What is BS EN 15654‑1-On-track measurement sites vehicles in service about?
BS EN 15654 discusses vertical forces on wheels and wheelsets in railways applications. BS EN 15654‑1 is an international standard that provides on-track measurement sites for vehicles in service.
BS EN 15654‑1 is the first part of a multi-part series that is restricted to the measurement of vertical wheel forces and calculation of derived quantities on vehicles in service. Measurements of a train in motion are used to estimate the static forces.
Derived quantities under BS EN 15654‑1 can be:
- Ax loads
- Side to sideload differences of a wheelset, bogie, vehicle
- The overall mass of vehicle or train set
- Mean axle load of a vehicle or train set
BS EN 15654‑1 defines accuracy classes for measurements to be made at any speed greater than 5 km/h within the calibrated range, which may be up to line speed.
The aim of BS EN 15654‑1 is to obtain measurement results that give representative values for the distribution of vertical wheel forces of a running vehicle, which under ideal conditions will be like those that can be obtained from a standing vehicle.
Note 1: BS EN 15654‑1 is not concerned with the evaluation of dynamic wheel force or derived quantities, wheel condition (shape, profile, flats), lateral wheel force, and combination of lateral and vertical wheel forces.
Note 2: BS EN 15654‑1 does not impose any restrictions on the types of vehicles that can be monitored, or on which networks or lines the measuring system can be installed.
Who is BS EN 15654‑1 -On-track measurement sites for vehicles in service for railways for?
BS EN 15654‑1 on on-track measurement sites for vehicles in service for railways is useful for:
- Manufactures of railway wheels and wheelsets
- Test centers for railway wheels and wheelsets
- Regulatory authorities
Why should you use BS EN 15654‑1 -On-track measurement sites for vehicles in service for railways?
Static vertical wheel force is a representation of the vertical part of the static wheel force vector obtained from the dynamic measurement process of a vehicle in motion. Axle load is a sum of the static vertical wheel forces exerted on the track through a wheelset or a pair of independent wheels divided by the acceleration of gravity.
BS EN 15654‑1 lays down minimum technical requirements and the metrological characteristics of a system for measuring and evaluating a range of vehicle loading parameters.
BS EN 15654‑1 also defines accuracy classes for the parameters measured and the procedure for verifying the calibration for vertical forces on wheels and wheelsets for railways.
BS EN 15654‑1 assist in standardizing the quality of railway wheels and wheelsets.
Also measuring systems complying with BS EN 15654‑1 assist to enhance safety in the railway sector.