CN111696322A - Composite gas monitoring method and device, computer terminal and readable storage medium - Google Patents

Abstract

The invention discloses a composite gas monitoring method, device, computer terminal and readable storage medium. The method includes: obtaining a detection analog value of a corresponding gas through a gas detection sensor, obtaining an actual measured temperature of a corresponding environment through a temperature sensor, and obtaining a humidity sensor through a humidity sensor. Obtain the measured relative humidity of the corresponding environment; calculate the temperature difference and relative humidity difference respectively according to the measured temperature, measured relative humidity and standard temperature and standard relative humidity under standard working conditions; calibrate the detection according to the temperature difference and relative humidity difference The analog value is obtained to obtain the calibrated analog value; the calibrated analog value is converted into the actual volume concentration value reflecting the concentration of the corresponding gas through the A/D converter. The technical scheme disclosed by the invention takes into account the influence of actual temperature and actual relative humidity on the detection accuracy of the gas detection sensor, and calibrates the detection analog value through a calibration formula to improve the detection accuracy.

Description

Composite gas monitoring method, device, computer terminal and readable storage medium

technical field

The present invention relates to the field of gas monitoring, in particular to a composite gas monitoring method, device, computer terminal and readable storage medium.

Background technique

Gas detection sensors are used as safety tools to detect the lack of certain gases (eg oxygen), to detect the presence of certain hazardous gases (eg flammable or toxic gases) or in traffic safety to detect ethanol concentrations.

At present, when the gas detection sensor is used to detect the corresponding gas in the corresponding environment, the processing method of the corresponding detection data obtained by the detection is not rigorous, and only the data detected by the gas detection sensor itself is processed, ignoring that the detection sensitivity of the gas detection sensor is affected by the surrounding environment. The influence of changes in ambient temperature and relative humidity leads to certain errors in the detection data.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention provides a composite gas monitoring method, device, computer terminal and readable storage medium.

One embodiment of the present invention provides a composite gas monitoring method comprising:

Obtain the detection analog value of the corresponding gas through the gas detection sensor, obtain the measured temperature of the corresponding environment through the temperature sensor, and obtain the measured relative humidity of the corresponding environment through the humidity sensor;

Calculate the temperature difference and the relative humidity difference respectively according to the measured temperature, the measured relative humidity, and the standard temperature and standard relative humidity under standard working conditions;

The detected analog value is calibrated according to the temperature difference value and the relative humidity difference value to obtain a calibrated analog value.

The composite gas monitoring method described in the above scheme also includes:

The calibrated analog value is converted into an actual volume concentration value reflecting the concentration of the corresponding gas by an A/D converter.

Further, the composite gas monitoring method described in the above scheme also includes:

Obtain the position of the corresponding environment, and upload the position and the actual volume concentration value to the monitoring terminal;

When the actual volume concentration value is greater than or equal to the preset alarm threshold value of the corresponding gas, an alarm prompt of the corresponding level is issued according to the preset alarm threshold value.

Further, the above-mentioned gas detection sensor includes at least one of a carbon monoxide detection sensor, a carbon dioxide detection sensor, a smoke detection sensor, a PM2.5 dust detection sensor and an ethanol gas detection sensor.

Further, the composite gas monitoring method described in the above scheme determines the simulated value of the ethanol gas after calibration according to the following calibration formula:

The calibrated analog value=detection analog value+(temperature difference/2℃)*0.098+(relative humidity difference/5%)*0.095.

Another embodiment of the present invention provides a composite gas monitoring device comprising:

The acquisition module is used to obtain the detection analog value of the corresponding gas through the gas detection sensor, obtain the measured temperature of the corresponding environment through the temperature sensor, and obtain the measured relative humidity of the corresponding environment through the humidity sensor;

a calculation module for calculating the temperature difference and the relative humidity difference respectively according to the measured temperature, the measured relative humidity, and the standard temperature and standard relative humidity under standard working conditions;

A calibration module, configured to calibrate the detected analog value according to the temperature difference value and the relative humidity difference value to obtain a calibrated analog value.

The composite gas monitoring device described in the above scheme also includes:

A conversion module, configured to convert the calibrated analog value into an actual volume concentration value reflecting the concentration of the corresponding gas through an A/D converter.

Further, the composite gas monitoring device described in the above scheme also includes:

a monitoring module, used for acquiring the position of the corresponding environment, and uploading the position and the actual volume concentration value to the monitoring terminal;

The alarm module is configured to issue an alarm prompt of a corresponding level according to the preset alarm threshold value when the actual volume concentration value is greater than or equal to the preset alarm threshold value of the corresponding gas.

Yet another embodiment of the present invention provides a computer terminal, the computer terminal includes a memory and a processor, the memory is used for storing a computer program, and the processor executes the computer program to cause the computer terminal to perform the above implementation. The composite gas monitoring method described in the scheme.

Yet another embodiment of the present invention provides a readable storage medium storing a computer program that, when executed on a memory, executes the composite gas monitoring method described in the above embodiments.

The technical scheme of the present invention monitors harmful gases in real time through the gas detection sensor. When processing the data detected by the gas detection sensor, considering that the detection sensitivity of the gas detection sensor is affected by the surrounding temperature and relative humidity, the temperature sensor Obtain the measured temperature of the corresponding environment, obtain the measured relative humidity of the corresponding environment through the humidity sensor, and fuse and calibrate the detection analog value of the corresponding gas obtained through the gas detection sensor with the current measured temperature and measured relative humidity data to obtain accurate reflections Corresponds to the analog value of the gas concentration. Thus, the error caused by the influence of ambient temperature and relative humidity on the detection sensitivity of the gas sensor can be overcome.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be It is regarded as the limitation of the protection scope of the present invention. In the various figures, similar components are numbered similarly.

Fig. 1 shows a kind of schematic flow chart of the composite gas monitoring method of the present invention;

Fig. 2 shows another schematic flow chart of the composite gas monitoring method of the present invention;

3 shows a schematic structural diagram of the composite gas monitoring device of the present invention;

FIG. 4 shows another schematic structural diagram of the composite gas monitoring device of the present invention.

Major component symbols include:

100-composite gas monitoring device; 101-acquisition module; 102-calculation module; 103-calibration module; 104-conversion module; 105-monitoring module; 106-alarm module.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

Hereinafter, the terms "comprising", "having" and their cognates, which may be used in various embodiments of the present invention, are only intended to denote particular features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be construed as first excluding the presence of or adding one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing or the possibility of a combination of the foregoing.

Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of this invention belong. The terms (such as those defined in commonly used dictionaries) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized or overly formal meaning, unless explicitly defined in the various embodiments of the present invention.

Example 1

In daily life, turning on the air conditioner in a closed room for a long time may lead to high indoor carbon monoxide and carbon dioxide concentration and cause poisoning, various traffic accidents caused by drunk driving, or high concentration of smoke or PM2.5 dust in the air. Therefore, the detection of different toxic gases corresponds to different gas detection sensors, such as carbon monoxide detection sensors, carbon dioxide detection sensors, smoke detection sensors, PM2.5 dust detection sensors and ethanol gas detection sensors.

In this embodiment, referring to FIG. 1 , a method of composite gas detection is shown.

As shown in Figure 1, a method for composite gas detection includes the following steps:

Step S10: Obtain the detection analog value of the corresponding gas through the gas detection sensor, obtain the measured temperature of the corresponding environment through the temperature sensor, and obtain the measured relative humidity of the corresponding environment through the humidity sensor.

When the gas detection sensor is used to detect the corresponding gas, the detection analog value of the corresponding gas can be obtained, that is, the analog output terminal of the gas detection sensor will output a voltage value of 0-5V that can reflect the corresponding gas concentration. However, in the practical application of the gas detection sensor, the detection sensitivity of the gas detection sensor will be affected by the ambient temperature and relative humidity, resulting in errors in the acquired detection analog value. Considering the influence of ambient temperature and relative humidity on the gas detection sensor, the measured temperature of the corresponding environment is obtained through the temperature sensor, and the measured relative humidity of the corresponding environment is obtained through the humidity sensor, so as to apply the measured temperature and relative humidity to the subsequent steps.

Step S20: Calculate the temperature difference and the relative humidity difference respectively according to the measured temperature, the measured relative humidity, and the standard temperature and standard relative humidity under standard working conditions.

It can be understood that the temperature difference value=measured temperature-standard temperature, and the relative humidity difference value=measured relative humidity-standard relative humidity. The detection sensitivity of each gas detection sensor is the highest under the corresponding standard working environment, and the standard working environment includes standard temperature and standard relative humidity.

Exemplarily, the standard working conditions of the ethanol detection sensor MQ-3 are: the temperature is 20° C. and the relative humidity is 65%. When the ethanol detection sensor MQ-3 is at an ambient temperature of 20°C and the relative humidity of the environment is 65%, the most accurate analog value that can reflect the ethanol concentration can be obtained by detecting the ethanol concentration in the environment. However, in practical applications, it is not guaranteed that the ethanol detection sensor MQ-3 will always work under standard working conditions. Therefore, it is necessary to use the actual measured temperature and measured relative humidity of the application environment and the standard temperature and standard relative humidity under standard working conditions. The temperature difference value and the relative humidity difference value are respectively calculated, wherein the temperature difference value=measured temperature-standard temperature, and the relative humidity difference=measured relative humidity-standard relative humidity.

Exemplarily, if the actual temperature of the current environment is 40°C and the actual relative humidity is 35%, the standard working conditions of the ethanol detection sensor MQ-3 are: the temperature is 20°C and the relative humidity is 65%, then the temperature difference = 40 ℃-20℃, the relative humidity difference=35%-65%, the corresponding temperature difference is 20℃, and the relative humidity difference is -35%.

The above temperature difference and relative humidity difference are used in subsequent steps to calibrate the analog value detected by the ethanol detection sensor MQ-3.

Step S30: Calibrate the detected analog value according to the temperature difference value and the relative humidity difference value to obtain a calibrated analog value.

Exemplarily, a large number of experiments are performed on the detection value of the ethanol detection sensor MQ-3, and the experimental data are recorded. Through the comparative analysis of the experimental data, it can be known that for every 2°C change in the ambient temperature, the analog output terminal of the ethanol detection sensor MQ-3 The output detection analog value, that is, the voltage value, has an error of 0.098V; or for every 5% change in the relative humidity of the environment, the detection analog value output by the analog output terminal of the ethanol detection sensor MQ-3, that is, the voltage value, exists 0.095 error of V.

Correspondingly, the calibration formula of ethanol gas can be: analog value after calibration=detection analog value+(temperature difference/2℃)*0.098+(relative humidity difference/5%)*0.095, through the above calibration of ethanol gas The formula can calibrate the detection analog value output by the ethanol detection sensor MQ-3, and obtain the calibrated analog value. The calibrated analog value has eliminated the influence of ambient temperature and ambient relative humidity, and can more accurately reflect the actual volume concentration value of ethanol concentration in the environment.

Exemplarily, if the actual temperature of the current environment is 40°C and the actual relative humidity is 35%, the detection analog value output by the analog output terminal of the ethanol detection sensor MQ-3 is 4v, through the above calibration formula: the calibrated analog value = Detected analog value+(temperature difference/2℃)*0.098+(relative humidity difference/5%)*0.095, can determine the calibrated analog value=4+(20℃/2℃)*0.098+(-30 %/5%)*0.095, that is, the calibrated analog value is 4.41v.

Exemplarily, if the actual temperature of the current environment is -10°C and the actual relative humidity is 35%, the detection analog value output by the analog output terminal of the ethanol detection sensor MQ-3 is 4v, through the above calibration formula: the calibrated analog value = Detection analog value + (temperature difference/2°C)*0.098+(relative humidity difference/5%)*0.095, the calibrated analog value can be determined=4+(-30°C/2°C)*0.098+( -30%/5%)*0.095, that is, the calibrated analog value is 1.96v.

The technical solution of this embodiment uses the gas detection sensor to monitor the harmful gas in real time. When processing the data detected by the gas detection sensor, considering that the detection sensitivity of the gas detection sensor is affected by the surrounding temperature and relative humidity, the temperature The sensor obtains the measured temperature of the corresponding environment, and the measured relative humidity of the corresponding environment is obtained through the humidity sensor. An analog value reflecting the corresponding gas concentration. Thus, the error caused by the influence of ambient temperature and relative humidity on the detection sensitivity of the gas sensor can be overcome.

Example 2

In this embodiment, referring to FIG. 2 , it is shown that the composite gas monitoring method further includes step S40 , step S50 and step S60 .

Step S40: Convert the calibrated analog value into an actual volume concentration value reflecting the concentration of the corresponding gas through an A/D converter.

It should be understood that the analog value after calibration publicity needs to be converted into the actual volume concentration reflecting the concentration of the corresponding gas by using an A/D converter according to the relationship between the analog value and the volume concentration of the gas to be measured. value, and then determine the hazard level of harmful gases according to the actual volume concentration value.

Exemplarily, the relationship between the analog output voltage value of the ethanol gas detection sensor MQ-3 and the measured volume concentration value of the ethanol gas has a linear relationship, and the corresponding comparison relationship may be: analog output voltage value=volume concentration value/200+ 1. For example, when the analog output voltage value is 1.5v, the corresponding volume concentration value may be 100ppm; when the analog output voltage value is 3v, the corresponding volume concentration value may be 400ppm.

Step S50: Acquire the position of the corresponding environment, and upload the position and the actual volume concentration value to the monitoring terminal.

By monitoring the actual volume concentration of the corresponding gas at the corresponding position through the monitoring terminal, relevant information can be obtained in real time. On the one hand, the relevant information can be recorded, and the relevant information can be used for comprehensive comparative analysis to realize the prediction of potential safety hazards or regular inspections; on the other hand, when When a hazard occurs, the monitoring terminal can effectively deploy the corresponding control scheme.

Exemplarily, in a large production workshop with hidden dangers of carbon monoxide and carbon dioxide, divide the production workshop into multiple monitoring areas, use carbon monoxide gas detection sensors and carbon dioxide to detect carbon monoxide and carbon dioxide, and upload the detection data corresponding to each area. To the monitoring terminal, the monitoring terminal can comprehensively compare and analyze the detection data to form a relevant detection curve, so as to realize the monitoring terminal's prediction of potential safety hazards or regular investigation.

Exemplarily, for the real-time monitoring of ethanol gas, when it is found that the concentration of ethanol gas in the vehicle exceeds the driving standard, the in-vehicle alarm system is activated, and GPS positioning is performed on the vehicle position. If it is detected that the ethanol concentration exceeds the standard and the motor vehicle is moving through positioning, it will be confirmed as drunk driving. At this time, relevant data information such as vehicle location and ethanol concentration will be transmitted to the monitoring terminal of the background of the transportation department through the GPRS communication network to realize traffic The department can deal with drunk driving immediately to avoid potential safety hazards.

Step S60: when the actual volume concentration value is greater than or equal to the preset alarm threshold value of the corresponding gas, issue an alarm prompt of the corresponding level according to the preset alarm threshold value.

Exemplarily, each harmful gas will produce different levels of hazards in different concentration ranges, and the hazards corresponding to the volume concentrations of various gases are shown in the table below.

Exemplarily, for ethanol gas, the preset alarm threshold of the volume concentration value D may be: when 1ppm≤D<200ppm, execute the first-level alarm; when 200ppm≤D<800ppm, execute the second-level alarm; when D≥800ppm , execute the three-level alarm.

Further, the above-mentioned first-level alarm can remind drivers to pay attention to safe driving through text information without uploading to the monitoring terminal in the background of the traffic department; the above-mentioned second-level alarm can be an in-vehicle voice alarm, and the alarm information is uploaded to the monitoring terminal in the background of the traffic department. , the monitoring terminal determines whether the driver is drinking and driving through GPS; the above-mentioned three-level alarm can be a buzzer alarm in the car, and the alarm information is uploaded to the monitoring terminal in the background of the traffic department, and the monitoring terminal uses GPS to determine whether the driver is drunk driving.

Example 3

In this embodiment, referring to FIG. 3 , it is shown that the composite gas monitoring device 100 includes: an acquisition module 101 , a calculation module 102 , a calibration module 103 and a conversion module 104 .

Wherein, the obtaining module 101 is configured to obtain the detected analog value of the corresponding gas through the gas detection sensor, obtain the measured temperature of the corresponding environment through the temperature sensor, and obtain the measured relative humidity of the corresponding environment through the humidity sensor.

The calculation module 102 is used to calculate the temperature difference value and the relative humidity difference value respectively according to the measured temperature, the measured relative humidity and the standard temperature and standard relative humidity under standard working conditions, and the temperature difference value=measured temperature− Standard temperature, the relative humidity difference = measured relative humidity - standard relative humidity.

The calibration module 103 is configured to calibrate the detected analog value according to the temperature difference value and the relative humidity difference value to obtain a calibrated analog value.

It should be understood that the technical solution of this embodiment is used to implement the composite gas monitoring method described in Embodiment 1 through the synergistic effect of the above-mentioned various functional modules, and the embodiments and beneficial effects involved in Embodiment 1 are the same in this embodiment. It is applicable and will not be repeated here.

Example 4

In this embodiment, referring to FIG. 4 , it is shown that the composite gas monitoring device 100 further includes: a conversion module 104 , a monitoring module 105 and an alarm module 106 .

The conversion module 104 is configured to convert the calibrated analog value into an actual volume concentration value reflecting the concentration of the corresponding gas through an A/D converter.

The monitoring module 105 is configured to acquire the position of the corresponding environment, and upload the position and the actual volume concentration value to the monitoring terminal.

The alarm module 106 is configured to issue an alarm prompt of a corresponding level according to the preset alarm threshold when the actual volume concentration value is greater than or equal to the preset alarm threshold of the corresponding gas.

It should be understood that the conversion module 104, the monitoring module 105, and the alarm module 106 disclosed in the technical solution of this embodiment work in cooperation with the various functional modules disclosed in the above-mentioned embodiment 3, and are used to execute the composite gas monitoring method described in the above-mentioned embodiment 2. The implementation and beneficial effects involved in Embodiment 2 are also applicable in this embodiment, and will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may also be implemented in other manners. The apparatus embodiments described above are only schematic, for example, the flowcharts and structural diagrams in the accompanying drawings show possible implementation architectures and functions of apparatuses, methods and computer program products according to various embodiments of the present invention and operation. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code that contains one or more functions for implementing the specified logical function(s) executable instructions. It should also be noted that, in alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It is also noted that each block of the block diagrams and/or flow diagrams, and combinations of blocks in the block diagrams and/or flow diagrams, can be implemented using dedicated hardware-based systems that perform the specified functions or actions. be implemented, or may be implemented in a combination of special purpose hardware and computer instructions.

In addition, each functional module or unit in each embodiment of the present invention may be integrated to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.

If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention can be embodied in the form of a software product in essence, or the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention. should be included within the protection scope of the present invention.

Claims (10)

1. A composite gas monitoring method, comprising:

acquiring a detection analog value of corresponding gas through a gas detection sensor, acquiring an actual measurement temperature of a corresponding environment through a temperature sensor, and acquiring an actual measurement relative humidity of the corresponding environment through a humidity sensor;

respectively calculating a temperature difference value and a relative humidity difference value according to the measured temperature, the measured relative humidity and a standard temperature and a standard relative humidity under a standard working condition;

and calibrating the detection analog value according to the temperature difference value and the relative humidity difference value to obtain a calibrated analog value.

2. The composite gas monitoring method of claim 1, further comprising:

converting the calibrated analog value into an actual volume concentration value reflecting the concentration of the corresponding gas by an A/D converter.

3. The composite gas monitoring method of claim 2, further comprising:

acquiring the position of the corresponding environment, and uploading the position and the actual volume concentration value to a monitoring end;

and when the actual volume concentration value is greater than or equal to a preset alarm threshold value of the corresponding gas, sending an alarm prompt of a corresponding grade according to the preset alarm threshold value.

4. The composite gas monitoring method as defined in claim 1, wherein the gas detection sensor comprises at least one of a carbon monoxide detection sensor, a carbon dioxide detection sensor, a smoke detection sensor, a PM2.5 dust detection sensor, and an ethanol gas detection sensor.

5. The composite gas monitoring method of claim 4, wherein the ethanol gas calibrated analog value is determined according to the following calibration formula:

the calibrated analog value ═ detection analog value + (difference in temperature/2 ℃) 0.098+ (difference in relative humidity/5%). 0.095.

6. A composite gas monitoring device, the device comprising:

the acquisition module is used for acquiring a detection analog value of corresponding gas through a gas detection sensor, acquiring the actual measurement temperature of the corresponding environment through a temperature sensor, and acquiring the actual measurement relative humidity of the corresponding environment through a humidity sensor;

the calculation module is used for respectively calculating a temperature difference value and a relative humidity difference value according to the measured temperature, the measured relative humidity and the standard temperature and the standard relative humidity under the standard working condition;

and the calibration module is used for calibrating the detection analog value according to the temperature difference value and the relative humidity difference value so as to obtain a calibrated analog value.

7. The composite gas monitoring device of claim 6, further comprising:

a conversion module for converting the calibrated analog value into an actual volume concentration value reflecting the concentration of the corresponding gas through an A/D converter.

8. The composite gas monitoring device of claim 6, further comprising:

the monitoring module is used for acquiring the position of the corresponding environment and uploading the position and the actual volume concentration value to a monitoring end;

and the alarm module is used for sending an alarm prompt of a corresponding grade according to a preset alarm threshold when the actual volume concentration value is greater than or equal to the preset alarm threshold of the corresponding gas.

9. A computer terminal, characterized in that the computer terminal comprises a memory for storing a computer program and a processor for executing the computer program to cause the computer terminal to perform the composite gas monitoring method according to any one of claims 1 to 5.

10. A readable storage medium, characterized in that it stores a computer program which, when run on a memory, performs the composite gas monitoring method of any one of claims 1 to 5.

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