Integrated Service Fiber Optic Transmission Equipment for Road Checkpoint Vehicle Monitoring Systems
Currently, many factories and industrial parks manage entry and exit registration for freight vehicles, including photo archiving of the vehicle front, rear, cargo compartment, and panoramic views, vehicle weighing via truck scales, and in some cases, card issuance at the gate for all-in-one card management. License plates and driver information are captured and recognized via photos, and conversations between gate personnel and drivers are recorded in real time into the system.
Some cameras currently offer automatic capture, recognition, and recording functions, but for such multi-camera systems, some have disadvantages such as high cost and insufficient capacity.
These systems are characterized by manned operation, slow vehicle speeds, adequate lighting, one camera per lane, and a large number of lane cameras. Therefore, no fill light is required, no multi-lane HD cameras are needed, and low latency in image transmission is not required. We adopt a solution with centralized data processing and centralized storage, transmitting all voice, data, and image data to a data processing center with better机房 conditions. Due to the relatively large data volume, 100M or even 1000M fiber optic communication should be adopted.
Lane equipment configuration: 1. Truck scale electronic scale (RS232, RS485 interfaces),
Infrared beam trigger (RS232, RS485 interfaces), used to trigger coordinated capture by three cameras.
High-speed document scanner, used to scan and recognize driver's licenses, vehicle licenses, delivery orders, QR codes, etc. Connected to the computer via USB port.
Emergency intercom system, voice communication equipment, used for duty personnel emergency button calls, service quality supervision, voice recording, etc.
Surveillance cameras. To clearly recognize license plates, 2-megapixel to 3-megapixel cameras should be used.
LED guidance display board, used to display prompt information for drivers and auxiliary security personnel, RS485 interface.
Barrier gate control system, used to control lane barriers, RS485 interface.
Lighting control system, automatically controls lighting to save energy, RS485 interface.
Solution 1: IDM NTD421 Dual Physically Isolated Ethernet Solution
The figure assumes all serial devices use the RS485 interface. If the RS232 interface is used, an RS232/RS485 converter can be adopted.
All trigger and photo capture functions are processed and controlled by the server, or can be controlled by the local computer.
The IDM NTD421 provides one RS485 channel, which is converted to an Ethernet interface at the central end through the serial server module on the G3CP for connection to the computer. Individual serial terminals can be distinguished via the RS485 bus protocol.
Two voice channels are connected to the central end through the audio interfaces (which can be telephone ports or pure audio ports) on the IDM NTD421.
The IDM NTD421 provides 4 Ethernet interfaces, of which ports 1-3 share 100M bandwidth, and port 4 can exclusively use 100M bandwidth, suitable for applications requiring two groups of physically isolated Ethernet.
Solution 2: IDM POE-M08+ Dual Optical Port Gigabit Switch Mode
The IDM POE-M08+ Gigabit Optical Port Ethernet Switch can provide up to 8 Ethernet switch ports with POE power output, and has 3 Gigabit optical port directions, enabling a star-type Ethernet network.
The IDM POE-M08+ can be configured with 4 serial server modules, providing RS232 serial to Ethernet conversion, well suited for surveillance site applications.
The IDM POE-M08+ can also be configured with 2 telephone gateway interfaces, providing IP access for telephone or voice, well suited for offices and manned remote sites.
The IDM POE-M08+ supports remote power feeding, with a maximum single-port power supply capacity of 15W.
The IDM POE-M08+ is a combination of up to 3 Gigabit media converters + an 8-port 100M Ethernet switch with 3 Gigabit uplink ports + POE remote power feeding module + 4-port serial server (optional) + 2-port VoIP telephone gateway (optional). It is a highly integrated Ethernet remote access device that eliminates interconnections between different devices and multiple power modules. It is an ideal device for remote IP access.
In the figure above, traffic is aggregated through the 10GESW all-fiber access Ethernet switch on the G3CP. This module provides 10 Gigabit Ethernet optical ports and can connect up to 10 remote devices.
The IDM G3CP can also accommodate a SIP protocol softswitch system, providing fixed telephone access (32-channel concurrent capacity) and registration and service for remote softphones. If connected to a dispatch console, it supports telephone dispatch functions.
In this solution, if multiple physically isolated Ethernet networks are required, multiple media converters are used, with additional fiber leased or WDM technology adopted.
- System Function Description
Local lane processing: scanning and recognition of driver's licenses, vehicle licenses, and delivery (pickup) orders are handled at the lane guard booth. Lane lighting control and barrier gate control are processed locally. Weighing data and vehicle guidance information are managed centrally through the central server.
Multimedia server functions: image storage, retrieval, license plate recognition, etc. Due to the large data storage volume, a dedicated server is generally used.
Database server functions: all vehicle data is stored on this server. Various calculation results are published to each lane in real time, indicating vehicle weight, loaded cargo content, etc., and prompting lane personnel to check corresponding procedures. When time, loading content, load weight, or driver information is incorrect, the system automatically locks the barrier gate.
Conversations between lane duty personnel and drivers, and conversations with the emergency dispatch center, are all transmitted to the central end for recording and storage. When duty personnel press the intercom button, they can speak with dispatch center personnel. The dispatch center can also monitor the service quality of lane duty personnel at any time.
This solution is suitable for gate management and loading management at large freight yards, ports, factories, etc.