About the Wireless wheel load system
Althen Sensors & Controls delivered a robust, wireless, static weighing system to meet these needs. Known as the Wireless Wheel Load System, it provides precise measurements of the total weight of each tram, the axle loads, and the weight of each independent wheel. The system includes a mobile charging station with in GVB's case 12 load cells and a laptop equipped with custom weighing application software, creating a highly portable and easy-to-use solution that can be operated directly within the GVB workshop in Amsterdam.
Applications of the wireless wheel load system
Knowing the weight per wheel and axle is essential for train and tram operators, as it directly affects load distribution. An unbalanced load can lead to increased wear on wheels and rails and may cause defects or damage to the vehicle and infrastructure. The system can be used in various situations to determine the weight, such as:
- When new rolling stock enters service for the first time, the system can be used to verify the vehicle’s total weight (to confirm it meets specifications) and to ensure the load distribution is correct.
- When additional equipment is installed on the vehicle, the total weight and load distribution can be rechecked.
- Before and after major maintenance, such as a bogie overhaul, the weight and load distribution can be measured to ensure that no shift has occurred as a result of the work.
- The system can also support investigations when damage or defects are suspected to be caused by incorrect load distribution.
GVB weighs vehicles on different occasions to monitor weight and balance. With this system, measurements can be performed directly in the workshop depot on the maintenance track in Amsterdam.
Weighing process simplified
The weighing system is integrated into a mobile charging station. In the case of Amsterdam’s GVB, 12 load cells are stored in the station, which recharges them after use. A laptop runs the software that displays results per wheel, per axle, and for the total vehicle weight.
To perform a measurement, the tram is first lifted using jacks and the 12 load cells are positioned on the rails. Before the tram is lowered onto the load cells, the system is zeroed to ensure accurate readings. The tram is then slowly lowered until it rests fully on all 12 load cells.
The measurement data is transmitted wirelessly to the laptop. Within seconds, the software displays the results.
Immediate detection of imbalance
To commission the system, Althen was present at the GVB workshop to demonstrate its operation and ensure safe use. GVB prepared its own work instructions, which were reviewed and verified by Althen where required.
During the initial measurement at the GVB workshop, the system detected an imbalance of more than 200 kilograms between wheels 1 & 2 and 3 & 4. This required further investigation by the technical specialists.
The total vehicle weight, however, was fully within specification at 36 tonnes.
Other railway measurement solutions
Althen Sensors & Controls also offers a comprehensive range of other railway measurement systems designed to enhance safety, performance, and operational efficiency for rail operators.
We provide systems for Weighing in Motion (AWIM), which enables precise measurements of axle loads, wheel weights, and overall vehicle weight while trains are in operation. These dynamic solutions include features such as wheel flat detection, overload monitoring, and derailment risk assessment. This gives operators real-time insight into potential maintenance issues before they develop into critical failures.
Customer-focused solutions in public transportation
In a short time, Althen’s Wireless Wheel Load System has become a valuable asset for GVB, enabling accurate, real-time weight measurements that support maintenance, safety, and operational efficiency. With Althen’s expertise, GVB now has a versatile solution for static weighing in the depot and the potential for future dynamic monitoring.
This project reflects our commitment to innovative, customer-focused measurement solutions for public transportation. Contact our specialists to discuss the right railway measurement system for your application.
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Do you have questions about this project or the related products? Please get in touch with us.