Intellifusion escort Hong Kong-Zhuhai-Macau Bridge successfully

Involving the entry and exit points of the three sides of the Taiwan Strait, the quarantine prevention and control work of vehicles and personnel is particularly important. In order to improve the driver's efficiency, Intellifusion provides a customi

On the morning of October 23, the opening ceremony of the Hong Kong-Zhuhai-Macao Bridge was held in Zhuhai. The cross-sea bridge, which was prepared for 6 years and built for 9 years and cost more than 100 billion yuan, was called "one of the seven wonders of the modern world". General Secretary of the CPC Central Committee, President of the State, and Chairman of the Central Military Commission Jinping Xi attended the ceremony and announced the official opening of the bridge. On October 24th, the bridge was officially opened to traffic.

The Hong Kong-Zhuhai-Macao Bridge is the cross-sea bridge project with the longest mileage, the most investment and the most difficult construction in China's construction history. The bridge has a total length of 55 kilometers, a seabed immersed tunnel of 6.7 kilometers, and a service life of 120 years. It can withstand 16 typhoons, 8 magnitude earthquakes, and the violent impact of 300,000 tons of huge wheels. It is a veritable super project.

Super engineering is also extremely difficult. The height is too low to affect the shipping of ships. The height of the ship affects the safety of the airport in Hong Kong. How can the bridge be balanced? How does an artificial island reinforce the ocean currents and sea breeze against the direction? How to achieve the goal of “Do not move” for the white dolphin near the bridge?

The solution to super difficulties is inevitably top technology. More than 400 patents; the world's largest steel bridge construction; the world's longest subsea tunnel production floating installation; China's first deep-injection steel cylinder rapid island technology... Hong Kong-Zhuhai-Macao Bridge top technology is reflected in the construction of each A detail. Shenzhen Intellifusion Technology Co., Ltd. has become a part of the smooth passage of the Zhuhai-Macao Bridge in the escort port with its deep technical strength.

The most difficult, longest and deepest submarine highway immersed tunnel in the world

In order to solve the problems between the bridge, shipping and flight safety, the engineers adopted a plan to build a section of the undersea tunnel, build two artificial islands, and connect the tunnel with the bridge.

The Hong Kong-Zhuhai-Macao Bridge Cross-Harbour Tunnel has a maximum installation depth of more than 40 meters and is connected by 33 immersed pipes. Each standard immersed pipe section is 180 meters long, 38 meters wide and 11.4 meters high. The displacement is 78,000 tons, equivalent to a full load. Liaoning aircraft carrier. These immersed tube installations have errors of less than 0.5 mm.

In order to resist the erosion of seawater and ensure that the tunnel dripping does not leak, the immersed tunnel uses a concrete with strong impermeability, the microstructure is very dense, and it is difficult for harmful ions to directly infiltrate. The reinforcement ratio of the steel cage inside the tunnel wall far exceeds the general building structure, which plays a very strong restraining role, and strictly limits the macroscopic cracking of the concrete and the expansion of the micro crack.

"Steel Cylinder Island" completed the two islands in 221 days

The cost of the artificial island of the Hong Kong-Zhuhai-Macao Bridge is as high as 13.1 billion yuan. The Hong Kong-Zhuhai-Macao Bridge has chosen the rapid islanding scheme of “Steel Cylinder Island”, which uses 120 large-diameter steel cylinders with a diameter of 22 meters to be directly fixed on the seabed. At the bottom of the sea, fill the soil in the middle to form an artificial island. The island wall of the artificial island weighs 500 tons, and its construction method and eight-hammer linkage hydraulic vibratory hammer are the world's first.

In the ocean, how to drain the island from the original location is a big problem. The project adopts a new construction scheme of partial excavation replacement and well point precipitation combined with surcharge, which not only accelerates the consolidation, but also reduces the residual settlement after the project and ensures safety. Under the support of a solid foundation, the built artificial island has an elevation of 5 meters, which can resist the flood of the Pearl River Estuary in 300 years.

China Mainland, Hong Kong and Macau mixed cars, only 0.3 seconds to identify the license plate

The vehicles that will be used in the Hong Kong-Zhuhai-Macao Bridge will not only have mainland vehicles with uniform format license plates, but also vehicles in Hong Kong and Macau with various license plate formats. The mainland and Hong Kong implement different toll collection modes. The software and code of the two charging modes are very different. It is very difficult to make the two compatible.

The Hong Kong-Zhuhai-Macao Bridge Project Department started from software code and software programs, and specially invited Hong Kong technical experts to participate in the development. According to the experimental test situation, the test version was revised continuously. Only the test version was modified to 136 times. It lasted for two years and was the world's first compatible. Different modes of charging.

After a total of 1110 simulation tests, the average recognition rate of license plates increased from less than 30% to 96.7%, and the average recognition time was reduced from 0.5 seconds to 0.3 seconds.

Infrared temperature measurement system + face recognition, help wisdom edge check

Involving the entry and exit points of the three sides of the Taiwan Strait, the quarantine prevention and control work of vehicles and personnel is particularly important. In order to improve the driver's efficiency, Intellifusion provides a customized solution for the driver's detection, combining the first innovative infrared face detection algorithm with efficient and accurate face recognition comparison service.

Innovative infrared face detection algorithm

In the event of personnel clearance, in order to prevent high temperature personnel from crossing the environment, the temperature detection of the infrared temperature measuring camera is required, but the traditional infrared temperature measurement can only recognize the highest temperature area in the picture, and the alarm prompts the staff after exceeding the set alarm threshold. Each alarm needs to confirm whether it is the high temperature warning of the personnel themselves, and increase the manual verification workload.

Intellifusion optimized this scene, and developed a tracking and detection algorithm for infrared face through deep learning algorithm technology. By detecting the face in the infrared scene, the position of the face in the picture is marked, and then combined with high temperature. The coordinate position of the alarm point determines whether it is a face alarm, which greatly reduces the manual verification workload of the staff, and the effective alarm is as high as 99.7%.

Efficient and accurate face recognition comparison service

Combined with the actual scene requirements of customs clearance verification, the traditional face comparison is not only time-consuming, but also the accuracy is not guaranteed. The practice of fingerprint verification personnel is relatively long, and it is accurate and efficient. It is impossible to balance.

In order to achieve efficient and accurate face comparison, Intellifusion technical team repeatedly tested seven or eight short-focus cameras, ensuring the size of close-up portrait capture in the border inspection, and in order to solve the infrared heat imported from Germany. The imaging camera and the visible camera frame are not synchronized, and the R&D team trained a new algorithm for the Hong Kong-Zhuhai-Macao Bridge.

Through the introduction of Intellifusion face recognition comparison service, it automatically compares with the system registration personnel. The result of feedback comparison within 1 second, the accuracy rate is up to 99.5%, the customs clearance efficiency is increased by more than 10 times, which is efficient and accurate, and achieves the highest speed. Clearance.

The completion of a super project is inseparable from everyone who makes an effort, and cannot do without every company that contributes. The smooth opening of the Hong Kong-Zhuhai-Macao Bridge is a proof of the strength of the construction of China's cross-sea bridges. It is a testament to the achievements of scientific and technological innovation. Intellifusion is proud to be a part of the opening of the escort bridge!