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ODS-Caltronic has for more than a decade manufactured and supplied automatic

Wheel Tread Defects Monitoring &

Detection Systems (WMS).

Marketing, Production, and Service Rights for this system have recently been handed over to Hans Erik Misser ApS.

                                                            

Wheel Monitoring reduces:

 

·   Wheel maintenance costs

·   Vehicle & track down-time

·   Wheel inspection costs

·   Track & component damage

·   Ground transmitted vibration

·   Environmental noise impact

 

 

Wheel Monitoring Pays Off

The need for early warning and detection of irregularities on running wheels such as flats, corrugation and out-of-round has dramatically increased with the application of new tread materials, higher speed and an increased public awareness of noise and vibration abatement.

Continuous wheel monitoring not only complies with such demands but also offers considerable savings in terms of more cost -effective wheel maintenance procedures and reduction of wear and damage on rails and car components

Environment

The WMS as a whole and the rail mounted sensors and assemblies in particular have been designed to operate reliably under the often extreme environmental track conditions such as very wide temperature range, mechanical shocks, occasional flooding, high electromagnetic interference, rodents, grease, dirt, etc.

An accelerometer requires virtually no calibration or maintenance. It has no delicate moving parts, it covers a very wide speed range and temperature range and no temperature drift compensation circuits are needed.

Different types of sensor mountings are available. Mountings do not interfere with ballast and sleepers.

All assemblies of the WMS have passed severe electrical and mechanical vibration and shock tests according to relevant international test standards

Easy Upgrading

The series of WMS offers a modular design and is readily upgraded by the user himself e.g. from a TG.07 to a TG.14 or TG.21. The signal processing software and system software are identical for all three versions, only additional modular hardware is required for adding more channels.

Unattended Operation

The WMS track-site equipment has been designed for maximum reliability and ease of maintenance. Data are transferred continuously and automatically to the OCC (Operating Control Center). All user-defined functions and set -ups are controlled from the OCC terminal.  All user-defined functions and setups are controlled from the OCC terminal.  An error log is automatically sent to the OCC and a trouble-shooting programme allows remote diagnosis of system faults.

Main Wheel Parameters

·        Wheel Flats

·        Out-Of-Round

·        Kurtoisis

·        Corrugation

·        Impact signal values

Vehicle & Wheel identification

Identification may take place an the basis of time stamps or fully automatically by connecting an AVl system to the WMS.  The AVl (Automatic Vehicle Identification) system is an option.

Data Transfer & Communication

The WMS connects with the remote OCC via a leased public telephone line and a serial Modem connection or LAN connection

Selecting the Installation Site

 

Location

The main track where most cars run, provides the optimum cost/benefit ratio for the system. The track must be straight with welded joints and the distance to nearby switches and crossings should preferably be at least 50 metres.

 

System Configuration

The accuracy increases with the number of full wheel revolutions measured during a train passage. The TG.07 measures at least one full revolution and the TG.21 covers 4 full revolutions during one passage. TG.21 is required for OOR (Out-Of-Round) detection. Other factors may also influence  the proper choice of system configuration.

Passage Speed ODS-Caltronic should be consulted in each case as the ideal speed range depends on traffic and site conditions.

Track-side Cabinet

 

 

The IP65 stainless steel cabinet is configured                according to WMS version. The picture shows a fully configured 42 channel TG.21 system.

 

 

 

 

 

FFT Analysis

The WMS uses an advanced FFT algorithm to analyse and calculate various wheel parameters.

User-Software with Database

A standard PC is recommended at the OCC as a dedicated WMS communication terminal on which the ODS-Caltronic user software is installed. All WMS functions are accessed and monitored from the user software and fault diagnosis software


· Hans Erik Misser ApS ·
· Office: Grønningen 56, 4220 Korsør, Denmark ·
· Phone +45 40 74 56 41 · Fax +45 58 37 16 04 ·
· E-mail: hem@misser.com · Web: www.misser.com ·