I. Project Overview The project adopts the standard six-lane section form, with a subgrade width of 33.5m, a design speed of 100km/h and a total length of 71.281158km. There are 7 interchanges across the board (including 3 general service interchanges, 3 hubs interoperating, 1 interoperability transformation), 2 service areas (Yanghe Service Area, Xuanhua South Service Area), and 1 maintenance area. Limited management station 1. There are 985 meters/3 tunnels, 1 large bridge (1446 meters), 7875.135 meters/24 bridges, and 738.56 meters/6 middle bridges (large and medium bridges, and the length of the tunnel accounts for 13.44% of the total route length. The above statistics do not include separation, Interchange area bridge). There are 14 harbor-style parking zones across the entire area (2 landmarks and 3 landmarks).
The project belongs to the second area of ​​Hebei Province and adopts a four-level management system of the provincial center-zone center-sub-center-station, in which one road monitoring, communication, and charging branch center is the communications command and dispatching center of Tongtai Expressway; the toll station 3 Department: Shacheng West Toll Station, Zhuolu North Toll Station, Xiahuayuan West Toll Station.
Second, the system composition
1. The field monitoring system consists of a monitoring system and a monitoring field equipment distribution system. The monitoring system includes: computer network subsystems, closed-circuit television monitoring subsystems, information collection subsystems, information distribution subsystems, data transmission subsystems, and software subsystems. system. Monitoring field equipment distribution system includes: field equipment distribution box, low voltage power cable engineering.
2. Charging System This project adopts a fully digital compressed video transmission system scheme. All of the outfield monitoring images, toll plazas, and toll booth images are digitized on the camera side. After the compression is completed in the digital compression video transmission system according to the H.264 video compression algorithm, the access is achieved through the use of a fiber group ring network or chained mode. Stations, through the communication system access network channel, to achieve image transmission, management and comprehensive application by IP.
All-optical video transmission systems mainly have the following applications:
1: Monitoring Center:
Video decoding to video wall
2: Toll stations, toll booths:
Video coding to communication system
Description (1) Image access For the remote camera video image on the main line of the road, considering that the number of videos is relatively small and relatively decentralized, this solution uses the MMoIP-R06 remote integrated access device for transmission. The road main line monitoring camera video signal and PTZ control signal directly access the BMO video interface and asynchronous data control port of the MMOIP-R06 device, and is encoded in the field through the MMOIP-R06 using the ITU-T H.264 protocol into a digital signal. The self-healing ring network composed of single-mode fibers is transmitted to the tri-layer Ethernet switch at the toll station.
(2) Image output After all the external field and toll gate images are encoded and compressed by the MMoIP-R06 remote integrated access device, the MMOIP-R06 central office integrated access device is uploaded to the corresponding tunnel management station in a fiber ring network or chain mode. , Through the Central Office output display and storage, and then through the transmission channel provided by the communications system to the upper area monitoring center.
(3) Video storage All images of this road section are stored centrally in Tongtai Subcenter