Vehicle Braking Differential Travel Sensor Using Magnetic Field Coupling
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Solution Overview
Problem
Existing differential travel sensors in braking systems require complex displacement movements and power supply lines, leading to increased costs and potential inaccuracies in measuring differential travel, which can result in malfunctioning braking systems.
Innovation Solution
A differential travel sensor with a sensor unit that remains fixed relative to the vehicle, using a predefined electrical or magnetic field that does not change with displacement, allowing for precise determination of differential travel without the need for absolute travel measurements and reducing the complexity of power supply and installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the sensor unit is attached to the driver brake force transmission component or actuator force transmission component to measure differential travel, then the measurement function is achieved, but the sensor unit must undergo complex displacement movements and require moving cable or sliding contact for power supply, increasing device complexity and cost
Solution Approach 1:
The patent introduces a magnetic field as an intermediary between the sensor unit and the moving components. The magnetic field couples the stationary sensor unit with the moving driver brake force transmission component or actuator force transmission component, enabling differential travel measurement without physical contact or moving cable connections. This resolves the contradiction by allowing measurement functionality while eliminating the need for complex power supply lines to moving parts.
Solution Approach 2:
The patent replaces the mechanical power supply system (moving cable or sliding contact) with a magnetic field-based coupling system. The sensor unit remains stationary while the magnetic field transmits information about the position and movement of the brake force transmission components, eliminating the need for mechanical connections to moving parts and reducing device complexity.
2Device complexity
If the sensor unit is fixed on the vehicle rather than attached to moving components, then power supply and electronic system connection are simplified, but the ability to measure differential travel through displacement movement is lost
Solution Approach 1:
The magnetic field serves as a mediator that connects the stationary sensor unit with the moving brake force transmission components. The sensor unit detects changes in the magnetic field caused by the movement of the components, enabling differential travel measurement without requiring the sensor unit itself to move or have complex power supply connections.
Solution Approach 2:
The patent replaces the mechanical displacement-based measurement approach with a magnetic field-based detection approach. The sensor unit remains stationary while detecting magnetic field variations that correspond to the differential travel of the brake components, maintaining measurement precision while simplifying power supply and connections.
3Measurement precision
If complex displacement movements and moving cable connections are used for the sensor unit, then differential travel measurement is possible, but costs increase and potential inaccuracies are introduced
Solution Approach 1:
The magnetic field acts as a reliable intermediary that accurately tracks the position and movement of the brake force transmission components without the mechanical wear and contact issues associated with moving cable or sliding contact systems. This improves both measurement precision and system reliability by eliminating sources of error and failure.
Solution Approach 2:
The patent replaces the mechanical measurement system with potential for inaccuracies with a magnetic field-based detection system. The stationary sensor unit detects magnetic field variations that precisely indicate differential travel, eliminating the mechanical wear, contact resistance, and connection issues that reduce reliability in traditional systems.
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
This solution enables reliable and cost-effective determination of differential travel, reducing the risk of braking system malfunctions and improving the precision of brake force regulation, thereby enhancing the reliability of the braking system.
Implementation Method 1
With the aid of a field generation component, a first electrical or magnetic field having a predefined intensity distribution is generated in a spatial axis system, which is definable/defined fixedly with respect to a first body
Implementation Method 2
a sensor unit, which is designed for the purpose of determining at least one intensity variable I of a first electrical or magnetic field having a predefined intensity distribution
Data Source
AI summary
A differential travel sensor for a braking system of a vehicle includes: a field generation component, with the aid of which a first electrical and/or magnetic field having a predefined intensity distribution is generated in a spatial axis system fixedly definable with respect to a first body which is a driver brake force transmission component or an actuator force transmission component; and a sensor unit detecting at least one intensity variable of a second electrical and/or magnetic field generated due to an interaction of the first electrical and/or magnetic field with a second body, the second body being different from the first body and being the driver brake force transmission component or the actuator force transmission component.