CN203798765U - Oxygen sensor - Google Patents
Oxygen sensor Download PDFInfo
- Publication number
- CN203798765U CN203798765U CN201320850261.3U CN201320850261U CN203798765U CN 203798765 U CN203798765 U CN 203798765U CN 201320850261 U CN201320850261 U CN 201320850261U CN 203798765 U CN203798765 U CN 203798765U
- Authority
- CN
- China
- Prior art keywords
- oxygen
- module
- probe
- lambda sensor
- chip microcomputer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 47
- 239000001301 oxygen Substances 0.000 title claims abstract description 47
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 47
- 239000000523 sample Substances 0.000 claims abstract description 32
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims abstract description 12
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000001514 detection method Methods 0.000 claims abstract description 9
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 108010083687 Ion Pumps Proteins 0.000 abstract 4
- 238000012360 testing method Methods 0.000 description 9
- 230000006870 function Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000027734 detection of oxygen Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- -1 oxonium ion Chemical class 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- ISSXKNWTCLRPJY-UHFFFAOYSA-N O.O.[O-2].[Zr+4].[O-2] Chemical compound O.O.[O-2].[Zr+4].[O-2] ISSXKNWTCLRPJY-UHFFFAOYSA-N 0.000 description 1
- 101001128814 Pandinus imperator Pandinin-1 Proteins 0.000 description 1
- 101001024685 Pandinus imperator Pandinin-2 Proteins 0.000 description 1
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003412 degenerative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Landscapes
- Measuring Oxygen Concentration In Cells (AREA)
Abstract
The utility model provides an oxygen sensor, which comprises an oxygen probe (1), a probe heating module (4), an internal power supply module (3), a signal amplifier (5), an ion pump (7), a logic detection module (6) and a single chip microcomputer (8), wherein the oxygen probe (1) is composed of two zirconium dioxide plates; an electrode is led out on the zirconium dioxide plate; the probe heating module (4) is used for heating the oxygen probe (1); the internal power supply module (3) is used for supply power supply to the probe heating module (4); the signal amplifier (5) is connected to one electrode of the oxygen probe (1); the ion pump (7) is connected to the other electrode of the oxygen probe (1); the logic detection module (6) is connected between the signal amplifier (5) and the ion pump (7); the single chip microcomputer (8) is used for measuring oxygen potential; the single chip microcomputer (8) is connected to a logic monitoring module; and the oxygen probe (1), the signal amplifier (5), the logic detection module (6) and the ion pump (7) form a negative feedback loop. The oxygen sensor disclosed by the utility model is in no need of reference gas in the working process and has the fault monitoring function, and therefore, the technical disadvantages of the existing oxygen sensor are effectively solved.
Description
Technical field
The utility model relates to gas perception field, is specifically related to a kind of oxygen sensor device.
Background technology
The detection of oxygen concentration, along with social development, occupies more and more consequence, in environment measuring field, product detection field, medical life science all need to carry out the detection of oxygen concentration.Now widely used lambda sensor is concentration difference type Zirconium oxide oxygen sensor, the main tubular structure that adopts, this lambda sensor inside is comprised of element locks such as ceramic sensing head, electrode pads, Compress Spring and signal conductors, exist machinery and equipment range of application narrow, cost is expensive, shaping speed is slow, the maintenance of die cost and attached peripheral equipment be difficult for and cost high, the shortcoming such as serviceable life is short.
The raising of people to environmental consciousness, recognizes that automotive emissions are to atmospheric destruction, and people have higher requirement to the cost of lambda sensor, sensitivity and rate of activation.
Summary of the invention
For the problems referred to above, pass through years of researches, the utility model provides a kind of lambda sensor, in this lambda sensor applied range, long working life, the course of work, without reference gas and have malfunction monitoring function, has effectively solved the technological deficiency of existing lambda sensor.
A lambda sensor, comprising:
Oxygen probe 1, it consists of two blocks of zirconium dioxide plates, wherein at zirconium dioxide plate, leads to electrode; Probe heating module 4, it is oxygen probe 1 heating; In-line power module 3, its for probe heating module 4 power supply is provided; For the oxygen electromotive force of described electrode is carried out to amplifying signal amplifier 5, it is connected to an electrode of described oxygen probe 1; Ionic pump 7, it is connected to another electrode of described oxygen probe 1; Logic detection module 6, it is connected between described signal amplifier 5 and described ionic pump 7; For measuring the single-chip microcomputer 8 of described oxygen electromotive force, described single-chip microcomputer 8 is connected to described logic monitoring modular 6; Wherein, oxygen probe 1, signal amplifier 5, logic monitoring modular 6 and ionic pump 7 form negative feedback loop.
Preferably, described lambda sensor, also comprises: pedestal 2, and it is stainless steel chassis; Feeler lever 11, its one end is connected with set nut by metal O type circle with pedestal 2, and the other end is connected mechanically with oxygen probe 3.
Preferably, described lambda sensor, also comprises: charactron display module 9, and it is comprised of display interface device chip 8279 and driving circuit, and charactron display module 9 is connected to the channel of the output analog current signal of described single-chip microcomputer 8.
Preferably, described lambda sensor, also comprises: electric current and voltage output module 10, it is connected to the output voltage alternation digital signal value of described single-chip microcomputer 8 or the channel of electric current alternation digital signal value.
Preferably, described lambda sensor, also comprises: RS485 bus communication module 12, it is connected to described single-chip microcomputer 8.
Preferably, described lambda sensor, also comprises: temperature controller 15, it adopts LM25576 to realize.
Preferably, described lambda sensor, logic detection module 6, integrated high precision small signal amplifier, photoelectrical coupler assembly, and input, output and power supply three isolation.
Preferably, described lambda sensor, the length of feeler lever 11 is according to being set by the size of oxygen determination quantity space, and during installation, downward-sloping 15 spend.
Compared with the existing technology, the technical scheme that the utility model provides, has the following advantages:
1, the utility model lambda sensor is in the course of the work without reference gas, be particularly suitable for using in the robotization of industrial combustion furnace and control neutralization for system (air channel not accessible or sealing, the measurement of the oxygen content container etc.), tested mixed gas upper temperature limit can reach 250 ℃.
2, the utility model lambda sensor has malfunction monitoring function, without guaranteeing reliability with extra oxygen sensor.Can monitor in use procedure the duty of self, the fault of report electric wiring and sensor simultaneously.The analysis of test data completes by the equipment by user's postposition with processing, and this equipment depends on user's technical descriptioon.(as: fuel is controlled, and shows measurement instrument, programmable logic controller (PLC) PLC, ventilating system etc.).
3, the utility model lambda sensor does not need professional and calibrating gas, under atmospheric conditions, can automatically complete calibration.
4, the utility model lambda sensor, in measuring process without chemical mediator, is longer than electrochemical sensor serviceable life.
5, the utility model lambda sensor original measurement is the oxygen partial pressure of mixed gas, but by calibration, can easily output be converted to the volumetric concentration of oxygen.
Accompanying drawing explanation
Fig. 1 is the utility model lambda sensor structural drawing;
Fig. 2 is a kind of schematic diagram of lambda sensor;
Figure 31 is a kind of lambda sensor front elevation;
Figure 32 is the positive vertical view of a kind of lambda sensor.
Reference numeral
1 oxygen probe
2 pedestals
3 in-line power modules
4 probe heating modules
5 signal amplifiers
6 logic detection modules
7 ionic pumps
8 single-chip microcomputers
9 charactron display modules
10 electric current and voltage output modules
11 feeler levers
12 RS485 bus communication modules
13 test modules
14 pulses, fault alarm output module
15 temperature controllers
16 welding bases
17 waterproof devices.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail, but not as to restriction of the present utility model.
As shown in Figure 1, a kind of lambda sensor, for measuring the oxygen content of mixed gas, core component is one and take zirconium dioxide (ZrO2) as basic Dynamic Oxygen gas sensor, it usings the dynamic process of the closed cavity that two blocks of zirconium dioxide plates form as Fundamentals of Measurement, after powering on, in-line power module 3 produces the operating voltage of internal system, for oxygen probe 4 heating, upper electric preheating through certain hour, zirconium dioxide in oxygen probe 4 is after reaching the working temperature of 700 ℃, zirconium dioxide increase enlivens oxonium ion, zirconia ceramic inside will produce the migration of a series of reaction and oxonium ion, at this moment by the extraction electrode of zirconium dioxide both sides, measure stable millivolt level signal, it is oxygen electromotive force.
Two zirconium dish structures of lambda sensor uniqueness, make oxygen probe 4, signal amplifier 5, logic monitoring modular 6 and ionic pump 7 form stable negative feedback loop, when temperature reaches 700 ℃ and when stable, the cycle length of degenerative pulse output signals, with the linear direct ratio of oxygen amount.
Single-chip microcomputer 8 Gather and input signals and formation control input signal, utilize PWM output to realize D/A conversion, the electric current alternation digital signal value (K2 channel) of the analog current signal of output (K1 channel), 0-10V voltage alternating signal value or 4-20m; RS485 bus communication module 12, it completes oxygen amount transmission, in the mode of software command, has substituted the hardware capabilitys such as test, automatic calibration and fault alarm, has simplified greatly the use of rear end equipment.。
Feeler lever 11 one end are connected with set nut by metal O type circle with pedestal 2, and the other end is connected mechanically with oxygen probe 3.
Test module 13, outside input TEST test signal, test module 13 changes ionic pump loop current, thereby simulated the change of oxygen amount, in order to the duty of test macro, whether react good, when the phase value of K1 channel alternation digital signal is continuously 5V (high phase place) or 0V (low phase place), the length of low phase place is measuring of oxygen concentration, or the low phase place sum of high phase place has exceeded the time window of 0.2s-4s, or during the output valve difference > 4% of K1 channel and K2 channel, sensor fault now, the total maintenance of output 0V is hardware fault, otherwise lambda sensor normal operation, pulse, fault alarm output module 14, alarm display lamp and aligning key are set on it, work as sensor fault, offer the air at least 30 seconds of lambda sensor atmospheric environment, short circuit K2 channel and Power Groud 10 seconds, lambda sensor will carry out self calibration or manually press and hold reset key, until output approaches in required value ± 20% deviation range, carry out manual calibration.If the oxygen content value newly measuring is in 10% error range, channel K1 continues the output signal of an alternation of output.If power interruption appearance, new calibration value still can be saved.
Lambda sensor adopts seven multiplexing pin connectors and seven core on-site cable lines to connect downstream units.Different according to the rear end connected mode of test, calibration and fault alarm function, be divided into numeral, two kinds of mode of operations of serial ports, respective pins is defined as follows table.
Analog signal output can be selected 0～10V voltage signal or 4～20mA current signal by internal jumper.Serial ports mode of operation is mainly recommended RS485 bus operation mode.UART be the serial ports of single-chip microcomputer without the direct output of RS485 chip, both uses on software are identical, all operations is semiduplex mode.
Button on shell, directly connects inner calibration input end, facilitates user to carry out calibration function.
For routine, use, sensor is connected power supply by Pin1, Pin2 with Pin7.Measured value outputs to surveying instrument instrument by Pin3 and Pin5 (4～20mA/0～10V) or Pin4 and Pin6 (RS485 bus), show or the equipment such as PLC on.
Table 1
In the overall process of operation, the whole system of lambda sensor monitoring self, sensor states, in Table 2, in addition, in the situation that only needing a lambda sensor, guarantees it is failure-free operation during following situations:
(1) simulating signal and the digital signal of output meet mutually.
(2) measuring-signal in channel K2 should be in official hour window, and is not static.
(3) self check wants correct periodic circulation to carry out.
Table 2
Figure 31, Figure 32 show respectively described lambda sensor front elevation and vertical view.
The metal cast aluminium shell of stainless steel protection pedestal 2 in-built whole electronic components; one end is arranged on feeler lever 11 mechanically; this feeler lever can be to be made by the stainless steel of a diameter 12mm length 200mm (or customization), and the other end of feeler lever 11 connects oxygen probe 1.
Those skilled in the art can make various modifications or be equal to replacement the utility model in essence of the present utility model and protection domain, this modification or be equal to replacement and also should be considered as dropping in protection domain of the present utility model.
Claims (1)
1. a lambda sensor, is characterized in that, comprising:
Oxygen probe (1), it consists of two blocks of zirconium dioxide plates, wherein at zirconium dioxide plate, leads to electrode;
Probe heating module (4), it is oxygen probe (1) heating;
In-line power module (3), it is that probe heating module (4) provides power supply;
For the oxygen electromotive force of described electrode is carried out to amplifying signal amplifier (5), it is connected to an electrode of described oxygen probe (1);
Ionic pump (7), it is connected to another electrode of described oxygen probe (1);
Logic detection module (6), it is connected between described signal amplifier (5) and described ionic pump (7);
For measuring the single-chip microcomputer (8) of described oxygen electromotive force, described single-chip microcomputer (8) is connected to described logic monitoring modular (6);
Wherein, oxygen probe (1), signal amplifier (5), logic monitoring modular (6) and ionic pump (7) form negative feedback loop.
2. lambda sensor according to claim 1, is characterized in that, also comprises:
Pedestal (2), it is stainless steel chassis;
Feeler lever (11), its one end is connected with set nut by metal O type circle with pedestal (2), and the other end is connected mechanically with oxygen probe (3).
3. lambda sensor according to claim 1, is characterized in that, also comprises:
Charactron display module (9), it is comprised of display interface device chip 8279 and driving circuit, and charactron display module (9) is connected to the channel of the output analog current signal of described single-chip microcomputer (8).
4. lambda sensor according to claim 1, is characterized in that, also comprises:
Electric current and voltage output module (10), it is connected to the output voltage alternation digital signal value of described single-chip microcomputer (8) or the channel of electric current alternation digital signal value.
5. lambda sensor according to claim 1, is characterized in that, also comprises:
RS485 bus communication module (12), it is connected to described single-chip microcomputer (8).
6. lambda sensor according to claim 1, is characterized in that, also comprises:
Temperature controller (15), it adopts LM25576 to realize.
7. lambda sensor according to claim 1, is characterized in that, described logic detection module (6), integrated high precision small signal amplifier, photoelectrical coupler assembly, and input, output and power supply three isolation.
8. lambda sensor according to claim 1, is characterized in that, the length of described feeler lever (11) is according to being set by the size of oxygen determination quantity space, downward-sloping 15 degree during installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850261.3U CN203798765U (en) | 2013-12-23 | 2013-12-23 | Oxygen sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320850261.3U CN203798765U (en) | 2013-12-23 | 2013-12-23 | Oxygen sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203798765U true CN203798765U (en) | 2014-08-27 |
Family
ID=51380970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320850261.3U Expired - Lifetime CN203798765U (en) | 2013-12-23 | 2013-12-23 | Oxygen sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203798765U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182877A (en) * | 2015-09-15 | 2015-12-23 | 沈阳飞机工业（集团）有限公司 | Carbon potential control system of dual-oxygen-probe unit and using method thereof |
| CN110687187A (en) * | 2019-11-21 | 2020-01-14 | 深圳市久驰精密科技有限公司 | Gas oxygen concentration sensor |
| CN111913409A (en) * | 2019-05-07 | 2020-11-10 | 上海宝信软件股份有限公司 | Bell-type furnace oxygen content detection device |
| CN115452919A (en) * | 2022-09-21 | 2022-12-09 | 湖南爱益森科技有限公司 | Measurement system based on ceramic zirconia oxygen sensor in dispersed oxygen |
-
2013
- 2013-12-23 CN CN201320850261.3U patent/CN203798765U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182877A (en) * | 2015-09-15 | 2015-12-23 | 沈阳飞机工业（集团）有限公司 | Carbon potential control system of dual-oxygen-probe unit and using method thereof |
| CN111913409A (en) * | 2019-05-07 | 2020-11-10 | 上海宝信软件股份有限公司 | Bell-type furnace oxygen content detection device |
| CN111913409B (en) * | 2019-05-07 | 2022-03-08 | 上海宝信软件股份有限公司 | Bell-type furnace oxygen content detection device |
| CN110687187A (en) * | 2019-11-21 | 2020-01-14 | 深圳市久驰精密科技有限公司 | Gas oxygen concentration sensor |
| CN115452919A (en) * | 2022-09-21 | 2022-12-09 | 湖南爱益森科技有限公司 | Measurement system based on ceramic zirconia oxygen sensor in dispersed oxygen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |
|
| CX01 | Expiry of patent term |