Applications

The devices are intended for measuring the diameter of wheel rolling circle, geometric parameters of wheel flanges, tire thickness and for taking roll surface wear profile of wheel sets of railway, tube and tram vehicles.

Wheel diameter measuring gauge detail photo

Wheel diameter measuring gauge, FDK Series

This electronic gauge is designed for measuring wheel rolling circle diameter. Measurements are made directly on rolling stock without wheel set roll-out. The measurement of the diameter is performed according to the "three points" technique, without the complete wheel coverage. The gauge contains numeric display to show the value of the wheel diameter.

The wheel diameter gauge operates on the basis of the absolute linear contact encoder.

Photoelectric scanning schematic

 

It works on the principle of photoelectric scanning of special scale, connected with a measurement tip of the sensor. Radiation of a LED 1 is collimated by a lens 2 and is directed on a scale 3. The image of area of the scale is examined by CMOS array 4 and is analyzed by signal processor which calculates position of the scale.

Design

Electronic gauge contains two ball supports to place the gauge onto the roll surface, two side supports to base the gauge to the wheel edge and a measuring tip. There is a digital numeric display and control buttons on the front panel of the gauge. “Charge” connector for charging device connection is situated on the top panel of the gauge. An accumulator batteries are a source of power supply. The accumulator batteries are easy to change.

Measuring Gauge schematic

Laser wheel profilometer with mobile scanner

Laser wheel profilometer, FDKP Series

The laser profilometer is employed for measuring geometrical parameters of the wheel flange (thickness, slope, height), tire thickness and for taking full profile of the wheel roll surface. An FDRF603 laser module placed inside the profilometer casing performs linear scanning of the wheel surface being driven by a mini-stepper. A sensor placed inside the grip makes it possible to measure the tire thickness. The mobile computer connected to the profilometer performs conversion co-ordinates with respect to the wheel, calculation, display and storage of parameters and profiles (up to 1000 in number) for subsequent transmission to a wheel-set wear database management system.

For datasheet click here.