CN108169310A - A kind of exhaust particulate analyte detection device and its detection method for improving stability - Google Patents
A kind of exhaust particulate analyte detection device and its detection method for improving stability Download PDFInfo
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- CN108169310A CN108169310A CN201711429399.5A CN201711429399A CN108169310A CN 108169310 A CN108169310 A CN 108169310A CN 201711429399 A CN201711429399 A CN 201711429399A CN 108169310 A CN108169310 A CN 108169310A
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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
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/4077—Means for protecting the electrolyte or the electrodes
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- G—PHYSICS
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- 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
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/409—Oxygen concentration cells
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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
- G01N27/403—Cells and electrode assemblies
- G01N27/406—Cells and probes with solid electrolytes
- G01N27/407—Cells and probes with solid electrolytes for investigating or analysing gases
- G01N27/41—Oxygen pumping cells
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Abstract
The present invention relates to a kind of exhaust particulate analyte detection devices for improving stability, are made of multilayer rectangle substrate, zirconium oxide of the substrate material for the solid electrolyte YSZ doped yttriums of conduction oxonium ion；It is characterized in that：It is sequentially overlapped from top to bottom from the first substrate to the 8th substrate, the second substrate is provided with air chamber, oxygen pump dispatch from foreign news agency grade is set in air chamber, electric grade material is Pt；It is Pt that the interior setting oxygen pumping cell of reaction chamber, chamber, the quick battery of oxygen and the electric grade of detection, the material for detecting electricity grade are set on 4th substrate；Air reference chamber and reference electricity grade are set on the 6th substrate, and the material of reference electricity grade is Pt；The electric grade of setting heating between 7th substrate and the 8th substrate, the material for heating electric grade are Pt.Which overcome oxygen concentration in the offgas it is low in the case of, particulate matter sensors cause since oxygen ion concentration is low solid electrolyte power generation solution, sensor failure and burn it is insufficient the problem of, it is ensured that the abundant burning of particulate matter extends the service life of sensor.
Description
Technical field
The present invention relates to a kind of exhaust particulate analyte detection devices and its detection method for improving stability, belong to motor vehicles
Emission detections field.
Background technology
With sharply increasing for vehicle guaranteeding organic quantity, atmosphere pollution form also becomes increasingly serious, the serious shadow of haze weather
People’s lives and health are rung.Some researches show that, Vehicle Exhaust Particulate is one of the main reason for leading to gray haze phenomenon.It surveys
Amount the granular material discharged of vehicle exhaust seems particularly significant.
The measuring method of existing particulate matter sensors is to apply high pressure between the work electricity grade of two intersections, and particulate matter sinks
Product is gathered in the surface for intersecting electric grade, forms electric bridge, and the resistance for the electric grade that works changes because particulate matter deposits, and passes through inspection
Electric current and the resistance according to detection Current calculation are surveyed, the concentration of particulate matter in tail gas can be detected.When particulate matter deposits to one
After determining degree, the particulate matter of aggregation is removed using burning, using the method for burning particles object, possibly can not fully be removed
The carbon of the combined electric grade to sensor, patent 201180007319.1 provide a kind of abundant removal and are attached to carbon in electric grade
Method increases an oxygen pump electricity grade on sensor label, the oxonium ion in exhaust gas is pumped into work electricity grade surface, has been up to
The oxonium ion on the electric grade surface of work reacts rapidly with the carbon being already integrated in work electricity grade.
When particle concentration is higher, and the oxygen concentration in exhaust gas is relatively low, oxygen pump electricity grade is pumped into work electricity grade
Oxonium ion is still limited, and when the concentration of oxygen is too low, and solid electrolyte is easily electrolysed.So exhaust oxygen concentration compared with
In the case of low, use that this oxygen in exhaust gas is pumped into work electricity grade in the method for the complete particulate matter that burns is undesirably
's.
Invention content
The purpose of the present invention is to provide it is a kind of improve stability exhaust particulate analyte detection device and its detection method,
It overcomes in the case that oxygen concentration is low in the offgas, particulate matter sensors cause solid electrolyte to be sent out since oxygen ion concentration is low
The problem of electrolysis, sensor failure and insufficient burning, it is ensured that the abundant burning of particulate matter, extend sensor uses the longevity
Life.
The technical proposal of the invention is realized in this way：A kind of exhaust particulate analyte detection device for improving stability, by more
Layer rectangle substrate is formed, zirconium oxide of the substrate material for the solid electrolyte YSZ doped yttriums of conduction oxonium ion；Its feature exists
In：It is sequentially overlapped from top to bottom from the first substrate to the 8th substrate, the second substrate is provided with air chamber, is set in air chamber
Oxygen pump dispatch from foreign news agency grade, electric grade material is Pt；The interior setting oxygen pumping cell of reaction chamber, chamber, the quick battery of oxygen are set on the 4th substrate
With the electric grade of detection, the material for detecting electric grade is Pt；Air reference chamber and reference electricity grade are set on the 6th substrate, reference electricity grade
Material is Pt；The electric grade of setting heating between 7th substrate and the 8th substrate, the material for heating electric grade are Pt.
The oxygen pumping cell is by being separately positioned on the oxygen pump dispatch from foreign news agency grade of third substrate upper and lower surface and oxygen pump inner electrode group
Into a two electric grade materials are Pt.
The quick battery of oxygen is by the quick electric grade of the oxygen for being arranged on third substrate lower surface and is arranged on the 5th substrate lower surface
Reference electricity grade forms, and the quick battery material of oxygen is Pt.
The electric grade of the detection is made of two that are arranged on the 5th substrate upper surface cross one another Pt electricity grades.
The electric grade of the detection is located at oxygen pump inner electrode and the underface centre position of the quick electric grade of oxygen.
The air chamber and contact air, oxygen concentration is atmospheric oxygen concentration in chamber.
A kind of exhaust particulate analyte detection step for improving stability is as follows：Apply heating voltage at the electric grade both ends of heating, open
The dynamic electric grade of heating, 400 DEG C or so are heated to by sensor, and the particulate matter in tail gas enters reaction chamber with exhaust gas flow, and
Deposition is gathered in the electric grade of detection, the high pressure E2 that electric grade both ends apply 200V is detected, since particulate matter forms electricity between electric grade
Bridge leads to detect electric grade resistance changing, when the quantity of the particulate matter of aggregation increases over benchmark quantity, it is described plus
The heating temperature of thermoelectricity grade control sensor is raised to 700 DEG C or more.At the same time, when the electric grade of detection detect had accumulated it is more
When the particulate matter of benchmark quantity, apply pump oxygen voltage E1 between oxygen pump inner electrode and oxygen pump dispatch from foreign news agency grade, it will be in air chamber
Oxygen be pumped into reaction chamber.Since air chamber is connected with air, oxygen content is higher in air chamber, ensures have
Enough source of oxygen are pumped into reaction chamber.Particulate matter is removed after reacting in the electric grade of detection with oxygen, the quick battery of oxygen
Remaining oxygen concentration after reacting is measured, the oxygen concentration of measurement is preset to a constant numerical value, when the oxygen concentration of measurement reaches
During less than preset value, increase the pump oxygen voltage E1 on oxygen pumping cell, until the quick battery measurement remaining oxygen concentration of oxygen reaches default
Value.By particulate matter, the reaction was complete enough for the oxygen concentration of guarantee participation reaction successively.
Good effect of the present invention can be efficiently solved when particle concentration is higher, and the oxygen concentration in exhaust gas is relatively low
When, be pumped into the method for oxonium ion using oxygen pump electricity grade, solid electrolyte is electrolysed, sensor life-time reduce the problem of.Have
The complete reaction that ensure that particulate matter of effect stabilizes the offset output of sensor.
Description of the drawings
Fig. 1 is the section view of particulate matter detection means first embodiment according to the present invention.
Fig. 2 is the decomposition chart for explaining particulate matter detection means first embodiment according to the present invention.
Fig. 3 is the section view of particulate matter detection means second embodiment according to the present invention；
Relationship between the usage time and sensor zero point of the particulate matter sensors of Fig. 4 exemplary embodiments according to the present invention
Figure.
In Fig. 1：The first substrates of 1-；The second substrates of 2-；The second substrates of 3-；The second substrates of 4-；5-the second substrates；6-
Two substrates；The second substrates of 7-；The second substrates of 8-；20- oxygen pumping cells；20b- oxygen pump dispatch from foreign news agency grades；20a- oxygen pump inner electrodes；21- oxygen
Quick battery；The quick electric grade of 21a- oxygen；21b- reference electricity grades；The electric grade of 22- detections；The electric grade of 23- heating；30- reaction chambers；31- air
Chamber；32- air reference chambers.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples：
Embodiment 1
As shown in Figure 1, a kind of exhaust particulate analyte detection device for improving stability, is made of, base sheet multilayer rectangle substrate
Expect the solid electrolyte YSZ for conduction oxonium ion（The zirconium oxide of doped yttrium）.From the first substrate 1 to the 8th substrate 8 from top to bottom
It is sequentially overlapped.The second substrate 2 setting air chamber 31, the interior setting oxygen pump dispatch from foreign news agency grade 20b of air chamber 31, oxygen pump dispatch from foreign news agency
Grade 20b materials are Pt.The air chamber 31 and contact air, oxygen concentration is atmospheric oxygen concentration in chamber.The
The interior setting oxygen pumping cell 20 of reaction chamber 30, chamber, the quick battery 21 of oxygen and the electric grade 22 of detection are set on four substrates 4.Oxygen pumping cell
The 20 oxygen pump dispatch from foreign news agency grade 20b and oxygen pump inner electrode by being separately positioned on 1 upper and lower surface of third substrate forms 20a, oxygen pump inner electrode
20a materials are Pt.The quick battery 21 of oxygen is by the quick electricity grade 21a of the oxygen for being arranged on 3 lower surface of third substrate and is arranged under the 5th substrate 5
The reference electricity grade 21b compositions on surface.The quick electricity grade 21a of oxygen and reference electricity grade 21b materials are Pt.The electric grade 22 of detection is by being arranged on the
Two cross one another Pt electricity grade compositions of five substrates, 5 upper surface.The electric grade 22 of detection is located at oxygen pump inner electrode 20a and the quick electric grade of oxygen
The underface centre position of 21a.Air reference chamber 32 and reference electricity grade 21b are set on the 6th substrate 6.7th substrate 7 and
The electric grade 23 of setting heating between eight substrates 8.The electric grade 23 of heating has two kinds of functions of heating and thermometric, applies electricity according to additional power source
Pressure realizes heating.Fig. 2 is the decomposition chart for explaining particulate matter detection means first embodiment according to the present invention；
A kind of exhaust particulate analyte detection device for improving stability, particle concentration in tail gas is detected by following steps：It opens
The dynamic electric grade 23 of heating, is heated to 400 DEG C or so, the particulate matter in tail gas enters reaction chamber with exhaust gas flow by sensor
30, deposition is gathered in the electric grade 22 of detection, detects the high pressure E that electric 22 both ends of grade apply 200V2, since particulate matter is between electric grade
Electric bridge is formed, leads to detect electric 22 resistance of grade changing, when the quantity of the particulate matter of aggregation increases over benchmark quantity,
The electric grade 23 of the heating controls the heating temperature of sensor to be raised to 700 DEG C or more.At the same time, when the electric grade 22 of detection detects
When having had accumulated the particulate matter more than benchmark quantity, apply pump oxygen electricity between oxygen pump inner electrode 20a and oxygen pump dispatch from foreign news agency grade 20b
Press E1, the oxygen in air chamber 31 is pumped into reaction chamber 30.Since air chamber 31 is connected with air, air chamber
Oxygen content is higher in 31, ensures that there is enough source of oxygen to be pumped into reaction chamber 30.Particulate matter in the electric grade 22 of detection with
Oxygen is removed after reacting, and the quick battery 21 of oxygen measures remaining oxygen concentration after reaction, and the oxygen concentration of measurement is preset to
One constant numerical value when preset value is not achieved in the oxygen concentration of measurement, increases the pump oxygen voltage E on oxygen pumping cell 201,Until
The quick battery 21 of oxygen measures remaining oxygen concentration and reaches preset value.Ensure that the oxygen concentration for participating in reaction is anti-by particulate matter enough successively
It should be complete.Fig. 4 is between usage time and sensor zero point according to the particulate matter sensors of exemplary embodiment of the present invention
Relationship, test condition is that particle concentration is 10mg/m3, as seen from the figure, with the extension of sensor usage time, sensor
Baseline vary less, sensor stability is preferable.
Embodiment 2
Fig. 3 is the section view of particulate matter detection means second embodiment according to the present invention；A kind of tail gas for improving stability
Particulate matter detection means are made of multilayer rectangle substrate, and substrate material is the solid electrolyte YSZ of conduction oxonium ion（Yttrium is mixed
Miscellaneous zirconium oxide）.It is sequentially overlapped from top to bottom from the first substrate 1 to the 8th substrate 8.The second substrate 2 setting air chamber
Room 31, the interior setting oxygen pump dispatch from foreign news agency grade 20b of air chamber 31, oxygen pump dispatch from foreign news agency grade 20b materials are Pt.The air chamber 31 and sky
Gas phase connects, and oxygen concentration is atmospheric oxygen concentration in chamber.Set reaction chamber 30, chamber are interior to set on 4th substrate 4
The quick battery 21 of oxygen pumping cell 20, oxygen and the electric grade 22 of detection.Oxygen pumping cell 20 is by being separately positioned on 5 upper surface of the 5th substrate detection electricity
An electric grade and oxygen pump dispatch from foreign news agency grade 20b compositions in grade 22, i.e. oxygen pumping cell 20 share an electric grade with the electric grade of detection.The quick electricity of oxygen
Pond 21 is by the quick electricity grade 21a of the oxygen for being arranged on 3 lower surface of third substrate and the reference electricity grade 21b for being arranged on 5 lower surface of the 5th substrate
Composition.The quick electricity grade 21a of oxygen and reference electricity grade 21b materials are Pt.The electric grade 22 of detection is by being arranged on the two of 5 upper surface of the 5th substrate
A cross one another Pt electricity grade composition.The electric grade 22 of detection is located at the underface interposition of oxygen pump inner electrode 20a and the quick electric grade 21a of oxygen
It puts.Air reference chamber 32 and reference electricity grade 21b are set on the 6th substrate 6.Setting adds between 7th substrate 7 and the 8th substrate 8
Thermoelectricity grade 23.The electric grade 23 of heating has two kinds of functions of heating and thermometric, and applying voltage according to additional power source realizes heating.
Claims (7)
1. a kind of exhaust particulate analyte detection device for improving stability, is made of multilayer rectangle substrate, substrate material is conduction
The zirconium oxide of the solid electrolyte YSZ doped yttriums of oxonium ion；It is characterized in that：From the first substrate to the 8th substrate from top to bottom according to
Secondary superposition, the second substrate are provided with air chamber, oxygen pump dispatch from foreign news agency grade are set in air chamber, electric grade material is Pt；4th base
Setting oxygen pumping cell, the quick battery of oxygen and the electric grade of detection, the material for detecting electric grade are Pt on piece setting reaction chamber, chamber；The
Air reference chamber and reference electricity grade are set on six substrates, and the material of reference electricity grade is Pt；Between 7th substrate and the 8th substrate
The electric grade of setting heating, the material for heating electric grade are Pt.
2. according to a kind of exhaust particulate analyte detection device of raising stability described in claim 1, it is characterised in that described
Oxygen pumping cell be made of the oxygen pump dispatch from foreign news agency grade and oxygen pump inner electrode for being separately positioned on third substrate upper and lower surface, two electric grade materials
It is Pt.
3. according to a kind of exhaust particulate analyte detection device of raising stability described in claim 1, it is characterised in that described
The quick battery of oxygen is made of the quick electric grade of the oxygen for being arranged on third substrate lower surface with the reference electricity grade for being arranged on the 5th substrate lower surface,
The quick battery material of oxygen is Pt.
4. according to a kind of exhaust particulate analyte detection device of raising stability described in claim 1, it is characterised in that described
The electric grade of detection be made of two that are arranged on the 5th substrate upper surface cross one another Pt electricity grades.
5. according to a kind of exhaust particulate analyte detection device of raising stability described in claim 1, it is characterised in that described
The electric grade of detection be located at oxygen pump inner electrode and the underface centre position of the quick electricity grade of oxygen.
6. according to a kind of exhaust particulate analyte detection device of raising stability described in claim 1, it is characterised in that described
Air chamber and contact air, oxygen concentration is atmospheric oxygen concentration in chamber.
7. a kind of exhaust particulate analyte detection step for improving stability is as follows：Apply heating voltage at the electric grade both ends of heating, start
The electric grade of heating, is heated to 400 DEG C or so, the particulate matter in tail gas enters reaction chamber with exhaust gas flow, and sinks by sensor
Product is gathered in the electric grade of detection, detects the high pressure E2 that electric grade both ends apply 200V, since particulate matter forms electric bridge between electric grade,
Cause to detect electric grade resistance and change, when the quantity of the particulate matter of aggregation increases over benchmark quantity, the heating
The heating temperature of electric grade control sensor is raised to 700 DEG C or more；At the same time, it is more than when the electric grade of detection detects to have had accumulated
During the particulate matter of benchmark quantity, application pump oxygen voltage E1, indoor by air chamber between oxygen pump inner electrode and oxygen pump dispatch from foreign news agency grade
Oxygen is pumped into reaction chamber；Since air chamber is connected with air, oxygen content is higher in air chamber, ensures there is foot
Enough source of oxygen are pumped into reaction chamber；Particulate matter is removed after reacting in the electric grade of detection with oxygen, and the quick battery of oxygen is surveyed
Remaining oxygen concentration after quantitative response, the oxygen concentration of measurement are preset to a constant numerical value, when the oxygen concentration of measurement is not up to
During to preset value, increase the pump oxygen voltage E1 on oxygen pumping cell, until the quick battery measurement remaining oxygen concentration of oxygen reaches preset value；
By particulate matter, the reaction was complete enough for the oxygen concentration of guarantee participation reaction successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711429399.5A CN108169310B (en) | 2017-12-26 | 2017-12-26 | Tail gas particulate matter detection device capable of improving stability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711429399.5A CN108169310B (en) | 2017-12-26 | 2017-12-26 | Tail gas particulate matter detection device capable of improving stability |
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| Publication Number | Publication Date |
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| CN108169310A true CN108169310A (en) | 2018-06-15 |
| CN108169310B CN108169310B (en) | 2020-08-25 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121177A (en) * | 1994-06-09 | 1996-04-24 | 日本电装株式会社 | Oxygen concentration detector |
| US20020108856A1 (en) * | 2000-11-27 | 2002-08-15 | Akira Kunimoto | Gas sensing and oxygen pumping device, and apparatus using the same |
| CN1493876A (en) * | 2002-11-01 | 2004-05-05 | �ձ�������ҵ��ʽ���� | Gas sensor having laminate comprising solid electrolyte layer and alumina substrate |
| US6773565B2 (en) * | 2000-06-22 | 2004-08-10 | Kabushiki Kaisha Riken | NOx sensor |
| US20110083490A1 (en) * | 2009-10-13 | 2011-04-14 | Ngk Insulators, Ltd. | Gas sensor |
| CN103376286A (en) * | 2012-04-26 | 2013-10-30 | 金坛鸿鑫电子科技有限公司 | Tail gas detection sensor and methods for detecting concentration of nitrogen oxides and concentration of particulate matters in tail gas |
| CN103380363A (en) * | 2010-01-29 | 2013-10-30 | 丰田自动车株式会社 | Particulate matter detecting sensor and particulate matter detecting apparatus |
| CN105388195A (en) * | 2014-09-01 | 2016-03-09 | 丰田自动车株式会社 | gas concentration detecting device |
-
2017
- 2017-12-26 CN CN201711429399.5A patent/CN108169310B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1121177A (en) * | 1994-06-09 | 1996-04-24 | 日本电装株式会社 | Oxygen concentration detector |
| US6773565B2 (en) * | 2000-06-22 | 2004-08-10 | Kabushiki Kaisha Riken | NOx sensor |
| US20020108856A1 (en) * | 2000-11-27 | 2002-08-15 | Akira Kunimoto | Gas sensing and oxygen pumping device, and apparatus using the same |
| CN1493876A (en) * | 2002-11-01 | 2004-05-05 | �ձ�������ҵ��ʽ���� | Gas sensor having laminate comprising solid electrolyte layer and alumina substrate |
| US20110083490A1 (en) * | 2009-10-13 | 2011-04-14 | Ngk Insulators, Ltd. | Gas sensor |
| CN103380363A (en) * | 2010-01-29 | 2013-10-30 | 丰田自动车株式会社 | Particulate matter detecting sensor and particulate matter detecting apparatus |
| CN103376286A (en) * | 2012-04-26 | 2013-10-30 | 金坛鸿鑫电子科技有限公司 | Tail gas detection sensor and methods for detecting concentration of nitrogen oxides and concentration of particulate matters in tail gas |
| CN105388195A (en) * | 2014-09-01 | 2016-03-09 | 丰田自动车株式会社 | gas concentration detecting device |
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