CN111537692B - Correction method and device for signal lag of gas alarm caused by oil stain hole blockage - Google Patents
Correction method and device for signal lag of gas alarm caused by oil stain hole blockage Download PDFInfo
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- CN111537692B CN111537692B CN202010378135.7A CN202010378135A CN111537692B CN 111537692 B CN111537692 B CN 111537692B CN 202010378135 A CN202010378135 A CN 202010378135A CN 111537692 B CN111537692 B CN 111537692B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/22—Fuels, explosives
- G01N33/225—Gaseous fuels, e.g. natural gas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- 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
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method, e.g. intermittent, or the display, e.g. digital using a threshold to release an alarm or displaying means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/12—Alarms for ensuring the safety of persons responsive to undesired emission of substances, e.g. pollution alarms
- G08B21/16—Combustible gas alarms
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B29/00—Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation
- G08B29/18—Prevention or correction of operating errors
- G08B29/185—Signal analysis techniques for reducing or preventing false alarms or for enhancing the reliability of the system
Abstract
The invention relates to a method and a device for correcting signal lag of a gas alarm caused by oil stain hole blockage. When the breathing orifice of the gas alarm is blocked, the concentration value detected by the sensor is corrected by the scheme, so that the phenomenon of false alarm or failure in reporting caused by detection errors is avoided, the breathing orifice is not required to be maintained or replaced due to partial blocking, the cost is saved, and the problem of lagging alarm signals is solved.
Description
Technical Field
The invention relates to the technical field of data correction, in particular to a correction method and a correction device for signal lag of a gas alarm caused by oil stain hole blockage.
Background
When natural gas leaks, the natural gas reaches the gas sensor component through the breathing hole of the natural gas alarm in a natural diffusion mode. However, since the kitchen is used for cooking for a long time, a large amount of oil smoke is generated, and some oil smoke can be attached to the gas alarm to form oil stains to block the breathing holes, so that the alarm signal is delayed. Under severe conditions, oil smoke can diffuse into the gas alarm and attach to a gas sensor component to block alarm signals, so that the gas alarm is in a failure state and the phenomenon of 'report failure to be reported' occurs.
The oil stain blocking is a long-term accumulated process, when the breathing hole is slightly blocked, the cost for maintaining or replacing the alarm is too high, but the situation of lagging alarm signals can be generated at the moment, so that the problem of lagging alarm signals is necessary to be solved under the situation of not maintaining or replacing the alarm when the breathing hole is slightly blocked.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a correction method and a correction device for the signal lag of a gas alarm caused by oil stain blocking of a hole, and solves the problem of the alarm signal lag caused by oil stain blocking of the gas alarm.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
the correction method for the signal lag of the gas alarm caused by oil pollution hole blockage comprises the following steps:
step S1: establishing a difference model F (x) of detection concentration values of the gas alarm under different blockage degrees of a breathing orifice of the gas alarm;
step S2: inputting the actual blocking degree of the breathing orifice of the gas alarm into a difference model F (x);
step S3: and acquiring actual operation data of a sensor of the gas alarm, and correcting a detection concentration value of the gas alarm according to a difference model F (x) of the actual blockage degree of the input breathing orifice.
Further, for better implementing the present invention, the established difference model f (x) includes:
detecting a difference model f (0) of the concentration value when a breathing orifice of the gas alarm is not blocked;
a difference model f (x) of concentration values is detected when the blockage degrees of breathing orifices of the gas alarm are different; wherein the respiratory orifice blockage degree x ranges from (0, 80% ], or (0, 90% ].
Furthermore, in order to better implement the present invention, the step of establishing a difference model f (x) of the detected concentration values of the gas alarm under different blockage degrees of the breathing orifice of the gas alarm comprises:
releasing natural gas with the volume fraction alpha to a gas alarm with an unblocked breathing orifice, obtaining operation data beta at a sensor of the gas alarm after the release time t, and establishing a difference model f (0) of a detection concentration value when the breathing orifice of the gas alarm is unblocked;
and (3) releasing the natural gas with the volume fraction alpha to a gas alarm with the respiratory orifice blockage degree of (0, 80%) or (0, 90%), obtaining operation data beta' at a sensor of the gas alarm after the release time t, and establishing a difference model f (x) of detection concentration values when the respiratory orifice blockage degree of the gas alarm is different.
Further, in order to better implement the present invention, the step of inputting the actual blockage degree of the breathing orifice of the gas alarm into the difference model f (x) comprises:
if the breathing orifice of the gas alarm is not blocked, inputting the blocking degree x =0 into a difference model F (x) to obtain a difference model f (0);
if the blockage degree of the breathing orifice of the gas alarm is (0, 80%) or (0, 90%), the blockage degree x = (0, 80%) or x = (0, 90%) is input into the difference model F (x), and the difference model f (0, 80) or f (0, 90) is obtained.
Further, to better implement the present invention, the difference model f (0, 80) or f (0, 90) includes:
if the blockage degree of the breathing orifice of the gas alarm is 20%, inputting the blockage degree x =20% into a difference model F (x) to obtain a difference model f (20);
if the blockage degree of the breathing orifice of the gas alarm is 40%, inputting the blockage degree x =40% into a difference model F (x) to obtain a difference model f (40);
if the blockage degree of the breathing orifice of the gas alarm is 60%, inputting the blockage degree x =60% into a difference model F (x) to obtain a difference model f (60);
if the blockage degree of the breathing orifice of the gas alarm is 80%, inputting the blockage degree x =80% into a difference model F (x) to obtain a difference model f (80);
if the blockage degree of the breathing orifice of the gas alarm is 90%, inputting the blockage degree x =90% into a difference model F (x) to obtain a difference model f (90).
Furthermore, in order to better implement the invention, the step of obtaining actual operation data at a sensor of the gas alarm and correcting the detection concentration value of the gas alarm according to the difference model F (x) of the actual blockage degree of the input respiratory orifice comprises the following steps:
and (3) transmitting actual operation data of a sensor of the gas alarm at the time t 'into the difference model F (x) of the actual blockage degree of the input respiratory orifice to obtain sensor operation data corresponding to the difference model f (0) when the respiratory orifice is not blocked at the time t', wherein the sensor operation data corresponding to the difference model f (0) is a detection concentration value corrected by the gas alarm.
Further, in order to better implement the present invention, the method further includes step S4: and judging the concentration value detected by the corrected gas alarm, and alarming if the concentration value exceeds a set threshold value.
Greasy dirt plugged hole leads to gas alarm signal lag's correcting unit, including controller, sensor, alarm module, correction module, storage module, wherein:
the storage module is used for storing the established difference model F (x);
a sensor for detecting a concentration value after leakage of natural gas;
the correction module is used for correcting the concentration value detected by the sensor to obtain the actual leakage concentration value of the natural gas;
and the alarm module is used for alarming when the concentration value of the actual natural gas leakage exceeds a set threshold value.
Compared with the prior art, the invention has the beneficial effects that:
the method comprises the steps of firstly establishing a difference model F (x) when the breathing orifice has different blockage degrees and releases different volumes for natural gas, then inputting the blockage degree of the breathing orifice of the actual gas sensor in use into the difference model F (x), obtaining a concentration value when the breathing orifice of the gas sensor is not blocked under the condition that the natural gas with the volume fraction is leaked from the difference model F (x), wherein the concentration value is the actual leakage concentration value of the natural gas corrected by the gas sensor, and alarming if the actual leakage concentration value exceeds a set threshold value. When the breathing orifice of the gas alarm is blocked, the concentration value detected by the sensor is corrected by the scheme, so that the phenomenon of false alarm or failure in reporting caused by detection errors is avoided, the breathing orifice is not required to be maintained or replaced due to partial blocking, the cost is saved, and the problem of lagging alarm signals is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a flow chart of a correction method of the present invention;
FIG. 2 is a graph of a model of the difference between the degrees of blockage of the breathing orifice when a fixed volume fraction of natural gas is released in example 1 of the present invention;
FIG. 3 is a graph of a model of the difference in natural gas release for each volume fraction with a fixed blockage of the breathing orifice in example 1 of the present invention;
FIG. 4 is a block diagram of a modification apparatus according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Also, in the description of the present invention, the terms "first", "second", and the like are used for distinguishing between descriptions and not necessarily for describing a relative importance or implying any actual relationship or order between such entities or operations.
Example 1:
the invention is realized by the following technical scheme, as shown in figure 1, a correction method for gas alarm signal lag caused by oil stain hole blocking comprises the following steps:
step S1: and establishing a difference model F (x) of the detection concentration value of the gas alarm under different blockage degrees of the breathing orifice of the gas alarm.
When the blockage degrees of breathing orifices of the gas alarm are different, the natural gas with the same volume fraction is released to a sensor of the gas alarm, the operation data of the sensor are different, namely, the natural gas concentration values detected by the sensor are different. In other words, if the degree of blockage of the breathing orifice of the gas alarm is low, the concentration value detected by the sensor when the same volume fraction of natural gas is released is higher than the concentration value detected when the degree of the breathing orifice is high.
As shown in fig. 2, assuming that 2% by volume of natural gas is respectively released to the gas alarm devices with the respiratory orifices not blocked, 20% blocked, 40% blocked, 60% blocked and 80% blocked, when the diffusion time is 200s, it can be known from fig. 2 that the natural gas concentration value detected at the sensor of the gas alarm device decreases with the increase of the blockage degree of the respiratory orifices, and the ordinate of fig. 2 is the natural gas concentration value detected at the sensor.
However, fig. 2 only shows that natural gas with a fixed volume fraction of 2% is respectively released to the gas alarm devices with different degrees of blockage of the breathing orifices, and when the degrees of blockage of the breathing orifices are fixed, the volume fractions of the released natural gas are different, and the concentration values of the natural gas detected at the sensors are also different. In other words, the greater the volume fraction of natural gas released, the higher the value of the natural gas concentration detected at the sensor of the gas alarm when the degree of obstruction of the breathing orifice is fixed.
As shown in fig. 3, assuming that the degree of blockage of the breathing orifice is 80%, 2%, 4%, 6%, 8% by volume of natural gas is respectively released to the gas alarm, when the diffusion time is 200s, it can be seen from fig. 3 that the value of the natural gas concentration detected at the sensor of the gas alarm increases as the volume fraction of the released natural gas increases.
Therefore, when the blockage degree of the breathing orifice changes or the volume fraction of the natural gas released (leaked) changes, the natural gas concentration value detected by the sensor of the gas alarm changes, so that the variable problems of the blockage degree of the breathing orifice and the volume fraction of the natural gas leaked need to be considered simultaneously when the difference model f (x) is established in the embodiment.
For example, the difference models f (x) under different respiratory orifice blocking degrees when the natural gas with the same volume fraction leaks are respectively established, and then the volume fraction variables of the natural gas leakage are sequentially changed, so that the difference models f (x) under different respiratory orifice blocking degrees under different volume fractions of the natural gas leakage are obtained.
Then, it can be assumed that, at another certain leakage volume fraction, the difference model of the detected concentration value when the breathing orifice of the gas alarm is not blocked is f (0), and the difference model of the detected concentration value when the breathing orifice of the gas alarm is not blocked is f (x). The range of the degree of obstruction x in which breathing is empty may be (0, 80% ], or (0, 90% ].
Step S2: and inputting the actual blockage degree of the breathing orifice of the gas alarm into a difference model F (x).
In the embodiment, the blockage degree of the breathing orifice of the gas alarm is input into the difference model F (x) when the gas alarm is actually used at home, the blockage degree of the breathing orifice is quantitative, and a user can determine the blockage degree of the breathing orifice in other modes, such as direct observation by eyes or detection of the blockage degree of the breathing orifice by adding other devices.
In the present embodiment, assuming that the degree of blockage of the breathing orifice of the gas alarm is 80%, x =80% is input into f (x), and a difference model f (80) is obtained, which is the model shown in fig. 3.
Step S3: and acquiring actual operation data of a sensor of the gas alarm, and correcting a detection concentration value of the gas alarm according to a difference model F (x) of the actual blockage degree of the input breathing orifice.
Now, as shown in fig. 3, the model parameter when the blockage degree is 80% is obtained, and the actual detection concentration value detected by the sensor of the gas alarm at the diffusion time of 200s is obtained, that is, the curve on which volume fraction the corresponding point is specifically located can be obtained, and this curve is the actual concentration value of the natural gas leakage, that is, the detection concentration value corrected by the sensor.
As another possible implementation manner, when the blockage degree of the breathing orifice is 80%, acquiring an actual detection concentration value detected by a sensor of the gas alarm when the diffusion time is 200s, and transmitting the actual detection concentration value into a difference model f (x) with the blockage degree of 80%, so as to obtain sensor operation data corresponding to the difference model f (0) when the breathing orifice is not blocked under the same volume fraction of natural gas leakage when the diffusion time is 200s, and the sensor operation data corresponding to the difference model f (0) is the detection concentration value corrected by the gas alarm.
Step S4: and judging the concentration value detected by the corrected gas alarm, and alarming if the concentration value exceeds a set threshold value.
And obtaining a corrected concentration value, judging whether the corrected concentration value exceeds a set threshold value or not, wherein the set threshold value can be the concentration value when the leaked natural gas concentration threatens the human body, and alarming if the corrected concentration value exceeds the set threshold value.
In summary, the invention firstly establishes a difference model f (x) when the breathing orifice has different blockage degrees and releases different volumes for several natural gases, and then inputs the blockage degree of the breathing orifice of the actual gas sensor in use into the difference model f (x), so that the concentration value of the natural gas sensor when the breathing orifice is not blocked under the condition of natural gas leakage of the volume fraction can be obtained from the difference model f (x), the concentration value is the corrected natural gas actual leakage concentration value of the gas sensor, and if the actual leakage concentration value exceeds a set threshold value, an alarm is given.
When the breathing orifice of the gas alarm is blocked, the concentration value detected by the sensor is corrected by the scheme, so that the phenomenon of false alarm or failure in reporting caused by detection errors is avoided, the breathing orifice is not required to be maintained or replaced due to partial blocking, the cost is saved, and the problem of lagging alarm signals is solved.
Based on the correction method, the invention also provides a correction device for the gas alarm signal lag caused by oil stain hole blockage, which comprises a controller, a sensor, an alarm module, a correction module and a storage module, wherein the sensor, the alarm module, the correction module and the storage module are respectively connected with the controller, and the correction device comprises:
the storage module is used for storing the established difference model F (x);
a sensor for detecting a concentration value after leakage of natural gas;
the correction module is used for correcting the concentration value detected by the sensor to obtain the actual leakage concentration value of the natural gas;
and the alarm module is used for alarming when the concentration value of the actual natural gas leakage exceeds a set threshold value.
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 claims.
Claims (5)
1. The correction method for the signal lag of the gas alarm caused by oil stain hole blockage is characterized by comprising the following steps of: the method comprises the following steps:
step S1: establishing a difference model F (x) of detection concentration values of the gas alarm under different blockage degrees of a breathing orifice of the gas alarm;
step S2: inputting the actual blocking degree of the breathing orifice of the gas alarm into a difference model F (x);
step S3: acquiring actual operation data of a sensor of the gas alarm, and correcting a detection concentration value of the gas alarm according to a difference model F (x) of an input actual blockage degree of a breathing orifice;
the established difference model f (x) comprises:
detecting a difference model f (0) of the concentration value when a breathing orifice of the gas alarm is not blocked;
a difference model f (x) of concentration values is detected when the blockage degrees of breathing orifices of the gas alarm are different; wherein the respiratory orifice obstruction degree x ranges from (0, 80% ], or (0, 90% ];
the step of establishing a difference model F (x) of the detection concentration value of the gas alarm under different blockage degrees of a breathing orifice of the gas alarm comprises the following steps:
releasing natural gas with the volume fraction alpha to a gas alarm with an unblocked breathing orifice, obtaining operation data beta at a sensor of the gas alarm after the release time t, and establishing a difference model f (0) of a detection concentration value when the breathing orifice of the gas alarm is unblocked;
releasing natural gas with volume fraction alpha to a gas alarm with the blockage degree of a breathing orifice of (0, 80% ] or (0, 90% ]), obtaining operation data beta' at a sensor of the gas alarm after the release time t, and establishing a difference model f (x) of detection concentration values when the blockage degree of the breathing orifice of the gas alarm is different;
acquiring actual operation data of a sensor of the gas alarm, and correcting a detection concentration value of the gas alarm according to a difference model F (x) of an input actual blockage degree of a breathing orifice, wherein the step comprises the following steps:
and (3) transmitting actual operation data of a sensor of the gas alarm at the time t 'into the difference model F (x) of the actual blockage degree of the input respiratory orifice to obtain sensor operation data corresponding to the difference model f (0) when the respiratory orifice is not blocked at the time t', wherein the sensor operation data corresponding to the difference model f (0) is a detection concentration value corrected by the gas alarm.
2. The method for correcting signal lag of a gas alarm caused by oil pollution hole blockage according to claim 1, which is characterized in that: the step of inputting the actual blockage degree of the breathing orifice of the gas alarm into a difference model F (x) comprises the following steps:
if the breathing orifice of the gas alarm is not blocked, inputting the blocking degree x =0 into a difference model F (x) to obtain a difference model f (0);
if the blockage degree of the breathing orifice of the gas alarm is (0, 80%) or (0, 90%), the blockage degree x = (0, 80%) or x = (0, 90%) is input into the difference model F (x), and the difference model f (0, 80) or f (0, 90) is obtained.
3. The method for correcting signal lag of a gas alarm caused by oil pollution hole blockage according to claim 2, characterized in that: the difference model f (0, 90) includes:
if the blockage degree of the breathing orifice of the gas alarm is 20%, inputting the blockage degree x =20% into a difference model F (x) to obtain a difference model f (20);
if the blockage degree of the breathing orifice of the gas alarm is 40%, inputting the blockage degree x =40% into a difference model F (x) to obtain a difference model f (40);
if the blockage degree of the breathing orifice of the gas alarm is 60%, inputting the blockage degree x =60% into a difference model F (x) to obtain a difference model f (60);
if the blockage degree of the breathing orifice of the gas alarm is 80%, inputting the blockage degree x =80% into a difference model F (x) to obtain a difference model f (80);
if the blockage degree of the breathing orifice of the gas alarm is 90%, inputting the blockage degree x =90% into a difference model F (x) to obtain a difference model f (90).
4. The method for correcting signal lag of a gas alarm caused by oil pollution hole blockage according to any one of claims 1 to 3, wherein the method comprises the following steps: further comprising step S4: and judging the concentration value detected by the corrected gas alarm, and alarming if the concentration value exceeds a set threshold value.
5. The oil stain hole blocking causes the correcting device that the gas alarm signal lags behind, its characterized in that: including controller, sensor, alarm module, correction module, storage module, wherein:
the storage module is used for storing the established difference model F (x);
a sensor for detecting a concentration value after leakage of natural gas;
the correction module is used for correcting the concentration value detected by the sensor to obtain the actual leakage concentration value of the natural gas;
the alarm module is used for alarming when the concentration value of the actual natural gas leakage exceeds a set threshold value;
the correction module transmits actual operation data of a sensor of the gas alarm at the time t 'into a difference model F (x) of the actual blockage degree of an input respiratory orifice to obtain sensor operation data corresponding to the difference model f (0) when the respiratory orifice is not blocked at the time t', wherein the sensor operation data corresponding to the difference model f (0) is a detection concentration value corrected by the gas alarm;
the correction device operates with the correction method as claimed in claim 1.
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