Scientific Inquiry [Issue 18]: Approaching Beidou Satellite Navigation System (1)

2020/11/2210:48:07 technology 761

Approaching the BeiDou Satellite Navigation System (1)

China BeiDou Navigation Satellite System (English name: BeiDou Navigation Satellite System, BDS for short) is a global satellite navigation system developed by China itself, and it is also the third mature after GPS and GLONASS Satellite navigation system. Beidou Satellite Navigation System (BDS), American GPS, Russian GLONASS, EU GALILEO, are the suppliers that have been recognized by the United Nations Satellite Navigation Commission.

Beidou satellite navigation system (hereinafter referred to as Beidou system) is a satellite navigation system built and operated independently by China focusing on the needs of national security and economic and social development. It provides all-weather, all-weather, high-precision positioning and navigation for global users. The important national space infrastructure for service and timing services.

The Beidou satellite navigation system is composed of three parts: space segment, ground segment and user segment. It can provide high-precision, high-reliability positioning, navigation, and timing services for all kinds of users around the world, and has short messages. Communication capabilities, with preliminary regional navigation, positioning and timing capabilities, with positioning accuracy of decimeter and centimeter level, velocity measurement accuracy of 0.2 m/s, and timing accuracy of 10 nanoseconds.

With the development of the Beidou system and service capabilities, related products have been widely used in transportation, marine fishery, hydrological monitoring, weather forecasting, surveying and mapping geographic information, forest fire prevention, communication timing, power dispatch, disaster relief and mitigation, emergency search and rescue, etc. The field has gradually penetrated into all aspects of human social production and people’s lives, injecting new vitality into global economic and social development.

Popular applications

Beidou smart phone applications

Smart phones are the largest mass consumption area of satellite navigation systems. Beidou has very broad application prospects in the consumer electronics market represented by smart phones.

The project has completed a total of 27,704,500 commercial smartphones that support Beidou functions, and has driven domestic chip manufacturers such as HiSilicon and Spreadtrum to develop mobile communication chipsets that integrate Beidou functions; it has formed a technical standard system related to Beidou positioning for smartphones. Completely support the testing and verification platform of Beidou smart phone products and supporting quality testing methods.

Beidou passenger car front-mounted navigation application

In 2013, the Beidou/GNSS passenger car front-mounted intelligent vehicle terminal development and industrialization project started construction, oriented to the application of my country's independent Beidou chips and modules in front-mounted intelligent vehicle terminals. The construction content includes the design and development of Beidou/GNSS combination chips and modules that comply with the pre-installation specifications, and the realization of mass production of pre-installed intelligent vehicle terminals that match Beidou applications. The development and release of the first domestically-made passenger car model equipped with Beidou navigation. As of the completion of the project in 2016, the sales of related models have exceeded 50,000.

Beidou passenger car front-mounted navigation application

application in smart city

Beidou application in public transportation system

With the modernization of the city, traffic pressure is increasing year by year. In response to the frequent road accidents, road congestion and other problems, Beidou system provides Navigation and positioning services can provide transportation management departments with accurate vehicle location information, combined with network transmission and other technologies, will effectively improve the level of road transport supervision, improve congestion control, reduce accidents, and emergency rescue capabilities, and protect people's lives and property.

Currently, it has been applied to online supervision of environmental sanitation support vehicles, real-time public transportation comprehensive information release and Beidou 120 emergency command and dispatch.

Real-time online monitoring page of sanitation vehicles

Beidou gas industry application

Up to now, it has been implemented in more than 500 cities and towns in 24 provinces (municipalities and autonomous regions) across the country, winning the "golden half an hour" for emergency repairs and proactive detection of gas leaks The rate increased from 70% to 90%. The application of Beidou precise location service in the gas industry continuesInnovative and expanding to municipal pipe network fields such as urban heating, tap water and drainage, Beidou has broad application prospects in municipal pipe network fields.

Beidou is fully applied to all business links in the gas industry

transportation application

logistics application

The application of Beidou navigation system in logistics has also greatly promoted its own development. The application prospects of Beidou-based e-commerce logistics services are broad.

Beidou Jingdong Logistics Vehicle Application

Dongting Lake Vessel Beidou Monitoring and Management Application

Yueyang City Fishery Administration Department builds Dongting Lake Vessel Beidou Monitoring and Management System, focusing on solving outstanding problems of ship management around Dongting Lake, and providing all-weather real-time positioning for ships and other operations Navigation and other services and various comprehensive services. The system can be connected to AIS, radar, video and other system data to realize the integration and complementation of various monitoring methods for water moving targets, and meet the omni-directional, all-weather, no-blind-zone, and no-loop dynamic monitoring and command requirements of the fishery administration department for waters , It is of great significance to guarantee the safety of law enforcement, improve the efficiency of law enforcement and strengthen the supervision of law enforcement.

Dongting Lake ship Beidou monitoring and management application

Beidou smart ship lock operation scheduling application

Aiming at the problems of poor coordination of cascade ship locks in the Xijiang River Basin and low passage efficiency, an intelligent gate-passing system based on Beidou technology has been developed to realize the ship passing the gate in the Xijiang River Basin. “One-time lock reporting, continuous lock-passing, reporting without going ashore, non-stop ship payment", to provide ship owners with efficient and high-quality lock-passing services. The system has features such as remote joint dispatching, data sharing and intercommunication, which has changed the situation of data islands that have been formed for a long time in various ship locks in the Xijiang River Basin.

real-time online monitoring page for sanitation vehicles

Beidou bridge health online intelligent monitoring application

Beidou bridge health online intelligent monitoring system, based on Beidou high-precision positioning technology, comprehensively utilizes diversified sensor technology, bridge structure analysis technology, Internet and other technologies, with The advantages of flexible point selection, high precision, unattended, all-weather access to real-time data. Monitor the health of bridges in real time, provide support for bridge maintenance, such as state evaluation, performance prediction, and maintenance decision-making, improve the intelligent and digital level of bridge maintenance, and at the same time assist the bridge maintenance department to scientifically formulate maintenance plans, strengthen the care of critically ill bridges, and take timely measures Countermeasures to avoid safety accidents.

Beidou bridge health online intelligent monitoring application

public safety application

Beidou public security emergency communication command application

Beidou plays an important role in the field of public security emergency communication command. By deploying the Beidou police location service system and the Beidou public security emergency short message service system, the public security organs use the Beidou system's precise positioning and short message communication functions to provide public security with visualized police resource scheduling and emergency response when conventional communication methods fail. Communication guarantee has become an effective means of enhancing the emergency response of public security organs.

Beidou police location service system monitoring page

Beidou police time service application

Beidou police time service relies on the Beidou police time service system deployed by the China Public Security Information and Communication Network. This service can implement the timing and supervision of millions of terminals within the public security information and communication network, and can use the NTP service to implement timing services with an accuracy of 100ms across the entire network.

Beidou grid-based patrol control application

Beidou grid-based patrol control system adopts grid management concept and high-precision Beidou positioning, Internet of Things perception and other information technologies to solve the distribution of urban risk sources, the location of patrol personnel, and emergencies Such as location information collection related issues, assisted in the establishment of grid patrol system and urban risk point prevention and control system, improved the work efficiency of street communities in the management of patrol and defensive

force, and improved the precision crackdown on illegal crimes. The system mainly includes data managementFive functions: management, personnel management, patrol management, risk management, and event management.

Beidou grid-based joint logistics patrol application

Beidou electric bicycle anti-theft application

Electric bicycles equipped with Beidou intelligent anti-theft system, combined with advanced technologies such as big data and intelligent security, can better assist the public security organs in investigating the theft of electric bicycles, providing The real-time status and location information of the stolen vehicles form a new intelligent safety management model for electric bicycles that integrates pre-management, in-event warning, and post-event disposal. Since the installation of the Beidou electric bicycle intelligent anti-theft system, many theft cases have been solved and the lost vehicle has been found for the owner in a short time.

Beidou police location service system monitoring page

Beidou anti-drug combat command application

Beidou anti-drug "cloud + terminal" combat command system, using Beidou positioning and short message communication services, combined with mobile communication technology, video technology and police geographic information technology , It is applied to the phases of drug case clue collection, case investigation, intelligence research and judgment, and final action net collection. It realizes the real-time positioning and return of the public security anti-drug investigation command vehicle, the comprehensive deployment of on-site police force, and the command and dispatch, etc. Drug-related and terrorism-related "overall discovery, source blocking, precision strikes, and prevention and control" capabilities.

Disaster Mitigation and Relief Application

Beidou Comprehensive Disaster Mitigation and Relief Application System. The system integrates functions such as the interconnection and intercommunication of Beidou short messages, mobile phone text messages, and WeChat, and conducts a national "one picture" effective and dynamic remote monitoring of the current location, operating status, and emergency activities of disaster relief personnel and vehicles at all levels. It solves the problem of rapid reporting of the disaster situation at the first time after the disaster and remote all-weather monitoring of on-site emergency rescue activities.

National Disaster Relief Resources "One Picture" Dynamic Location Monitoring (Flood Season)

The Ministry of Transport is also carrying out application deployment in relevant business departments such as China Maritime Search and Rescue Center, provincial maritime search and rescue centers, rescue bureaus, and salvage bureaus. The Beidou short message intelligent shipboard terminal has been installed on maritime and rescue ships, and more than 400,000 sets of Beidou alarm equipment have been promoted to sea-related users.

Beidou Hydropower Station Dam Deformation Monitoring Application

There are currently about 80,000 reservoirs and dams in my country. The Beidou Hydropower Station dam deformation monitoring system uses Beidou multi-frequency high-precision carrier phase differential processing technology to continuously provide millimeter-level slopes of hydropower stations Accurate monitoring data, realizing automatic acquisition, analysis, calculation and storage of dynamic monitoring data; while greatly reducing the intensity of the field, it can quickly collect high-precision three-dimensional point monitoring data, and timely monitor and discover the safety hazards of the dam .