Design of smart home home environment monitoring system
Design standards and specifications
Home environment monitoring system design should follow the following standards and specifications:
(1) "Code for indoor environmental pollution control of civil construction projects" (GB50325-2010)
(2) Indoor Air Quality Standard (GB/T18883-2002)
(3) Ambient Air Quality Standard (GB 3095-2012)
(4) "House Design Code" (GB50096-2011)
(5) "Technical Guidelines for Environmental Monitoring Quality Management" (HJ 630-2011)
(6) "Code for indoor environmental pollution control of civil construction projects" (GB50325-2001)
Among them, Chapter 6 of the “Code for Control of Indoor Environmental Pollution of Civil Building Projects†stipulates that when the civil construction project is accepted, it is necessary to carry out indoor environmental pollutant concentration testing.
How to set up a home environment monitoring system
The home environment monitoring system is a subsystem in the smart home. It also includes indoor temperature and humidity monitoring, indoor air quality monitoring, climate monitoring outside the window, and outdoor noise monitoring. How to set up a home environment monitoring system depends on the quality of the local external living environment to design an indoor environment monitoring system. If it is located in an area with severe air pollution, indoor air quality monitoring should be the main focus; if it is located in an area with low and humid air temperature all year round, indoor temperature and humidity monitoring should be the main focus; if it is located in a busy downtown area, it should be The main focus is on outdoor noise monitoring; if it is located in an area with constant changes in climate, it should be based on outdoor climate monitoring. In general, building a home environment monitoring system should be based on applicability and stability. The indoor air quality monitoring of a three-bedroom, two-room residential building is taken as an example to describe how to build a home environment monitoring system.
At present, chemical pollution is the most serious in indoor air, and the main toxic and harmful gases are volatile organic gases such as formaldehyde, benzene, and benzene series, and ammonia and helium.
According to the regulations on the activity and concentration of residential indoor air pollutants specified in the “Residential Design Code†and the “Environmental Air Quality Standard†on the 24-hour average value of PM2.5 pollutants, the indoor environmental pollutant concentration detection point is the installation of air. The number of quality sensors should be determined by the size of the room. When the indoor room area is 100m2, 3-5 air quality sensors should be installed. The installation position of the air quality sensor should be not less than 0.5m from the inner wall surface, 0.8-1.5m from the floor height of the building, and must be evenly distributed to avoid ventilation channels and vents.
Indoor air quality monitoring is mainly composed of indoor air quality sensors, control hosts and actuators. The sensor's function is to monitor the indoor air quality in 24 hours and transmit it to the control host through the wireless ZigBee network. The control host issues corresponding instructions to control the display, alarm, air purifier, and electric window opener based on the source and degree of the sensor's indoor air pollution. In this example, the residential area is about 120 rri2. Four air quality sensors and air purifiers are designed and installed. They are installed in two bedrooms, a living room and a restaurant, and a control host, monitor, and alarm are installed in the living room.
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