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Detection method for judging whether nitrogen-oxygen sensor is invalid

A technology of nitrogen and oxygen sensor and detection method, applied in the field of nitrogen and oxygen sensor, can solve the problems of acquiring sensor signal sensor, etc., and achieve the effect of simple operation and convenient maintenance and treatment

Inactive Publication Date: 2019-02-19
NINGBO ANCHUANG ELECTRONICS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Ordinary sensors can judge whether the sensor is damaged by measuring the resistance, voltage or signal output value of the multimeter, but the nitrogen and oxygen sensor is an intelligent component. In addition to the power supply, the signal is output through the CAN bus, and it is impossible to obtain the sensor signal through simple tools such as a multimeter. To determine whether the sensor is damaged, we have designed a detection method to determine whether the nitrogen and oxygen sensor is invalid to solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A detection method for judging whether a nitrogen and oxygen sensor fails, comprising the following steps,

[0021] S1, turn on the nitrogen oxygen sensor, check whether the line connection and the communication with the control unit are normal;

[0022] S2, prepare a large cube box and a small cube box, put the nitrogen and oxygen sensor in the small cube box, and expose the detection end, then put the small cube box into the big cube box, and pull out the big cube box into a vacuum state;

[0023] S3, start the nitrogen and oxygen sensor and then input a certain amount of oxygen into the large cubic box in S2, according to the volume difference between the large and small cubic boxes and the amount of oxygen input, the value and change trend of the oxygen concentration in the large cubic box can be calculated. Comparative analysis of the values ​​detected by the nitrogen and oxygen sensor can determine whether its detection sensitivity to oxygen meets the inspection ...

Embodiment 2

[0026] A detection method for judging whether a nitrogen and oxygen sensor fails, comprising the following steps,

[0027] S1, turn on the nitrogen oxygen sensor, check whether the line connection and the communication with the control unit are normal;

[0028] S2, prepare a large cube box and a small cube box, put the nitrogen and oxygen sensor in the small cube box, and expose the detection end, then put the small cube box into the big cube box, and pull out the big cube box into a vacuum state;

[0029] S3, start the nitrogen and oxygen sensor and then input a certain amount of oxygen into the large cubic box in S2, according to the volume difference between the large and small cubic boxes and the amount of oxygen input, the value and change trend of the oxygen concentration in the large cubic box can be calculated. Comparative analysis of the values ​​detected by the nitrogen and oxygen sensor can determine whether its detection sensitivity to oxygen meets the inspection ...

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Abstract

The invention discloses a detection method for judging whether a nitrogen-oxygen sensor is invalid. The method comprises the following steps of: S1, opening the nitrogen-oxygen sensor, checking whether the line connection and the communication between the nitrogen-oxygen sensor and a control unit are normal; S2, preparing a large cube box and a small cube box, placing the nitrogen-oxygen sensor inthe small cube box, exposing the detection end of the sensor, and then placing the small cube box into the large cube box, and pumping the large cube box into a vacuum state; S3, judging the detection accuracy of oxygen; and S4, judging the detection accuracy of the nitrogen-containing gas. According to the detection method for judging whether the nitrogen-oxygen sensor is invalid, the accuracy of the detection result of the nitrogen-oxygen sensor and whether the accuracy meets the accuracy requirements of the detection can be accurately judged by inputting a certain amount of oxygen or nitrogen-containing gas into a vacuum box of known volume and comparing the detection result with the calculation result.

Description

technical field [0001] The invention relates to the technical field of nitrogen and oxygen sensors, in particular to a detection method for judging whether the nitrogen and oxygen sensors fail. Background technique [0002] Ordinary sensors can judge whether the sensor is damaged by measuring the resistance, voltage or signal output value of the multimeter, but the nitrogen and oxygen sensor is an intelligent component. In addition to the power supply, the signal is output through the CAN bus, and it is impossible to obtain the sensor signal through simple tools such as a multimeter. To determine whether the sensor is damaged, we have designed a detection method to determine whether the nitrogen and oxygen sensor is invalid to solve the above problems. Contents of the invention [0003] The object of the present invention is to solve the shortcomings in the prior art, and propose a detection method for judging whether the nitrogen and oxygen sensor is invalid. [0004] In...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00
CPCG01N33/007
Inventor 楼夙训
Owner NINGBO ANCHUANG ELECTRONICS TECH CO LTD
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