CN110782630A - A kind of household gas alarm method, system and equipment - Google Patents

Abstract

A household gas alarm method, system and device provided by the present application, the method includes: acquiring detection data of an intelligent gas device; determining a working mode of the intelligent gas device according to the detection data, and generating a corresponding working mode signal; acquiring the working mode signal, and switch the gas alarm mode according to the working mode signal; the application adds the working state of the intelligent gas device to the gas alarm judgment, thereby increasing the accuracy of the gas alarm, and at the same time, the intelligent gas device can use the The sound and light alarm function of the gas detection and alarm device realizes the alarm reminder that no one is in front of the stove for a long time, and further improves the user's gas and fire safety.

Description

A kind of household gas alarm method, system and equipment

technical field

The present application relates to the technical field of indoor gas leakage detection and alarm, and in particular, to a household gas alarm method, system and device.

Background technique

At present, there are many kinds of household gas detection and alarm devices on the market, but basically all the sensors used in the household gas detection and alarm devices are semiconductor sensors. General semiconductor sensors are not only sensitive to methane, but also to interfering gases such as ethanol and acetic acid. According to Chinese cooking habits, the time when a large amount of interfering gases such as ethanol and acetic acid appears in the kitchen is basically when the dishes are fried.

Although the sensitivity characteristic curves of the semiconductor sensor to the interfering gas and methane are different, the changing law of the curve is the same. When the output signal of the sensor changes, it is very difficult to determine the type of the measured gas by the output signal. This is the reason why most of the current household gas detection and alarm devices give false alarms. False alarms will cause users' doubts. Users who often make false alarms will even remove the alarms. Alarms with a high false alarm rate will not only fail to play a role in safety protection, but will cause users to have problems with the gas detection and alarm device. Disgust and distrust.

Therefore, in order to improve the safety level of gas consumption and relieve users' doubts about the false alarm of the alarm, how to reduce the false alarm rate of the household gas detection and alarm device has become an urgent problem to be solved.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present application provides a household gas alarm method, system and device to solve the problems of low safety level and high false alarm rate of the household gas detection and alarm device in the prior art.

In order to solve the above-mentioned technical problems, the present application provides a household gas alarm method, including:

Obtain the detection data of smart gas devices;

Determine the working mode of the intelligent gas device according to the detection data, and generate a corresponding working mode signal;

The working mode signal is acquired, and the gas alarm mode is switched according to the working mode signal.

Preferably, the acquiring the detection data of the smart gas device includes:

Obtain temperature detection data, vibration detection data and human body detection data of smart gas devices.

Preferably, the determining the working mode of the intelligent gas device according to the detection data, and generating the corresponding working mode signal, includes:

Judging whether the temperature detection data and the vibration detection data exceed a preset temperature threshold and a preset vibration threshold, respectively;

If not, generating a first working mode signal;

If so, determine whether there is a person in front of the intelligent gas device according to the human body detection data; if so, generate a second working mode signal; if not, generate a third working mode signal.

Preferably, the determining the working mode of the intelligent gas device according to the detection data, and generating the corresponding working mode signal, further includes:

judging whether the temperature detection data exceeds a preset fire-off temperature;

If yes, then determine whether the unmanned induction time of the human body detection data exceeds a preset time threshold;

If so, it will give an unmanned alarm reminder.

Preferably, the acquiring the working mode signal and switching the gas alarm mode according to the working mode signal includes:

Obtain the detection data of combustible gas;

When acquiring the first working mode signal, determine whether the combustible gas detection data exceeds the preset first concentration threshold, if so, perform an audible and visual alarm and control the gas cut off;

When acquiring the second working mode signal, determine whether the combustible gas detection data exceeds the preset first concentration threshold, if so, acquire combustible gas detection data after a preset time, and determine whether the combustible gas detection data continues to rise, if so , the sound and light alarm and control the gas cut off;

When the third working mode signal is acquired, it is determined whether the combustible gas detection data exceeds the preset first concentration threshold, and if so, an audible and visual alarm is performed and the gas is controlled to be cut off.

Preferably, the acquiring the working mode signal and switching the gas alarm mode according to the working mode signal further includes:

It is judged whether the detection data of the combustible gas exceeds the preset second concentration threshold, and if so, an audible and visual alarm is performed and the gas is controlled to be cut off.

The application also provides a household gas alarm system, including:

Intelligent gas device, gas detection and alarm device and valve cut-off device, the valve cut-off device is installed on the gas pipe in front of the intelligent gas device, the gas detection and alarm device is wirelessly connected with the intelligent gas device, and the gas detection and alarm device is cut off from the valve devices are connected by wire, where,

The intelligent gas device includes a detection module, a first wireless communication module and a first MCU control module, the first MCU control module is connected to the detection module and the first wireless communication module, and the detection module includes a temperature detection module, The vibration detection module and the human body detection module are respectively used for the temperature detection of the stove eye of the intelligent gas device, the vibration detection of the stove, and the detection of human activity, and the first wireless communication module is used for the wireless signal transmission between the gas detection and alarm device and the intelligent gas device;

The gas detection and alarm device includes a gas detection module, a second MCU control module, a second wireless communication module and a peripheral drive module, the second MCU control module and the gas detection module, the second wireless communication module and peripherals The drive module is connected, and the peripheral drive module is connected with the valve cut-off device and used to control the valve cut-off device.

Preferably, the smart gas device further includes a valve driving module, the valve driving module is connected to the first MCU control module, and is used for controlling the valve driving module to drive the valve when the first MCU control module detects that the fire of the smart gas device is abnormally extinguished The solenoid valve in the stove is turned off.

Preferably, the detection module further includes a mechanical switch detection module, the mechanical switch detection module is connected to the first MCU control module, and is used to detect the switch state of the switch knob of the intelligent gas device.

Preferably, the detection module further includes a touch detection module, which is connected to the first MCU control module, and is used for detecting the user's touch input to set the temperature of the stove eye and/or the timing for turning off the ignition.

Preferably, the intelligent gas device further includes a display module, the display module is connected to the first MCU control module, and is used for displaying information on the temperature of the stove eye and/or the time to turn off the ignition according to the touch input.

Preferably, the smart gas device further includes a first power module, and the first power module is used to supply power to the smart gas device.

Preferably, the gas detection and alarm device further includes a second power module, and the second power module is used to supply power to the gas detection and alarm device.

Preferably, the wireless connection between the smart gas device and the gas detection and alarm device adopts ZigBee, Bluetooth or 2.4G communication standard.

Correspondingly, the present invention also provides a household gas alarm device, comprising: an intelligent gas stove and a gas detection alarm, the intelligent gas stove and the gas detection alarm are wirelessly connected, wherein,

The intelligent gas stove includes: a temperature detection sensor, a vibration detection sensor, a human body detection sensor, a display unit, a touch button, and a switch knob, the temperature detection sensor is arranged on the stove eye, and the vibration detection sensor is arranged on the stove eye Beside, the human body detection sensor is arranged on the side of the smart gas stove facing the user, and the display unit, the touch buttons and the switch knob are arranged on the level of the smart gas stove.

The gas detection alarm includes: a gas detection port, an alarm sounding port, an alarm indicator light and a reset mute button.

In this application, the working state of the intelligent gas device is added to the gas alarm judgment, thereby increasing the accuracy of the gas alarm. At the same time, the intelligent gas device can use the sound and light alarm function of the gas detection and alarm device to realize long-term unmanned operation in front of the stove. The alarm reminder further improves the user's gas and fire safety.

Description of drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only It is an embodiment of the present application. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without any creative effort.

1 is a flow chart of a method for alarming a household gas alarm provided by an embodiment of the present application;

2 is a schematic diagram of the connection of a household gas alarm system provided by an embodiment of the present application;

3 is a block diagram of a module of an intelligent gas device provided by an embodiment of the present application;

FIG. 4 is a block diagram of a gas alarm device module provided by an embodiment of the present application;

5 is a circuit structure diagram of a temperature detection module of an intelligent gas device provided by an embodiment of the application;

6 is a circuit structure diagram of a vibration detection module of an intelligent gas device provided by an embodiment of the application;

FIG. 7 is a circuit structure diagram of a human body detection module of an intelligent gas device provided by an embodiment of the application;

8 is a circuit structure diagram of a first wireless communication module of a smart gas device provided by an embodiment of the present application;

9 is a circuit structure diagram of a first MCU control module of a smart gas device provided by an embodiment of the application;

10 is a circuit structure diagram of a mechanical switch detection module of an intelligent gas device provided by an embodiment of the application;

11 is a circuit structure diagram of a touch detection module of a smart gas device provided by an embodiment of the application;

12 is a circuit structure diagram of a display module of an intelligent gas device provided by an embodiment of the application;

13 is a circuit structure diagram of a valve driving module of an intelligent gas device provided by an embodiment of the application;

14 is a circuit structure diagram of a first power supply module of a smart gas device provided by an embodiment of the application;

15 is a circuit structure diagram of a gas detection module of a gas alarm device provided by an embodiment of the application;

16 is a circuit structure diagram of a second MCU control module of a gas alarm device provided by an embodiment of the application;

17 is a circuit structure diagram of a second wireless communication module of a gas alarm device provided by an embodiment of the application;

18 is a circuit structure diagram of a peripheral drive module of a gas alarm device provided by an embodiment of the application;

19 is a circuit structure diagram of a second power module of a gas alarm device provided by an embodiment of the application;

FIG. 20 is a schematic diagram of the external structure of a smart gas stove provided by an embodiment of the application;

FIG. 21 is a schematic diagram of the external structure of a gas detection alarm provided by an embodiment of the application.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Please refer to FIG. 1. FIG. 1 is a flowchart of a household gas alarm method provided by an embodiment of the application. The alarm method 100 includes:

S101: Obtain the detection data of the smart gas device;

S102: Determine the working mode of the intelligent gas device according to the detection data, and generate a corresponding working mode signal;

S103: Acquire the working mode signal, and switch the gas alarm mode according to the working mode signal.

Based on the above-mentioned embodiment, as a preferred embodiment, the step S101 obtains the detection data of the smart gas device, including:

Obtain temperature detection data, vibration detection data and human body detection data of smart gas devices.

Specifically, the temperature detection data is to detect the temperature of the stove eye of the smart gas device, the vibration detection data is the vibration frequency and vibration amplitude of the cooker, and the human body detection data is the induction time of the human body before the stove and the induction time of no one. It should be noted that the human body sensing time is the time period when a person is detected in front of the stove, and the unmanned sensing time is the time period when no one is detected in front of the stove.

Based on the above embodiment, as a preferred embodiment, the step S102 determines the working mode of the smart gas device according to the detection data, including:

Judging whether the temperature detection data and the vibration detection data exceed a preset temperature threshold and a preset vibration threshold, respectively;

If not, generating a first working mode signal;

If so, determine whether there is a person in front of the intelligent gas device according to the human body detection data; if so, generate a second working mode signal; if not, generate a third working mode signal.

Specifically, the working state of the cooker can be analyzed through the detection of the temperature of the cooker's eye, the detection of the vibration of the cooker, and the detection of human activity:

When the temperature detection data is within the preset temperature threshold and the vibration detection data is within the preset vibration threshold, that is, when the temperature of the stove eye is within the temperature range of medium and small heating power, and the vibration pattern of the stove is similar to or the same as the preset cooking vibration pattern, it is determined that the stove is working. In the shutdown or cooking mode, generating a first operating mode signal;

When the temperature detection data exceeds the preset temperature threshold and the vibration detection data exceeds the preset vibration threshold, that is, the temperature of the stove eye is within the temperature range of medium and high firepower, and the vibration pattern of the stove is similar or the same as the preset vibration pattern for cooking, and according to When the human body detection data determines that there is human activity in front of the stove of the intelligent gas device, it is determined that the stove is working in the cooking mode, and a second working mode signal is generated;

When the temperature detection data exceeds the preset temperature threshold and the vibration detection data exceeds the preset vibration threshold, that is, the temperature of the stove eye is within the temperature range of medium and high firepower, and the vibration pattern of the stove is similar or the same as the preset vibration pattern for cooking, and according to When the human body detection data determines that there is no human activity in front of the stove of the intelligent gas device, it is determined that the stove works in an unattended cooking mode, and a third working mode signal is generated.

Based on the above embodiment, as a preferred embodiment, the step S102 determines the working mode of the smart gas device according to the detection data, and further includes:

judging whether the temperature detection data exceeds a preset fire-off temperature;

If yes, then determine whether the unmanned induction time of the human body detection data exceeds a preset time threshold;

If so, it will give an unmanned alarm reminder.

Specifically, the smart gas device has the function of alarming and reminding people for a long time in front of the stove. When the temperature of the stove eye is in the temperature range where the fire is not turned off, and there is no human activity in front of the stove for a preset time, it is necessary to carry out a long time before the stove. No alarm reminder.

Based on the above embodiment, as a preferred embodiment, the step S103 acquires the working mode signal, and switches the gas alarm mode according to the working mode signal, including:

Obtain the detection data of combustible gas;

When acquiring the first working mode signal, determine whether the combustible gas detection data exceeds the preset first concentration threshold, and if so, perform an audible and visual alarm and control the gas cut off;

When acquiring the second working mode signal, determine whether the combustible gas detection data exceeds the first concentration threshold, if so, acquire combustible gas detection data after a preset time, determine whether the combustible gas detection data continues to rise, and if so, proceed to Sound and light alarm and control gas cut off;

When the third working mode signal is acquired, it is determined whether the combustible gas detection data exceeds the preset first concentration threshold, and if so, an audible and visual alarm is performed and the gas is controlled to be cut off.

It should be noted that the semiconductor sensor used in gas detection and alarm is not only sensitive to methane, but also sensitive to interfering gases such as ethanol and acetic acid. If you do not distinguish between the cooking mode and the frying mode, and set the same combustible gas concentration threshold, when the cooker works in the mode, the main gas that appears is water vapor, which will not affect the sensitivity of the semiconductor sensor of the smart gas device, and will cause excessive combustible gas. When the concentration threshold is detected, the alarm will be issued. When the cooker is working in the cooking mode, the probability of interfering gases such as ethanol and acetic acid is greatly increased. The gas detected by the semiconductor sensor of the smart gas device is a mixture of ethanol, acetic acid and combustible gas, which affects The sensitivity of the semiconductor sensor of the smart gas device will also give an alarm when the concentration threshold of the combustible gas is not exceeded, and the false alarm rate is high. If the combustible gas concentration threshold is increased to adapt to the alarm conditions when the cooker is working in the cooking mode, correspondingly, when the cooker is working in the cooking mode, the alarm condition will not be satisfied even if the combustible gas concentration threshold is exceeded, which will reduce the reliability of the alarm. safety. Therefore, the combustible gas concentration thresholds need to be set separately in the two modes of cooking and frying.

Specifically, when the first working mode signal is obtained, that is, when the intelligent gas device is turned off or does not work in the cooking mode, the gas detection and alarm device works in the normal mode: it is judged whether the combustible gas detection data exceeds the first concentration threshold, and if so , the sound and light alarm and control the gas cut off;

When the second working mode signal is acquired, that is, when the working mode of the intelligent gas device is the cooking mode, the gas detection and alarm device works in the mode with interference sources: it is judged whether the combustible gas detection data exceeds the first concentration threshold, and if so, then Acquire combustible gas detection data after a preset time, determine whether the combustible gas detection data continues to rise, if so, perform an audible and visual alarm and control the gas cut-off;

When the third working mode signal is obtained, that is, the working mode of the intelligent gas device is the unattended cooking mode, the gas detection and alarm device works in the mode with interference sources, and it is judged whether the combustible gas detection data exceeds the first concentration threshold, and if so , the sound and light alarm will be carried out directly and the gas will be cut off.

In the cooking mode, regardless of whether someone is watching or not, when the combustible gas detection data exceeds the preset value, an alarm will be issued and the gas will be cut off; while in the cooking mode, when someone is watching, the combustible gas detection data are detected twice exceeding the preset value. When the set value does not drop, the alarm will be issued and the gas will be cut off. In the case of unattended, the safety of cooking and frying will be reduced. As long as the combustible gas detection data exceeds the preset value, the alarm will be issued and the gas will be cut off. Therefore, the gas alarm mode can switch its own working mode according to the working mode of the intelligent gas device, thereby improving the reliability of the alarm device and reducing the false alarm rate.

Based on the above embodiment, as a preferred embodiment, the step S103 acquires the working mode signal, and switches the gas alarm mode according to the working mode signal, further comprising:

It is judged whether the detection data of the combustible gas exceeds the preset second concentration threshold, and if so, an audible and visual alarm is performed and the gas is controlled to be cut off.

Specifically, when the detected combustible gas concentration is within the second concentration threshold (eg, 10000ppm—20% of the lower explosion limit of methane), the gas alarm mode can switch its own working mode according to the working mode of the smart gas device. When the detected gas concentration exceeds the second concentration threshold, no matter what mode the intelligent gas device is in, an audible and visual alarm is issued and the gas is controlled to be cut off.

Please refer to FIG. 2. FIG. 2 is a schematic diagram of connection of a household gas alarm system provided by an embodiment of the present application. The system 200 includes:

The intelligent gas device 201, the gas detection and alarm device 202 and the valve cut-off device 203, the valve cut-off device 203 is installed on the gas pipe in front of the intelligent gas device 201, and the gas detection and alarm device 202 is wirelessly connected with the intelligent gas device 201, The gas detection and alarm device 202 and the valve cut-off device 203 are connected by wire.

Please refer to FIG. 3. FIG. 3 is a block diagram of a smart gas device according to an embodiment of the application. The smart gas device 300 includes a temperature detection module 301, a vibration detection module 302, a human body detection module 303, and a first wireless communication module. 304 and the first MCU control module 305, the first MCU control module 305 is respectively connected with the temperature detection module 301, the vibration detection module 302, the human body detection module 303, and the first wireless communication module 304, the temperature detection module 301 , the vibration detection module 302, and the human body detection module 303 are respectively used for the temperature detection of the stove eye, the vibration detection of the stove, and the detection of human activity of the smart gas device, and the first wireless communication module 304 is used for the smart gas device 300 to perform wireless signal transmission with the outside. .

Specifically, the temperature detection module detects the temperature of the eye of the stove; the vibration detection module detects the vibration of the stove (the vibration frequency and vibration amplitude of the stove); the human detection module detects the activity of the people in front of the stove (the human body induction time before the stove, the unmanned induction time) The first MCU control module processes the detection data, determines the working mode of the cooker according to the detection data, and generates a corresponding working mode signal; the first MCU control module sends the cooker working mode signal to the gas detection and alarm device through the first wireless communication module. The specific control process is as follows:

When the temperature detection data is within the preset temperature threshold and the vibration detection data is within the preset vibration threshold, that is, when the temperature of the stove eye is within the temperature range of medium and small heating power, and the vibration pattern of the stove is similar to or the same as the preset cooking vibration pattern, it is determined that the stove is working. In the shutdown or cooking mode, a first working mode signal is generated, and the first MCU control module sends the cooker first working mode signal to the gas detection and alarm device through the first wireless communication module.

When the temperature detection data exceeds the preset temperature threshold and the vibration detection data exceeds the preset vibration threshold, that is, the temperature of the stove eye is within the temperature range of medium and high firepower, and the vibration pattern of the stove is similar or the same as the preset vibration pattern for cooking, and according to When the human body detection data determines that there is human activity in front of the stove of the intelligent gas device, it is determined that the stove is working in the cooking mode, and a second working mode signal is generated, and the first MCU control module sends the stove second working mode signal to the first wireless communication module. Gas detection and alarm device;

When the temperature detection data exceeds the preset temperature threshold and the vibration detection data exceeds the preset vibration threshold, that is, the temperature of the stove eye is within the temperature range of medium and high firepower, and the vibration pattern of the stove is similar or the same as the preset vibration pattern for cooking, and according to When the human body detection data determines that there is no human activity in front of the stove of the intelligent gas device, it is determined that the stove works in the unmanned cooking mode, and a third working mode signal is generated, and the first MCU control module transmits the third working mode signal of the stove through the first wireless communication module. Send it to the gas detection and alarm device;

When the temperature of the stove eye is in the temperature range that the fire is not turned off, and there is no human activity in front of the stove for a preset time, it is necessary to give an alarm reminder for a long time before the stove, and the first wireless communication module in the intelligent gas device will intelligently The unmanned alarm reminder signal of the gas device is sent to the gas detection and alarm device, and the gas detection and alarm device performs sound and light alarms. The alarm sound frequency and the flashing frequency of the alarm light are different from the alarm sound frequency and the flashing frequency of the alarm light when the gas leakage alarm is set.

Based on the above embodiment, as a preferred embodiment, the smart gas device 300 further includes a valve driving module 306, and the valve driving module 306 is connected to the first MCU control module 305 for when the first MCU control module 305 detects that the When the fire of the intelligent gas device 300 goes out abnormally, the valve driving module 306 is controlled to drive the electromagnetic valve in the stove to turn off the fire.

Specifically, when the first MCU control module detects that the fire is abnormally extinguished, it controls the valve driving module to drive the solenoid valve in the stove to turn off the fire, which can prevent gas leakage when the fire is abnormally extinguished.

Based on the above-mentioned embodiment, as a preferred embodiment, the intelligent gas device 300 further includes a mechanical switch detection module 307, the mechanical switch detection module 307 is connected to the first MCU control module 305, and is used to detect the ignition switch of the intelligent gas device 300. The switch state of the knob.

Specifically, when the mechanical switch detection module detects that the switch state of the ignition switch is an open state, the first MCU control module controls the valve drive module to drive the solenoid valve in the stove to ignite.

Based on the above embodiment, as a preferred embodiment, the smart gas device 300 further includes a touch detection module 308, and the touch detection module 308 is connected to the first MCU control module 305 for detecting the user's touch input to perform Cooker temperature and/or timer switch off time settings.

Based on the above embodiment, as a preferred embodiment, the smart gas device 300 further includes a display module 309, the display module 309 is connected to the first MCU control module 305, and is used to perform the temperature and/or temperature of the stove eye and/or the temperature of the stove eye according to the touch input. Timing off time information display.

Specifically, the smart gas device can realize the function of timing off the fire. Use the touch button to set the timing and start the countdown after confirmation. The display module in the smart gas device displays the countdown time. When the set time is reached, the smart gas device automatically shuts down. fire. If the human body detection module detects that there is a person moving in front of the stove when the set time is about to arrive, the display module will give a time flashing prompt, and the user can cancel the timed shutdown by touching the button.

Based on the above embodiments, as a preferred embodiment, the smart gas device further includes a first power module 310 , and the first power module 310 is used to supply power to the smart gas device 300 .

Specifically, the first power module is respectively connected with a temperature detection module, a vibration detection module, a human body detection module, a first wireless communication module, a first MCU control module, a mechanical switch detection module, a touch detection module, a display module and a valve driver. The module is connected and power is supplied to it.

Please refer to FIG. 4. FIG. 4 is a block diagram of a gas alarm device according to an embodiment of the application. The gas alarm device 400 includes:

A gas detection module 401, a second MCU control module 402, a second wireless communication module 403 and a peripheral drive module 404, the second MCU control module 402, the gas detection module 401, the second wireless communication module 403 and peripherals The drive module 404 is connected, and the peripheral drive module 404 is connected with the valve cut-off device and used to control the valve cut-off device.

Specifically, the gas detection module converts the combustible gas concentration signal detected by the gas sensor into an electrical signal and transmits it to the second MCU control module. The second MCU control module processes and judges the combustible gas concentration signal. At the same time, the second MCU controls The module receives the working mode signal transmitted by the intelligent gas device through the second wireless communication module, and switches its own working mode according to the working mode of the intelligent gas stove. The specific control process is as follows:

When the concentration of combustible gas detected by the gas detection and alarm device exceeds the set value (ie the second concentration threshold, such as 10000ppm - 20% of the lower explosion limit of methane), no matter what mode the smart gas device is in, the gas detection and alarm device will sound The light alarms and outputs a cut-off signal to cut off the valve cut-off device, the second MCU control module sends a signal to the peripheral drive module, the peripheral drive module drives the signal light to flash and the buzzer alarms, and the peripheral drive module simultaneously outputs the valve drive signal to and The output interface connected to the valve cut-off device drives the valve cut-off device to cut off the valve.

When the concentration of combustible gas detected by the gas detection and alarm device is within the set value, the gas detection and alarm device adopts different working modes according to the working mode of the intelligent gas device:

When the intelligent gas device is turned off or does not work in the cooking mode, the gas detection and alarm device works in the normal mode. When the gas detection and alarm device detects that the concentration of combustible gas exceeds the standard, the gas detection and alarm device emits an audible and visual alarm and outputs a cut-off signal to cut off the valve. device to cut off;

When the gas detection and alarm device receives that the working mode of the intelligent gas device is the cooking mode, the gas detection and alarm device works in the mode with interference source, and the gas detection and alarm device adjusts the internal logic algorithm, and temporarily does not process when it detects that the gas concentration exceeds the standard. After a period of delay, the gas detection and alarm device will continue to monitor the gas concentration. If the gas concentration continues to rise, the gas detection and alarm device will issue an audible and visual alarm and output a cut-off signal to cut off the valve cut-off device. If the gas concentration has dropped, the gas The detection and alarm device does not do alarm and cut-off processing;

When the gas detection and alarm device receives that the working mode of the intelligent gas device is the unmanned cooking mode, the gas detection and alarm device works in the mode with interference sources, but the safety performance of the unmanned cooking mode is low, so as long as the gas detection and alarm device detects When the concentration of combustible gas exceeds the standard, the gas detection and alarm device will issue an audible and visual alarm and output a cut-off signal to cut off the valve cut-off device.

Based on the above embodiment, as a preferred embodiment, the gas detection and alarm device 400 further includes a second power module 405 , and the second power module 405 is used to supply power to the gas detection and alarm device 400 .

Specifically, the second power module is connected to the gas detection module, the MCU module, the second wireless communication module, and the peripheral drive module, and provides power for them.

Based on the above embodiment, as a preferred embodiment, the wireless connection between the smart gas device 300 and the gas detection and alarm device 400 adopts ZigBee, Bluetooth or 2.4G communication standard.

Specifically, the communication module in the smart gas device can perform data communication with the communication module in the gas detection and alarm device, and forward the working mode signal and unmanned alarm reminder signal of the smart gas device to the gas detection and alarm device.

Based on the above embodiment, as a preferred embodiment, in the smart gas device 300 of a specific embodiment of the present invention, a temperature detection module, a vibration detection module, a human body detection module, a first wireless communication module, a first MCU control module, The circuit structure diagrams of the mechanical switch detection module, the touch detection module, the display module, the valve driving module, and the first power supply module are shown in Figures 5-14 respectively.

Specifically, as shown in Figures 5-7 and 10, the temperature detection module, vibration detection module, human body detection module, mechanical switch detection module, and valve drive module may include detection interface circuits;

As shown in FIG. 8 , the first wireless communication module may include an NRF24L01 communication chip;

As shown in FIG. 9 , the first MCU control module may include a control chip with a model of PIC16F1519, and its peripheral circuits include a crystal oscillator circuit, a button circuit, a connector, and the like;

As shown in Figure 11, the touch detection module includes 2 touch buttons and a touch sensor chip with a model of VKD232C;

As shown in Figure 12, the display module includes a HT1621B chip to drive the LCD display.

As shown in Figure 13, the valve drive module may include a relay circuit;

As shown in FIG. 14 , the first power supply module may include a power supply chip with a model of LM2596, a three-terminal voltage regulator chip with a model of L7912 and a voltage regulator chip with a model of REG1117, which can convert the AC power into 12V and 3.3V DC power , to supply the electrical components in the intelligent gas device 300 .

Based on the above embodiment, as a preferred embodiment, in the gas detection and alarm device 400 of a specific embodiment of the present invention, the gas detection module, the second MCU control module, the second wireless communication module, the peripheral drive module, the second The circuit diagrams of the power modules are shown in Figures 15-19.

Specifically, as shown in FIG. 15 , the gas detection module includes a detection interface circuit;

As shown in FIG. 16 , the second MCU control module may include a control chip with a model of PIC16F1519, and its peripheral circuits include a crystal oscillator circuit, a button circuit, a connector, and the like;

As shown in FIG. 17 , the second wireless communication module may include an NRF24L01 communication chip;

As shown in Figure 18, the peripheral drive module includes a relay circuit, a signal light and a buzzer, so that an alarm can be issued by the flashing of the signal light and the sound of the buzzer;

As shown in Figure 19, the second power module may include a power chip with a model of LM2596, a three-terminal voltage regulator chip with a model of L7912 and a voltage regulator chip with a model of REG1117, which can convert the AC power into 12V and 3.3V DC power , to supply the electrical components in the intelligent gas device 300 .

It should be noted that the same pin numbers in the above circuit diagrams represent the connection relationship between each other, which will not be described in detail here.

The present application also provides a household gas alarm device, comprising: an intelligent gas stove and a gas detection alarm, wherein the intelligent gas stove and the gas detection alarm are wirelessly connected.

Please refer to FIG. 20. FIG. 20 is a schematic diagram of an external structure of a smart gas stove provided by an embodiment of the application. The smart gas stove includes: a temperature detection sensor, a vibration detection sensor, a human body detection sensor, a display unit, a touch button, a switch Fire knob, the temperature detection sensor is arranged on the stove eye, the vibration detection sensor is arranged next to the stove eye, the human body detection sensor is arranged on the side of the smart gas stove facing the user, the display unit, touch buttons And the switch fire knob is set on the level of the smart gas stove.

Please refer to FIG. 21 , which is a schematic diagram of the external structure of a gas detection alarm provided by an embodiment of the application. The gas detection alarm includes: a gas detection port, an alarm sounding port, an alarm indicator light, and a reset mute button.

In this application, the working state of the intelligent gas device is added to the gas alarm judgment, thereby increasing the accuracy of the gas alarm. At the same time, the intelligent gas device can use the sound and light alarm function of the gas detection and alarm device to realize long-term unmanned operation in front of the stove. The alarm reminder further improves the user's gas and fire safety.

The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same and similar parts between the various embodiments can be referred to each other. For the system provided by the embodiment, since it corresponds to the method provided by the embodiment, the description is relatively simple, and the relevant part can be referred to the description of the method.

Specific examples are used herein to illustrate the principles and implementations of the present application, and the descriptions of the above embodiments are only used to help understand the methods and core ideas of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principles of the present application, several improvements and modifications can also be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

It should also be noted that, in this specification, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply these entities or operations. There is no such actual relationship or sequence between operations. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

Claims (12)

1. a household gas alarm method, is characterized in that, comprises: Obtain the detection data of smart gas devices; Determine the working mode of the intelligent gas device according to the detection data, and generate a corresponding working mode signal; The working mode signal is acquired, and the gas alarm mode is switched according to the working mode signal. 2. The household gas alarm method according to claim 1, wherein the acquiring the detection data of the smart gas device comprises: Obtain temperature detection data, vibration detection data and human body detection data of smart gas devices. 3 . The household gas alarm method according to claim 2 , wherein determining the working mode of the intelligent gas device according to the detection data, and generating a corresponding working mode signal, comprising: 3 . Judging whether the temperature detection data and the vibration detection data exceed a preset temperature threshold and a preset vibration threshold, respectively; If not, generating a first working mode signal; If so, determine whether there is a person in front of the intelligent gas device according to the human body detection data; if so, generate a second working mode signal; if not, generate a third working mode signal. 4 . The household gas alarm method according to claim 3 , wherein determining the working mode of the intelligent gas device according to the detection data and generating a corresponding working mode signal, further comprising: 5 . judging whether the temperature detection data exceeds a preset fire-off temperature; If yes, then determine whether the unmanned induction time of the human body detection data exceeds a preset time threshold; If so, it will give an unmanned alarm reminder. 5. The household gas alarm method according to claim 1, wherein the acquiring the working mode signal and switching the gas alarm mode according to the working mode signal comprises: Obtain the detection data of combustible gas; When acquiring the first working mode signal, determine whether the combustible gas detection data exceeds the preset first concentration threshold, if so, perform an audible and visual alarm and control the gas cut off; When acquiring the second working mode signal, determine whether the combustible gas detection data exceeds the preset first concentration threshold, if so, acquire combustible gas detection data after a preset time, and determine whether the combustible gas detection data continues to rise, if so , the sound and light alarm and control the gas cut off; When the third working mode signal is acquired, it is determined whether the combustible gas detection data exceeds the preset first concentration threshold, and if so, an audible and visual alarm is performed and the gas is controlled to be cut off. 6 . The household gas alarm method according to claim 5 , wherein the acquiring the working mode signal and switching the gas alarm mode according to the working mode signal further comprises: 6 . It is judged whether the detection data of the combustible gas exceeds the preset second concentration threshold, and if so, an audible and visual alarm is performed and the gas is controlled to be cut off. 7. A household gas alarm system, characterized in that, comprising: Intelligent gas device, gas detection and alarm device and valve cut-off device, the valve cut-off device is installed on the gas pipe in front of the intelligent gas device, the gas detection and alarm device is wirelessly connected with the intelligent gas device, and the gas detection and alarm device is cut off from the valve devices are connected by wire, where, The intelligent gas device includes a detection module, a first wireless communication module and a first MCU control module, the first MCU control module is connected to the detection module and the first wireless communication module, and the detection module includes a temperature detection module, The vibration detection module and the human body detection module are respectively used for the temperature detection of the stove eye of the intelligent gas device, the vibration detection of the stove, and the detection of human activity, and the first wireless communication module is used for the wireless signal transmission between the gas detection and alarm device and the intelligent gas device; The gas detection and alarm device includes a gas detection module, a second MCU control module, a second wireless communication module and a peripheral drive module, the second MCU control module and the gas detection module, the second wireless communication module and peripherals The drive module is connected, and the peripheral drive module is connected with the valve cut-off device and used to control the valve cut-off device. 8 . The household gas alarm system according to claim 7 , wherein the intelligent gas device further comprises a valve driving module, the valve driving module is connected with the first MCU control module, and is used for when the first MCU control module detects that the first MCU control module detects the When the fire of the intelligent gas device goes out abnormally, the control valve drive module drives the solenoid valve in the stove to turn off the fire. 9 . The household gas alarm system according to claim 7 , wherein the detection module further comprises a mechanical switch detection module, and the mechanical switch detection module is connected to the first MCU control module for detecting the switch of the intelligent gas device. 10 . The switch state of the fire knob. 10 . The household gas alarm system according to claim 7 , wherein the detection module further comprises a touch detection module, and the touch detection module is connected to the first MCU control module and is used to detect the user's touch. 11 . Enter to set the burner temperature and/or the timer switch off time. 11 . The household gas alarm system according to claim 7 , wherein the smart gas device further comprises a display module, the display module is connected to the first MCU control module, and is used to measure the temperature of the stove eye according to the touch input. 12 . and/or timing off time information display. 12. A household gas alarm device, characterized in that, comprising: An intelligent gas stove and a gas detection alarm, the intelligent gas stove and the gas detection alarm are wirelessly connected, wherein, The intelligent gas stove includes: a temperature detection sensor, a vibration detection sensor, a human body detection sensor, a display unit, a touch button, and a switch knob, the temperature detection sensor is arranged on the stove eye, and the vibration detection sensor is arranged on the stove eye Beside, the human body detection sensor is arranged on the side of the smart gas stove facing the user, and the display unit, the touch buttons and the switch knob are arranged on the level of the smart gas stove. The gas detection alarm includes: a gas detection port, an alarm sounding port, an alarm indicator light and a reset mute button.

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