the accurate detection to its tail gas that discharges, motor 4 needs high speed rotating.And rotating speed is high more, and the price of motor 4 is just more expensive, and then causes the cost of filtering apparatus and even whole gas detecting instrument high.Simultaneously too high rotating speed all is very disadvantageous to physical construction and security.
In view of this, the invention provides lower-cost gas detecting instrument.
Fig. 2 shows a kind of structure of above-mentioned gas detection instrument; The structure similar of the traditional gas detecting instrument shown in this gas detecting instrument and Fig. 1; Different is; The optical filter dish 3 of filtering apparatus is provided with many group filter set, wherein comprises with reference to optical filter 5 and detection optical filter in arbitrary group of filter set, is subdivided into CO optical filter 6, CO and detect in the optical filter
2 Optical filter 7 and propane optical filter 8.
It is thus clear that; In the present embodiment, the optical filter dish of filtering apparatus is provided with many group filter set, when motor 4 circles; Detector 2 can be collected many group light signals and accomplish how the group tail gas detect; Accomplish one group of tail gas only and detect and compare with traditional motor detector that rotates a circle, when need were accomplished the detection of as much group in the identical time, all numbers of the motor 4 required rotations in the gas detecting instrument of present embodiment will obviously be less than all numbers of the required rotation of motor in traditional gas detecting instrument; Also in the present embodiment promptly; The rotating speed of motor 4 can be relatively low, so its cost also is lower than the cost of the high motor of rotating speed, thereby reduced the cost of filtering apparatus and even whole gas detecting instrument.
It should be noted that; When stating gas detecting instrument in the use road tail gas being detected, light source 1 is located at road one side, and detector 2 is located at the road opposite side with filtering apparatus; And the optical filter dish in the filtering apparatus 3 needs vertically to place, and the motor 4 that is attached thereto is horizontal positioned then.Certainly, in other application scenarioss, but also horizontal positioned of optical filter dish 3, the motor 4 that is attached thereto is then vertically placed, and does not give unnecessary details at this.
The embodiment of the invention also provides the gas detecting instrument with another kind of structure; See also Fig. 3-4, this gas detecting instrument comprises light source 1, detector 2 and filtering apparatus, and this filtering apparatus comprises optical filter wheel 31, is arranged at many groups filter set and control optical filter wheel 31 motor rotating 4 on the optical filter wheel 31; Wherein, Arbitrary filter set comprises that with reference to optical filter 5 and detection optical filter, in the present embodiment, the detection optical filter comprises CO optical filter 6, CO
2 Optical filter 7 and propane optical filter 8, the surfaces of revolution of above-mentioned arbitrary optical filter plane, place and optical filter wheel 31 is perpendicular;
In the present embodiment, when the using gases detection instrument, detector 2 is unsettled to be placed in the inside of optical filter wheel 31 and to be positioned on the propagation path of light of the light signal that light source 1 sends.Gas detecting instrument in using present embodiment carries out motor-vehicle tail-gas when detecting, and detector 2 is placed in a side of road with optical filter wheel 31, and light source 1 then is placed in the outside of optical filter wheel 31 and is positioned at the opposite side of road.Certainly, in other embodiment of the present invention, if change detecting optical filter, gas detecting instrument can also be used to detect the gas of other kinds, is not limited in the detection of vehicle exhaust.For example also can each gas componant in room air or the mixed gas be detected.At this moment; Light source 1 also can be placed in the inside of optical filter wheel 31, and detector 2 is placed in the outside of optical filter wheel 31, is positioned on the propagation path of light of the light signal that light source 1 sends as long as guarantee detector 2; Light signal passes gas to be detected, after the filtration of optical filter, can be received by detector 2 to get final product.
Gas detecting instrument among above-mentioned all embodiment is all based on a principle: different gas can absorb the infrared ray or the ultraviolet ray of specific wavelength section.With CO optical filter 6 is example, and CO optical filter 6 corresponding centre wavelengths are that CO can light absorbing central wavelength lambda
1, when light signal passed motor-vehicle tail-gas, the CO in the tail gas can be λ to centre wavelength
1Light absorb, and absorption intensity is relevant with the concentration of CO.After CO absorbed, in light signal, centre wavelength was λ
1The intensity of light wave will reduce.Incide 6 last times of CO optical filter at light signal, having only centre wavelength is λ
1Light wave can see through CO optical filter 6 and incide on the detector 2.In like manner, other detection optical filters also only allow the light wave of specific wavelength to pass.After collecting one group of light signal, detector 2 can go out CO, CO according to the various computing of each band strength in the light signal
2And the concentration of propane.Owing to contain hundreds of pollutant in the motor vehicle emission tail gas, other pollutants such as dust possibly impact the degree of accuracy that gas detecting instrument detects.Present embodiment application reference optical filter 5 provides reference optical signal for detector 2, so that detector 2 detects according to reference optical signal and other light signals more accurately.
In other embodiment of the present invention, referring to Fig. 5, the optical filter wheel in the gas detecting instrument illustrated in fig. 3 can be following structure:
A plurality of connecting portions 33 and main shaft 34 that optical filter wheel comprises chassis 32 and is divided into 32 both sides, chassis; Each optical filter passes through a junction 33 and 32 vertical connections of chassis, and separate between the connecting portion 33; Main shaft 34 1 ends and 32 vertical connections of chassis, the other end is connected with the output terminal of motor 4.
In the present embodiment, drive during motor 4 rotation chassis 32 and on connecting portion 33 horizontally rotate with optical filter because motor 4 is vertically placed, its gravity direction and its axial direction are consistent.And when motor 4 horizontal positioned, the gravity direction of motor 4 is unfavorable for motor 4 long-term high speed stable operations like this perpendicular to its axial direction.
In other embodiment of the present invention; The structure of optical filter wheel also can be as shown in Figure 6 in the foregoing description: connecting portion 33 is a ring texture; And be fixedly connected with the edge on chassis 32, connecting portion 33 is provided with the mounting hole 35 suitable with the optical filter shape, and optical filter promptly is installed in the mounting hole 35.
In other embodiment of the present invention,, on the propagation path of light between light source 1 and the detector 2 (the detector 2 unsettled inside that are placed in optical filter wheel), also can be disposed with collimating mirror 9, reverberator 10 and condenser 11 referring to Fig. 7.Wherein, light source 1 is positioned at homonymy with detector 2, and the light signal that light source 1 sends at first is transmitted on the reverberator 10 through passing gas 12 to be measured behind collimating mirror 9 collimations; Reverberator 10 is made up of two level crossings that are oppositely arranged; Can carry out secondary reflection to light signal, the light signal that finally reflects and its exit direction parallel, subsequently; Optical signals condenser 11 through secondary reflection converges, and after optical filter filters, is received by detector 2.Because in the present embodiment, gas to be measured 12 is passed by light signal for twice and can carry out secondary to it and absorb, and therefore, the Strength Changes that is absorbed wave band in the light signal is more obvious, the detection of the detector 2 of being more convenient for.
More than motor among all embodiment specifically can be alternating current generator or servomotor, and be good with the latter.Servomotor has characteristics such as controllable rotation speed, degree of accuracy height, and in the specific implementation, the rotating speed of the response time that can need according to gas detection to servomotor is provided with and chooses detector.With the response time to each light signal be 2 * 10
-3S (also being 2ms) is an example, and can be provided with this moment to the rotating speed of servomotor, to reach every effect of switching an optical filter at a distance from 2ms.
Filtering apparatus among above-mentioned all embodiment is also in protection scope of the present invention.
Each embodiment adopts the mode of going forward one by one to describe in this instructions, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (7)
1. gas detecting instrument; Comprise light source, detector and filtering apparatus; It is characterized in that; Be used for CO gas, carbon dioxide, the propane gas of travels down tail gas that automobile discharges are carried out quick remote measurement, said filtering apparatus comprises optical filter wheel, is arranged at the many groups filter set on the said optical filter wheel and controls said optical filter wheel motor rotating that said motor whenever rotates a circle; Said detector can be accomplished many group tail gas and detect; Wherein, arbitrary filter set comprises that with reference to optical filter, carbon monoxide optical filter, carbon dioxide optical filter and propane optical filter the surfaces of revolution of said arbitrary optical filter plane, place and said optical filter wheel is perpendicular;
In use, any inside that is placed in said optical filter wheel in said light source and the detector, another is placed in the outside of said optical filter wheel, and said detector is positioned on the propagation path of light of the light signal that said light source sends.
2. gas detecting instrument as claimed in claim 1 is characterized in that, connecting portion and main shaft that said optical filter wheel comprises the chassis and is divided into both sides, said chassis;
Said optical filter is connected with said chassis is vertical through said connecting portion;
Said main shaft one end is connected with said chassis is vertical, and the other end is connected with the output terminal of said motor.
3. gas detecting instrument as claimed in claim 2 is characterized in that said motor is specially servomotor.
4. like each described gas detecting instrument of claim 1-3, it is characterized in that, on the propagation path of light between said light source and the detector, also be disposed with collimating mirror, reverberator and condenser.
5. filtering apparatus; It is characterized in that; Be used for CO gas, carbon dioxide, the propane gas of travels down tail gas that automobile discharges are carried out quick remote measurement; Said filtering apparatus comprises optical filter wheel, is arranged at the many groups filter set on the said optical filter wheel and controls said optical filter wheel motor rotating; Said motor whenever rotates a circle, and the inside or the outside detector that are placed in said optical filter wheel can be accomplished the detection of many group tail gas, wherein; Arbitrary filter set comprises that with reference to optical filter, carbon monoxide optical filter, carbon dioxide optical filter and propane optical filter the surfaces of revolution of said arbitrary optical filter plane, place and said optical filter wheel is perpendicular.
6. filtering apparatus as claimed in claim 5 is characterized in that, connecting portion and main shaft that said optical filter wheel comprises the chassis and is divided into both sides, said chassis;
Said optical filter is connected with said chassis is vertical through said connecting portion;
Said main shaft one end is connected with said chassis is vertical, and the other end is connected with the output terminal of said motor.
7. filtering apparatus as claimed in claim 6 is characterized in that said motor is specially servomotor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175832 CN101839853B (en) | 2010-05-13 | 2010-05-13 | Gas detecting instrument and filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010175832 CN101839853B (en) | 2010-05-13 | 2010-05-13 | Gas detecting instrument and filter device |
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| CN101839853A CN101839853A (en) | 2010-09-22 |
| CN101839853B true CN101839853B (en) | 2012-06-27 |
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| CN 201010175832 Active CN101839853B (en) | 2010-05-13 | 2010-05-13 | Gas detecting instrument and filter device |
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| CN102636266A (en) * | 2012-03-30 | 2012-08-15 | 上海傲谱分析仪器有限公司 | Light splitting and photoelectric detecting system for flame photometer |
| CN102608064B (en) * | 2012-04-10 | 2014-09-10 | 河南汉威电子股份有限公司 | Three-channel infrared gas sensor for CO gas high-precision detection |
| CN103235146A (en) * | 2013-04-16 | 2013-08-07 | 长春博信光电子有限公司 | Alcohol content detection method and detector |
| CN104280355B (en) * | 2014-10-24 | 2017-07-14 | 中国科学院上海光学精密机械研究所 | The detection means and detection method of ammonia and concentration of SO 2 gas |
| CN105115942B (en) * | 2015-08-31 | 2017-12-22 | 浙江大学 | The detecting system and method for content of cellulose in a kind of mao bamboon |
| CN107367500A (en) * | 2017-09-04 | 2017-11-21 | 云南电网有限责任公司电力科学研究院 | A kind of insulating materials surface electroluminescent measuring table and method of testing |
| CN109975888A (en) * | 2019-04-02 | 2019-07-05 | 中国科学院合肥物质科学研究院 | A kind of adjustable target optical spectrum characteristic measuring system of band combination band width configuration |
| CN110068542A (en) * | 2019-06-03 | 2019-07-30 | 宁波舜宇红外技术有限公司 | Detect the device of target gas levels in mixed gas |
| CN112748084A (en) * | 2021-01-04 | 2021-05-04 | 安徽中科华仪科技有限公司 | Remote sensing detection method for motor vehicle exhaust based on infrared combined laser |
| CN112748083A (en) * | 2021-01-04 | 2021-05-04 | 安徽中科华仪科技有限公司 | Optical system for remote sensing detection of motor vehicle exhaust |
| CN114166776B (en) * | 2021-12-07 | 2022-07-29 | 深圳市佰特生态环保科技有限公司 | Multi-component waste gas on-line monitoring instrument |
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