Integrated Pedal Simulator With Redundant Displacement Sensing
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Solution Overview
Problem
Conventional pedal simulators lack components for detecting pedal displacement and have structural limitations that hinder redundancy, which is essential for autonomous vehicle driving technology.
Innovation Solution
A pedal simulator design that integrates a component for forming pedal effort and a component for detecting pedal displacement without using external links, incorporating a sensor to detect changes in a magnetic field generated by a magnet within the pedal simulator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate stroke sensor is mounted on a pedal to detect pedal displacement, then pedal displacement detection is achieved, but structural limitations prevent redundancy and increase device complexity
Solution Approach 1:
The patent merges the pedal effort forming components (damper, piston, spring) with the pedal displacement detection function into a single integrated pedal simulator. The displacement member is coupled to the piston and moves together with it, allowing the sensor to detect pedal displacement through the displacement member's movement relative to the housing, thereby achieving both pedal effort provision and displacement detection without separate external sensors
Solution Approach 2:
The pedal simulator is designed to perform multiple functions: it forms pedal effort through the damper and spring mechanisms while simultaneously detecting pedal displacement through the integrated displacement member and sensor system. This multi-functionality eliminates the need for separate stroke sensors and enables redundancy within the same structural component
2Measurement precision
If an external sensor is connected to a pedal through a link, then pedal displacement can be detected, but the link connection creates structural limitations that hinder redundancy
Solution Approach 1:
The patent extracts the detection function from the external link connection and integrates it directly into the pedal simulator's internal structure. The displacement member is coupled to the piston inside the housing, and the sensor is disposed inside the housing to detect the displacement member's position, eliminating the need for external links and sensors mounted on the pedal
Solution Approach 2:
The displacement member acts as an intermediary between the piston movement and the sensor detection. It is coupled to the piston and moves together with it, translating the piston's movement into a form that the sensor can detect (change in magnetic field or optical position), thereby enabling internal detection without external link connections
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 effective detection of pedal displacement with redundancy, facilitating assembly and enhancing compatibility with autonomous vehicle systems.
Implementation Method 1
the displacement member may include a magnet, and the sensor may detect a change in a magnetic field according to a change in position of the displacement member
Data Source
AI summary
A pedal simulator is disclosed. The pedal simulator, which is a pedal simulator providing a pedal effort to a pedal of a vehicle, may include: a housing; a piston of which at least a portion of a front is disposed in the housing and which is connected to the pedal to move forward or rearward according to the behavior of the pedal; a displacement member connected to the piston, disposed in the housing, and configured to be displaced together with the piston; and a sensor disposed to detect the displacement of the displacement member.