JP3629165B2 - Recording medium for recording automobile exhaust gas collection program, automobile exhaust gas collection method, and automobile exhaust gas collection apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a recording medium that records a vehicle exhaust gas collection program, a vehicle exhaust gas collection method, and a vehicle exhaust gas collection device.
[0002]
[Prior art]
Conventionally, in an automobile exhaust gas quantitative sampling device, the exhaust gas of an automobile is diluted with air at a predetermined flow rate, and a part of the exhaust gas collected at a constant flow rate is filled in a bag. By analyzing the components of the filled exhaust gas after dilution with a gas analyzer, it is possible to determine what substances are contained in the exhaust gas of the automobile.
[0003]
FIG. 5 shows an example of a screen for setting various parameters in a conventional automobile exhaust gas quantitative sampling device. In FIG. 5, 30 indicates the volume of the bag for collecting the exhaust gas after dilution, and 31 indicates the filling amount relative to the total volume of the bag. Reference numerals 32 to 34 indicate settings in a state where the exhaust gas after dilution is filled in the bag, 32 is a flow rate for collecting the exhaust gas after dilution into the bag, and 33 is a bag for supplying the exhaust gas after dilution. The sampling time 34 is the total flow rate (main flow rate) of the exhaust gas after dilution.
[0004]
For user can employ each sampled parameter 30-34 by specifying the setting end button 37 after setting the sampling parameters 30-34 described above with reference to the screen used, the collection of the exhaust gas to the bag Ready .
[0005]
Further, in recent years, the pollutants contained in the exhaust gas of automobiles are extremely small. However, by appropriately setting the sampling parameters 30 to 36 as described above, it is possible to more reliably analyze the exhaust gas components. it can. For example, the dilution rate of the exhaust gas to be diluted can be lowered by reducing the main flow rate 34, and the analysis accuracy of the exhaust gas can be increased.
[0006]
[Problems to be solved by the invention]
However, the exhaust gas immediately after the start of the automobile must be thicker than the exhaust gas in a stable running state, and in a state where the dilution rate is lowered, the gas concentration of the exhaust gas after dilution at the start of the automobile May exceed the measurement range of the gas analyzer. That is, in the conventional quantitative sample collection device described above, it has been difficult to collect exhaust gas corresponding to the case where the concentration varies.
[0007]
FIG. 6 shows an example of an operation when the dilution rate of the exhaust gas is changed using the quantitative sampling device. That is, first, using the screen shown in FIG. 5, for example, the main flow rate 34 is set to 12.0 m ² / min, the dilution rate is increased (step Sp1), and sampling of exhaust gas after dilution is started. The first bag was filled with exhaust gas diluted with a high dilution ratio. (Step Sp2)
[0008]
Next, collection of exhaust gas is temporarily stopped (step Sp3), and the main flow rate 34 is set to, for example, 6.0 m ² / min again using the screen shown in FIG. 5 to reduce the dilution rate (step Sp4). ) Again, it was necessary to start collecting the exhaust gas with the bag changed (step Sp5). In other words, when changing the dilution ratio of exhaust gas, it is necessary to stop sampling of exhaust gas, change the setting, and then restart sampling of exhaust gas again. Continuous sampling could not be performed by changing the gas dilution rate.
[0009]
Further, since the main flow rate 34 is changed by resetting each time, not only the setting error may occur, but also after collecting in the bag, the exhaust gas in the bag is analyzed by gas analysis. There was also a possibility that the dilution rate was wrong.
[0010]
The present invention has been made in consideration of the above-mentioned matters, and the object of the present invention is to allow the main flow rate for determining the dilution rate to be set for each bag, and to change the exhaust gas by changing the bag. Provided is a recording medium recording a vehicle exhaust gas sampling program having a function that can be changed without resetting the main flow rate during sampling, a vehicle exhaust gas sampling method, and a vehicle exhaust gas sampling device There is.
[0011]
[Means for Solving the Problems]
To achieve the above object, a recording medium recording a sampling program for an automobile exhaust gas of the present invention, the exhaust gas of an automobile a sampling program for collecting a plurality of bags is diluted with air, the bag collection Car exhaust gas sampling with a flow ratio setting program that presets the exhaust gas dilution rate for each bag using the parameter setting screen and an automatic sampling program that automatically collects exhaust gas diluted at this dilution rate into the bag The program is recorded (claim 1) .
[0012]
By using the recording medium in which the above-described automobile exhaust gas collection program is recorded, a dilution rate can be set for each bag, and exhaust gas collection for each bag can be performed continuously. And the setting of the dilution rate for each bag will not be mistaken. In addition, since the dilution rate of the exhaust gas filled in the bag can be known without fail, the concentration of the components contained in the exhaust gas can be assured by correcting the result of analyzing the collected exhaust gas with a gas analyzer with the dilution rate. Can be sought.
[0013]
The vehicle exhaust gas collection program has a collection parameter setting program for presetting the exhaust gas collection flow after dilution for each bag, and the automatic collection program sets the exhaust gas after dilution to the bag at the set collection flow rate. In the case of collection (claim 2) , the time width for collecting the exhaust gas in the bag can be arbitrarily selected, and more versatile automobile exhaust gas can be collected. In addition, the dilution rate may be set according to the main flow rate of the exhaust gas after dilution (Claim 3).
[0014]
The method for collecting automobile exhaust gas according to the present invention is a collection method for diluting automobile exhaust gas with air and collecting it in a plurality of bags, and using a bag collection parameter setting screen, the dilution rate of exhaust gas for each bag is calculated by a computer. The exhaust gas diluted at a dilution rate set in advance by the computer is automatically collected in a bag (claim 4) .
[0015]
In addition, the collection flow rate of the exhaust gas after dilution for each bag may be preset in the computer, and control may be performed so that the exhaust gas after dilution is collected in the bag at the set collection flow rate . In addition, the dilution rate may be set according to the main flow rate of the exhaust gas after dilution (Claim 6).
[0016]
The vehicle exhaust gas collection device of the present invention is a collection device that dilutes the exhaust gas of the vehicle with air and collects it in a plurality of bags, and uses the bag collection parameter setting screen to set the exhaust gas dilution rate for each bag. A computer set in advance, dilution rate changing means that can be controlled by this computer so that the diluted exhaust gas has a dilution rate set by the computer, and the exhaust gas after dilution is collected in a predetermined bag And an interface circuit for controlling the dilution rate changing means and the bag collecting means according to a control signal from the computer (claim 7) .
[0017]
Further, the computer may have a flow rate adjustment unit that can set in advance the collection flow rate of the exhaust gas after dilution for each bag, and can adjust the flow rate of the exhaust gas after dilution collected by the bag collection means. (Claim 8). Further, the dilution rate may be set according to the main flow rate of the exhaust gas after dilution (claim 9).
[0018]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows the overall configuration of a vehicle exhaust gas sampling apparatus 1 according to a first embodiment of the present invention. The automobile exhaust gas sampling device 1 of this example adjusts the flow rate of the diluted exhaust gas G ′ flowing through the main flow path 2 and the main flow path 2 for mixing the exhaust gas G of the automobile with the air A, A dilution rate changing means 3 for adjusting the dilution rate of the exhaust gas G by A, and a sample flow channel 4 for collecting some of the diluted exhaust gas G ′ from the main flow channel 2 (hereinafter, flowing through the sample flow channel 4) Exhaust gas G ′ after dilution is referred to as sample gas S), mass flow controller 5 and pump 6 for adjusting the flow rate of sample gas S, for example, four bags B _{1 to} B ₄ for collecting sample gas S, and automobiles And a computer 7 for controlling the exhaust gas collecting device 1.
[0019]
The sample gas S is supplied to the corresponding bags B _{1 to} B ₄ via, for example, electromagnetic valves V _{1 to} V ₄ , and discharged to the outside via the electromagnetic valve V ₀ . 8 controls a bag collecting means comprising a dilution rate changing means 3 and electromagnetic valves V _{1 to} V ₄ , a mass flow controller 5 and a pump 6 by a control signal C from the computer 7.
[0020]
In this example, an example is shown in which the dilution rate changing means 3 has a main venturi 3a and a pump 3b whose output can be adjusted by an inverter, and is provided in the main flow path 2 by adjusting the output of the pump 3b. Although the flow rate (main flow rate) of the diluted exhaust gas G ′ flowing through the main venturi 3a at the subsonic speed can be adjusted, the present invention does not limit the dilution rate changing means 3. That is, the flow rate (main flow rate) of the exhaust gas G ′ after dilution flowing at the sonic speed by switching the main venturi 3a may be adjustable. In any case, the flow rate adjustment by the dilution rate changing means 3 can be controlled by the control signal C from the computer 7.
[0021]
Similarly, in this example, the bag collection means includes a sample flow rate adjustment means by the mass flow controller 5 and the pump 6, a bag selection means by the electromagnetic valves V _{1 to} V _4, etc., and each of the bags B _{1 to} B Each of ₄ can be sequentially filled with the sample gas S at a predetermined flow rate, but the present invention does not limit the configuration of the bag collecting means. For example, an appropriate flow rate may be adjustable by forming a venturi for collecting the sample gas S in the sample flow path 4 and switching the venturi or adjusting the output of the pump 6. Also in this case, by transmitting a control signal C from a computer 7 each part 5,6 through the interface 8, the V ₀ ~V _4, is to reduce the burden on the computer 7 side.
[0022]
The computer 7 has program recording means such as a hard disk 7h, for example, and performs various settings by reading the automobile exhaust gas collection program P stored in the hard disk 7h into a main memory (not shown). The control signal C can be output. The vehicle exhaust gas collection program P includes a flow rate ratio setting program P ₁ , an automatic collection program P ₂ , a collection parameter setting program P _3, etc., and displays various setting screens W ₁ and W ₂ on the display 7 d of the computer 7. To do.
[0023]
2 and 3 are diagrams showing examples of screens displayed on the display 7d, FIG. 2 is a bag collection parameter setting screen W ₁ , and FIG. 3 is a flow rate of sample gas collected in each bag B _{1 to} B _4. a selection screen W _2. The bag collection parameter setting screen W ₁ is displayed by the collection parameter setting program P ₃ , and the flow rate selection screen W ₂ is displayed by the flow rate ratio setting program P ₁ . The present invention does not limit the display method or the layout of each screen. For example, although both the screens W ₁ and W ₂ are displayed side by side in the example shown in FIG. 1, they may be displayed in a superimposed manner or switched.
[0024]
2, the volume of the bag B ₁ .about.B ₄ 10, flow rate 11 filling rate to the total volume of the bag B ₁ .about.B _4, 12 a to 12 d is to collect the sample gas S in the bag B ₁ .about.B ₄ , time 13a~13d is to collect the sample gas S in the bag B ₁ .about.B _4, 14a to 14d indicate the total flow rate (main flow rate) of the exhaust gas G 'after dilution during bag filling.
[0025]
Reference numeral 15 denotes a state in which the bag is not filled with exhaust gas. The flow rate at which the sample gas S is collected and discharged through the electromagnetic valve V ₀ , and 16 indicates the main flow rate at that time. Reference numeral 17 denotes a setting end button for updating the setting value, and reference numeral 18 denotes a button for ending without updating the setting value.
[0026]
Therefore, the operator of the automobile exhaust gas collection device 1 can set the main flow rates 14a to 14d for the respective bags B _{1 to} B ₄ using the bag collection parameter setting screen W ₁ shown in FIG. . Further, it is possible set the flow 12a~12d collecting a sample gas S for each bag B ₁ .about.B _4, whereby,. 13a to the length of time to fill the sample gas S in the bag B ₁ .about.B ₄ 13d can be arbitrarily set.
[0027]
In FIG. 3, reference numerals 20 to 25 are main flow rate selection check columns, and reference numerals 21 to 25 are check columns for selecting a main flow rate when the sample gas S is collected in each of the bags B _{1 to} B ₄ . Reference numeral 25 denotes a check column when a constant main flow rate is allowed to flow regardless of the bag, and reference numeral 20 denotes a check column for performing a program operation for automatically changing a different main flow rate for each of the bags B _{1 to} B ₄ . In this example, the check column 20 is checked. Reference numerals 26 and 27 respectively denote an end button that ends after updating the set value and an end button that ends without updating.
[0028]
That is, the operator of the automobile exhaust gas collection device 1 uses the flow rate selection screen W ₂ shown in FIG. 3 to select “Programmed by bag set”, thereby causing the computer 7 to execute the automatic collection program P _2. Thus, the sample gas S can be collected by automatically adjusting each bag B _{1 to} B _{4 to have a} designated main flow rate.
[0029]
In this example, the sample gas S is collected with the main flow rate adjusted to 12.0 m ³ / min only for the bag B ₁ , and the main flow rate is set to 6.0 m ³ / b for the bags B _{2 to} B ₄ . The sample gas S is set to be collected in a state adjusted to min.
[0030]
Next, a method for performing control by the computer 7 when starting collection of the sample gas S from the bags B _{1 to} B ₄ will be described with reference to FIG. S Step ₁ of instruction steps, S ₂ is collected start of the sample gas S to a computer 7 that performs screen W _1, W ₂ set of bags by the main flow by as shown in FIG. 2,3, S ₃ computer 7 This is a step of collecting the sample gas S by
[0031]
In step S ₃ , the computer 7 outputs a flow rate setting control signal C to the interface controller 8. Interface controller 8 according to the control signal C is a main flow is changed in accordance with the set value 14a~14d by controlling the pump 3b, bag collecting means 5,6, the set value 12a~12d with V ₁ ~V ₄ The sample gas having the flow rate is collected in the bags B _{1 to} B ₄ .
[0032]
Now, for example, as shown in FIG. 1, when the sample gas S is collected from the bag B ₁ with the main flow rate being 12.0 m ³ / min, the main flow rate is set to 6.0 m ³ / min. The operation when switching to sampling for the bag B ₂ will be described. At this time, the computer 7 first closes the solenoid valve V ₁ through an interface controller 8, by opening the solenoid valve V _0, it is possible to stop the collection for the bag B ₁ have done now.
[0033]
Next, the computer 7 adjusts the output of the pump 8 through the interface controller 8 so that the main flow rate becomes 6.0 m ³ / min. Then, the electromagnetic valve V ₀ is closed, and the electromagnetic valve V ₂ is opened, so that sampling is performed by changing the bag. All of these operations are performed by the computer 7 outputting the control signal C in accordance with the settings of the screens W ₁ and W _2. Separately, sample gases S having different dilution rates can be collected.
[0034]
Further, since different dilution bag are those defined by the main flow 12a~12d set in advance before performing the sampling of the sample gas S into the bag B ₁ .about.B _4, diluted Alternative bag B ₁ .about.B ₄ A more reliable process can be performed without making a mistake in the rate or forgetting the dilution rate of the sample gas S collected in the bags B _{1 to} B ₄ .
[0035]
In the above example, only when the sample gas S is collected in the first bag B ₁ , the exhaust gas G ′ after being diluted at a dilution ratio twice that of the other bags B _{2 to} B ₄ is used as the sample gas S. Collected. Accordingly, only the exhaust gas G having a relatively high concentration immediately after the start of the vehicle can be diluted and collected at a high dilution rate, and the measured value does not overflow at the stage of the gas analysis of the sample gas S stored in the bags B _{1 to} B _4. Can be.
[0036]
The present invention allows the main flow rate of the exhaust gas G ′ after dilution to be set for each bag, and is not limited to setting only the _first bag B ₁ to increase the dilution rate. Needless to say. It is also possible to make changes such as adjusting each bag B _{1 to} B ₄ to have an optimum dilution ratio. It goes without saying that various conditions such as the number and volume of bags can be changed as appropriate.
[0037]
【The invention's effect】
As described above, according to the present invention, a dilution rate corresponding to each bag can be set, and exhaust gas can be continuously collected from each bag. And the setting of the dilution rate for each bag will not be mistaken. In addition, since the dilution rate of the exhaust gas filled in the bag can be known without fail, the concentration of the components contained in the exhaust gas is assured by correcting the result of analyzing the collected exhaust gas with a gas analyzer with the dilution rate. Can be sought.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of an automobile exhaust gas collecting apparatus according to the present invention.
FIG. 2 is a view showing an example of a bag collection parameter setting screen of the automobile exhaust gas collection device.
FIG. 3 is a diagram showing an example of a flow rate selection screen of the automobile exhaust gas sampling device.
FIG. 4 is a view for explaining a sample gas sampling method by the automobile exhaust gas sampling device.
FIG. 5 is a diagram showing an example of a setting screen of a conventional automobile exhaust gas sampling device.
FIG. 6 is a view for explaining a sample gas sampling method by a conventional automobile exhaust gas sampling device.
[Explanation of symbols]
1 ... collecting apparatus for an automobile exhaust gas, G ... exhaust gas, A ... air, B ₁ .about.B ₄ ... bags, G '... exhaust gas after dilution, P ... automobile exhaust gas sampling programs, P ₁ ... flow ratio set Program, P ₂ ... Automatic collection program, P ₃ ... Collection parameter setting program , W ... Bag collection parameter setting screen .

Claims (9)

A collection program for diluting an automobile exhaust gas with air and collecting it in a plurality of bags, a flow rate ratio setting program for presetting an exhaust gas dilution rate for each bag using a bag collection parameter setting screen ; A computer-readable recording medium having recorded therein an automobile exhaust gas collection program having an automatic collection program for automatically collecting the exhaust gas diluted at this dilution rate into a bag. The automobile exhaust gas collection program has a collection parameter setting program for presetting the exhaust gas collection flow rate after dilution for each bag, and the automatic collection program sets the exhaust gas after dilution at the collection flow rate to the bag. The recording medium according to claim 1 to be collected. The recording medium according to claim 1, wherein the dilution rate is set by a main flow rate of the exhaust gas after dilution. In the collection method of diluting the exhaust gas of an automobile with air and collecting it in a plurality of bags, the dilution rate of exhaust gas for each bag is preset in a computer using the bag collection parameter setting screen, and each is set by this computer. A method for collecting automobile exhaust gas, wherein exhaust gas diluted at a predetermined dilution rate is automatically collected in a bag. 5. The method for collecting automobile exhaust gas according to claim 4 , wherein a collection flow rate of exhaust gas after dilution for each bag is preset in a computer, and control is performed so as to collect exhaust gas after dilution in a bag at the set collection flow rate. The method for collecting automobile exhaust gas according to claim 4 or 5, wherein the dilution rate is set according to a main flow rate of the exhaust gas after dilution. A sampling device that dilutes the exhaust gas of an automobile with air and collects it in multiple bags. A computer that presets the exhaust gas dilution rate for each bag using the bag sampling parameter setting screen and can be controlled by this computer A dilution rate changing means for controlling the diluted exhaust gas to have a dilution rate set by a computer, a bag collecting means for collecting the diluted exhaust gas in a predetermined bag, and a control from the computer An automobile exhaust gas collecting device comprising: an interface circuit for controlling a dilution rate changing means and a bag collecting means according to a signal. 8. The computer according to claim 7 , wherein the computer has a flow rate adjusting unit that can set in advance a collection flow rate of exhaust gas after dilution for each bag and that can adjust a flow rate of diluted exhaust gas collected by the bag collection unit. Automobile exhaust gas sampling device. The automobile exhaust gas sampling device according to claim 7 or 8, wherein the dilution rate can be set by a main flow rate of the exhaust gas after dilution.

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