An automatic data acquisition system for calibrating gas detectors

Abstract

The present invention relates to the technical field of gas detectors, and specifically to an automatic data acquisition system for calibrating gas detectors, and the steps are as follows: S1, component assembly; S2, test sample preparation; S3, test sample placement: placing the test sample inside the sample chamber, and before placement, running the cleaning fan to clean the inside of the sample chamber; S4, data acquisition; S5, data analysis; S6, unqualified problem handling: judging the problem of the gas detector based on the comparison result, and analyzing, handling and debugging the problem of the gas detector. The present invention generates jpg images from the collected data, and integrates the data collected multiple times into a document table for calibration. After the last set of sample data is collected, the sample chamber is cleaned by a cleaning fan to improve the accuracy of subsequent detection, and the detection problem and the direction of problem handling are proposed for unqualified gas detectors, and the details of the problem are analyzed and recorded. The gas detector after processing is calibrated again.

Description

Technical Field

[0001] The invention relates to the technical field of gas detectors, in particular to an automatic data acquisition system for calibrating gas detectors. Background Art

[0002] A gas detector is an instrument tool for detecting gas leakage concentration, including: portable gas detector, handheld gas detector, fixed gas detector, online gas detector, etc. It mainly uses gas sensors to detect the types of gases present in the environment. Gas sensors are sensors used to detect the composition and content of gases. The accuracy of gas detector detection needs to be calibrated before use. The calibration process requires the calibration device body to detect the same gas as the gas detector to produce a comparative experiment, in which the data is used to calibrate the detection data.

[0003] However, the system information collection for calibrating gas detectors on the market is relatively messy, and detailed collection data cannot be automatically generated, which is not conducive to the accuracy of the calibration operation. After the last set of sample data is collected, the detection chamber is not cleaned, resulting in inaccurate detection. There is no processing flow for unqualified gas detectors, and unqualified gas detectors are directly scrapped, resulting in increased costs. Problems cannot be collected, which is not conducive to the production optimization of gas detectors. Therefore, those skilled in the art provide an automatic data collection system for calibrating gas detectors to solve the problems raised in the above background technology. Summary of the invention

[0004] The object of the present invention is to provide an automatic data acquisition system for calibrating a gas detector to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: an automatic data acquisition system for calibrating a gas detector, comprising a sample chamber, an exhaust port, a cleaning fan, a test sample, a gas detector, a calibrated gas detector and an information processor for the calibrated gas detector, wherein the automatic data acquisition method comprises the following steps:

[0006] S1. Component assembly: The gas detector and the calibration gas detector are installed and connected, the detection ends of the gas detector and the calibration gas detector are connected to the same sample chamber, and the data output ends of the gas detector and the calibration gas detector are connected to the calibration gas detector information processor;

[0007] S2. Test sample preparation:

[0008] (1) Take out ethanol and water and mix them in a certain ratio;

[0009] (2) Stirring the mixed solvent in a rotating drum, wherein the drum can switch between forward and reverse rotations during the stirring process;

[0010] (3) The prepared solvent was placed in a constant temperature box for 12 hours at a constant temperature of 24°C;

[0011] S3. Place the test sample: Place the test sample into the sample chamber. Before placement, the cleaning fan is operated to clean the inside of the sample chamber. The waste gas generated during the cleaning process is discharged through the exhaust port.

[0012] S4, data acquisition: the gas detector and the calibration gas detector run simultaneously, detect the gas, and transmit the detection information to the calibration gas detector information processor;

[0013] S5. Data analysis: Compare and analyze the data detected by the calibrated gas detector with the information detected by the gas detector. If the information detected by the gas detector is similar to the data detected by the calibrated gas detector, it will be displayed as a successful match and judged as qualified. The detection information will be saved in the database. Otherwise, it will be displayed as a failed match and judged as unqualified.

[0014] S6. Handling of unqualified problems: Based on the comparison results, determine the problems of the gas detector, analyze, handle and debug the problems of the gas detector, record the causes of the problems, and propose gas detector production optimization methods. Connect the debugged gas detector to the sample chamber, conduct the comparison experiment again, and repeat the steps of S5.

[0015] As a further solution of the present invention: in S1, the output ends of the gas detector and the calibrated gas detector are respectively electrically connected to the input end of the gas detector information processor, and the gas detector and the gas detector information processor are connected by means of a plug interface to ensure that the gas detector and the gas detector information processor can be quickly separated.

[0016] As a further solution of the present invention: in S2, there are two groups of test samples, the ratio of ethanol to water in the first group of test samples is 1:1000, and the ratio of ethanol to water in the second group of test samples is 2:1000.

[0017] As a further solution of the present invention: in S2, the drum rotates for 3 minutes after switching between forward and reverse rotations for 1 minute, and switches between forward and reverse rotations twice, taking 15 minutes.

[0018] As a further solution of the present invention: in S3, the sample is placed twice, the sample placement time is 3 minutes, and the cleaning fan runs for no less than 1 minute after being taken out. The test is carried out in a sterile room, and the air introduced into the sample chamber is clean air to ensure the accuracy of gas detection.

[0019] As a further solution of the present invention: in said S4, after the data generated by the detection is processed, the detected data will be recorded in a timely manner and saved in the format of a jpg picture as the original data for generating a detection report later.

[0020] As a further solution of the present invention: in S5, the information detected by the gas detector and the data detected by the calibrated gas detector differ by 0.05ppa, 0.04ppa, 0.03ppa, 0.02ppa, 0.01ppa, 0.00ppa, -0.01ppa, -0.02ppa, -0.03ppa, -0.04ppa, and -0.05ppa, and all are displayed as successful matches.

[0021] As a further solution of the present invention: in S5, the information detected by the gas detector and the data detected by the calibrated gas detector are both shown as matching failures if they are greater than 0.005ppa or less than -0.05ppa.

[0022] As a further solution of the present invention: in S5, the data collected multiple times are transmitted to the processing system of the information processor of the calibrated gas detector, and the comparison data are summarized by identifying and comparing the stored image data, and the information is summarized into a text table, and the qualified and unqualified samples are distinguished through a screening program.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention generates jpg images from the collected data and integrates the data collected multiple times into a document table for calibration, which is beneficial to the accuracy of data collection and automatically completes the collection of information. After the last set of sample data is collected, the sample chamber is cleaned by a cleaning fan to improve the accuracy of subsequent detection. For unqualified gas detectors, detection problems and directions for solving problems are proposed, and the details of the problems are analyzed and recorded. The gas detectors after processing are calibrated again to avoid the problem of directly scrapping unqualified gas detectors and increasing costs, which is beneficial to the production optimization of gas detectors. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an automatic data acquisition system for calibrating a gas detector;

[0025] Figure 2 A flow chart for preparing test samples in an automatic data acquisition system for calibrating a gas detector;

[0026] Figure 3 The present invention is a processing flow chart of a gas detector information processor in an automatic data acquisition system for calibrating gas detectors. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] See also Figures 1 to 3 In an embodiment of the present invention, a data automatic acquisition system for calibrating a gas detector includes a sample chamber, an exhaust port, a cleaning fan, a test sample, a gas detector, a calibrated gas detector, and a calibrated gas detector information processor. The data automatic acquisition method thereof is as follows:

[0029] S1. Component assembly: The gas detector and the calibration gas detector are installed and connected, the detection ends of the gas detector and the calibration gas detector are connected to the same sample chamber, and the data output ends of the gas detector and the calibration gas detector are connected to the calibration gas detector information processor. The output ends of the gas detector and the calibration gas detector are electrically connected to the input end of the gas detector information processor respectively. The gas detector and the gas detector information processor are connected by means of a plug-in interface to ensure that the gas detector and the gas detector information processor can be quickly separated;

[0030] S2. Test sample preparation:

[0031] (1) Take out ethanol and water, mix them in a certain ratio, and there are two groups of test samples. The ratio of ethanol to water in the first group of test samples is 1:1000, and the ratio of ethanol to water in the second group of test samples is 2:1000;

[0032] (2) Stirring the mixed solvent in a rotating drum. During the stirring process, the drum can switch between forward and reverse rotations. After switching between forward and reverse rotations, the drum rotates for 3 minutes, switches between forward and reverse rotations twice, and takes 15 minutes.

[0033] (3) The prepared solvent was placed in a constant temperature box for 12 hours at a constant temperature of 24°C;

[0034] S3. Place the test sample: Place the test sample inside the sample chamber. Before placing the sample, run the cleaning fan to clean the inside of the sample chamber. Exhaust gas generated during the cleaning process is discharged through the exhaust port. Place the sample twice. The sample placement time is 3 minutes. After taking it out, run the cleaning fan for no less than 1 minute. The test is carried out in a sterile room. The air introduced into the sample chamber is clean air to ensure the accuracy of gas detection.

[0035] S4, data acquisition: The gas detector and the calibration gas detector are operated simultaneously. For gas detection, the detection information is transmitted to the calibration gas detector information processor. After the data generated by the detection is processed, the detection data will be recorded in a timely manner and saved in the format of jpg images as the original data for generating the detection report later;

[0036] S5. Data analysis: Compare and analyze the data detected by the calibrated gas detector with the information detected by the gas detector. If the information detected by the gas detector is similar to the data detected by the calibrated gas detector, it will be displayed as a successful match and judged as qualified. The detection information will be saved to the database. Otherwise, it will be displayed as a failed match and judged as unqualified. The information detected by the gas detector differs from the data detected by the calibrated gas detector by 0.05ppa, 0.04ppa, 0.03ppa, 0.02ppa, 0.01ppa, 0.00ppa, -0.01 ppa, -0.02ppa, -0.03ppa, -0.04ppa, -0.05ppa are all displayed as successful matches. The information detected by the gas detector and the data detected by the calibrated gas detector are >0.005ppa or <-0.05ppa are all displayed as failed matches. The data collected multiple times are transmitted to the processing system of the calibrated gas detector information processor. The comparison data is summarized by identifying and comparing the saved image data, and the information is summarized into a text table. The qualified and unqualified samples are distinguished through the screening program;

[0037] S6. Handling of unqualified problems: Based on the comparison results, determine the problems of the gas detector, analyze, handle and debug the problems of the gas detector, record the causes of the problems, and propose gas detector production optimization methods. Connect the debugged gas detector to the sample chamber, conduct the comparison experiment again, and repeat the steps of S5.

[0038] The data of this example are shown in Table 1

[0039] If the information detected by the gas detector differs from the data detected by the calibrated gas detector by 0.05ppa, 0.04ppa, 0.03ppa, 0.02ppa, 0.01ppa, 0.00ppa, -0.01ppa, -0.02ppa, -0.03ppa, -0.04ppa, or -0.05ppa, it will be displayed as a successful match. If the information detected by the gas detector differs from the data detected by the calibrated gas detector by >0.005ppa or <-0.05ppa, it will be displayed as a failed match.

[0040] There are two groups of test samples. The ratio of ethanol to water in the first group of test samples is 1:1000, and the ratio of ethanol to water in the second group of test samples is 2:1000.

[0041] Table 1 Data information table of different test samples and different gas detectors

[0042] Test samples The first gas detector Second gas detector Calibration of gas detectors The first set of test samples 43.01ppa 43.02ppa 43ppa The second set of test samples 59.02ppa 59.01ppa 59ppa

[0043] It can be seen from Table 1 that the test accuracy deviations of the first gas detector, the second gas detector and the calibrated gas detector are within 0.05ppa, 0.04ppa, 0.03ppa, 0.02ppa, 0.01ppa, 0.00ppa, -0.01ppa, -0.02ppa, -0.03ppa, -0.04ppa and -0.05ppa. Therefore, the first gas detector and the second gas detector are both judged to be qualified.

[0044] The comparison between this embodiment and the calibrated gas detector on the market is shown in Table 2

[0045] The specific comparison is the range, resolution, accuracy and corresponding time. The range is the concentration range of the measured gas, the resolution is the resolution accuracy of the measured gas, the accuracy is the test deviation, and the corresponding time is the data collection time.

[0046] Table 2 Comparison table with calibrated gas detectors on the market

[0047] Calibration of gas detectors Range Resolution Accuracy Corresponding time Example 1 0-5000ppm 0.7ppm 1.7% FS 20.25S Example 2 0-7000ppm 0.5ppm 1.5% FS 14.10S Example 3 0-10000ppm 0.3ppm 1% FS 10.02S This embodiment 0-10000ppm 0.05ppm 0.5% FS 7.28S

[0048] It can be seen from Table 2 that the range of this embodiment is better than that of Example 1 and Example 2, and is the same as Example 3; the resolution is better than that of Example 1, Example 2 and Example 3; the accuracy is better than that of Example 1, Example 2 and Example 3; the response time is better than that of Example 1, Example 2 and Example 3; therefore, this embodiment is generally better than that of Example 1, Example 2 and Example 3.

[0049] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0050] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic data acquisition system for calibrating a gas detector, comprising a sample chamber, an exhaust port, a cleaning fan, a test sample, a gas detector, a calibrated gas detector and a calibrated gas detector information processor, wherein the automatic data acquisition method comprises the following steps: S1. Component assembly: The gas detector and the calibration gas detector are installed and connected, the detection ends of the gas detector and the calibration gas detector are connected to the same sample chamber, and the data output ends of the gas detector and the calibration gas detector are connected to the calibration gas detector information processor. The output ends of the gas detector and the calibration gas detector are electrically connected to the input end of the gas detector information processor respectively. The gas detector and the gas detector information processor are connected by means of a plug-in interface to ensure that the gas detector and the gas detector information processor can be quickly separated; S2. Test sample preparation: (1) Take out ethanol and water and mix them in a certain ratio; (2) Stirring the mixed solvent in a rotating drum, wherein the drum can switch between forward and reverse rotations during the stirring process; (3) The prepared solvent was placed in a constant temperature box for 12 hours at a constant temperature of 24°C; There are two groups of test samples. The ratio of ethanol to water in the first group of test samples is 1:1000, and the ratio of ethanol to water in the second group of test samples is 2:1000. The drum is switched between forward and reverse rotations for 1 minute, rotates for 3 minutes, and switches forward and reverse rotations twice, taking 15 minutes. S3. Place the test sample: Place the test sample inside the sample chamber. Before placing the sample, run the cleaning fan to clean the inside of the sample chamber. Exhaust gas generated during the cleaning process is discharged through the exhaust port. Place the sample twice. The sample placement time is 3 minutes. After taking it out, run the cleaning fan for no less than 1 minute. The test is carried out in a sterile room. The air introduced into the sample chamber is clean air to ensure the accuracy of gas detection. S4, data acquisition: The gas detector and the calibration gas detector are operated simultaneously. For gas detection, the detection information is transmitted to the calibration gas detector information processor. After the data generated by the detection is processed, the detection data will be recorded in a timely manner and saved in the format of jpg images as the original data for generating the detection report later; S5. Data analysis: Compare and analyze the data detected by the calibrated gas detector with the information detected by the gas detector. If the information detected by the gas detector is similar to the data detected by the calibrated gas detector, it will be displayed as a successful match and judged as qualified. The detection information will be saved to the database. Otherwise, it will be displayed as a failed match and judged as unqualified. The information detected by the gas detector differs from the data detected by the calibrated gas detector by 0.05ppa, 0.04ppa, 0.03ppa, 0.02ppa, 0.01ppa, 0.00ppa, -0.01 ppa, -0.02ppa, -0.03ppa, -0.04ppa, -0.05ppa are all displayed as successful matches. The information detected by the gas detector and the data detected by the calibrated gas detector are >0.005ppa or <-0.05ppa are all displayed as failed matches. The data collected multiple times are transmitted to the processing system of the calibrated gas detector information processor. The comparison data is summarized by identifying and comparing the saved image data, and the information is summarized into a text table. The qualified and unqualified samples are distinguished through the screening program; S6. Handling of unqualified problems: Based on the comparison results, determine the problems of the gas detector, analyze, handle and debug the problems of the gas detector, record the causes of the problems, and propose gas detector production optimization methods. Connect the debugged gas detector to the sample chamber, conduct the comparison experiment again, and repeat the steps of S5.

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