I. Requirements Analysis

With rapid socioeconomic development, the scale of transportation infrastructure continues to expand, forming a complex network. While travel has become more convenient, the intertwining of power grids and transportation systems has also increased. The familiar "three crossings" refer to sections of overhead power lines that span high-speed railways, expressways, and major transmission corridors. These overhead lines feature large spans, long routes, and traverse complex environments, making them challenging to inspect and maintain.

II. Working Principle

Overhead Line Image Video Detection Device (Triple-Span Video) enables round-the-clock video monitoring of the surrounding environment of triple-span lines, achieving real-time recording of on-site conditions during fault occurrences. Front-end high-definition cameras identify and capture video data from the line corridor, transmitting image/video data to the monitoring center via 4G/5G/WIFI/OPGW fiber networks. By analyzing and comparing video and image data sent from the field, if abnormal early warning information appears, maintenance personnel can immediately rush to the scene for corresponding emergency handling, shortening the power restoration and repair response time caused by external force damage to triple-span lines.

III. Features and Functions

1. Supports dynamic adjustment of resolution and frame rate, enabling real-time optimization and feedback based on network conditions;

2. Supports night vision functionality to meet nighttime surveillance requirements. Night vision activation can be controlled remotely and requires integration with a unified video platform.

3. Supports 24-hour continuous recording at the front end, utilizing a loop recording mechanism (whereupon storage capacity is filled, earlier recordings are automatically overwritten). Storage capacity accommodates over five days of historical footage.

4. Supports video retrieval and playback; the main station system can search for and access recordings from different time periods at the front end.

5. Supports pan-tilt control functionality, enabling movement in up, down, left, and right directions along with adjustment of step size and speed; supports zoom adjustment control for the lens.

6. Supports NTP protocol for time synchronization;

7. Supports requirements of Interface B in the enterprise standard "Power Grid Video Surveillance System and Interfaces." Supports integration with the internal network unified video platform.

IV. Technical Specifications