CN113689656A - Control method of fire alarm device - Google Patents
Control method of fire alarm device Download PDFInfo
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- CN113689656A CN113689656A CN202111244038.XA CN202111244038A CN113689656A CN 113689656 A CN113689656 A CN 113689656A CN 202111244038 A CN202111244038 A CN 202111244038A CN 113689656 A CN113689656 A CN 113689656A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000010365 information processing Effects 0.000 claims abstract description 53
- 238000012545 processing Methods 0.000 claims abstract description 42
- 239000000779 smoke Substances 0.000 claims abstract description 39
- 230000002159 abnormal effect Effects 0.000 claims description 10
- 238000004458 analytical method Methods 0.000 claims description 10
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- 238000013528 artificial neural network Methods 0.000 claims description 7
- 238000001514 detection method Methods 0.000 abstract description 33
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 24
- 239000003345 natural gas Substances 0.000 description 12
- 238000002955 isolation Methods 0.000 description 9
- 238000010411 cooking Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
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- 229910052742 iron Inorganic materials 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
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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
- G08B17/06—Electric actuation of the alarm, e.g. using a thermally-operated switch
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/12—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions
- G08B17/125—Actuation by presence of radiation or particles, e.g. of infrared radiation or of ions by using a video camera to detect fire or smoke
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Abstract
According to the control method of the fire alarm device, the information processing module judges whether the received smoke concentration data and the received combustible gas concentration data exceed corresponding threshold values or not, whether the received environment temperature data and the received infrared temperature data exceed the corresponding threshold values or not, and if any data exceed the corresponding threshold values, the CCD camera is started to carry out image acquisition, and the detected data are converted into electric signals to be transmitted to the information processing module. According to the method, a multi-sensor working mode in different situations and a segmented judgment method are adopted, a temperature sensor, a smoke sensor and an infrared temperature sensor are firstly utilized for quick rough detection, and if a problem exists, then a CCD camera is used for carrying out image detailed detection, so that the detection comprehensiveness is improved, the detection efficiency and quality are ensured, the processing and running time of an information processing module is shortened, the instantaneity is improved, and the system life is prolonged. The system can run with low power consumption under normal conditions, and can run with short-time overclocking under the condition of processing complex programs or multiple tasks.
Description
Technical Field
The invention relates to the technical field of fire smoke detection alarm equipment, in particular to a control method of a fire alarm device.
Background
With the continuous improvement of economic level and industrial level, the quantity of various household appliances and industrial equipment is rapidly increased, the electric equipment is also continuously enlarged, the fire safety hidden dangers of various production workshops are increased, and fire accidents are frequent. Among many fire accidents, the probability of fire occurring in various chemical plants, oil plants, natural gas plants, and kitchen natural gas stoves is higher. Most chemical plant fires are easy to generate acid gas and have high toxicity and corrosiveness. The natural gas cooking bench in the kitchen is easy to generate dry burning or fire caused by gas leakage, the natural gas factory is easy to generate gas leakage, particularly in the area where the natural gas leakage is easy to generate, the natural gas concentration in the air after the natural gas leakage is easy to cause the fire, if emergency measures are not taken in the first time, such as cutting off a gas source and fire extinguishing measures, property loss can be caused slightly, explosion can be caused seriously, casualties can be caused, and the consequence is unreasonable.
Therefore, the attention on various fires is continuously deepened, and in order to prevent the fires, fire detection alarms are strictly required to be installed in areas such as chemical plants, natural gas plants, kitchen natural gas cooking benches and the like, so that the fire monitoring efficiency is improved.
Although some fire detection alarm devices exist in the prior art, most fire detection alarm devices only carry out data detection through an infrared temperature measuring device, and emergency measures are taken when a temperature sensor detects abnormal temperature, so that the detection comprehensiveness is reduced, and the situation of misjudgment or missed judgment is easy to occur. If the fire is missed, it means that first aid measures cannot be taken right before the fire begins, and the fire cannot be extinguished at the beginning. If misjudged, it means that there is no danger and emergency measures are taken, causing unnecessary trouble. And the sensor does not work in a time-sharing manner, so that the processing and running time of a CPU (Central processing Unit) is increased, the instantaneity is reduced, and the service life of the system is prolonged.
Therefore, in view of the current situation, it is urgently needed to design and produce a control method of a fire alarm device, so as to solve the problems that in the prior art, no effective control method of the fire alarm device exists, the detection comprehensiveness is low, the misjudgment or the judgment omission occurs easily, a sensor does not work in a time-sharing manner to acquire information, the CPU processing and running time is long, and the instantaneity and the system life are low.
Disclosure of Invention
The invention aims to provide a control method of a fire alarm device, wherein a multi-sensor adopts a situation-based working mode and a sectional judgment method, the sensor is used for quickly and roughly checking, and image careful detection is carried out if a problem exists, so that the detection comprehensiveness is improved, the detection efficiency and quality are ensured, the processing and running time of an information processing module is shortened, the instantaneity is improved, and the system life is prolonged.
The purpose of the invention is realized by the following technical scheme.
A method of controlling a fire alarm device, comprising the steps of:
s1, a timer calculates a time interval t from the last signal processing;
s2, the information processing module judges whether the time interval T is greater than or equal to a preset value T, if so, the step S3 is executed; otherwise, go to step S1;
s3, starting a smoke sensor to capture smoke concentration data and combustible gas concentration, starting the temperature sensor to collect environment temperature data, starting an infrared temperature sensor to capture infrared temperature data, judging whether the received smoke concentration data and combustible gas concentration data exceed corresponding thresholds or not by an information processing module, judging whether the received environment temperature data and infrared temperature data exceed corresponding thresholds or not, and executing a step S4 if any data exceed corresponding thresholds; otherwise, go to step S1;
s4, the information processing module judges whether the CCD camera is started, if so, the step S6 is executed, otherwise, the step S5 is executed;
s5, starting a CCD camera;
s6, the CCD camera collects images and converts the detected data into electric signals to be transmitted to the information processing module;
s7, calling an image recognition program by the information processing module, and extracting the flame form;
s8, the information processing module judges whether the flame form is abnormal, and if the flame form is abnormal, the step S9 is executed; otherwise, go to step S1;
s9, the control module transmits the processing data of the information processing module to the display control module through the communication module, displays the processing data of the information processing module through the display area, and inquires a user operation instruction through the instruction area;
s10, the control module judges whether a control instruction transmitted from the display control module is received within a preset time h, and if the control instruction is received, the step S11 is executed; otherwise, go to step S13;
s11, the control module judges whether the received control instruction is a favorite recording instruction or an automatic control instruction, and if the received control instruction is the favorite recording instruction, the step S12 is executed; if the command is an automatic control command, executing step S13;
s12, the threshold value changing unit analyzes the processing data of the information processing module, changes the control threshold value according to the analysis result, and then executes the step S7;
s13, the control module sends an instruction to the air valve closing device to control the air valve to be closed, sends an instruction to the power supply disconnecting device to control the power supply to be disconnected, sends an instruction to the alarm module to give an alarm, and sends an instruction to the fire extinguisher control device to start the fire extinguisher.
Preferably, in step S11, the threshold changing unit analyzes the processing data of the information processing module by a neural network analysis method.
Preferably, the alarm module alarms through a buzzer and/or a flashing device.
Preferably, in step S8, the display control module sends out a prompt signal through the warning area.
The invention has the beneficial effects that:
according to the control method of the fire alarm device, the smoke sensor is started to capture smoke concentration data and combustible gas concentration, the temperature sensor is started to collect environment temperature data, the infrared temperature sensor is started to capture infrared temperature data, the information processing module judges whether the received smoke concentration data and the received combustible gas concentration data exceed corresponding thresholds or not, whether the received environment temperature data and the received infrared temperature data exceed corresponding thresholds or not, and if any data exceed the corresponding thresholds, the CCD camera is started to collect images and convert the detected data into electric signals to be transmitted to the information processing module. According to the method, a multi-sensor working mode in different situations and a segmented judgment method are adopted, a temperature sensor, a smoke sensor and an infrared temperature sensor are firstly utilized for quick rough detection, and if a problem exists, then a CCD camera is used for carrying out image detailed detection, so that the detection comprehensiveness is improved, the detection efficiency and quality are ensured, the processing and running time of an information processing module is shortened, the instantaneity is improved, and the system life is prolonged. The method can also be used for processing tasks by analogy with a computer CPU (central processing unit), running with low power consumption under a normal condition, and running with short-time overclocking under the condition of processing complex programs or multiple tasks.
In addition, the control method of the fire alarm device adopts various detection devices to collect field data, can accurately and effectively monitor the fire condition, reduces the misjudgment or the misjudgment, can adopt emergency measures at the beginning stage of the fire condition, eliminates the fire condition at the initial stage, reduces the occurrence of the fire and reduces the casualties of personnel and property caused by the fire.
Drawings
FIG. 1 is a schematic structural view of a fire alarm apparatus provided in the present embodiment;
FIG. 2 is a schematic view showing a preferred structure of the fire alarm apparatus according to the present embodiment;
fig. 3 is a schematic structural diagram of an information processing module provided in the present embodiment;
FIG. 4 is a flowchart of a control method of the fire alarm apparatus according to the present embodiment;
FIG. 5 is a graph showing the relationship between the gas concentration and the power supply provided in the present embodiment.
In the figure:
1. a detection module; 2. a master control terminal; 3. an action module; 4. a display control module; 5. an alarm module; 6. a fire extinguisher;
11. a temperature-sensitive sensor; 12. a smoke sensor; 13. an infrared temperature sensor; 14. a CCD camera;
21. an information processing module; 22. a control module;
31. an air valve closing device; 32. a power supply disconnection device; 33. a fire extinguisher control device;
A. a first isolated chip; B. a second isolated chip; C. a third isolated chip; D. a fourth isolated chip; E. a fifth isolated chip; F. a sixth isolated chip; G. and a seventh isolated chip.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Device embodiment
In this embodiment, the monitoring of the fire condition of the natural gas cooking bench in the kitchen is taken as an example for description, and as shown in fig. 1 to fig. 3, the fire alarm device provided by the present embodiment includes a main control terminal 2, a detection module 1, an action module 3, an alarm module 5 and a display control module 4.
The general control terminal 2 comprises an information processing module 21 and a control module 22.
The detection module 1 comprises a temperature sensor 11, a smoke sensor 12, an infrared temperature sensor 13 and a CCD camera 14. The temperature sensor 11 is used to capture heat, that is, collect ambient temperature data. The smoke sensor 12 is used to capture smoke concentration data, including both smoke concentration data and combustible gas concentration. The infrared temperature sensor 13 is used to capture optical radiation, i.e. infrared temperature data. The CCD camera 14 is used for taking a picture of the scene, i.e., for image acquisition of the scene. The temperature sensor 11, the smoke sensor 12, the infrared temperature sensor 13 and the CCD camera 14 are respectively connected to the information processing module 21 of the general control terminal 2 through the CAN bus. The temperature sensor 11, the smoke sensor 12, the infrared temperature sensor 13 and the CCD camera 14 are respectively used for converting the detection data into electrical signals and transmitting the electrical signals to the information processing module 21.
In the present embodiment, as a preferable scheme, a first isolation chip a is disposed between the temperature sensor 11 and the overall control terminal 2; a second isolation chip B is arranged between the smoke sensor 12 and the master control terminal 2; a third isolation chip C is arranged between the infrared temperature sensor 13 and the master control terminal 2; a fourth isolation chip D is provided between the CCD camera 14 and the overall control terminal 2. An isolation chip is added before the main control chip signal of the main control terminal 2 enters, so that the interference of an external power supply to the main control chip of the main control terminal 2 is effectively prevented.
Of course, the temperature sensor 11, the smoke sensor 12, the infrared temperature sensor 13, and the CCD camera 14 may be connected to the information processing module 21 of the overall control terminal 2 through a communication network.
The action module 3 comprises an air valve closing device 31, a power supply disconnecting device 32 and a fire extinguisher control device 33, the air valve closing device 31, the power supply disconnecting device 32 and the fire extinguisher control device 33 are respectively connected with the control module 22 of the master control terminal 2 through a CAN bus, the air valve closing device 31 is connected with an air valve installed on an air inlet pipeline and used for controlling the air valve to be closed according to a received control signal, the power supply disconnecting device 32 is connected with a power supply and used for controlling the power supply to be disconnected according to the received control signal, the fire extinguisher control device 33 is connected with the fire extinguisher 6 and used for controlling the fire extinguisher 6 to be opened or closed according to the received control signal, the fire extinguisher 6 CAN be put out after being opened, and the fire extinguisher 6 is closed after the fire is extinguished.
In the present embodiment, as a preferable scheme, a fifth isolation chip E is disposed between the master control terminal 2 and the air valve closing device 31; a sixth isolation chip F is arranged between the master control terminal 2 and the power supply disconnection device 32; and a seventh isolation chip G is arranged between the master control terminal 2 and the fire extinguisher control device 33. An isolation chip is added after the signals of the main control chip of the main control terminal 2 are output, so that the interference of an external power supply to the main control chip of the main control terminal 2 is effectively prevented.
Of course, the gas valve closing device 31, the power supply disconnection device 32 and the fire extinguisher control device 33 may be connected to the control module 22 of the general control terminal 2 through a communication network.
The information processing module 21 includes an analog signal processing unit 211, a digital signal processing unit 212, a threshold changing unit 213 and a storage unit 214, the analog signal processing unit 211 is configured to perform analog signal processing on the detection data received from the detection module 1, the digital signal processing unit 212 is configured to perform digital signal processing on the detection data received from the detection module 1, and the storage unit 214 is configured to store the processed data; the control module 22 is used for controlling the gas valve closing device 31, the power supply disconnecting device 32 and the fire extinguisher control device 33 to work.
When the smoke detector works, the smoke sensor 12 is started to capture smoke concentration data and combustible gas concentration, the temperature sensor 11 is started to collect ambient temperature data, and the infrared temperature sensor 13 is started to capture infrared temperature data. The information processing module 21 determines whether the received smoke concentration data and the received combustible gas concentration data exceed corresponding thresholds, and whether the received ambient temperature data and the received infrared temperature data exceed corresponding thresholds, and if any data exceed corresponding thresholds, the CCD camera 14 is started again to photograph the site, that is, to acquire images of the site. The image recognition program is called through the information processing module 21, the flame form is extracted, whether the flame form is abnormal or not is judged, if the flame form is abnormal, the control module 22 transmits the processing data of the information processing module 21 to the display control module 4 through the communication network, the processing data of the information processing module is displayed through the display area, and the user operation instruction is inquired through the instruction area.
The display control module 4 is connected to the control module 22 through a communication network, the display control module 4 includes a display area for displaying the processing data of the information processing module 21 and an instruction area for inquiring the operation instruction of the user, and the instruction area includes a favorite recording instruction area and an automatic control instruction area. The display control module 4 has a prompt function, and prompts the user to perform a selection operation when receiving the processing data of the information processing module 21 and requiring to inquire an operation instruction of the user. Such as by being alerted in the form of a whistle or vibration.
If the recording preference instruction is selected, the threshold value changing unit analyzes the processing data of the information processing module 21, and changes the control threshold value according to the analysis result.
If the automatic control instruction is selected or no treatment instruction is received within the preset time h, the control module 22 sends an instruction to the air valve closing device 31 to control the air valve to be closed, the gas source is cut off, the fire is prevented from further expanding, the control module 22 simultaneously sends an instruction to the power supply disconnecting device 32 to control the power supply to be disconnected, and the control module 22 also simultaneously sends an instruction to the fire extinguisher control device 33 to start the fire extinguisher 6 to work to extinguish the fire. The fire can be eliminated in the initial stage through the series of emergency measures, and the casualties of people and property caused by the fire can be reduced.
The alarm module 5 is in communication connection with the control module 22 and is used for carrying out automatic alarm reminding when receiving the alarm control signal transmitted by the control module 22. Preferably, the alarm module 5 may be connected to the control module 22 through a CAN bus, or may be connected to the control module 22 through a communication network.
In this embodiment, as a preferable scheme, the threshold changing unit 213 analyzes the processing data of the information processing module 21 by a neural network analysis method.
In this embodiment, as a preferable scheme, the display control module 4 is an APP built in the mobile terminal. The operation is convenient for users.
In this embodiment, as a preferred scheme, the mobile terminal is a mobile phone, a tablet computer, an electronic bracelet or other electronic devices. The portable fire alarm device is convenient to carry, and can receive fire information at the first time in any place with a network by using a mobile phone, so that measures can be taken conveniently. This scheme utilizes cell-phone or other mobile terminal, utilizes communication to remind and APP deals with, increases the face of being used, improves the accuracy of handling, practices thrift systematic intelligent cost.
In the present embodiment, the alarm module 5 preferably includes a buzzer and/or a flashing device. The scheme enables the alarm signal sent by the alarm module 5 to be larger in dynamic and static states, and avoids the best time for people to take measures because the alarm signal cannot be found.
In this embodiment, as a preferable scheme, the power supply includes a storage battery and an ac conversion module.
In the present embodiment, the smoke sensor 12 is preferably located above a position where natural gas leakage is likely to occur (a detected position). Because the smoke density above the detected position is the maximum at the initial stage of the fire, the smoke sensor 12 is positioned above the cooker, so that the smoke information can be detected in the first time, and the delay of the fire is prevented.
In this embodiment, as a preferable scheme, the infrared temperature sensor 13 and the CCD camera 14 are located at the periphery of a position where natural gas leakage is likely to occur (a detected position), and are preferably located at the same height, so as to facilitate accurate and complete image acquisition of the shape of the flame.
Method embodiment
As shown in fig. 4, the present invention provides a method for controlling a fire alarm device, including the steps of:
s1, a timer calculates a time interval t from the last signal processing.
S2, the information processing module 21 judges whether the time interval T is greater than or equal to a preset value T, if so, the step S3 is executed; otherwise, step S1 is executed. The preset value T is a positive number greater than 0, and the specific value is determined according to specific conditions.
S3, firstly, starting the smoke sensor 12 to capture smoke concentration data and combustible gas concentration, starting the temperature sensor 11 to collect ambient temperature data, and starting the infrared temperature sensor 13 to capture infrared temperature data. The information processing module 21 determines whether the received smoke concentration data and combustible gas concentration data exceed the corresponding thresholds, and whether the received ambient temperature data and infrared temperature data exceed the corresponding thresholds, and if any one of the data exceeds the corresponding threshold, executes step S4; otherwise, step S1 is executed.
Wherein, the smoke concentration data and the combustible gas concentration data threshold are calibrated and determined by pre-grading. Fig. 5 is a typical comparison graph of the relationship between gas concentration and power supply, and the alarm threshold is set in stages according to the corresponding relationship between voltage and smoke (gas) concentration in the graph, mainly the relationship between combustible gas and Co and power supply.
Before the program is run formally, there is a threshold value setting inquiry subprogram. And setting the alarm threshold as the highest alarm threshold, and after the subprogram is inquired for n times, fixing the relevant information condition of the user, fixing the threshold condition and switching to a silent state. If a false positive condition exists later, the user can reset or manually adjust the sensitivity. But the manual threshold does not exceed the automatic minimum threshold.
The limit of the lowest threshold value is to guarantee safety, and false alarm is prevented while safety is guaranteed to the maximum extent. And comprehensively balancing and confirming the lowest threshold value according to the lowest value of the stable response of the sensor range and the range precision. For example, if the minimum value of the sensor range is 0, the determination is made based on the maximum value of the floating value at 0, and if not, the minimum threshold value is determined based on the product of the minimum value of the sensor range and the measurement accuracy. For example, a minimum of 25PPm can be established based on the range of span of 0-500PPm, and the accuracy of the measurement + -5%.
For example:
system set level 1, 2, 3 alarms
Gas concentration 100PPM corresponding to 1-level alarm threshold
Gas concentration 175PPM corresponding to 2-level alarm threshold
Gas concentration 250PPM corresponding to 3-level alarm threshold
After the system is initially installed by a user: the following scenario simulation was performed.
(1) When a user enters a kitchen, if gas or smoke alarm exists, an alarm source inquires whether detection is normal or not, the alarm threshold value is sequentially increased, whether people enter the kitchen or not can be judged through a CCD camera, and the like.
(2) After the infrared temperature sensor responds for a period of time, namely when the cooker works, namely when a user cooks, whether the user adds cooking wine or not is judged, if gas or smoke exists, an alarm is given and inquires whether the detection is normal or not, and an alarm threshold value, a fixed threshold value and the like are sequentially increased.
The threshold value of the environmental temperature data is determined according to the following two conditions:
1. when the ignition stove is not started (judged by infrared temperature data), and the derivative of the infrared temperature data to time is stably changed, the fire is judged to be not fired; if the derivative of the infrared temperature data with respect to time abnormally changes, a misfire is identified.
2. And when the ignition stove is started, determining the range of the ambient temperature according to the ignition time and the temperature of the unopened ignition stove.
Threshold determination of infrared temperature data: 1. whether the kitchen range works or not is qualitatively judged by directly judging the infrared temperature information of the flame. 2. Whether the iron pan is dry-burned or not is judged by directly judging the infrared temperature information of the iron pan.
S4, the information processing module 21 judges whether the CCD camera 14 is started, if so, the step S6 is executed, otherwise, the step S5 is executed.
S5, starting the CCD camera 14.
And S6, the CCD camera 14 collects images and converts the detection data into electric signals to be transmitted to the information processing module 21.
And S7, calling an image recognition program by the information processing module 21, and extracting the flame form.
S8, the information processing module 21 judges whether the flame form is abnormal, and if the flame form is abnormal, the step S9 is executed; otherwise, step S1 is executed.
The scheme judges whether the flame form is abnormal or not by the following method:
the normal state of the flame is mainly a pot state and a non-pot state, and after the flame structure image is processed, the following information can be collected for judgment: flame length, and flame distribution (planar), flame exit angle.
When no pot is available, the state of big fire is as follows: the inner layer and the outer layer of flames are petal-shaped, and the outer ring of flames is slightly inward convergent in appearance.
When no pot is available, the medium fire state is as follows: the outer ring flame extinguishes only the inner ring flame, and the flame shape is similar to that of a big fire.
When no pot is available, the state of small fire is as follows: the flame shape was significantly weaker.
When a pot is available: the petals of the inner and outer ring flames turn outwards.
The normal state, the flame length, the flame distribution area and the emergence angle are all in a range, and the fire condition can be determined by setting the ranges as threshold values.
And S9, the control module 22 transmits the processing data of the information processing module 21 to the display control module 4 through the communication module, displays the processing data of the information processing module 21 through the display area, and inquires a user operation instruction through the instruction area.
S10, the control module 22 determines whether the control instruction transmitted from the display control module 4 is received within the preset time h, and if the control instruction is received, performs step S11; otherwise, step S13 is executed. The value of the preset time h is a positive number greater than 0, and the specific value is determined according to specific conditions.
S11, the control module 22 judges whether the received control instruction is a favorite recording instruction or an automatic control instruction, and if the received control instruction is the favorite recording instruction, the step S12 is executed; if it is the automatic control instruction, step S13 is executed.
S12. the threshold changing unit analyzes the processing data of the information processing module 21 and changes the control threshold according to the analysis result, after which step S7 is executed.
S13, the control module 22 sends an instruction to the air valve closing device 31 to control the air valve to be closed, sends an instruction to the power supply disconnecting device 32 to control the power supply to be disconnected, sends an instruction to the alarm module 5 to give an alarm, and sends an instruction to the fire extinguisher control device 33 to start the fire extinguisher 6.
In the method, a multi-sensor adopts a situation-based working mode and a sectional judgment method, the temperature sensor 11, the smoke sensor 12 and the infrared temperature sensor 13 are firstly utilized to quickly and roughly check, and if a problem exists, the CCD camera 14 is used for carrying out image careful detection, so that the detection comprehensiveness is improved, the detection efficiency and quality are ensured, the processing and running time of an information processing module is shortened, the instantaneity is improved, and the system life is prolonged. The method can also be used for processing tasks by analogy with a computer CPU (central processing unit), running with low power consumption under a normal condition, and running with short-time overclocking under the condition of processing complex programs or multiple tasks.
In this embodiment, as a preferable scheme, in step S12, the threshold changing unit analyzes the processing data of the information processing module 21 by a neural network analysis method.
Specifically, the inputs to the neural network are the flame length, and the flame distribution (area, flame exit angle, user decision, etc.). The output of the neural network is the fitted characteristic range information of the normal flame. The system itself is provided with a fixed range, but since the user may prefer a strong or soft fire, the central point of the above information may deviate from the user's actual situation, leading to an increase in false alarms. Whether the fire condition is met or not is manually intervened, the system automatically learns to adjust the length, the distribution area and the flame emergence angle range of the normal flame, adjusts the habitual operation method of the user, finally fits reasonable flame parameters of the user-used cooking utensils, simultaneously eliminates the parameters of false alarm, and changes (adjusts) the control threshold value according to the analysis result, so that false alarm is reduced.
The neural network analysis method is mainly used for confirming parameters of image processing, and whether the flame range, the flame length and the flame incident angle are smaller than a threshold value. The threshold is finally confirmed according to the user intervention state and the long-time acquisition and learning of the flame of the user on the basis of the laboratory threshold, so that the judgment is more accurate, and the image processing is the final judgment and is determined according to the user learning.
Other thresholds (smoke concentration data, combustible gas concentration data threshold, ambient temperature data threshold, and infrared temperature data threshold) are set according to laboratory conditions, and can be set strictly.
In the present embodiment, the alarm module 5 preferably gives an alarm by a buzzer and/or a flashing device.
In this embodiment, as a preferable scheme, in step S9, the display control module 4 sends out a prompt signal through the warning area.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.
Claims (4)
1. A method of controlling a fire alarm device, comprising the steps of:
s1, a timer calculates a time interval t from the last signal processing;
s2, the information processing module judges whether the time interval T is greater than or equal to a preset value T, if so, the step S3 is executed; otherwise, go to step S1;
s3, starting a smoke sensor to capture smoke concentration data and combustible gas concentration, starting the temperature sensor to collect environment temperature data, starting an infrared temperature sensor to capture infrared temperature data, judging whether the received smoke concentration data and combustible gas concentration data exceed corresponding thresholds or not by an information processing module, judging whether the received environment temperature data and infrared temperature data exceed corresponding thresholds or not, and executing a step S4 if any data exceed corresponding thresholds; otherwise, go to step S1;
s4, the information processing module judges whether the CCD camera is started, if so, the step S6 is executed, otherwise, the step S5 is executed;
s5, starting a CCD camera;
s6, the CCD camera collects images and converts the detected data into electric signals to be transmitted to the information processing module;
s7, calling an image recognition program by the information processing module, and extracting the flame form;
s8, the information processing module judges whether the flame form is abnormal, and if the flame form is abnormal, the step S9 is executed; otherwise, go to step S1;
s9, the control module transmits the processing data of the information processing module to the display control module through the communication module, displays the processing data of the information processing module through the display area, and inquires a user operation instruction through the instruction area;
s10, the control module judges whether a control instruction transmitted from the display control module is received within a preset time h, and if the control instruction is received, the step S11 is executed; otherwise, go to step S13;
s11, the control module judges whether the received control instruction is a favorite recording instruction or an automatic control instruction, and if the received control instruction is the favorite recording instruction, the step S12 is executed; if the command is an automatic control command, executing step S13;
s12, the threshold value changing unit analyzes the processing data of the information processing module, changes the control threshold value according to the analysis result, and then executes the step S7;
s13, the control module sends an instruction to the air valve closing device to control the air valve to be closed, sends an instruction to the power supply disconnecting device to control the power supply to be disconnected, sends an instruction to the alarm module to give an alarm, and sends an instruction to the fire extinguisher control device to start the fire extinguisher.
2. The method of controlling a fire alarm apparatus according to claim 1, wherein the threshold value changing unit analyzes the process data of the information processing module through a neural network analysis method at step S11.
3. The method of claim 1, wherein the alarm module alarms through a buzzer and/or a flashing device.
4. The method of claim 1, wherein the display manipulation module emits a prompt signal through the warning region in step S8.
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