CN117310094B - Wearable equipment with gas detection alarming function - Google Patents
Wearable equipment with gas detection alarming function Download PDFInfo
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- CN117310094B CN117310094B CN202311258942.5A CN202311258942A CN117310094B CN 117310094 B CN117310094 B CN 117310094B CN 202311258942 A CN202311258942 A CN 202311258942A CN 117310094 B CN117310094 B CN 117310094B
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- 238000001514 detection method Methods 0.000 title claims abstract description 80
- 239000007789 gas Substances 0.000 claims abstract description 335
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 claims abstract description 180
- 229910000037 hydrogen sulfide Inorganic materials 0.000 claims abstract description 179
- 230000002159 abnormal effect Effects 0.000 claims abstract description 41
- 238000012545 processing Methods 0.000 claims abstract description 29
- 238000011156 evaluation Methods 0.000 claims abstract description 28
- 238000005070 sampling Methods 0.000 claims description 54
- 230000008859 change Effects 0.000 claims description 32
- 238000003860 storage Methods 0.000 claims description 18
- 238000002360 preparation method Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 8
- 230000003993 interaction Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002341 toxic gas Substances 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000007380 fibre production Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 210000000653 nervous system Anatomy 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 231100000167 toxic agent Toxicity 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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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 or the display, e.g. intermittent measurement or digital display
- G01N33/0063—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means
- G01N33/0065—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display using a threshold to release an alarm or displaying means using more than one threshold
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/24—Suction devices
-
- 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
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
- G01N33/0044—Sulphides, e.g. H2S
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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
- G08B21/14—Toxic gas alarms
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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
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/182—Level alarms, e.g. alarms responsive to variables exceeding a threshold
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B3/00—Audible signalling systems; Audible personal calling systems
- G08B3/10—Audible signalling systems; Audible personal calling systems using electric transmission; using electromagnetic transmission
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- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Toxicology (AREA)
- Combustion & Propulsion (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Business, Economics & Management (AREA)
- Food Science & Technology (AREA)
- Environmental & Geological Engineering (AREA)
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- Molecular Biology (AREA)
- Biomedical Technology (AREA)
- Electromagnetism (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
Abstract
The invention relates to the technical field of gas detection, in particular to a wearable device with a gas detection alarm function, which comprises an acquisition module, a detection module and a detection module, wherein the acquisition module is used for acquiring gas to be detected and detecting the concentration of hydrogen sulfide in the gas; the processing module is used for judging the abnormal concentration and the second normal concentration of the hydrogen sulfide in the gas to be detected and predicting the residual time when the concentration of the hydrogen sulfide in the gas to be detected reaches the abnormal concentration from the second normal concentration; the evaluation module is used for evaluating the concentration dangerous level of the hydrogen sulfide in the gas; and the alarm module is used for determining an alarm level according to the concentration danger level and sending out alarm volume of different levels according to the alarm level. The concentration grade is judged in sequence by the concentration of the hydrogen sulfide in the gas to be detected, and the residual time reaching the abnormal concentration is predicted, so that the gas detection alarm is more timely.
Description
Technical Field
The invention relates to the technical field of gas detection, in particular to a wearable device with a gas detection alarm function.
Background
Hydrogen sulfide is a flammable acidic colorless gas with low concentration and odorless egg smell, and high concentration and no smell. The hydrogen sulfide gas and the air can be mixed to form an explosive mixture, and combustion explosion is caused by the naked flame and high heat energy. It is also an acute highly toxic substance, and inhalation of low concentration hydrogen sulfide can produce visual and respiratory system irritation and affect the nervous system, and inhalation of small amounts of high concentration hydrogen sulfide can be fatal in a short time. Hydrogen sulfide gas is produced during various production processes such as sewage treatment, paper making, petroleum processing, fertilizer production, chemical fiber production, and production of certain chemical raw materials. The standard GBZ/T2.1-2007 standard of the first part of chemical harmful factors of occupational contact limit value of all harmful factors of working field, the maximum allowable concentration of hydrogen sulfide in working field is 10mg/m3, the standard of the TJ36-79 standard of industrial enterprise design sanitation, the maximum allowable concentration of hydrogen sulfide in the atmosphere of living area is 0.01mg/m3, and the standard of malodorous pollution factory boundary is specified in GB14554-93 standard of malodorous pollutant emission: first-order 0.03mg/m3; second-level (0.06-0.10) mg/m3; tertiary (0.32-0.60) mg/m3. When workers work in a workplace where hydrogen sulfide is generated, once the concentration of the hydrogen sulfide gas exceeds the standard, the life safety of the workers is possibly endangered, and even explosion occurs. Therefore, in places where hydrogen sulfide exposure is possible, workers wear equipment with a gas detection alarm function, and the equipment can timely detect the concentration of hydrogen sulfide gas in the air at the position and send out an alarm, so that the safety production method has important significance.
The patent document with the publication number of CN108287216A discloses a high-sensitivity hydrogen sulfide gas detector, which comprises a motor, a turbine and a toxic gas concentration monitoring box, wherein the turbine comprises a shell, a horn-shaped air inlet port arranged on the upper end surface of the shell and provided with an upward opening, an impeller arranged in the shell and a large-caliber gas transmission port, a rotating shaft of the impeller is connected with an output shaft of the motor, the gas transmission port is positioned at the other end of the rotating shaft of the impeller and communicated with the side surface of the shell, the toxic gas concentration monitoring box comprises an internal detection cavity and a hydrogen sulfide gas concentration detection probe arranged in the detection cavity, and one end of the gas transmission port, far away from the turbine, is communicated with the detection cavity.
However, the components of the hydrogen sulfide gas detector in the prior art are large, so that the detector is not suitable for wearing, and further the concentration of hydrogen sulfide in the air of a workplace cannot be detected at any time and any place and early warning is carried out, so that gas detection and warning are not timely.
Disclosure of Invention
Therefore, the invention provides the wearable equipment with the gas detection alarm function, which is used for solving the problem that the gas detection alarm is not timely in the prior art.
To achieve the above object, the present invention provides a wearable device having a gas detection alarm function, the system comprising: the collecting module is used for collecting gas to be detected through the sampling pump at preset time intervals and detecting the concentration of hydrogen sulfide in the gas to be detected through the hydrogen sulfide gas sensor;
The processing module is connected with the acquisition module and used for judging the abnormal concentration of the hydrogen sulfide in the gas to be detected according to the first judging condition, judging the second normal concentration of the hydrogen sulfide in the gas to be detected according to the second judging condition and predicting the residual time when the concentration of the hydrogen sulfide in the gas to be detected reaches the abnormal concentration from the second normal concentration according to the concentration change speed of the hydrogen sulfide in the gas to be detected; the first judgment condition is that the concentration of the hydrogen sulfide is more than a preset standard concentration, and the second judgment condition is that the concentration of the hydrogen sulfide at the i-th moment is more than the concentration of the hydrogen sulfide at the i-1 th moment;
the evaluation module is connected with the processing module and used for evaluating the concentration danger level of the hydrogen sulfide in the gas to be detected according to the second normal concentration, the abnormal concentration and the residual time from the second normal concentration to the abnormal concentration;
And the alarm module is connected with the processing module and used for determining whether to alarm and alarm grades according to the concentration danger grade and sending out alarm volume of different grades according to the alarm grade.
Further, the device also comprises a control module which is connected with the processing module and used for adjusting the rotating speed of the sampling pump according to the concentration change condition of the hydrogen sulfide in the gas to be detected and adjusting the time interval of the sampling pump for collecting the gas to be detected according to the concentration change speed of the gas to be detected.
Further, the acquisition module comprises a gas acquisition unit and a gas detection unit; the gas collection unit comprises a gas inlet, a gas outlet and a sampling pump, wherein the sampling pump is a miniature gas pump and is used for sucking the gas to be detected into the gas detection unit through the gas inlet and discharging the gas to be detected through the gas outlet; a filter screen is arranged at the air inlet and is used for filtering sundries in the air;
The gas detection unit comprises a gas storage cavity and a hydrogen sulfide gas sensor, wherein the gas storage cavity is used for storing gas to be detected, which is inhaled by the gas acquisition unit, and the hydrogen sulfide gas sensor is arranged in the gas storage cavity and is used for detecting the concentration of hydrogen sulfide in the gas to be detected; the gas storage cavity is arranged between the gas inlet and the gas outlet, the gas inlet end of the gas storage cavity is connected with the gas inlet through a gas inlet pipeline, and the gas outlet end of the gas storage cavity is connected with the gas outlet through a gas outlet pipeline.
Further, the processing module includes a first judging unit, a second judging unit and a calculating unit, wherein the first judging unit is configured to judge an abnormal concentration of hydrogen sulfide in the gas to be detected according to a first judging condition, and includes:
The processing module receives the hydrogen sulfide concentration Rs of the gas to be detected sent by the acquisition module, the standard hydrogen sulfide concentration Rs0 is preset in the first judgment unit,
When Rs is more than or equal to 0 and less than or equal to Rs0, the first judging unit judges that the hydrogen sulfide concentration of the gas to be detected is normal;
when Rs > Rs0, the first judging unit judges that the hydrogen sulfide concentration of the gas to be detected is abnormal concentration;
when the first judging unit judges that the concentration of the hydrogen sulfide in the gas to be detected is the normal concentration, the second judging unit judges a second normal concentration of the hydrogen sulfide in the gas to be detected according to a second judging condition, and the method comprises the following steps:
The concentration of hydrogen sulfide in the gas to be detected is time series data, the concentration of hydrogen sulfide at the ith moment is Rs (ti), the concentration of hydrogen sulfide at the ith-1 moment is Rs (t (i-1)), rs (ti) is less than or equal to Rs0 and Rs (ti) is less than or equal to Rs0, then:
When Rs (ti) -Rs (t (i-1)). Ltoreq.0, the second judgment unit judges that the concentration Rs (ti) of hydrogen sulfide at the i-th time is the first normal concentration;
when Rs (ti) -Rs (t (i-1)) > 0, the second judgment unit judges that the concentration Rs (ti) of hydrogen sulfide at the i-th time is the second normal concentration.
Further, the calculating unit is configured to predict a remaining time when the concentration of the hydrogen sulfide in the gas to be detected reaches the abnormal concentration from the second normal concentration according to the change speed of the concentration of the hydrogen sulfide in the gas to be detected, and includes:
The calculation unit calculates the change speed of the concentration of the hydrogen sulfide as VRs= [ Rs (t i) -Rs (t (i-1)) ]/Δt, wherein Δt is the preset time interval, Δt= t i-t (i-1), t i is the time value of the sampling pump for collecting the gas to be detected at the ith moment, and t (i-1) is the time value of the sampling pump for collecting the gas to be detected at the ith moment;
When Rs (ti) is less than or equal to Rs0 and Rs (ti) -Rs (t (i-1)) > 0, the calculation unit calculates a remaining time for the concentration of the current hydrogen sulfide to reach an abnormal concentration from the second normal concentration as ty= [ Rs0-Rs (ti) ]/VRs.
Further, when the concentration of the hydrogen sulfide in the gas to be detected is the first normal concentration, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected to be a safety level;
When the concentration of the hydrogen sulfide in the gas to be detected is the second normal concentration, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected as a preparation dangerous level; a standard remaining time ty0 for reaching the abnormal concentration from the second normal concentration is preset at the evaluation module,
When ty is larger than ty0, the evaluation module evaluates the concentration of hydrogen sulfide in the gas to be detected as a first preparation danger level;
When the ty is more than 0 and less than or equal to the ty0, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected as a second preparation danger level;
and when the concentration of the hydrogen sulfide in the gas to be detected is abnormal, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected to be a serious danger level.
Further, the control module includes a first control unit and a second control unit, where the first control unit is configured to adjust a rotation speed of the sampling pump according to a change condition of a concentration of hydrogen sulfide in the gas to be detected, and includes:
When the concentration of the hydrogen sulfide of the gas to be detected is a first normal concentration, the first control unit sends a control instruction to the sampling pump to adjust the rotating speed of the sampling pump to be a first rotating speed; the first rotating speed n1=a1×n, wherein n is the rotating speed of the sampling pump, a1 is a first rotating speed regulating coefficient, (Rs (t i)/Rs (t (i-1))) 2 is less than or equal to a1 and less than or equal to 1;
When the hydrogen sulfide concentration of the gas to be detected is the second normal concentration, the first control unit sends a control instruction to the sampling pump to adjust the rotating speed of the sampling pump to be the second rotating speed; the second rotating speed n2=a2×n, wherein α2 is a second rotating speed regulating coefficient, and 1 < α2 is less than or equal to (Rs (ti)/Rs (t (i-1))) 2;
the second control unit is used for adjusting the time interval of the sampling pump for collecting the gas to be detected according to the change speed of the concentration of the gas to be detected,
Presetting a standard change speed VRs0 in the second control unit, wherein VRs0 > 0,
When VRs is less than or equal to 0, the second control unit does not send a control instruction to the acquisition module;
When VRs is more than 0 and less than or equal to VRs0, the second control unit sends a control instruction to the acquisition module to adjust the time interval for acquiring the gas to be detected to be a first time interval;
When VRs0 is more than VRs and less than or equal to 2 XVRs 0, the second control unit sends a control instruction to the acquisition module to adjust the time interval for acquiring the gas to be detected to be a second time interval;
When VRs is more than 2×VRs0, the second control unit sends a control instruction to the acquisition module to adjust the time interval for acquiring the gas to be detected to be a third time interval;
the first time interval is deltat1=beta1×deltat, wherein beta1 is a first time adjustment coefficient, beta0 is more than or equal to 0.8xβ0 and less than or equal to β1 < β0, and β0 is a preset standard adjustment coefficient;
the second time interval is deltat2=beta2×deltat, wherein beta2 is a second time adjustment coefficient, and 0.5xβ0 is less than or equal to β2 and less than 0.8xβ0;
The third time interval is Δt3=β3×Δt, where β3 is a third time adjustment coefficient, and 0.1×β0 is equal to or less than β3 and less than 0.5×β0.
Further, the alarm module comprises an alarm grade determining unit and an audio playing unit, wherein the alarm grade determining unit is used for determining whether to alarm and an alarm grade according to the concentration danger grade; the audio playing unit is used for sending out alarm volume of different levels according to the alarm level;
when the concentration of the hydrogen sulfide in the gas to be detected is at a safety level, the alarm module determines that no alarm is sent out;
When the concentration of the hydrogen sulfide in the gas to be detected is a first preparation dangerous level, the alarm module determines that the alarm level is a first-level alarm, and the audio playing unit sends out a first alarm volume;
When the concentration of the hydrogen sulfide in the gas to be detected is a second preparation dangerous level, the alarm module determines that the alarm level is a second alarm, and the audio playing unit sends out a second alarm volume;
When the concentration of the hydrogen sulfide in the gas to be detected is a serious danger level, the alarm module determines that the alarm level is three-level alarm, and the audio playing unit sends out a third alarm volume;
The third alarm volume is larger than the second alarm volume and larger than the first alarm volume.
Further, the gas detection device also comprises a positioning module which is connected with the acquisition module and used for determining the position of the gas to be detected through a GPS positioning system.
Further, the system also comprises a man-machine interaction module which is respectively connected with the acquisition module, the processing module, the evaluation module, the alarm module, the control module and the positioning module and used for displaying the concentration of hydrogen sulfide in the gas to be detected, the residual time and the danger level and receiving a data query instruction of a user.
Compared with the prior art, the method has the beneficial effects that the concentration of the hydrogen sulfide in the gas is detected in real time through the acquisition module; the abnormal concentration and the second normal concentration are judged in sequence through the processing module, the accuracy of gas detection and alarm is improved, and the timeliness of gas detection and alarm is improved by predicting the residual time when the concentration of hydrogen sulfide in the gas reaches the abnormal concentration from the second normal concentration; the concentration dangerous grade of hydrogen sulfide in the gas is evaluated by the evaluation module, objective basis is provided for grading alarm, and the reliability of gas detection alarm is high; the gas detection alarm is high in accuracy by the aid of the alarm modules for hierarchical alarm.
In particular, the rotating speed of the sampling pump and the time interval for collecting gas are adjusted through the control module, so that gas collection is more flexible.
In particular, the concentration of hydrogen sulfide in the gas is detected by sucking the gas into the gas detection unit through the sampling pump, so that the gas can enter the gas detection device at a specific flow rate and flow rate, and the accuracy of gas detection is improved.
In particular, the processing module sequentially judges the normal concentration and the abnormal concentration of the hydrogen sulfide in the gas and judges the first normal concentration and the second normal concentration, thereby being beneficial to improving the accuracy of gas detection and alarm; the calculation unit predicts the residual time when the concentration of the hydrogen sulfide in the gas reaches the abnormal concentration from the second normal concentration, and is beneficial to improving the timeliness of gas detection and alarm.
In particular, the assessment module is used for assessing the dangerous level of the concentration according to the gas concentration and the residual time, and providing objective basis for grading alarm, so that the reliability of gas detection alarm is high.
In particular, the rotating speed of the sampling pump is regulated by the first control unit according to the concentration change condition of the hydrogen sulfide in the gas, so that when the concentration is in a reduced state, the rotating speed of the sampling pump is reduced, and when the concentration is in a greater state, the rotating speed of the sampling pump is increased, so that the gas detection alarm device is more flexible, energy-saving and electricity-saving; the second control unit is used for adjusting the time interval of the sampling pump for collecting the gas according to the concentration change speed of the hydrogen sulfide in the gas, so that when the concentration change speed is high, the collected time interval is adjusted to be small, more detection data are obtained in a short time, and the reliability of gas detection alarm is improved.
In particular, the alarm level is determined according to the danger level through the alarm module, so that the gas detection alarm is more accurate, different levels of alarm volume are sent out according to the alarm level through the audio playing unit, and the timeliness of the alarm is improved.
In particular, the position of gas detection can be determined through the positioning module, so that the accuracy of gas detection is improved.
In particular, the human-computer interaction module displays data and receives a data query instruction of a user, so that the user can know the concentration value of hydrogen sulfide in the current gas in time, the reliability of the gas detection alarm device is improved, and the gas detection alarm device is high in timeliness.
Drawings
Fig. 1 is a schematic structural diagram of a wearable device with a gas detection alarm function according to the present invention;
fig. 2 is a schematic diagram of an acquisition module structure of the wearable device with a gas detection alarm function according to the present invention;
Fig. 3 is a schematic diagram of a processing module structure of the wearable device with the gas detection alarm function according to the present invention;
Fig. 4 is a schematic diagram of an alarm module structure of the wearable device with a gas detection alarm function according to the present invention;
Fig. 5 is a schematic structural diagram of a control module of the wearable device with the gas detection alarm function according to the present invention;
Reference numerals: 1. an acquisition module; 2. a processing module; 3. an evaluation module; 4. an alarm module; 5. a control module; 6. a positioning module; 7. a man-machine interaction module; 101. a gas collection unit; 102. a gas detection unit; 201. a first judgment unit; 202. a second judgment unit; 203. a calculation unit; 401. an alarm level determining unit; 402. an audio playing unit; 501. a first control unit; 502. and a second control unit.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
As shown in fig. 1-5, the wearable device with the gas detection alarm function can be implemented as follows: as shown in fig. 1, the device comprises a collection module 1 for collecting gas to be detected through a sampling pump at preset time intervals and detecting the concentration of hydrogen sulfide in the gas to be detected through a hydrogen sulfide gas sensor;
The processing module 2 is connected with the acquisition module and is used for judging the abnormal concentration of the hydrogen sulfide in the gas to be detected according to the first judgment condition, judging the second normal concentration of the hydrogen sulfide in the gas to be detected according to the second judgment condition and predicting the residual time when the concentration of the hydrogen sulfide in the gas to be detected reaches the abnormal concentration from the second normal concentration according to the concentration change speed of the hydrogen sulfide in the gas to be detected; the first judgment condition is that the concentration of the hydrogen sulfide is more than a preset standard concentration, and the second judgment condition is that the concentration of the hydrogen sulfide at the i-th moment is more than the concentration of the hydrogen sulfide at the i-1 th moment;
An evaluation module 3, connected to the processing module, for evaluating the concentration risk level of hydrogen sulfide in the gas to be detected according to the second normal concentration and the abnormal concentration and the remaining time from the second normal concentration to the abnormal concentration;
and the alarm module 4 is connected with the processing module and used for determining whether to alarm and alarm grades according to the concentration danger grade and sending out alarm volume of different grades according to the alarm grade.
Specifically, the device further comprises a control module 5 which is connected with the processing module and used for adjusting the rotating speed of the sampling pump according to the concentration change condition of the hydrogen sulfide in the gas to be detected and adjusting the time interval of the sampling pump for collecting the gas to be detected according to the concentration change speed of the gas to be detected.
The concentration of hydrogen sulfide in the gas is detected in real time through the acquisition module; the abnormal concentration and the second normal concentration are judged in sequence through the processing module, the accuracy of gas detection and alarm is improved, and the timeliness of gas detection and alarm is improved by predicting the residual time when the concentration of hydrogen sulfide in the gas reaches the abnormal concentration from the second normal concentration; the concentration dangerous grade of hydrogen sulfide in the gas is evaluated by the evaluation module, objective basis is provided for grading alarm, and the reliability of gas detection alarm is high; the gas detection alarm is high in accuracy by the aid of the alarm modules for hierarchical alarm. The rotating speed of the sampling pump and the time interval for collecting gas are adjusted through the control module, so that gas collection is more flexible.
Specifically, as shown in fig. 2, the collection module includes a gas collection unit 101 and a gas detection unit 102; the gas collection unit comprises a gas inlet, a gas outlet and a sampling pump, wherein the sampling pump is a miniature gas pump and is used for sucking the gas to be detected into the gas detection unit through the gas inlet and discharging the gas to be detected through the gas outlet; a filter screen is arranged at the air inlet and is used for filtering sundries in the air;
The gas detection unit comprises a gas storage cavity and a hydrogen sulfide gas sensor, wherein the gas storage cavity is used for storing gas to be detected, which is inhaled by the gas acquisition unit, and the hydrogen sulfide gas sensor is arranged in the gas storage cavity and is used for detecting the concentration of hydrogen sulfide in the gas to be detected; the gas storage cavity is arranged between the gas inlet and the gas outlet, the gas inlet end of the gas storage cavity is connected with the gas inlet through a gas inlet pipeline, and the gas outlet end of the gas storage cavity is connected with the gas outlet through a gas outlet pipeline.
The gas is sucked into the gas detection unit through the sampling pump to detect the concentration of hydrogen sulfide in the gas, so that the gas can enter the gas detection equipment at a specific flow rate and flow rate, and the accuracy of gas detection is improved.
Specifically, as shown in fig. 3, the processing module 2 includes a first judging unit 201, a second judging unit 202, and a calculating unit 203, where the first judging unit is configured to judge an abnormal concentration of hydrogen sulfide in the gas to be detected according to a first judging condition, and includes:
The processing module receives the hydrogen sulfide concentration Rs of the gas to be detected sent by the acquisition module, the standard hydrogen sulfide concentration Rs0 is preset in the first judgment unit,
When Rs is more than or equal to 0 and less than or equal to Rs0, the first judging unit judges that the hydrogen sulfide concentration of the gas to be detected is normal;
when Rs > Rs0, the first judging unit judges that the hydrogen sulfide concentration of the gas to be detected is abnormal concentration;
Specifically, the allowable range of the standard hydrogen sulfide concentration is [0.007mg/m3,0.015mg/m3], and in this example, the standard hydrogen sulfide concentration takes a value of 0.01mg/m3.
When the first judging unit judges that the concentration of the hydrogen sulfide in the gas to be detected is the normal concentration, the second judging unit judges a second normal concentration of the hydrogen sulfide in the gas to be detected according to a second judging condition, and the method comprises the following steps:
The concentration of hydrogen sulfide in the gas to be detected is time series data, the concentration of hydrogen sulfide at the ith moment is Rs (ti), the concentration of hydrogen sulfide at the ith-1 moment is Rs (t (i-1)), rs (ti) is less than or equal to Rs0 and Rs (ti) is less than or equal to Rs0, then:
When Rs (ti) -Rs (t (i-1)). Ltoreq.0, the second judgment unit judges that the concentration Rs (ti) of hydrogen sulfide at the i-th time is the first normal concentration;
when Rs (ti) -Rs (t (i-1)) > 0, the second judgment unit judges that the concentration Rs (ti) of hydrogen sulfide at the i-th time is the second normal concentration.
Specifically, the calculating unit is configured to predict, according to a change speed of the concentration of hydrogen sulfide in the gas to be detected, a remaining time when the concentration of hydrogen sulfide in the gas to be detected reaches an abnormal concentration from a second normal concentration, and includes:
The calculation unit calculates the change speed of the concentration of the hydrogen sulfide as VRs= [ Rs (t i) -Rs (t (i-1)) ]/Δt, wherein Δt is the preset time interval, Δt= t i-t (i-1), t i is the time value of the sampling pump for collecting the gas to be detected at the ith moment, and t (i-1) is the time value of the sampling pump for collecting the gas to be detected at the ith moment;
When Rs (ti) is less than or equal to Rs0 and Rs (ti) -Rs (t (i-1)) > 0, the calculation unit calculates a remaining time for the concentration of the current hydrogen sulfide to reach an abnormal concentration from the second normal concentration as ty= [ Rs0-Rs (ti) ]/VRs.
The processing module is used for sequentially judging the normal concentration and the abnormal concentration of the hydrogen sulfide in the gas and judging the first normal concentration and the second normal concentration, so that the accuracy of gas detection and alarm can be improved; the calculation unit predicts the residual time when the concentration of the hydrogen sulfide in the gas reaches the abnormal concentration from the second normal concentration, and is beneficial to improving the timeliness of gas detection and alarm.
Specifically, when the concentration of the hydrogen sulfide in the gas to be detected is a first normal concentration, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected to be a safety level;
When the concentration of the hydrogen sulfide in the gas to be detected is the second normal concentration, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected as a preparation dangerous level; a standard remaining time ty0 for reaching the abnormal concentration from the second normal concentration is preset at the evaluation module,
When ty is larger than ty0, the evaluation module evaluates the concentration of hydrogen sulfide in the gas to be detected as a first preparation danger level;
When the ty is more than 0 and less than or equal to the ty0, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected as a second preparation danger level;
and when the concentration of the hydrogen sulfide in the gas to be detected is abnormal, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected to be a serious danger level.
Specifically, the international occupational safety and health management organization (ISO): the SO standard takes the acceptable short-term exposure time of hydrogen sulfide (H2S) to 15 minutes, and the standard remaining time in this example is 15 minutes.
And the assessment module is used for assessing the dangerous grade of the concentration according to the gas concentration and the residual time, and providing objective basis for grading alarm, so that the reliability of gas detection alarm is high.
Specifically, as shown in fig. 4, the control module 5 includes a first control unit 501 and a second control unit 502, where the first control unit is configured to adjust the rotation speed of the sampling pump according to the concentration change condition of the hydrogen sulfide in the gas to be detected, and includes:
When the concentration of the hydrogen sulfide of the gas to be detected is a first normal concentration, the first control unit sends a control instruction to the sampling pump to adjust the rotating speed of the sampling pump to be a first rotating speed; the first rotating speed n1=a1×n, wherein n is the rotating speed of the sampling pump, a1 is a first rotating speed regulating coefficient, (Rs (t i)/Rs (t (i-1))) 2 is less than or equal to a1 and less than or equal to 1;
When the hydrogen sulfide concentration of the gas to be detected is the second normal concentration, the first control unit sends a control instruction to the sampling pump to adjust the rotating speed of the sampling pump to be the second rotating speed; the second rotating speed n2=a2×n, wherein α2 is a second rotating speed regulating coefficient, and 1 < α2 is less than or equal to (Rs (ti)/Rs (t (i-1))) 2;
the second control unit is used for adjusting the time interval of the sampling pump for collecting the gas to be detected according to the change speed of the concentration of the gas to be detected,
Presetting a standard change speed VRs0 in the second control unit, wherein VRs0 > 0,
When VRs is less than or equal to 0, the second control unit does not send a control instruction to the acquisition module;
When VRs is more than 0 and less than or equal to VRs0, the second control unit sends a control instruction to the acquisition module to adjust the time interval for acquiring the gas to be detected to be a first time interval;
When VRs0 is more than VRs and less than or equal to 2 XVRs 0, the second control unit sends a control instruction to the acquisition module to adjust the time interval for acquiring the gas to be detected to be a second time interval;
When VRs is more than 2×VRs0, the second control unit sends a control instruction to the acquisition module to adjust the time interval for acquiring the gas to be detected to be a third time interval;
the first time interval is deltat1=beta1×deltat, wherein beta1 is a first time adjustment coefficient, beta0 is more than or equal to 0.8xβ0 and less than or equal to β1 < β0, and β0 is a preset standard adjustment coefficient;
the second time interval is deltat2=beta2×deltat, wherein beta2 is a second time adjustment coefficient, and 0.5xβ0 is less than or equal to β2 and less than 0.8xβ0;
The third time interval is Δt3=β3×Δt, where β3 is a third time adjustment coefficient, and 0.1×β0 is equal to or less than β3 and less than 0.5×β0.
Specifically, the standard change rate of the concentration of hydrogen sulfide in air is in the range of [0.012-0.02] mg/m 3. H, and the standard change rate of the embodiment is in the range of 0.015mg/m 3. H.
The rotating speed of the sampling pump is regulated by the first control unit according to the concentration change condition of the hydrogen sulfide in the gas, so that the rotating speed of the sampling pump is reduced when the concentration is in a reduced state, and the rotating speed of the sampling pump is increased when the concentration is in a greater state, so that the gas detection alarm device is more flexible, saves energy and electricity; the second control unit is used for adjusting the time interval of the sampling pump for collecting the gas according to the concentration change speed of the hydrogen sulfide in the gas, so that when the concentration change speed is high, the collected time interval is adjusted to be small, more detection data are obtained in a short time, and the reliability of gas detection alarm is improved.
Specifically, as shown in fig. 5, the alarm module 4 includes an alarm level determining unit 401 and an audio playing unit 402, where the alarm level determining unit is configured to determine whether to alarm and an alarm level according to the concentration hazard level; the audio playing unit is used for sending out alarm volume of different levels according to the alarm level;
when the concentration of the hydrogen sulfide in the gas to be detected is at a safety level, the alarm module determines that no alarm is sent out;
When the concentration of the hydrogen sulfide in the gas to be detected is a first preparation dangerous level, the alarm module determines that the alarm level is a first-level alarm, and the audio playing unit sends out a first alarm volume;
When the concentration of the hydrogen sulfide in the gas to be detected is a second preparation dangerous level, the alarm module determines that the alarm level is a second alarm, and the audio playing unit sends out a second alarm volume;
When the concentration of the hydrogen sulfide in the gas to be detected is a serious danger level, the alarm module determines that the alarm level is three-level alarm, and the audio playing unit sends out a third alarm volume;
The third alarm volume is larger than the second alarm volume and larger than the first alarm volume.
The alarm level is determined according to the danger level through the alarm module, so that gas detection alarm is more accurate, different equivalent alarm volumes are sent out according to the alarm level through the audio playing unit, and the timeliness of the alarm is improved.
Specifically, the gas detection device also comprises a positioning module 6 which is connected with the acquisition module and used for determining the position of the gas to be detected through a GPS positioning system.
The position of gas detection can be determined through the positioning module, and the accuracy of gas detection is improved.
Specifically, the system further comprises a man-machine interaction module 7 which is respectively connected with the acquisition module, the processing module, the evaluation module, the alarm module, the control module and the positioning module and used for displaying the concentration of hydrogen sulfide in the gas to be detected, the residual time and the danger level and receiving a data query instruction of a user.
The human-computer interaction module displays data and receives the data query instruction of the user, so that the user can know the concentration value of hydrogen sulfide in the current gas in time, the reliability of the gas detection alarm device is improved, and the gas detection alarm device is high in timeliness.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A wearable device with gas detection alarm function, comprising:
the collecting module is used for collecting gas to be detected through the sampling pump at preset time intervals and detecting the concentration of hydrogen sulfide in the gas to be detected through the hydrogen sulfide gas sensor;
The processing module is connected with the acquisition module and used for judging the abnormal concentration of the hydrogen sulfide in the gas to be detected according to the first judging condition, judging the second normal concentration of the hydrogen sulfide in the gas to be detected according to the second judging condition and predicting the residual time when the concentration of the hydrogen sulfide in the gas to be detected reaches the abnormal concentration from the second normal concentration according to the concentration change speed of the hydrogen sulfide in the gas to be detected; the first judgment condition is that the concentration of the hydrogen sulfide is more than a preset standard concentration, and the second judgment condition is that the concentration of the hydrogen sulfide at the i-th moment is more than the concentration of the hydrogen sulfide at the i-1 th moment;
the evaluation module is connected with the processing module and used for evaluating the concentration danger level of the hydrogen sulfide in the gas to be detected according to the second normal concentration, the abnormal concentration and the residual time from the second normal concentration to the abnormal concentration;
the alarm module is connected with the processing module and used for determining whether to alarm and alarm grades according to the concentration danger grade and sending different alarm volumes according to the alarm grades;
The control module is connected with the processing module and is used for adjusting the rotating speed of the sampling pump according to the concentration change condition of the hydrogen sulfide in the gas to be detected and adjusting the time interval of the sampling pump for collecting the gas to be detected according to the concentration change speed of the gas to be detected;
The control module comprises a first control unit and a second control unit, wherein the first control unit is used for adjusting the rotating speed of the sampling pump according to the concentration change condition of hydrogen sulfide in the gas to be detected, and comprises the following components:
When the concentration of the hydrogen sulfide of the gas to be detected is a first normal concentration, the first control unit sends a control instruction to the sampling pump to adjust the rotating speed of the sampling pump to be a first rotating speed; the first rotating speed n1=a1×n, wherein n is the rotating speed of the sampling pump, alpha 1 is a first rotating speed regulating coefficient, (Rs (ti)/Rs (t (i-1))) 2 is less than or equal to alpha 1 and less than or equal to 1;
When the hydrogen sulfide concentration of the gas to be detected is the second normal concentration, the first control unit sends a control instruction to the sampling pump to adjust the rotating speed of the sampling pump to be the second rotating speed; the second rotating speed n2=a2×n, wherein α2 is a second rotating speed regulating coefficient, and 1 < α2 is less than or equal to (Rs (ti)/Rs (t (i-1))) 2;
the second control unit is used for adjusting the time interval of the sampling pump for collecting the gas to be detected according to the change speed of the concentration of the gas to be detected,
Presetting a standard change speed VRs0 in the second control unit, wherein VRs0 > 0,
When VRs is less than or equal to 0, the second control unit does not send a control instruction to the acquisition module;
When VRs is more than 0 and less than or equal to VRs0, the second control unit sends a control instruction to the acquisition module to adjust the time interval for acquiring the gas to be detected to be a first time interval;
When VRs0 is more than VRs and less than or equal to 2 XVRs 0, the second control unit sends a control instruction to the acquisition module to adjust the time interval for acquiring the gas to be detected to be a second time interval;
When VRs is more than 2×VRs0, the second control unit sends a control instruction to the acquisition module to adjust the time interval for acquiring the gas to be detected to be a third time interval;
The first time interval is deltat1=beta1×deltat, wherein beta1 is a first time adjustment coefficient, beta0 is more than or equal to 0.8xβ0 and less than or equal to β1 < β0, and β0 is a preset standard adjustment coefficient;
the second time interval is deltat2=beta2×deltat, wherein beta2 is a second time adjustment coefficient, and 0.5xβ0 is less than or equal to β2 and less than 0.8xβ0;
the third time interval is Δt3=β3×Δt, where β3 is a third time adjustment coefficient, and 0.1×β0 is equal to or less than β3 and less than 0.5×β0.
2. The wearable device with gas detection alarm function according to claim 1, wherein the acquisition module comprises a gas acquisition unit and a gas detection unit; the gas collection unit comprises a gas inlet, a gas outlet and a sampling pump, wherein the sampling pump is a miniature gas pump and is used for sucking the gas to be detected into the gas detection unit through the gas inlet and discharging the gas to be detected through the gas outlet; a filter screen is arranged at the air inlet and is used for filtering sundries in the air;
The gas detection unit comprises a gas storage cavity and a hydrogen sulfide gas sensor, wherein the gas storage cavity is used for storing gas to be detected, which is inhaled by the gas acquisition unit, and the hydrogen sulfide gas sensor is arranged in the gas storage cavity and is used for detecting the concentration of hydrogen sulfide in the gas to be detected; the gas storage cavity is arranged between the gas inlet and the gas outlet, the gas inlet end of the gas storage cavity is connected with the gas inlet through a gas inlet pipeline, and the gas outlet end of the gas storage cavity is connected with the gas outlet through a gas outlet pipeline.
3. The wearable device with a gas detection alarm function according to claim 2, wherein the processing module includes a first judging unit, a second judging unit, and a calculating unit, wherein the first judging unit is configured to judge an abnormal concentration of hydrogen sulfide in the gas to be detected according to a first judging condition, and includes:
The processing module receives the hydrogen sulfide concentration Rs of the gas to be detected sent by the acquisition module, the standard hydrogen sulfide concentration Rs0 is preset in the first judgment unit,
When Rs is more than or equal to 0 and less than or equal to Rs0, the first judging unit judges that the hydrogen sulfide concentration of the gas to be detected is normal;
when Rs > Rs0, the first judging unit judges that the hydrogen sulfide concentration of the gas to be detected is abnormal concentration;
when the first judging unit judges that the concentration of the hydrogen sulfide in the gas to be detected is the normal concentration, the second judging unit judges a second normal concentration of the hydrogen sulfide in the gas to be detected according to a second judging condition, and the method comprises the following steps:
The concentration of hydrogen sulfide in the gas to be detected is time series data, the concentration of hydrogen sulfide at the ith moment is Rs (ti), the concentration of hydrogen sulfide at the ith-1 moment is Rs (t (i-1)), rs (ti) is less than or equal to Rs0 and Rs (ti) is less than or equal to Rs0, then:
When Rs (ti) -Rs (t (i-1)). Ltoreq.0, the second judgment unit judges that the concentration Rs (ti) of hydrogen sulfide at the i-th time is the first normal concentration;
when Rs (ti) -Rs (t (i-1)) > 0, the second judgment unit judges that the concentration Rs (ti) of hydrogen sulfide at the i-th time is the second normal concentration.
4. The wearable device with a gas detection alarm function according to claim 3, wherein the calculation unit for predicting a remaining time for the concentration of hydrogen sulfide in the gas to be detected to reach an abnormal concentration from a second normal concentration according to a change speed of the concentration of hydrogen sulfide in the gas to be detected, comprises:
The calculation unit calculates the change speed of the concentration of the hydrogen sulfide as VRs= [ Rs (ti) -Rs (t (i-1)) ]/Δt, wherein Δt is the preset time interval, Δt=ti-t (i-1), ti is the time value of the sampling pump for collecting the gas to be detected at the ith moment, and t (i-1) is the time value of the sampling pump for collecting the gas to be detected at the ith moment;
When Rs (ti) is less than or equal to Rs0 and Rs (ti) -Rs (t (i-1)) > 0, the calculation unit calculates the remaining time for the current concentration of hydrogen sulfide to reach an abnormal concentration from the second normal concentration as ty= [ Rs0-Rs (ti) ]/VRs.
5. The wearable device with a gas detection alarm function according to claim 4, wherein the evaluation module evaluates the concentration of hydrogen sulfide in the gas to be detected to be a safety level when the concentration of hydrogen sulfide in the gas to be detected is a first normal concentration;
When the concentration of the hydrogen sulfide in the gas to be detected is the second normal concentration, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected as a preparation dangerous level; a standard remaining time ty0 for reaching the abnormal concentration from the second normal concentration is preset at the evaluation module,
When ty is larger than ty0, the evaluation module evaluates the concentration of hydrogen sulfide in the gas to be detected as a first preparation danger level;
When the ty is more than 0 and less than or equal to the ty0, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected as a second preparation danger level;
and when the concentration of the hydrogen sulfide in the gas to be detected is abnormal, the evaluation module evaluates the concentration of the hydrogen sulfide in the gas to be detected to be a serious danger level.
6. The wearable device with gas detection alarm function according to claim 5, wherein the alarm module comprises an alarm level determining unit and an audio playing unit, wherein the alarm level determining unit is configured to determine whether to alarm and an alarm level according to the concentration hazard level; the audio playing unit is used for sending out alarm volume of different levels according to the alarm level;
when the concentration of the hydrogen sulfide in the gas to be detected is at a safety level, the alarm module determines that no alarm is sent out;
When the concentration of the hydrogen sulfide in the gas to be detected is a first preparation dangerous level, the alarm module determines that the alarm level is a first-level alarm, and the audio playing unit sends out a first alarm volume;
When the concentration of the hydrogen sulfide in the gas to be detected is a second preparation dangerous level, the alarm module determines that the alarm level is a second alarm, and the audio playing unit sends out a second alarm volume;
When the concentration of the hydrogen sulfide in the gas to be detected is a serious danger level, the alarm module determines that the alarm level is three-level alarm, and the audio playing unit sends out a third alarm volume;
The third alarm volume is larger than the second alarm volume and larger than the first alarm volume.
7. The wearable device with gas detection alarm function according to claim 6, further comprising a positioning module connected to the acquisition module for determining the position of the gas to be detected by a GPS positioning system.
8. The wearable device with the gas detection alarm function according to claim 7, further comprising a man-machine interaction module respectively connected with the acquisition module, the processing module, the evaluation module, the alarm module, the control module and the positioning module for displaying the concentration of hydrogen sulfide in the gas to be detected, the remaining time and the hazard level, and receiving a data query instruction of a user.
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