Application of ORing switch in 5.8GHz free-flow marking point lane system of expressway
chrispeng [ad_1]
project description
After years of hard work, Guangdong Province’s expressway network toll collection formally implemented “One Network” on June 29, 2014. “One network” of highway network toll collection in Guangdong Province refers to the adoption of a combined toll collection technology compatible with electronic non-stop toll collection (ETC) and manual semi-automatic toll collection. All highways in the province are included in a unified closed toll collection system. The ambiguity path recognition technology implements “unified toll collection and system accounting” for each toll road management unit to achieve the high-standard operation requirements of “precise toll collection and precise division”.
A company developed a set of “5.8G DSRC Free Flow Marking Point Lane System” for this purpose. The system adopts a two-tier architecture, that is, the front-end identification point system is connected with the management system of the road section center to complete the data interaction between the two to realize the identification flow convergence and front-end monitoring and management functions; in addition, the system uses a single-row gantry and The layout scheme of dual ordinary antennas, combined with the electronic tag transaction processing control method of two-stage/continuous collaborative processing, solves the problem of path identification processing of ETC vehicles in the free flow state.
system requirement
Real-time transmission: can be uploaded to the road toll center system in real time
High-speed communication: the main line HD bayonet, RFID, ETC identification points, etc. need to be connected to the communication network
Strong stability: the product supports 24-hour uninterrupted and trouble-free operation, and supports wide temperature
Easy to maintain: support remote troubleshooting, small size
Design
The ETC marking point system is composed of RSU, high-definition network cameras, industrial control machines, lane controllers, display terminals, vehicle detectors, detection coils, marking point software and auxiliary facilities, etc., which are set up where necessary in the road network. In the choice of communication mode, you can choose: 1) Wired transmission. Connect to the communication transmission channel of the field equipment nearby, or lay the optical cable to the nearby toll station, service area and other communication room; 2) Through the wireless transmission method (GPRS/CDM).
ORing provides high-speed industrial Ethernet switch IGS-1080A in this system. IGS-1080A is an ultra-thin gigabit industrial Ethernet switch that provides 8 10/100/1000Base-T(X) electrical ports. The abundant port configuration can connect the outfield identification unit, high-definition network camera, high-definition bayonet all-in-one machine and ETC identification point along the road to the road section toll center system. In addition, the system can realize the monitoring and abnormal alarm of the equipment, software and communication status of the outside field equipment, software and communication of the marking point according to the equipment status information uploaded by the ETC marking point marking processing system.
IGS-1080A supports redundant power input, relay fault output alarm system, -40~70 ℃ wide temperature, which can ensure the stable operation of the product in the environment, and also ensure that the system will not lose data under abnormal conditions such as network and power distribution. So as to ensure the integrity of the data. The IGS-1080A series is compact, measuring only 26 (W) x 94.9 (D) x 144.3 (H) mm. It supports rail installation, and can also be effectively installed in existing cabinets without taking up too much space. Very good price/performance ratio.
At present, this “5.8G DSRC Free Flow Marking Point Lane System” has been applied to Guangdong Shuiguan Expressway, Yanjiang Expressway, Dongguan-Shenzhen Expressway, Changhu Expressway, Hui-Dongguan Expressway, Guanghe Expressway, etc. The ORing products have been running well so far.
System architecture diagram
Technical advantages
The switch is small in size, easy to install, and cost-effective
Full Gigabit communication network, supporting big data transmission such as video
Adopt industrial grade design, support -40~70 ℃ wide temperature
MTBF up to 875,918 hours (close to 100 years), low failure rate
[ad_2]
