CN110095570A - A kind of laboratory safety early warning system and method - Google Patents
A kind of laboratory safety early warning system and method Download PDFInfo
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- CN110095570A CN110095570A CN201910259046.8A CN201910259046A CN110095570A CN 110095570 A CN110095570 A CN 110095570A CN 201910259046 A CN201910259046 A CN 201910259046A CN 110095570 A CN110095570 A CN 110095570A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/06—Investigating concentration of particle suspensions
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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
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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
-
- 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
-
- 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
-
- 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
- G08B21/20—Status alarms responsive to moisture
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
Abstract
The invention discloses a kind of laboratory safety early warning system and methods.The system includes administrative center and the monitoring system that each laboratory is arranged in, monitoring system includes control device, human inductor, camera, Temperature Humidity Sensor, Smoke Detection module and several gas-detecting devices that different location in laboratory is set, control device includes controller, alarm module, display screen and wireless communication module, gas-detecting device includes microprocessor and acquisition device, acquisition device includes data acquisition card, first gas chamber and closed second gas chamber, first gas sensor array is equipped in first gas chamber, first gas chamber is equipped with the first air inlet and venthole, second gas sensor array is equipped in second gas chamber, it filled with temperature is 25 DEG C in second gas chamber, the air of standard atmospheric pressure.The present invention can in time in test experience room dangerous situation, and alarm is issued when occurring dangerous, the personal safety of operator in battle support laboratory.
Description
Technical field
The present invention relates to laboratory safety technical field more particularly to a kind of laboratory safety early warning systems and method.
Background technique
Specialized laboratory has property concentration, technology-intensive, risk Relatively centralized, structure of personnel's complexity and highly qualified professional
The features such as concentration, therefore university laboratory safety management is a complicated system engineering, including fire prevention, gas defence, anti-pollution etc..
Laboratory safety accidents are high-incidence, and great personal injury accident emerges one after another, therefore, it is necessary to one kind when laboratory occurs dangerous energy
Timely pre-warning system is reached, the personal safety of operator in battle support laboratory.
Summary of the invention
The present invention to solve the above-mentioned problems, provides a kind of laboratory safety early warning system and method, can be timely
Whether temperature and humidity in test experience room is abnormal, fire whether occurs, leaks with the presence or absence of toxic and harmful gas, and is endangering
Alarm is issued when dangerous, the personal safety of operator in battle support laboratory.
To solve the above-mentioned problems, the present invention is achieved by the following scheme:
A kind of laboratory safety early warning system of the invention, including administrative center and the monitoring system that each laboratory is arranged in
System, the monitoring system include control device, in test experience room whether someone human inductor, in acquisition laboratory
The camera of interior image, for the Temperature Humidity Sensor of temperature and humidity in test experience room, for smokescope in test experience room
Smoke Detection module and several gas-detecting devices of different location in laboratory are set, the control device includes
Controller, alarm module, display screen and wireless communication module, the gas-detecting device include microprocessor and acquisition device,
The acquisition device includes data acquisition card, the first gas chamber and closed second gas chamber, is equipped with the first gas in first gas chamber
Body sensor array, first gas chamber are equipped with the first air inlet and venthole, are equipped with second gas in second gas chamber
Sensor array, is the air of 25 DEG C, standard atmospheric pressure filled with temperature in second gas chamber, the data acquisition card respectively with
First gas sensor array, second gas sensor array, microprocessor electrical connection, the controller respectively with human body sensing
Device, camera, Temperature Humidity Sensor, Smoke Detection module, microprocessor, alarm module, display screen and wireless communication module electricity
Connection, the wireless communication module are wirelessly connected by wireless network and administrative center.
In the present solution, monitoring system tests indoor field condition by camera head monitor, pass through Temperature Humidity Sensor
Whether the indoor temperature and humidity situation of monitoring experiment is more than setting value by smokescope in Smoke Detection module test experience room,
By whether there is hazardous gas spillage in gas-detecting device test experience room, when temperature and humidity exception or smokescope are more than to set
Definite value or when there is hazardous gas spillage, controller controls alarm module alarm, and module sends alarm signal by wireless communication
Cease administrative center.
When gas-detecting device is detected, indoor gas is tested from the first air inlet and enters the first gas chamber, the first gas
Body sensor array is for detecting toxic and harmful gas, the signal that data acquisition card acquisition first gas sensor array detects
And it is sent to microprocessor, the toxic and harmful gas type and concentration of laboratory internal leakage are obtained after microprocessor analysis, and will
As a result it is sent to controller.
In order to improve detection accuracy, the signal of second gas sensor array detection is also provided with as reference signal.The
Two gas sensor array working environments be it is closed, working environment be 25 DEG C of temperature, standard atmospheric pressure air, base is provided
Quasi- response reference.
Human inductor in test experience room whether someone, as someone in laboratory, the indoor detection of the experiment
Whether the system real-time detection laboratory there is hazardous gas spillage, as laboratory nobody, the gas detection in the laboratory
Whether device once there is hazardous gas spillage at interval of the time detection of setting, saves the energy.
Preferably, a kind of laboratory safety early warning system further includes for the intelligent whole of safety and patrol personnel carrying
End, the intelligent terminal can be wirelessly communicated with administrative center.When administrative center receives the warning message of monitoring system transmission
Afterwards, administrative center sends warning message to the intelligent terminal of safety and patrol personnel, and safety and patrol personnel is notified to go the experiment in time
Room processing.
Preferably, the intelligent terminal is equipped with RFID label tag, it is stored in the RFID label tag with place intelligence eventually
Hold corresponding ID number, the monitoring system further includes that the RFID card reader on laboratory doorway is arranged in, the RFID card reader with
Controller electrical connection.
After the intelligent terminal of safety and patrol personnel receives the warning message of administrative center's transmission, rushes to and dangerous reality occur
Room is tested, the RFID label tag on intelligent terminal is put at RFID card reader and reads information for RFID card reader, RFID card reader is read
The ID number stored in the RFID label tag is taken, and sends it to controller, module is sent it to controller by wireless communication
To administrative center, administrative center determines the safety and patrol personnel for rushing to the laboratory, and record storage according to the ID number.
Preferably, the controller is also electrically connected with the ventilating system in laboratory.It is real where monitoring system detects
When testing room and hazardous gas spillage occur, the ventilating operation in the laboratory is controlled, indoor gas will be tested and be discharged to experiment
It is outdoor.
Preferably, the first gas sensor array is identical with second gas sensor array structure, including sensing
Device interface card, sensor sensing film and multiple gas sensors, the sensor sensing membrane cover is in sensor interface circuitry
Cavity is formed on plate and with sensor interface circuitry plate, the gas sensor is arranged in cavity and and sensor interface circuitry
Plate connection, the acquisition device further includes the impedance spectrometer for detection sensor sensitivity membrane impedance, the impedance spectrum inspection
Instrument is surveyed to be electrically connected with microprocessor.
Sensor sensing film can remove the disturbing factors such as dust in air, impurity particle, vapor.Meanwhile the sensitivity
Film detects the impedance variations of its own after absorbing vapor, sets up relevance with air humidity, is become according to its impedance
Allelopathic knows air humidity, provides humidity correcting information for the detection of sensor array.
Preferably, the multiple gas sensor includes MQ-135 sensor, ME3-C7H8 sensor, ME4-C6H6 biography
Sensor, ME-C8H10 sensor, ME2-CH2O sensor, MQK3 sensor.
MQ-135 sensor is for detecting ammonia, sulfide, benzene series steam；ME3-C7H8 sensor is used to detect toluene,
ME4-C6H6 sensor is for detecting benzene, and ME-C8H10 sensor is for detecting paraxylene, and ME2-CH2O sensor is for examining
Formaldehyde is surveyed, MQK3 sensor is for detecting ethyl alcohol.
Preferably, the acquisition device further includes noble gas source, the first air pump and the second air pump, first gas
The second air inlet is additionally provided on room, the gas outlet of first air pump is connect with the first air inlet, the noble gas source with
The air inlet of second air pump connects, and the gas outlet of second air pump is connect with the second air inlet, the microprocessor respectively with
First air pump and the electrical connection of the second air pump.
It when detection, first controls the first air pump inert gas is filled in the first gas chamber and clean, so that first gas passes
Position of the response baseline restorer of sensor array to 0, avoids error caused by sensor response baseline drift, then controls the
One air pump stops working, and ambient atmos are filled in the first gas chamber and detect for first gas sensor array by the second air pump of control.
Preferably, the monitoring system further includes the baroceptor for air pressure in test experience room, the air pressure
Sensor is electrically connected with the controller.Whether baroceptor is abnormal for air pressure in test experience room, if abnormal, alarm module
Issue alarm.
A kind of laboratory safety method for early warning of the invention, for a kind of above-mentioned laboratory safety early warning system, including
Following steps:
Indoor field condition is tested by camera head monitor, passes through the indoor temperature and humidity of Temperature Humidity Sensor monitoring experiment
Whether situation is more than setting value by smokescope in Smoke Detection module test experience room, is detected by gas-detecting device
Whether there is hazardous gas spillage in laboratory, when temperature and humidity exception or smokescope are more than setting value or hazardous gas occur and let out
When leakage, controller controls alarm module alarm, and module sends warning message to administrative center, administrative center by wireless communication
It is sent information to the intelligent terminal of safety and patrol personnel, notice safety and patrol personnel remove the laboratory treatment in time；
Gas-detecting device detects whether that the method for hazardous gas spillage occur is as follows:
S1: the detection data of acquisition first gas sensor array, the detection data of second gas sensor array, by the
The response of each gas sensor in one gas sensor array and the same gas in second gas sensor array pass
The response of sensor is handled, and the corresponding sensor response of each gas sensor in first gas sensor array is obtained
Ratio of momentum RAT；
Calculate the formula of the corresponding sensor response ratio of momentum RAT of some gas sensor in first gas sensor array
It is as follows:
Wherein, RES11 is the response of the gas sensor of first gas sensor array, and RES01 is second gas
The response of the same gas sensor of sensor array,
RAT=0 indicates that the gas sensor is in nought state,
0 < RAT≤0.25 indicates that the gas sensor is in low nondeterministic statement,
0.25 < RAT≤0.55 indicates that the gas sensor is in the state of determination,
0.55 < RAT≤0.8 indicates that the gas sensor is in high nondeterministic statement,
0.8 < RAT≤1 indicates that the gas sensor is in abnormality；
S2: statistics is in the gas sensor quantity of low nondeterministic statement and high nondeterministic statement, if in low not true
The gas sensor quantity for determining state and high nondeterministic statement accounts for all gas number of sensors in first gas sensor array
Ratio be more than 50%, then follow the steps S1 and detect again, it is no to then follow the steps S3；
S3: statistics is in the gas sensor quantity of abnormality, if being in the gas sensor quantity of abnormality
The ratio for accounting for all gas number of sensors in first gas sensor array is more than 20%, then judges first gas sensor array
Column break down, no to then follow the steps S4；
S4: gas sensor of the statistics in the state of determination, the gas sensor gas detected in the state of determination
Type is exactly laboratory leaked gas type.
Preferably, gas-detecting device detects whether that the method for hazardous gas spillage occur is further comprising the steps of:
S5: gas leakage concentration detected by the gas sensor each in the state of determination is calculated；
The method for calculating gas leakage concentration detected by the gas sensor that some is in the state of determination is as follows:
The data of the gas sensor detection for being in the state of determination are inputted into following formula:
Wherein, as follows for the induced function of the x with n component:
Wherein, V (x) is non-linear symmetrical potential function, and φ (t) is inducement signal, auto-correlation function are as follows:α is cyclical signal intensity, f0It is default frequencies, D is inducement signal intensity, μnIt is variable
xnPotential energy reference quantity, λ is initial phase, and potential energy of system height is
It is derived by formula (1), formula (2):
Under conditions of α=D=0, system existsThere are two stable states at place, under zero noise states, system transition
Critical value is aboutUnder the action of noise, even if α is less than system Transition Critical value, particle still can be at two
Transition between stable state, the confidence coefficient T of transitionxAre as follows:
According to formula (3), using inducement signal intensity D as abscissa, confidence coefficient TxRectangular coordinate system is established for ordinate,
Confidence coefficient curve is drawn, determines the maximum value in confidence coefficient curve, maximum value or so two will be located on confidence coefficient curve
The Y value of side is the point of maximum value 90% as supplemental characteristic point, and doing respectively to X-axis for the two supplemental characteristic points is vertical
Line using the rectangular area of the two vertical lines, two supplemental characteristic point lines and X-axis envelope as characteristic value, and calculates the spy
Value indicative finds out correspondence from the corresponding characteristic value of the pre-set gas sensor-gas concentration table according to this feature value
Gas concentration, to obtain the gas concentration for the correspondence gas leakage that the gas sensor detects.
The beneficial effects of the present invention are: can whether the temperature and humidity in test experience room abnormal in time, fire whether occurs,
It is leaked with the presence or absence of toxic and harmful gas, and issues alarm when occurring dangerous, the person peace of operator in battle support laboratory
Entirely.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment；
Fig. 2 is the partial structural diagram of gas sensor array；
Fig. 3 is the structural schematic diagram of sensor interface circuitry plate；
Fig. 4 is a kind of confidence coefficient curve synoptic diagram.
In figure: 1, administrative center, 2, human inductor, 3, camera, 4, Temperature Humidity Sensor, 5, Smoke Detection module,
6, controller, 7, alarm module, 8, display screen, 9, wireless communication module, 10, microprocessor, 11, data acquisition card, 12, first
Gas chamber, the 13, second gas chamber, 14, first gas sensor array, 15, second gas sensor array, 16, intelligent terminal, 17,
RFID card reader, 18, ventilating system, 19, noble gas source, the 20, first air pump, the 21, second air pump, 22, baroceptor,
23, sensor interface circuitry plate, 24, sensor sensing film, 25, gas sensor, 26, impedance spectrometer.
Specific embodiment
Below with reference to the embodiments and with reference to the accompanying drawing the technical solutions of the present invention will be further described.
Embodiment: a kind of laboratory safety early warning system of the present embodiment, as shown in Figure 1, Figure 2, Figure 3 shows, including in management
Whether the heart (1) and the monitoring system that each laboratory is arranged in, monitoring system include control device, for having in test experience room
The human inductor (2) of people, in acquisition experiment off-the-air picture camera (3), in test experience room temperature and humidity it is warm and humid
Spend sensor (4), the Smoke Detection module (5) for smokescope in test experience room and the setting different positions in laboratory
Several gas-detecting devices set, control device include controller (6), alarm module (7), display screen (8) and wireless communication
Module (9), gas-detecting device include microprocessor (10) and acquisition device, and acquisition device includes data acquisition card (11),
One gas chamber (12), closed second gas chamber (13), noble gas source (19), the first air pump (20) and the second air pump (21), the
First gas sensor array (14) are equipped in one gas chamber (12), the first gas chamber (12) is equipped with the first air inlet, the second air inlet
The gas outlet of hole and venthole, the first air pump (20) is connect with the first air inlet, noble gas source (19) and the second air pump
(21) air inlet connection, the gas outlet of the second air pump (21) are connect with the second air inlet, and second is equipped in the second gas chamber (13)
Gas sensor array (15) is the air of 25 DEG C, standard atmospheric pressure, data acquisition card filled with temperature in the second gas chamber (13)
(11) it is electrically connected respectively with first gas sensor array (14), second gas sensor array (15), microprocessor (10), it is micro-
Processor (10) is also electrically connected with the first air pump (20) and the second air pump (21) respectively, controller (6) respectively with human inductor
(2), camera (3), Temperature Humidity Sensor (4), Smoke Detection module (5), microprocessor (10), alarm module (7), display screen
(8) it is wirelessly connected with wireless communication module (9) electrical connection, wireless communication module (9) by wireless network and administrative center (1).
In the present solution, monitoring system tests indoor field condition by camera head monitor, pass through Temperature Humidity Sensor
Whether the indoor temperature and humidity situation of monitoring experiment is more than setting value by smokescope in Smoke Detection module test experience room,
By whether there is hazardous gas spillage in gas-detecting device test experience room, when temperature and humidity exception or smokescope are more than to set
Definite value or when there is hazardous gas spillage, controller controls alarm module alarm, and module sends alarm signal by wireless communication
Cease administrative center.
When gas-detecting device is detected, first control the first air pump inert gas is filled in the first gas chamber carry out it is clear
It washes, so that position of the response baseline restorer of first gas sensor array to 0, avoids caused by sensor response baseline drift
Error, then control the first air pump and stop working, ambient atmos are filled in the first gas chamber for the first gas by the second air pump of control
Body sensor array detection.First gas sensor array acquires the first gas for detecting toxic and harmful gas, data acquisition card
Body sensor array detection to signal and be sent to microprocessor, the toxic of laboratory internal leakage is obtained after microprocessor analysis
Pernicious gas type and concentration, and send the result to controller.
In order to improve detection accuracy, the signal of second gas sensor array detection is also provided with as reference signal.The
Two gas sensor array working environments be it is closed, working environment be 25 DEG C of temperature, standard atmospheric pressure air, base is provided
Quasi- response reference.
Human inductor in test experience room whether someone, as someone in laboratory, the indoor detection of the experiment
Whether the system real-time detection laboratory there is hazardous gas spillage, as laboratory nobody, the gas detection in the laboratory
Whether device once there is hazardous gas spillage at interval of the time detection of setting, saves the energy.
Laboratory safety early warning system further includes the intelligent terminal 16 carried for safety and patrol personnel, and intelligent terminal 16 can
It is wirelessly communicated with administrative center 1.Intelligent terminal 16 is equipped with RFID label tag, is stored with and place intelligent terminal 16 in RFID label tag
Corresponding ID number, monitoring system further include that the RFID card reader 17 on laboratory doorway is arranged in, RFID card reader 17 and controller 6
Electrical connection.
After administrative center receives the warning message of monitoring system transmission, administrative center sends warning message and patrols to safety
Depending on the intelligent terminal of personnel, safety and patrol personnel are notified to remove the laboratory treatment in time, it is dangerous that safety and patrol personnel rush to appearance
Laboratory after, by the RFID label tag on intelligent terminal be put at RFID card reader for RFID card reader read information, RFID read
Card device reads the ID number stored in the RFID label tag, and sends it to controller, controller by wireless communication module by its
It is sent to administrative center, administrative center determines the safety and patrol personnel for rushing to the laboratory, and record storage according to the ID number.
Controller 6 is also electrically connected with the ventilating system 18 in laboratory.It endangers in the laboratory where monitoring system detects
When dangerous gas leaks, the ventilating operation in the laboratory is controlled, indoor gas will be tested and be discharged to outside laboratory.
First gas sensor array 14 is identical with 15 structure of second gas sensor array, including sensor interface circuitry
Plate 23, sensor sensing film 24 and six gas sensors 25, sensor sensing film 24 cover on sensor interface circuitry plate 23
And with sensor interface circuitry plate 23 formed cavity, gas sensor 25 be arranged in cavity and with sensor interface circuitry plate 23
Connection, acquisition device further includes the impedance spectrometer 26 for 24 impedance of detection sensor sensitive membrane, impedance spectrometer 26
It is electrically connected with microprocessor 10.Six gas sensors include MQ-135 sensor, ME3-C7H8 sensor, ME4-C6H6 sensing
Device, ME-C8H10 sensor, ME2-CH2O sensor, MQK3 sensor.
Sensor sensing film can remove the disturbing factors such as dust in air, impurity particle, vapor.Meanwhile the sensitivity
Film detects the impedance variations of its own after absorbing vapor, sets up relevance with air humidity, is become according to its impedance
Allelopathic knows air humidity, provides humidity correcting information for the detection of sensor array.
MQ-135 sensor is for detecting ammonia, sulfide, benzene series steam；ME3-C7H8 sensor is used to detect toluene,
ME4-C6H6 sensor is for detecting benzene, and ME-C8H10 sensor is for detecting paraxylene, and ME2-CH2O sensor is for examining
Formaldehyde is surveyed, MQK3 sensor is for detecting ethyl alcohol.
Monitoring system further includes the baroceptor 22 for air pressure in test experience room, baroceptor 22 and controller
6 electrical connections.Whether baroceptor is abnormal for air pressure in test experience room, if abnormal, alarm module issues alarm.
A kind of laboratory safety method for early warning of the present embodiment, for a kind of above-mentioned laboratory safety early warning system, packet
Include following steps:
Indoor field condition is tested by camera head monitor, passes through the indoor temperature and humidity of Temperature Humidity Sensor monitoring experiment
Whether situation is more than setting value by smokescope in Smoke Detection module test experience room, is detected by gas-detecting device
Whether there is hazardous gas spillage in laboratory, it is whether abnormal by air pressure in baroceptor test experience room, work as temperature and humidity
When abnormal, smokescope is more than setting value, hazardous gas spillage or pressure abnormity occurs, controller controls alarm module alarm,
And module sends warning message to administrative center by wireless communication, administrative center sends warning message to safety and patrol personnel's
Intelligent terminal, notice safety and patrol personnel remove the laboratory treatment in time；
Gas-detecting device detects whether that the method for hazardous gas spillage occur is as follows:
S1: the detection data of acquisition first gas sensor array, the detection data of second gas sensor array, by the
The response of each gas sensor in one gas sensor array and the same gas in second gas sensor array pass
The response of sensor is handled, and the corresponding sensor response of each gas sensor in first gas sensor array is obtained
Ratio of momentum RAT；
Calculate the formula of the corresponding sensor response ratio of momentum RAT of some gas sensor in first gas sensor array
It is as follows:
Wherein, RES11 is the response of the gas sensor of first gas sensor array, and RES01 is second gas
The response of the same gas sensor of sensor array,
RAT=0 indicates that the gas sensor is in nought state,
0 < RAT≤0.25 indicates that the gas sensor is in low nondeterministic statement,
0.25 < RAT≤0.55 indicates that the gas sensor is in the state of determination,
0.55 < RAT≤0.8 indicates that the gas sensor is in high nondeterministic statement,
0.8 < RAT≤1 indicates that the gas sensor is in abnormality；
S2: statistics is in the gas sensor quantity of low nondeterministic statement and high nondeterministic statement, if in low not true
The gas sensor quantity for determining state and high nondeterministic statement accounts for all gas number of sensors in first gas sensor array
Ratio be more than 50%, then follow the steps S1 and detect again, it is no to then follow the steps S3；
S3: statistics is in the gas sensor quantity of abnormality, if being in the gas sensor quantity of abnormality
The ratio for accounting for all gas number of sensors in first gas sensor array is more than 20%, then judges first gas sensor array
Column break down, no to then follow the steps S4；
S4: gas sensor of the statistics in the state of determination, the gas sensor gas detected in the state of determination
Type is exactly laboratory leaked gas type；
S5: gas leakage concentration detected by the gas sensor each in the state of determination is calculated；
The method for calculating gas leakage concentration detected by the gas sensor that some is in the state of determination is as follows:
The data of the gas sensor detection for being in the state of determination are inputted into following formula:
Wherein, as follows for the induced function of the x with n component:
Wherein, V (x) is non-linear symmetrical potential function, and φ (t) is inducement signal, auto-correlation function are as follows:α is cyclical signal intensity, f0It is default frequencies, D is inducement signal intensity, μnIt is variable xn
Potential energy reference quantity (each x-component is corresponding with a μ), λ is initial phase (value be 0.45~0.6), and potential energy of system is high
Degree is
It is derived by formula (1), formula (2):
Under conditions of α=D=0, system existsThere are two stable states at place, under zero noise states, system transition
Critical value is aboutUnder the action of noise, even if α is less than system Transition Critical value, particle still can be at two
Transition between stable state, the confidence coefficient T of transitionxAre as follows:
According to formula (3), using inducement signal intensity D as abscissa, confidence coefficient Tx is that ordinate establishes rectangular coordinate system,
Confidence coefficient curve is drawn, determines the maximum value in confidence coefficient curve, maximum value or so two will be located on confidence coefficient curve
The Y value of side is the point of maximum value 90% as supplemental characteristic point, and doing respectively to X-axis for the two supplemental characteristic points is vertical
Line using the rectangular area of the two vertical lines, two supplemental characteristic point lines and X-axis envelope as characteristic value, and calculates the spy
Value indicative finds out correspondence from the corresponding characteristic value of the pre-set gas sensor-gas concentration table according to this feature value
Gas concentration, to obtain the gas concentration for the correspondence gas leakage that the gas sensor detects.Such as MQ-135 sensing
Device corresponding confidence coefficient curve in certain detection is as shown in Figure 4.
Claims (8)
1. a kind of laboratory safety early warning system, which is characterized in that including administrative center (1) and be arranged in the prison in each laboratory
Control system, the monitoring system include control device, in test experience room whether human inductor (2), the Yu Cai of someone
The camera (3) of collection experiment off-the-air picture, for the Temperature Humidity Sensor (4) of temperature and humidity in test experience room, for detecting reality
It tests the Smoke Detection module (5) of indoor smog concentration and several gas detections dress of different location in laboratory is set
It sets, the control device includes controller (6), alarm module (7), display screen (8) and wireless communication module (9), the gas
Detection device includes microprocessor (10) and acquisition device, and the acquisition device includes data acquisition card (11), the first gas chamber
(12) and closed second gas chamber (13) first gas sensor array (14), are equipped in first gas chamber (12), described the
One gas chamber (12) is equipped with the first air inlet and venthole, is equipped with second gas sensor array in second gas chamber (13)
It (15), is the air of 25 DEG C, standard atmospheric pressure filled with temperature in second gas chamber (13), the data acquisition card (11) is respectively
It is electrically connected with first gas sensor array (14), second gas sensor array (15), microprocessor (10), the controller
(6) respectively with human inductor (2), camera (3), Temperature Humidity Sensor (4), Smoke Detection module (5), microprocessor
(10), alarm module (7), display screen (8) and wireless communication module (9) electrical connection, the wireless communication module (9) pass through wireless
Network and administrative center (1) are wirelessly connected.
2. a kind of laboratory safety early warning system according to claim 1, which is characterized in that further include for safety and patrol people
The intelligent terminal (16) that member carries, the intelligent terminal (16) can wirelessly communicate with administrative center (1).
3. a kind of laboratory safety early warning system according to claim 2, which is characterized in that on the intelligent terminal (16)
Equipped with RFID label tag, ID number corresponding with place intelligent terminal (16) is stored in the RFID label tag, the monitoring system is also
RFID card reader (17) including laboratory doorway is arranged in, the RFID card reader (17) are electrically connected with controller (6).
4. a kind of laboratory safety early warning system according to claim 1, which is characterized in that the controller (6) also with
The ventilating system (18) in laboratory is electrically connected.
5. a kind of laboratory safety early warning system according to claim 1, which is characterized in that the acquisition device further includes
Noble gas source (19), the first air pump (20) and the second air pump (21) are additionally provided with the second air inlet on first gas chamber (12)
The gas outlet in hole, first air pump (20) is connect with the first air inlet, the noble gas source (19) and the second air pump
(21) air inlet connection, the gas outlet of second air pump (21) are connect with the second air inlet, the microprocessor (10) point
It is not electrically connected with the first air pump (20) and the second air pump (21).
6. a kind of laboratory safety early warning system according to claim 1, which is characterized in that the monitoring system further includes
For the baroceptor (22) of air pressure in test experience room, the baroceptor (22) is electrically connected with controller (6).
7. a kind of laboratory safety method for early warning is used for a kind of laboratory safety early warning system as claimed in claim 2, feature
It is, comprising the following steps:
Indoor field condition is tested by camera head monitor, passes through the indoor temperature and humidity feelings of Temperature Humidity Sensor monitoring experiment
Whether condition is more than setting value by smokescope in Smoke Detection module test experience room, is detected by gas-detecting device real
Test whether interior hazardous gas spillage occurs, when temperature and humidity exception or smokescope more than setting value or hazardous gas spillage occur
When, controller controls alarm module alarm, and module sends warning message to administrative center, administrative center's hair by wireless communication
Breath deliver letters to the intelligent terminal of safety and patrol personnel, safety and patrol personnel is notified to remove the laboratory treatment in time；
Gas-detecting device detects whether that the method for hazardous gas spillage occur is as follows:
S1: the detection data of acquisition first gas sensor array, the detection data of second gas sensor array, by the first gas
The response of each gas sensor in body sensor array and the same gas sensor in second gas sensor array
Response handled, obtain the corresponding sensor response momentum of each gas sensor in first gas sensor array
Compare RAT；
Calculate the formula of the corresponding sensor response ratio of momentum RAT of some gas sensor in first gas sensor array such as
Under:
Wherein, RES11 is the response of the gas sensor of first gas sensor array, and RES01 is second gas sensing
The response of the same gas sensor of device array,
RAT=0 indicates that the gas sensor is in nought state,
0 < RAT≤0.25 indicates that the gas sensor is in low nondeterministic statement,
0.25 < RAT≤0.55 indicates that the gas sensor is in the state of determination,
0.55 < RAT≤0.8 indicates that the gas sensor is in high nondeterministic statement,
0.8 < RAT≤1 indicates that the gas sensor is in abnormality；
S2: statistics is in the gas sensor quantity of low nondeterministic statement and high nondeterministic statement, if being in low uncertain shape
The gas sensor quantity of state and high nondeterministic statement accounts for the ratio of all gas number of sensors in first gas sensor array
Example thens follow the steps S1 and detects again more than 50%, no to then follow the steps S3；
S3: statistics is in the gas sensor quantity of abnormality, if the gas sensor quantity in abnormality accounts for the
The ratio of all gas number of sensors is more than 20% in one gas sensor array, then judges that first gas sensor array is listed
Existing failure, it is no to then follow the steps S4；
S4: gas sensor of the statistics in the state of determination, the gas sensor gas type detected in the state of determination
It is exactly laboratory leaked gas type.
8. a kind of laboratory safety method for early warning according to claim 7, which is characterized in that gas-detecting device, which detects, is
The no method for hazardous gas spillage occur is further comprising the steps of:
S5: gas leakage concentration detected by the gas sensor each in the state of determination is calculated；
The method for calculating gas leakage concentration detected by the gas sensor that some is in the state of determination is as follows:
The data of the gas sensor detection for being in the state of determination are inputted into following formula:
Wherein, as follows for the induced function of the x with n component:
Wherein, V (x) is non-linear symmetrical potential function, and φ (t) is inducement signal, auto-correlation function are as follows:α is cyclical signal intensity, f0It is default frequencies, D is inducement signal intensity, μnIt is variable
xnPotential energy reference quantity, λ is initial phase, and potential energy of system height is
It is derived by formula (1), formula (2):
Under conditions of α=D=0, system existsThere are two stable states at place, under zero noise states, system Transition Critical
Value is aboutUnder the action of noise, even if α is less than system Transition Critical value, particle still can be steady at two
Transition between state, the confidence coefficient T of transitionxAre as follows:
According to formula (3), using inducement signal intensity D as abscissa, confidence coefficient TxRectangular coordinate system is established for ordinate, is drawn
Confidence coefficient curve determines the maximum value in confidence coefficient curve, will be located at left and right sides of maximum value on confidence coefficient curve
Y value is the point of maximum value 90% as supplemental characteristic point, the two supplemental characteristic points do vertical line to X-axis respectively, will
The rectangular area of the two vertical lines, two supplemental characteristic point lines and X-axis envelope calculates this feature value as characteristic value,
Corresponding gas is found out from the corresponding characteristic value of the pre-set gas sensor-gas concentration table according to this feature value
Concentration, to obtain the gas concentration for the correspondence gas leakage that the gas sensor detects.
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