Introduction
LAX2000 E-EMU is a microcontroller-based system designed specifically for Electric Multiple Units (EMU). The system monitors critical locomotive parameters with high reliability and accuracy. It displays data in the locomotive and triggers audio-visual alarms when parameters deviate from specified limits, prompting immediate corrective action. The recorded data is vital for post-incident analysis and monitoring the locomotive driver’s performance.
The LAX2000 E-EMU is a speed and energy recorder unit with a memory capacity of 8 hours of 1-second interval data and 45 days of 20-second interval data, stored in a circular FIFO format on a PCMCIA card. The data can be downloaded through an RS-232 serial port from the memory reader unit.
System Overview
The system operates as follows:
- Speed Sensor Input: The system uses a signal generated from a speed sensor mounted on the axle to calculate all parameters.
- Microcontroller-based System: The microcontroller computes and records speed, distance, and energy parameters continuously to the inbuilt memory and the plugged-in PCMCIA memory card.
- Time Dimension: Time is provided by an onboard Real-Time Clock (RTC).
- Data Display and Input: The system includes an LCD display and an alphanumeric keypad for entering driver and locomotive parameters.
Alerts: Warning LEDs and audible alarms alert the driver when parameters deviate from their set limits.
Salient Features
| Feature | Details |
|---|---|
| Microcontroller-based system | Ensures high reliability and accuracy in parameter calculations and recording. |
| Data Memory | 8 hours of 1-second interval data and 45 days of 20-second interval data stored on PCMCIA card in FIFO format. |
| Data Download | RS-232 serial port for downloading data from memory to a PC. |
| Driver Alerts | Warning LEDs and audible alarms for parameter deviations. |
| Driver Interface | LCD display and alphanumeric keypad for entering locomotive and driver parameters. |
| Optional Outputs | Open-collector outputs for speed and distance parameters, programmable through keypad. |
Technical specification
| Parameter | Details |
|---|---|
| Power Supply | Powered by the locomotive’s electrical system. |
| Data Storage | 8 hours of 1-second interval data, 45 days of 20-second interval data on a PCMCIA card (FIFO format). |
| Data Download | RS-232 serial port for downloading recorded data. |
| Speed Sensor Input | Signal from axle-mounted speed sensor for parameter calculations. |
| Driver Input | LCD display and alphanumeric keypad for entering parameters. |
| Alert System | Warning LEDs and audible alarms for parameter deviations. |
| Optional Features | Open-collector outputs for speed and distance parameters. |
