The security industry needs to solve the technical problems caused by heavy fog

As the eastern coastal areas and some cities in the central part were affected by heavy fog, the airport could not normally take off and land. As a result, flights to Beijing were canceled and the corresponding flights returning from Beijing could not be implemented. At around 16:00 on the 1st, the capital airport cancelled a total of about 30 arrival and departure flights.

Qingwei Expressway was closed due to fog for two hours. Two flight delays According to Weihai News Network, on the morning of December 1, Wuduo Wendeng and Qingwei Expressway Wendeng were closed for 6 hours. Two flights at Weihai Airport were delayed and some long-distance buses were delayed.

At 8 a.m. the same day, reporters saw at the entrance of the Qingwei Expressway that the roadside electronic screen displayed the words “High-speed fog is blocked across the board”. A long-distance bus driver heading for Weifang called anxiously to ask about other road conditions. Some long-distance truck drivers stepped out of the cab and waited and waited on the side of the road.

The staff of the Expressway Management Office told reporters that they were busy listening to the public's inquiries throughout the morning. Many drivers had adjusted their travel plan after hearing about the high-speed closure. Therefore, there were not many vehicles waiting at the high-speed entrance. The reporter was informed that due to the influence of dense fog, the Qingwei Expressway Wendeng Section was closed at 4 am, and it was opened at 10:30 a.m., and the closing time was more than 6 hours. This is also the longest time for high-speed closure this year.

“In foggy weather, ask the driver to be careful.” The Wendeng bus station uses loudspeakers to remind the driver to walk slowly. On the same day, long-distance buses from the direction of Surabaya, Gaomi, Linyi, and Hefei reached the Wendeng Bus Station in the morning and were delayed to varying degrees.

Due to the high speed of the Qingwei Expressway, some of the vehicles turned away from the 309 National Highway and the 202 Provincial Highway. The staff of the 309 National Highway’s Gejia Toll Gates told reporters that from 7 a.m. to 11 a.m. on that day, the traffic on the 309 National Road increased by 30% compared with the usual time. The increase in traffic is mainly due to long-distance trucks and buses. There are also some plans to pass the 309 National Highway through the private cars of Greenway Express.

At 12:00 in the morning, the reporter learned from Weihai International Airport that due to the heavy fog, two flights were delayed on the same day. The flight scheduled for 8 hours from Incheon to Weihai in South Korea was postponed to 11:40. It was originally scheduled for 8:5 in Shanghai. Weihai flights, due to the same heavy fog weather in Shanghai, flight flow control work was delayed, after the arrival and departure conditions at Weihai Airport, the Shanghai direction of the flight has not yet been issued. According to statistics, the heavy fog on that day caused more than 400 passenger trips to and from Weihai to be affected.

In winter and bad weather such as heavy snow and fog, a complete traffic command and control system is the key to ensure the smooth and orderly operation of the transportation network. Front-end monitoring equipment is the “eye” of traffic command and control. In the event of changing weather conditions, higher requirements are placed on performance, specialization, and reliability of traffic surveillance cameras.

Fog monitoring is essential for fog technology. Winter is a season with heavy fog. In December and January, it is a fog period in most areas. Fog causes low visibility on the ground. It is a high-risk weather for aviation, highways and other transportation areas. In particular, the highway is most affected by heavy fog. In the near future, the continuous haze in the central and eastern regions is even more important. Highway pavement monitoring presents even greater challenges. Although there are professional fog surveillance cameras, the screens are black and white. This type of camera has a high purchase cost and cannot meet the demand for color monitoring. Under the situation that the highway mileage of our country keeps increasing, in order to deal with the influence of the heavy fog weather in winter, it is the trend of the times to increase the monitoring quality in the foggy environment and reduce the monitoring cost.

In order to meet the transportation industry's demand for low-cost, high-quality fog cameras, Digital China introduced the AMPON Series DCS-B730 and DCS-B530. It is understood that this camera uses a self-developed image gain engine technology with image optimization circuit, which can automatically detect the fog data in the image, adjust the dynamic range curve of the graphics in real time, and strengthen the color reproduction degree, so that the camera is equipped with The color penetrating function can make the scene in the fog clear and visible in the case of color mode, and because of its good cost performance, it can be widely used in highways, ports and other monitoring sites that are greatly affected by the external weather environment.

High-definition and low-illumination provide an important indicator for monitoring the performance of a camera for winter surveillance. In the case of snow and fog and other harsh winter weather, the visibility of surveillance images becomes more visible under conditions of low visibility. Particularly important. Surveillance cameras need to accurately identify relevant vehicle information in poor visibility and low visibility. The vehicle surveillance image must be able to see the license plate number. If the above requirements cannot be met, traffic surveillance will lose its own significance in bad weather. To a certain extent, it affects the smooth and orderly operation of the transportation network. In addition, because most of the traffic surveillance cameras are installed outdoors, under the dark light conditions in snow days, more stringent requirements are imposed on the minimum illumination of the cameras.

Through the above analysis, it is not difficult to find that in the severe winter weather such as heavy snowfall, the camera has higher requirements in terms of high-definition and low illumination. Taking China Digital AMPON DCS-B530 as an example, this model uses the world-leading SONY Super HAD II CCD, and has a unique ultra-low illumination technology, with good low-light performance, minimum illumination of 0.06 in color mode Lux, while in the black and white mode, the minimum illuminance reaches 0.008Lux, and the screen is clearer in a low-illumination environment, effectively satisfying the requirements of the transportation industry for monitoring image quality in a dark, snow-lit environment.

In addition, the DCS-B530 uses a unique ultra-high resolution technology. In color mode, the model's horizontal resolution is 560 lines, and the black and white mode is 600 lines. It can fully meet the highways, toll stations, and traffic intersections. The monitoring needs of other important traffic sections in severe weather conditions.

昼 Short night long night surveillance is particularly critical Due to the different monitoring environments, there are many special requirements for traffic monitoring compared to other industries. This puts higher requirements on the professionalism of traffic surveillance cameras, especially in the future. Short winter nights have a relatively short illumination time throughout the day and require surveillance cameras to be more suitable for monitoring needs in nighttime environments.

Take the traffic light identification as an example. At an unattended traffic intersection, the traffic light is the key to maintaining a smooth and orderly road, and the camera is an important tool for recording violations of the vehicle's red light. In normal daylight conditions, ordinary cameras can easily identify traffic lights. In nighttime darkness, the traffic light is beyond the range that ordinary video cameras can recognize. Therefore, at night, the camera cannot automatically recognize the status of the traffic light pattern, which will extend a lot of related issues. For the special requirements of traffic monitoring for nighttime traffic lights recognition, the newly developed AMPON DCS-B730 camera adopts a newly developed traffic light identification function, which can easily realize the identification of night traffic lights, and effectively solves the identification problem of the traffic lights that ordinary cameras can not solve at night.

In addition to the traffic light identification, during the night monitoring process, the strong light directly from the car headlights will seriously affect the license plate number of the camera collection vehicle. In order to be able to clearly capture the relevant vehicle information at night, different glare lights are required. Environment, do multiple different light suppression. In response to the above problems, the AMPON DCS-B530 has also adopted the light suppression function. The strong light suppression function can effectively suppress the strong light from direct lighting at night. The suppression level can be set flexibly, and the license plate number of the fast-moving vehicle can be collected more clearly, which is more convenient for license plate identification and forensics. In addition, DCS-B530 adopts ICR infrared filter method to achieve day and night conversion, can truly show the dynamic image of night monitoring, with a unique light suppression function, traffic light identification function, more suitable for highways, toll stations and other 24 hours a day Monitoring site.

In the special surveillance environment in winter, higher requirements are placed on surveillance cameras in terms of high definition, low illumination and specialization. Faced with the above situation, security companies need to rely on technological innovation to continuously introduce new products to meet the needs of market segmentation monitoring. As a new force in the security industry, China Digital AMPON relies on technological innovation to meet the multiple needs of the winter monitoring of the transportation industry in terms of high-definition, low illumination, color fog, traffic light identification, and strong light suppression, which will undoubtedly help users in the transportation industry. The overall monitoring quality ensures the smooth and orderly operation of the transportation network in the harsh winter conditions.