Nitrogen-oxygen sensor calibration testing device

Abstract

A nitrogen-oxygen sensor calibration testing device comprises a calibration table which is a pipeline device of a hollow structure, and a standard component nitrogen-oxygen sensor and a probe of a calibrated nitrogen-oxygen sensor extend into the pipeline device and are fixed; the gas distribution table is connected with the pipeline device and used for conveying NOx and O2 mixed gas for calibration to the pipeline device; and the calibration test control computer is connected with the standard component nitrogen-oxygen sensor and the calibrated nitrogen-oxygen sensor and is used for reading the concentration value of the standard component sensor and writing the concentration value into the calibrated nitrogen-oxygen sensor. The calibration testing device for the nitrogen-oxygen sensor provides a solution which is good in economical efficiency, simple and convenient to operate and reliable in precision, and can effectively improve the production efficiency and the calibration quality of the nitrogen-oxygen sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to the nitrogen oxygen sensor calibration test technology for NOx gas detection, in particular to a nitrogen oxygen sensor calibration test device. BACKGROUND

[0002] The nitrogen oxygen (NOx) sensor needs to be calibrated in the production process to solve the problems of large discreteness and poor consistency of the nitrogen oxygen sensitive ceramic chip. Different NOx, O 2 The concentration of the mixed gas is greatly affected by the gas source accuracy, gas distribution table accuracy and drift. In the calibration process, the gas source consumption is very large, such as using high-precision standard gas, the production cost is too high, and the gas distribution table accuracy itself drifts greatly, which cannot guarantee the stability during long-term use. If a precision gas analyzer is used to test the concentration of the mixed gas, the problem can be solved, but the precision gas analyzer is expensive and not suitable for small enterprises to use.

[0003] It should be noted that the information disclosed in the above background section is only for understanding the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE UTILITY MODEL

[0004] The main purpose of the utility model is to solve the problems in the above background technology, and provide a nitrogen oxygen sensor calibration test device.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A nitrogen oxygen sensor calibration test device, comprising:

[0007] A calibration table, which is a hollow structure pipeline device, and the probe of the standard nitrogen oxygen sensor and the calibrated nitrogen oxygen sensor is inserted into the pipeline device and fixed;

[0008] A gas distribution table connected with the pipeline device for delivering the mixed gas of NOx and O2 for calibration to the pipeline device;

[0009] A calibration test control computer connected with the standard nitrogen oxygen sensor and the calibrated nitrogen oxygen sensor for reading the concentration value of the standard sensor and writing the concentration value into the calibrated nitrogen oxygen sensor.

[0010] Further:

[0011] An electromagnetic valve is arranged on the output channel between the gas distribution table and the pipeline device.

[0012] The standard gas supply device is connected with the pipeline device and is used for delivering standard gas for calibrating the standard nitrogen oxygen sensor to the pipeline device.

[0013] The standard gas supply device includes a plurality of gas cylinders for supplying NOx standard gas with different concentrations, and each gas cylinder is respectively provided with a solenoid valve for controlling gas output.

[0014] The solenoid valve is arranged on an output channel between the standard gas supply device and the pipeline device.

[0015] The nitrogen oxygen sensor calibration testing device has the following beneficial effects:

[0016] The nitrogen oxygen sensor calibration testing device has the following beneficial effects:

[0017] The nitrogen oxygen sensor calibration testing device has the following beneficial effects: The hollow pipeline device is connected with the gas distribution table and is used for delivering mixed gas for calibration. The standard nitrogen oxygen sensor and the probe of the calibrated nitrogen oxygen sensor are inserted into the pipeline device and fixed. The mixed gas with low precision is used in the calibration process under the cooperation of the standard nitrogen oxygen sensor, and the dependence on high-precision standard gas source is reduced, thereby reducing the production cost. Further, the standard gas supply device is used for calibrating the standard nitrogen oxygen sensor. The plurality of gas cylinders are used for supplying NOx standard gas with different concentrations, and each gas cylinder is provided with a solenoid valve for controlling gas output, thereby further improving the precision and flexibility of the calibration process. Overall, the nitrogen oxygen sensor calibration testing device provides an economical, simple and reliable solution, and is particularly suitable for small production enterprises sensitive to cost, and can effectively improve the production efficiency and calibration quality of the nitrogen oxygen sensor.

[0018] Other beneficial effects of the embodiments of the nitrogen oxygen sensor calibration testing device will be further described below. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The nitrogen oxygen sensor calibration testing device is a structure schematic view of the embodiments of the present application. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below. It should be emphasized that the following description is only exemplary and is not intended to limit the scope of the present application and its applications.

[0021] It is to be understood that when an element such as a layer, region or substrate is referred to as being "on" or "connected to" another element, it can be directly on or connected to the other element or intervening elements can be present. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intervening elements present. It will also be understood that, when a device or element is referred to as being "coupled" to another device or element, electrical or mechanical communication can be present between them, although not necessarily directly.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicate directions or positions based on the directions or positions shown in the drawings, and are only used for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, the features defined as "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0024] Referring to Figure 1 , the present application provides a nitrogen oxygen sensor calibration test device, comprising: a calibration table, which is a hollow structure pipeline device, the probe of a standard nitrogen oxygen sensor 1 and a calibrated nitrogen oxygen sensor 2 is inserted into the pipeline device and fixed; a gas distribution table 5 connected with the pipeline device, used for conveying the mixed gas of NOx and O2 for calibration to the pipeline device; a calibration test control computer 8 connected with the standard nitrogen oxygen sensor and the calibrated nitrogen oxygen sensor, used for reading the concentration value of the standard sensor, and writing the concentration value into the calibrated nitrogen oxygen sensor.

[0025] As Figure 1 shown, in the preferred embodiment, an electromagnetic valve 3 is arranged on the output channel between the gas distribution table and the pipeline device. In the preferred embodiment, a standard gas supply device 7 is further included, which is connected with the pipeline device, used for conveying standard gas for calibrating the standard nitrogen oxygen sensor 1 to the pipeline device. The standard gas supply device 7 includes a plurality of gas cylinders for supplying NOx standard gas with different concentrations respectively, and each gas cylinder is respectively configured with an electromagnetic valve 6 for controlling the output of gas. An electromagnetic valve 4 is arranged on the output channel between the standard gas supply device and the pipeline device.

[0026] The specific embodiments of the present application are further described below.

[0027] A nitrogen oxygen sensor calibration testing device, comprising: a calibration platform, a hollow pipe device, a nitrogen oxygen sensor probe inserted into the pipe and fixed, a flowing NOx and O2 mixed gas in the pipe for calibration and testing of the nitrogen oxygen sensor; a nitrogen oxygen sensor as a standard part installed on the calibration platform; a standard gas for calibrating the standard part sensor, three different concentrations of NOx gas are more suitable; a gas distribution platform for producing different concentrations of NOx and O2 mixed gas; a calibration testing control computer for controlling the calibration, calibration and testing process. Control the electromagnetic valve to switch different gases into the calibration platform, read the concentration of the standard part sensor, and then write the concentration value into the calibrated nitrogen oxygen sensor. The measurement value of the nitrogen oxygen sensor can also be collected and compared with the standard part for accuracy to determine whether it is qualified. The testing device can complete the accurate calibration and testing of the nitrogen oxygen sensor in the laboratory.

[0028] A nitrogen oxygen sensor calibration testing device, comprising:

[0029] a calibration platform, a hollow pipe device, a nitrogen oxygen sensor probe inserted into the pipe and fixed, a flowing NOx and O2 mixed gas in the pipe for calibration and testing of the nitrogen oxygen sensor;

[0030] a nitrogen oxygen sensor as a standard part installed on the calibration platform;

[0031] a standard gas for calibrating the standard part sensor, three different concentrations of NOx standard gas are more suitable, such as 100ppm, 500ppm, 1500ppm, which can cover the range of the sensor and ensure sufficient accuracy;

[0032] a gas distribution platform for producing different concentrations of NOx and O2 mixed gas, low-precision NOx gas, nitrogen and air are used to mix different concentrations of mixed gas when gas distribution;

[0033] a calibration testing control computer for controlling the calibration, calibration and testing process. When producing calibration, control the electromagnetic valve to switch mixed gas into the calibration platform, read the concentration value of the standard part sensor, and then write the concentration value into the calibrated nitrogen oxygen sensor. The measurement value of the nitrogen oxygen sensor can also be collected and compared with the standard part output value for accuracy to determine whether it is qualified.

[0034] In the calibration process of nitrogen oxygen sensor production, in order to ensure the system accuracy, the standard sensor needs to be calibrated regularly. The calibration process is automatically completed by computer control. The computer first closes the electromagnetic valve of the gas distribution table output, opens the electromagnetic valve corresponding to the standard gas, controls the electromagnetic valve of the standard gas one by one, guides the standard gas into the calibration table, collects the measurement value of the standard sensor and compares it with the corresponding standard gas concentration value, obtains the deviation of the standard part, if the deviation exceeds the reasonable error, the sensor cannot be used as a standard part, a new standard part needs to be replaced, the deviation value can be used as the correction amount of the sensor accuracy; the calibration process is generally carried out once every 4-6 hours.

[0035] The above is a further detailed description of the utility model in combination with specific / preferred embodiments, and cannot be regarded as the specific implementation of the utility model being limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can make a number of substitutions or modifications to the described embodiments, and these substitution or modification manners should be regarded as belonging to the protection scope of the utility model. In the description of the present specification, the description of the reference terms "an embodiment", "some embodiments", "preferred embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In the case of not contradicting each other, the skilled person in the art can combine and combine the different embodiments or examples described in the present specification and the features of different embodiments or examples. Although the embodiments of the utility model and its advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made in this paper without departing from the protection scope of the patent application.

Claims

1. A nitrogen oxide sensor calibration test device, characterized by The calibration device comprises: a calibration platform, which is a hollow pipe device, a standard NOx sensor and a probe of a calibrated NOx sensor are inserted into the pipe device and fixed; a gas distribution platform, which is connected to the pipe device and used to deliver a mixed gas of NOx and O2 for calibration to the pipe device; a calibration test control computer, which is connected to the standard NOx sensor and the calibrated NOx sensor, used to read the concentration value of the standard sensor and write the concentration value to the calibrated NOx sensor; a standard gas supply device, which is connected to the pipe device and used to deliver a standard gas for calibrating the standard NOx sensor to the pipe device, the standard gas supply device comprises a plurality of gas cylinders for supplying NOx standard gases with different concentrations respectively, each gas cylinder is respectively provided with a solenoid valve for controlling the output of the gas, and a solenoid valve is arranged on the output channel between the standard gas supply device and the pipe device.

2. The NOx sensor calibration test device of claim 1, wherein, A solenoid valve is arranged on the output channel between the gas distribution platform and the pipe device.

Images