Oscillating Mechanism with Angle Sensor for Vehicle Seat Deflection
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Solution Overview
Problem
Existing measuring devices for vehicle seat deflection are inaccurate due to the elasticity of the belt material and indirect measurement methods, leading to unreliable results.
Innovation Solution
A direct measurement system using a scissor-type frame with a pivotally attached first scissor part and an angle sensor unit connected to a lever device, which moves on a curved path to detect changes in the vehicle seat's height, allowing for precise measurement of deflection, speed, and acceleration, and is integrated with a spring and damper system for real-time adjustment of seat comfort and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a belt retractor mechanism is used for measuring seat deflection, then the measurement system is simple to implement, but the measurement precision deteriorates due to belt elasticity and indirect measurement
Solution Approach 1:
The patent replaces the mechanical belt retractor measurement system with an optical angle sensor system. The angle sensor unit detects the rotation angle of the scissor frame directly, converting mechanical movement into optical/electrical signals for precise measurement, thereby eliminating the inaccuracies caused by belt elasticity.
Solution Approach 2:
The patent introduces a scissor frame as an intermediary mechanical structure between the seat and the angle sensor. This scissor frame translates the vertical deflection movement into rotational movement that the angle sensor can accurately measure, providing a reliable mechanical-to-optical conversion mechanism.
2Measurement precision
If an angle sensor unit is integrated within the fluid spring, then the measurement precision is improved through direct measurement, but the device complexity increases
Solution Approach 1:
The patent merges the angle sensor unit directly into the fluid spring assembly, utilizing the existing structural space within the fluid spring. This integration approach allows the measurement function to be combined with the suspension function, reducing overall system complexity despite the advanced sensing technology used.
Solution Approach 2:
The fluid spring structure serves dual functions: providing suspension support and housing the angle sensor unit for measurement. This multi-functionality reduces the need for separate measurement device components, thereby managing device complexity while achieving precise measurement.
3Volume of moving object
If the angle sensor unit is arranged within the fluid spring, then the installation space is reduced and protection is improved, but the ease of operation for maintenance deteriorates
Solution Approach 1:
The angle sensor unit is nested within the fluid spring assembly, utilizing the internal space of the existing suspension component. This nesting arrangement minimizes the overall installation volume while keeping the sensor protected within the fluid spring's structural envelope.
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 precise and direct measurement of vehicle seat deflection, enabling real-time adjustment of spring hardness and damping to enhance driving comfort and safety by preventing abrupt movements.
Implementation Method 1
the angle sensor unit is actuated by the lever device... a height adjustment of the vehicle seat can be measured by a change in the angle of rotation of the angle sensor unit
Implementation Method 2
the first scissor part is pivotally attached to a first end portion by means of a pivot axis on the vehicle seat base
Implementation Method 3
The vehicle seat preferably comprises a spring and/or a damper device arranged between the upper part of the vehicle seat and the lower part of the vehicle seat
Implementation Method 4
The vehicle seat preferably comprises a spring and/or a damper device arranged between the upper part of the vehicle seat and the lower part of the vehicle seat
Data Source
Figure 1
Figure 2A~2B
Figure 3
AI summary
Measuring device for a vehicle seat with a vehicle seat base and a vehicle seat top movable relative to the vehicle seat base, wherein a scissor frame with at least one first scissor part and at least one second scissor part is arranged between the vehicle seat top and the vehicle seat base, wherein the first and the second scissor part are connected to each other by means of a pivot axis and the first scissor part is pivotably attached to the vehicle seat base with a first end region by means of a pivot axis, wherein at least one angle sensor unit is attached to the first scissor part in a first section of the first scissor part and the angle sensor unit () is movably connected to the vehicle seat base () by means of a movable lever device () and wherein the angle sensor unit () can be actuated by means of the lever device () when the height of the vehicle seat top () is adjusted.