CN202916191U - Instrument for detecting unconventional components in methanol-fueled vehicle exhaust - Google Patents
Instrument for detecting unconventional components in methanol-fueled vehicle exhaust Download PDFInfo
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- CN202916191U CN202916191U CN 201220549876 CN201220549876U CN202916191U CN 202916191 U CN202916191 U CN 202916191U CN 201220549876 CN201220549876 CN 201220549876 CN 201220549876 U CN201220549876 U CN 201220549876U CN 202916191 U CN202916191 U CN 202916191U
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- chip microcomputer
- infrared
- air chamber
- measuring unit
- tail gas
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Abstract
The utility model discloses an instrument for detecting the unconventional components in methanol-fueled vehicle exhaust, which comprises a sampling probe, a sensor unit, a membrane pump, a condensate separator, an A/D convertor, a single-chip microcomputer, a memory, an LCD (liquid crystal display) display and a measuring unit; the measuring unit comprises an infrared generator, an optical filter, an air chamber and an infrared receiver, wherein the infrared generator is installed on one side of the air chamber, the infrared receiver is installed on the other side of the air chamber, and the optical filter is installed between the infrared generator and the infrared receiver and adjacent to one side of the infrared generator; and the sampling probe is connected with the condensate separator through the membrane pump, the condensate separator is connected with the air chamber of the measuring unit, the infrared receiver of the measuring unit and the sensor unit are connected with the single-chip microcomputer through the A/D convertor, and the memory and the LCD display are also connected on the single-chip microcomputer. The instrument can eliminate the influence from the change of external environment, is good in shockproof performance, stable in running and high in precision, and has extremely excellent stability.
Description
Technical field
The utility model relates to a kind of automobile exhaust gas checking apparatus, relates in particular to the unconventional composition detection instrument of a kind of methanol fuel automobile tail gas.
Background technology
At present, the known energy that might replace oil to be used for automobile has electric energy, hydrogen, alcohols (methyl alcohol, ethanol), ethers (dimethyl ether), liquefied petroleum gas (LPG), compressed natural gas, sun power, biomass energy in the world.Wherein methanol fuel is as the alternate fuel of automobile, because its advantage that possesses becomes and develops faster new forms of energy in numerous alternate fuels.During the fuel blend of gasoline alcohol/gasoline, the dynamic property of engine and economy are improved, the CO in the tail gas, HC and NO
XReducing exhaust emission, but contain other unconventional composition in the tail gas.Conventional automobile exhaust analyzer can not detect analysis to the unconventional composition in the vehicle exhaust after the alcohol/gasoline fuel combustion, the unconventional composition detection analyser of methanol fuel automobile tail gas of necessary design studies special use.
Summary of the invention
For the deficiency that prior art exists, the purpose of this utility model is, provides a kind of SCM Based methanol fuel automobile tail gas unconventional composition detection instrument, and this detector can satisfy the general testing requirement to the unconventional composition of methanol fuel automobile tail gas substantially.
In order to realize above-mentioned task, the utility model adopts following technical scheme to be achieved:
The unconventional composition detection instrument of a kind of methanol fuel automobile tail gas, comprise sampling probe, sensor unit, membrane pump, condensation separator, A/D converter, single-chip microcomputer, storer and LCD display, this detector also includes measuring unit, described measuring unit comprises infrared emittance, optical filter, air chamber and infrared remote receiver, infrared emittance is installed in a side of air chamber, infrared remote receiver is installed in the opposite side of air chamber, and the side near infrared emittance between infrared emittance and infrared remote receiver is equipped with optical filter; Sampling probe links to each other with condensation separator by membrane pump, and condensation separator links to each other with the air chamber of measuring unit, and the infrared remote receiver of measuring unit links to each other with single-chip microcomputer by A/D converter with sensor unit, also is connected with storer and LCD display on the single-chip microcomputer.
The utility model also has following technical characterictic:
An external filter is installed on the described sampling probe.
On the described membrane pump solenoid valve is installed, active carbon filter is installed in the membrane pump.
Described single-chip microcomputer adopts 8051 single-chip microcomputers, also is connected with computing machine and printer on the single-chip microcomputer.
Described sensor unit comprises temperature sensor and pressure transducer, and described temperature sensor model is PT1000, and described pressure transducer model is FRTAP3.
The unconventional composition detection instrument of SCM Based methanol fuel automobile tail gas of the present utility model can be eliminated the impact that external environment changes, and shockproof properties is good, and is stable, and precision is high, has splendid stability.Although the production technology of present methanol fuel, the automotive engineering of special-purpose methanol fuel be comparative maturity all, system's detection means of the unconventional composition of methanol fuel automobile tail gas is also set up.Detection analyser of the present utility model satisfies the general testing requirement to the unconventional composition of methanol fuel automobile tail gas substantially, for realizing that fast detecting lays the foundation.For emission standard and the technological transformation of formulating from now on the unconventional composition of methanol fuel automobile tail gas provides easily surveying instrument, to the emission level of control methanol fuel automobile, reduce them to environment and human deleterious effect, positive realistic meaning is arranged.
Description of drawings
Fig. 1 is detecting unit principle of work schematic diagram of the present utility model.
Fig. 2 is annexation schematic diagram of the present utility model.
Below in conjunction with drawings and Examples particular content of the present utility model is described in more detail.
Embodiment
Below provide specific embodiment of the utility model, need to prove that the utility model is not limited to following specific embodiment, all equivalents of doing on present techniques scheme basis all fall into protection domain of the present utility model.
The unconventional composition detection analysis of infrared methanol fuel automobile tail gas is according to diatomic or the equal principle that can absorb the infrared energy of certain wavelength of polyatomic molecule gas (such as the methyl alcohol in the unconventional composition of methanol fuel automobile tail gas, formaldehyde, acetaldehyde, benzene etc.).Its endergonic Infrared wavelength is called characteristic wavelength, and degree of absorption reflects with absorption coefficient.As shown in Figure 1, the infrared energy that sends of infrared light supply is I
0, it is after the air chamber of L by a length, energy is I
1When if the gas that absorbs infrared energy is arranged in the air chamber, energy I then
1Satisfy I
1=I
0e
-KCL,
In the formula, K is the infrared absorption coefficient of gas, and C is the concentration of tested gas, and L is the length of air chamber.According to the I that measures
1Size can be learnt tested gas concentration.Because every kind of gas all has specific characteristic absorption band and characteristic frequency, near the spectrum characteristic frequency produces strong absorption, and the power according to gas infrared spectrum absorbs detects the concentration that analyzes the unconventional composition of methanol fuel automobile tail gas.
Defer to technique scheme, as shown in Figure 2, the unconventional composition detection instrument of a kind of methanol fuel automobile tail gas, comprise sampling probe, sensor unit, membrane pump, condensation separator, A/D converter, single-chip microcomputer, storer and LCD display, this detector also includes measuring unit, described measuring unit comprises infrared emittance, optical filter, air chamber and infrared remote receiver, infrared emittance is installed in a side of air chamber, infrared remote receiver is installed in the opposite side of air chamber, and the side near infrared emittance between infrared emittance and infrared remote receiver is equipped with optical filter; Sampling probe links to each other with condensation separator by membrane pump, and condensation separator links to each other with the air chamber of measuring unit, and the infrared remote receiver of measuring unit links to each other with single-chip microcomputer by A/D converter with sensor unit, also is connected with storer and LCD display on the single-chip microcomputer.
An external filter is installed on the described sampling probe.On the described membrane pump solenoid valve is installed, the startup by the solenoid control membrane pump with close, active carbon filter is installed in the membrane pump.
Described single-chip microcomputer adopts 8051 single-chip microcomputers, also be connected with computing machine and printer on the single-chip microcomputer, pass through communication interface, the measurement data of the unconventional composition detection analyser of methanol fuel automobile tail gas can be sent to computing machine, in order to do further data analysis and processing, can also measurement result be printed by printer.
Described sensor unit comprises temperature sensor and pressure transducer, and described temperature sensor model is PT1000, and described pressure transducer model is FRT AP3.When adopting infrared absorption principle to detect the unconventional composition of methanol fuel automobile tail gas, need to consider and detect the actual residing environment of gas, consider that environmental factor is on detecting the impact of gas.
Before the measurement, instrument carries out preheating, and solenoid valve starts, and membrane pump is filtered through charcoal filter by clean air entrance air amount, discharges residual gas in the instrument.During measurement, sampling probe is inserted in the automobile exhaust pipe, tail gas is after external filter filters, suck instrument by membrane pump, after isolating moisture in the tail gas by condensation separator, gas enters the air chamber of measuring unit, and isolated moisture is discharged by freeing port.The infrared ray that the infrared emittance of measuring unit sends, infrared ray are received by infrared reception measuring sensor after the mating plate after filtration.Because the infrared ray of methyl alcohol, formaldehyde, acetaldehyde, benzene compound molecule absorption specific wavelength, therefore, can record its content by measuring unit, infrared remote receiver is crossed A/D converter with the information exchange that obtains and is transferred to single-chip microcomputer, demonstrates the content of current unconventional composition after single-chip microcomputer is processed signal by LCD display; Single-chip microcomputer can also link to each other with computing machine with printer, and printer can be printed the content data of unconventional composition, and computing machine can be uploaded program and the data of downloading in the single-chip microcomputer for single-chip microcomputer, and storer provides storage space for data storage and the computing of single-chip microcomputer.In order to offset the external environment factor to the accuracy of detection impact of the unconventional composition of methanol fuel automobile tail gas, in the detector periphery design sensor of measures ambient temperature sensor, atmospheric pressure, import these temperature and pressure signals that affect accuracy of detection into single-chip microcomputer by A/D converter, adopt penalty method to be processed by the program of compiling and editing by single-chip microcomputer, realize counteracting or compensation to environmental factor.
Claims (5)
1. unconventional composition detection instrument of methanol fuel automobile tail gas, comprise sampling probe, sensor unit, membrane pump, condensation separator, A/D converter, single-chip microcomputer, storer and LCD display, it is characterized in that, this detector also includes measuring unit, described measuring unit comprises infrared emittance, optical filter, air chamber and infrared remote receiver, infrared emittance is installed in a side of air chamber, infrared remote receiver is installed in the opposite side of air chamber, and the side near infrared emittance between infrared emittance and infrared remote receiver is equipped with optical filter; Sampling probe links to each other with condensation separator by membrane pump, and condensation separator links to each other with the air chamber of measuring unit, and the infrared remote receiver of measuring unit links to each other with single-chip microcomputer by A/D converter with sensor unit, also is connected with storer and LCD display on the single-chip microcomputer.
2. the unconventional composition detection instrument of methanol fuel automobile tail gas according to claim 1 is characterized in that, an external filter is installed on the described sampling probe.
3. the unconventional composition detection instrument of methanol fuel automobile tail gas according to claim 1 is characterized in that, on the described membrane pump solenoid valve is installed, and active carbon filter is installed in the membrane pump.
4. the unconventional composition detection instrument of methanol fuel automobile tail gas according to claim 1 is characterized in that, described single-chip microcomputer adopts 8051 single-chip microcomputers, also is connected with computing machine and printer on the single-chip microcomputer.
5. the unconventional composition detection instrument of methanol fuel automobile tail gas according to claim 1, it is characterized in that, described sensor unit comprises temperature sensor and pressure transducer, and described temperature sensor model is PT1000, and described pressure transducer model is FRTAP3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220549876 CN202916191U (en) | 2012-10-24 | 2012-10-24 | Instrument for detecting unconventional components in methanol-fueled vehicle exhaust |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220549876 CN202916191U (en) | 2012-10-24 | 2012-10-24 | Instrument for detecting unconventional components in methanol-fueled vehicle exhaust |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202916191U true CN202916191U (en) | 2013-05-01 |
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ID=48164495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220549876 Expired - Fee Related CN202916191U (en) | 2012-10-24 | 2012-10-24 | Instrument for detecting unconventional components in methanol-fueled vehicle exhaust |
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| Country | Link |
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| CN (1) | CN202916191U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478590A (en) * | 2017-08-08 | 2017-12-15 | 南京新远见智能科技有限公司 | A kind of method of combination motor vehicle intelligent vision identification and remote exhaust emission detection |
-
2012
- 2012-10-24 CN CN 201220549876 patent/CN202916191U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107478590A (en) * | 2017-08-08 | 2017-12-15 | 南京新远见智能科技有限公司 | A kind of method of combination motor vehicle intelligent vision identification and remote exhaust emission detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130501 Termination date: 20131024 |