CN109358158A - A kind of detection method for judging nitrogen oxide sensor and whether failing - Google Patents
A kind of detection method for judging nitrogen oxide sensor and whether failing Download PDFInfo
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- CN109358158A CN109358158A CN201811166680.9A CN201811166680A CN109358158A CN 109358158 A CN109358158 A CN 109358158A CN 201811166680 A CN201811166680 A CN 201811166680A CN 109358158 A CN109358158 A CN 109358158A
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- nitrogen oxide
- oxide sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- 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
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/007—Arrangements to check the analyser
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Abstract
The invention discloses a kind of detection methods for judging nitrogen oxide sensor and whether failing, and include the following steps, S1, open nitrogen oxide sensor, check whether connection and communication between control unit are normal；S2, standby a big cube box and a small cube box, nitrogen oxide sensor is placed in small cube cassette, and be will test end and exposed, then small cube cassette is put into big cube cassette, and by big cube cassette vacuum state；S3 judges the accuracy in detection to oxygen；S4 judges the accuracy in detection to nitrogenous gas.The present invention will test result and compare with calculated result by inputting a certain amount of oxygen or nitrogenous gas into known volume vacuum box, can accurately judge the accuracy of nitrogen oxide sensor testing result, and whether meet the required precision of detection.
Description
Technical field
The present invention relates to nitrogen oxide sensor technical field more particularly to a kind of detections for judging nitrogen oxide sensor and whether failing
Method.
Background technique
General sensor can measure resistance, voltage or signal value output by multimeter whether to judge sensor
Damage, but nitrogen oxide sensor is intelligent parts, and other than power supply, signal is exported by CAN bus, cannot pass through multimeter
Sensor signal is obtained Deng simple equal tools to judge whether sensor damages, we have devised a kind of judgement nitrogen oxygen biography thus
Detection method that whether sensor fails solves problem above.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of judgement nitrogen oxide sensor proposed
The detection method whether to fail.
To achieve the goals above, present invention employs following technical solutions:
A kind of detection method for judging nitrogen oxide sensor and whether failing, includes the following steps,
S1 opens nitrogen oxide sensor, checks whether connection and communication between control unit are normal；
S2, standby a big cube box and a small cube box, nitrogen oxide sensor is placed in small cube cassette, and
It will test end to expose, then small cube cassette is put into big cube cassette, and by big cube cassette vacuum state；
S3 starts nitrogen oxide sensor and inputs certain oxygen in the big cube cassette then into S2, according to size cube cassette
Volume differences and input amount of oxygen, the numerical value and variation tendency of oxygen concentration in big cube cassette can be calculated, by with nitrogen oxygen
The numerical value that sensor detects compares and analyzes, and can determine whether it meets examination requirements to the detection sensitivity of oxygen；
S4 starts nitrogen oxide sensor and inputs certain nitrogenous gas in the big cube cassette then into S2, vertical according to size
The volume differences of square box and the nitrogenous gas amount of input can calculate the numerical value of nitrogenous gas concentration and variation in big cube cassette and become
Gesture can determine whether that it is to the detection sensitivity of nitrogenous gas by comparing and analyzing with the numerical value that nitrogen oxide sensor detects
It is no to meet examination requirements.
Preferably, whether the inspection in the S1, the connection of main nitrogen oxide sensor and host computer and display screen are normal.
Preferably, the size of big cube box is 50cm × 50cm × 50cm in S2, the size of small cube cassette be 15cm ×
15cm×15cm。
It preferably, is by vacuum pump in the S2 by the air vacuum state in big cube cassette.
Preferably, the oxygen injected in S3 uses pure oxygen.
Preferably, the nitrogenous gas injected in S3 is pure nitric oxide or nitrogen dioxide.
Compared with prior art, the beneficial effects of the present invention are:
1, easy to operate, by inputting a certain amount of oxygen or nitrogenous gas into known volume vacuum box, and will inspection
It surveys result to compare with calculated result, can accurately judge the accuracy of nitrogen oxide sensor testing result, and whether full
The required precision detected enough；
2, when detecting, nitrogenous gas and oxygen is detected respectively, can accurately judge nitrogen oxygen convenient for staff
The failure of sensor is convenient for subsequent overhaul plan.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, instead of all the embodiments.
Embodiment one
A kind of detection method for judging nitrogen oxide sensor and whether failing, includes the following steps,
S1 opens nitrogen oxide sensor, checks whether connection and communication between control unit are normal；
S2, standby a big cube box and a small cube box, nitrogen oxide sensor is placed in small cube cassette, and
It will test end to expose, then small cube cassette is put into big cube cassette, and by big cube cassette vacuum state；
S3 starts nitrogen oxide sensor and inputs certain oxygen in the big cube cassette then into S2, according to size cube cassette
Volume differences and input amount of oxygen, the numerical value and variation tendency of oxygen concentration in big cube cassette can be calculated, by with nitrogen oxygen
The numerical value that sensor detects compares and analyzes, and can determine whether it meets examination requirements to the detection sensitivity of oxygen；
S4 starts nitrogen oxide sensor and inputs certain nitric oxide in the big cube cassette then into S2, vertical according to size
The volume differences of square box and the nitric oxide amount of input, the numerical value and variation that can calculate big cube cassette intracellular nitric oxide concentration become
Gesture can determine whether that it is to nitric oxide production detection sensitivity by comparing and analyzing with the numerical value that nitrogen oxide sensor detects
It is no to meet examination requirements.
Embodiment two
A kind of detection method for judging nitrogen oxide sensor and whether failing, includes the following steps,
S1 opens nitrogen oxide sensor, checks whether connection and communication between control unit are normal；
S2, standby a big cube box and a small cube box, nitrogen oxide sensor is placed in small cube cassette, and
It will test end to expose, then small cube cassette is put into big cube cassette, and by big cube cassette vacuum state；
S3 starts nitrogen oxide sensor and inputs certain oxygen in the big cube cassette then into S2, according to size cube cassette
Volume differences and input amount of oxygen, the numerical value and variation tendency of oxygen concentration in big cube cassette can be calculated, by with nitrogen oxygen
The numerical value that sensor detects compares and analyzes, and can determine whether it meets examination requirements to the detection sensitivity of oxygen；
S4 starts nitrogen oxide sensor and inputs certain nitrogen dioxide in the big cube cassette then into S2, vertical according to size
The volume differences of square box and the titanium dioxide nitrogen quantity of input can calculate the numerical value of content of nitrogen dioxide and variation in big cube cassette and become
Gesture can determine whether that it is to the detection sensitivity of nitrogen dioxide by comparing and analyzing with the numerical value that nitrogen oxide sensor detects
It is no to meet examination requirements.
In above-described embodiment, in the detection of each S3 and S4, oxygen density is calculated are as follows: ρOxygen=mOxygen/(VGreatly-VIt is small), contain nitrogen
In body, the density of nitrogen: ρNitrogen=mNitrogen/(VGreatly-VIt is small), wherein VGreatly、VIt is smallRespectively represent the volume of big cube cassette, small cube cassette.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of detection method for judging nitrogen oxide sensor and whether failing, which is characterized in that include the following steps,
S1 opens nitrogen oxide sensor, checks whether connection and communication between control unit are normal；
S2, standby a big cube box and a small cube box, nitrogen oxide sensor is placed in small cube cassette, and will inspection
It surveys end to expose, then small cube cassette is put into big cube cassette, and by big cube cassette vacuum state；
S3 starts nitrogen oxide sensor and inputs certain oxygen in the big cube cassette then into S2, according to the body of size cube cassette
The amount of oxygen of product moment and input can calculate the numerical value and variation tendency of oxygen concentration in big cube cassette, by sensing with nitrogen oxygen
The numerical value that device detects compares and analyzes, and can determine whether it meets examination requirements to the detection sensitivity of oxygen；
S4 starts nitrogen oxide sensor and inputs certain nitrogenous gas in the big cube cassette then into S2, according to size cube cassette
Volume differences and input nitrogenous gas amount, the numerical value and variation tendency of nitrogenous gas concentration in big cube cassette can be calculated, lead to
It crosses the numerical value detected with nitrogen oxide sensor to compare and analyze, can determine whether it meets the detection sensitivity of nitrogenous gas
Examination requirements.
2. a kind of detection method for judging nitrogen oxide sensor and whether failing according to claim 1, which is characterized in that described
Whether the inspection in S1, the connection of main nitrogen oxide sensor and host computer and display screen are normal.
3. a kind of detection method for judging nitrogen oxide sensor and whether failing according to claim 1, which is characterized in that in S2
The size of big cube box is 50cm × 50cm × 50cm, and the size of small cube cassette is 15cm × 15cm × 15cm.
4. a kind of detection method for judging nitrogen oxide sensor and whether failing according to claim 1, which is characterized in that described
It is by vacuum pump in S2 by the air vacuum state in big cube cassette.
5. a kind of detection method for judging nitrogen oxide sensor and whether failing according to claim 1, which is characterized in that in S3
The oxygen of injection uses pure oxygen.
6. a kind of detection method for judging nitrogen oxide sensor and whether failing according to claim 1, which is characterized in that in S3
The nitrogenous gas of injection is pure nitric oxide or nitrogen dioxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811166680.9A CN109358158A (en) | 2018-10-08 | 2018-10-08 | A kind of detection method for judging nitrogen oxide sensor and whether failing |
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| CN201811166680.9A CN109358158A (en) | 2018-10-08 | 2018-10-08 | A kind of detection method for judging nitrogen oxide sensor and whether failing |
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| JP2013108419A (en) * | 2011-11-18 | 2013-06-06 | Isuzu Motors Ltd | Failure diagnosis method for nox sensor, failure diagnosis system for nox sensor, and internal combustion engine |
| CN104279036A (en) * | 2014-09-01 | 2015-01-14 | 潍柴动力股份有限公司 | Fault detection method and device of wide-range oxygen sensor |
| CN105588916A (en) * | 2014-11-12 | 2016-05-18 | 长沙理工大学 | Flowing/static two-purpose gas sensor test system |
| US20160209383A1 (en) * | 2015-01-16 | 2016-07-21 | Cummins Emission Solutions, Inc. | Nox sensor diagnostic system and method |
| JP2017129082A (en) * | 2016-01-21 | 2017-07-27 | 株式会社デンソー | NOx SENSOR DIAGNOSING DEVICE FOR INTERNAL COMBUSTION ENGINE |
| CN108150262A (en) * | 2017-12-22 | 2018-06-12 | 中国第汽车股份有限公司 | Judge the detection method whether nitrogen oxide sensor fails |
-
2018
- 2018-10-08 CN CN201811166680.9A patent/CN109358158A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162811A (en) * | 2010-02-23 | 2011-08-24 | 中国科学院电工研究所 | Calibration device and method of sensor for detecting diesel engine oxynitride discharge |
| JP2013108419A (en) * | 2011-11-18 | 2013-06-06 | Isuzu Motors Ltd | Failure diagnosis method for nox sensor, failure diagnosis system for nox sensor, and internal combustion engine |
| CN104279036A (en) * | 2014-09-01 | 2015-01-14 | 潍柴动力股份有限公司 | Fault detection method and device of wide-range oxygen sensor |
| CN105588916A (en) * | 2014-11-12 | 2016-05-18 | 长沙理工大学 | Flowing/static two-purpose gas sensor test system |
| US20160209383A1 (en) * | 2015-01-16 | 2016-07-21 | Cummins Emission Solutions, Inc. | Nox sensor diagnostic system and method |
| JP2017129082A (en) * | 2016-01-21 | 2017-07-27 | 株式会社デンソー | NOx SENSOR DIAGNOSING DEVICE FOR INTERNAL COMBUSTION ENGINE |
| CN108150262A (en) * | 2017-12-22 | 2018-06-12 | 中国第汽车股份有限公司 | Judge the detection method whether nitrogen oxide sensor fails |
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Application publication date: 20190219 |
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