CN111179561A - Kitchen ignition monitoring and judging method and kitchen fire monitoring and judging method - Google Patents
Kitchen ignition monitoring and judging method and kitchen fire monitoring and judging method Download PDFInfo
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- CN111179561A CN111179561A CN201911345597.2A CN201911345597A CN111179561A CN 111179561 A CN111179561 A CN 111179561A CN 201911345597 A CN201911345597 A CN 201911345597A CN 111179561 A CN111179561 A CN 111179561A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
- G08B21/24—Reminder alarms, e.g. anti-loss alarms
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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
- G08B17/06—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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Abstract
The invention relates to a kitchen ignition and fire monitoring and judging method, which comprises the following steps: starting an ultrasonic detection module according to a preset detection condition and acquiring ultrasonic data detected by a preset monitoring space for continuous preset times, wherein the ultrasonic data comprises echo time and an echo intensity value corresponding to the echo time; acquiring environmental parameters including temperature data; and judging whether a fire source exists or whether an existing fire is abnormal or not according to the intensity of change of the echo intensity value and the temperature data. The invention has the advantages that the invention can be applied to the application scenes of cooking, cooking and the like in kitchens and the like, can monitor the state of the fire source, judge the conditions of ignition, dry heating, flameout and the like, and timely inform the user when the abnormal conditions of dry heating, stove fire extinguishing and the like occur, thereby avoiding the further deterioration of the conditions and ensuring the life and property safety of the user.
Description
Technical Field
The invention relates to the field of household fire safety, in particular to a kitchen ignition monitoring and judging method and a kitchen fire monitoring and judging method.
Background
Among the various disasters, fire is one of the main disasters that threaten public safety and social development most often and most generally. In a common household, the most possible causes of fire are short circuit of electric appliances and kitchen fire, and for short circuit of the electric appliances, the short circuit of most electric appliances can be avoided as long as the electric appliances meeting the standard and the safety standard are purchased; the kitchen fire is usually most carefully treated, no accident happens when people are in the kitchen, but people often leave the kitchen to do other things during cooking, forget to shut off the fire in time, if yes, dry burning is caused to scrap kitchen ware, and if not, fire hazard threatens life and property safety.
Especially, some elderly people living alone have poor memory for physical reasons, and if people need to cook and cook food by themselves and worry about other things, such events are very likely to happen, so how to monitor the kitchen fire is a problem to be solved urgently.
Disclosure of Invention
In order to avoid the defects of the background art, the invention provides kitchen fire source state monitoring equipment, and also provides a kitchen ignition monitoring and judging method and a kitchen fire monitoring and judging method, which can effectively monitor the ignition and fire using conditions of personnel in a kitchen and remind a user when abnormal conditions occur.
The invention provides kitchen fire source state monitoring equipment which comprises a shell and a circuit board arranged in the shell, wherein the circuit board comprises a microcontroller module, and a human body infrared sensing module, an ultrasonic detection module, an environmental parameter detection module, a wireless communication module and a sound-light alarm module which are connected with the microcontroller module; the environment parameter detection module is used for detecting current environment parameters and comprises a temperature detection module and a smoke detection module; the human body infrared sensing module is used for detecting whether a person exists; when the preset detection condition is met, the microcontroller module controls the ultrasonic detection module to start detecting the preset monitoring space and obtain ultrasonic data detected for continuous preset times; when people exist, the intensity of the change of the temperature data or the ultrasonic data meets the preset early warning condition, and the microcontroller module controls the wireless communication module to send an early warning signal to the outside; when no one is present, the intensity of the ultrasonic data changes and the environmental parameters meet the preset alarm conditions, the microcontroller module controls the sound-light alarm module to externally send sound-light alarms and controls the wireless communication module to externally send alarm signals.
Further, the environmental parameter detection module further comprises at least one of a gas detection module, a humidity detection module and a noise detection module.
The invention also provides a kitchen ignition monitoring and judging method, which comprises the following steps:
awakening the equipment according to a preset awakening condition, wherein the preset awakening condition is that the induced personnel or the dormancy accumulated time length reaches a preset time length;
starting an ultrasonic detection module and acquiring ultrasonic data detected by a preset number of continuous times in a preset monitoring space, wherein the ultrasonic data comprises echo time and an echo intensity value corresponding to the echo time;
judging and determining the activity of people according to the ultrasonic data;
judging and determining the currently detected personnel;
acquiring temperature data, wherein the temperature data comprises real-time temperature and background environment temperature;
judging and determining that the temperature data meets a preset early warning condition;
and judging that the fire source exists currently.
Further, the temperature data further comprises a background temperature rise value and a temperature rise rate; the temperature data meets the preset early warning conditions as follows: the background temperature rise value reaches a preset value or the temperature rise rate reaches a preset value.
And further, in the step of judging and determining that the temperature data meets the preset early warning condition, if the temperature data does not meet the preset early warning condition, returning to the step of judging and determining that the personnel are detected.
Further, in the step of judging and determining the currently detected person, if no person is detected, the following steps are performed:
starting an ultrasonic detection module and acquiring ultrasonic data detected by a preset number of continuous times in a preset monitoring space, wherein the ultrasonic data comprises echo time and an echo intensity value corresponding to the echo time;
judging and determining that the intensity of change of the echo intensity value meets a preset early warning condition;
and judging that the fire source exists currently.
Further, determining how strongly the echo intensity values change includes:
determining peak values of all wave crests in each ultrasonic data, which are greater than a preset echo intensity value;
determining the variance of peak values corresponding to the same or similar echo time in the ultrasonic data for multiple times;
and determining the proportion of the peak value variance quantity of the wave peaks larger than the preset variance value to the total peak value variance quantity of the wave peaks.
The invention also provides a kitchen fire monitoring and judging method, which comprises the following steps:
acquiring environmental parameters, wherein the environmental parameters comprise temperature data and smoke concentration data;
judging and determining that no personnel are detected currently;
judging and determining that the current detection condition is met;
starting an ultrasonic detection module and acquiring ultrasonic data detected by a preset number of continuous times in a preset monitoring space, wherein the ultrasonic data comprises echo time and an echo intensity value corresponding to the echo time;
judging and determining the intensity of change of the echo intensity value and the environmental parameter according with the preset alarm condition;
judging that the current existing fire is abnormal;
and sending sound and light alarm or alarm signal to the outside.
Further, the temperature data comprises real-time temperature, background temperature of the fire and temperature rise value of the fire; the preset detection conditions are that the unmanned time reaches the preset time, the fire temperature rise value reaches the preset dangerous value or the smoke concentration reaches the preset dangerous value.
Preferably, the step of judging and determining the intensity of change of the echo intensity value and the environmental parameter meeting the preset alarm condition comprises: the intensity of change of the echo intensity value reaches a preset alarm value, the fire temperature rise value reaches the preset alarm value, and the smoke concentration reaches the preset alarm value.
Further, the environmental parameters also comprise humidity data and gas concentration data; the preset detection condition can also be that the humidity is lower than a preset dangerous value and the gas concentration reaches the preset dangerous value; the steps of judging and determining the intensity degree of the change of the echo intensity value and the environmental parameter according with the preset alarm condition further comprise: the intensity of change of the echo intensity value reaches a preset alarm value, the fire temperature rise value reaches a preset alarm value, the smoke concentration reaches a preset alarm value, and the humidity is lower than the preset alarm value, or the intensity of change of the echo intensity value reaches the preset alarm value, the fire temperature rise value reaches a preset danger value, and the smoke concentration reaches a preset danger value, or the intensity of change of the echo intensity value is lower than the preset early warning value, the fire temperature rise value is a negative value, and the gas concentration reaches the preset alarm value.
The invention also provides fire source state monitoring equipment, which comprises a memory for storing programs and a processor for executing the programs, wherein the programs realize the steps of the method when being executed by the processor.
The invention has the advantages that the invention can be applied to the application scenes of cooking, cooking and the like in kitchens and the like, can monitor the state of the fire source, judge the conditions of ignition, dry heating and the like, and inform the user in time when abnormal conditions of dry heating, stove fire extinguishing and the like occur, thereby avoiding the further deterioration of the conditions and ensuring the life and property safety of the user.
Drawings
Fig. 1 is a schematic view of constituent modules of a kitchen fire source state monitoring device in embodiment 1.
FIG. 2 is a waveform diagram of ultrasonic data obtained when the device is detected 1 meter from a fire source.
FIG. 3 is a waveform diagram of ultrasonic data obtained when the device is tested 2 meters from a fire source.
Fig. 4 is a schematic flow chart of the kitchen ignition monitoring and determining method in embodiment 2.
FIG. 5 is a schematic flow chart of a kitchen fire monitoring and determining method according to embodiment 3.
Detailed Description
The invention is further described below with reference to the accompanying drawings and specific examples.
Embodiment 1, referring to fig. 1 to 3, a kitchen fire source state monitoring device includes a housing and a circuit board disposed inside the housing, where the circuit board includes a microcontroller module 101, and a human body infrared sensing module 102, an ultrasonic detection module 103, an environmental parameter detection module 104, a wireless communication module 105, and an audible and visual alarm module 106 connected to the microcontroller module 101; the environmental parameter detection module 104 is used for detecting current environmental parameters and comprises a temperature detection module, a smoke detection module, a gas detection module and a humidity detection module; the human body infrared sensing module 102 is used for detecting whether a person exists; when the preset detection condition is met, the microcontroller module 101 controls the ultrasonic detection module 103 to start detecting the preset monitoring space and obtain ultrasonic data detected for continuous preset times; when people exist, the intensity of the change of the temperature data or the ultrasonic data meets the preset early warning condition, the equipment judges that a fire source exists at present, and the microcontroller module 101 controls the wireless communication module 105 to send an early warning signal to the outside; when no one is present, the intensity of the change of the ultrasonic data and the environmental parameters including one or more of temperature data, smoke concentration data, gas concentration data and humidity data meet the preset alarm condition, the device judges that the existing fire is abnormal at the moment, the microcontroller module 101 controls the sound-light alarm module 106 to externally send a sound-light alarm to remind a user, and controls the wireless communication module 105 to externally send an alarm signal to remotely alarm.
In this embodiment, the environmental parameter detecting module 104 further includes a noise detecting module besides the above detecting module, and the noise detecting module can be used to assist in judging whether there is a fire source currently.
The traditional ultrasonic ranging equipment can only detect whether reflected ultrasonic waves exist or not after the ultrasonic waves are transmitted, namely reflected echoes, on the basis of the principle, when the ultrasonic transmitter transmits the ultrasonic waves to a certain direction, timing is started at the same time of transmitting time, the ultrasonic waves are transmitted in the air and return immediately when encountering obstacles on the way, the ultrasonic receiver immediately stops timing after receiving the reflected echoes to obtain echo time, and the distance between the ultrasonic ranging equipment and a nearest object can be calculated according to a sound velocity and echo time formula. The ultrasonic equipment adopted in the invention can also detect the intensity value of the reflected ultrasonic wave, namely the echo intensity value on the basis, when the ultrasonic transmitter transmits the ultrasonic wave to a certain object or area, and the ultrasonic receiver does not stop timing when receiving the reflected echo, so as to obtain the echo intensity value and the echo time; because the ultrasonic wave has a large beam angle, a plurality of reflection points capable of reflecting the ultrasonic wave may exist on the surface of an object within the beam angle range, and the distance between the reflection points and the ultrasonic equipment is large or small, so that the ultrasonic equipment can continuously detect the echo intensity value corresponding to the echo time along with the increase of the echo time. The magnitude of the echo intensity value depends on the total number of reflection points at the same reflection distance (or the same echo time).
For convenience of understanding, the echo time is taken as the horizontal axis and the echo intensity value is taken as the vertical axis to form a visible and intuitive waveform diagram by taking the figure 2 as an example. When the ultrasonic equipment transmits ultrasonic waves to an object existing in a preset background environment, due to factors such as the angle, the shape and the size of the object, echoes are easily formed at certain areas, such as the corners of the object, the concave surfaces of the surface of the object and the like, so that wave peaks of echo intensity values appear at echo time positions corresponding to the areas in a oscillogram, the corresponding peak values of the wave peaks are reflection strong points in the preset background environment under the normal condition, and if the preset background environment does not change, the reflection strong points cannot change; and certain area parts do not or rarely form echoes, so that the echo intensity value at the echo time corresponding to the area parts in the oscillogram tends to zero.
The device of the embodiment can be installed above a kitchen, and the probe of the ultrasonic detection module 103 faces a gas stove. When the device is in a low-power standby state during normal use, the device waits for the induction of a human body to wake up again or wake up regularly according to a wake-up period, and after the wake-up, the ultrasonic detection module 103 is started for continuous preset times to detect a preset monitoring space and obtain an echo intensity value comprising echo time and corresponding to the echo time. Fig. 2 to 3 can be referred to as waveform diagrams of ultrasonic data obtained by the apparatus of this embodiment, where fig. 2 is data obtained by detecting the apparatus one meter away from a fire source, fig. 3 is data obtained by detecting the apparatus two meters away from the fire source, each ultrasonic waveform diagram is formed by superimposing ultrasonic data obtained by continuously presetting times after the ultrasonic detection module 103 is started, the abscissa is echo time (or echo distance), and the ordinate is echo intensity value. It can be seen that, in the background situation, that is, in the absence of a fire source, the intensity of change in the echo intensity value at the peak is small, and in other situations of ignition, boiling, and drying, the intensity of change in the echo intensity value at the peak is large, and whether a fire source exists can be determined by analyzing and calculating the intensity of change in the peak in each round of ultrasonic data (each round of ultrasonic data obtained after each start of the ultrasonic detection module 103).
Because the existence of personnel can interfere ultrasonic data, the wave crest movement condition taking echo time as a reference appears in an ultrasonic wave oscillogram, and whether the fire source actually exists is judged through two angles: firstly, under the condition of someone, the real-time temperature is obviously increased compared with the ambient temperature after the ignition of a user through the judgment of temperature data; secondly, if the fire is not ignited all the time under the condition of people, the ultrasonic detection module is started to judge through ultrasonic data after the people leave, if the intensity of change of the ultrasonic data meets the preset early warning condition, the fire source in the current environment is judged to exist, otherwise, the fire source is considered to be absent. If a fire source is detected, the equipment enters an early warning state and sends an early warning signal to the service platform; if the fire source is not detected, the device enters a sleep state to wait for waking up again.
Before the fire source disappears, the device can be always in an early warning state, if the user leaves the kitchen in the early warning state, namely the device cannot sense people, the device can start the ultrasonic detection module 103 to detect according to preset detection conditions, for example, the unmanned duration reaches the preset time, or a certain environmental parameter reaches a preset alarm value. The environmental parameters are determined according to the function of a detection module of the equipment, the temperature, the humidity, the smoke concentration, the gas concentration and the noise decibel can be realized, the equipment can judge whether the current environment is abnormal when the fire occurs through the combination of ultrasonic data and multidimensional environmental parameters, if yes, an audible and visual alarm is sent out to remind a user, and an alarm signal is sent to a service platform to carry out remote alarm. The service platform end further informs related management personnel, and the related management personnel can communicate with the user by telephone to confirm whether hidden danger is eliminated.
There are several fire abnormalities: dry burning, flameout and fire hazard, when the dry burning occurs, the kitchen environment will be accompanied by the changes of temperature rise, humidity reduction and the like, if the dry burning condition is further serious, stronger smoke can be generated; when the stove fire is extinguished due to the overflowing cooking liquor, the kitchen environment is accompanied with the increase of the gas concentration and the reduction of the temperature, and the intensity of the change of the ultrasonic wave is automatically weakened. When the user finishes cooking and leaves the kitchen, the equipment can start ultrasonic detection according to preset detection conditions, and when the intensity of change of ultrasonic data is lower than the preset early warning conditions and the environmental parameters tend to be normal, the equipment can enter a dormant state. In this embodiment, the noise decibel can assist judgement personnel's ignition and flame-out effect, and general personnel all can be along with opening or closing the lampblack absorber when igniteing and flame-out, and lampblack absorber equipment can produce great noise, and the emergence of noise or disappearance can assist the judgement ignition or flame-out.
The principle that the fire source can cause the fluctuation of ultrasonic data in the invention is as follows: the characteristics of ultrasonic data can be seen from a background oscillogram to have small fluctuation; secondly, the surrounding air is heated by the flame, so that the hot air rises and the cold air falls to form thermal convection, the fluctuation of ultrasonic data can be influenced and amplified due to the existence of the thermal convection, and the more violent the thermal convection, the larger the influence of the ultrasonic is; in addition to air around the flame, the ultrasonic waves are affected by the water vapor that is continuously evaporated from the boiling liquid in the cookware.
The device can be installed in a kitchen or a similar application scene, can monitor the state of a fire source, judges the conditions of ignition, dry burning and the like, and timely informs a user when abnormal conditions of dry burning, stove fire extinguishing and the like occur, so that further deterioration of the conditions is avoided, and the life and property safety of the user is ensured.
Embodiment 2, with reference to the accompanying drawings, 2 to 4, a kitchen ignition monitoring and determining method, which is applicable to the kitchen fire source state monitoring device of embodiment 1, includes:
s201, waking up the equipment according to a preset wake-up condition, wherein the preset wake-up condition comprises that the equipment senses personnel or the accumulated dormancy duration reaches a preset duration; in the step, the device is awakened when sensing a human body through pyroelectric infrared rays or is awakened regularly according to an awakening period, and enters a normal working state from a low-power-consumption dormant state.
S202, starting an ultrasonic detection module and acquiring ultrasonic data detected by a preset number of continuous times in a preset monitoring space, wherein the ultrasonic data comprises echo time and an echo intensity value corresponding to the echo time; in the step, the ultrasonic detection module is started to detect the preset monitoring space after the equipment is awakened, ultrasonic waves are sent outwards for multiple times during the starting period, short time intervals exist between every two sending, the time intervals are used for receiving the echo of the ultrasonic waves to obtain the ultrasonic data, and the ultrasonic data can be obtained by sending the ultrasonic waves for multiple times.
S203, judging whether a person moves according to the ultrasonic data, if so, entering a step S204, otherwise, entering the dormant state again; the purpose of this step is to verify whether the person sensed by infrared in step S201 is a false trigger, and with the existing human body infrared sensing technology, there may be a situation that there is no person but a false trigger, so it is necessary to further determine whether there is a person by ultrasonic data; if the device is triggered by a person, when the device senses the person, the person is in a far position and moves towards the direction of the device, and at the moment, the ultrasonic detection module starts to detect the obtained and formed ultrasonic data oscillogram, so that a moving wave peak condition occurs; after the equipment is triggered and awakened, whether a person enters the kitchen or not can be judged according to whether the mobile wave crest exists or not.
S204, judging whether a person is detected currently, if so, entering a step S205, otherwise, entering a step S209;
the fire source can change and influence the environment, which is embodied in two aspects, namely that the real-time temperature continuously rises until the temperature tends to a certain stable value, and meanwhile, the temperature rise rate jumps to a certain value and then slowly tends to zero; secondly, thermal convection is generated, which influences the propagation of ultrasonic waves and makes the change of the echo intensity value more severe; according to the two characteristics, the fire source detection device can be used for judging the existence of the fire source when people exist and when no people exist respectively; in the step, if a person exists, the step S205 is carried out, and the temperature data acquired by the equipment has certain hysteresis through the judgment of the temperature data, so that the equipment is suitable for the situation of the person; and step S209 is carried out when no person is present, and the ultrasonic data is judged according to the ultrasonic data, so that the ultrasonic data has no interference of personnel, and the ultrasonic detection is relatively good in timeliness and is suitable for the situation that no person is present after the personnel leave.
S205, acquiring temperature data, wherein the temperature data comprises background environment temperature, real-time temperature, a background temperature rise value and a temperature rise rate; in the invention, the temperature data comprises background environment temperature, fire environment temperature, real-time temperature, background temperature rise value, fire temperature rise value and temperature rise rate, wherein the background environment temperature is a temperature value obtained when no fire source exists, the fire environment temperature is a temperature value obtained after a fire source exists and the temperature is stable, the background temperature rise value is a temperature value obtained by subtracting the background environment temperature from the real-time temperature, the fire temperature rise value is a temperature value obtained by subtracting the fire environment temperature from the real-time temperature, and the temperature rise rate is a temperature change value in unit time.
S206, judging whether the temperature data meet preset early warning conditions, if so, entering step S207, otherwise, returning to step S204; in the temperature data, the temperature rise value and the temperature rise rate are two relatively opposite data, and the temperature rise rate is lower and lower as the temperature rise value is higher and higher.
S207, judging that the fire source exists currently.
S208, sending an early warning signal to the outside; in the step, when the equipment judges that the fire source exists, an ignition early warning signal is sent to the service platform, and the main purpose is to enable the service platform to record the ignition time of a user.
S209, starting an ultrasonic detection module and acquiring ultrasonic data detected by a preset number of continuous times in a preset monitoring space; this step is the same as step S202.
S210, judging whether the intensity of the change of the echo intensity value meets a preset early warning condition, if so, entering step S207, otherwise, entering a dormant state and waiting for awakening; the method comprises the steps of detecting the personnel at the last time after the personnel leave, if the intensity of change of the echo intensity value meets the preset early warning condition, indicating that the personnel ignite a fire source before leaving, and otherwise indicating that the equipment does not enter a dormant state;
in step S210, the intensity of the change in the echo intensity value can be determined by:
determining each peak value (obtaining a plurality of peak values) which is larger than a preset echo intensity value in each ultrasonic data;
determining the variance of peak values corresponding to the same or similar echo time in the ultrasonic data for multiple times (obtaining the variance of a plurality of peak values);
and determining the proportion of the peak value variance quantity of the wave peaks larger than the preset variance value to the total peak value variance quantity of the wave peaks.
And judging whether the intensity of change of the echo intensity value meets a preset early warning condition, namely judging whether the proportion of the peak-to-peak variance number larger than a preset variance value to the total peak-to-peak variance number is larger than a preset early warning proportion.
The method can effectively monitor the activity of personnel in the kitchen and judge whether the user ignites the fire source.
Embodiment 2, with reference to the accompanying drawings, 2 to 4, a kitchen fire monitoring and determining method, which is applicable to the kitchen fire source state monitoring device of embodiment 1, includes:
s301, acquiring environmental parameters, wherein the environmental parameters comprise temperature data, smoke concentration data, gas concentration data and humidity data, and the temperature data comprise fire environment temperature, real-time temperature and fire temperature rise value.
S302, judging whether people are not detected, if so, entering a step S303, and if not, continuing to wait and collecting environmental parameters; the existing human body infrared sensing technology can not be triggered by people unless the equipment module is damaged, so that in the step, the equipment can judge whether the personnel leave the kitchen or not according to the human body infrared sensing.
S303, judging whether the current condition is in accordance with a preset detection condition; in the step, the preset detection conditions are that the unmanned time reaches the preset time, the fire temperature rise value reaches the preset dangerous value, the smoke concentration reaches the preset dangerous value, the humidity is lower than the preset dangerous value or the gas concentration reaches the preset dangerous value.
S304, starting the ultrasonic module and acquiring ultrasonic data detected by the preset continuous times in the preset monitoring space, wherein the ultrasonic data comprises echo time and an echo intensity value corresponding to the echo time.
S305, judging whether the intensity of the change of the echo intensity value meets the preset alarm condition or not, if so, entering the step S306, otherwise, returning to the step S303; in this step, the intensity of the change of the echo intensity value can be determined according to the embodiment 2, and in the absence of human, the following preset alarm conditions, dry burning, extinguishing after the soup overflows, and fire can be judged according to the intensity of the change of the echo intensity value and different environmental parameters,
and (3) during dry burning: the intensity of the change of the echo intensity value is slightly changed, the fire temperature rise value is increased to reach a preset alarm value, the smoke concentration is increased to reach the preset alarm value, and the humidity value is reduced to reach the preset alarm value;
when flameout: the intensity of change of the echo intensity value is reduced, the fire temperature rise value is a negative value (namely the real-time temperature is reduced), and the gas concentration rise reaches a preset alarm value;
in case of fire: the fire temperature rise value and the smoke concentration are obviously increased on the basis of dry burning and respectively reach preset dangerous values.
S306 determines that the currently-used fire is abnormal.
S307, sending an audible and visual alarm to the outside and sending an alarm signal to the outside; in the step, after the fire is judged to be abnormal, the equipment reminds the user through sound and light alarm, sends a corresponding abnormal type alarm signal to the service platform through remote alarm, and the service platform end further informs related management personnel to take corresponding measures.
The method can effectively monitor the fire using condition of the personnel in the kitchen, judge whether the fire using condition of the user is abnormal, and send out sound and light alarm signals to remind the user in time when the fire using condition is abnormal.
In this embodiment, the larger the numerical values of the fire temperature rise value, the smoke concentration, and the gas concentration in the environmental parameters are, the more dangerous the respective preset dangerous values are, the greater the respective preset alarm values are, while the smaller the numerical value of the humidity is, the more dangerous the respective preset dangerous values are, the less dangerous the preset dangerous values are, the less the preset alarm values are.
Although the present invention has been described with reference to preferred embodiments, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and various changes in form and details may be made within the scope of the appended claims.
Claims (10)
1. A kitchen ignition monitoring and judging method is characterized by comprising the following steps:
awakening the equipment according to a preset awakening condition, wherein the preset awakening condition is that the induced personnel or the dormancy accumulated time length reaches a preset time length;
starting an ultrasonic detection module and acquiring ultrasonic data detected by a preset number of continuous times in a preset monitoring space, wherein the ultrasonic data comprises echo time and an echo intensity value corresponding to the echo time;
judging and determining the activity of people according to the ultrasonic data;
judging and determining the currently detected personnel;
acquiring temperature data, wherein the temperature data comprises real-time temperature and background environment temperature;
judging and determining that the temperature data meets a preset early warning condition;
and judging that the fire source exists currently.
2. The kitchen ignition monitoring and determining method of claim 1, wherein the temperature data further comprises a background temperature rise value and a temperature rise rate; the temperature data meets the preset early warning conditions as follows: the background temperature rise value reaches a preset value or the temperature rise rate reaches a preset value.
3. The kitchen ignition monitoring and judging method according to claim 1, wherein in the step of judging and determining that the temperature data meets the preset early warning condition, if the temperature data does not meet the preset early warning condition, the step of judging and determining that the person is detected is returned.
4. The kitchen ignition monitoring and judging method according to claim 1, wherein in the step of judging and determining that a person is currently detected, if no person is detected, the following steps are carried out:
starting an ultrasonic detection module and acquiring ultrasonic data detected by a preset number of continuous times in a preset monitoring space, wherein the ultrasonic data comprises echo time and an echo intensity value corresponding to the echo time;
judging and determining that the intensity of change of the echo intensity value meets a preset early warning condition;
and judging that the fire source exists currently.
5. The kitchen ignition monitoring and determining method of claim 4, wherein the determining the intensity of the change of the echo intensity value comprises:
determining peak values of all wave crests in each ultrasonic data, which are greater than a preset echo intensity value;
determining the variance of peak values corresponding to the same or similar echo time in the ultrasonic data for multiple times;
and determining the proportion of the peak value variance quantity of the wave peaks larger than the preset variance value to the total peak value variance quantity of the wave peaks.
6. A kitchen fire monitoring and judging method is characterized by comprising the following steps:
acquiring environmental parameters, wherein the environmental parameters comprise temperature data and smoke concentration data;
judging and determining that no personnel are detected currently;
judging and determining that the current detection condition is met;
starting an ultrasonic detection module and acquiring ultrasonic data detected by a preset number of continuous times in a preset monitoring space, wherein the ultrasonic data comprises echo time and an echo intensity value corresponding to the echo time;
judging and determining the intensity of change of the echo intensity value and the environmental parameter according with the preset alarm condition;
judging that the current existing fire is abnormal;
and sending sound and light alarm or alarm signal to the outside.
7. The kitchen fire monitoring and judging method according to claim 6, wherein the temperature data comprises real-time temperature, fire background temperature and fire temperature rise value; the preset detection conditions are that the unmanned time reaches the preset time, the fire temperature rise value reaches the preset danger value or the smoke concentration reaches the preset danger value.
8. The kitchen fire monitoring and judging method according to claim 7, wherein the step of judging and determining the intensity of the change of the echo intensity value and the environmental parameter meeting the preset alarm condition comprises the following steps:
the intensity of change of the echo intensity value reaches a preset alarm value, the fire temperature rise value reaches the preset alarm value, and the smoke concentration reaches the preset alarm value.
9. The kitchen fire monitoring and judging method according to claim 7, wherein the environmental parameters further include humidity data, gas concentration data; the preset detection condition can also be that the humidity is lower than a preset dangerous value and the gas concentration reaches the preset dangerous value;
the step of judging and determining the intensity degree of the change of the echo intensity value and the condition that the environmental parameter meets the preset alarm condition further comprises the following steps:
the intensity of change of the echo intensity value reaches a preset alarm value, the temperature rise value reaches the preset alarm value, the smoke concentration reaches the preset alarm value, and the humidity is lower than the preset alarm value, or
The intensity of the change of the echo intensity value reaches a preset alarm value, the temperature rise value of the fire reaches a preset danger value, the smoke concentration reaches a preset danger value, or
The intensity of change of the echo intensity value is lower than a preset early warning value, the fire temperature rise value is a negative value, and the gas concentration reaches the preset warning value.
10. An ignition source condition monitoring apparatus comprising a memory for storing a program and a processor for executing the program, characterized in that: the program when executed by a processor implementing the steps of the method of any one of claims 1 to 9.
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