Background

       The exhibition center has a large area, and receives many people and flows. In order to maintain a comfortable environment, it is necessary to maintain a suitable temperature and proper air flow in the first place of the venue. It is necessary to detect the temperature and humidity of each interval and the air quality in real time, so as to control the temperature, humidity and air circulation speed of the venue.

   Functional Requirements

       ⚪ The air quality monitoring in the venue can effectively monitor the conventional air quality parameters and harmful gases.

       ⚪ Real-time monitoring of temperature and humidity in venues.

       ⚪ Monitoring of particulate matter in venues.

       ⚪ Wireless transmission of sensor data in the venue.

       ⚪ Monitoring of the remaining amount of hand sanitizer and tissue machine in the exhibition hall.

       ⚪ Smoking testing in public areas.

       ⚪ Monitoring of the number of people in the exhibition hall.

   Feature Design

       There are three main components of this solution, wireless transmission, sensors, and IoT management platform.

            ⚪ Wireless transmission

                       Facing the large-scale sensor data transfer of the exhibition hall, our company's long-distance wireless transmission technology is used to transfer the data of various sensors to the building management platform. Our wireless technology uses a combination of LORA, 2G/3G/4G/5G/CAT1 (mobile network) and Ethernet. Use LORA locally to transmit sensor data to the gateway, which in turn transmits the data to the platform via a mobile network or Ethernet.

            ⚪ Sensor

                       Our company has obtained many patents on the research and development and application of TOF, temperature and humidity, and gas sensors. This kind of scene in the pavilion uses a variety of sensors to achieve the role of environmental monitoring. For the residual monitoring of the tissue machine, the imminent measurement of the toilet squatting position, and the overflow monitoring of the trash can, the TOF sensor is used to realize. The temperature and humidity sensor developed by our company is used to monitor the temperature in the building. For air quality monitoring in buildings, use our air quality monitoring sensors.

            ⚪ Management Platform

                       The management platform can carry out a detailed management of the equipment. It can display real-time data in real time, save data, and find historical data.

            ⚪ Overall Functional Block Diagram

                   

   Detailed Implementation OF Functions

            ⚪ Air Quality Monitoring

                       Install air quality monitoring sensors in the office area, conference area, and corridor area of ​​the building to monitor the air quality in this area. When the air quality decreases, measures to improve the air quality can be taken to increase the comfort and health of the human body.

                       For some places where smoking is prohibited, install cigarette detection sensors to monitor whether anyone smokes.

            ⚪ Temperature and humidity monitoring

                       In the material storage places of the building, some places that are sensitive to temperature and humidity, use our company's temperature and humidity sensors to monitor.

            ⚪ Trash can monitoring

                       The waste management of the building is also very important. When the waste is full, it will cause serious sanitation problems if it is left for a long time. In the public area, our company's smart trash cans are used to monitor the overflow of garbage, and store the garbage in a closed manner to prevent the spread of odors. When the trash can is full, or the smell is relatively strong, the monitoring module will be sent to the monitoring platform through wireless technology, and the monitoring platform will take corresponding measures to solve the problem.

            ⚪ Critical Area Access Control

                       In some areas of the building, people are not allowed to visit, or some doors and windows are not allowed to be opened. Our company's door sensor will play a role in monitoring the safety of these areas. When there are some unconventional operations in these areas, the door sensor alarm will send The platform reports to the police.

            ⚪ Crowd Statistics

                     Install people flow counting sensors at each entrance to count the number of people entering the hall. The precise number of people can be used as the hall empty.

   Detailed Introduction OF Key Products

            ⚪ Multifunctional Wireless Gateway

                 

Parameter		Describe
Master	Master	Industrial Grade CPU, Main Frequency 540MHZ
	DDR	64M Byte, The highest frequency supports up to 360MHz
	FLASH	32M Byte
Wireless	LORA	430~434MHZ, Others can be customized 913~918MHz
	WIFI	2.4GHZ, support IEEE802.11b/g/n
	2G/3G/4G/5G	FDD-LTE/TDD-LTE/DC-HSPA+/HSPA+/HSPA/WCDMA/TD-SCDMA/GSM/GPRS/EDGE
	SUB 1G(custom made)	430~434MHZ,Others Can Be Customized 866~918mhz
Hardware Parameters	Data Interface	1 Ethernet interface, 1 WIFI, 1 2/3/4G, 1 RS485
	Supply Voltage	DC 6V~14V input; can be customized DC6-36V
	Working Environment	Working Temperature -10℃~75℃, Humidity 0%~90%rh
	Current Consumption	Working current: <200mA/12V, maximum current 500mA/12V
Software Agreement	Operating System	LINUX 3.4
	Network Protocol	IP,TCP,UDP,HTTP,HTTPS
	Wireless Protocol	LORA, WIFI protocol, ad-hoc network LORA protocol
	RS485	Modbus, Custom 485 Communication Protocol

 

            ⚪ Introduction of sensor parameters in the exhibition hall

                 Appearance of the sensor

              

                 Parameters of temperature and humidity

specification	parameter
temperature Range	-40~ 125°C
Temperature Accuracy	±0.3°C
Temperature Resolution	0.015°C
Humidity range	0%RH ~ 100%RH
Humidity Accuracy	+2%
humidity resolution	0.1%RH
L .oRa< /td>	Custom LoRa Protocol
RS485 MODBUS protocol

                 Parameters OF Carbon Dioxide

specification	parameter
CO2 concentration range	0-5000ppm
CO2 concentration accuracy	t (50ppm+5% reading)
CO2 concentration resolution	1ppm
Monitoring area	20 square meters
LoRa	Custom LoRa Protocol
RS485	MODBUS protocol

                 Parameters of PM2.5/PM10

specification	parameter
particulate matter Range	0-1000ug/m3
s 100ug/m3: soil 10ug/m3; > 100ug/m3: t 10%
Monitoring area	20 square meters
L oRa<	Custom LoRa Protocol
RS485	MODBUS Agreement

                 Parameters of formaldehyde

specification	parameter
formaldehyde Range	0~1ppm
Formaldehyde Accuracy	s0.1ppm: +0.025ppm >0.1ppm: 25%
Formaldehyde Resolution	1ppb
Monitoring area	20 square meters
L .oRa	Custom LoRa Protocol
RS485	MODBUS protocol

                 Introduction to Display Terminals

                  Appearance

                   

                   Parameter

                             Button

hardware	parameter
display Screen	3.5 inch LCD screen
1 power button, 1 shutdown button
External interface	1 USB serial port, 1 power interface, 1 RS485, 1 LoRa interface