CN111624302A - Automatic calibration method, gas detection device, terminal and readable storage medium - Google Patents
Automatic calibration method, gas detection device, terminal and readable storage medium Download PDFInfo
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- 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
- G01N33/0006—Calibrating gas analysers
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Abstract
The invention provides an automatic calibration method, a gas detection device, a terminal and a readable storage medium, wherein the automatic calibration method comprises the following steps: step 1, presetting calibration parameter values: a calibration value C, a floating threshold value FT and comparison times CN; step 2, obtaining a current value; step 3, judging whether the previous current value CV and the next current value NV meet | NV-CV | < = FT or not, if so, counting one time of successful comparison, and executing the next step; if not, continuing to execute the step 3; step 4, judging whether the continuous comparison success times exceed the comparison times CN, if so, executing the next step; if not, returning to execute the step 3; and 5, recording the current value of the last time as a calibration target value corresponding to the calibration value C. The invention can realize automatic calibration of gas detection devices with different gases and different calibration values by adjusting 7 parameters.
Description
Technical Field
The invention belongs to the field of gas detection, and particularly relates to an automatic calibration method, a gas detection device, a terminal and a readable storage medium.
Background
With the increase of safety accidents in various chemical plants and other industrial occasions, the accuracy of the safety detection device is also the focus of attention of people. Among many safety accidents, safety accidents caused by gas explosion and leakage account for a considerable proportion. How to accurately detect the occurrence of a danger by a gas detection device becomes a main research object for avoiding such accidents. The gas detection device mainly depends on each gas sensor and the calibration curve of the gas detection device to perform gas detection and alarm, so that the accuracy of the calibration curve is closely related to the accuracy of the gas detection device. However, due to various reasons, the calibration value of the calibration curve has a large difference from the actual value, such as differences in operation procedures, speed, subjective judgment and the like of personnel, slow climbing of part of special gas is serious, and people who jump up and down cannot visually judge the special gas. How to avoid the influence of these factors becomes a major key point of the gas detection device.
Disclosure of Invention
In order to solve the above problems, it is necessary to provide an automatic calibration method, a gas detection apparatus, a terminal, and a readable storage medium.
The invention provides an automatic calibration method in a first aspect, which comprises the following steps:
step 1, presetting calibration parameter values: a calibration value C, a floating threshold value FT and comparison times CN;
step 2, obtaining a current value;
step 3, judging whether the previous current value CV and the next current value NV meet | NV-CV | < = FT or not, if so, counting one time of successful comparison, and executing the next step; if not, continuing to execute the step 2;
step 4, judging whether the continuous comparison success times exceed the comparison times CN, if so, executing the next step; if not, returning to execute the step 2;
and 5, recording the current value of the last time as a calibration target value corresponding to the calibration value C.
Based on the above, in step 1, the preset calibration parameter value further includes a time difference value Tn; in step 2, after the current value is obtained, judging whether the difference value between the current time and the time of obtaining the current value last time is equal to Tn, if so, obtaining the next current value NV; if not, continuously judging whether the time difference value is equal to Tn or not.
Based on the above, in step 1, the preset calibration parameter value further includes an upper limit CT of the calibration target valuemaxLower limit CT of calibration target valuemin(ii) a In step 2, when any current value is obtained, whether the current value meets CV or not is judged firstly>=CTminOr CV<=CTmaxIf yes, executing the next operation; if not, discarding all current values acquired before, and acquiring the current value CV again.
Based on the above, in step 1, the preset calibration parameter value further includes calibration timeout Tout(ii) a In step 2, before obtaining the current value CV, judging whether the total calibration time length from the time of obtaining the first current value to the current time is greater than ToutIf yes, the automatic calibration is finished; if not, acquiring the next current value CV.
In a second aspect of the present invention, a gas detection device is provided, and when a designated calibration value is calibrated, the gas detection device is placed in an environment of a gas to be calibrated, and the automatic calibration method is executed.
The third aspect of the present invention provides an automatic calibration terminal, which includes a memory, a processor, and a program stored in the memory and capable of being executed on the processor, wherein the processor implements the automatic calibration method when executing the program.
A fourth aspect of the present invention provides a readable storage medium, having stored thereon instructions, which when executed by a processor, implement the automatic calibration method.
Compared with the prior art, the method has outstanding substantive characteristics and remarkable progress, and concretely, the method is characterized in that the calibration value C and the calibration target value upper limit CT are subjected tomaxLower limit CT of calibration target valueminThe automatic calibration of the designated calibration value can be realized only by arranging the gas detection device in a calibration gas environment and sending a starting command without the operation and judgment of personnel.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
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The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a flow chart of the automatic calibration method of the present invention.
FIG. 2 is an implementation of automatic calibration of the gas detection device of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Example 1
As shown in fig. 1, an automatic calibration method includes:
step 1, presetting calibration parameter values: calibration value C, floating threshold value FT, time difference value Tn, comparison times CN and calibration target value upper limit CTmaxLower limit CT of calibration target valueminAnd calibrating the timeout Tout(ii) a It should be noted that the values of the calibration parameters have an influence on each other, depending on the desired calibrationDetermining the precision, wherein when the precision is preset, the calibration parameter value can be set to be a larger value or set to be zero so as to cancel the limitation of the corresponding parameter;
and (3) calibration value C: a concentration value to be calibrated for the gas detection device;
calibrating target value upper limit CTmaxLower limit CT of calibration target valuemin: in the calibration curve, each calibration value and a calibration target value are in one-to-one correspondence relationship. Calibrating target value upper limit CTmaxLower limit CT of calibration target valueminNamely the upper and lower critical values of the corresponding calibration target value theory. The parameters are typically determined by the sensor characteristics and corresponding hardware circuitry;
floating threshold FT: in the calibration method, the floating threshold is used for judging whether the current obtained value is stable. This parameter is typically determined by the sensor characteristics and the desired calibration accuracy;
the time difference Tn: the calibration parameter is used for comparing the current obtained value with the last obtained value at intervals. This parameter is typically determined by the sensor characteristics and the desired calibration accuracy;
the comparison times CN: when the current acquired value CV and the next acquired value NV are within the floating threshold, the number of times of continuous comparison is determined by the parameters. This parameter is typically determined by the sensor characteristics and the desired calibration accuracy;
calibration timeout Tout: and when the total calibration time exceeds the calibration timeout time, exiting the program. The parameters need to comprehensively consider the overall calibration time, and the parameters have certain influence on the calibration time. According to the calibration parameter value selected in the embodiment, influence factors such as hardware characteristics, sensor characteristics, target gas and calibration precision are fully considered, and an automatic calibration mode is adopted, so that the problems that the difference of operation procedures and speed of personnel, subjective judgment and the like is large, and the difference between a calibration value and an actual value is large due to the fact that part of special gas slowly climbs seriously and cannot be visually judged due to vertical jumping are solved.
Step 2, obtaining a current value CV, and firstly judging whether the current value CV meets the CV or not>=CTminOr CV<=CTmaxIf yes, executing the next operation; if not, executing step 4.
Step 3, judging whether the difference value between the current time and the time for obtaining the current value last time is equal to Tn, if yes, executing step 5; if not, executing step 3.
Step 4, judging whether the total calibration time length from the time of obtaining the first current value to the current time is greater than ToutIf yes, executing step 9; if not, executing step 2.
Step 5, obtaining the next current value NV, and judging whether the current value NV meets the NV>=CTminOr NV<=CTmax. If yes, executing step 6; if not, executing step 4.
Step 6, judging whether the previous current value CV and the next current value NV meet | NV-CV | < = FT or not, if so, counting one time of successful comparison, and executing the next step; if not, continuing to execute the step 4.
Step 7, judging whether the continuous comparison success times exceed the comparison times CN, if so, executing the next step; if not, returning to execute the step 3.
And 8, recording the current value of the last time as a calibration target value corresponding to the calibration value C.
And 9, finishing automatic calibration.
It should be noted that, different calibration parameter values are set, automatic calibration is performed to obtain calibration target values corresponding to different calibration values, and a calibration curve can be formed according to different calibration values and calibration target values.
Example 2
As shown in fig. 2, the embodiment provides a gas detection apparatus, and when a specified calibration value is calibrated, the gas detection apparatus is placed in an environment of a gas to be calibrated, and the automatic calibration method is executed, so that automatic calibration of the specified calibration value can be realized without operation and judgment of a person. In this embodiment, after determining each calibration parameter according to the hardware characteristics, the sensor characteristics, the target gas, the calibration accuracy, and the like of the gas detection device, automatic calibration of gas detection devices of different gases and different calibration values can be realized.
Example 3
The embodiment provides an automatic calibration terminal, which comprises a memory, a processor and a program stored on the memory and capable of running on the processor, wherein the processor implements the steps of the automatic calibration method when executing the program.
Example 4
The present embodiments provide a readable storage medium having stored thereon instructions that, when executed by a processor, perform the steps of the automatic calibration method.
The present embodiment provides a program product, which when running on a terminal device, causes the terminal device to implement the steps of the automatic calibration method in the foregoing embodiments when executed.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal and method may be implemented in other ways.
The automatic calibration method can be stored in a readable storage medium if the automatic calibration method is realized in the form of a software functional unit and sold or used as an independent product. Based on such understanding, all or part of the flow in the method of the embodiments described above may be implemented by a program, which may be stored in a readable storage medium and when executed by a processor, may implement the steps of the embodiments of the methods described above. The program includes program code, and the program code may be in a source code form, an object code form, an executable file or some intermediate form.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (7)
1. An automatic calibration method is characterized by comprising the following steps:
step 1, presetting calibration parameter values: a calibration value C, a floating threshold value FT and comparison times CN;
step 2, obtaining a current value;
step 3, judging whether the previous current value CV and the next current value NV meet | NV-CV | < = FT or not, if so, counting one time of successful comparison, and executing the next step; if not, continuing to execute the step 2;
step 4, judging whether the continuous comparison success times exceed the comparison times CN, if so, executing the next step; if not, returning to execute the step 2;
and 5, recording the current value of the last time as a calibration target value corresponding to the calibration value C.
2. The automatic calibration method according to claim 1, wherein: in the step 1, the preset calibration parameter value further comprises a time difference Tn;
in step 2, after the current value is obtained, judging whether the difference value between the current time and the time of obtaining the current value last time is equal to Tn, if so, obtaining the next current value NV; if not, continuously judging whether the time difference value is equal to Tn or not.
3. The automatic calibration method according to claim 1, wherein: in step 1, the preset calibration parameter values are also packagedIncluding the upper limit of the calibrated target value CTmaxLower limit CT of calibration target valuemin；
In step 2, when any current value is obtained, whether the current value meets CV or not is judged firstly>=CTminOr CV<=CTmaxIf yes, executing the next operation; if not, discarding all current values acquired before, and acquiring the current value CV again.
4. The automatic calibration method according to claim 1, wherein: in step 1, the preset calibration parameter value further includes calibration timeout Tout；
In step 2, before obtaining the current value CV, judging whether the total calibration time length from the time of obtaining the first current value to the current time is greater than ToutIf yes, the automatic calibration is finished; if not, acquiring the next current value CV.
5. A gas detection device, characterized in that: when calibrating the designated calibration value, the gas detection device is placed in the environment of the gas to be calibrated, and the automatic calibration method of claims 1-4 is executed.
6. An automatic calibration terminal comprising a memory, a processor, and a program stored on the memory and executable on the processor, characterized in that: the processor, when executing the program, implements the automatic calibration method of claims 1-4.
7. A readable storage medium having stored thereon instructions, wherein the instructions, when executed by a processor, implement the automatic calibration method of claims 1-4.
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| CN112415141A (en) * | 2020-11-06 | 2021-02-26 | 珠海格力电器股份有限公司 | Compensation method and compensation device for formaldehyde measurement concentration display value |
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