1、 Overview of Internet of things
The application of Internet of things in China is generally in the early stage of development. Many fields have actively carried out the application exploration and pilot of Internet of things, but there is still a certain gap with developed countries in application level. At present, a series of pilot and demonstration projects have been carried out, and preliminary progress has been made in the fields of power grid, transportation, logistics, smart home, energy conservation and environmental protection, industrial automatic control, medical and health care, fine agriculture and animal husbandry, financial services, public security and so on. A basically complete industrial system of Internet of things has been formed in China, and a certain market scale has been formed in some fields. There is a relatively small gap between the network communication related technology and industrial support capacity and foreign countries, but there is a relatively large gap between the sensor, RFID and other sensing end manufacturing industries, high-end software and integration services and foreign countries. Although the industries such as instruments, embedded systems, software and integrated services have a large scale, the equipment and services really related to the Internet of things are still in its infancy.
2、 Visual sand table based on Logistics Network
Visualization mode refers to the virtual display of object equipment using Internet of things technology, and the synchronization with real object equipment data.
Internet of things sandbox technology is based on a variety of visual displays of object devices. The sand table technology solution is integrated and applied to the field of electronic sand table by using GPS / Beidou satellite positioning technology, wireless communication technology and other technologies.
(1) Global Positioning Technology (GPS)
Tracking and positioning of object position; Monitoring of object status; The GPS system is installed on the object and combined with the geographic information system to realize the dynamic requirements of the sand table position.
(2) Wireless communication technology (3G / WiFi)
This technology is the main technology of data transmission of the system. It is applied to the transmission of object identified data, including 3G video data transmission, GPS data transmission, object state data transmission, task allocation and command issuance transmission.
3、 Application case
In order to better reflect the visualization sand table technology based on the Internet of things described in this paper, two implementation cases of case enterprises are selected for analysis and explanation, including intelligent logistics visualization, intelligent disaster visualization, etc. The details are as follows:
(1) Intelligent logistics visualization project
Intelligent logistics solutions use RFID technology, GPS / Beidou satellite positioning technology, sensor technology, Bluetooth technology, video recognition technology, M2M technology and other technologies to be integrated and applied to the field of modern logistics to realize various perception and control in modern logistics. Take logistics management as the core scenario to realize the integration of transportation, storage, packaging, loading and unloading and the visualization of intelligent logistics system.
(2) Intelligent Disaster visualization
Intelligent disasters can effectively detect natural disasters and reduce secondary disasters. Water level monitoring, real-time transmission of water level information, if it exceeds the water level set by the system, alarm information will be generated; Flow monitoring, real-time transmission of water flow information, if it is lower than the ground water flow rate set by the system, an alarm will be generated; Rainfall monitoring, real-time transmission of rainfall information, exceeding the rainfall set by the system and generating an alarm; Video monitoring, real-time transmission of video signals, and remote operation of video head; Remote control, real-time release of road condition information to the indicator screen beside the bridge, and real-time opening of drainage equipment; It can open the interchange U-turn gate in real time; Debris flow monitoring, real-time transmission of soil moisture changes, if it exceeds the threshold set by the system, an alarm message will be generated.