Background

      Smart campus refers to the purpose of promoting the integration of information technology and education and teaching, and improving the effect of learning and teaching, with new technologies such as the Internet of Things, cloud computing, and big data analysis as the core technology, providing a comprehensive environment perception, intelligence, data It is a smart learning environment that integrates teaching, scientific research, management and life services, and can make insights and predictions on education teaching and education management. In the past construction of smart campuses, the IoT solution for environmental monitoring that affects the health and safety of students is rarely mentioned.

   Functional Requirements

       ⚪ Monitor the air quality of classrooms, conference rooms, and dormitories. When the air quality is not up to standard, alarm the IoT platform of the smart campus in time, and the management platform will take corresponding measures.

 

       ⚪ Monitor whether students smoke, install cigarette alarms in places where students smoke, and start calling the police when students or teachers are found smoking.

 

       ⚪ Monitor school trash cans. When the trash cans are full, they need to be reported to the management platform in time, and the management platform will take measures.

 

       ⚪ Monitor the temperature of the school's library and laboratory, and report the real-time temperature and humidity to the management platform.

 

       ⚪ Install door sensors in some unauthorized locations, such as the side door and back door of the school. When someone opens the door, the alarm will be started. 

 

   Feature Design

       Hengyi Technology has accumulated rich experience in the field of wireless transmission and sensors.

            ⚪ Wireless Transmission

                       Facing the large-scale sensor data transfer of buildings, Hengyi's long-distance wireless transmission technology is used to transfer the data of various sensors to the building management platform. Hengyi's 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

                      Hengyi Technology has obtained many patents in the research and development and application of TOF, temperature and humidity, and gas sensors. In this scenario of a smart campus, a variety of sensors are used 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. For unauthorized access, our door sensor sensor can be used.

            ⚪ Overall Functional Block Diagram

                   

   Detailed Implementation Of Functions

            ⚪ Air Quality Monitoring

                       Install air quality monitoring sensors in classrooms, conference rooms, dormitories, and laboratories of the school to monitor the air quality in this area. When the air quality decreases, measures to improve air quality can be taken to increase human comfort and health. 

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

            ⚪ Temperature And Humidity Monitoring

                       Install temperature and humidity sensors in the school's laboratory, warehouse, and kitchen to monitor the temperature and humidity of these landlords, and report the temperature and humidity of these landlords to the platform in real time.

            ⚪ Trash Can Monitoring

                      The management of garbage in schools is also very important. When the garbage is full, it will cause serious health problems if it is left for a long time. Use our smart trash cans in schools to monitor the overflow of garbage and store it 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.

            ⚪ Hand sanitizer and tissue machine residual monitoring

                               Provide hand sanitizer and paper towels in school toilets. The smart soap dispenser and smart paper towel machine developed by our company can automatically report the remaining amount of hand sanitizer and paper machine.

            ⚪ Critical Area Access Control

                      In some areas of the school, 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 will alarm The platform reports to the police.

            ⚪ Toilet squatting monitoring

                      The distribution of staff on each floor of the school is different, and the needs for toilets are also different. Some floors have too many people and the toilets are not enough, and some floors have too many people and there are many vacancies in the toilets. We provide toilet squatting position monitoring sensors, which can report the squatting position usage to the building inspection platform. Users can then check the availability of toilets through the platform.

   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

 

            ⚪ Ambient Air Quality Monitoring

              

         This product is used for indoor air quality monitoring. The monitoring data includes CO2 (carbon dioxide), CH2O (formaldehyde), TVOC (volatile gas), PM2.5 and PM10

          Gas Parameters      

Sensor Type	Measurement Resolution	Measuring Range	Measurement Accuracy
CO2	1ppm	400ppm~5000ppm	±3% (within 50ppm), others ±10%
CH2O	1ug/m3	0ug~2000ug/m3	±10%
TVOC	1ug/m3	0ug/m3~999ug/m3	±10%
PM2.5	1ug/m3	0ug/m3~999ug/m3	±10%
PM10	1ug/m3	0ug/m3~1000ug/m3	±10%

         Function Parameter

Project	Parameter	Remark
Operating Voltage	12V
Working Current	<350MA
Preheat Time	5 Minutes
Operating Temperature	0℃~50℃
Working Humidity	15%RH-80％RH(No Condensation)
Service Life	5 Years (In Air)
Communication Method	Bluetooth	RS485,LORA,CAT1 can be customized
Size	φ120mm*42mm(Diameter*Height)
Weight	150mg
Installation Method	Ceiling Installation