options.
RAIL PROFILE MEASUREMENT
3D cameras using triangular principle are applied for non-contact continuous scanning of the rail profile in regular step 0.25m.
The rail head wear is calculated and displayed in real time as well as the shape of the rail head.
The parameter of equivalent conicity is available
in data post-processing.
Both rails or only one rail can be measured simultaneously depending on chosen configuration.
EXTERNAL DIFFERENTIAL GNSS RECEIVER
This option allows to use high-precision satellite navigation receiver with diff erential RTK corrections.
System uses the GPS/GLONASS/
Galileo/BeiDou satellites.
It is online connected to server providing diff erential corrections via Mobile Broadband.
Precise location is transferred to KrabDroid computer for logging and further processing.
KrabCamera and IP Camera are an additional systems for Krab measuring trolleys.
It allows to take pictures of the track, rails, sleepers or any other objects around measured railway track.
Pictures are synchronized with Km position and taken in optional step (typically
1 to 10 m).
KrabCamera application runs on a conventional Android smartphone and saves the images to its own memory, while IP Camera stores the images into the measuring smartphone memory.
IP camera is attached to an extension arm and can be folded after the measurement, so the trolley can be placed in a transportation box.
The 360° Camera allows to capture the full 360° view around the trolley.
After the measurement is finished, data from KrabCamera or IP Camera and from KrabDroid measuring software are downloaded to PC.
They can be processed by Krab 11 evaluation software.
IMU
Innertial Measuring Unit
Option for measuring in D2 waveband
Family of Krab trolleys can be additionally equiped with an IMU.
IMU is designed for continuous and real-time innertial measurement of track geometry quantities Alignment, Top and Cant.
The IMU sensors consists of the gyroscopes and acceleromters.
Therefore all directions of movement are recorded and used for calculations.
The output data can be used for calculations of Real geometry, Chord geometry and D1, D2 or even D3 vawebands.
DIMETIX
Option serves for operational checking of position
DIMETIX option serves for operational checking of position.
It uses two sensors - laser distance meter + incremental rotary sensor.
Using these two sensors the 2-dimensional position of the objects around the track can be detected.
Laser distance meter is positioned manually.
Example of corrugation evaluation in Gekon 11 software
Additional Corrugation Measuring unit
Krab S-Light trolley can be additionally equipped with a corrugation measuring unit.
This gives the Krab S-Ligth trolley wide range of measured quantities.
The corrugation unit is placed in a box, which is attached to a measuring triangle arm.
Data gained with the corrugation measurement unit can be evaluated in Gekon 11 software.
LPS Tower
Track Clearance Profile Scanner
LPS is a track inspection system using two rotating lasers to scan the full clearance envelope, including tunnels, platforms, OH wires, masts, vegetation, and nearby objects.
This device is a litte tower mounted on the stable trolley.
The system provides enough data to reconstruct a complete 3D track model.
