At present, the communication technology in the factory is GPRS, but its cost is extremely high, and the traffic fee paid by the company needs tens of thousands of yuan. National factories call for energy conservation and emission reduction, and effective methods can be more suitable for factory needs. How to use LoRa wireless network to achieve energy saving and emission reduction in factories is the theme of today.
According to statistics, in 2011, the total electricity consumption of electric motors in China's industrial sector was 2.6 trillion kWh, accounting for 75% of industrial electricity. The system adjustment method is backward. Most fans and pumps are regulated by mechanical throttling, and the efficiency is about 30% lower than the speed regulation mode.
If the overall efficiency of the motor system is increased by 5-8%, the annual energy saving can reach 1300-300 billion kWh, which is equivalent to the power generation of 2-3 Three Gorges power stations. Therefore, the energy efficiency improvement of the motor and the energy-saving transformation of the motor system are carried out. A must for sustainable development and industrial upgrading.
Now IoT technology helps factories save energy and reduce emissions. As shown in the figure below, the three common loads of motor and water pump, ventilator and air compressor are tested for energy efficiency. The detected data is collected by the Ruimi LoRa terminal to the Ruimi LoRa gateway, uploaded to the cloud server, and completed by the cloud platform. Energy-saving assessment and solution testing, authorized terminals and smartphones can view and manage energy-saving devices.
At present, the communication technology in the factory is GPRS, and its maintenance cost is high. If a factory has hundreds of nodes, the traffic fee paid by the mobile company for one year is tens of thousands of yuan. After using the Ruimi IoT, there is no maintenance cost because LoRa wireless works in the free band. LoRa is an ultra-long-range wireless communication technology that can reach 5km in an open environment. It also uses spread-spectrum modulation to provide excellent anti-interference and easily meet the challenges of the factory electromagnetic environment.
The Ruimi LoRa Gateway (hereafter referred to as the Gateway) is a LPWAN (Low Power Wide Area Network) product provided by Ruimi Technology. It can quickly build an IoT system by combining the Ruimi LoRa terminal and the Rui Miyun server.
Based on ultra-low power design, the terminal sleep power consumption is as low as 1.4uA, which is especially suitable for battery-powered products. In a typical acquisition application, two 5th batteries can work effectively for 10 years.
Based on TDMA (Time Division Multiplex) communication technology, all terminals in the network communicate without collision, maximize bandwidth utilization, no retransmission delay, improve overall network QoS, and reduce overall network power consumption. After the gateway is simply configured, it can be automatically networked with the terminal, and it can work by power-on. Any network maintenance is required, which greatly reduces the user's complexity and maintenance cost.
Built-in multiple wireless communication robust technology, intelligent solution: communication collision, weak signal, external interference, disconnected network and other challenges, providing a long-term stable operation of the Internet of Things system.
case analysis:In the factory, an intelligent monitoring system for “energy saving and emission reduction†is arranged. A total of 40 terminals are set up. Each terminal collects the following indicators of the motor: voltage, current, frequency, power, temperature, etc., totaling 30 bytes.
The first step: purchase 40 Ruimi LoRa terminals, the sensor system is connected to the terminal through the UART port, the sensor system transparently transmits the motor measurement data to the terminal, and the terminal will automatically upload the motor data to the gateway.
Two steps: Purchase a Ruimi LoRa gateway and work with the following simple configuration of the gateway.
Terminal single upload maximum byte = 30; terminal node number = 40
The third step: purchase and build a cloud server, connect the gateway data to the cloud platform, store the data, and provide authorized terminal download and calculation.
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