Force Sensor for Two-Wheeled Vehicle Frame
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Solution Overview
Problem
Existing force sensor devices in two-wheeled vehicles are inadequate for accurately detecting forces at inaccessible locations, which can lead to suboptimal control of brake systems and passenger safety, particularly in scenarios where the rear wheel lifting occurs during front wheel braking, risking vehicle instability.
Innovation Solution
A force sensor apparatus is integrated into the connection points between the main frame and additional frame components of a two-wheeled vehicle, utilizing a measuring pin with a magnet apparatus and magnetic field-sensitive sensor to detect changes in force, allowing for precise measurement of load distribution between the front and rear wheels, and incorporating a rocker with spring shock absorbers for stable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If force sensors are mounted at inaccessible locations to measure forces accurately, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent introduces a bearing body as an intermediary component that mediates between the frame connection point and the force sensor. The bearing body translates complex multi-directional forces at the inaccessible connection point into unidirectional compressive forces that the magnetic sensor can accurately measure, thereby enabling precise force detection without directly mounting the sensor at the complex connection location
Solution Approach 2:
The patent replaces traditional mechanical force sensors (such as strain gauges or load cells) with a magnetic field-based sensing system. A permanent magnet is positioned on the measuring pin, and its displacement under force is detected by a magnetic field sensor, eliminating the need for complex mechanical sensor installations while achieving accurate force measurement
2Device complexity
If existing force sensor devices are used, then device simplicity is maintained, but measurement precision deteriorates due to inability to detect forces at inaccessible locations
Solution Approach 1:
The patent segments the force measurement function into distinct components: the bearing body handles force transmission and direction conversion, the measuring pin with permanent magnet provides the sensing element, and the magnetic field sensor performs the actual measurement. This segmentation allows each component to be optimized independently, maintaining overall structural simplicity while achieving high measurement precision at previously inaccessible locations
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
Enables accurate load state determination and controlled brake system intervention to prevent rear wheel lifting, enhancing safety and stability by ensuring optimal engagement of both wheels during braking.
Implementation Method 1
at least one permanent magnet in the bearing body is surrounded by ferromagnetic material in such a way that the exertion of a force on the bearing body results in a distance change between the permanent magnet and the ferromagnetic material. This distance change influences the magnetic field strength in the vicinity of the bearing body, which in turn can be detected by means of a magnetic field-sensitive sensor
Data Source
AI summary
A force sensor apparatus in a two-wheeled vehicle in which a main frame that connects a front wheel to a rear wheel is attached to at least one additional frame component for accommodating persons and belongings, has a bearing body with an integrated force sensor attachable at least in a region of a connecting point between the main frame and the at least one additional frame component and sensing forces that occur between the main frame and the at least one additional frame component.