Bogie Horizontal Arm Load Cell Weighing for Moving Transport Vehicles
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Solution Overview
Problem
Existing methods for weighing transport vehicles, such as measuring platform support points or wheel suspension trunnions, are inaccurate and cumbersome, as they rely on the position of the load's center of gravity and require the vehicle to be stationary, which can lead to damage and slow down operations.
Innovation Solution
Measuring vertical loads on the horizontal arm of the bogie structure using sensors, treating the arm as a single measurement point, and using a calculating unit to determine weight, allowing for weighing during vehicle movement and eliminating the impact of the load's position and wheel orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If weighing is carried out by driving the transport vehicle to an on-site weighing station, then the vehicle can be weighed, but the operation becomes slower and more cumbersome
Solution Approach 1:
The weighing system is integrated into the transport vehicle itself, making the vehicle capable of both transportation and self-weighing functions. The load cells are built into the wheel suspension, allowing the vehicle to weigh its own payload without needing external weighing stations, thus maintaining high operational speed while enabling accurate weight measurement.
2Measurement precision
If the platform is lifted to rest on lift cylinders for weighing, then weight can be measured, but the vehicle body is subjected to heavy loads that may damage it
Solution Approach 1:
The weighing function is extracted from the platform lifting mechanism and implemented separately through load cells integrated into the wheel suspension system. This allows weight measurement to occur during normal vehicle operation without requiring the platform to be lifted, thereby avoiding the harmful heavy loads that would be imposed on the vehicle body.
3Productivity
If weight measurement is based on platform support points, then weighing can be performed, but the position of the gravity centre of the charge clearly affects the accuracy of the measurement results
Solution Approach 1:
The weighing system is segmented into multiple independent load cells positioned at different locations on the wheel suspension. By distributing the measurement points across the suspension system rather than concentrating them at platform support points, the system eliminates the influence of load center position on measurement accuracy, as each load cell independently measures the force at its specific location.
4Productivity
If weighing is based on measuring load exerted on wheel suspension trunnions, then payload can be determined, but the measurement results depend on the position in which the wheels have been turned
Solution Approach 1:
The load cells are strategically positioned at specific locations on the wheel suspension where they measure vertical forces independently of wheel orientation. By placing sensors at these optimized locations rather than at trunnion points, the system achieves local measurement quality that is insensitive to wheel turning position, thereby maintaining accurate weight measurement regardless of steering angle.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method provides accurate and rapid weight measurement independent of the load's position and wheel orientation, enabling continuous operation without damaging the vehicle, as it filters out dynamic inaccuracies and allows weighing while the vehicle is in motion.
Implementation Method 1
measuring vertical loads exerted on the wheel suspension, at least at three measurement points, each of which being provided with at least one sensor
Data Source
AI summary
A method for weighing a payload of a transport vehicle, a transport vehicle and a bogie structure. Vertical loads exerted on wheel suspension of the transport vehicle are measured with sensors and the measurement data is conveyed to a calculating unit of weighing. Further, on a side surface of a horizontal arm belonging to the bogie structure there is arranged a sensor for measuring the vertical load exerted on the horizontal arm.