Specifications
The features and specifications of equipment given on the below are illustrative only. They are not a guarantee of performance in a particular case. For more information, please contact us.
|
Feature
|
CAT
|
RCA
|
MSRCA |
HSRCA
|
| Weight & portability | Portable, 9kg instrument, 19kg when in case. Operated by one person | Vehicle mounted or self-contained bogie |
Hi-rail or vehicle mounted |
Vehicle mounted |
| Measuring speed | Walking speed: 2-5km/h | Up to 20km/h demonstrated | Up to 45km/h demonstrated | Typically 30-140km/h; lower speed possible with reduced accuracy, particularly at long wavelengths |
| Measuring principle | Contacting transducer | Contacting transducer | Contacting transducer | Axlebox accelerometers |
| Measurement of | Single rail | Both rails simultaneously | Both rails simultaneously | Both rails simultaneously |
| Requirements regarding train or vehicle | None: portable system | Minimal wheel irregularities | Equipment is made to fit: hydraulics desirable | Minimal wheel irregularities; Electronic tachometer; Good primary suspension: minimal friction elements |
| Typical accuracy in 30-100mm wavelength range | Better than 0.001mm RMS in 30-100mm wavelength range |
Better than 0.010mm RMS in 30-100mm wavelength range |
Better than 0.003mm RMS in 30-100mm wavelength range | Better than 10dB, 5-300mm |
| Computing requirements | Laptop, 1GHz Pentium or better | Laptop or desktop, 1GHz Pentium or better | Laptop or desktop, 1GHz Pentium or better | Laptop or desktop, 1GHz Pentium or better |
| Software | Proprietary, Windows based | Proprietary, Windows based | Proprietary, Windows based | Proprietary, Windows based |
| Data collection, signal processing & display [1] | - Profile of one rail at 1mm or 2mm interval and 0.01 micron resolution - Filtered profiles [2] - RMS amplitudes in “block” or moving window [2] - Peak-to-peak amplitudes in block or moving window [2] - Percentage exceedence [4] - One-third octave band spectra |
- Profile of both rails at 2mm interval and 1 micron resolution - Filtered profiles [2] - RMS amplitudes in “block” or moving window [2] - Peak-to-peak amplitudes in block or moving window [2] - Percentage exceedence [4] |
- Profile of both rails at 2mm interval and 1 micron resolution - Filtered profiles [2] - RMS amplitudes in “block” or moving window [2] - Peak-to-peak amplitudes in block or moving window [2] - Percentage exceedence [4] |
- RMS amplitudes in “block” [3] - 1/3-Octave band spectra |
| Automatic detection discrete irregularities (e.g. welds) | Available as extra-cost option | No | No | Extra-cost option, ranked into up to 7 ranges of severity |
| Annotation of records with features of line (bridges, etc.) | No | Yes | Yes | Yes |
| Annotation of records with features of line (bridges, etc.) | - Corrugation surveys and troubleshooting - Quality Assurance for grinding - Accurate measurement of short lengths of track (2- 5km/h) - Measurements for acoustics work - Verification and calibration of other equipment: RCA, MSRCA and HSRCA |
- Corrugation surveys for metros or other relatively small railway systems - Quality assurance for grinding - Accurate measurement of moderate lengths of track |
- Corrugation surveys for larger railway systems or systems on which hi-rail vehicles are already used - Production of grinding/reprofiling programmes - Quality assurance for grinding/reprofiling |
- Measurement of complete rail systems to assess grinding requirements - Noise surveys and 'mapping' - Assessment of locations in track giving high dynamic loads (for damage to vehicle components and track) - Assessment of locations compliant with requirements of EN15610:2009, ISO EN 3095, etc. |
Notes:
- All software can export ASCII files of calculated data e.g. for post-processing with other software.
- For wavelength ranges 10-30mm, 30-100mm, 100-300mm, 300-1000mm, 1000-3000mm, 30- 300mm, 300-3000mm and 150-1500mm.
- For up to 7 non-overlapping, user-specified wavelength ranges
- The “percentage exceedence” is the percentage of the measured length over which a measurement of the profile exceeds a specified limit. The measurement can in principle be of any quantity e.g. raw or filtered profile, RMS or peak-to-peak average displacement in a moving window.
- For the HSRCA, percentage exceedences can be calculated for up to seven specified amplitude limits.