Home News Industry Trends Behind lane-level navigation - look at the accuracy breakthrough of high-precision positioning technology and its application scenarios

Behind lane-level navigation - look at the accuracy breakthrough of high-precision positioning technology and its application scenarios

2021-12-28 549

Recently, Amap officially launched the high-definition version of lane-level navigation. This is a major breakthrough in the application of high-precision Beidou positioning and reflects the continuous evolution and development of high-precision positioning technology.

Breakthrough in positioning accuracy: from meter level to sub-meter level

The Beidou system provides all-weather, all-weather, high-precision positioning, navigation and timing services to users around the world. "How it should be used" and "to what accuracy is used" have become issues that have attracted much attention.

The positioning error of 5 to 10 meters in traditional satellite navigation systems is actually unable to meet the needs of production and life. However, since the successful global network deployment in 2020, the Beidou system has brought about earth-shaking changes in people's production and life by providing high-precision positioning services.

The accuracy of high-precision positioning can be divided into several levels: sub-meter level, centimeter level, and millimeter level. In the era of intelligent interconnection of all things, sub-meter or even centimeter-level precise positioning capabilities can meet the needs of various IoT terminals.

At present, with the help of the Beidou ground-based augmentation system, wide-area real-time positioning accuracy of meter level, decimeter level, centimeter level and post-processing millimeter level can be achieved.

Liu Jingnan, academician of the Chinese Academy of Engineering and director of the National Satellite Positioning System Engineering Technology Research Center, once said in an interview: "The Beidou system, which has independent intellectual property rights, In fact, it already has many technical advantages, such as high-precision positioning accurate to the sub-meter level, but it is in urgent need of comprehensive application and promotion. ”

Picture source丨CNA

The newly launched high-definition version of lane-level navigation uses the sub-meter high-precision positioning of the Beidou system to achieve positioning accuracy from 5-10 meters road level to sub-meter lane level. High-precision guidance services are implemented at certain special or complex intersections to comprehensively improve the navigation experience.

This can be described as a major breakthrough in high-precision Beidou positioning applications. Using high-definition rendering technology, the real road scene can be restored on the screen to the greatest extent, including the number of lanes on the current road, ground markings, entrances and exits, special lanes, etc.

In the future, if it is to be applied to intelligent driving scenarios, in order to ensure the safety of autonomous driving, the positioning accuracy requirements for navigation technology may be even higher, and the lateral accuracy of the road generally needs to be less than 20 centimeters. It can be seen that as people's demand for high-precision services continues to increase in production and life, high-precision positioning technology must continue to develop and progress.

Application scenarios of high-precision positioning technology

In the context of the Internet of Things, how to improve operational efficiency through more intelligent technologies has become a direction that various fields are constantly exploring. Location is basic and indispensable information. Higher-precision positioning information can bring higher benefits and value.

(1) Precise flight of drones

High-precision positioning has always been a core requirement in the use of drones. Through high-precision positioning system, It can provide real-time high-precision position information, navigation attitude, speed information, precise time information, etc. for UAVs. After comprehensive analysis and processing combined with other sensor information, the speed and direction of the drone engine can be adjusted to achieve precise takeoff, descent and landing of the drone.

(2) Precision operation of automated agricultural machinery

With the development of urbanization, the scale of agricultural production is getting higher and higher. High-quality operations require a large amount of labor input, and labor costs are very high. And modern agricultural machinery with high-precision positioning services, It can carry out land preparation, plowing and other operations through the automatic driving system. This greatly improves the efficiency of operations such as ridging, sowing, fertilizing, spraying, transplanting, and harvesting.

In addition to outdoor scenes with little occlusion, high-precision positioning technology will also be applied to more complex scenes. With the rise of the Internet of Things, indoor positioning has benefited from strong location awareness capabilities and has ushered in a golden period of development.

(1) Application in shopping malls

In commercially intensive areas such as large shopping malls, not only are there many shops, but the browsing paths are also complex, so people will have navigation needs in these places. Indoor positioning technology allows people to quickly find their destination through convenient indoor navigation. High-precision indoor navigation can even guide people to quickly find products on the shelves.

(2) Application in hospitals

As the construction process of smart hospitals accelerates, more and more large hospitals are beginning to use high-precision positioning technology to improve the management level of medical equipment. Through the precise positioning of medical equipment, the detailed location and usage data of the equipment can be obtained in real time, and the efficiency of the use of core assets can be greatly improved. In addition, real-time monitoring of special patients can also be achieved to effectively prevent accidents.

Picture source丨Lingsike

(3) Application in construction sites

In construction sites such as chemical plants, subway construction, and tunnel construction, the positioning of personnel is a rigid need. In these scenarios, on the one hand, from the perspective of employee safety, employees need to be positioned and alerted for help when they are in danger; on the other hand, visitors need to be positioned and managed in these places to prevent visitors from entering dangerous areas. Currently, in many construction scenarios, project parties will provide a certain proportion of funding support for positioning services.

In the future, high-precision positioning needs to be expanded to more scenarios, from outdoor to indoor, from driving to walking, and ultimately achieve full scene coverage.

Some sources of data: CCTV, Indoor Positioning Theory, Beidou Today has slightly adjusted the article

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