Application of Hainan Shidian UWB Ranging in High-Speed Railway Stations

I. Demand Background and Pain Points

High-speed railway stations are high-density locations with significant passenger flow. To prevent passengers from illegally intruding into the track area by crossing the railway lines from the platform ends, railway authorities require the installation of anti-intrusion systems. These systems aim to promptly detect and capture illegal intrusion activities,制止违规行为, and avoid significant losses.

To achieve high accuracy and stability, the "Millimeter-wave Radar + Camera + Voice Alarm" solution is typically adopted. This can accurately identify whether there is an intrusion within a preset short-range area. If an intrusion is detected, it triggers linked actions such as alarm voice broadcasts and camera snapshots.

Although this system can accurately identify unauthorized entry into hazardous zones, it cannot distinguish the identity of the personnel triggering it. Legitimate railway maintenance staff conducting routine safety inspections will also trigger alarms. This significantly impacts passenger experience and wastes station management human resources.

II. Solution Overview

Integrate UWB ranging base station tags, specifically the WE-TG230 and card-type tag WE-T241-C, into the existing "Millimeter-wave Radar + Camera + Voice Alarm" personnel intrusion monitoring system. The ranging base station tag WE-TG230 provides two relay channels: active relay 1 and passive relay 2. Connect these two relays to the anti-intrusion central control system. The relay status can determine whether authorized personnel (typically wearing whitelisted tags) are present within the alarm zone, thereby deciding whether to deactivate the anti-intrusion alarm. The application deployment diagram is as follows:

The Hainan Shidian UWB Mutual Ranging System is built around internationally advanced UWB positioning technology. It employs a unilateral ranging algorithm to achieve adaptive, precise distance measurement between base stations and tags, with an average accuracy of up to 10cm. The base station is equipped with two relay channels. The opening/closing of these relays enables the detection of whether a tag is present within the base station's preset range. The principle of the solution is described in the following diagram:

The RS485 interface of the ranging base station tag WE-TG230 connects to an RS485-to-Network DTU, converting the RS485 communication reports from the WE-TG230 into RJ45 network reports. Using the provided reporting interaction protocol for base station tags, the monitoring center's platform software can quickly read information such as Tag ID, Base Station ID, Ranging Distance, and Tag Battery Level. Simultaneously, the platform can add or remove authorized whitelist tag IDs. The platform application software interface is shown below: