CN112071015A - Self-adaptive smoke identification method and device of gas-sensitive smoke sensor for mine - Google Patents
Self-adaptive smoke identification method and device of gas-sensitive smoke sensor for mine Download PDFInfo
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- CN112071015A CN112071015A CN202011001519.3A CN202011001519A CN112071015A CN 112071015 A CN112071015 A CN 112071015A CN 202011001519 A CN202011001519 A CN 202011001519A CN 112071015 A CN112071015 A CN 112071015A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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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
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Abstract
The invention discloses a self-adaptive smoke identification method of a mine gas-sensitive smoke sensor, which comprises the following steps: collecting smoke signal d of monitoring point1，d2，d3……dnSaid smoke signal d1，d2，d3……dnThe sampling interval time is; Δ t; when smoke is generated, judging the smoke signal d1，d2，d3……dnWhether the sequence is increased progressively or not, if not, continuing to acquire data; if yes, marking the process as a suspected smoke generation process, and executing the step S3; calculating d of the smoke signal1，d2，d3……dnSmoke signal slope value knThe calculated smoke signal slope value k is usednWhen the smoke signal slope value k is compared with the reference slope value knGreater than or equal to the reference slopeWhen the value k is equal, marking the smoke generation process as one time; s4: calculating the smoke signal dnAnd D is the smoke sensitivity, and if the difference delta D is larger than or equal to D, the smoke is judged to be generated.
Description
Technical Field
The invention relates to a self-adaptive smoke identification method and device of a mining gas-sensitive smoke sensor.
Background
The gas-sensitive smoke sensor is an important sensing device for detecting early fire smoke in a coal mine tunnel. The gas-sensitive smoke sensor has the advantages of quick smoke response, coal dust interference resistance, low price and the like, and is widely applied to the field of mine gas-sensitive smoke sensors. However, in a coal mine environment, more or less combustible gas such as methane exists, and a part of mines use equipment such as diesel locomotives, so that a high concentration of carbon monoxide gas exists in underground roadways. The gas type to which the gas-sensitive smoke sensor is sensitive is easy to cause false alarm, and the safety production of the coal mine is greatly influenced.
Disclosure of Invention
The invention aims to provide a self-adaptive smoke recognition method of a mining gas-sensitive smoke sensor, which aims to solve the problem that the existing gas-sensitive smoke sensor is easy to generate false alarm in the smoke recognition process.
In order to solve the technical problem, the invention provides a self-adaptive smoke identification method of a mine gas-sensitive smoke sensor, which comprises the following steps of
S1: collecting smoke signal d of monitoring point1，d2，d3……dnSaid smoke signal d1，d2，d3……dnThe sampling interval time is; Δ t;
s2: when smoke is generated, judging the smoke signal d1，d2，d3……dnWhether the sequence is increased progressively or not, if not, continuing to acquire data; if yes, marking the process as a suspected smoke generation process, and executing the step S3;
s3: calculating d of the smoke signal1，d2，d3……dnSmoke signal slope value knThe calculated smoke signal slope value k is usednWhen the smoke signal slope value k is compared with the reference slope value knWhen the value is larger than or equal to the reference slope value k, marking as a smoke generation process;
s4: calculating the smoke signal dnAnd D is the smoke sensitivity, and if the difference delta D is larger than or equal to D, the smoke is judged to be generated.
Further, the method adopts a gas-sensitive smoke sensor to collect smoke signals of monitoring points, and the reference zero point Z of the gas-sensitive smoke sensor is adaptively adjusted according to different air environments of a coal mine tunnel.
Further, the gas-sensitive smoke sensor adaptively adjusts the reference zero point Z thereof by the following method:
d of smoke signal at any time during non-smoke generation1，d2，d3……dnSmoke signal slope value knAnd if the current smoke signal is close to 0, saving the current smoke signal as a reference zero point Z.
Further, the smoke signal slope value knThe calculation method comprises the following steps:
Kn＝(dn-d(n-1))/Δt。
in addition, the invention also provides an adaptive smoke recognition device of the gas-sensitive smoke sensor for the mine, which comprises
The smoke acquisition unit is used for acquiring smoke signals of monitoring points;
the signal processing unit is used for converting the smoke signal into a digital signal and sending the converted smoke signal to the controller;
a controller having a computing program stored thereon, the program when executed by the controller being capable of performing the steps of:
s1: collecting smoke signal d of monitoring point after digital conversion1，d2，d3……dnSaid smoke signal d1，d2，d3……dnThe sampling interval time is; Δ t;
s2: when smoke is generated, judging the smoke signal d1，d2，d3……dnWhether the sequence is increased progressively or not, if not, continuing to acquire data; if yes, marking the process as a suspected smoke generation process, and executing the step S3;
s3: calculating d of the smoke signal1，d2，d3……dnSmoke signal slope value knThe calculated smoke signal slope value k is usednWhen the smoke signal slope value k is compared with the reference slope value knWhen the value is larger than or equal to the reference slope value k, marking as a smoke generation process;
s4: calculating the smoke signal dnAnd D is the smoke sensitivity, and if the difference delta D is larger than or equal to D, the smoke is judged to be generated.
Further, the smoke collection unit includes a gas-sensitive smoke sensor.
Further, the signal processing unit comprises an analog signal amplifying circuit and an A/D converter which are sequentially connected, the input end of the analog signal amplifying circuit is connected with the output end of the gas-sensitive smoke sensor, and the output end of the A/D converter is connected with the input end of the controller.
Further, the reference zero point Z of the gas-sensitive smoke sensor is adaptively adjusted according to different air environments of a coal mine tunnel.
Further, the gas-sensitive smoke sensor adaptively adjusts the reference zero point Z thereof by the following method:
d of smoke signal at any time during non-smoke generation1，d2，d3……dnSmoke signal slope value knAnd if the current smoke signal is close to 0, saving the current smoke signal as a reference zero point Z.
The invention has the beneficial effects that: by identifying the smoke signal d of the monitoring point1，d2，d3……dnThe change situation of the smoke alarm is compared with the smoke generation process, whether the collected smoke signals are abnormal or not is judged, so that the situation that the false identification occurs due to the fact that methane, carbon monoxide and other gas interference exists in a coal mine tunnel is avoided, and the reliability and the stability of the smoke alarm are improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a flow chart of an adaptive smoke identification method of a gas-sensitive smoke sensor for a mine;
fig. 2 is a structural block diagram of an adaptive smoke recognition device of a mining gas-sensitive smoke sensor.
Detailed Description
The self-adaptive smoke identification method of the gas-sensitive smoke sensor for the mine as shown in figure 1 comprises the following steps
S1: collecting smoke signal d of monitoring point1，d2，d3……dnSaid smoke signal d1，d2，d3……dnThe sampling interval time is delta t;
s2: when smoke is generated, judging the smoke signal d1，d2，d3……dnIf it is an increasing sequence, if the smoke signal d1，d2，d3……dnIf the sequence is an incremental sequence, marking the sequence as a suspected smoke generation process, and executing step S3; if the smoke signal d1，d2，d3……dnIf the number is a descending number series, marking the suspected smoke disappearance process; if the smoke signal d1，d2，d3……dnIf the change is other, marking as non-smoke;
s3: calculating d of the smoke signal1，d2，d3……dnSmoke signal slope value knThe calculated smoke signal slope value k is usednComparing with a reference slope value k (wherein the reference slope value k is calculated from test sample data), when the smoke signal slope value k is detectednWhen the value is larger than or equal to the reference slope value k, marking as a smoke generation process;
s4: calculating the smoke signal dnAnd D is the smoke sensitivity, and if the difference delta D is larger than or equal to D, the smoke is judged to be generated.
According to one embodiment of the application, a gas-sensitive smoke sensor is adopted to collect smoke signals of a monitoring point, and the reference zero point Z of the gas-sensitive smoke sensor is adaptively adjusted according to different air environments of a coal mine tunnel.
According to one embodiment of the application, the gas-sensitive smoke sensor adaptively adjusts the reference zero point Z thereof by the following method:
d of smoke signal at any time during non-smoke generation1，d2，d3……dnSmoke signal slope value knAnd if the current smoke signal is close to 0, saving the current smoke signal as a reference zero point Z.
According to one embodiment of the application, the smoke signal slope value knThe calculation method comprises the following steps:
Kn＝(dn-d(n-1))/Δt；
namely: k1＝(d2-d1)/Δt，K2＝(d3-d2)/Δt，K3＝(d4-d3)/Δt，……，Kn＝(dn-d(n-1))/Δt。
In addition, as shown in fig. 2, the invention also discloses an adaptive smoke recognition device of the gas-sensitive smoke sensor for the mine, which comprises
The smoke acquisition unit is used for acquiring smoke signals of monitoring points;
the signal processing unit is used for converting the smoke signal into a digital signal and sending the converted smoke signal to the controller;
a controller having a computing program stored thereon, the program when executed by the controller being capable of performing the steps of:
s1: collecting smoke signal d of monitoring point1，d2，d3……dnSaid smoke signal d1，d2，d3……dnThe sampling interval time is delta t;
s2: when smoke is generated, judging the smoke signal d1，d2，d3……dnIf it is an increasing sequence, if the smoke signal d1，d2，d3……dnIf the sequence is an incremental sequence, marking the sequence as a suspected smoke generation process, and executing step S3; if the smoke signal d1，d2，d3……dnIf the number is a descending number series, marking the suspected smoke disappearance process; if the smoke signal d1，d2，d3……dnIf the change is other, marking as non-smoke;
s3: calculating d of the smoke signal1，d2，d3……dnSmoke signal slope value knThe calculated smoke signal slope value k is usednComparing with a reference slope value k (wherein the reference slope value k is calculated from test sample data), when the smoke signal slope value k is detectednWhen the value is larger than or equal to the reference slope value k, marking as a smoke generation process;
s4: calculating the smoke signal dnAnd D is the smoke sensitivity, and if the difference delta D is larger than or equal to D, the smoke is judged to be generated.
According to one embodiment of the application, the smoke collection unit comprises a gas sensitive smoke sensor.
According to an embodiment of the present application, the signal processing unit includes an analog signal amplifying circuit and an a/D converter connected in sequence, an input end of the analog signal amplifying circuit is connected with an output end of the gas-sensitive smoke sensor, and an output end of the a/D converter is connected with an input end of the controller.
According to one embodiment of the application, the reference zero point Z of the gas-sensitive smoke sensor is adaptively adjusted according to different air environments of a coal mine tunnel.
According to one embodiment of the application, the gas-sensitive smoke sensor adaptively adjusts the reference zero point Z thereof by the following method:
d of smoke signal at any time during non-smoke generation1，d2，d3……dnSmoke signal slope value knAnd if the current smoke signal is close to 0, saving the current smoke signal as a reference zero point Z.
The invention identifies the smoke signal d of the monitoring point1，d2，d3……dnThe change situation of the smoke alarm is compared with the smoke generation process, whether the collected smoke signals are abnormal or not is judged, so that the situation that the false identification occurs due to the fact that methane, carbon monoxide and other gas interference exists in a coal mine tunnel is avoided, and the reliability and the stability of the smoke alarm are improved. Moreover, the invention also adjusts the gas sensitivity in a self-adaptive wayThe reference zero point Z of the gas-sensitive smoke sensor can be adaptively adjusted according to the air environments of different coal mine tunnels, so that the gas-sensitive smoke sensor changes along with the change of time and space, and the reference zero point Z of the gas-sensitive element signal is adaptively adjusted and stored
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. A self-adaptive smoke identification method of a gas-sensitive smoke sensor for mining is characterized by comprising the following steps
S1: collecting smoke signal d of monitoring point1，d2，d3……dnSaid smoke signal d1，d2，d3……dnThe sampling interval time is; Δ t;
s2: when smoke is generated, judging the smoke signal d1，d2，d3……dnWhether the sequence is increased progressively or not, if not, continuing to acquire data; if yes, marking the process as a suspected smoke generation process, and executing the step S3;
s3: calculating d of the smoke signal1，d2，d3……dnSlope value k of smoke signalnThe calculated smoke signal slope value k is usednWhen the smoke signal slope value k is compared with the reference slope value knWhen the value is larger than or equal to the reference slope value k, marking as a smoke generation process;
s4: calculating the smoke signal dnAnd D is the smoke sensitivity, and if the difference delta D is larger than or equal to D, the smoke is judged to be generated.
2. The self-adaptive smoke identification method of the gas-sensitive smoke sensor for the mine according to claim 1, characterized in that the method adopts the gas-sensitive smoke sensor to collect smoke signals of monitoring points, and the reference zero point Z of the gas-sensitive smoke sensor is self-adaptively adjusted according to different air environments of a coal mine tunnel.
3. The self-adaptive smoke identification method of the gas-sensitive smoke sensor for the mine as claimed in claim 2, wherein the gas-sensitive smoke sensor self-adaptively adjusts the reference zero point Z thereof by the following method:
d of smoke signal at any time during non-smoke generation1，d2，d3……dnSmoke signal slope value knAnd if the current smoke signal is close to 0, saving the current smoke signal as a reference zero point Z.
4. The adaptive smoke identification method of the gas-sensitive smoke sensor for mines according to claim 1, wherein the value k of the slope of the smoke signal isnThe calculation method comprises the following steps:
Kn＝(dn-d(n-1))/Δt。
5. a self-adaptive smoke recognition device of a mining gas-sensitive smoke sensor is characterized by comprising
The smoke acquisition unit is used for acquiring smoke signals of monitoring points;
the signal processing unit is used for converting the smoke signal into a digital signal and sending the converted smoke signal to the controller;
a controller having a computing program stored thereon, the program when executed by the controller being capable of performing the steps of:
s1: collecting smoke signal d of monitoring point after digital conversion1，d2，d3……dnSaid smoke signal d1，d2，d3……dnThe sampling interval time is; Δ t;
s2: when smoke is generated, judging the smoke signal d1，d2，d3……dnWhether the sequence is increased progressively or not, if not, continuing to acquire data; if yes, marking the process as a suspected smoke generation process, and executing the step S3;
s3: calculating d of the smoke signal1，d2，d3……dnSmoke signal slope value knThe calculated smoke signal slope value k is usednWhen the smoke signal slope value k is compared with the reference slope value knWhen the value is larger than or equal to the reference slope value k, marking as a smoke generation process;
s4: calculating the smoke signal dnAnd D is the smoke sensitivity, and if the difference delta D is larger than or equal to D, the smoke is judged to be generated.
6. The adaptive smoke recognition device of the gas-sensitive smoke sensor for mines according to claim 5, wherein the smoke collection unit comprises a gas-sensitive smoke sensor.
7. The adaptive smoke recognition device of the gas-sensitive smoke sensor for the mine according to claim 5 or 6, wherein the signal processing unit comprises an analog signal amplifying circuit and an A/D conversion circuit which are connected in sequence, wherein an input end of the analog signal amplifying circuit is connected with an output end of the gas-sensitive smoke sensor, and an output end of the A/D conversion circuit is connected with an input end of the controller.
8. The self-adaptive smoke recognition device of the gas-sensitive smoke sensor for the mine as claimed in claim 5, wherein the reference zero point Z of the gas-sensitive smoke sensor is self-adaptively adjusted according to different air environments of a coal mine tunnel.
9. The adaptive smoke recognition device of the gas-sensitive smoke sensor for the mine according to claim 8, wherein the gas-sensitive smoke sensor adaptively adjusts the reference zero point Z of the gas-sensitive smoke sensor by the following method:
during non-aerosol generation, at any timeD of the smoke signal1，d2，d3……dnSmoke signal slope value knAnd if the current smoke signal is close to 0, saving the current smoke signal as a reference zero point Z.
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Cited By (1)
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Application publication date: 20201211 |