Tiandiweiye optical fiber high-speed ball in the application of intelligent transportation in Binhai New Area
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Project Overview
According to the “Three-Year Plan for Infrastructure and Environmental Construction in Binhai New Area” recently issued, Binhai New Area will implement 177 major projects in the next three years to build a regionally integrated transportation system, with a total investment of about 225.7 billion yuan. The construction of the intelligent transportation system in the Binhai New Area will effectively increase road management and control time, improve traffic efficiency, improve rapid response capabilities, and liberate road police. It will relieve urban traffic congestion, standardize road traffic order, and realize the functional positioning of Binhai New Area. Improving the image of the city will play an active role. At the same time, the development and construction of intelligent transportation can also provide clues for criminal investigation, public security and other police types to detect cases, and provide urban planning and other departments with accurate traffic flow and flow direction and other basic data. The excellent environmental adaptability, high-speed rotation and precise positioning characteristics of the high-speed ball, as well as the perfect functional characteristics, make its application in the field of road monitoring play a good role.
Project requirements
In terms of intelligent traffic road monitoring system, there are 9 main requirements for the front-end high-speed ball:
Taking into account the 24-hour working conditions of the road and the relatively low light illuminance in most sections of the road at night, the high-speed dome must have a low-illuminance color-to-black function, in order to obtain better shooting results at night;
For applications such as road traffic control, detection of illegal vehicles and clearing of obstructions, the high-speed ball must have a sufficiently high speed and good handling performance;
The roads are all outdoor environments, and the high-speed domes used must have good outdoor performance, including high and low temperature performance and waterproof and dustproof treatment;
Obtain the vehicle model, color, clear license plate image, vehicle speed, recorded time, location and other parameters;
Three highs: high-speed imaging, high-speed storage, and high-speed transmission of images;
Image and data transmission methods: optical cable, coaxial cable, telephone line, microwave, etc.;
Continuous lighting is not needed at night, and the monitoring is concealed; at night, the vehicle model, color, and clear color license plate image of high-speed vehicles can also be obtained;
Obtain a clear image of the driver’s appearance;
Cost-effective.
Technical and functional characteristics of fiber optic high-speed dome
The high-speed dome is developing in the direction of digitization, networking and intelligence. Some domestic old-brand dome manufacturers, while developing the network high-speed dome, have set their sights on the development of the optical fiber dome. At present, the fiber optic domes on the market can be divided into two categories. One is to reduce and modularize the optical transceiver and install it inside the dome. The dome and optical transceiver are two functionally independent parts, although they are also one-core fibers, but in a strict sense In other words, this is not a real fiber optic ball; the other is a single-chip design, with faster processing speed, seamless integration of optical transceiver and ball machine functions, high integration, only a built-in optical module, this kind of fiber optic ball needs technical strength Stronger, it is not a problem for manufacturers who do both high-speed domes and optical transceivers. For example, the optical fiber high-speed dome developed by domestic manufacturers such as Ericsson, Tiandi Weiye, Dahua, etc., integrates the two research and development resources of dome and optical transceiver. The performance of this type of product is relatively stable and the quality is better, leading the development of domestic high-speed dome direction. Following closely behind are some emerging domestic security manufacturers who have not yet jumped into this field. Most of them have obtained a small part of the market through outsourcing or OEM, with low prices and relatively stable performance.
The biggest selling point of the fiber optic high-speed dome is that it completely eliminates induced lightning strikes, avoiding both traditional dome cameras and optical transceivers from being struck by lightning, and the stability of the system has been greatly improved. When the dome cameras are close to each other, the cost of the traditional optical transceiver plus dome camera is the smallest; when the domes are separated by a medium and long distance, the cost of the fiber optic high-speed dome is the smallest; when the dome cameras are separated by a long distance, a self-healing ring is used. The fiber optic high-speed ball of the net has the lowest cost. From the perspective of security engineers, the use of fiber optic balls is the best choice.
Application of Fiber Optic Speed Dome in Intelligent Transportation
The planned area of the starting area of Binhai New Area is 3.6 square kilometers, with more than 30 arterial roads and more than 10 major intersections. In order to cooperate with the use of the intelligent traffic command system, the intersection is also equipped with front-end equipment such as close-up cameras, panoramic cameras, radar speedometers, etc. The signals collected by these devices are all analog, and they also need to receive various control signals from the control center ( Including RS485 signal, switch value, etc.). The starting area is far from the traffic police detachment command center, and there is no network high-speed ball or high-speed ball with the network video server. How to transmit the real-time traffic information of these key intersections and arterial roads to the command center with the best quality, the traditional Simulated high-speed dome can meet the demand, so why choose fiber-optic high-speed dome?
The traditional high-speed ball used in the system needs to consider the video signal, control signal, and power line wiring at the same time. First, the construction is complicated and cumbersome; second is the limitation of RS485 signal transmission distance; and second, the cost is high. In contrast, the fiber optic high-speed dome can fundamentally solve these three problems: First, the single-chip design is adopted, the dome camera and the optical module are seamlessly integrated, and the integration is higher. The video signal and control signal are transmitted through the optical fiber and wired Simple and long transmission distance; Second, in terms of installation structure, it adopts magnetic adsorption structure and anti-dropping design, which is extremely convenient for disassembly and installation, which is convenient for on-site installation and debugging. Third, in terms of aesthetics, because it is led out by optical fiber, it eliminates the need for optical transceivers. Waterproof box, installation is simple and beautiful, and natural lightning protection, anti-interference; fourth, the cost of fiber optic dome is 30% cheaper than the price of traditional high-speed dome plus a pair of optical transceivers; fifth, integrated full-featured high-speed dome in the industry The functions of the machine, such as Chinese and English menu, compass indication, menu lock, privacy protection, 3D positioning and other functions, are more intelligent.
We look at the coordinated application of the high-speed ball from a complete intelligent transportation system, as shown in Figure 1:
Figure 1: Topological schematic diagram of optical fiber high-speed dome used in intelligent transportation system
In this system, the high-speed ball is applied to the intersection, collects the video information of people and cars at each key intersection, connects to the optical transceiver through the optical fiber, and then connects to the optical receiver of the control center through the communication network, and the video signal from the optical receiver is through the video Splitter, one signal is transmitted to the upper screen wall of the control matrix for real-time browsing; the other is transmitted to the hard disk for recording for data storage. At present, the high-speed dome in the industry mainly adopts the RS485 communication standard, and cooperates with the reverse data transmission of the optical transceiver to realize all the motion control of the high-speed dome. At the toll station management station, the pre-position cruise of the front-end high-speed dome is realized through the main control device (control keyboard or software). , Call and scan positioning functions.
In this road monitoring, there are more humanized requirements. The situation of each intersection is different, and the monitoring requirements are different at different times. One type of monitoring action cannot be met. It requires a combination of various monitoring actions to form a “customized” requirement. The optical fiber smart high-speed dome has a mode path function, which can be controlled by a manually controlled camera according to the site conditions. After the high-speed dome is intelligently “learned”, it will be monitored in accordance with the path of the mode. The mode path function can also be combined with the initial position of the high-speed ball. Different actions can be set in 8 time periods around the clock to automatically start different intelligent monitoring paths.
Concluding remarks
To sum up, it is imperative for high-speed dome products to be intelligent, networked, and product diversified in research and development. The use of fiber optic high-speed ball in this system greatly simplifies the installation design, and further improves the management of the system while the safety is improved. With the widespread application of high-speed domes in intelligent transportation and the development of high-speed dome technology, more high-speed domes with special functions will appear and play a greater role in intelligent transportation.
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