Dynamic Load Weighing via Remote Sensor Extraction
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Solution Overview
Problem
Existing methods for weighing loads in motion, such as those lifted and swung by crane arms, are either inaccurate or require excessive maintenance due to the proximity of electronic components to the load, leading to inefficiencies and increased effort in loading and transportation.
Innovation Solution
A system comprising a rigid member with force and motion measuring means, connected to a control unit capable of executing logic algorithms, which compensates for motion parameters to accurately determine the weight of a load in motion, with components mounted remotely to minimize interference and improve reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If electronic components are mounted close to the load for dynamic weighing, then weighing capability is achieved, but reliability deteriorates due to exposure to harsh environmental conditions
Solution Approach 1:
The control unit and electronic components are extracted from the proximity of the load and mounted remotely in a protected location. The patent specifically states that the control unit is mounted 'remotely from the load' to protect it from harsh environmental conditions while maintaining the ability to perform dynamic weighing through wireless or wired communication with the load cell.
2Measurement precision
If static scales are used to weigh loads, then measurement is possible, but productivity deteriorates due to required vehicle empty and loaded measurements
Solution Approach 1:
The system performs preliminary action by continuously monitoring and measuring the load weight during the loading process itself, rather than requiring separate pre-loading and post-loading measurements. The load cell provides real-time weight data as the load is being lifted, eliminating the need for separate empty and loaded vehicle measurements.
Solution Approach 2:
The patent replaces the mechanical static scale system with a dynamic weighing system using a load cell and control unit that can measure weight during motion. This substitution allows weighing to occur during the loading operation itself rather than requiring stationary scale measurements.
3Measurement precision
If existing dynamic weighing apparatus is used, then weighing in motion is achieved, but maintenance effort increases due to component proximity to load
Solution Approach 1:
The control unit is extracted from the load proximity area and mounted remotely, reducing exposure to environmental factors that cause wear and failure. This extraction directly addresses the maintenance issue by placing sensitive electronic components in a more favorable environment while retaining dynamic weighing capability.
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
The system provides high accuracy in weighing loads in motion, reducing maintenance needs and operational effort, with accuracy levels of less than 1% in dynamic conditions and 0.2% in static conditions, while being easily retrofittable to existing applications.
Implementation Method 1
A first measuring means is attached to the rigid member in a vertical and axial alignment with such load for measuring a force exerted by such load onto the rigid member
Implementation Method 2
an accelerometer to compensate for load motion and a controller which outputs a weight of the load in response to such measured force and motion compensation
Data Source
AI summary
The apparatus for weighing a load in motion includes a rigid member, a plurality of strain gages mounted within the rigid member and forming a Wheatstone bridge network for measuring a force exerted by such load onto the rigid member and an accelerometer mounted within the rigid member for measuring gravitational acceleration of the load. A controller mounted in remote location compensates the measured force according to a measurement from the accelerometer and according to a predetermined algorithm to determine the actual weight of the load. Strain gages and accelerometer are connected to the controller by way of a wiring connection. The apparatus can be easily retrofitted into existing applications, particularly for loading scrap metal by way of a crane.