Chinese radar: "locking in" smart life
——Visit the 9th World Radar Expo on-site
A self-driving car can accurately recognize scenes within 300 meters of the surrounding area, and can pass safely even on congested roads.
An intelligent "hand" can accurately perceive the mind of a handicapped person and help him easily grab an apple.
A security gate can complete the security check of the human body in the shortest two seconds, and it can immediately identify even a button in the pocket.
All these benefit from the intelligent application of modern radar technology in the civil field.
In recent years, radar technology has been used more and more in the civilian field. Various types of radar can be seen in meteorology, security inspection, medical treatment, and unmanned driving.
At the 9th World Radar Expo recently held in Nanjing, Jiangsu, a dazzling array of Chinese radar civilian products attracted the attention of many audiences.
The World Radar Expo is the only national, professional and international radar industry exhibition in China. The theme of this exhibition is "Radar Perceives the World, Creates a Digital and Intelligent Future", and launches "Radar Technology and Economic Society", "High-tech and Digitalization" The three themed exhibition areas of "Transformation" and "Defense Electronics and Public Security" gather global radar and defense military industry, civil, electronics and other enterprises to showcase related products, technologies and equipment.
Perceive the world as an extension of man
For people with hand disabilities, the ability to "regenerate" dexterous "hands" is undoubtedly a dream.
The "smart hands" displayed at this expo brought them hope that their dreams would come true.
"Ling Rhinoceros" is a simulated intelligent manipulator that can sense people's thoughts, and the joints can be bent.
A video played at the expo showed that a person with handicapped hands put on a "smart hand", first grabbed an apple with it, then put it down and then picked up a bottle of mineral water and completed the action of drinking water.
The whole process is very smooth.
The research and development of "Bright Hands" benefited from a radar technology, which has been iterated to the fourth generation.
The principle is to abstract human actions into a signal processing process, which mainly includes three parts: brain instruction deciphering, action signal purification and transmission, and accurate realization of manipulators.
This intelligent "hand" with internationally leading level has passed a number of international tests and 1 Ministry of Civil Affairs standard. In addition, it has established a national standard and entered the new international standard (PWI) stage.
In terms of application, the "smart hand" has been tested in many hospitals, and it has broad prospects in areas such as helping the disabled recover their lives and assisting in industrial engineering.
The reporter also saw the research results of the human brain-computer laboratory at the expo.
The Human Brain-Computer Laboratory of the 14th Chinese Department of Electrical Engineering has been committed to the research of brain-computer interface and EEG signal analysis. Recently, in the early symptom screening of Alzheimer’s disease in cooperation with Nanjing Brain Hospital, there are also some Good performance.
Advances in radar technology have made machines an extension of humans, which can help humans complete intelligent and refined operations, such as auto-driving cars.
Whether it is lidar or millimeter-wave radar, it is a hot spot in the field of autonomous driving.
In the radar and autonomous driving sub-forum, a video display of the actual measurement of the autonomous driving road aroused everyone's interest.
Cars equipped with radar can identify scenes within 300 meters of the surrounding area, can accurately distinguish different types of targets such as drones, pedestrians, etc., and analyze and judge the scenes. Scenes such as sudden congestion on highways and complex urban streets Next, intelligent processing can be realized.
Of course, there is still a long process for fully autonomous driving, and in-depth research is needed on the use of sensors, the distribution of locations, and the selection of technical routes.
Catching the wind and rain to create a safety barrier
Beijing Daxing International Airport, monitoring the ever-changing "eye of the sky"-C-band all-digital active phased array weather radar is monitoring the changing weather from time to time.
As the world's first phased array weather radar for commercial application in the civil aviation field, this weather radar adopts the latest technology developed in the radar field in recent years. Compared with conventional radars, it has faster scanning speed, higher detection accuracy and higher reliability. , The detection ability is stronger.
Conventional weather radar takes 6 minutes to complete an 11-layer volume scan, and C-band all-digital active phased array weather radar only takes 1 minute to complete.
At the same time, the radar adopts distributed transmitting and receiving technology, and its reliability is increased from 600 hours of conventional radar to more than 3000 hours.
In addition, the radar has comprehensively improved the clutter suppression, anti-jamming and automatic detection capabilities, and can quickly and more accurately detect dangerous weather that affects aviation safety, such as thunderstorms, strong winds, downbursts, and wind shear. It can capture and analyze the internal structure of dangerous weather in a more refined manner, and provide a detection basis for accurate aviation forecast services.
There is also a miniature automatic weather station on the exhibition site, which can observe local wind direction, wind speed, temperature, air pressure and other information in real time for 24 hours, and customize design according to the needs of environmental monitoring and farmland planting.
It is worth mentioning that the weather station once provided high-precision meteorological data services for the Antarctic scientific expedition and the height measurement of Mount Everest.
In addition to responding to natural disasters, public safety in large-scale places is also a place where radar technology can be used.
A visitor stood inside a security device at the booth, and he stuffed his mobile phone and masks into different pockets.
After the staff set the program, 2 seconds later, the detection image appeared on the screen, and several gray dots were lit, which is a reminder that there are abnormalities in these positions.
This equipment is currently the T-safe X2 active millimeter wave security inspection instrument with the highest working frequency band and highest resolution in China.
Millimeter wave is an electromagnetic wave of a specific frequency band, which can penetrate common clothing, plastic, paper and other materials, and the radiation power is only one thousandth of that of mobile phone signals. It is especially suitable for human security inspection.
This security inspection instrument uses the imaging principle of synthetic aperture radar to transmit millimeter wave signals to the human body. After passing through the clothing, it is reflected by the surface of the human body or objects hidden under the clothing, and receives and records the returned signal amplitude and phase information, which is formed by reconstruction Three-dimensional image of the human body surface.
From this image, it can be determined whether the human body is carrying metal and non-metal objects. The whole process can be inspected in 2 seconds. The resolution of the image reaches millimeter level. The artificial intelligence algorithm can be used to automatically determine the hidden foreign objects carried by the human body and give an alarm.
Empower the industry to create a digital and intelligent future
Zuo Qunsheng, chairman of the China Radar Association, introduced that although there are differences in global technical routes, it is the current consensus of the radar industry to actively integrate into the development of global intelligence and digitization.
As a high-value industry in the national manufacturing industry, radar and related electronic information fields are the masters of modern electronic technology and information technology.
He said that the radar industry must take the initiative in the new round of international economic order reconstruction and industrial development ecological construction process to promote technological integration and innovation, business coordinated development, and industrial transformation and upgrading are very important.
Zuo Qunsheng believes that through artificial intelligence, traditional radars can be turned into intelligent radars, allowing it to learn in different environments and to assist operators in making judgments and decisions.
Hu Mingchun, director of the 14th China Electric Power Research Institute, told reporters that modern radars are technologically developing towards miniaturization and intelligence. With the development of chip technology, processing capabilities in multiple scenarios have improved. Not only can the volume be smaller, but also in system integration. There is also a better performance in platform applications.
If the work of traditional radars is more like "ears and mouths, mouths and mouths", then modern intelligent radars can make comprehensive analysis based on complex scenes for systematic research and judgment.
According to him, in terms of lightweight, the latest radar product volume is only one percent of the original product.
In order to further promote the innovation and development of China’s radar field, Hu Mingchun suggested integrating local superior resources, jointly building a public service platform, deep sharing in industrial planning, resource allocation, innovation paths, talent training, project implementation, etc., and vigorously cultivating familiarity with radar technology and civilian use Cross-border talents in the market.