CN112697972A - Indoor air monitor and using method - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 10
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 207
- 238000001514 detection method Methods 0.000 claims abstract description 49
- 238000004891 communication Methods 0.000 claims abstract description 43
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- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 1
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Abstract
The invention relates to an indoor air monitor and a using method, wherein the indoor air monitor comprises a formaldehyde detection module, a PM2.5 detection module, a temperature and humidity detection module, a controller, a communication module, a data monitoring platform, a display module, an alarm module, a key module and a storage module; the formaldehyde detection module, the PM2.5 detection module and the temperature and humidity detection module are respectively connected with the controller; the controller is respectively connected with the communication module, the display module, the alarm module, the key module and the storage module; the communication module is connected with the data monitoring platform. Compared with the prior art, the invention can set a formaldehyde concentration alarm threshold, a PM2.5 concentration alarm threshold and a temperature and humidity alarm threshold through the key module, is suitable for different occasions and meets the alarm requirements of different occasions; besides a conventional audible and visual alarm, the SIM800C GSM wireless communication module is also arranged, so that the alarm information can be sent to a user in a short message mode, the practicability is high, and the user can know the alarm information in time.
Description
Technical Field
The invention relates to the field of air quality monitoring, in particular to an indoor air monitor and a using method thereof.
Background
In recent years, with the improvement of living standard of people, the air quality problem is more and more concerned by people from health consideration, and not only the outdoor air pollution condition is emphasized, but also the indoor air quality is emphasized more and more. Modern people live and work in indoor environment, and under the conditions of house decoration, long-time indoor operation and the like, the concentration of harmful gases such as formaldehyde and the like and other harmful substances such as extremely fine pollution particulate matters PM2.5 and the like in indoor air influences the physical and mental health of people, and an indoor air quality monitoring device is urgently needed to monitor the air quality.
The air quality monitoring mainly comprises the steps of carrying out 24-hour continuous online monitoring on conventional pollution factors and meteorological parameters in the air, providing analyzed data for a client as a reference for the quality of the air, and assisting environmental protection decision, wherein the factors to be monitored comprise: pollution of ultrafine particulate matter PM2.5, carbon dioxide, formaldehyde, other harmful substances and the like.
Chinese patent CN202010550036.2 discloses an indoor air quality intelligent monitoring system based on internet of things, which transmits formaldehyde concentration, carbon dioxide concentration and the like to the cloud through a sensor and a wireless communication module, checks and analyzes data at the cloud, and gives an alarm according to a preset threshold range. However, the interactivity of the air quality monitoring system is poor, a user needs to log in a cloud to check the air quality index, once harmful gas exceeds the standard, the user is likely to be unable to receive alarm information in time, and the instantaneity and the reliability are poor; in addition, in different environments, concentration thresholds of various harmful gases are different, alarming according to the same threshold range is obviously unreasonable, once data are in a problem in the transmission process or are lost and tampered when being stored in a cloud, the safety and consistency of the data cannot be guaranteed, traceability is difficult, and indoor air quality cannot be truly and reliably reflected in air quality monitoring.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an indoor air monitor and a using method thereof, wherein a formaldehyde concentration alarm threshold, a PM2.5 concentration alarm threshold and a temperature and humidity alarm threshold can be set through a key module, so that the indoor air monitor is suitable for different occasions and meets the alarm requirements of different occasions; besides a conventional audible and visual alarm, the SIM800C GSM wireless communication module is also arranged, so that the alarm information can be sent to a user in a short message mode, the practicability is high, and the user can know the alarm information in time.
The purpose of the invention can be realized by the following technical scheme:
an indoor air monitor comprises a formaldehyde detection module, a PM2.5 detection module, a controller, a communication module, a data monitoring platform, a temperature and humidity detection module, a display module, an alarm module, a key module and a storage module;
the formaldehyde detection module, the PM2.5 detection module and the temperature and humidity detection module are respectively connected with the controller;
the controller is respectively connected with the communication module, the display module, the alarm module, the key module and the storage module;
the communication module is connected with the data monitoring platform;
the key module is used for setting working parameters of the indoor air monitor.
Further, the controller includes an STC89C52 microcontroller and a power supply.
Further, the formaldehyde detection module comprises a DART formaldehyde sensor having pin 3 connected to the positive power supply, pin 4 connected to ground, pin 1 connected to PA3 of the STC89C52 microcontroller, and pin 2 connected to PA1 of the STC89C52 microcontroller.
Furthermore, the PM2.5 detection module comprises a GSPMS5003 sensor, wherein an RX pin of the GSPMS5003 sensor is connected with a transmitting data line USARTI-TXD of an STC89C52 microcontroller, a TX pin is connected with a receiving data line USARTI-RXD of an STC89C52 microcontroller, and a SET pin is connected with a PB12 of the STC89C52 microcontroller.
Furthermore, the temperature and humidity detection module comprises a DHT12 temperature and humidity sensor, wherein a DATA line DATA of the DHT12 temperature and humidity sensor is connected with a PB11 of the STC89C52 microcontroller, and a clock line SCK is connected with a PB10 of the STC89C52 microcontroller.
Further, the communication module is a WIFI module, and the data monitoring platform is deployed on a cloud server.
Further, the display module comprises an LCD12864 liquid crystal display, wherein a TX pin of the LCD12864 liquid crystal display is connected with a receiving data line USART4RXD of the STC89C522 microprocessor, and an RX pin is connected with a transmitting data line USART4TXD of the STC89C522 microprocessor.
Furthermore, the alarm module comprises a SIM800C GSM wireless communication module for sending alarm information to a user, wherein a pin 1 of the SIM800C GSM wireless communication module is connected with the ground, a pin 2 is connected with the positive electrode of a power supply, a pin 3 is connected with a U1EX of an STC89C52 microcontroller, and a pin 4 is connected with a U1-TX of the STC89C52 microcontroller.
Furthermore, the alarm module also comprises an audible and visual alarm.
The use method of the indoor air monitor is based on the indoor air monitor, and comprises the following steps:
s1: the display content of the display module, the formaldehyde concentration alarm threshold, the PM2.5 concentration alarm threshold and the temperature and humidity alarm threshold are set through the key module;
s2: the formaldehyde detection module, the PM2.5 detection module and the temperature and humidity detection module receive a start signal sent by the controller, and respectively acquire formaldehyde concentration data, PM2.5 concentration data and temperature and humidity data according to a preset time period;
s3: the controller receives the formaldehyde concentration data, the PM2.5 concentration data and the temperature and humidity data, transmits the data to the communication module, the display module and the storage module, and gives an alarm through the alarm module if the formaldehyde concentration exceeds a formaldehyde concentration alarm threshold; if the concentration of PM2.5 exceeds the alarm threshold value of the concentration of PM2.5, an alarm module alarms; if the temperature and humidity exceed the temperature and humidity alarm threshold, the alarm module alarms; otherwise, the alarm module does not alarm;
s4: the communication module receives and transmits formaldehyde concentration data, PM2.5 concentration data and temperature and humidity data to the data monitoring platform, the display module receives and displays the formaldehyde concentration data, the PM2.5 concentration data and the temperature and humidity data, and the storage module receives and stores the formaldehyde concentration data, the PM2.5 concentration data and the temperature and humidity data.
Compared with the prior art, the invention has the following beneficial effects:
(1) can set for formaldehyde concentration alarm threshold, PM2.5 concentration alarm threshold and humiture alarm threshold through button module, be applicable to different occasions, satisfy the alarm demand of different occasions.
(2) Besides a conventional audible and visual alarm, the SIM800C GSM wireless communication module is also arranged, so that the alarm information can be sent to a user in a short message mode, the practicability is high, and the user can know the alarm information in time.
(3) Besides uploading the monitoring data to a data monitoring platform for storage, a storage module is also arranged for local storage of the data, so that the problems of data loss, data tampering and the like are avoided.
(4) Besides the indoor air quality is remotely monitored through the data monitoring platform, real-time air quality information can be sent to a user in a short message mode through the SIM800C GSM wireless communication module, and the reliability is higher.
(5) The DART formaldehyde sensor, the GSPMS5003 sensor and the DHT12 temperature and humidity sensor are used for air quality monitoring, the precision is higher, an LCD12864 liquid crystal display is used for displaying an air quality monitoring result in real time, the display content is rich, and the working temperature range is also higher.
Drawings
FIG. 1 is a schematic view of an embodiment of an indoor air monitor;
FIG. 2 is a circuit configuration diagram of an indoor air monitor according to an embodiment;
reference numerals: 11. formaldehyde detection module, 12, PM2.5 detection module, 13, temperature and humidity detection module, 2, controller, 3, communication module, 4, data monitoring platform, 5, display module, 6, alarm module, 7, button module, 8, storage module.
Detailed Description
The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Example 1:
the utility model provides an indoor air monitor, as shown in figure 1, includes formaldehyde detection module 11, PM2.5 detection module 12, temperature and humidity detection module 13, controller 2, communication module 3, data monitoring platform 4, display module 5, alarm module 6, button module 7 and storage module 8.
The formaldehyde detection module 11, the PM2.5 detection module 12 and the temperature and humidity detection module 13 are respectively connected with the controller 2; the controller 2 is respectively connected with the communication module 3, the display module 5, the alarm module 6, the key module 7 and the storage module 8; the communication module 3 is connected with the data monitoring platform 4.
In this embodiment, a circuit configuration diagram of the indoor air monitor is shown in fig. 2.
The controller 2 includes an STC89C52 microcontroller and a power supply. STC89C52 series single-chip microcomputer is selected, the single-chip microcomputer is high in cost performance, powerful in function, low in power consumption and cost, suitable for a low-power-consumption handheld measurement and control system, and capable of meeting the requirements of portability and low power consumption of an indoor air quality detector.
The formaldehyde detection module 11 comprises a DART formaldehyde sensor, wherein a pin 3 of the DART formaldehyde sensor is connected with the anode of a power supply, a pin 4 of the DART formaldehyde sensor is connected with the ground, a pin 1 of the DART formaldehyde sensor is connected with a PA3 of an STC89C52 microcontroller, and a pin 2 of the DART formaldehyde sensor is connected with a PA1 of an STC89C52 microcontroller. The DART formaldehyde sensor is used for detecting the concentration content of formaldehyde in indoor air, and has the characteristics of high resolution, low power consumption and high stability. In the embodiment, the DART formaldehyde sensor converts the concentration of formaldehyde gas into a current signal, but because the acquired signal is very weak and does not meet the requirement of data input of a single chip microcomputer, a high-power operational amplification circuit is selected to amplify the current signal. In the embodiment, the formaldehyde detection range is 0.00-6.00mg/m3The formaldehyde detection precision can reach 0.01mg/m3。
The PM2.5 detection module 12 comprises a GSPMS5003 sensor, wherein an RX pin of the GSPMS5003 sensor is connected with a transmitting data line USARTI-TXD of an STC89C52 microcontroller, a TX pin is connected with a receiving data line USARTI-RXD of an STC89C52 microcontroller, and a SET pin is connected with PB12 of the STC89C52 microcontroller. Mainly aiming at objects to be detected such as especially fine particles such as cigarette particles and fine particles by using a GSPMS5003 laser sensorThe sensitivity is high, and the response time can reach 10 ms. In this embodiment, the PM2.5 detection range is 0-3000ug/m3The PM2.5 detection precision can reach 1ug/m3。
The temperature and humidity detection module 13 comprises a DHT12 temperature and humidity sensor, a DATA line DATA of the DHT12 temperature and humidity sensor is connected with a PB11 of an STC89C52 microcontroller, and a clock line SCK is connected with a PB10 of the STC89C52 microcontroller. The change of the internal thermistor and the humidity-sensitive capacitor of the DHT12 temperature and humidity sensor is caused by the change of external temperature and humidity, and a voltage signal is formed by a conversion circuit and an amplifying circuit and then is converted into a required digital signal by an internal integrated A/D converter. The DHT12 temperature and humidity sensor can transmit signals over 20 meters, and can meet the measurement requirements of most occasions. In this embodiment, the temperature range is 0-50 ℃ and the humidity range is 1-99% RH.
Compare with other products on the market, each item parameter measurement scope of the air quality monitor that this application provided is more excellent, and measurement accuracy is roughly the same.
The communication module 3 is a WIFI module, and the data monitoring platform 4 is deployed on a cloud server. In other embodiments, the data monitoring platform 4 may also be deployed in a local computer, and the communication module 3 may be a wireless communication module such as a bluetooth module, or may be directly a data line.
The display module 5 comprises an LCD12864 liquid crystal display, wherein a TX pin of the LCD12864 liquid crystal display is connected with a receiving data line USART4RXD of the STC89C522 microprocessor, and an RX pin is connected with a transmitting data line USART4TXD of the STC89C522 microprocessor. The LCD12864 liquid crystal display screen is used, the resolution is 128 × 64, 8192 Chinese characters and 128 characters are arranged in the LCD, the display device can display the contents of characters, numbers, Chinese characters, graphs and the like, the display contents are rich, and the working temperature range is also higher.
The alarm module 6 comprises a SIM800C GSM wireless communication module for sending alarm information to a user, wherein a pin 1 of the SIM800C GSM wireless communication module is grounded, a pin 2 is connected with a power supply anode, a pin 3 is connected with a U1EX of an STC89C52 microcontroller, and a pin 4 is connected with a U1-TX of the STC89C52 microcontroller. The alarm module 6 also comprises an audible and visual alarm.
In order to prevent the user from not receiving the alarm information, besides the audible and visual alarm is arranged, the SIM800C GSM wireless communication module is used for sending short messages to the user, so that remote communication is realized, and the SIM800C GMS short message communication has the advantages of convenience in use, low price, no need of networking, capability of realizing bidirectional data transmission and the like, and has high cost performance.
The key module 7 is used for setting working parameters of the indoor air monitor, and comprises display content of the display module 5, a formaldehyde concentration alarm threshold value, a PM2.5 concentration alarm threshold value, a temperature and humidity alarm threshold value and the like.
In order to ensure the security of data, besides uploading the data to the data monitoring platform 4 for storage, a storage module 8 is further provided to store the data locally, so as to avoid problems of data loss, data tampering and the like.
A use method of an indoor air monitor comprises the following steps:
s1: the display content, the formaldehyde concentration alarm threshold, the PM2.5 concentration alarm threshold and the temperature and humidity alarm threshold of the display module 5 are set through the key module 7;
s2: the formaldehyde detection module 11, the PM2.5 detection module 12 and the temperature and humidity detection module 13 receive a start signal sent by the controller 2, and respectively acquire formaldehyde concentration data, PM2.5 concentration data and temperature and humidity data according to a preset time period;
s3: the controller 2 receives the formaldehyde concentration data, the PM2.5 concentration data and the temperature and humidity data, transmits the data to the communication module 3, the display module 5 and the storage module 8, and gives an alarm through the alarm module 6 if the formaldehyde concentration exceeds a formaldehyde concentration alarm threshold; if the concentration of PM2.5 exceeds the alarm threshold value of the concentration of PM2.5, an alarm is given through an alarm module 6; if the temperature and humidity exceed the temperature and humidity alarm threshold, the alarm module 6 alarms; otherwise, the alarm module 6 does not alarm;
s4: the communication module 3 receives and transmits formaldehyde concentration data, PM2.5 concentration data and temperature and humidity data to the data monitoring platform 4, the display module 5 receives and displays the formaldehyde concentration data, the PM2.5 concentration data and the temperature and humidity data, and the storage module 8 receives and stores the formaldehyde concentration data, the PM2.5 concentration data and the temperature and humidity data.
In this embodiment, a formaldehyde concentration alarm threshold, a PM2.5 concentration alarm threshold, and a temperature and humidity alarm threshold may be set by the key module 7; in this embodiment, the key module 7 includes 1 self-locking switch S1 and 4 micro switches S2-S5. In different occasions, the alarm threshold values of formaldehyde concentration and PM2.5 concentration are different, and the alarm threshold values of formaldehyde concentration, PM2.5 concentration and temperature and humidity in different fields can be set respectively through the key module 7, so that the application can be suitable for different occasions.
After the STC89C52 microcontroller sends a starting signal to the DHT12 temperature and humidity sensor, the DHT12 temperature and humidity sensor responds and sends data, and the STC89C52 microcontroller reads the data once per second and writes the data into the LCD12864 to be displayed;
collecting the formaldehyde concentration once every 100ms, performing A/D conversion, writing the formaldehyde concentration into an LCD12864 liquid crystal display screen for display, judging whether the formaldehyde concentration exceeds a formaldehyde concentration alarm threshold value by an STC89C52 microcontroller, and alarming;
collecting PM2.5 concentration once per second, performing A/D conversion, writing the PM2.5 concentration value into an LCD12864 liquid crystal display screen for display, judging whether the PM2.5 concentration exceeds a PM2.5 concentration alarm threshold value by an STC89C52 microcontroller, and alarming;
LCD12864 liquid crystal display receives formaldehyde concentration data, PM2.5 concentration data and humiture data, and the conversion number system is back to be shown, can set up the content that LCD12864 liquid crystal display shows through button module 7.
Through key module 7 and LCD12864 liquid crystal display, realized input and output function, man-machine interaction is better.
When the alarm module 6 gives an alarm, the audible and visual alarm gives an alarm to flash red light, and the buzzer sounds for a long time to remind a user that indoor harmful gas exceeds the standard, so that the functions of timely ventilation and reduction of harm of the gas exceeding the standard to a human body are achieved; meanwhile, the SIM800C GSM wireless communication module sends a short message to the user, informs the user of the alarm information, and the content of the short message also can include the current formaldehyde concentration data, PM2.5 concentration data and temperature and humidity data.
In other embodiments, in order to enable a user to remotely obtain an indoor air quality monitoring result and know the indoor air quality in real time, besides the data monitoring platform 4, a short message may also be sent to the user regularly through the SIM800C GSM wireless communication module, where the content of the short message includes current formaldehyde concentration data, PM2.5 concentration data, and temperature and humidity data.
The specific working process of the SIM800C GSM wireless communication module is as follows: the STC89C52 microcontroller sends an AT instruction to the SIM800C GSM wireless communication module to establish connection, and then sends the AT + CMGF to set a short message mode, and the SIM800C GSM wireless communication module sends the indoor air quality condition to a reserved mobile phone number in a short message mode.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (10)
1. An indoor air monitor comprises a formaldehyde detection module (11), a PM2.5 detection module (12), a controller (2), a communication module (3) and a data monitoring platform (4), and is characterized by further comprising a temperature and humidity detection module (13), a display module (5), an alarm module (6), a key module (7) and a storage module (8);
the formaldehyde detection module (11), the PM2.5 detection module (12) and the temperature and humidity detection module (13) are respectively connected with the controller (2);
the controller (2) is respectively connected with the communication module (3), the display module (5), the alarm module (6), the key module (7) and the storage module (8);
the communication module (3) is connected with the data monitoring platform (4);
and the key module (7) is used for setting working parameters of the indoor air monitor.
2. An indoor air monitor as claimed in claim 1, wherein the controller (2) comprises an STC89C52 microcontroller and a power supply.
3. An indoor air monitor according to claim 2, wherein the formaldehyde detection module (11) comprises a DART formaldehyde sensor having pin 3 connected to the positive supply, pin 4 connected to ground, pin 1 connected to PA3 of the STC89C52 microcontroller, and pin 2 connected to PA1 of the STC89C52 microcontroller.
4. An indoor air monitor as claimed in claim 2, wherein the PM2.5 detection module (12) comprises a GSPMS5003 sensor, an RX pin of the GSPMS5003 sensor is connected to a transmission data line USARTI-TXD of an STC89C52 microcontroller, a TX pin is connected to a reception data line USARTI-RXD of an STC89C52 microcontroller, and a SET pin is connected to a PB12 of an STC89C52 microcontroller.
5. An indoor air monitor according to claim 2, wherein the temperature and humidity detection module (13) comprises a DHT12 temperature and humidity sensor, a DATA line DATA of the DHT12 temperature and humidity sensor is connected with a PB11 of an STC89C52 microcontroller, and a clock line SCK is connected with a PB10 of the STC89C52 microcontroller.
6. The indoor air monitor as claimed in claim 1, wherein the communication module (3) is a WIFI module, and the data monitoring platform (4) is deployed on a cloud server.
7. An indoor air monitor according to claim 2, wherein the display module (5) comprises an LCD12864 liquid crystal display, and a TX pin of the LCD12864 liquid crystal display is connected to a receiving data line USART4RXD of the STC89C522 microprocessor and an RX pin is connected to a transmitting data line USART4TXD of the STC89C522 microprocessor.
8. An indoor air monitor according to claim 2, wherein the alarm module (6) comprises a SIM800C GSM wireless communication module for sending alarm information to a user, pin 1 of the SIM800C GSM wireless communication module is connected to ground, pin 2 is connected to the positive electrode of a power supply, pin 3 is connected to U1EX of an STC89C52 microcontroller, and pin 4 is connected to U1-TX of the STC89C52 microcontroller.
9. An indoor air monitor according to claim 8, wherein the alarm module (6) further comprises an audible and visual alarm.
10. Use method of an indoor air monitor, based on the indoor air monitor as claimed in any one of claims 1-9, comprising the steps of:
s1: the display content, the formaldehyde concentration alarm threshold, the PM2.5 concentration alarm threshold and the temperature and humidity alarm threshold of the display module (5) are set through the key module (7);
s2: the formaldehyde detection module (11), the PM2.5 detection module (12) and the temperature and humidity detection module (13) receive a start signal sent by the controller (2), and respectively acquire formaldehyde concentration data, PM2.5 concentration data and temperature and humidity data according to a preset time period;
s3: the controller (2) receives the formaldehyde concentration data, the PM2.5 concentration data and the temperature and humidity data, transmits the data to the communication module (3), the display module (5) and the storage module (8), and gives an alarm through the alarm module (6) if the formaldehyde concentration exceeds a formaldehyde concentration alarm threshold; if the concentration of PM2.5 exceeds the alarm threshold value of the concentration of PM2.5, an alarm is given out through an alarm module (6); if the temperature and humidity exceed the temperature and humidity alarm threshold, the alarm module (6) alarms; otherwise, the alarm module (6) does not alarm;
s4: the communication module (3) receives formaldehyde concentration data, PM2.5 concentration data and temperature and humidity data and transmits the data to the data monitoring platform (4), the display module (5) receives and displays the formaldehyde concentration data, the PM2.5 concentration data and the temperature and humidity data, and the storage module (8) receives and stores the formaldehyde concentration data, the PM2.5 concentration data and the temperature and humidity data.
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| CN115656424A (en) * | 2022-09-07 | 2023-01-31 | 金华航大北斗应用技术有限公司 | Air quality perception monitoring and early warning system |
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| CN208398939U (en) * | 2018-07-27 | 2019-01-18 | 深圳职业技术学院 | A kind of room air detection device |
| CN209447300U (en) * | 2019-03-05 | 2019-09-27 | 南京信息工程大学 | Air monitoring system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115656424A (en) * | 2022-09-07 | 2023-01-31 | 金华航大北斗应用技术有限公司 | Air quality perception monitoring and early warning system |
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