Product Overview
The RHD916A railway automatic vehicle identification (AEI) system is a dual-standard solution compliant with both TB/T3070-2002 (China Railway standard) and ISO 10374 (AAR) international standards. It reads TRANSCORE, SRT, XC, and HTK type AAR-encoded tags as well as next-generation FM0 encoded vehicle and locomotive tags. The system is built on a discrete RF architecture (PLL + IQ quadrature demodulation + FPGA protocol engine + MCU controller), with both hardware and software designed in-house.
System Composition: Wayside equipment (AEI host + wheel sensors + ground antenna + axle counting & vehicle detection unit + cabling & protection) + On-board tags (20-bit electronic tags). Designed to meet railway engineering requirements.
Key Features
- Universal Tag Compatibility: Correctly reads TRANSCORE, SRT, XC, and HTK type traditional AAR-encoded tags as well as FM0-encoded vehicle and locomotive tags. Supports China Railway FM0, MID FM0, and TW/YW/WB/AG/HK user-defined tag protocols.
- Discrete Architecture: RF front-end based on independent PLL + IQ quadrature demodulation; baseband implemented with FPGA programmable protocol engine. Non-standard protocols can be supported via firmware upgrades.
- Auto Axle Counting & Vehicle Detection: Works with wheel sensors (magnetic) to automatically count axles, determine locomotive and vehicle counts, locate tags, and measure passing speed.
- Multi-Interface Communication: RS232 (up to 100m), RS485 (up to 1000m), and RJ45 connectivity options for flexible system integration.
- Industrial-Grade Reliability: -30°C to +75°C operating temperature range. N-type RF connectors are more robust than SMA. Real-time self-diagnostics for RF channels, decoding channels, antenna, and wheel sensor connections.
- In-House Design: From discrete components to MCU firmware to FPGA protocol stack — all independently developed. Encoding formats can be upgraded to stay aligned with China Railway standards.
- Companion Tag RHD-916TAG: Passive design, 10-year lifespan, 0~200KM/H under standard protocol (up to 400KM/H with proprietary protocol). View Details.
Technical Specifications (Standards: TB/T3070-2002 + ISO 10374)
| Applicable Standards | TB/T3070-2002 + ISO 10374 (AAR) |
|---|---|
| Operating Frequency | 910.10 — 924.375 MHz |
| Output Power | 10~34 dBm |
| Read Range | 0 — 6 m |
| Vehicle Speed | 0 — 200 KM/H |
| Operating Temperature | -30°C — +75°C |
| Power Supply | 12V DC / 3A |
| Communication Interfaces | RS232 (≤100m) / RS485 (≤1000m) / RJ45 |
| Antenna Ports | 1 port (standard) / 2 ports optional, N-type RF connector (50Ω) |
| RF Cable Length | ≤ 30m (≤ 45m when vehicle speed ≤ 30KM/H) |
| Dimensions | 240 × 180 × 27 mm |
| Weight | 2 KG (gross) |
| Tag Formats | TRANSCORE / SRT / XC / HTK type AAR encoding + FM0 encoding (CR FM0 + MID FM0) |
| User Tag Protocols | TW / YW / WB / AG / HK (configurable) |
| Default Baud Rate | 57600 (N-8-1) |
| Default Carrier Frequency | 922.375 MHz |
| Architecture | Discrete PLL + IQ Quadrature Demodulation + FPGA Protocol Engine + MCU Controller |
Panel & Interface Description
- NET: RJ45 network interface
- AUX Port: DB25 multi-function connector (pins 24/25: RS485 interface)
- COM: RS232 interface (DB9 female, for host PC connection)
- Power: 12V DC power adapter input
- RF Port: N-type RF connector (dual-antenna version has two N-type connectors)
- Indicators: SYS (system/antenna status), Tx (PA active), Rx (valid tag received)
Applications
- ATIS: Railway Intelligent Transportation Dispatch & Management System
- TADS: Trackside Acoustic Detection System (bearing fault early warning)
- TFDS: Trouble of Moving Freight Car Detection System (dynamic image inspection)
- THDS: Trace Hotbox Detection System (infrared axle temperature monitoring)
- TPDS: Truck Performance Detection System (wayside safety monitoring)
- Railway Freight Yards / Power / Metallurgy / Coal Mines / Ports / Petrochemical — dynamic electronic weighbridge applications
Ordering Information
| Model | Description |
|---|---|
| RHD916A-1P | Railway Automatic Equipment Identification (AEI) system,1 antenna port (standard) |
| RHD916A-2P | Railway Automatic Equipment Identification (AEI) system,2 antenna ports |
| RHD-916TAG | Railway electronic tag, passive, 10-year lifespan, 0~200KM/H standard (up to 400KM/H proprietary). View Details |
For orders and inquiries, please contact:
Tel: +86-755-81718696
Email: service@rhid.cn
Web: www.rhid.cn