Force Sensor Device with Overlapping Hollow Sections
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Solution Overview
Problem
Existing force sensors used in wheel load scales are highly sensitive to bending and torsion, prone to damage under overload, and have expensive preparation processes due to their complex design.
Innovation Solution
A strip sensor device composed of elongated sensor mounts with overlapping hollow sections, featuring force strip sensors that are insensitive to bending and torsion, with a flexible mounting system allowing for varying sensitivity and easy assembly, and elastic edge zones for stress compensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If force sensors are designed as aluminum hollow sections with multiple quartz sensors or wire strain gauge measuring elements, then measurement precision is improved, but device complexity increases and manufacturing cost increases
Solution Approach 1:
The sensor system is divided into multiple independent hollow section sensors arranged in a grid pattern, where each hollow section contains its own measuring elements. This segmentation allows each sensor to function independently while contributing to the overall weight measurement, simplifying the design of individual components while maintaining system precision.
Solution Approach 2:
Multiple measuring elements (quartz sensors or wire strain gauges) are combined within each hollow section to measure different stress components. The signals from these multiple elements are integrated to provide comprehensive weight detection, achieving high measurement precision through the combination of multiple simple sensors rather than one complex sensor.
2Measurement precision
If force sensors are designed as aluminum hollow sections with multiple quartz sensors or wire strain gauge measuring elements, then measurement precision is improved, but ease of manufacture deteriorates
Solution Approach 1:
The sensor system is divided into multiple independent hollow section sensors arranged in a grid pattern, where each hollow section contains its own measuring elements. This segmentation allows each sensor to function independently while contributing to the overall weight measurement, simplifying the design of individual components while maintaining system precision.
Solution Approach 2:
Multiple measuring elements (quartz sensors or wire strain gauges) are combined within each hollow section to measure different stress components. The signals from these multiple elements are integrated to provide comprehensive weight detection, achieving high measurement precision through the combination of multiple simple sensors rather than one complex sensor.
3Measurement precision
If force sensors are designed as aluminum hollow sections with multiple quartz sensors or wire strain gauge measuring elements, then measurement precision is improved, but reliability deteriorates due to sensitivity to bending and torsion
Solution Approach 1:
The hollow sections are specifically designed with circular cross-sections and optimized wall thicknesses to provide uniform stiffness in all directions, making them equally resistant to bending and torsional loads. This local structural optimization ensures that each sensor element responds primarily to vertical compression forces from vehicle weights while being inherently robust against lateral bending and twisting forces.
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 solution provides a robust, cost-effective, and accurate weight detection system for vehicles, capable of withstanding overload without damage and maintaining consistent sensitivity along the direction of travel, suitable for both mobile and stationary applications.
Implementation Method 1
The hollow sections are arranged at least partially overlapping in the elongated sensor mount... One of the force strip sensors is arranged in each of the hollow sections
Data Source
AI summary
A force sensor device (200) for detecting a weight of a vehicle. The force sensor device (200) includes an elongated sensor mount (2) with a plurality of hollow sections (3) arranged at least partially overlappingly in the elongated sensor mount (2). A force strip sensor (1) is arranged in each hollow section (3).