CN102043001B - Gas concentration detection method and gas concentration detector for the same - Google Patents
Gas concentration detection method and gas concentration detector for the same Download PDFInfo
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- CN102043001B CN102043001B CN201010506766.9A CN201010506766A CN102043001B CN 102043001 B CN102043001 B CN 102043001B CN 201010506766 A CN201010506766 A CN 201010506766A CN 102043001 B CN102043001 B CN 102043001B
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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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
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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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/122—Circuits particularly adapted therefor, e.g. linearising circuits
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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
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/12—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body in dependence upon absorption of a fluid; of a solid body in dependence upon reaction with a fluid, for detecting components in the fluid
- G01N27/125—Composition of the body, e.g. the composition of its sensitive layer
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
Abstract
The present invention relates to a gas concentration detection method and a gas concentration detector for the same, wherein the gas concentration detection method comprises the following steps: a gas injection step (S20) of injecting the gas to be detected into a space in which a gas sensor (313) is configured; a first output voltage acquiring step (S30) of detecting an output voltage (VL) which is taken as a voltage across two ends of a load resistor (RL) that is connected with the gas sensor (313) in series along with the injection time lapse of the gas to be detected thereby obtaining a first output voltage which is taken as the output voltage (VL) according to the injection time lapse; a gas absorption amount calculation step (S40) of calculating a gas absorption amount that is used as the amount of the gas absorbed on the gas sensor (313) based on the first output voltage; and a gas concentration calculation step (S50) of calculating the concentration of the gas to be detected, which is injected in the gas injection step (S20), according to the gas absorption mount.
Description
Technical field
The present invention relates to detect gas concentration detection method and the gas concentration detection apparatus of the concentration of mephitic gas.
Background technology
In for society, because lasting industrialization and urbanization cause the increase of environomental pollution source, therefore for Environmental Technology, constantly study and Environmental Industry is dropped into constantly.Under this situation, the semi-conductor type gas sensor in advance perception prevention as the harmful gas of environomental pollution source constantly improves, to tackle various factors.Meanwhile, also disclose for the method for evaluating performance of the gas sensor of exploitation and from the output signal data of perception, calculate the method for the concentration (C) of gas.
The performance evaluation of normally used semi-conductor type gas sensor is as the proportion expression of output voltage (Vgas), resistance (Rgas) or resistance variations (Rx) after the voltage (Vair) of the output valve before gas inject gas sensor or resistance (Rair) and injecting gas, has following relational expression.
[mathematical expression 1]
S＝Vair/Vgas，S＝Vgas/Vair，S＝Rair/Rgas，S＝Rgas/Rair
[mathematical expression 2]
S＝(Vair-Vgas)/Vair，S＝(Vair-Vgas)/Vgas，S＝(Rair-Rgas)/Rair，S＝(Rair-Rgas)/Rgas
[mathematical expression 3]
S＝Rgas/Rx
But, existing evaluation method only utilizes gas inject gas sensor output valve (Vair, Rair) before and the simple proportion expression of injecting gas output valve (Vgas, Rgas, Rx) afterwards to evaluate the performance of gas sensor, therefore conventionally due to the initial output valve changing along with testing environment, cannot evaluate objectively the performance of gas sensor.And, in the manufacture process of gas sensor, because the resistance value of all gas sensor is inconsistent, therefore exist each gas sensor to possess the problem points of different output characteristics.That is, the proportion expression before and after injecting gas shows as value miscellaneous, therefore cannot use unified method of evaluating performance.And while repeatedly injecting gas to be measured in the cycle with certain, the output valve of the gas sensor of each moment is not identical, therefore there is the remarkable problem reducing of sensitivity repeatability as the main necessary condition of gas sensor.
Although the output characteristics of semi-conductor type gas sensor depends mainly on the initial resistivity value (RS) of gas sensor and the gas concentration (C) of injecting, in existing method, with described Main Factors (RS, C), do not clearly state output characteristics.Because described initial resistivity value (RS) is the value that cannot know in the fabrication phase, though therefore can infer by the electrical output of explanation gas sensor the gas concentration (C) of injection, but owing to not defining clearly for output characteristics, when inferring gas concentration (C), be faced with many difficulties.
Summary of the invention
The present invention proposes in order to address the above problem, and its object is to provide gas concentration detection method and the gas concentration detection apparatus that can detect more exactly gas concentration.
For the attainment of one's purpose, gas concentration detection method provided by the invention comprises: gas inject step S20, injects gas to be measured to the space that is furnished with gas sensor 313; The first output voltage obtaining step S30, along with flowing of the injection length of described gas to be measured, detects as the pull-up resistor R that is series at described gas sensor 313
lthe output voltage V of the voltage between two ends
lthereby, obtain conduct according to the described output voltage V flowing of described gas injecting time to be measured
lthe first output voltage; Gas absorption amount calculation procedure S40, calculates as described gas absorption to be measured in the gas absorption amount of the amount of described gas sensor 313 based on described the first output voltage; And gas concentration calculation procedure S50, utilize described gas absorption amount to calculate the concentration of the described gas to be measured injecting at described gas inject step S20.
In the present invention, before described gas inject step S20, can also comprise the first odorless air Injection step S10 that injects the first odorless air to the space that is furnished with gas sensor 313.
In the present invention, can also comprise: the second odorless air Injection step S60, after carrying out described gas absorption amount calculation procedure S40, injects the second odorless air to the space that is furnished with gas sensor 313; The second output voltage obtaining step S70, along with flowing of the injection length of described the second odorless air, detects described output voltage V
lthereby, obtain conduct according to the described output voltage V flowing of described the second odorless air Injection time
lthe second output voltage; Desorbing gas amount calculation procedure S80, calculates as described gas to be measured and comes off in the desorbing gas amount of the amount of described gas sensor 313 based on described the second output voltage; And sensor performance determining step S90, by the described gas absorption amount relatively calculating at described gas absorption amount calculation procedure S40 and the described desorbing gas amount calculating at described desorbing gas amount calculation procedure S80, judge the performance of described gas sensor 313.
In the present invention, injecting time of described the second odorless air can be longer than the time of the described gas to be measured of injection of described gas inject step S20.
In the present invention, described gas absorption amount calculation procedure S40 can also comprise: the first output voltage fluctuation rate obtaining step S42, obtains conduct according to the described output voltage V flowing of described gas injecting time to be measured based on described the first output voltage
lthe first output voltage fluctuation rate of the rate of change; The first output voltage fluctuation rate accumulated value obtaining step S44, obtains the first output voltage fluctuation rate accumulated value as the value of the described first output voltage fluctuation rate of accumulating according to flowing of described gas injecting time to be measured based on described the first output voltage fluctuation rate.
In the present invention, described desorbing gas amount calculation procedure S80 can also comprise: the second output voltage fluctuation rate obtaining step S82, obtains conduct according to the described output voltage V flowing of described the second odorless air Injection time based on described the second output voltage
lthe second output voltage fluctuation rate of the rate of change; The second output voltage fluctuation rate accumulated value obtaining step S84, obtains the second output voltage fluctuation rate accumulated value as the value of the described second output voltage fluctuation rate of accumulating according to flowing of described the second odorless air Injection time based on described the second output voltage fluctuation rate.
In the present invention, described gas concentration calculation procedure S50 can comprise the step that derives the concentration of described gas to be measured from the characteristic relation between described gas absorption amount and described gas concentration to be measured.
In the present invention, described characteristic relation can draw by the sample gas adsorbance of described gas absorption amount as detecting for a plurality of testing sample gas and the regression analysis between the concentration of described testing sample gas.
For the attainment of one's purpose, gas concentration detection apparatus provided by the invention comprises: gas sensor; Gas injection apparatus 100, for injecting gas to be measured to the space that is furnished with described gas sensor 313; Gas absorption amount computing unit 411, along with flowing of the injection length of described gas to be measured, detects as the pull-up resistor R that is series at described gas sensor 313
lthe output voltage V of the voltage between two ends
l, using the gas absorption amount to the amount of described gas sensor 313 as described gas absorption to be measured of calculating; And gas concentration computing unit 420, the adsorbance of the described gas to be measured calculating based on described gas absorption amount computing unit 411 is calculated the concentration of the described gas to be measured injecting from described gas injection apparatus 100.
In the present invention, described gas absorption amount computing unit 411 obtains conduct according to the described output voltage V flowing of described gas injecting time to be measured
lthe first output voltage, and obtain as according to the described output voltage V flowing of described gas injecting time to be measured based on described the first output voltage
lthe first output voltage fluctuation rate of the rate of change, based on described the first output voltage fluctuation rate, obtain the first output voltage fluctuation rate accumulated value as the value of accumulating described the first output voltage fluctuation rate according to flowing of described gas injecting time to be measured thus, and calculate described gas absorption amount based on described the first output voltage fluctuation rate accumulated value.
In the present invention, can comprise: odorless air injection device 200, in order to inject odorless air to the space that is furnished with gas sensor 313; Desorbing gas amount computing unit 412, along with flowing of the injection length of described odorless air, detects described output voltage V
l, using to calculate as described gas to be measured and come off in the desorbing gas amount of the amount of described gas sensor 313; And sensor performance judging unit 430, the described desorbing gas amount that the described gas absorption amount that more described gas absorption amount computing unit 411 calculates and described desorbing gas amount computing unit 412 calculate, to judge the performance of described gas sensor 313.
In the present invention, described desorbing gas amount computing unit 412 obtains conduct according to the described output voltage V flowing of described odorless air Injection time
lthe second output voltage, and obtain as according to the described output voltage V flowing of described odorless air Injection time based on described the second output voltage
lthe second output voltage fluctuation rate of the rate of change, based on described the second output voltage fluctuation rate, obtain the second output voltage fluctuation rate accumulated value as the value of accumulating described the second output voltage fluctuation rate according to flowing of described odorless air Injection time thus, and calculate described desorbing gas amount based on described the second output voltage fluctuation rate accumulated value.
In the present invention, described odorless air injection device 200 can comprise: the bottom that is arranged at removably the box body 1100 of the profile that forms described gas concentration detection apparatus, and the lower side that is provided with screen cloth (mesh) is exposed to the bottom of described box body 1100, the upside that is provided with screen cloth (mesh) is connected in for inject the active carbon filter 210 of the air duct 220 of odorless air to the space that is furnished with described gas sensor 313.
In the present invention, can comprise the some selector valve V that are optionally connected in described gas injection apparatus 100 and described odorless air injection device 200, for by described gas to be measured and the airborne some spaces that is provided with described gas sensor 313 that optionally flows into of described odorless.
In the present invention, described gas injection apparatus 100 can comprise: gas to be measured sucks unit 110, be arranged at the outside of the box body 1100 of the profile that forms described gas concentration detection apparatus, and form thermometer screen structure, so that more than the gas to be measured containing in atmosphere is detained predefined special time; Gas introduction tube 120 to be measured, is connected in described gas to be measured and sucks unit 110, so that the gas described to be measured that is stranded in described gas suction to be measured unit 110 is guided to selector valve V; Dust removal filter 130; Be arranged on described gas introduction tube to be measured 120, in order to remove the dust in described gas to be measured; And moisture scavenge unit 140, be arranged in described gas introduction tube 120, in order to remove the moisture in described gas to be measured.
The present invention can comprise: the box body 1100 that forms the profile of described gas concentration detection apparatus; Built-in described gas absorption amount computing unit 411, described gas concentration computing unit 420, described desorbing gas amount computing unit 412 and described sensor performance judging unit 430, and possess at least showing the display window 440 of the information of the concentration that comprises described gas to be measured, and be arranged at the inside of described box body 1100, in order to control the injection length of described gas to be measured and the startup of described gas concentration detection apparatus (on) and to stop the mainboard (main board) 400 of (off); Be connected in described mainboard (main board) 400 and be arranged at the wireless terminal 500 of the inside of described box body, for transmit the information of the concentration that comprises described gas to be measured to outside, and control the injection length of described gas to be measured and the startup of described gas concentration detection apparatus (on) and stop (off) according to external signal; Temperature in described box body 110 when following, is carried out heat release in the first design temperature, so that the temperature of described box body 1100 inside maintains the heating module (heating block) 610 of predetermined temperature; In the temperature of described box body 1100 inside in the second design temperature when above, to outside and the temperature of described box body 1100 inside is declined, make thus the temperature of described box body 1100 inside maintain the blowing fan (fan) 520 of predetermined temperature the Bas Discharged of described box body 1100 inside; In order to the air in atmosphere is introduced to the outer gas of described box body 1100 inside, flow into unit 630; In order to by the Bas Discharged of described box body 110 inside to the interior gas deliverying unit 640 in atmosphere.
In the present invention, described gas concentration computing unit 420 can utilize characteristic relation between described gas absorption amount and the concentration of described gas to be measured to obtain the concentration of described gas to be measured.
In the present invention, described characteristic relation can draw by the sample gas adsorbance of described gas absorption amount as detecting for a plurality of testing sample gas and the regression analysis between the concentration of described testing sample gas.
In sum, by technical scheme of the present invention, can access following effect.
First, the adsorbance based on being adsorbed onto the gas of gas sensor is calculated the mode of gas concentration, even if concentration increases and increased frequency repeatedly, also can present low relative standard deviation, thereby have advantages of that repeatability is outstanding.
In the present invention, inject the odorless air Injection step of odorless air and implemented before injecting gas to be measured, therefore have advantages of and can remove the dusty gas sticking on gas sensor.And, when injecting odorless air, can detect the gas flow coming off in the perception surface of gas sensor, there is thus the pollution level that can backstepping goes out air at ordinary times.
And, by comparing adsorbance and desorption rate, there is the performance that can evaluate gas sensor.
Accompanying drawing explanation
Fig. 1 is the block scheme of structure that schematically illustrates the major part of the first embodiment;
Fig. 2 is the side view for the connection status of the portion gas sensor of key diagram 1;
Fig. 3 is the arrangenent diagram of electric chemical formula detecting sensor and the sensor chromatography curve map of this sensor of the perception surface passage that is vertically installed in sensing unit;
Fig. 4 is the arrangenent diagram of electric chemical formula detecting sensor and the sensor chromatography curve map of this sensor of the perception surface passage that is vertically installed in sensing unit;
Fig. 5 is the concise and to the point pie graph of the first embodiment;
Fig. 6 is the process flow diagram of the second embodiment;
Fig. 7 is the curve map of the first output voltage and the curve map of the second output voltage;
Fig. 8 is the curve map of the first output voltage fluctuation rate and the curve map of the second output voltage fluctuation rate;
Fig. 9 is the curve map of the first output voltage fluctuation rate accumulated value and the curve map of the second output voltage fluctuation rate accumulated value.
Main symbol description: 100 is gas injection apparatus, 110 is that gas to be measured sucks unit, 120 is gas introduction tube to be measured, 130 is dust removal filter, 140 is moisture scavenge unit, 200 is odorless air injection device, 210 is active carbon filter, 220 is air duct, 313 is gas sensor (gas sensor), 400 is mainboard (main board), 411 is gas absorption amount computing unit, 412 is desorbing gas amount computing unit, 420 is gas concentration computing unit, 430 is sensor performance judging unit, 500 is wireless terminal, 610 is heater module (heating block), 620 is blowing fan (fan), 630 is that outer gas flows into unit, 640 is interior gas deliverying unit, 1100 is box body.
Embodiment
Below, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
But, when the present invention will be described, for illustrating of known function or composition, will be omitted, in order to avoid obscure purport of the present invention.
The first embodiment
The first embodiment relates to according to gas concentration detection apparatus of the present invention.
Fig. 1 is the block scheme of structure that schematically illustrates the major part of the first embodiment, Fig. 2 is the side view for the connection status of the portion gas sensor of key diagram 1, Fig. 3 is the arrangenent diagram of electric chemical formula detecting sensor and the sensor chromatography curve map of this sensor of the perception surface passage that is vertically installed in sensing unit, Fig. 4 is the arrangenent diagram of electric chemical formula detecting sensor and the sensor chromatography curve map of this sensor of the perception surface level passage that is arranged at sensing unit, and Fig. 5 is the concise and to the point pie graph of the first embodiment.
Known with reference to Fig. 1, the first embodiment comprises: gas injection apparatus 100, odorless air injection device 200, gas sensor unit 310, gas flow calculate unit 410, gas concentration computing unit 420.
The sensor unit passage 311 known with reference to Fig. 1, gas sensor unit 310 comprises gas sensor 313 and is furnished with gas sensor 313.Gas sensor 313 can be on sensor unit passage 31, be separated by arrange and a plurality of gas sensor 313-1, the 313-2 of series connection ..., 313-8,313-9.Gas sensor 313 can comprise semiconductor (Semiconductor) type gas sensor, galvanochemistry (Electrochemical) type gas sensor and photoion (Photo ionization) type gas sensor.
Known with reference to Fig. 1, Fig. 2 and Fig. 3, gas sensor 313-2,313-7 in a plurality of gas sensors 313,313-8,313-9 are galvanochemistry (Electrochemical) type gas sensor, be arranged in the position of sensor unit passage bending, so that the perception of gas sensor 313 surface 313a is perpendicular to the flow direction of fluid.
Known with reference to Fig. 3 and Fig. 4, as gas sensor 313-2, the 313-7 of galvanochemistry (Electrochemicai) type gas sensor, the perception of 313-8,313-9 surface 313a is higher when its perception efficiency is compared perception surface 313a and is parallel to the flow direction of fluid during perpendicular to the flow direction of fluid.This point can be confirmed by the curve of Fig. 3 and Fig. 4.
Known with reference to Fig. 1, gas injection apparatus 100 is for the device to sensor unit passage 311 by gas inject to be measured, and odorless air injection device 200 is for the device to sensor unit passage 311 by odorless air Injection.
Known with reference to Fig. 1, gas flow calculates unit 410 and comprises gas absorption amount computing unit 411 and desorbing gas amount computing unit 412.Gas absorption amount computing unit 411 and desorbing gas amount computing unit 412 can be identical devices.
Gas absorption amount computing unit 411, detects as the pull-up resistor R that is connected in series in the internal resistance of gas sensor 313 to the flowing of time of sensor unit passage 311 (with reference to Fig. 3) according to gas inject to be measured
lthe output voltage V of the voltage between (with reference to Fig. 3) two ends
l(with reference to Fig. 3).Gas absorption amount computing unit 411 is output voltage V that flow and detect of utilizing according to gas injecting time to be measured
l(with reference to Fig. 3) calculates as gas absorption to be measured the device to the gas absorption amount of the amount of gas sensor 313 within the time of gas inject to be measured.The described gas absorption amount of method calculate to(for) gas absorption amount computing unit 411 will describe by the second embodiment.
Desorbing gas amount computing unit 412, detects as pull-up resistor R to the flowing of time of sensor unit passage 311 (with reference to Fig. 3) according to odorless air Injection
lthe output voltage V of the voltage between (with reference to Fig. 3) two ends
l(with reference to Fig. 3).Desorbing gas amount computing unit 412 is output voltage V that flow and detect of utilizing according to the odorless air Injection time
l(with reference to Fig. 3), the device of the desorbing gas amount of the amount that calculating comes off from gas sensor 313 as gas to be measured within the time of odorless air Injection.The described gas absorption amount of method calculate to(for) desorbing gas amount computing unit 412 will describe by the second embodiment.
Known with reference to Fig. 1, the characteristic relation of gas concentration computing unit 420 based between described gas absorption amount and gas concentration to be measured calculates the concentration of gas to be measured.The concentration of gas to be measured of method calculate to(for) gas concentration computing unit 420 will describe by the second embodiment.
The described desorbing gas amount known with reference to Fig. 1, the described gas absorption amount that sensor performance judging unit 430 calculates by comparison gas adsorbance computing unit 411 and described desorbing gas amount computing unit 412 calculate, the performance of judgement gas sensor 313.For the method that judges the performance of gas sensor 313, will describe by the second embodiment.
Known with reference to Fig. 1, in the first embodiment, possess the some selector valve V that are optionally connected in gas injection apparatus 100 and odorless air injection device 200.By the operation of selector valve V, gas to be measured and odorless are airborne somely will be optionally injected into sensor unit passage 311.Thus, after calculating gas concentration to be measured, by operated selector valve V, inject odorless air, thus the gas sensor 313 capable of washing line stabilization of going forward side by side.Accordingly, can maintain the accuracy of detection of gas sensor 313, and increase the life-span of gas sensor 313.For strengthening is to resistibility and the permanance polluted, selector valve V can adopt as the Teflon of uncontamination material and stainless steel.Accordingly, even if long-time use can not caused the problems such as absorption, corrosion and pollution yet.
Known with reference to Fig. 5, the first embodiment possesses the box body 1100 of the profile that forms gas concentration detection apparatus.Before described box body 1100, be equipped with box body door (door) (not shown).Box body 1100 forms to expose for a long time time corrosion and impaired less stainless steel (Steel Use Stainless, SUS) material.Although do not illustrate in figure, on box body 1100, be connected with for outside bracing frame is fixed and be supported in to box body 1100, and also can arrange, be connected to outside line on bracing frame, for strengthening the stationary state of this bracing frame.
Known with reference to Fig. 1 and Fig. 5, odorless air injection device 200 comprises and being arranged on for sucking the active carbon filter 210 of the air duct 220 of atmospheric air, to remove the smell of atmospheric air.Thus, can remove the smell in atmospheric air.Active carbon filter 210 is arranged at the bottom of box body 1100 removably, and the lower side that is provided with screen cloth is exposed to the bottom of box body 1100, the upside that is provided with screen cloth is connected to for inject the air duct 220 of odorless air to the space that is provided with gas sensor 313.According to screen cloth, the powder of activated charcoal will can not flow into air duct 220.In addition, odorless air injection device 200 can also consist of other tank body, and odorless air is directly provided thus.But the problem points now with increase expense.
Known with reference to Fig. 5, gas injection apparatus 100 possesses the gas suction to be measured unit 110 that is arranged at box body 1100 outsides, to suck gas to be measured.Gas to be measured sucks unit 1100 and forms thermometer screen structures, so that more than the gas to be measured containing in atmosphere is detained predefined special time.Thus, can prevent that the gas to be measured containing in atmosphere is diffused in the clean air in atmosphere and causes being diluted to below mean concentration.At gas to be measured, suck unit 110 and be connected in gas introduction tube 120 to be measured, for sucked gas to be measured is guided to selector valve V (with reference to Fig. 1).
Known with reference to Fig. 1, in gas introduction tube 120 to be measured, also can be provided for removing the dust removal filter 130 of the dust be contained in gas to be measured and for removing the moisture scavenge unit 140 of the moisture that is contained in gas to be measured.Dust removal filter 130 can comprise the first dust removal filter 130-1 and the second dust removal filter 130-2 of the front and back side that is arranged at moisture scavenge unit 140.The moisture of being removed by moisture scavenge unit 140 is discharged to outside by solenoid valve.
Known with reference to Fig. 1, in gas introduction tube 120 to be measured, can be provided for detecting the flowmeter 150 of flow.In addition, flowmeter 150 can not be arranged at gas introduction tube 120 to be measured and be arranged on sensor unit passage 311.
Known with reference to Fig. 5, the inside of box body 1100 is provided with mainboard (main board)) 400.On mainboard (main board) 400, be built-in with gas flow and calculate unit 410 (with reference to Fig. 1), gas concentration computing unit 420 (with reference to Fig. 1) and sensor performance judging unit 430 (with reference to Fig. 1).And, on mainboard (main board) 400, also possess display window 440, at least representing the information of the concentration of the gas to be measured that air inclusion concentration computing unit 420 (with reference to Fig. 1) calculates.On display window 440, can show to the SIG that means the transducing signal (SENSOR SIGNAL) as the relative changing value of gas sensor 313, mean Dilution air olfactometry (olfactometry) stench extension rate OU and mean the information that the OI etc. of stench intensity of Dilution air olfactometry is relevant.And, on display window 440, also can show concentration, the concentration of amine (Amine), the concentration of sulphur (Sulfur) etc. of the volatile organic compounds (Volatile Organic Compound) that is contained in gas to be measured.
And mainboard (main board) 400 is also carried out the function of controlling the injection length of gas to be measured and the startup of described gas concentration detection apparatus (on) and stopping (off).
Known with reference to Fig. 5, the inside of box body 1100 is provided with manifold system (manifold system) 300.Manifold system (manifold system) 300 comprises gas sensor 310 (with reference to Fig. 1).
Known with reference to Fig. 5, the inside of box body 1100 is also provided with wireless terminal 500, heating module (heating block) 610, blowing fan (fan) 620, outer gas inflow unit 630 and interior gas deliverying unit 640.
Known with reference to Fig. 5, the outer setting of box body 1100 is useful on the aerovane 710 of the wind direction of measuring air mobile in atmosphere and for measuring the wind gage 720 at the wind speed of the mobile air of atmosphere.
The second embodiment
The second embodiment is the gas concentration detection method that utilizes the first embodiment.
Fig. 6 is the process flow diagram of the second embodiment, Fig. 7 is the curve map of the first output voltage and the curve map of the second output voltage, Fig. 8 is the curve map of the first output voltage fluctuation rate and the curve map of the second output voltage fluctuation rate, and Fig. 9 is the curve map of the first output voltage fluctuation rate accumulated value and the curve map of the second output voltage fluctuation rate accumulated value.
Known with reference to Fig. 6, the second embodiment comprises the first odorless air Injection step S10.At the first odorless air Injection step S10, the sensor unit passage 311 that is provided with the space of gas sensor 313 by odorless air injection device 200 to conduct injects the first odorless air.Therefore,, in the first odorless air Injection step S10, selector valve V is optionally connected in odorless air injection device 200.In addition, if gas sensor 313 adsorptions have contaminated gas before injecting gas to be measured, can cause the sensitivity of gas sensor 313, thereby have the problem that cannot accurately measure the concentration of gas to be measured.Thus, before injecting gas to be measured, inject first without odour, remove and be adsorbed in the dusty gas of gas sensor 313 accordingly, thereby can measure exactly the concentration of gas to be measured.
Known with reference to Fig. 6, the second embodiment comprises gas inject step S20.At gas inject step S20, by gas injection apparatus 100, to sensor unit passage 311, inject gas to be measured.Therefore,, in gas inject step S20, selector valve V is optionally connected in gas injection apparatus 100.Along with the execution of gas inject step S20, gas absorption to be measured is in the perception surface of gas sensor 313 313a.
Known with reference to Fig. 6, the second embodiment comprises the first output voltage obtaining step S30.At the first output voltage obtaining step S30, along with injecting the flowing of time of gas to be measured, detect the output voltage V of gas sensor 313
lthereby, obtain as the mobile output voltage V corresponding to gas injecting time to be measured
lthe first output voltage.The P1 point of Fig. 7 and the curve table between P2 point are shown in the curve map of the first output voltage that the first output voltage institute obtaining step obtains.The first output voltage obtaining at the first output voltage obtaining step can be for each gas sensor 313-1,313-2 ... the output voltage V of 313-8,313-9
land or its mean value.Below, for the first output voltage obtaining at the first output voltage obtaining step be each gas sensor 313-1,313-2 ... the output voltage V of 313-8,313-9
land situation describe.
Known with reference to Fig. 6, the second embodiment comprises gas absorption amount calculation procedure S40.At gas absorption amount calculation procedure S40, based on the first output voltage, calculate the gas absorption amount to the amount of gas sensor 313 as gas absorption to be measured.Gas absorption amount be gas absorption to be measured to each gas sensor 313-1,313-2 ... the amount sum of 313-8,313-9.
Known with reference to Fig. 6, gas absorption amount calculation procedure S40 comprises the first output voltage fluctuation rate obtaining step S42 and the first output voltage fluctuation rate accumulated value obtaining step S44.
At the first output voltage fluctuation rate obtaining step S42, based on the first output voltage, obtain conduct according to the mobile output voltage V of gas injecting time to be measured
lthe first output voltage fluctuation rate of the rate of change.The Q1 point of Fig. 8 and the curve table between Q2 point are shown in the curve map of the first output voltage fluctuation rate that the first output voltage fluctuation rate obtaining step obtains.That is, the first output voltage fluctuation rate can represent by the P1 point of Fig. 7 and the degree of tilt of the curve between P2 point.
At the first output voltage fluctuation rate accumulated value obtaining step S44, based on the first output voltage fluctuation rate, obtain conduct according to the first output voltage fluctuation rate accumulated value of the value of the first output voltage fluctuation rate of accumulating that flows of gas injecting time to be measured.The area that the Q1 point that the area S1 of Fig. 9 is Fig. 8 and the curve between Q2 point and time shaft form, represents the first output voltage fluctuation rate accumulated value of gas injecting time section to be measured.The the first output voltage fluctuation rate accumulated value obtaining thus represent as along with the execution of gas inject step S20 gas to be measured be adsorbed onto respectively each gas sensor 313-1,313-2 ... the gas absorption amount of the amount sum of 313-8,313-9.According to the gas absorption amount computing method of the method, be called as sensor chromatography area and obtain method.
Known with reference to Fig. 6, the second embodiment comprises gas concentration calculation procedure S50.At gas concentration calculation procedure S50, utilize the gas absorption amount of obtaining at gas absorption amount calculation procedure S40 to calculate the concentration of the gas to be measured injecting at gas inject step S20.The gas absorption amount that the concentration utilization of gas to be measured is obtained in gas absorption amount calculation procedure S40 and the characteristic relation of gas concentration to be measured draw.Described characteristic relation can draw by the sample gas adsorbance of gas absorption amount as obtaining for a plurality of testing sample gas and the regression analysis between the concentration of described testing sample gas.This method is used in experiment statistics, therefore omits its detailed explanation.
Known with reference to Fig. 6, the second embodiment comprises the second odorless air Injection step S60.The second odorless air Injection step S60 carries out after carrying out gas absorption amount calculation procedure S40 or after carrying out gas concentration calculation procedure S50.At the second odorless gas inject step S60, by odorless air injection device 200, to the sensor unit passage 311 that is provided with gas sensor 313, inject the second odorless air.The second odorless air can be the odorless air identical with the first odorless air.In addition, in the second odorless air Injection step S60, selector valve V is optionally connected to odorless air injection device 200.
Known with reference to Fig. 6, the second embodiment comprises the second output voltage obtaining step S70.At the second output voltage obtaining step S70, along with injecting the flowing of time of odorless air, detect the output voltage V of gas sensor 313
lthereby, obtain as the output voltage V corresponding to the odorless air Injection time
lthe second output voltage.The P2 point of Fig. 7 and the curve table between P3 point are shown in the curve map of the second output voltage that the second output voltage obtaining step obtains.The second output voltage obtaining at the second output voltage obtaining step can be for each gas sensor 313-1,313-2 ... the output voltage V of 313-8,313-9
land.
Known with reference to Fig. 6, the second embodiment comprises desorbing gas amount calculation procedure S80.At desorbing gas amount calculation procedure S80, based on the second output voltage, calculate the desorbing gas amount of the amount coming off from gas sensor 313 as gas to be measured.Desorbing gas amount be adsorbed onto each gas sensor 313-1,313-2 ... the gas to be measured of 313-8,313-9 from each gas sensing tolerance 313-1,313-2 ... the amount sum that 313-8,313-9 come off.
Known with reference to Fig. 6, desorbing gas amount calculation procedure S80 comprises the second output voltage fluctuation rate obtaining step S82 and the second output voltage fluctuation rate accumulated value obtaining step S84.
At the second output voltage fluctuation rate obtaining step S82, based on the second output voltage, obtain conduct according to the mobile output voltage V of the second odorless air Injection time
lthe second output voltage fluctuation rate of the rate of change.The Q2 point of Fig. 8 and the curve table between Q3 point are shown in the curve map of the second output voltage fluctuation rate that the second output voltage fluctuation rate obtaining step obtains.That is, the second output voltage fluctuation rate can represent by the P2 point of Fig. 7 and the degree of tilt of the curve between P3 point.
At the second output voltage fluctuation rate accumulated value obtaining step S84, based on the second output voltage fluctuation rate, obtain conduct according to the second output voltage fluctuation rate accumulated value of the value of the second output voltage fluctuation rate of accumulating that flows of the second odorless air Injection time.The area that the Q2 point that the area S2 of Fig. 9 is Fig. 8 and the curve between Q3 point and time shaft form, represents the second output voltage fluctuation rate accumulated value of the second odorless air Injection time period.The the second output voltage fluctuation rate accumulated value obtaining thus represent as along with the execution of the second odorless air Injection step S60 gas to be measured respectively from each gas sensor 313-1,313-2 ... the desorbing gas amount of the amount sum that 313-8,313-9 come off.According to the desorbing gas amount computing method of the method, be called as sensor chromatography area and obtain method.
Known with reference to Fig. 6, the second embodiment comprises for judging the gas sensor performance determining step S90 of the performance of gas sensor 313.At gas sensor performance determining step S90, compare the gas absorption amount of calculating at gas absorption amount calculation procedure S40 and the desorbing gas amount of calculating at desorbing gas amount calculation procedure S80, judge thus the performance of gas sensor 313.For example, by the difference control of the gas absorption amount for gas sensor 313 and desorbing gas amount, be in 3% time, cause can reversibly be carried out absorption and the desorption for the gas to be measured of the perception surface 313a of gas sensor 313, thereby can be judged as the functional of gas sensor 313.Unlike this, when the difference of the gas absorption amount for gas sensor 313 and desorption rate reaches larger 3%～5% when above, because gas absorption to be measured does not come off after gas sensor 313, thereby it is bad to be judged as the performance of gas sensor 313.Whether and be provided to the index whether pipe arrangement of other gas concentration detection apparatus gets dirty the replacing that the performance of gas sensor 313 can be used as the active carbon filter 210 that is provided to odorless air injection device 200.
Although Fig. 6 is expression not, the second embodiment can also comprise the dusty gas desorption rate calculation procedure of calculating the amount departing from from gas sensor 313 as the dusty gas that is adsorbed on gas sensor 313 along with the execution of the first odorless air Injection step S10.Described dusty gas desorption rate calculation procedure can adopt with the similar method of desorbing gas amount calculation procedure S80 carries out.Thus, can detect the amount of the dusty gas coming off from the perception surface 313a of gas sensor 313, thus have advantages of can backstepping air at ordinary times dustiness.
Although Fig. 6 is expression not, the second embodiment can carry out the step from S20 to S80 repeatedly.The time of now, injecting the second odorless air at the second odorless air Injection step S60 can be greater than the time of injecting gas to be measured at gas inject step S20.The injection length that is greater than gas inject step S20 gas to be measured by making to inject the time of the second odorless air, can improve the sensitivity for the gas sensor 313 of gas to be measured.When gas to be measured injects sensor unit passage 311 for a long time, the gas flow to be measured that is adsorbed in the perception surface 313a of gas sensor 313 can increase, and will cause the characteristic of gas sensor 313 to change.Therefore, inject for a long time the second odorless air, make can not change for the desorbing gas amount of the perception surface 313a of gas sensor 313, now inject gas to be measured, can access value more accurately.
Following form illustrates the sulfuretted hydrogen (H that detects various concentration with existing voltage comparative approach
2s) value obtains with the sensor chromatography area with the second embodiment the sulfuretted hydrogen (H that method detects various concentration
2s) value.
[table 1] gas to be measured: H
2s 1ppm, gas sensor model: MICS5521 (manufacturer E2V， Switzerland)
| ? | Base(Vair) | Max(Vgas) | Vgas/Vair | Sout?Area |
| 1st | 1.57 | 2.10 | 1.34 | 50.4 |
| 2nd | 1.59 | 2.09 | 1.31 | 49.6 |
| 3rd | 1.62 | 2.08 | 1.28 | 50.5 |
| On average (Average) | 1.59 | 2.09 | 1.31 | 50.17 |
| Standard deviation (S.D) | 0.03 | 0.01 | 0.03 | 0.49 |
| Relative standard deviation (%RSD) | 1.58 | 0.48 | 2.05 | 0.98 |
The output voltage V of the gas sensor 313 when the Vair in upper table represents to be exposed to odorless air
l, the output voltage of the gas sensor 313 when Vgas represents to be exposed to gas to be measured, Sout_area represents to obtain according to sensor chromatography area the first output voltage fluctuation rate accumulated value and the gas absorption amount that method obtains.(following identical)
[table 2] gas to be measured: H
2s 5ppm, gas sensor model: MICS5521 (manufacturer E2V， Switzerland)
| ? | Base(Vair) | Max(Vgas) | Vgas/Vair | Sout?Area |
| 1st | 1.53 | 2.69 | 1.76 | 103.9 |
| 2nd | 1.60 | 2.55 | 1.59 | 106.7 |
| 3rd | 1.65 | 2.41 | 1.46 | 103.0 |
| On average (Average) | 1.59 | 2.55 | 1.60 | 104.53 |
| Standard deviation (S.D) | 0.06 | 0.14 | 0.15 | 1.93 |
| Relative standard deviation (%RSD) | 3.78 | 5.49 | 9.29 | 1.85 |
[table 3] gas to be measured: H
2s 10ppm,, gas sensor model: MICS 5521 (manufacturer E2V， Switzerland)
| ? | Base(Vair) | Max(Vgas) | Vgas/Vait | Sout?Area |
| 1st | 1.54 | 2.81 | 1.82 | 133.8 |
| 2nd | 1.67 | 2.71 | 1.62 | 129.8 |
| 3rd | 1.76 | 2.67 | 1.52 | 129.4 |
| On average (Average) | 1.66 | 2.73 | 1.65 | 131.00 |
| Standard deviation (S.D) | 0.11 | 0.07 | 0.16 | 2.43 |
| Relative standard deviation (%RSD) | 6.68 | 2.64 | 9.45 | 1.86 |
[table 4] gas to be measured: H
2s 1ppm, gas sensor model: TGS 2602 (Figaro research institute of manufacturer, Japan)
| ? | Base(Vair) | Max(Vgas) | Vgas/Vair | Sout?Area |
| 1st | 1.42 | 2.19 | 1.54 | 65.2 |
| 2nd | 1.44 | 2.10 | 1.46 | 68.4 |
| 3rd | 1.44 | 2.07 | 1.44 | 64.1 |
| On average (Average) | 1.43 | 2.12 | 1.48 | 65.90 |
| Standard deviation (S.D) | 0.01 | 0.06 | 0.06 | 2.23 |
| Relative standard deviation (%RSD) | 0.81 | 2.95 | 3.75 | 3.39 |
[table 5] gas to be measured: H
2s 5ppm, gas sensor model: TGS 2602 (Figaro research institute of manufacturer, Japan)
| ? | Base(Vair) | Max(Vgas) | Vgas/Vair | Sout?Area |
| 1st | 1.43 | 2.95 | 2.06 | 152.7 |
| 2nd | 1.48 | 2.94 | 1.99 | 150.5 |
| 3rd | 1.59 | 2.92 | 1.84 | 144.4 |
| On average (Average) | 1.50 | 2.94 | 1.96 | 149.20 |
| Standard deviation (S.D) | 0.08 | 0.02 | 0.12 | 4.30 |
| Relative standard deviation (%RSD) | 5.46 | 0.52 | 5.87 | 2.88 |
[table 6] gas to be measured: H
2s 10ppm, gas sensor model: TGS 2602 (Figaro research institute of manufacturer, Japan)
| ? | Base(Vair) | Max(Vgas) | Vgas/Vair | Sout?Area |
| 1st | 1.55 | 3.48 | 2.25 | 206.9 |
| 2nd | 1.65 | 3.55 | 2.15 | 204.6 |
| 3rd | 1.76 | 3.40 | 1.93 | 201.7 |
| On average (Average) | 1.65 | 3.48 | 2.11 | 204.40 |
| Standard deviation (S.D) | 0.11 | 0.08 | 0.16 | 2.61 |
| Relative standard deviation (%RSD) | 6.35 | 2.16 | 7.62 | 1.27 |
Result from above-mentioned [table 1] to [Fig. 6], existing voltage detecting mode is along with the change that detects the increase of number of times and produce Vair value, and the concentration of gas to be measured is higher, and the relative standard deviation of Vair value is just larger.
In contrast, even if sensor chromatography area acquisition methods increases and detects number of times increase in the concentration of gas to be measured, still embody lower relative standard deviation characteristic, therefore there is the outstanding feature of repeatability.
The preferred embodiments of the present invention have below been described by way of example, but scope of the present invention is not limited to such specific embodiment, can within the category that is recorded in claim scope, suitably changes.
Claims (18)
1. a gas concentration detection method, is characterized in that comprising:
Gas inject step, injects gas to be measured to the space that is furnished with gas sensor;
The first output voltage obtaining step, along with flowing of the injection length of described gas to be measured, detect as the output voltage that is series at the voltage between the pull-up resistor two ends of described gas sensor, thereby obtain as according to the first output voltage of the described output voltage flowing of described gas injecting time to be measured;
Gas absorption amount calculation procedure, calculates as described gas absorption to be measured in the gas absorption amount of the amount of described gas sensor based on described the first output voltage; And
Gas concentration calculation procedure, utilizes described gas absorption amount to calculate the concentration of the described gas to be measured injecting in described gas inject step.
2. gas concentration detection method according to claim 1, is characterized in that also comprising before described gas inject step the first odorless air Injection step from the first odorless air to the space that is furnished with described gas sensor that inject.
3. gas concentration detection method according to claim 1, characterized by further comprising:
The second odorless air Injection step, after carrying out described gas absorption amount calculation procedure, injects the second odorless air to the space that is furnished with described gas sensor;
The second output voltage obtaining step, along with flowing of the injection length of described the second odorless air, detects described output voltage, thereby obtains as according to the second output voltage of the described output voltage flowing of described the second odorless air Injection time;
Desorbing gas amount calculation procedure, calculates as described gas to be measured and comes off in the desorbing gas amount of the amount of described gas sensor based on described the second output voltage; And
Sensor performance determining step, by the described gas absorption amount relatively calculating in described gas absorption amount calculation procedure and the described desorbing gas amount calculating in described desorbing gas amount calculation procedure, judges the performance of described gas sensor.
4. gas concentration detection method according to claim 3, the time of the described gas to be measured of injection of relatively described gas inject step of time that it is characterized in that injecting described the second odorless air is longer.
5. according to the gas concentration detection method described in any one in claim 1 to 4, it is characterized in that described gas absorption amount calculation procedure also comprises:
The first output voltage fluctuation rate obtaining step, obtains conduct according to the first output voltage fluctuation rate of the rate of change of the described output voltage flowing of described gas injecting time to be measured based on described the first output voltage;
The first output voltage fluctuation rate accumulated value obtaining step, obtains the first output voltage fluctuation rate accumulated value as the value of accumulating described the first output voltage fluctuation rate according to flowing of described gas injecting time to be measured based on described the first output voltage fluctuation rate.
6. gas concentration detection method according to claim 3, is characterized in that described desorbing gas amount calculation procedure can also comprise:
The second output voltage fluctuation rate obtaining step, obtains conduct according to the second output voltage fluctuation rate of the rate of change of the described output voltage flowing of described the second odorless air Injection time based on described the second output voltage;
The second output voltage fluctuation rate accumulated value obtaining step, obtains the second output voltage fluctuation rate accumulated value as the value of accumulating described the second output voltage fluctuation rate according to flowing of described the second odorless air Injection time based on described the second output voltage fluctuation rate.
7. according to the gas concentration detection method described in any one in claim 1 to 4, it is characterized in that described gas concentration calculation procedure comprises the step that derives the concentration of described gas to be measured from the characteristic relation between described gas absorption amount and described gas concentration to be measured.
8. gas concentration detection method according to claim 7, is characterized in that described characteristic relation draws by the sample gas adsorbance of described gas absorption amount as detecting for a plurality of testing sample gas and the regression analysis between the concentration of described testing sample gas.
9. a gas concentration detection apparatus, is characterized in that comprising:
Gas sensor;
Gas injection apparatus, for injecting gas to be measured to the space that is furnished with described gas sensor;
Gas absorption amount computing unit, along with flowing of the injection length of described gas to be measured, detect as the output voltage that is series at the voltage between the pull-up resistor two ends of described gas sensor, using the gas absorption amount to the amount of described gas sensor as described gas absorption to be measured of calculating; And
Gas concentration computing unit, the adsorbance of the described gas to be measured calculating based on described gas absorption amount computing unit is calculated the concentration of the described gas to be measured injecting from described gas injection apparatus.
10. gas concentration detection apparatus according to claim 9, it is characterized in that described gas absorption amount computing unit obtains conduct according to the first output voltage of the described output voltage flowing of described gas injecting time to be measured, and obtain conduct according to the first output voltage fluctuation rate of the rate of change of the described output voltage flowing of described gas injecting time to be measured based on described the first output voltage, based on described the first output voltage fluctuation rate, obtain the first output voltage fluctuation rate accumulated value as the value of accumulating described the first output voltage fluctuation rate according to flowing of described gas injecting time to be measured thus, and calculate described gas absorption amount based on described the first output voltage fluctuation rate accumulated value.
11. according to the gas concentration detection apparatus described in claim 9 or 10, it is characterized in that comprising:
Odorless air injection device, in order to inject odorless air to the space that is furnished with gas sensor;
Desorbing gas amount computing unit, along with flowing of the injection length of described odorless air, detects described output voltage, usings to calculate as described gas to be measured to come off in the desorbing gas amount of the amount of described gas sensor; And
Sensor performance judging unit, the described desorbing gas amount that the described gas absorption amount that more described gas absorption amount computing unit calculates and described desorbing gas amount computing unit calculate, to judge the performance of described gas sensor.
12. gas concentration detection apparatus according to claim 11, it is characterized in that described desorbing gas amount computing unit obtains conduct according to the second output voltage of the described output voltage flowing of described odorless air Injection time, and obtain conduct according to the second output voltage fluctuation rate of the rate of change of the described output voltage flowing of described odorless air Injection time based on described the second output voltage, based on described the second output voltage fluctuation rate, obtain the second output voltage fluctuation rate accumulated value as the value of accumulating described the second output voltage fluctuation rate according to flowing of described odorless air Injection time thus, and calculate described desorbing gas amount based on described the second output voltage fluctuation rate accumulated value.
13. gas concentration detection apparatus according to claim 12, it is characterized in that described odorless air injection device comprises: the bottom that is arranged at removably the box body of the profile that forms described gas concentration detection apparatus, and the lower side that is provided with screen cloth is exposed to the bottom of described box body, the upside that is provided with screen cloth is connected in for inject the active carbon filter of the air duct of odorless air to the space that is furnished with described gas sensor.
14. gas concentration detection apparatus according to claim 12, it is characterized in that comprising the some selector valves that are optionally connected in described gas injection apparatus and described odorless air injection device, for by described gas to be measured and the airborne some spaces that is provided with described gas sensor that optionally flows into of described odorless.
15. gas concentration detection apparatus according to claim 12, is characterized in that described gas injection apparatus comprises:
Gas to be measured sucks unit, is arranged at the outside of the box body of the profile that forms described gas concentration detection apparatus, and forms thermometer screen structure, so that more than the gas to be measured containing in atmosphere is detained predefined special time;
Gas introduction tube to be measured, is connected in described gas to be measured and sucks unit, so that the gas described to be measured that is stranded in described gas suction to be measured unit is guided to selector valve;
Dust removal filter, is arranged on described gas introduction tube to be measured, in order to remove the dust in described gas to be measured; And
Moisture scavenge unit, is arranged in described gas introduction tube, in order to remove the moisture in described gas to be measured.
16. gas concentration detection apparatus according to claim 12, is characterized in that comprising:
Form the box body of the profile of described gas concentration detection apparatus;
Built-in described gas absorption amount computing unit, described gas concentration computing unit, described desorbing gas amount computing unit and described sensor performance judging unit, and possess at least showing the display window of the information of the concentration that comprises described gas to be measured, and be arranged at the inside of described box body, in order to the mainboard of controlling the injection length of described gas to be measured and the startup of described gas concentration detection apparatus and stopping;
Be connected in described mainboard and be arranged at the wireless terminal of the inside of described box body, for transmit the information of the concentration that comprises described gas to be measured to outside, and control the injection length of described gas to be measured and the startup of described gas concentration detection apparatus and stop according to external signal;
In the temperature of described box body inside, in the first design temperature, when following, carry out heat release, so that the temperature of described box body inside maintains the heating module of predetermined temperature;
In the temperature of described box body inside, in the second design temperature when above, to outside and the temperature of described box body inside is declined, make thus the temperature of described box body inside maintain the blowing fan of predetermined temperature the Bas Discharged of described box body inside;
In order to the air in atmosphere is introduced to the outer gas of described box body inside, flow into unit;
In order to by the Bas Discharged of described box body inside to the interior gas deliverying unit in atmosphere.
17. gas concentration detection apparatus according to claim 12, is characterized in that described gas concentration computing unit utilizes characteristic relation between described gas absorption amount and the concentration of described gas to be measured to obtain the concentration of described gas to be measured.
18. gas concentration detection apparatus according to claim 17, is characterized in that described characteristic relation draws by the sample gas adsorbance of described gas absorption amount as detecting for a plurality of testing sample gas and the regression analysis between the concentration of described testing sample gas.
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| KR101303936B1 (en) * | 2011-11-28 | 2013-09-05 | 한국과학기술연구원 | Complexed structure having separation membrane used for sensing gas, gas-sensing apparatus comprising the same, method and apparatus for measuring gas concentration |
| KR101170450B1 (en) | 2011-12-09 | 2012-08-07 | 주식회사 과학기술분석센타 | Pollution measurement apparatus for changing sensor easily |
| KR101432107B1 (en) * | 2013-01-18 | 2014-08-22 | 목원대학교 산학협력단 | Device and Method pollution concentration measuring of gas |
| KR101303931B1 (en) * | 2013-07-23 | 2013-09-05 | 한국과학기술연구원 | Complexed structure having separation membrane used for sensing gas, gas-sensing apparatus comprising the same, method and apparatus for measuring gas concentration |
| CN103995089A (en) * | 2014-05-26 | 2014-08-20 | 江苏大学 | WSN (Wireless Sensor Network)-based piggery environment perception electronic nose and working method |
| CN104237471A (en) * | 2014-10-11 | 2014-12-24 | 北京网秦天下科技有限公司 | Gas detection method and device |
| KR101695651B1 (en) * | 2015-03-05 | 2017-01-12 | 대전대학교 산학협력단 | Apparatus and method for discriminating object by using a plurality of different semiconductor gas sensor |
| KR101674048B1 (en) | 2015-05-22 | 2016-11-08 | 국민대학교산학협력단 | Gas sensor platform for real-time detection of various toxic chemicals and emergency alert system using thereof |
| US10520490B2 (en) | 2015-08-06 | 2019-12-31 | Htc Corporation | Gas detecting device and gas detecting method using the same |
| CN106442640A (en) * | 2015-08-06 | 2017-02-22 | 宏达国际电子股份有限公司 | Gas detection apparatus and gas detection method using gas detection apparatus |
| JP6731710B2 (en) * | 2015-08-31 | 2020-07-29 | 新コスモス電機株式会社 | Gas analysis system and gas analysis method |
| CN110709885B (en) * | 2017-06-19 | 2023-11-21 | 株式会社而摩比特 | Data structure and composite data generating device |
| US11754541B2 (en) | 2017-09-25 | 2023-09-12 | Cymer, Llc | Fluorine detection in a gas discharge light source |
| CN108267487B (en) * | 2017-12-08 | 2020-04-07 | 西安电子科技大学 | Detection device and method for hydrogen sulfide |
| KR20200077639A (en) * | 2018-12-20 | 2020-07-01 | (주)센텍코리아 | Apparatus for measuring gas concentration and Method for measuring gas concentration using the same |
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| DE3468739D1 (en) * | 1983-03-29 | 1988-02-18 | New Cosmos Electric Co | Gas detecting apparatus |
| JP2919874B2 (en) * | 1989-11-07 | 1999-07-19 | フィガロ技研株式会社 | Ozone detector |
| JPH03162657A (en) * | 1989-11-20 | 1991-07-12 | Fuji Electric Co Ltd | Gas detector |
| JP2911928B2 (en) * | 1989-12-14 | 1999-06-28 | フィガロ技研株式会社 | Gas detection method |
| JP3874947B2 (en) * | 1997-12-01 | 2007-01-31 | 日本碍子株式会社 | Sulfur dioxide gas sensor |
| JP2000275202A (en) | 1999-03-25 | 2000-10-06 | Daikin Ind Ltd | Gas detecting device |
| JP3870261B2 (en) * | 2002-07-08 | 2007-01-17 | 独立行政法人産業技術総合研究所 | Resistance oxygen sensor, oxygen sensor device using the same, and air-fuel ratio control system |
| KR100831589B1 (en) * | 2007-02-02 | 2008-05-23 | 주식회사 과학기술분석센타 | Method for extracting property of gas sensor output, and device and method for measuring gas density using it |
| KR101022267B1 (en) * | 2008-03-27 | 2011-03-21 | 김동원 | System for monitoring odor |
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