CN110992615A - Smoke detection method and device and detector - Google Patents
Smoke detection method and device and detector Download PDFInfo
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- CN110992615A CN110992615A CN201911373097.XA CN201911373097A CN110992615A CN 110992615 A CN110992615 A CN 110992615A CN 201911373097 A CN201911373097 A CN 201911373097A CN 110992615 A CN110992615 A CN 110992615A
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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
- 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
- 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
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
- G08B17/117—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means by using a detection device for specific gases, e.g. combustion products, produced by the fire
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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Abstract
The invention relates to a smoke detection method, a smoke detection device and a smoke detector, belonging to the technical field of smoke detection. When the temperature value is lower than the temperature threshold value, whether the concentration value of the combustible gas exceeds the concentration threshold value of the combustible gas or not is judged, so that the pot overflow phenomenon is accurately judged, and the technical problem that in the prior art, the smoke detector gives an alarm after detecting smoke, kitchen smoke, fire alarm and pot overflow cannot be distinguished, and potential safety hazards are generated is solved.
Description
Technical Field
The invention belongs to the technical field of smoke detection, and particularly relates to a smoke detection method, a smoke detection device and a smoke detector.
Background
The overflow refers to the phenomenon that water in the pot boils and overflows from the pot. The phenomenon of pot overflow is very common in a kitchen, and especially when soup or porridge is cooked, people generally can directly place a pot on a cooking range or leave the kitchen after a set time because the required time is long, and return to the kitchen for checking and turning off the fire after enough time. When the gas stove is extinguished and the gas is still released, the gas will explode to cause fire when the concentration reaches a certain value.
At present, in the prior art, an NB smoke detector is usually installed in a kitchen for smoke detection, and after smoke is detected, an alarm is given out, so that a cooker is reminded to pay attention to the phenomenon of pot overflow.
However, in many times, because kitchen oil smoke is large, the existing NB smoke detector cannot accurately judge whether the kitchen oil smoke or the fire smoke occurs, once the smoke occurs, an alarm occurs, and a user generally thinks that the alarm is oil smoke and the like, so that the alarm is easy to be raised and defended, and potential safety hazards exist.
Disclosure of Invention
The invention provides a kitchen smoke detection method, a kitchen smoke detection device and a kitchen smoke detector, which are used for kitchen smoke detection and have the characteristics of accurately distinguishing fire and pot overflow and the like, and at least solve the technical problems of false alarm and potential safety hazard of the smoke detector in the prior art.
The technical scheme provided by the invention is as follows:
in one aspect, a method of smoke detection, comprises:
acquiring a smoke concentration value of a target environment;
judging whether the smoke-feeling concentration value is larger than a calibrated smoke-feeling threshold value or not;
if the smoke intensity value is larger than the calibrated smoke intensity threshold value, acquiring a temperature value of the target environment;
judging whether the temperature value is greater than a temperature threshold value;
if the temperature value is larger than the temperature threshold value, triggering a fire alarm to alarm;
if the temperature value is not greater than the temperature threshold value, acquiring a combustible gas concentration value in the target environment;
judging whether the concentration value of the combustible gas exceeds a combustible gas concentration threshold value;
and if the concentration value of the combustible gas exceeds the concentration threshold value of the combustible gas, triggering a pot overflow alarm.
Further optionally, before the obtaining the smoke concentration value of the target environment, the method further includes:
detecting whether a human body exists in the target environment;
the obtaining of the smoke concentration value in the target environment is:
and if the human body is not detected to exist in the target environment, acquiring a smoke feeling concentration value in the target environment.
Further optionally, the method further comprises:
acquiring a wind speed value in the target environment;
judging whether the wind speed value exceeds a wind speed threshold value;
and if the concentration value exceeds the preset value, increasing the smoke concentration value and/or the combustible gas concentration value according to a preset rule.
Further optionally, the method further comprises:
and if the concentration value of the combustible gas does not exceed the concentration threshold value of the combustible gas, triggering low-temperature alarm.
Further optionally, the method further comprises:
acquiring the time length that the smoke-sensitive concentration value is greater than the calibrated smoke-sensitive threshold value;
judging whether the duration is greater than a duration threshold value;
and if the time length is greater than the time length threshold value, sending warning information to a preset terminal.
In yet another aspect, a smoke detection device comprises: the device comprises a smoke detection module, a control module, a temperature detection module, a combustible gas concentration detection module and an alarm module;
the smoke detection module is used for acquiring a smoke concentration value of a target environment and sending the smoke concentration value to the control module;
the control module is used for receiving and judging whether the smoke-sensitive concentration value is greater than a calibrated smoke-sensitive threshold value or not, and sending a first trigger signal to the temperature detection module when the smoke-sensitive concentration value is greater than the calibrated smoke-sensitive threshold value; the temperature sensor is also used for receiving the temperature value of the target environment, judging whether the temperature value of the target environment is greater than a temperature threshold value or not, and sending a second trigger signal to the combustible gas concentration detection module when the temperature value is not greater than the temperature threshold value; the temperature sensor is also used for sending a fire alarm trigger signal to the alarm module when the temperature value is greater than the temperature threshold value; the system is also used for receiving a combustible gas concentration value sent by the combustible gas concentration detection module, judging whether the combustible gas concentration value exceeds a combustible gas concentration threshold value, and sending a pot overflow prompting trigger signal to the alarm module when the combustible gas concentration value exceeds the combustible gas concentration threshold value;
the temperature detection module is used for acquiring a temperature value of the target environment after receiving the first trigger signal and sending the temperature value of the target environment to the control module;
the combustible gas concentration detection module is used for acquiring a combustible gas concentration value in the target environment after receiving the second trigger signal and sending the combustible gas concentration value to the control module;
and the alarm module is used for carrying out fire alarm after receiving the fire alarm trigger signal and carrying out pot overflow alarm after receiving the pot overflow prompt trigger signal.
Further optionally, the method further comprises: a human body detection module;
the human body detection module is used for detecting whether a person exists in the target environment, outputting human body detection information and sending the human body detection information to the control module;
the control module is further configured to receive the human body detection information, and send a closing indication signal to the smoke detection module when the human body detection information indicates that a human body exists in the target environment; when the human body detection information indicates that no human body exists in the target environment, sending an opening indication signal to the smoke detection module;
the smoke detection module is also used for receiving the closing indication signal or the opening indication signal sent by the control module and carrying out closing or opening operation.
Further optionally, the method further comprises: a wind speed detection module;
the wind speed detection module is used for acquiring a wind speed numerical value in the target environment and sending the wind speed numerical value to the control module;
the control module is further configured to receive the wind speed value sent by the wind speed detection module, determine whether the wind speed value exceeds a wind speed threshold, and increase the smoke concentration value and/or the combustible gas concentration value according to a preset rule when the wind speed value exceeds the wind speed threshold.
Further optionally, the method further comprises: a timing module;
the timing module is used for acquiring the duration information that the smoke detection concentration value is greater than the calibrated smoke detection threshold value and sending the duration information to the control module;
the control module is further configured to receive the duration information sent by the timing module, determine whether the duration is greater than a duration threshold, and send warning information to a preset terminal when the duration is greater than the duration threshold.
In yet another aspect, a smoke detector includes: comprising a memory for storing a computer program and a processor for executing the computer program for implementing the method for smoke detection for a target environment according to any of claims 1-5. .
According to the smoke detection method, the smoke detection device and the smoke detector provided by the embodiment of the invention, after the smoke concentration value of the target environment is detected to be greater than the calibrated smoke threshold, whether the temperature value of the target environment exceeds the temperature threshold is judged again, so that after the temperature value exceeds the temperature threshold, the fire phenomenon of the target environment is judged, and the fire alarm is carried out. When the temperature value is lower than the temperature threshold value, whether the concentration value of the combustible gas exceeds the concentration threshold value of the combustible gas or not is judged, so that the pot overflow phenomenon is accurately judged, and the technical problem that in the prior art, the smoke detector gives an alarm after detecting smoke, kitchen smoke, fire alarm and pot overflow cannot be distinguished, and potential safety hazards are generated is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a smoke detection method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of another smoke detection method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a smoke detection device according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a storage structure of the smoke detector provided in real time in accordance with the present invention;
fig. 5 is a schematic diagram of an internal structure of a smoke detector according to an embodiment of the present invention;
fig. 6 is an external structural view of fig. 5.
Reference numerals:
31-smoke detection module; 32-a control module; 33-a temperature detection module; 34-a combustible gas concentration detection module; 35-an alarm module; 36-a human detection module; 37-wind speed detection module; 38-a timing module; 501-PCB circuit board; 502-NB-IOT module; 503-NB-IOT antennas; 504-combustible gas detection system; 505-a combustible gas sensor; 506-human body induction detection system; 507-a pyroelectric infrared sensor and a Fresnel lens; 508-temperature detection system; 509-temperature sensor; 510-a master control system; 511-MCU micro control unit; 512-LED small indicator light; 513-sound system; 514-self-check/mute button; 515-buzzer; 61-a housing; 611-combustible gas intake holes; 612-pyroelectric infrared sensor + fresnel lens hole; 613-temperature sensor hole; 614-smoke labyrinth upper cover; 615-buzzer sounding hole.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The first embodiment is as follows:
to more clearly illustrate the processes and advantages of the method of the present embodiment, the present invention provides a smoke detection method.
Fig. 1 is a schematic flow chart of a smoke detection method according to an embodiment of the present invention.
Referring to fig. 1, a smoke detection method according to an embodiment of the present invention may include the following steps:
and S11, acquiring the smoke density value of the target environment.
Specifically, a certain environment is defined as a target environment, and preferably, a kitchen is taken as an example and explained herein. For example, after detecting smoke in the kitchen, a smoke intensity value in the kitchen is detected by the smoke detection module. The smoke detection module is preferably a smoke detection system in an NB smoke detector and is used for detecting a smoke concentration value in a kitchen.
And S12, judging whether the smoke density value is larger than a calibrated smoke density threshold value.
And after the smoke feeling concentration value is obtained, comparing the smoke feeling concentration value with the calibrated smoke feeling threshold value. The calibrated smoke sensation threshold value is a calibrated smoke sensation threshold value set by a user or a manufacturer, and the set standard can be an empirical value or can be adjusted according to specific requirements, and is not limited specifically here.
And S13, if the smoke density value is larger than the calibrated smoke density threshold value, acquiring a temperature value of the target environment.
And if the detected smoke intensity value is larger than the calibrated smoke intensity threshold value, triggering to acquire a temperature value in the target environment. For example, if the smoke concentration value of the kitchen is detected to be 5 and the set calibrated smoke threshold value is 4, it is determined that 5 is greater than 4, which indicates that the smoke concentration of the kitchen reaches and exceeds the set standard, and there is a risk of fire alarm or pot overflow, so as to further distinguish and determine the reason for the kitchen smoke exceeding the standard.
And triggering to enter a temperature detection system, and detecting a temperature value in the kitchen. Preferably, a temperature detection module is used to detect a temperature value of the kitchen, for example, the temperature detection module may include a temperature sensor.
And S14, judging whether the temperature value is larger than the temperature threshold value.
Still taking the kitchen as an example, after the temperature value of the kitchen is detected, the size of the temperature value and the temperature threshold value is judged. The temperature threshold value is a numerical value set by a user or a manufacturer, and the setting standard may be a fire experience value, or may be set according to a specific requirement, which is not specifically limited herein.
And S15, if the temperature value is larger than the temperature threshold value, triggering a fire alarm to alarm.
When the temperature value of the kitchen is judged to be larger than the temperature threshold value, the temperature of the kitchen is judged to exceed the standard, a fire disaster occurs, and a fire alarm is triggered.
For example, when the detected temperature value of the kitchen is 42 ℃, and the temperature threshold value is set to 40 ℃, and when the temperature value 42 is greater than 40, it indicates that the temperature of the kitchen reaches and exceeds the maximum preset temperature, the alarm device is triggered to give an alarm, and the alarm device may be a buzzer or an audible and visual alarm, which is not specifically limited herein.
And S16, if the temperature value is not greater than the temperature threshold value, acquiring the concentration value of the combustible gas in the target environment.
When the temperature value of the kitchen is judged to be smaller than or equal to the temperature threshold value, the temperature of the kitchen does not exceed the preset standard, and the smoke-sensitive concentration value of the kitchen exceeds the calibrated smoke-sensitive threshold value at the moment, so that the risk of pot overflow phenomenon in the kitchen is shown, and therefore, the combustible gas detection is triggered to detect the combustible gas concentration value in the kitchen when the condition of the kitchen combustible gas is further judged. Preferably, on the basis of the original smoke sensation, a CO sensor is added, and whether the alarm type is a boiler overflow combustible gas leakage alarm or a fire alarm is determined through combustible gas detection. It should be noted that the combustible gas is illustrated by way of example and not by way of limitation.
And S17, judging whether the concentration value of the combustible gas exceeds the threshold value of the concentration of the combustible gas.
After the combustible gas concentration value is obtained, the combustible gas concentration value and the combustible gas concentration threshold value are judged, the combustible gas concentration threshold value is set by a user or a manufacturer, the setting standard can be an empirical value or other specific requirements, and the setting standard is not specifically limited.
And S18, if the concentration value of the combustible gas exceeds the concentration threshold value of the combustible gas, triggering a pot overflow alarm.
When the obtained concentration value of the combustible gas exceeds the concentration threshold value of the combustible gas, the concentration of the combustible gas in the kitchen exceeds the normal level, the combustible gas leaks in the kitchen, namely, the phenomenon of pot overflow in the kitchen is caused, the stove fire is extinguished, and the gas stove still conveys the fuel gas outwards to trigger the pot overflow alarm. The overflow alarm mode is different from the fire alarm mode, so that the overflow alarm and the fire alarm can be distinguished. For example, the fire alarm mode may be intermittent alarm by a buzzer, and the overflow alarm mode may be continuous alarm by a buzzer, and the like, which is not limited specifically here.
According to the smoke detection method provided by the embodiment of the invention, after the smoke concentration value of the target environment is detected to be larger than the calibrated smoke threshold, whether the temperature value of the target environment exceeds the temperature threshold is judged again, so that after the temperature value exceeds the temperature threshold, the fire phenomenon of the target environment is judged, and the fire alarm is carried out. When the temperature value is lower than the temperature threshold value, whether the concentration value of the combustible gas exceeds the concentration threshold value of the combustible gas or not is judged, so that the pot overflow phenomenon is accurately judged, and the technical problem that in the prior art, the smoke detector gives an alarm after detecting smoke, kitchen smoke, fire alarm and pot overflow cannot be distinguished, and potential safety hazards are generated is solved.
Example two:
in order to further explain the technical scheme of the invention, the invention also provides another embodiment.
Fig. 2 is a schematic flow chart of another smoke detection method according to an embodiment of the present invention.
Referring to fig. 2, another smoke detection method according to an embodiment of the present invention may include the following steps:
s201, detecting whether a human body exists in the target environment.
Still taking the kitchen as an example, whether a human body exists in the kitchen is detected, preferably, the human body information is detected by using a human body detection module, and the human body information can be detected by using a pyroelectric infrared sensor.
And S2011, if the human body is not detected to exist in the target environment, acquiring a smoke concentration value in the target environment.
Specifically, taking the kitchen as an example as well, when the presence of a human body in the target environment is not detected, it is described that no human body is present in the kitchen, and when the cooking person leaves the kitchen, the smoke density value detection is performed. Specifically, referring to step S11 of the foregoing embodiment, a smoke density value in the target environment is obtained, which is not described herein again.
S2012, if it is detected that a human body exists in the target environment, step S21 is executed.
S202, judging whether the smoke-feeling concentration value is larger than a calibrated smoke-feeling threshold value.
S203, if the smoke-sensitive concentration value is larger than the calibrated smoke-sensitive threshold value, acquiring a temperature value of the target environment;
s204, judging whether the temperature value is larger than a temperature threshold value;
s205, if the temperature value is larger than the temperature threshold value, triggering a fire alarm to alarm;
s206, if the temperature value is not greater than the temperature threshold value, acquiring a concentration value of the combustible gas in the target environment;
s207, judging whether the concentration value of the combustible gas exceeds a combustible gas concentration threshold value;
and S208, if the concentration value of the combustible gas exceeds the concentration threshold value of the combustible gas, triggering a pot overflow alarm.
Steps S202 to S208 are the same as steps S12 to S18 in the above embodiment, please refer to the above embodiment, which is not described herein again.
And S209, if the concentration value of the combustible gas does not exceed the concentration threshold value of the combustible gas, triggering low-temperature alarm.
When the obtained concentration value of the combustible gas is less than or equal to the threshold value of the combustible gas concentration, the concentration of the combustible gas in the kitchen does not exceed the normal level, and the combustible gas does not leak or the concentration of the combustible gas is in the normal level in the kitchen, namely, the phenomenon of pot overflow in the kitchen is not caused. And if the smoke concentration of the kitchen exceeds the smoke concentration threshold value at the moment, the phenomena of rice burning or scorching and the like can be caused, and a low-temperature alarm is sent. The low temperature alarm mode is not limited specifically, and may be the same as or different from the fire alarm and the overflow alarm, and the user may set the low temperature alarm mode according to the specific requirement.
S210, acquiring a wind speed value in a target environment; judging whether the wind speed value exceeds a wind speed threshold value; if the smoke intensity exceeds the preset value, increasing the smoke intensity concentration value and/or the combustible gas concentration value according to a preset rule.
Still taking a kitchen as an example, in daily kitchen use, in order to keep fresh air in the kitchen, many people choose to turn on the range hood when cooking or cooking, and even choose to turn on the range hood when cooking soup, which makes certain influence on the detection of smoke concentration value in the kitchen. In order to more accurately determine the smoke density value in the kitchen, the wind speed value in the kitchen may be obtained after the smoke density value in the kitchen is obtained, for example, a wind speed sensor may be selected to detect the wind speed value in the kitchen, and a wind speed threshold may be set. The setting of the wind speed threshold value can be set according to the influence degree of the smoke exhaust ventilator and the kitchen pattern setting on the smoke density value, and the setting is not limited specifically here.
And after the acquired wind speed value is acquired, comparing the wind speed value with a wind speed threshold value, and when the wind speed value is larger than the wind speed threshold value, indicating that the wind speed has a certain influence on smoke detection, increasing the smoke detection concentration value and/or the combustible gas concentration value on the basis of the originally acquired temperature value and/or the combustible gas concentration value. And then judging the increased smoke density value and/or combustible gas density value and the preset standard value again.
It should be noted that the acquisition of the wind speed value may be performed after the acquisition of the smoke concentration value in the target environment in S2011, or after the acquisition of the combustible gas concentration value in the target environment in S206, which is not specifically limited herein.
S211, acquiring the duration that the smoke sensation concentration value is greater than the calibrated smoke sensation threshold value; judging whether the duration is greater than a duration threshold value; and if the time length is greater than the time length threshold value, sending warning information to a preset terminal.
And recording the duration that the smoke concentration value is greater than the calibrated smoke threshold after the smoke concentration value is obtained and the smoke concentration value is judged to be greater than the calibrated smoke threshold, and judging the duration and the duration threshold, wherein if the duration that the smoke concentration value is greater than the calibrated smoke threshold is greater than the duration threshold, the smoke in the kitchen is not effectively processed for a long time, and the situation that no person exists in the room possibly results in no alarm information being received. In order to improve the safety performance, warning information can be sent to a preset terminal.
For example, the time length threshold is 10 minutes, and within 10 minutes, if the smoke concentration value of the kitchen is always higher than the smoke concentration threshold, it indicates that smoke in the kitchen is not effectively processed, and a warning message may be sent to a preset mobile phone, or an alarm message may be set to be sent to a property department, so as to prompt the user that the smoke is possibly poisoned and coma.
It should be noted that steps S209 to S211 are only examples of the method steps, and the order of implementation is not limited.
According to the smoke detection method provided by the embodiment of the invention, after the smoke concentration value of the target environment is detected to be larger than the calibrated smoke threshold, whether the temperature value of the target environment exceeds the temperature threshold is judged again, so that after the temperature value exceeds the temperature threshold, the fire phenomenon of the target environment is judged, and the fire alarm is carried out. When the temperature value is lower than the temperature threshold value, whether the concentration value of the combustible gas exceeds the concentration threshold value of the combustible gas or not is judged, so that the pot overflow phenomenon is accurately judged, and the technical problem that in the prior art, the smoke detector gives an alarm after detecting smoke, kitchen smoke, fire alarm and pot overflow cannot be distinguished, and potential safety hazards are generated is solved. Meanwhile, by detecting whether a human body exists in the target environment, smoke detection can be started in a targeted manner, and energy is saved. The low-temperature alarm is triggered when the concentration value of the combustible gas does not exceed the concentration threshold value of the combustible gas, so that a user can more clearly distinguish the phenomena of smoke, fire and pot overflow of a target environment, and a corresponding reaction is made. By analyzing the wind speed value of the target environment, the influence of the wind speed on the detection of the environmental parameters is reduced, and the detection precision is improved. Through setting the time threshold value, when smoke cannot be timely processed within a certain time, the warning information is sent to the preset terminal, and the technical problems that in the prior art, a user cannot inform others due to suffocation and falling down and the user cannot know indoor smoke alarm information due to absence of the user in a room so that a fire disaster occurs are solved.
Example three:
in order to further explain the technical scheme of the invention in correspondence with the above method embodiment, the embodiment of the invention also provides a smoke detection device.
Fig. 3 is a schematic structural diagram of a smoke detection device according to an embodiment of the present invention.
Referring to fig. 3, a smoke detection device provided in an embodiment of the present invention may include: the smoke detection module 31, the control module 32, the temperature detection module 33, the combustible gas concentration detection module 34 and the alarm module 35;
the smoke detection module 31 is configured to obtain a smoke concentration value of the target environment and send the smoke concentration value to the control module 32;
the control module 32 is configured to receive and determine whether the smoke density value is greater than a calibrated smoke density threshold, and send a first trigger signal to the temperature detection module 33 when the smoke density value is greater than the calibrated smoke density threshold; the temperature sensor is further configured to receive a temperature value of the target environment, determine whether the temperature value of the target environment is greater than a temperature threshold, and send a second trigger signal to the combustible gas concentration detection module 34 when the temperature value is not greater than the temperature threshold; the alarm module is further configured to send a fire alarm trigger signal to the alarm module 35 when the temperature value is greater than the temperature threshold value; the system is further configured to receive a combustible gas concentration value sent by the combustible gas concentration detection module 34, determine whether the combustible gas concentration value exceeds a combustible gas concentration threshold, and send a pot overflow prompting trigger signal to the alarm module 35 when the combustible gas concentration value exceeds the combustible gas concentration threshold;
the temperature detection module 33 is configured to obtain a temperature value of the target environment after receiving the first trigger signal, and send the temperature value of the target environment to the control module 32;
the combustible gas concentration detection module 34 is configured to obtain a combustible gas concentration value in the target environment after receiving the second trigger signal, and send the combustible gas concentration value to the control module 32;
and the alarm module 35 is used for performing fire alarm after receiving the fire alarm trigger signal and performing pot overflow alarm after receiving the pot overflow prompt trigger signal.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
According to the smoke detection device and the smoke detector provided by the embodiment of the invention, after the smoke concentration value of the target environment is detected to be larger than the calibrated smoke threshold, whether the temperature value of the target environment exceeds the temperature threshold is judged again, so that after the temperature value exceeds the temperature threshold, the fire phenomenon of the target environment is judged, and the fire alarm is carried out. When the temperature value is lower than the temperature threshold value, whether the concentration value of the combustible gas exceeds the concentration threshold value of the combustible gas or not is judged, so that the pot overflow phenomenon is accurately judged, and the technical problem that in the prior art, the smoke detector gives an alarm after detecting smoke, kitchen smoke, fire alarm and pot overflow cannot be distinguished, and potential safety hazards are generated is solved.
Further, on the basis of the above embodiment, referring to fig. 3, the method further includes: a human detection module 36;
a human body detection module 36, configured to detect whether a person exists in the target environment, output human body detection information, and send the human body detection information to the control module 32;
the control module 32 is further configured to receive human body detection information, and send a closing indication signal to the smoke detection module when the human body detection information indicates that a human body exists in the target environment; when the human body detection information indicates that no human body exists in the target environment, sending an opening indication signal to the smoke detection module;
the smoke detection module 31 is further configured to receive a closing indication signal or an opening indication signal sent by the control module, and perform a closing or opening operation.
Further, on the basis of the above embodiment, referring to fig. 3, the method further includes: a wind speed detection module 37;
the wind speed detection module 37 is used for acquiring a wind speed value in a target environment and sending the wind speed value to the control module;
the control module 32 is further configured to receive the wind speed value sent by the wind speed detection module, determine whether the wind speed value exceeds a wind speed threshold, and increase the smoke concentration value and/or the combustible gas concentration value according to a preset rule when the wind speed value exceeds the wind speed threshold.
Further, on the basis of the above embodiment, referring to fig. 3, the method further includes: a timing module 38;
the timing module 38 is configured to obtain duration information that the smoke density value is greater than the calibrated smoke density threshold, and send the duration information to the control module;
the control module 32 is further configured to receive the duration information sent by the timing module, determine whether the duration is greater than a duration threshold, and send warning information to the preset terminal when the duration is greater than the duration threshold.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Example four:
in order to adapt to the above method and apparatus embodiments, the technical solution of the present invention is further explained, and the embodiment of the present invention further provides a smoke detector.
Fig. 4 is a schematic diagram of a storage structure of the smoke detector provided in real time according to the present invention.
Referring to fig. 4, a storage structure of a smoke detector according to an embodiment of the present invention may include: comprising a memory 41 and a processor 42, the memory 41 being arranged to store a computer program and the processor 42 being arranged to execute the computer program to implement the smoke detection method as described in any one of the above embodiments.
Example five:
in order to further explain the technical scheme of the invention, the invention also provides another embodiment.
Fig. 5 is a schematic diagram of an internal structure of a smoke detector according to an embodiment of the present invention; fig. 6 is an external structural view of fig. 5.
Referring to fig. 5 to 6, a smoke detector according to an embodiment of the present invention includes: the system comprises a PCB 501, an NB-IOT module 502, an NB-IOT antenna 503, a combustible gas detection system 504, a combustible gas sensor 505, a human body induction detection system 506, a pyroelectric infrared sensor and Fresnel lens 507, a temperature detection system 508, a temperature sensor 509, a main control system 510, an MCU micro control unit 511, an LED small indicator lamp 512, a sound system 513, a self-checking/silencing button 514 and a buzzer 515.
Further, the functions of each system are communicated with the functions of each module in the above embodiments, and reference may be made to the above method and apparatus embodiments.
For the human body sensing detection system 506, a human body sensing function is added to the original smoke sensing detector, namely a pyroelectric infrared sensor is used. The human body induction system is a judging system for judging whether the whole set of system is started or not, when people are detected in a kitchen, the whole set of system is not started, and when no people are detected in the kitchen, the smoke detection system is started.
The pyroelectric infrared sensor is mainly a detection element with the size of 2 x 1mm made of a material with high thermoelectric coefficient, such as lead zirconate titanate ceramic, lithium tantalate, triethylene-sulfate and the like. One or two detecting elements are arranged in each detector, and the two detecting elements are connected in series with reversed polarity to suppress interference caused by self temperature rise. The infrared radiation detected and received by the detecting element is converted into weak voltage signal, amplified by the field effect tube in the probe and output. In order to improve the detection sensitivity of the detector and increase the detection distance, in the embodiment, a fresnel lens is arranged in front of the detector, the lens is made of transparent plastic, the upper part and the lower part of the lens are respectively divided into a plurality of equal parts, and the lens with a special optical system is manufactured, and is matched with an amplifying circuit to amplify a signal by more than 70 decibels, so that the movement of a person within the range of 20 meters can be measured.
The Fresnel lens utilizes the special optical principle of the lens to generate a blind area and a high-sensitivity area which are alternately changed in front of the detector so as to improve the detection receiving sensitivity of the Fresnel lens. When someone passes through the lens, infrared rays emitted by a human body continuously and alternately enter a high-sensitivity region from a blind region, so that received infrared signals are input in a pulse mode of strength and weakness, and the energy amplitude of the infrared signals is strengthened.
The infrared sensor has the advantages that ① small animal interference is prevented, the detector is installed at the recommended use height and generally does not give an alarm to small animals on the ground in the detection range, ② electromagnetic interference is prevented, the electromagnetic wave interference resistance of the detector meets the requirement of 4.6.1 in GB10408, the electromagnetic interference of a mobile phone does not cause light interference, the detector is irradiated by a halogen lamp H4 outside 3 meters in the normal sensitivity range and does not give an alarm, the transverse sensitivity of the infrared sensor to a human body is greatly related to the motion direction of the infrared, the radial movement response of the infrared sensor is most important for the transverse sensitivity of the infrared sensor to the human body, and the vertical movement response sensitivity of the pyroelectric sensor is most important for the detection of a vertical movement radius of the pyroelectric probe (namely, the false alarm is avoided).
The infrared signal emitted by human body is detected and converted into electric signal to be output. The rectangular window at the top of the sensor is provided with the optical filter, so that infrared rays with wavelengths of 9-10 microns emitted by a human body can pass through the optical filter, and infrared rays with other wavelengths are filtered out, and the anti-interference capability is improved. In a specific embodiment, if someone approaches the pyroelectric infrared sensor, the sensor receives an infrared signal of 9-10 μm emitted from the human body, and outputs a corresponding electrical signal to be sent to an amplifying circuit on the module for processing, the signal is amplified, shaped and the like, and then sent to the MCU micro-control unit 511, and the MCU micro-control unit 511 analyzes and processes the information to determine whether someone is present in the room. The whole working process does not emit any ray outwards, so that the human body cannot be injured. In order to increase the detection sensitivity, such an infrared sensor module is equipped with a fresnel lens.
The novel NB smoke detector for the kitchen changes the original smoke alarm mechanism into a detection mechanism. When the human body induction system judges that no person exists in the kitchen, the smoke detection system is started, when the smoke concentration in the environment is detected to exceed the standard value, the smoke detection system uploads detection information to the MCU control system, and the temperature detection system is started by the control system to perform next judgment.
For the temperature detection system 508 in this embodiment, a temperature sensor is added to the smoke detector in this embodiment based on the original configuration. The temperature sensing system is an important system for determining whether to turn on the combustible gas system and confirming the occurrence of a fire. The temperature detection system determines the ambient temperature, and when the ambient temperature is higher than 40 ℃ (the set temperature threshold can be revised as required), the temperature sensor 509 directly transmits the fire information to the MCU micro-control unit 511. And when the ambient temperature is lower than 40 ℃, starting the combustible gas detection system, and judging whether the gas leakage of the overflowing boiler or the fire occurs by the combustible gas detection system.
Temperature sensors can be classified into two broad categories, contact and non-contact, depending on the measurement mode.
First, contact. The detection part of the contact temperature sensor is in good contact with a measured object, and is also called as a thermometer. The thermometer reaches thermal equilibrium through conduction or convection, so that the indication value of the thermometer can directly represent the temperature of the measured object, and the measurement precision is higher generally. The thermometer can also measure the temperature distribution inside the object within a certain temperature measuring range. However, a large measurement error occurs in a moving body, a small target, or an object having a small heat capacity, and commonly used thermometers include a bimetal thermometer, a glass liquid thermometer, a pressure type thermometer, a resistance thermometer, a thermistor, a thermocouple, and the like. They are widely used in industrial, agricultural, commercial, etc. sectors. These thermometers are also commonly used by people in everyday life.
Second, contactless. Its sensitive element and tested object are not contacted with each other, also called non-contact thermometric instrument. Such a meter can be used to measure the surface temperature of moving objects, small targets and objects with small heat capacities or fast temperature changes (transients), and also to measure the temperature distribution of the temperature field. The most commonly used non-contact thermometers are based on the fundamental law of blackbody radiation, known as radiation thermometers. The radiation temperature measurement methods can only measure the corresponding photometric temperature, radiation temperature or colorimetric temperature. The temperature measured is only true for a black body (an object that absorbs all radiation and does not reflect light). If the true temperature of the object is to be measured, a correction of the surface emissivity of the material must be made. And the surface emissivity of the material is not only dependent on temperature and wavelength, but also related to surface state, coating film, microstructure, etc., and thus it is difficult to accurately measure. The advantage of a contactless temperature sensor is that the upper measurement limit is not limited by the temperature resistance of the temperature-sensitive element, so that there is in principle no limit to the maximum measurable temperature.
Preferably, a non-contact temperature sensor is selected in this embodiment. When the environmental temperature rises to 40 ℃, the thermosensitive element in the detector is subjected to physical change, the temperature signal is converted into an electric signal, the electric signal is transmitted to the MCU 511 for analysis and processing, after analysis, the analog quantity information is uploaded to an NB base station of an operator through the NB-IOT module 502, then the analog quantity information is uploaded to a cloud platform through the NB-IOT module, and the cloud platform sends the information to a mobile phone end, so that the environmental fire condition can be monitored by the temperature sensor, and the whole process of informing a user is realized. And when the ambient temperature is lower than 40 ℃, starting the combustible gas detection system.
For the combustible gas detection system 504, the smoke detector provided by the embodiment of the invention is added with a CO sensor. The combustible gas detection system is used as a final detection unit and can determine whether the alarm type is an overflow combustible gas leakage alarm or a fire alarm. When one alarm type is determined, the combustible gas detection system transmits information to the MCU 511, and after analysis and processing, the NB-IOT communication module uploads the equipment information to the cloud platform.
When the kitchen overflows and the fire on the gas stove is extinguished, the gas can be directly leaked into the air, the main component of the gas is carbon monoxide, and the carbon monoxide is a toxic gas, so that the gas can generate shock for a human body, and once the CO reaches the explosion limit in a closed environment, the gas can be immediately exploded when meeting an open fire. The carbon monoxide gas sensor is a core detection element in a combustible gas detection system, and takes fixed potential electrolysis as a basic principle. When carbon monoxide diffuses to the gas sensor, the output end of the gas sensor generates current output which is provided for a sampling circuit in the alarm to play a role of converting chemical energy into electric energy. When the gas concentration changes, the output current of the gas sensor also changes in direct proportion, and the output is converted and amplified by an intermediate circuit of the alarm to drive different execution devices to complete the detection and alarm functions of sound, light, electricity and the like, and the environment detection or monitoring alarm system is formed together with a corresponding control device.
The principle of the electrochemical carbon monoxide sensor is as follows: when carbon monoxide gas diffuses to the working electrode surface through the gas hole on the outer shell and the gas-permeable membraneIn the face, the carbon monoxide gas is oxidized at the working electrode under the catalytic action of the working electrode. The chemical reaction formula is as follows: CO + H2O→CO2+2H++2e-
H + ions and electrons generated by the oxidation reaction on the working electrode are transferred to a counter electrode which keeps a certain interval with the working electrode through the electrolyte and generate reduction reaction with oxygen in water. The chemical reaction formula is as follows:
1/2O2+2H++2e-→H2O
thus, a reversible oxidation-reduction reaction occurs inside the sensor. The chemical reaction formula is as follows:
2CO+2O2→2CO2
this reversible oxidation-reduction reaction occurs all the time between the working electrode and the counter electrode, and a potential difference is generated between the electrodes.
Preferably, in the embodiment, a carbon monoxide sensor with a range of 0-2000 ppm can be selected for detection. The service life is 2 years in the air, and the quality guarantee period is 18 months after delivery.
Referring to fig. 5 to 6, a housing 61 of the smoke detector provided in the embodiment of the present invention is provided with: combustible gas inlet hole 611, pyroelectric infrared sensor + Fresnel lens hole 612, temperature sensor hole 613, smoke labyrinth upper cover 614, LED indicator lamp 512, self-checking/silencing button 514 and buzzer sounding hole 615.
Still taking the kitchen as an example, the alarm principle of the embodiment of the invention can be as follows: the alarm principle is as follows: through pyroelectric infrared sensor, whether detect someone in the kitchen, if the kitchen someone, then smog detecting system, temperature detecting system, combustible gas detecting system do not all start. When the pyroelectric sensor detects that no person exists in the kitchen, the smoke detection system is started, the phenomenon of pot overflow is assumed to occur at the moment, after the smoke detection system is started, smoke in the kitchen is detected, the temperature detection system is started again, after the smoke detection system is started, the temperature is detected to be lower than 40 ℃, the combustible gas detector system is started, when the concentration of the combustible gas detector in the environment is detected to exceed the alarm concentration, the device judges that the phenomenon of pot overflow occurs in the kitchen, and the alarm is notified. When the pyroelectric sensor detects that no person exists in the kitchen, the smoke detection system is started, and if no fire disaster exists in the kitchen, the smoke detection system does not detect smoke in the kitchen after being started, the system does not transmit information, and the temperature alarm system is not started. When the pyroelectric sensor detects that no person exists in a kitchen, the smoke detection system is started, a fire disaster exists in the kitchen, smoke is detected after the smoke detection system is started, the temperature detection system is started, if the temperature alarm system detects that the temperature is lower than 40 ℃, the combustible gas detector system is started, the concentration of combustible gas in the environment does not reach the alarm condition, the whole system judges that the fire disaster occurs in the place, and alarm information is uploaded. If the temperature alarm system detects that the ambient temperature rapidly rises within a short time or the temperature rises to an alarm value of over 40 ℃ already in a differential temperature detection mode, the temperature alarm system uploads alarm information to inform a user that a fire disaster occurs in a kitchen.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method of smoke detection, comprising:
acquiring a smoke concentration value of a target environment;
judging whether the smoke-feeling concentration value is larger than a calibrated smoke-feeling threshold value or not;
if the smoke intensity value is larger than the calibrated smoke intensity threshold value, acquiring a temperature value of the target environment;
judging whether the temperature value is greater than a temperature threshold value;
if the temperature value is larger than the temperature threshold value, triggering a fire alarm to alarm;
if the temperature value is not greater than the temperature threshold value, acquiring a combustible gas concentration value in the target environment;
judging whether the concentration value of the combustible gas exceeds a combustible gas concentration threshold value;
and if the concentration value of the combustible gas exceeds the concentration threshold value of the combustible gas, triggering a pot overflow alarm.
2. The method of claim 1, further comprising, prior to said obtaining a smoke concentration value for a target environment:
detecting whether a human body exists in the target environment;
the obtaining of the smoke concentration value in the target environment is:
and if the human body is not detected to exist in the target environment, acquiring a smoke feeling concentration value in the target environment.
3. The method of claim 1, further comprising:
acquiring a wind speed value in the target environment;
judging whether the wind speed value exceeds a wind speed threshold value;
and if the concentration value exceeds the preset value, increasing the smoke concentration value and/or the combustible gas concentration value according to a preset rule.
4. The method of claim 1, further comprising:
and if the concentration value of the combustible gas does not exceed the concentration threshold value of the combustible gas, triggering low-temperature alarm.
5. The smoke detector of claim 1, further comprising:
acquiring the time length that the smoke-sensitive concentration value is greater than the calibrated smoke-sensitive threshold value;
judging whether the duration is greater than a duration threshold value;
and if the time length is greater than the time length threshold value, sending warning information to a preset terminal.
6. A smoke detection device, comprising: the device comprises a smoke detection module, a control module, a temperature detection module, a combustible gas concentration detection module and an alarm module;
the smoke detection module is used for acquiring a smoke concentration value of a target environment and sending the smoke concentration value to the control module;
the control module is used for receiving and judging whether the smoke-sensitive concentration value is greater than a calibrated smoke-sensitive threshold value or not, and sending a first trigger signal to the temperature detection module when the smoke-sensitive concentration value is greater than the calibrated smoke-sensitive threshold value; the temperature sensor is also used for receiving the temperature value of the target environment, judging whether the temperature value of the target environment is greater than a temperature threshold value or not, and sending a second trigger signal to the combustible gas concentration detection module when the temperature value is not greater than the temperature threshold value; the temperature sensor is also used for sending a fire alarm trigger signal to the alarm module when the temperature value is greater than the temperature threshold value; the system is also used for receiving a combustible gas concentration value sent by the combustible gas concentration detection module, judging whether the combustible gas concentration value exceeds a combustible gas concentration threshold value, and sending a pot overflow prompting trigger signal to the alarm module when the combustible gas concentration value exceeds the combustible gas concentration threshold value;
the temperature detection module is used for acquiring a temperature value of the target environment after receiving the first trigger signal and sending the temperature value of the target environment to the control module;
the combustible gas concentration detection module is used for acquiring a combustible gas concentration value in the target environment after receiving the second trigger signal and sending the combustible gas concentration value to the control module;
and the alarm module is used for carrying out fire alarm after receiving the fire alarm trigger signal and carrying out pot overflow alarm after receiving the pot overflow prompt trigger signal.
7. The smoke detector of claim 6, further comprising: a human body detection module;
the human body detection module is used for detecting whether a person exists in the target environment, outputting human body detection information and sending the human body detection information to the control module;
the control module is further configured to receive the human body detection information, and send a closing indication signal to the smoke detection module when the human body detection information indicates that a human body exists in the target environment; when the human body detection information indicates that no human body exists in the target environment, sending an opening indication signal to the smoke detection module;
the smoke detection module is also used for receiving the closing indication signal or the opening indication signal sent by the control module and carrying out closing or opening operation.
8. The apparatus of claim 6, further comprising: a wind speed detection module;
the wind speed detection module is used for acquiring a wind speed numerical value in the target environment and sending the wind speed numerical value to the control module;
the control module is further configured to receive the wind speed value sent by the wind speed detection module, determine whether the wind speed value exceeds a wind speed threshold, and increase the smoke concentration value and/or the combustible gas concentration value according to a preset rule when the wind speed value exceeds the wind speed threshold.
9. The apparatus of claim 6, further comprising: a timing module;
the timing module is used for acquiring the duration information that the smoke detection concentration value is greater than the calibrated smoke detection threshold value and sending the duration information to the control module;
the control module is further configured to receive the duration information sent by the timing module, determine whether the duration is greater than a duration threshold, and send warning information to a preset terminal when the duration is greater than the duration threshold.
10. A smoke detector, comprising: comprising a memory for storing a computer program and a processor for executing the computer program for implementing the method for smoke detection for a target environment according to any of claims 1-5.
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| CN115290135B (en) * | 2022-07-21 | 2023-04-25 | 中成空间（深圳）智能技术有限公司 | Intelligent fireproof monitoring method and system applied to air film system |
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