CN202928983U - Nitrogen-oxygen sensor - Google Patents
Nitrogen-oxygen sensor Download PDFInfo
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- CN202928983U CN202928983U CN 201220527517 CN201220527517U CN202928983U CN 202928983 U CN202928983 U CN 202928983U CN 201220527517 CN201220527517 CN 201220527517 CN 201220527517 U CN201220527517 U CN 201220527517U CN 202928983 U CN202928983 U CN 202928983U
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Abstract
The utility model relates to the technical field of oxygen sensors, and in particular relates to a nitrogen-oxygen sensor. The nitrogen-oxygen sensor comprises a U-shaped sensing body and a bar-shaped heater, wherein the U-shaped sensing body is provided with a step; the bar-shaped heater is independently arranged in the nitrogen-oxygen sensor; the sensing body part mainly comprises a U-shaped zirconia pipe and an external zirconia thin layer, wherein the U-shaped zirconia pipe is internally provided with the step; a first measuring chamber, a second measuring chamber and a reference air chamber are formed between two layers of zirconia pipe bodies; the first measuring chamber is communicated with outside measuring atmosphere through a first diffusion barrier layer; the second measuring chamber is communicated with the atmosphere in the first measuring chamber through a second diffusion barrier layer; and the reference air chamber is completely isolated from the outside so as to form an independent chamber body in which a reference air electrode is arranged. By adopting the nitrogen-oxygen sensor provided by the utility model, the air fuel ratio and content of nitric oxides in the tail gas can be detected at the same time; and the nitrogen-oxygen sensor is simple in structure, uniform in temperature distribution at a working state, high in measuring precision, excellent in stability, high in thermal shock resisting performance and long in service life.
Description
Technical field
The utility model relates to the lambda sensor technical field, and especially a kind of nitrogen oxide sensor is applicable to the measurement of vehicle exhaust, metallurgy industry oxides of nitrogen gas etc.
Background technology
Along with the continuous increase of automobile pollution, (HC, CO, NOx and PM etc.) are more and more serious to the pollution of atmosphere for the motor vehicle exhaust emission thing.Wherein the discharging of oxides of nitrogen (NOx) is particularly serious, and the photo-chemical smog that it causes and acid rain have caused huge harm to the mankind.It even can damage the ozone layer, cause greenhouse effect.The discharging of oxides of nitrogen has at present caused global common concern, and has formulated more and more stricter automobile exhaust emission standard.And the realization in Europe 5 and Europe 6 need to be carried out the real-time online detection to the discharging of oxides of nitrogen, and nitrogen oxide sensor is exactly one of core component of this on-line detecting system.
The nitrogen oxide sensor of having reported at present is all slice structure, this structure is generally to obtain zirconium oxide substrate by the flow casting molding technology, become required shape with perforation processing by cutting, be total to burning technology by serigraphy and lamination again zirconia matrix and heater circuit, metal platinum electrode, porous diffusion barrier layer and alumina insulating layer is integrated, thereby form first and measure chamber, the second measurement chamber and reference air duct, and comprise well heater, diffusion barrier layer.Measure by first internal and external electrode that zirconium oxide substrate both sides, upper strata, chamber arrange and form the first pump oxygen unit, measure by second internal and external electrode that lower floor's zirconium oxide substrate both sides, chamber arrange and form the second pump oxygen unit, measure by first detecting electrode and the reference air electrode that lower floor's zirconium oxide substrate both sides, chamber arrange and form concentration detecting unit.Reference air electrode and the second pump oxygen unit external electrode all are arranged in the reference air duct, fully contact with extraneous fresh air.Integrated well heater in the middle of the bottom two layers zirconium oxide substrate, and by alumina insulating layer with heating circuit with zirconium oxide substrate insulation come.
First measures the chamber communicates with extraneous detected gas through the first diffusion barrier layer, and second measures the chamber communicates with the first atmosphere of measuring in the chamber through the second diffusion barrier layer.When work, apply pump voltage by the external closed-loop controller at the first pump oxygen unit internal and external electrode end and produce certain pump electric current (claiming afterwards the first pump electric current), make the first oxygen atmosphere of measuring in the chamber be drawn out of, and through the measurement of concentration detecting unit, with first measure oxygen concentration in the chamber control to one constant low-level.Meanwhile, applying a constant pump voltage at the second pump oxygen unit internal and external electrode end extracts the second oxygen atmosphere of measuring in the chamber out, form the second pump oxygen modular pump electric current (claiming afterwards the second pump electric current), just can obtain nitrous oxides concentration in detected gas by this pump electric current.
This nitrogen oxide sensor need to maintain the temperature of sensing and measuring point during work about 850 ° of C in order to obtain higher measuring accuracy always; Meanwhile start-up time, its integrated heater circuit must have sufficiently high heating power to satisfy the requirement of maximum discharge rules faster in order to obtain.Like this, asymmetric and irregular self heat resistanceheat resistant hydraulic performance decline that shakes that causes due to slice structure itself can cause its stability and decline in serviceable life.
In addition, this chip nitrogen oxide sensor need to form more than 6 layers in the zirconium oxide substrate set, and its well heater can only be arranged on the bottom, so the thermograde between the multilayer zirconia is very large, causes temperature control difficulty to increase and has affected measuring accuracy and structural stability.And the complexity of its manufacturing process significantly improves, the more difficult control of production efficiency and yield rate.
The utility model content
In order to overcome the deficiency of existing chip nitrogen oxide sensor, the utility model provides a kind of nitrogen oxide sensor.
the technical scheme that its technical matters that solves the utility model adopts is: a kind of nitrogen oxide sensor, it comprises inner U-shaped tubular zirconium-oxide with step, external oxidation zirconium thin layer and heating rod, be provided with first between the U-shaped tubular zirconium-oxide in described inside and external oxidation zirconium thin layer and measure the chamber, second measures chamber and reference air chamber, described first measures the chamber communicates with the extraneous atmosphere of measuring through the first diffusion barrier layer, second measures the chamber communicates with the first atmosphere of measuring in the chamber through the second diffusion barrier layer, described reference air chamber is closed and extraneous gas isolating by separation layer, in establish the reference air electrode.The described first outer oxide zirconium both sides of measuring the chamber arrange the pump oxygen electrode, formed the first pump oxygen unit, the described second U-shaped tubular zirconium-oxide both sides, inside of measuring the chamber arrange the pump oxygen electrode, form the second pump oxygen unit, formation oxygen concentration testing unit between the described first reference air electrode of measuring in chamber internal electrode and reference air chamber.Between the U-shaped tubular zirconium-oxide in described inside and external oxidation zirconium thin layer, direct contact portion is kept apart by the alumina insulation thin layer, and is noiseless to guarantee two pump oxygen cell signal.Formed the reference air duct between described U-shaped tubular zirconium-oxide and heating rod, stablized to guarantee the second atmosphere of measuring chamber the second pump oxygen unit positive electrode contact.
According to another one embodiment of the present utility model, it is inner that the reference air electrode also can be arranged on U-shaped tubular zirconium-oxide neatly, so just need not to arrange the reference air chamber.
Nitrogen oxide sensor of the present utility model, 3 electrode contacts are set with the signal connection of 4 electrodes of convenient U-shaped tubular zirconium-oxide lateral electrode on the step of U-shaped tubular zirconium-oxide, specific as follows: owing to insulating between the U-shaped tubular zirconium-oxide in inside and external oxidation zirconium thin layer, the negative electrode of the negative electrode of its first pump oxygen unit and the second pump oxygen unit can be connected on the first electrode contacts by conllinear, the first pump oxygen unit positive electrode is connected with the second electrode contacts, and the reference air electrode is connected on the third electrode contact.Only there is second a pump oxygen unit positive electrode U-shaped tubular zirconium-oxide inboard, can single contact be set by opening end and be connected with signal wire.4 electrode contacts are connected with 4 signal wires respectively, add the well heater control loop and need 2 lead-in wires, have just formed the tubular type nitrogen oxide sensor with 6 wires.
According to another one embodiment of the present utility model, 3 electrode contacts are set with the signal connection of 3 electrodes of convenient U-shaped tubular zirconium-oxide lateral electrode on the step of U-shaped tubular zirconium-oxide, specific as follows: the negative electrode of the first pump oxygen unit is connected on the first electrode contacts, the negative electrode of the second pump oxygen unit is connected on the second electrode contacts, and the first pump oxygen unit positive electrode is connected with the third electrode contact.Due to the negative electrode of the first pump oxygen unit be connected the negative electrode of pump oxygen unit and connect without conllinear, need not to take insulation measures, directly combination between inner U-shaped tubular zirconium-oxide and external oxidation zirconium thin layer.There is the second pump oxygen unit positive electrode and reference air electrode U-shaped tubular zirconium-oxide inboard, can be connected with signal wire by divide 2 electrode contacts that are arranged at opening end.5 electrode contacts are connected with 5 signal wires respectively, add the well heater control loop and need 2 lead-in wires, have just formed the tubular type nitrogen oxide sensor with 7 wires.
The sensor construction that the utility model is listed and method for making are not limited to make nitrogen oxide sensor, also can be used for making the tubular type senser elements take zirconia as main material such as tubular type current oxygen sensors, tube-type double-battery wide oxygen sensor.
The beneficial effects of the utility model are, and are simple in structure with the nitrogen oxide sensor that the utility model is prepared, technology difficulty is little; And respond to main body only by two-layer tubular type zirconia functional layer member, and built-in heating rod, make whole induction body temperature even, effectively improved measuring accuracy; The tubular structure heat resistanceheat resistant that significantly the improved finished product performance of shaking in addition can extend serviceable life of product, improves the stability in use of product.
Description of drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of another embodiment of the utility model;
Figure 1A is induction main body enlarged diagram in Fig. 1;
Fig. 2 A is induction main body enlarged diagram in Fig. 2;
Figure 1B is that in Fig. 1, U-shaped tubular zirconium-oxide lateral electrode contact arranges schematic diagram;
Fig. 2 B is that in Fig. 2, U-shaped tubular zirconium-oxide lateral electrode contact arranges schematic diagram;
Fig. 1 C is that in Fig. 1, U-shaped tubular zirconium-oxide medial electrode contact arranges schematic diagram;
Fig. 2 C is that in Fig. 2, U-shaped tubular zirconium-oxide medial electrode contact arranges schematic diagram.
1. inner U-shaped tubular zirconium-oxides in figure, 2. external oxidation zirconium thin layer, 3. heating rod, 4. first measure the chamber, 5 second measure the chamber, 6 reference air chambers, 7 first diffusion barrier layers, 8 second diffusion barrier layers, 9 separation layers, 10 first pump oxygen unit negative electrodes, 11 first pump oxygen unit positive electrodes, 12 second pump oxygen unit negative electrodes, 13 second pump oxygen unit positive electrodes, 14 reference air electrodes, 15 alumina insulating layers, 16 reference air ducts, 17 outside the first electrode contacts, 18 outside the second electrode contacts, 19 third electrode contact, the outsides, 20 medial electrode contacts, 21 inboard the second electrode contacts.
Embodiment
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing and enforcement clever, the utility model is further described.Should be appreciated that embodiment described herein only is used for explaining the utility model, and be not used in restriction the utility model.
As shown in Figure 1A, a kind of nitrogen oxide sensor, it comprises inner U-shaped tubular zirconium-oxide 1, external oxidation zirconium thin layer 2 and aluminium oxide ceramics heating rod 3 with step, inner U-shaped tubular zirconium-oxide 1 and external oxidation zirconium thin layer 2 are as solid electrolyte, its material is doping 4 ~ 6mol yttria-stabilized zirconia (YSZ), is provided with first between two-layer and measures chamber 4, second and measure chamber 5 and reference air chamber 6.First measures chamber 4 communicates with the extraneous atmosphere of measuring through the first diffusion barrier layer 7, second measures chamber 5 communicates with the first atmosphere of measuring in chamber 4 through the second diffusion barrier layer 8, reference air chamber 6 is closed and extraneous gas isolating by separation layer 9, in establish reference air electrode 14; Diffusion barrier layer is the porous oxidation aluminum, and separation layer is the compact aluminum oxide material.The first outer oxide zirconium both sides of measuring chamber 4 arrange the pump oxygen electrode, i.e. the first pump oxygen unit negative electrode 10 and the first pump oxygen unit positive electrode 11, formed the first pump oxygen unit, the second internal layer zirconia both sides of measuring chamber 5 arrange the pump oxygen electrode, i.e. the second pump oxygen unit negative electrode 12 and the second pump oxygen unit positive electrode 13, form the second pump oxygen unit, formation oxygen concentration testing unit between the first electrode 10 and reference air electrode 14 of measuring in chamber 4.Between inner U-shaped tubular zirconium-oxide 1 and external oxidation zirconium thin layer 2, direct contact portion is kept apart by alumina insulation thin layer 15, and is noiseless to guarantee two pump oxygen cell signal.Formed reference air duct 16 between U-shaped tubular zirconium-oxide 1 and heating rod 3, stable with the atmosphere of guaranteeing the second pump oxygen unit external electrode 13 contacts.
The first pump oxygen unit negative electrode 10 materials are comprised of noble metal platinum and gold.
The second pump oxygen unit negative electrode 12 materials are comprised of noble metal platinum and rhodium.
Pump oxygen unit positive electrode 11,13 and reference air electrode 14 materials are noble metal platinum.
As shown in Figure 1B, 3 electrode contacts are set with the signal connection of 4 electrodes of convenient U-shaped tubular zirconium-oxide lateral electrode on the step of U-shaped tubular zirconium-oxide.Due to insulation between the U-shaped tubular zirconium-oxide 1 in inside and external oxidation zirconium thin layer 2, its first pump oxygen unit negative electrode 10 and the second pump oxygen unit negative electrode 12 can be connected on the first electrode contacts 17 by conllinear; The first pump oxygen unit positive electrode 11 is connected with third electrode contact 19, and reference air electrode 14 is connected on the second electrode contacts 18.Only there is second a pump oxygen unit positive electrode 13 U-shaped tubular zirconium-oxide inboard 1, can unitary electrode contact 20 be set by opening end and be connected with signal wire, as shown in Fig. 1 C.Electrode contacts 17,18,19,20 is connected with 4 signal wires respectively, adds the well heater control loop and needs 2 lead-in wires, has just formed the tubular type nitrogen oxide sensor with 6 wires.
This nitrogen oxide sensor is when work, and the measurement gas that contains oxides of nitrogen (NOx) is diffused into first by the first diffusion barrier layer 7 and measures in chamber 4.Apply pump voltage with the first oxygen extraction of measuring in chamber 4 by the external closed-loop controller between the first pump oxygen unit positive electrode 11 and the first pump oxygen unit negative electrode 10, and utilize the oxygen concentration testing unit inspection first that forms between electrode 10 and reference air electrode 14 to measure the interior oxygen concentration Vs in chamber 4, adjust pump voltage and make it maintain very low level, and formed the first pump electric current I p1.Because the limiting current characteristic of the first diffusion barrier layer by the first pump electric current I p1, just can obtain the oxygen content in measurement gas, is also the air-fuel ratio value.
Because the first electrode 10 materials of measuring in chamber 4 are platinum and gold, its catalytic activity is very low, although its inner oxygen concentration is very low, can guarantee that also oxides of nitrogen can not be decomposed.Meanwhile, first measures in the chamber 4 atmosphere can be diffused in the second measurement chamber 5 by the second diffusion barrier layer 8, because the second electrode 12 of measuring in chamber 5 is that the very high rhodium of catalytic activity and platinum form, can be rapidly with decompose nitrogen oxides, discharge oxygen, at this moment applying constant pump voltage between the second pump oxygen cell electrode 13 and 12 by the external closed-loop controller extracts the second oxygen of measuring in chamber 5 out, form the second pump electric current I p2, according to this pump electric current, just can obtain the nitrous oxides concentration in measurement gas.
Concrete method for making is as follows:
The Zirconium oxide powder of 4 ~ 6mol yttria of adulterating adds 5% ~ 25% cementing agent and is prepared into idiosome material or slurry, is prepared into U-shaped tubular zirconium-oxide with step, formin embryonic tube body after degreasing by compression-moulding methods or injection moulding method; Platinum electrode slurry accurately is coated in zirconia element embryonic tube body both sides to form the second pump oxygen unit, the second pump oxygen electrode lead-in wire and contact is all applied complete simultaneously.
Preparation porous oxidation aluminum slurry is coated in zirconia element embryonic tube body top with czochralski method, to form the first diffusion barrier layer; Again this slurry accurately is coated in two and measures middle position, chamber, to form the second diffusion barrier layer; Preparation compact aluminum oxide slurry is coated in zirconium pipe element embryo surface below reference air cavity with czochralski method so that and the zirconia slurry insulation that applies of postorder come; Again this slurry accurately is coated in second and measures in the middle of chamber and reference air chamber, to form separation layer, that reference air cavity is isolated.Dag, PVB, terpinol and softening agent are mixed fully, prepare the slurry that can volatilize fully after a kind of high temperature sintering, accurately be coated in first and measure on the position of chamber, the second measurement chamber and reference air cavity, in order to automatically form cavity after sintering.Accurately apply platinum electrode slurry in the first position of measuring chamber and reference air cavity again, in order to form the first pump oxygen unit negative electrode and reference air electrode, and two contact conductors and contact are all applied complete respectively.
After above-mentioned operation is completed and is dried, prepare the zirconia slurry of a kind of doping 4 ~ 6mol yttria, make its solid content consistent or approaching with the solid content of the inner U-shaped tubular zirconium-oxide somaplasm material of preparation.And the zirconia element embryo that will be coated with various function pulp layers is immersed in this slurry and evenly lifts, and obtains even thickness and complete totally enclosed external oxidation zirconium thin-walled coating.After external oxidation zirconium thin-walled coated and dried, platinum electrode slurry accurately is coated in first measures the cavity outer fix, forming the first pump oxygen unit positive electrode, and its contact conductor and contact coating are completed.
The plain idiosome that above operation obtains is put into high temperature furnace, burnt altogether 1 ~ 5 hour between 1350 ~ 1600 degree, can prepare the complete totally enclosed U-shaped zirconia body with various function cavitys and measuring unit in top.Its external oxidation zirconium thin layer mill is opened to certain position, opened the first diffusion barrier layer, just finally formed this utility model described with 6 lead-in wire tubular type nitrogen oxide sensor induction main bodys.
As another embodiment of the present utility model, its reference air electrode 14 also can be arranged on U-shaped tubular zirconium-oxide 1 inside neatly, so just need not to arrange the reference air chamber, as shown in Fig. 2 A.So remaining 3 electrodes only in U-shaped tubular zirconium-oxide 1 outside, arrange respectively 3 electrode contacts and couple together on the step with U-shaped tubular zirconium-oxide.Concrete as follows in Fig. 2 B: the negative electrode 10 of the first pump oxygen unit is connected on contact 17, and the negative electrode 12 of the second pump oxygen unit is connected on contact 18, and the first pump oxygen unit positive electrode 11 is connected with contact 19.Due to the negative electrode 10 of the first pump oxygen unit be connected the negative electrode 12 of pump oxygen unit and connect without conllinear, need not to take insulation measures, directly combination between inner U-shaped tubular zirconium-oxide 1 and external oxidation zirconium thin layer 2.There is the second pump oxygen unit positive electrode 13 and reference air electrode 14 U-shaped tubular zirconium-oxide 1 inboard, can be connected with signal wire by divide two contacts 20,21 that are arranged at opening end, as shown in Fig. 2 C.Electrode contacts 17,18,19,20,21 is connected with 5 signal wires respectively, adds the well heater control loop and needs 2 lead-in wires, has just formed the tubular type nitrogen oxide sensor with 7 wires.
This embodiment principle of work is identical with previous embodiment, but method for making adjusts to some extent, and is specific as follows:
The Zirconium oxide powder of 4 ~ 6mol yttria of adulterating adds 5% ~ 25% cementing agent and is prepared into idiosome material or slurry, is prepared into U-shaped tubular zirconium-oxide with step, formin embryonic tube body after degreasing by compression-moulding methods or injection moulding method; Platinum electrode slurry accurately is coated in zirconia element embryonic tube body first measures the both sides of measuring the position, chamber in chamber and second to form oxygen concentration testing unit and the second pump oxygen unit, simultaneously reference air electrode, first is measured in the chamber oxygen concentration testing cell electrode and the second pump oxygen electrode lead-in wire and contact and all applied and complete.
Preparation porous oxidation aluminum slurry is coated in zirconia element embryonic tube body top with czochralski method, to form the first diffusion barrier layer; Again this slurry accurately is coated in two and measures middle position, chamber, to form the second diffusion barrier layer.Dag, PVB, terpinol and softening agent are mixed fully, prepare the slurry that can volatilize fully after a kind of high temperature sintering, accurately be coated in first and measure on the position of chamber, the second measurement chamber and reference air cavity, in order to automatically form cavity after sintering.Accurately apply platinum electrode slurry in the first position of measuring the chamber again, in order to form the first pump oxygen unit negative electrode, and oxygen concentration testing cell electrode contact in this contact conductor and the first measurement chamber is linked together.
After above-mentioned operation is completed and is dried, prepare the zirconia slurry of a kind of doping 4 ~ 6mol yttria, make its solid content consistent or approaching with the solid content of the inner U-shaped tubular zirconium-oxide somaplasm material of preparation.And the zirconia element embryo that will be coated with various function pulp layers is immersed in this slurry and evenly lifts, and obtains even thickness and complete totally enclosed external oxidation zirconium thin-walled coating.After external oxidation zirconium thin-walled coated and dried, platinum electrode slurry accurately is coated in first measures the cavity outer fix, forming the first pump oxygen unit positive electrode, and its contact conductor and contact coating are completed.
The plain idiosome that above operation obtains is put into high temperature furnace, burnt altogether 1 ~ 5 hour between 1350 ~ 1600 degree, can prepare the complete totally enclosed U-shaped zirconia body with various function cavitys and measuring unit in top, its external oxidation zirconium thin layer mill is opened to certain position, open the first diffusion barrier layer, just finally formed this utility model described with 7 lead-in wire tubular type nitrogen oxide sensor induction main bodys.
Simple in structure by the nitrogen oxide sensor that above step is prepared, technology difficulty is little; And respond to main body only by two-layer tubular type zirconia functional layer member, and built-in heating rod, make whole induction body temperature even, effectively improved measuring accuracy; The tubular structure heat resistanceheat resistant that significantly the improved finished product performance of shaking in addition can extend serviceable life of product, improves the stability in use of product.
Claims (4)
1. nitrogen oxide sensor, it is characterized in that, it comprises inner U-shaped tubular zirconium-oxide (1) with step, external oxidation zirconium thin layer (2), heating rod (3), be provided with first between the U-shaped tubular zirconium-oxide in described inside (1) and external oxidation zirconium thin layer (2) and measure chamber (4), second measures chamber (5) and reference air chamber (6), described first measures chamber (4) communicates with the extraneous atmosphere of measuring through the first diffusion barrier layer (7), second measures chamber (5) communicates with the first atmosphere of measuring in chamber (4) through the second diffusion barrier layer (8), described reference air chamber (6) is closed and extraneous gas isolating by separation layer (9), in establish reference air electrode (14), the described first external oxidation zirconium thin layer (2) both sides of measuring chamber (4) arrange respectively the first pump oxygen unit negative electrode (10) and the second pump oxygen unit positive electrode (11), formed the first pump oxygen unit, the the described second U-shaped tubular zirconium-oxide in inside (1) both sides of measuring chamber (5) arrange respectively the second pump oxygen unit negative electrode (12) and the second pump oxygen unit positive electrode (13), form the second pump oxygen unit, formation oxygen concentration testing unit between the described first reference air electrode (14) of measuring in chamber (4) internal electrode the first pump oxygen unit negative electrode (10) and reference air chamber (6), between the U-shaped tubular zirconium-oxide in described inside (1) and external oxidation zirconium thin layer (2), direct contact portion is kept apart by alumina insulation thin layer (15), formed reference air duct (16) between described U-shaped tubular zirconium-oxide (1) and heating rod (3).
2. nitrogen oxide sensor according to claim 1, is characterized in that, reference air electrode (14) also can be arranged on U-shaped tubular zirconium-oxide (1) inside.
3. nitrogen oxide sensor according to claim 1, it is characterized in that, on the step of U-shaped tubular zirconium-oxide, electrode contacts is set, comprise the outside the first electrode contacts (17), the outside the second electrode contacts (18) and third electrode contact, the outside (19), with convenient U-shaped tubular zirconium-oxide (1) lateral electrode, comprise the first pump oxygen unit negative electrode (10), the first pump oxygen unit positive electrode (11), the second pump oxygen unit negative electrode (12) is connected 14 with the reference air electrode) signal connect, specific as follows: due to insulation between the U-shaped tubular zirconium-oxide in inside (1) and external oxidation zirconium thin layer (2), the negative electrode (12) of the negative electrode (10) of its first pump oxygen unit and the second pump oxygen unit can be connected on the outside the first electrode contacts (17) by conllinear, the first pump oxygen unit positive electrode (11) is connected with third electrode contact, the outside (19), reference air electrode (14) is connected on the outside the second electrode contacts (18), only there is second a pump oxygen unit positive electrode (13) U-shaped tubular zirconium-oxide (1) inboard, can single medial electrode contact (20) be set by opening end is connected with signal wire, the outside the first electrode contacts (17), the outside the second electrode contacts, (18) third electrode contact, the outside (19) is connected with 4 signal wires respectively with medial electrode contact (20), add the well heater control loop and need 2 lead-in wires, just formed the tubular type nitrogen oxide sensor with 6 wires.
4. nitrogen oxide sensor according to claim 1, it is characterized in that, on the step of U-shaped tubular zirconium-oxide, electrode contacts is set, comprise the outside the first electrode contacts (17), the outside the second electrode contacts (18) and third electrode contact, the outside (19), with convenient U-shaped tubular zirconium-oxide (1) lateral electrode, comprise the first pump oxygen unit negative electrode (10), the first pump oxygen unit positive electrode (11) be connected the signal of pump oxygen unit negative electrode (12) and connect, specific as follows: the negative electrode (10) of the first pump oxygen unit is connected on the outside the first electrode contacts (17), the negative electrode (12) of the second pump oxygen unit is connected on the outside the second electrode contacts (18), the first pump oxygen unit positive electrode (11) is connected with third electrode contact, the outside (19), due to the negative electrode (10) of the first pump oxygen unit be connected the negative electrode (12) of pump oxygen unit and connect without conllinear, need not to take insulation measures between inner U-shaped tubular zirconium-oxide (1) and external oxidation zirconium thin layer (2), directly combination, there are the second pump oxygen unit positive electrode (13) and reference air electrode (14) in U-shaped tubular zirconium-oxide (1) inboard, can be by divide the medial electrode contact, two contacts (20) that is arranged at opening end, inboard the second electrode contacts (21) is connected with signal wire, the outside the first electrode contacts (17), the outside the second electrode contacts, (18) third electrode contact (19), the outside, medial electrode contact (20) is connected with 5 signal wires respectively with inboard the second electrode contacts (21), add the well heater control loop and need 2 lead-in wires, just formed the tubular type nitrogen oxide sensor with 7 wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220527517 CN202928983U (en) | 2012-10-16 | 2012-10-16 | Nitrogen-oxygen sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220527517 CN202928983U (en) | 2012-10-16 | 2012-10-16 | Nitrogen-oxygen sensor |
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| CN202928983U true CN202928983U (en) | 2013-05-08 |
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| CN 201220527517 Withdrawn - After Issue CN202928983U (en) | 2012-10-16 | 2012-10-16 | Nitrogen-oxygen sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890109A (en) * | 2012-10-16 | 2013-01-23 | 常州联德电子有限公司 | Nitrogen oxide sensor and manufacturing method thereof |
| CN108258061A (en) * | 2018-01-15 | 2018-07-06 | 山东微感光电子有限公司 | A kind of photodetector of included reference gas chamber and preparation method thereof |
| CN108333243A (en) * | 2018-03-29 | 2018-07-27 | 常州联德电子有限公司 | Intelligent nitrogen oxide sensor induction chip |
| CN114646673A (en) * | 2022-03-11 | 2022-06-21 | 浙江新瓷智能科技股份有限公司 | NO (nitric oxide)xGas sensor |
-
2012
- 2012-10-16 CN CN 201220527517 patent/CN202928983U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102890109A (en) * | 2012-10-16 | 2013-01-23 | 常州联德电子有限公司 | Nitrogen oxide sensor and manufacturing method thereof |
| CN102890109B (en) * | 2012-10-16 | 2014-08-06 | 常州联德电子有限公司 | Nitrogen oxide sensor and manufacturing method thereof |
| CN108258061A (en) * | 2018-01-15 | 2018-07-06 | 山东微感光电子有限公司 | A kind of photodetector of included reference gas chamber and preparation method thereof |
| CN108258061B (en) * | 2018-01-15 | 2019-09-17 | 山东微感光电子有限公司 | A kind of photodetector and preparation method thereof of included reference gas chamber |
| CN108333243A (en) * | 2018-03-29 | 2018-07-27 | 常州联德电子有限公司 | Intelligent nitrogen oxide sensor induction chip |
| CN114646673A (en) * | 2022-03-11 | 2022-06-21 | 浙江新瓷智能科技股份有限公司 | NO (nitric oxide)xGas sensor |
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