CN209961749U - Indoor harmful gas monitoring system based on ZigBee - Google Patents

Abstract

The utility model relates to an indoor harmful gas monitoring system based on zigBee, include: the system comprises a plurality of terminal nodes, a coordinator, a communication module and a user intelligent terminal; the terminal node collects harmful gas concentration information at the position through a harmful gas sensor and transmits the information to the coordinator; and the coordinator judges the grade of the harmful gas according to the concentration value of the harmful gas and determines the source place of the harmful gas. According to the system, harmful gas collection is carried out through a plurality of terminal nodes built by the ZigBee wireless sensor network, so that the concentration of indoor harmful gas can be more accurately obtained; the system can also judge the specific source position of the harmful gas, and is beneficial to more accurately treating the harmful gas by a user; when harmful gas leaks indoors, the system can send detailed information of the indoor harmful gas to the mobile phone of the user, so that remote monitoring and alarming of the indoor harmful gas are realized, and the life and property safety of the user is protected.

Description

Indoor harmful gas monitoring system based on ZigBee

technical field

The utility model relates to the technical field of harmful gas monitoring, in particular to an indoor harmful gas monitoring system based on ZigBee.

Background technique

With the rapid development of economy and technology, people have higher and higher requirements for the level of comfort and health of the living environment. However, there are various environmental problems in real life: the outdoor air is filled with various impurities and haze. And harmful gases, toxic and harmful gases such as formaldehyde produced by indoor house decoration, and polluting gases produced in factories are eroding people's health all the time. To have a safe and comfortable home environment and workplace at all times, simple monitoring instruments and human supervision are far from enough. At present, how to accurately perceive the concentration of harmful gases in the surrounding environment with low cost and simple structure, and quickly and accurately locate the source of gas leakage is a difficulty that needs to be overcome.

At present, the industry and enterprises involved in the detection of harmful gases at home and abroad, the research on the detection of harmful gases is still in the primary stage, and most of the detection equipment can only realize the functions of gas concentration detection and over-limit alarm. Hazardous gas detectors can generally be divided into portable detectors and fixed detectors. Portable detectors are mainly used for single sample detection and environmental emergency detection. Fixed detectors are mostly used in industrial sites that are prone to harmful gases, and conduct real-time monitoring of production sites. Existing indoor gas detection systems still have many shortcomings: for example, fixed detectors rely too much on wire and cable-based communication facilities, are bulky, costly, and cannot be monitored remotely; while portable detectors can only be used by testers Carrying the detector in person into the test site for testing, firstly, the tester may encounter dangerous accidents and endanger his life; secondly, this portable detector is not suitable for indoor large-area testing and cannot be remotely monitored in real time. In addition, when the existing detection equipment detects that the harmful gas in the environment exceeds the standard, it cannot accurately locate the leakage source of the harmful gas, which is beneficial to the rapid and efficient treatment of the harmful gas.

Utility model content

In view of this, the purpose of the present utility model is to overcome the deficiencies of the prior art and provide a ZigBee-based indoor harmful gas monitoring system.

To achieve the above purpose, the present utility model adopts the following technical solutions: a ZigBee-based indoor harmful gas monitoring system, comprising:

Multiple terminal nodes, coordinators, communication modules and user intelligent terminals;

Wherein, the multiple terminal nodes are scattered at different indoor locations, and each terminal node includes: a harmful gas sensor, a controller, an A/D conversion module and a first ZigBee module;

The harmful gas sensor is used to collect harmful gas concentration information at the location, and after the information is processed by the A/D conversion module, it is transmitted to the controller, and the controller passes the first ZigBee the module transmits the gas concentration information to the coordinator;

The coordinator includes: a main controller and a second ZigBee module;

The main controller receives the harmful gas concentration information transmitted by the terminal node through the second ZigBee module, wherein the harmful gas concentration information includes: the type of harmful gas and the corresponding concentration value; The concentration value of the harmful gas determines the level of the harmful gas, and the source location of the harmful gas is determined by the concentration value of the harmful gas and the address of the terminal node.

Optionally, the coordinator is connected to the communication module through a serial port, and the coordinator can send the harmful gas concentration information and the source of the harmful gas to the communication module through the serial port, and then the communication module transmits it wirelessly. to the user intelligent terminal.

Optionally, the type of the harmful gas sensor is an MQ-2 harmful gas sensor, which is used to detect the concentration values of liquefied gas, carbon monoxide, methane and phenolic gases in the indoor environment.

Optionally, the coordinator further includes:

alarm module;

The alarm module is electrically connected with the main controller, and is used for sending out an alarm signal under the control of the main controller when the indoor harmful gas level exceeds the standard.

Optionally, the alarm module includes:

Buzzer for alarm information in the form of sound, and/or LED indicator for alarm information in the form of flashing lights.

Optionally, the coordinator further includes:

display module;

The display module is electrically connected with the main controller, and is used to display the concentration value, level and source location of the harmful gas exceeding the standard in real time when the level of the harmful gas in the room exceeds the standard.

Optionally, each terminal node is further provided with a power supply module for supplying power to the harmful gas sensor, the controller, the A/D conversion module and the first ZigBee module.

Optionally, the controller and the main controller are both 8051 microcontrollers.

Optionally, the communication module is: a GSM module;

The GSM module transmits the data of the coordinator to the user intelligent terminal in the form of short message transparent transmission.

Optionally, the user smart terminal includes: a smart phone and a smart tablet computer.

The utility model adopts the above technical solutions. The ZigBee-based indoor harmful gas monitoring system includes: a plurality of terminal nodes, a coordinator, a communication module and a user intelligent terminal; wherein, the plurality of terminal nodes are scattered in different indoor locations. Each of the terminal nodes includes: a harmful gas sensor, a controller, an A/D conversion module and a first ZigBee module; the harmful gas sensor is used to collect harmful gas concentration information at the location, and use the information After being processed by the A/D conversion module, it is transmitted to the controller, and the controller transmits the gas concentration information to the coordinator through the first ZigBee module; the coordinator includes: a main controller and the second ZigBee module; the main controller receives the harmful gas concentration information transmitted by the terminal node through the second ZigBee module, wherein the harmful gas concentration information includes: the type of harmful gas and the corresponding concentration value ; The main controller judges the level of the harmful gas according to the concentration value of the harmful gas, and judges the source location of the harmful gas according to the concentration value of the harmful gas and the address of the terminal node. The system uses multiple terminal nodes built by the ZigBee wireless sensor network to collect harmful gases, and can more accurately obtain the concentration of indoor harmful gases; the system can also determine the specific source location of harmful gases, which is beneficial to users more accurately When the indoor harmful gas leaks, the system can send the detailed information of the indoor harmful gas to the user's mobile phone, realizing the remote monitoring and alarming of the indoor harmful gas, which is beneficial to protect the safety of users' lives and property.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

1 is a schematic diagram of the overall structure provided by the ZigBee-based indoor harmful gas monitoring system of the present invention;

Fig. 2 is the structural representation of the terminal node of the indoor harmful gas monitoring system based on ZigBee of the present utility model;

Fig. 3 is the structural representation of the coordinator of the ZigBee-based indoor harmful gas monitoring system of the present invention;

FIG. 4 is a schematic diagram of a data collection process flow of a terminal node based on ZigBee communication in the prior art.

In the figure: 1. Terminal node; 2. Coordinator; 3. GSM module; 4. User intelligent terminal; 5. Harmful gas sensor; 6. Controller; 7. A/D conversion module; 8. The first ZigBee module; 9. Main controller; 10. Second ZigBee module; 11. Alarm module; 12. Display module; 13. Power supply module; 14. Serial port.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present invention.

As shown in Figure 1 to Figure 3, the present utility model provides a ZigBee-based indoor harmful gas monitoring system, including:

a plurality of terminal nodes 1, a coordinator 2, a communication module and a user intelligent terminal 4;

Wherein, the plurality of terminal nodes 1 are scattered at different indoor locations, and each of the terminal nodes 1 includes: a harmful gas sensor 5, a controller 6, an A/D conversion module 7 and a first ZigBee module 8;

The harmful gas sensor 5 is used to collect harmful gas concentration information at the location, and after the information is processed by the A/D conversion module 7, it is transmitted to the controller 6, and the controller 6 passes the The first ZigBee module 8 transmits the gas concentration information to the coordinator 2;

The coordinator 2 includes: a main controller 9 and a second ZigBee module 10;

The main controller 9 receives the harmful gas concentration information transmitted by the terminal node 1 through the second ZigBee module 10, wherein the harmful gas concentration information includes: the type of harmful gas and the corresponding concentration value; The controller 9 judges the level of the harmful gas according to the concentration value of the harmful gas, and judges the source location of the harmful gas according to the concentration value of the harmful gas and the address of the terminal node 1 .

Further, the coordinator 2 is connected with the communication module through the serial port 14, and the coordinator 2 can send the harmful gas concentration information and the source of the harmful gas to the communication module through the serial port 14, and then the communication The module is wirelessly transmitted to the user intelligent terminal 4 .

Specifically, the type of the harmful gas sensor 5 is an MQ-2 harmful gas sensor, which is used to detect the concentration values of liquefied gas, carbon monoxide, methane and phenolic gases in the indoor environment.

It should be noted that the coordinator 2 further includes:

Alarm module 11;

The alarm module 11 is electrically connected to the main controller 9 for sending out an alarm signal under the control of the main controller 9 when the level of harmful gas in the room exceeds the standard.

Specifically, the alarm module 11 includes:

Buzzer for alarm information in the form of sound, and/or LED indicator for alarm information in the form of flashing lights.

Further, the coordinator 2 also includes:

display module 12;

The display module 12 is electrically connected to the main controller 9, and is used to display the concentration value, level and source location of the harmful gas exceeding the standard in real time when the level of the harmful gas in the room exceeds the standard. The display module 12 is an LCD display module 12 .

It should be supplemented that each terminal node 1 is also provided with a power supply module 13 for supplying power to the harmful gas sensor 5 , the controller 6 , the A/D conversion module 7 and the first ZigBee module 8 . Each terminal node 1 is powered by an independent power supply module 13, which is beneficial to ensure that each terminal node 1 can be flexibly arranged at any position in the room according to actual needs.

Specifically, the controller 6 and the main controller 9 are both 8051 single-chip microcomputers.

It should be further explained that the communication module is: GSM module 3;

The GSM module 3 sends the data of the coordinator to the user intelligent terminal 4 by means of short message transparent transmission.

It can be understood that the user smart terminal 4 includes: a smart phone and a smart tablet computer.

In actual use, the terminal nodes 1 scattered in different indoor locations of the present invention use the MQ-2 harmful gas sensor 5 to collect harmful gas information in the environment, and process the information through the A/D conversion module 7 After that, it is transmitted to the controller 6, and the controller 6 transmits the gas concentration information to the coordinator 2 through the built tree ZigBee wireless sensor network; each piece of information received by the coordinator 2 Both contain: the identity information of the coordinator 2 and the harmful gas information (including the type of harmful gas and the corresponding concentration value) uploaded by the coordinator 2; the main controller 9 on the coordinator 2 according to the concentration value of the harmful gas Judging the level of harmful gas, when the level of harmful gas in the room exceeds the standard, the main controller 9 can obtain the identity information of the terminal node 1 that reports the excess gas, and can obtain the position where the terminal node 1 is placed through the identity information ( The location where each numbered terminal node 1 is placed in the room is preset), so as to determine the source location of the harmful gas, so as to quickly control the harmful gas. And when the indoor harmful gas level exceeds the standard, the main controller 9 will also control the alarm module 11 to issue an alarm signal, so that the user can know in time and take treatment measures in time.

In order to improve the user's monitoring of indoor harmful gases, the coordinator 2 will also send detailed information of indoor harmful gases (including harmful gas types and corresponding concentration values) to the user's smart terminal 4 through the GSM module 3, and when there is a certain When the harmful gas exceeds the standard, alarm information is sent to the user's intelligent terminal 4 to ensure that the user can remotely receive the alarm information and take protective measures.

In this system, the terminal node 1 and the coordinator 2 both use the CC2530 development board to complete the function development. Although the terminal node 1 does not need to store the collected harmful gas concentration information, it needs to run the Z-Stack protocol stack on the terminal node 1. Therefore, the terminal node 1 may also include 256KB flash memory. In this system, the concentration detection of liquefied gas, carbon monoxide, methane, phenols and other combustible gases in the indoor environment is completed through the MQ-2 harmful gas sensor 5.

In this embodiment, the terminal node 1 mainly completes the collection and transmission of harmful gas concentration information in the environment. Its software design includes serial port 14 communication module and radio frequency communication module (initialization of Z-Stack protocol stack, radio frequency transmission and reception). Its software flow chart is shown in Figure 4. The software process adopts the existing Zigbee protocol, which belongs to the existing technology.

The indoor harmful gas monitoring system of the utility model has the advantages of low power consumption, small time delay, small size, portability, low cost and the like by using the ZigBee wireless transmission technology. The terminal node 1 collects indoor harmful gases, and can more accurately obtain the concentration of harmful gases indoors (whether it is a large-area room or a small-area room). Accurately control harmful gases; this system is a low-power system, using battery power supply and wireless transmission, which reduces the complexity of wiring, the cost of use and the complexity of installation; in addition, this system communicates with GSM through coordinator 2 Module 3 communication, when the indoor harmful gas leakage occurs, the detailed information of indoor harmful gas can be sent to the user's mobile phone in the form of text message, so that the user can know the specific situation of the home at the first time, and realize the remote monitoring and control of indoor harmful gas. Alarm is helpful to protect the safety of users' lives and property.

It can be understood that, the same or similar parts in the above embodiments may refer to each other, and the content not described in detail in some embodiments may refer to the same or similar content in other embodiments.

It should be noted that, in the description of the present invention, the terms "first", "second" and the like are only used for the purpose of description, and cannot be understood as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise specified, the meaning of "plurality" means at least two.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structure, material or feature is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limitations of the present invention, and those of ordinary skill in the art are within the scope of the present invention Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (10)

1. an indoor harmful gas monitoring system based on ZigBee, is characterized in that, comprises: Multiple terminal nodes, coordinators, communication modules and user intelligent terminals; Wherein, the multiple terminal nodes are scattered at different indoor locations, and each terminal node includes: a harmful gas sensor, a controller, an A/D conversion module and a first ZigBee module; The harmful gas sensor is used to collect harmful gas concentration information at the location, and after the information is processed by the A/D conversion module, it is transmitted to the controller, and the controller passes the first ZigBee the module transmits the gas concentration information to the coordinator; The coordinator includes: a main controller and a second ZigBee module; The main controller receives the harmful gas concentration information transmitted by the terminal node through the second ZigBee module, wherein the harmful gas concentration information includes: the type of harmful gas and the corresponding concentration value; The concentration value of the harmful gas determines the level of the harmful gas, and the source location of the harmful gas is determined by the concentration value of the harmful gas and the address of the terminal node. 2. The indoor harmful gas monitoring system according to claim 1, wherein the coordinator and the communication module are connected through a serial port, and the coordinator can transmit the harmful gas concentration information and the source of the harmful gas through the serial port It is sent to the communication module, and then wirelessly transmitted to the user intelligent terminal by the communication module. 3. indoor harmful gas monitoring system according to claim 1, is characterized in that, the model of described harmful gas sensor is MQ-2 harmful gas sensor, is used for detecting liquefied gas, carbon monoxide, methane and phenolic gas in indoor environment concentration value. 4. The indoor harmful gas monitoring system according to claim 1, wherein the coordinator further comprises: alarm module; The alarm module is electrically connected with the main controller, and is used for sending out an alarm signal under the control of the main controller when the indoor harmful gas level exceeds the standard. 5. The indoor harmful gas monitoring system according to claim 4, wherein the alarm module comprises: Buzzer for alarm information in the form of sound, and/or LED indicator for alarm information in the form of flashing lights. 6. The indoor harmful gas monitoring system according to claim 4, wherein the coordinator further comprises: display module; The display module is electrically connected with the main controller, and is used to display the concentration value, level and source location of the harmful gas exceeding the standard in real time when the level of the harmful gas in the room exceeds the standard. 7. The indoor harmful gas monitoring system according to claim 1, wherein each terminal node is further provided with a power supply module for providing the harmful gas sensor, controller, A/D conversion module and The first ZigBee module is powered. 8 . The indoor harmful gas monitoring system according to claim 1 , wherein the controller and the main controller are both 8051 single-chip microcomputers. 9 . 9. The indoor harmful gas monitoring system according to any one of claims 1 to 7, wherein the communication module is: a GSM module; The GSM module transmits the data of the coordinator to the user intelligent terminal in the form of short message transparent transmission. 10. The indoor harmful gas monitoring system according to any one of claims 1 to 7, wherein the user intelligent terminal comprises: a smart phone and a smart tablet computer.

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