CN110361439A - Gas concentration measuring apparatus and its control method - Google Patents
Gas concentration measuring apparatus and its control method Download PDFInfo
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- CN110361439A CN110361439A CN201910727178.9A CN201910727178A CN110361439A CN 110361439 A CN110361439 A CN 110361439A CN 201910727178 A CN201910727178 A CN 201910727178A CN 110361439 A CN110361439 A CN 110361439A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000012360 testing method Methods 0.000 claims abstract description 183
- 238000001514 detection method Methods 0.000 claims description 22
- 238000004891 communication Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 24
- 230000003247 decreasing effect Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 575
- 239000003792 electrolyte Substances 0.000 description 19
- 239000012895 dilution Substances 0.000 description 18
- 238000010790 dilution Methods 0.000 description 18
- 239000000243 solution Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 8
- 238000012937 correction Methods 0.000 description 4
- 239000004615 ingredient Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 230000002209 hydrophobic effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 239000011800 void material Substances 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
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/416—Systems
- G01N27/4162—Systems investigating the composition of gases, by the influence exerted on ionic conductivity in a liquid
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D7/00—Control of flow
- G05D7/06—Control of flow characterised by the use of electric means
- G05D7/0617—Control of flow characterised by the use of electric means specially adapted for fluid materials
- G05D7/0629—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means
- G05D7/0635—Control of flow characterised by the use of electric means specially adapted for fluid materials characterised by the type of regulator means by action on throttling means
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Abstract
The embodiment of the invention discloses a kind of gas concentration measuring apparatus and its control method, which includes zero gas entrance, under test gas entrance, gas sensor, gas piping, first flow controller, second flow controller, vortex mixer and controller；First flow controller, second flow controller and gas sensor are communicated to connect with controller respectively, and vortex mixer is electrically connected with the controller.The technical solution of the embodiment of the present invention solves quickly to be shortened since gas sensor persistently detects service life caused by under test gas in the prior art, measurement accuracy is remarkably decreased, the technical issues of can not even continuing to use, realize the service life for extending gas concentration measuring apparatus, the accuracy for keeping measurement enables gas concentration measuring apparatus to continue to use.
Description
Technical field
The present embodiments relate to gas detection technology more particularly to a kind of gas concentration measuring apparatus and its controlling parties
Method.
Background technique
Gas sensor is widely used in the measurement of gas concentration, and common gas sensor includes electrochemical sensor,
Electrochemical sensor is by reacting and generating the electric signal directlyed proportional to gas concentration under test gas come work.Typically
Electrochemical sensor is made of sensing electrode (or working electrode) and counterelectrode, and is separated by a thin electrolyte layers.Gas to be detected
Body is reacted by small hollow billet type aperture with sensor first, then by hydrophobic barrier layer, eventually arrives at electrode table
Face.It can permit under test gas in this way to react with sensing electrode, to form sufficient electric signal, prevent simultaneously
Electrolyte leaks out sensor.
The life expectancy of gas sensor depends on several factors, the use environment item including under test gas and sensor
Part.In general, life expectancy as defined in gas sensor is 1 to three year.In practical application, since gas sensor is usual
Test constantly under test gas causes its service life quickly to shorten.When gas sensor reaches service life, measurement accuracy meeting
It is remarkably decreased, leads to not continue to use.
Summary of the invention
The embodiment of the present invention provides a kind of gas concentration measuring apparatus and its control method, to realize that extending gas concentration surveys
The service life for measuring device keeps the accuracy of measurement, and gas concentration measuring apparatus is enable to continue to use.
In a first aspect, the embodiment of the invention provides a kind of gas concentration measuring apparatus, the gas concentration measuring apparatus packet
Include: zero gas entrance, gas sensor, gas piping, first flow controller, second flow controller, mixes under test gas entrance
Even device and controller；
The vortex mixer includes that first entrance, second entrance and vortex mixer outlet, the first flow controller are set to
On gas piping between the zero gas entrance and the first entrance, the second flow controller is set to the gas to be measured
On gas piping between body entrance and the second entrance, the gas sensor is set to vortex mixer outlet connection
On gas piping, the first flow controller, the second flow controller and the gas sensor respectively with the control
Device communication connection processed, the vortex mixer are electrically connected with the controller.
Optionally, zero gas does not contain the under test gas or interference gas.
Optionally, the concentration value for the under test gas that the controller can be detected according to the gas sensor, passes through institute
The flow that the control of first flow controller is passed through zero gas of the gas sensor is stated, and passes through the second flow controller
Control is passed through the flow of the under test gas of the gas sensor.
Optionally, the gas concentration measuring apparatus further include:
First valve and the second valve, first valve be set to vortex mixer outlet and the gas sensor it
Between gas pipeline, second valve is set to the gas pipeline after the gas sensor, first valve and institute
The second valve is stated to be electrically connected with the controller respectively；
The controller is also used to control opening or closing for first valve and second valve.
Optionally, the gas concentration measuring apparatus further include:
Emptier, second valve connect the emptier by the gas piping.
Optionally, when the gas concentration measuring apparatus is not used in detection under test gas, the controller is also used to pass through
The first flow controller controls after zero gas is passed through and cleans the gas sensor, controls first valve and described the
Two valves are closed.
Optionally, the controller is also used to when the concentration value of the under test gas is greater than given threshold, by described
The flow value for zero gas that the control of first flow controller is passed through is the first setting value, so that the testing result of the gas sensor
In default value section.
Optionally, the controller is also used to the concentration value that determination is passed through the under test gas after zero gas, after being passed through zero gas
The concentration value of the under test gas are as follows: y2=y1/ (m/ (m+n))；
Wherein, y2 is the concentration value of the under test gas after being passed through zero gas, and y1 is to be passed through the gas sensor before zero gas
The concentration value of the under test gas of detection, m are the flow value of the under test gas, and n is first setting value.
Optionally, the controller, which is also used to control zero gas by the first flow controller, is passed through the gas sensing
Device obtains the corresponding detected value of the gas sensor, and corrects the gas sensor according to the detected value.
Second aspect, the embodiment of the invention also provides a kind of control method of gas concentration measuring apparatus, the gas
Apparatus for measuring concentration includes: zero gas entrance, under test gas entrance, gas sensor, gas piping, first flow controller,
Two flow controllers, vortex mixer and controller；The vortex mixer includes that first entrance, second entrance and vortex mixer export, described
First flow controller is set on the gas piping between the zero gas entrance and the first entrance, the second flow control
Device processed is set on the gas piping between the under test gas entrance and the second entrance, and the gas sensor is set to
On the gas piping of vortex mixer outlet connection, the first flow controller, the second flow controller and the gas
Body sensor is communicated to connect with the controller respectively, and the vortex mixer is electrically connected with the controller；
The control method includes:
The concentration value for the under test gas that the controller is detected according to the gas sensor passes through the first flow control
Device processed control is passed through the flow of zero gas of the gas sensor, and is passed through by second flow controller control described
The flow of the under test gas of gas sensor.
Optionally, the gas concentration measuring apparatus further include: the first valve and the second valve, the first valve setting
Gas pipeline between vortex mixer outlet and the gas sensor, second valve are set to the gas sensing
Gas pipeline after device, first valve and second valve are electrically connected with the controller respectively；
The control method further include:
The controller controls opening or closing for first valve and second valve.
Optionally, the control method further include:
When the gas concentration measuring apparatus is not used in detection under test gas, the controller passes through the first flow control
After zero gas of device control processed is passed through and cleans the gas sensor, controls first valve and second valve is closed.
Optionally, the control method further include:
The controller passes through the first flow controller when the concentration value of the under test gas is greater than given threshold
The flow value for controlling zero gas being passed through is the first setting value, so that the testing result of the gas sensor is in default value area
Between.
Optionally, the control method further include:
The controller determines be passed through zero gas after the under test gas concentration value, be passed through the under test gas after zero gas
Concentration value are as follows: y2=y1/ (m/ (m+n))；
Wherein, y2 is the concentration value of the under test gas after being passed through zero gas, and y1 is to be passed through the gas sensor before zero gas
The concentration value of the under test gas of detection, m are the flow value of the under test gas, and n is first setting value.
Optionally, the control method further include:
The controller controls the stream that zero gas is passed through zero gas of the gas sensor by the first flow controller
Amount obtains the corresponding detected value of concentration value of zero gas of the gas sensor detection, and according to the dense of zero gas of detected value
Angle value corrects the gas sensor.
The embodiment of the invention provides a kind of gas concentration measuring apparatus and its control method, the gas concentration measuring apparatus
Including zero gas entrance, under test gas entrance, gas sensor, gas piping, first flow controller, second flow controller,
Vortex mixer and controller control first flow controller, second flow controller and vortex mixer by controller, make under test gas
Enter gas piping by under test gas entrance, so that zero gas is entered gas piping by zero gas entrance, examined by gas sensor
The concentration of the under test gas after the dilution of zero gas is surveyed, and calculates the actual concentrations value of under test gas by controller, is solved existing
Have in technology and quickly shorten since gas sensor persistently detects service life caused by under test gas, under measurement accuracy is significant
The technical issues of dropping, or even can not continuing to use realizes the service life for extending gas concentration measuring apparatus, keeps measurement
Accuracy enables gas concentration measuring apparatus to continue to use.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the gas concentration measuring apparatus provided in the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of another gas concentration measuring apparatus provided in the embodiment of the present invention；
Fig. 3 is the structural schematic diagram of another gas concentration measuring apparatus provided in the embodiment of the present invention；
Fig. 4 is a kind of flow diagram of the control method of the gas concentration measuring apparatus provided in the embodiment of the present invention.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Fig. 1 is a kind of structural schematic diagram of gas concentration measuring apparatus provided in an embodiment of the present invention, as shown in Figure 1, should
Gas concentration measuring apparatus includes: zero gas entrance A, under test gas entrance B, gas sensor 10, gas piping (referring in Fig. 1
Oblique line portion), first flow controller 20, second flow controller 30, vortex mixer 40 and controller 50；
Vortex mixer 40 includes first entrance C1, second entrance C2 and vortex mixer exports C3, and first flow controller 20 is arranged
On gas piping between zero gas entrance A and first entrance C1, second flow controller 30 be set under test gas entrance B and
On gas piping between second entrance C2, gas sensor 10 is set on the gas piping of vortex mixer outlet C3 connection, the
(Fig. 1 passes through void with the communication connection of controller 50 respectively for one flow controller 20, second flow controller 30 and gas sensor 10
Line connecting line is shown), vortex mixer 40 is electrically connected (connecting line is shown Fig. 1 by a dotted line) with controller 50.
Specifically, zero gas entrance A can be passed through zero gas, under test gas entrance B can be passed through gas to be detected, first-class
Amount controller 20 can be used for controlling the flow that zero gas of gas piping is passed through through zero gas entrance A, and second flow controller 30 can
For controlling the flow for being passed through the under test gas of gas piping through under test gas entrance B, first flow controller 20 and second
Flow controller 30 controls the mode of gas flow, for example, can be set inside zero gas entrance A and under test gas entrance B point
The valve not being electrically connected with first flow controller 20 and second flow controller 30, first flow controller 20 and second flow
Controller 30 can be controlled separately the aperture of corresponding valve, to control the gas that zero gas entrance A and under test gas entrance B are passed through
Flow, vortex mixer 40 passes through mixing after being quickly uniformly mixed gas that first entrance C1 and second entrance C2 are passed through
Device exports C3 discharge, and gas sensor 10 can be electrochemical sensor, be able to detect the concentration value of under test gas, controller 50
It can receive the signal of the output of gas sensor 10, and control first flow controller 20, second flow controller 30 and mix
Device 40.
Illustratively, the working principle of gas concentration measuring apparatus shown in Fig. 1 are as follows: controller 50 can pass through control second
Flow controller 30 makes under test gas be passed through the gas piping of gas concentration measuring apparatus through under test gas entrance B, passes through control
First flow controller 20 makes zero gas be passed through gas piping through zero gas entrance A, what first entrance C1 can be passed through by vortex mixer 40
The under test gas that zero gas and second entrance C2 are passed through quickly is uniformly mixed, and is exported C3 discharge by vortex mixer and diluted through zero gas
Under test gas afterwards, gas sensor 10 can detecte the concentration value of the under test gas after the dilution of zero gas, generate concentration signal
And export to controller 50, controller 50 can calculate the actual concentrations value of under test gas, due to the exposure of gas sensor 10
When in the under test gas of high concentration, the consumption of the electrolyte in gas sensor 10 can be dramatically speeded up, and cause its service life quick
Shorten, when gas sensor 10 reaches service life, measurement accuracy can be remarkably decreased, and lead to gas concentration measuring apparatus not
It can be used, therefore, the under test gas after the dilution of zero gas, which is passed through gas sensor 10, can slow down in gas sensor 10
Electrolyte consumption extends the service life of the gas concentration measuring apparatus, the accuracy of measurement is kept, so that gas concentration measurement
Device can continue to use.
Gas concentration measuring apparatus provided in an embodiment of the present invention includes zero gas entrance, under test gas entrance, gas sensing
Device, gas piping, first flow controller, second flow controller, vortex mixer and controller, are controlled first-class by controller
Amount controller, second flow controller and vortex mixer, make under test gas enter gas piping by under test gas entrance, make zero gas
Enter gas piping by zero gas entrance, by the concentration of under test gas of the gas sensor detection after the dilution of zero gas, and leads to
The actual concentrations value that controller calculates under test gas is crossed, is solved in the prior art since gas sensor persistently detects gas to be measured
Service life caused by body quickly shortens, and measurement accuracy is remarkably decreased, or even the technical issues of can not continue to use, realizes
The service life for extending gas concentration measuring apparatus keeps the accuracy of measurement, gas concentration measuring apparatus is enable persistently to make
With.
Optionally, as shown in Figure 1, based on the above technical solution, zero gas does not contain under test gas or interference gas.
Illustratively, when zero gas is passed through into gas sensor 10, the measurement result of gas sensor 10 can be made to be shown as zero.Zero gas
For the gas without containing under test gas ingredient or other interference gas ingredients, for example, zero gas can be without under test gas ingredient
High Purity Nitrogen or clean air, zero gas will not consume the electrolyte in gas sensor 10 after being passed through, in this way, compared to directly will
The under test gas of high concentration is passed through gas sensor 10, and under test gas is passed through gas after the dilution of zero gas again by vortex mixer 40
Sensor 10 can slow down the electrolyte consumption in gas sensor 10, to extend the service life of gas sensor 10.
Optionally, it continues to refer to figure 1, based on the above technical solution, controller 50 can be according to gas sensor
The concentration value of the under test gas of 10 detections, the stream for being passed through zero gas of gas sensor 10 is controlled by first flow controller 20
Amount, and the flow for being passed through the under test gas of gas sensor 10 is controlled by second flow controller 30.
Illustratively, the concentration value for the under test gas that controller 50 can be detected according to gas sensor 10, in gas to be measured
The concentration value of body is excessively high, when the electrolyte in gas sensor 10 may be caused to consume rapidly, passes through first flow controller
20 controls are passed through the flow of zero gas of gas sensor 10, and are passed through gas sensor by the control of second flow controller 30
The flow of 10 under test gas, realization mixes zero gas being passed through and under test gas in proportion, to dilute under test gas, and according to gas
The concentration value for the under test gas that body sensor 10 detects, and the flow value of zero gas and the flow value of under test gas that are passed through and its
Mixed proportion determines the actual concentrations value of under test gas.
Optionally, as shown in Figure 1, based on the above technical solution, controller 50 is also used in the dense of under test gas
It is the first setting value by the flow value that first flow controller 20 controls zero gas being passed through when angle value is greater than given threshold, with
The testing result of gas sensor 10 is set to be in default value section.
Specifically, the electrolyte in gas sensor 10 can be caused to disappear rapidly when the concentration value due under test gas is excessively high
Consumption, given threshold can be by the preset electrolyte that will not cause in gas sensor 10 of controller 50 consume rapidly to
The given threshold for surveying the concentration of gas, correspondingly, the under test gas that default value section corresponds to existing concentration will not cause gas
The default value section that electrolyte in body sensor 10 consumes rapidly, for example, gas sensor 10 has certain range, it can be with
It is 0-R, corresponding, default value section can be the gas concentration range that 0.5R-0.8R or gas sensor 10 can detecte
0-100%, corresponding, default value section can be 50%-80%, above-mentioned given threshold and default value section it is specific
Size can be determined in conjunction with the parameter and the type of under test gas of gas sensor 10, the embodiment of the present invention to this without
Limitation.
Illustratively, controller 50 is passed through under test gas by under test gas entrance B by second flow controller 30
Gas concentration measuring apparatus, it includes under test gas concentration value that gas sensor 10 is generated according to the concentration value of the under test gas of detection
Concentration signal and export to controller 50, if the concentration value of under test gas is greater than given threshold, controller 50 can be by the
The flow value for zero gas that the control of one flow controller 20 is passed through is the first setting value, and continues to control by second flow controller 30
It makes remaining under test gas to be passed through, vortex mixer 40 is made to be further continued for being passed through gas sensor 10 after the dilution of zero gas by under test gas, with
The testing result of gas sensor 10 is set to be in default value section；Optionally, controller 50 is also used in the dense of under test gas
When angle value is less than or equal to given threshold, zero gas entrance A is controlled by first flow controller 20 and is not passed through zero gas.In this way, first
It is first passed through under test gas, quickly due to the response of gas sensor 10, when detecting under test gas concentration value lower than given threshold,
The electrolyte consumption in gas sensor 10 will not be caused too fast, it is to be measured detecting without being passed through zero gas dilution under test gas
When gas concentration value is higher than given threshold, the electrolyte in gas sensor 10 can be consumed rapidly, therefore be passed through zero gas, pass through zero
Gas detects again after diluting remaining under test gas, to slow down the electrolyte consumption in gas sensor 10, extends gas sensor 10
Service life.
Optionally, it continues to refer to figure 1, based on the above technical solution, controller 50 is also used to determination and is passed through zero gas
The concentration value of under test gas afterwards is passed through the concentration value of under test gas after zero gas are as follows:
Y2=y1/ (m/ (m+n))；
Wherein, y2 is the concentration value of under test gas after being passed through zero gas, and y1 is that gas sensor 10 detects before being passed through zero gas
The concentration value of under test gas, m are the flow value of under test gas, and n is the first setting value.
Illustratively, before being passed through zero gas, if the concentration value for the under test gas passed first into that gas sensor 10 detects is
Y1, and y1 is greater than given threshold, then controller 50 controls zero gas by first flow controller 20 and is passed through, and the flow value of zero gas
For the first setting value n, controller 50, which controls under test gas by second flow controller 30, to be continued to be passed through, and the stream of under test gas
Magnitude is m, then dilution ratio is k=m:n, and the concentration value of under test gas of the detection of gas sensor 10 after the dilution of zero gas is
Y2, due under test gas target components quality before dilution be after dilution it is equal, so having:
M*y2=(m+n) * y1；
So y2* (m/ (m+n))=y1；
Then y2=y1/ (m/ (m+n))；
There is k=m:n again,
Therefore y2 may also indicate that are as follows: y2=y1/ (k/ (k+1)).
Fig. 2 is that the structural schematic diagram of another gas concentration measuring apparatus provided in an embodiment of the present invention is optionally such as schemed
Shown in 2, based on the above technical solution, gas concentration measuring apparatus further include: the first valve 60 and the second valve 70, the
One valve 60 is set to the gas pipeline between vortex mixer outlet C3 and gas sensor 10, and the second valve 70 is set to gas biography
Gas pipeline after sensor 10, the first valve 60 and the second valve 70 are electrically connected with controller 50 respectively；
Controller 50 is also used to control opening or closing for the first valve 60 and the second valve 70.
Illustratively, the first valve 60 can be connected to the gas access of gas sensor 10, and the second valve 70 can be with
The gas vent of gas sensor 10 is connected to, and after controller 50 controls the unlatching of the first valve 60, can make vortex mixer outlet C3 row
Gas out is passed through gas sensor 10 can make complete in gas sensor 10 after controller 50 controls the unlatching of the second valve 70
At the gas discharge of measurement concentration value.
Optionally, with continued reference to Fig. 2, based on the above technical solution, gas concentration measuring apparatus is not used in detection
When under test gas, controller 50, which is also used to control zero gas by first flow controller 20, is passed through simultaneously purge gas sensor 10
Afterwards, it controls the first valve 60 and the second valve 70 is closed.
Illustratively, the scene that high frequency quickly detects the concentration value of under test gas is not needed in gas concentration measuring apparatus
Under, controller 50 can control under test gas entrance B by second flow controller 30 and not be passed through under test gas, while pass through the
One flow controller 20 controls zero gas and is passed through gas piping, so that zero gas is passed through gas by first entrance C1 and vortex mixer outlet C3
Body sensor 10, the electrolyte loss speed drop due to containing only zero gas in gas sensor 10 at this time, in gas sensor 10
As low as minimum, the service life of gas sensor 10 can be cleaned and effectively extend, further, in order to save the usage amount of zero gas,
After ensuring that gas sensor 10 is cleaned up by zero gas, it can control device 50 and control the first valve 60 and the second valve 70
It closes, had both been able to maintain protection of zero gas to gas sensor 10 in this way, and had in turn avoided the waste of zero gas.
Fig. 3 is that the structural schematic diagram of another gas concentration measuring apparatus provided in an embodiment of the present invention is optionally such as schemed
Shown in 3, based on the above technical solution, gas concentration measuring apparatus further include: emptier 80, the second valve 70 pass through
Gas piping connects emptier 80.
Illustratively, after the Concentration Testing of gas concentration measuring apparatus completion under test gas, if desired empty or collect inspection
Emptier 80 can be set under test gas after survey, controls the second valve 70 by controller 50 and opens, so that under test gas
Emptier 80 can be entered by gas piping, optionally, the gas vent that emptier 80 can also be arranged passes through gas
Pipeline is connected to other equipment, and the gas collected in emptier 80 is discharged to other equipment for storage by gas piping
Or it uses.
Optionally, as shown in Figure 1-3, based on the above technical solution, controller 50 is also used to pass through first flow
Controller 20 controls zero gas and is passed through gas sensor 10, obtains the corresponding detected value of gas sensor 10, and according to detected value school
Positive gas sensor 10.
It illustratively, can be by being passed through zero gas to gas when gas concentration measuring apparatus is detected without gas concentration
Bulk concentration measuring device carries out zero point correction, leads to specifically, controller 50 can control zero gas by first flow controller 20
Enter gas sensor 10, wherein the time for being passed through zero gas should be greater than the response time of gas sensor 10, obtain gas sensor
10 corresponding detected values, and according to the detected value correcting gas sensor 10, for example, if the corresponding detected value of gas sensor 10
It is zero, illustrates that the measurement accuracy of gas sensor 10 is higher, zero correction is not necessarily to, if the corresponding detected value of gas sensor 10 is
Z0 illustrates that the measurement result of gas sensor 10 is inaccurate, subsequent to continue to use gas concentration measuring apparatus detection under test gas
Concentration when, Z0 should be subtracted on the basis of measurement result, be only the actual concentrations value of under test gas.
Fig. 4 is a kind of flow diagram of the control method of gas concentration measuring apparatus provided in an embodiment of the present invention, should
The control method of gas concentration measuring apparatus for controlling gas concentration measuring apparatus provided in an embodiment of the present invention, such as Fig. 1 and
Shown in Fig. 4, the gas concentration measuring apparatus include: zero gas entrance A, under test gas entrance B, gas sensor 10, gas piping,
First flow controller 20, second flow controller 30, vortex mixer 40 and controller 50；Vortex mixer 40 include first entrance C1,
Second entrance C2 and vortex mixer export C3, and first flow controller 20 is set to the gas between zero gas entrance A and first entrance C1
On body pipeline, second flow controller 30 is set on the gas piping between under test gas entrance B and second entrance C2, gas
Sensor 10 is set on the gas piping of vortex mixer outlet C3 connection, first flow controller 20, second flow controller 30
It is communicated to connect respectively with controller 50 with gas sensor 10, vortex mixer 40 is electrically connected with controller 50；
The control method of the gas concentration measuring apparatus includes:
Step S110, the concentration value for the under test gas that controller 50 is detected according to gas sensor 10, passes through first flow
Controller 20 controls the flow for being passed through zero gas of gas sensor 10.
Illustratively, with reference to Fig. 1 and Fig. 4, controller 50 can be according to the dense of the under test gas that gas sensor 10 detects
Angle value, it is excessively high in the concentration value of under test gas, when the electrolyte in gas sensor 10 may be caused to consume rapidly, pass through
The control of one flow controller 20 is passed through the flow of zero gas of gas sensor 10.
Step S120, controller 50 controls the under test gas for being passed through gas sensor 10 by second flow controller 30
Flow.
Illustratively, with reference to Fig. 1 and Fig. 4, controller 50 can be controlled by second flow controller 30 and be passed through gas biography
The flow of the under test gas of sensor 10, realization mixes zero gas being passed through and under test gas in proportion, to dilute under test gas, and root
According to the concentration value for the under test gas that gas sensor 10 detects, and the flow value of the flow value of zero gas and under test gas being passed through
And its mixed proportion, determine the actual concentrations value of under test gas.
It should be noted that the embodiment of the present invention controls controller 50 in step S110 by first flow controller 20
Controller 50 controls the under test gas being passed through by second flow controller 30 in the flow and step S120 of zero gas being passed through
The sequencing of flow execution is simultaneously not limited, and controller 50 can also pass through first flow controller 20 and second simultaneously
The flow of amount controller 30 control zero gas being passed through and under test gas.
The control method of gas concentration measurement provided in an embodiment of the present invention is for controlling gas provided in an embodiment of the present invention
Bulk concentration measuring device, the gas concentration measuring apparatus include zero gas entrance, under test gas entrance, gas sensor, flue
Road, first flow controller, second flow controller, vortex mixer and controller, by controller control first flow controller,
Second flow controller and vortex mixer make under test gas enter gas piping by under test gas entrance, and zero gas is made to pass through zero gas
Entrance enters gas piping, by the concentration of under test gas of the gas sensor detection after the dilution of zero gas, and passes through controller
The actual concentrations value for calculating under test gas, solves in the prior art since gas sensor persistently detects caused by under test gas
Service life quickly shortens, and measurement accuracy is remarkably decreased, or even the technical issues of can not continue to use, realizes extension gas
The service life of apparatus for measuring concentration keeps the accuracy of measurement, and gas concentration measuring apparatus is enable to continue to use.
Optionally, with reference to Fig. 1, based on the above technical solution, the control method of the gas concentration measuring apparatus is also
Include:
Controller 50 is passed through when the concentration value of under test gas is greater than given threshold by the control of first flow controller 20
Zero gas flow value be the first setting value so that the testing result of gas sensor 10 is in default value section.
Illustratively, controller 50 is passed through under test gas by under test gas entrance B by second flow controller 30
Gas concentration measuring apparatus, it includes under test gas concentration value that gas sensor 10 is generated according to the concentration value of the under test gas of detection
Concentration signal and export to controller 50, if the concentration value of under test gas is greater than given threshold, controller 50 can be by the
The flow value for zero gas that the control of one flow controller 20 is passed through is the first setting value, and continues to control by second flow controller 30
It makes remaining under test gas to be passed through, vortex mixer 40 is made to be further continued for being passed through gas sensor 10 after the dilution of zero gas by under test gas, with
The testing result of gas sensor 10 is set to be in default value section；Optionally, controller 50 is also used in the dense of under test gas
When angle value is less than or equal to given threshold, zero gas entrance A is controlled by first flow controller 20 and is not passed through zero gas.In this way, first
It is first passed through under test gas, quickly due to the response of gas sensor 10, when detecting under test gas concentration value lower than given threshold,
The electrolyte consumption in gas sensor 10 will not be caused too fast, it is to be measured detecting without being passed through zero gas dilution under test gas
When gas concentration value is higher than given threshold, the electrolyte in gas sensor 10 can be consumed rapidly, therefore be passed through zero gas, pass through zero
Gas detects again after diluting remaining under test gas, to slow down the electrolyte consumption in gas sensor 10, extends gas sensor 10
Service life.
Optionally, it continues to refer to figure 1, based on the above technical solution, the controlling party of the gas concentration measuring apparatus
Method further include:
The determination of controller 50 is passed through the concentration value of under test gas after zero gas, is passed through the concentration value of under test gas after zero gas are as follows:
Y2=y1/ (m/ (m+n))；
Wherein, y2 is the concentration value of under test gas after being passed through zero gas, and y1 is that gas sensor 10 detects before being passed through zero gas
The concentration value of under test gas, m are the flow value of under test gas, and n is the first setting value.
Illustratively, before being passed through zero gas, if the concentration value for the under test gas passed first into that gas sensor 10 detects is
Y1, and y1 is greater than given threshold, then controller 50 controls zero gas by first flow controller 20 and is passed through, and the flow value of zero gas
For the first setting value n, controller 50, which controls under test gas by second flow controller 30, to be continued to be passed through, and the stream of under test gas
Magnitude is m, then dilution ratio is k=m:n, and the concentration value of under test gas of the detection of gas sensor 10 after the dilution of zero gas is
Y2, due under test gas target components quality before dilution be after dilution it is equal, so having:
M*y2=(m+n) * y1；
So y2* (m/ (m+n))=y1；
Then y2=y1/ (m/ (m+n))；
There is k=m:n again,
Therefore y2 may also indicate that are as follows: y2=y1/ (k/ (k+1)).
Optionally, with reference to Fig. 2, based on the above technical solution, gas concentration measuring apparatus further include: the first valve
60 and second valve 70, the first valve 60 is set to the gas pipeline between vortex mixer outlet C3 and gas sensor 10, and second
Valve 70 is set to the gas pipeline after gas sensor 10, and the first valve 60 and the second valve 70 are electric with controller 50 respectively
Connection；
The control method of the gas concentration measuring apparatus further include:
Controller 50 controls opening or closing for the first valve 60 and the second valve 70.
Illustratively, the first valve 60 can be connected to the gas access of gas sensor 10, and the second valve 70 can be with
The gas vent of gas sensor 10 is connected to, and after controller 50 controls the unlatching of the first valve 60, can make vortex mixer outlet C3 row
Gas out is passed through gas sensor 10 can make complete in gas sensor 10 after controller 50 controls the unlatching of the second valve 70
At the gas discharge of measurement concentration value.
Optionally, with continued reference to Fig. 2, based on the above technical solution, the controlling party of the gas concentration measuring apparatus
Method further include:
When gas concentration measuring apparatus is not used in detection under test gas, controller 50 is controlled by first flow controller 20
Zero gas is passed through and after purge gas sensor 10, controls the first valve 60 and the second valve 70 is closed.
Illustratively, the scene that high frequency quickly detects the concentration value of under test gas is not needed in gas concentration measuring apparatus
Under, controller 50 can control under test gas entrance B by second flow controller 30 and not be passed through under test gas, while pass through the
One flow controller 20 controls zero gas and is passed through gas piping, so that zero gas is passed through gas by first entrance C1 and vortex mixer outlet C3
Body sensor 10, the electrolyte loss speed drop due to containing only zero gas in gas sensor 10 at this time, in gas sensor 10
As low as minimum, the service life of gas sensor 10 can be cleaned and effectively extend, further, in order to save the usage amount of zero gas,
After ensuring that gas sensor 10 is cleaned up by zero gas, it can control device 50 and control the first valve 60 and the second valve 70
It closes, had both been able to maintain protection of zero gas to gas sensor 10 in this way, and had in turn avoided the waste of zero gas.
Optionally, -3 are continued to refer to figure 1, based on the above technical solution, the control of the gas concentration measuring apparatus
Method further include:
Controller 50 controls the flow that zero gas is passed through zero gas of gas sensor 10 by first flow controller 20, obtains
The corresponding detected value of concentration value for zero gas that gas sensor 10 detects, and passed according to the concentration value correcting gas of zero gas of detected value
Sensor 10.
It illustratively, can be by being passed through zero gas to gas when gas concentration measuring apparatus is detected without gas concentration
Bulk concentration measuring device carries out zero point correction, leads to specifically, controller 50 can control zero gas by first flow controller 20
Enter gas sensor 10, wherein the time for being passed through zero gas should be greater than the response time of gas sensor 10, obtain gas sensor
10 corresponding detected values, and according to the detected value correcting gas sensor 10, for example, if the corresponding detected value of gas sensor 10
It is zero, illustrates that the measurement accuracy of gas sensor 10 is higher, zero correction is not necessarily to, if the corresponding detected value of gas sensor 10 is
Z0 illustrates that the measurement result of gas sensor 10 is inaccurate, subsequent to continue to use gas concentration measuring apparatus detection under test gas
Concentration when, Z0 should be subtracted on the basis of measurement result, be only the actual concentrations value of under test gas.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (15)
1. a kind of gas concentration measuring apparatus characterized by comprising zero gas entrance, under test gas entrance, gas sensor,
Gas piping, first flow controller, second flow controller, vortex mixer and controller；
The vortex mixer includes that first entrance, second entrance and vortex mixer outlet, the first flow controller are set to described
On gas piping between zero gas entrance and the first entrance, the second flow controller is set to the under test gas and enters
On gas piping between mouth and the second entrance, the gas sensor is set to the gas of vortex mixer outlet connection
On pipeline, the first flow controller, the second flow controller and the gas sensor respectively with the controller
Communication connection, the vortex mixer are electrically connected with the controller.
2. gas concentration measuring apparatus according to claim 1, which is characterized in that zero gas does not contain the gas to be measured
Body or interference gas.
3. gas concentration measuring apparatus according to claim 1, which is characterized in that the controller can be according to the gas
The concentration value of the under test gas of body sensor detection is passed through the gas sensor by first flow controller control
The flow of zero gas, and the flow for being passed through the under test gas of the gas sensor is controlled by the second flow controller.
4. gas concentration measuring apparatus according to claim 1, which is characterized in that further include:
First valve and the second valve, first valve are set between the vortex mixer outlet and the gas sensor
Gas pipeline, second valve are set to the gas pipeline after the gas sensor, first valve and described
Two valves are electrically connected with the controller respectively；
The controller is also used to control opening or closing for first valve and second valve.
5. gas concentration measuring apparatus according to claim 4, which is characterized in that further include:
Emptier, second valve connect the emptier by the gas piping.
6. gas concentration measuring apparatus according to claim 4, which is characterized in that the gas concentration measuring apparatus does not have to
When detecting under test gas, the controller is also used to control zero gas by the first flow controller and is passed through and cleans described
After gas sensor, controls first valve and second valve is closed.
7. gas concentration measuring apparatus according to claim 1, which is characterized in that the controller be also used to it is described to
It is the by the flow value of zero gas that first flow controller control is passed through when surveying the concentration value of gas and being greater than given threshold
One setting value, so that the testing result of the gas sensor is in default value section.
8. gas concentration measuring apparatus according to claim 7, which is characterized in that the controller is also used to determination and is passed through
The concentration value of the under test gas after zero gas, is passed through the concentration value of the under test gas after zero gas are as follows: y2=y1/ (m/ (m+n))；
Wherein, y2 is the concentration value of the under test gas after being passed through zero gas, and y1 is the gas sensor detection before being passed through zero gas
Under test gas concentration value, m be the under test gas flow value, n be first setting value.
9. gas concentration measuring apparatus according to claim 1, which is characterized in that the controller is also used to by described
First flow controller controls zero gas and is passed through the gas sensor, obtains the corresponding detected value of the gas sensor, and root
The gas sensor is corrected according to the detected value.
10. a kind of control method of gas concentration measuring apparatus, which is characterized in that the gas concentration measuring apparatus includes: zero
Gas entrance, under test gas entrance, gas sensor, gas piping, first flow controller, second flow controller, vortex mixer
And controller；The vortex mixer includes that first entrance, second entrance and vortex mixer outlet, the first flow controller are set to
On gas piping between the zero gas entrance and the first entrance, the second flow controller is set to the gas to be measured
On gas piping between body entrance and the second entrance, the gas sensor is set to vortex mixer outlet connection
On gas piping, the first flow controller, the second flow controller and the gas sensor respectively with the control
Device communication connection processed, the vortex mixer are electrically connected with the controller；
The control method includes:
The concentration value for the under test gas that the controller is detected according to the gas sensor passes through the first flow controller
Control is passed through the flow of zero gas of the gas sensor, and is passed through the gas by second flow controller control
The flow of the under test gas of sensor.
11. the control method of gas concentration measuring apparatus according to claim 10, which is characterized in that the gas concentration
Measuring device further include: the first valve and the second valve, first valve are set to the vortex mixer outlet and the gas
Gas pipeline between sensor, second valve are set to the gas pipeline after the gas sensor, and described first
Valve and second valve are electrically connected with the controller respectively；
The control method further include:
The controller controls opening or closing for first valve and second valve.
12. the control method of gas concentration measuring apparatus according to claim 11, which is characterized in that the control method
Further include:
When the gas concentration measuring apparatus is not used in detection under test gas, the controller passes through the first flow controller
It controls after zero gas is passed through and cleans the gas sensor, controls first valve and second valve is closed.
13. the control method of gas concentration measuring apparatus according to claim 10, which is characterized in that the control method
Further include:
The controller is controlled when the concentration value of the under test gas is greater than given threshold by the first flow controller
The flow value for zero gas being passed through is the first setting value, so that the testing result of the gas sensor is in default value section.
14. the control method of gas concentration measuring apparatus according to claim 13, which is characterized in that the control method
Further include:
The controller determination is passed through the concentration value of the under test gas after zero gas, is passed through the concentration of the under test gas after zero gas
Value are as follows: y2=y1/ (m/ (m+n))；
Wherein, y2 is the concentration value of the under test gas after being passed through zero gas, and y1 is the gas sensor detection before being passed through zero gas
Under test gas concentration value, m be the under test gas flow value, n be first setting value.
15. the control method of gas concentration measuring apparatus according to claim 10, which is characterized in that the control method
Further include:
The controller controls the flow that zero gas is passed through zero gas of the gas sensor by the first flow controller, obtains
The corresponding detected value of concentration value of zero gas of the gas sensor detection is taken, and according to the concentration value school of zero gas of detected value
The just described gas sensor.
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