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1. System introduction
The wireless cultural relics environmental monitoring system focuses on large-scale environmental monitoring applications in harsh scenes such as the wild lack of infrastructure such as power supply and communication. The system adopts a three-layer network communication architecture combining wireless data acquisition network, wireless data forwarding network and Internet. The wireless environment monitoring sensor uses battery for long-term power supply, collects environmental data and transmits data through a low-power multi-hop wireless self-organizing network. There is no need to build infrastructure such as cables and communication cables within the data collection network. Automatically relay and forward data to each other, which can ensure the reliability of networking and communication, and can expand the deployment scope of the monitoring network and reduce the difficulty of deployment. The long-distance wireless repeater uses long-distance wireless communication technology to forward environmental data to an environmental monitoring router connected to the Internet, thereby greatly expanding the scope of system deployment in harsh scenarios. The environmental monitoring router pushes the data to the data processing and access server. Corresponding staff can use the computer’s Web browser to query the latest environmental data and historical data in real time, and analyze the current environmental conditions.
In order to facilitate maintenance operations during long-term system operation under severe scenarios, the system integrates remote system status monitoring functions. This function can report the current status of all equipment in the system in real time and assist maintenance personnel to analyze the cause of failure.
2. Wireless environment monitoring sensor
The wireless environmental monitoring sensor adopts high-precision temperature and humidity sensors and gas sensors for meteorological monitoring, environmental monitoring and other needs, and has a wide temperature, high-strength waterproof, dust-proof, and UV-proof node design, which can perform fast and accurate environmental data collection. In addition, considering the requirements of environmental monitoring applications that can be quickly and flexibly deployed in various environments and places, the device adopts the latest wireless sensor network technology to transmit monitoring data by wireless communication, and the devices can communicate with each other. Data relay, which can greatly expand the range of data transmission. The power consumption of the equipment is extremely low. In the self-organizing multi-hop networking mode, using 2 AA batteries (temperature and humidity monitoring equipment) can work continuously for more than 1 year (1 minute communication cycle). The main technical indicators of the equipment are as follows:
Monitoring capabilities: temperature, humidity, carbon dioxide concentration, etc.
Range: temperature -40℃~+85℃, humidity 0~100%, carbon dioxide 0~2000ppm, 0~5000ppm
Monitoring accuracy: temperature ±0.3℃, humidity ±1.8%, carbon dioxide concentration ±3%
Monitoring data collection interval: adjustable from 1 second to 15 minutes
Data storage capacity: ≥100,000 records
Wireless communication frequency band: 2.4GHz ISM frequency band
Communication rate: 250kbps
Wireless communication distance: 400 meters (line of sight)
Networking mode: mesh network
Power supply mode: 2 AA batteries (temperature and humidity sensor), DC 12V input (carbon dioxide sensor)
Continuous working cycle: ≥1 year (temperature and humidity sensor)
Working temperature: -40~85℃ (temperature and humidity sensor), 0~50℃ (carbon dioxide sensor)
Equipment installation method: horizontal/wall-mounted
Dimensions (L×W×H): 95×75×32mm (temperature and humidity sensor) / 95×75×47mm (carbon dioxide sensor) (without antenna)
Protection level: IP53 shell protection
3. Data processing and access server
The data processing and access server receives the monitoring data sent by the gateway device, analyzes the data, and saves it in the database. The server provides Web-based data query, statistics, analysis and other processing functions, and provides complete monitoring network management and equipment management functions.
Data observation page
Data curve observation
Discharge curve of 2 AA batteries within one year
Beijing Yuntianchuang Technology Co., Ltd. was established in July 2008. It is a young company engaged in the research, development, production and sales of wireless communication technology and products. Since 2005, the core staff of the company have been committed to the research and development and application of wireless sensor network communication products. They have rich experience in wireless communication system design and provide users with personalized network communication solutions with professional technology and good service capabilities.
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