Electromechanical Brake Wear Detection via Spindle Angle Feedback
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Solution Overview
Problem
Conventional electromechanical brake systems fail to detect and notify drivers of brake pad wear in real time, potentially leading to accidents due to unmonitored wear.
Innovation Solution
An electromechanical brake system with a control unit that calculates the first and second rotation angles of a spindle during brake apply and release modes, respectively, and notifies the driver of brake pad wear by controlling a notification device when a difference between these angles is detected, allowing for adjustment of the piston position to compensate for wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electromechanical brake systems are used without wear detection, then the brake system structure remains simple, but the reliability of the braking system deteriorates due to undetected brake pad wear
Solution Approach 1:
The patent implements a feedback mechanism by measuring the spindle rotation angle during brake application and release, calculating the difference to detect brake pad wear, and providing real-time feedback to the control unit which then notifies the driver through a display device. This closed-loop feedback system enables wear detection without requiring complex additional hardware.
Solution Approach 2:
The brake system performs self-diagnosis by utilizing its existing motor and spindle rotation mechanism to detect brake pad wear. The control unit calculates wear based on the difference between rotation angles measured during brake application and release, allowing the system to monitor its own condition without external inspection or additional sensors.
2Loss of information
If brake pad wear is not monitored, then the device complexity remains low, but loss of information occurs regarding the wear state of brake pads
Solution Approach 1:
The patent replaces traditional mechanical wear indicators or sensors with an electrical measurement system. The control unit measures the spindle rotation angle using electrical signals from the motor position sensor, calculates wear information digitally, and displays it electronically, substituting mechanical detection methods with electrical and computational approaches.
Solution Approach 2:
The motor position sensor serves multiple functions: it controls the motor for brake application and release, and simultaneously measures the spindle rotation angle for wear detection. This multi-functionality allows wear monitoring without adding dedicated sensors or measurement devices, reducing overall system complexity.
3Reliability
If real-time wear notification is implemented, then safety improves through timely pad replacement, but the device complexity increases due to additional control and notification components
Solution Approach 1:
The patent merges the wear detection function with the existing brake control system. The control unit that already manages motor operation for brake application and release is extended to also calculate wear based on rotation angle differences. The notification is integrated into the existing display device, combining multiple functions into existing components rather than adding separate systems.
Solution Approach 2:
The system performs self-monitoring and self-notification by utilizing its own operational data (spindle rotation angles during brake cycles) to detect wear and automatically notify the driver through the display device, without requiring external monitoring equipment or manual inspection.
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 real-time notification of brake pad wear to the driver, preventing accidents by ensuring timely pad replacement and maintaining brake performance.
Implementation Method 1
an electromechanical brake system that receives a depressing force from the driver as an electric signal and operates an electric device such as a motor based on the electric signal to provide a braking force to a vehicle
Implementation Method 2
converts a rotational force of a motor into a linear motion through the motor, a speed reducer, and the like to provide a clamping force to a brake disc
Data Source
AI summary
Provided is an electromechanical brake system comprising an actuator of an electromechanical brake operated by a motor, the electromechanical brake system including: a motor driving unit configured to drive the motor; and a control unit configured to be electrically connected to the motor driving unit, wherein the control unit is configured to: calculate a first rotation angle of a spindle in a brake apply mode of the electromechanical brake, calculate a second rotation angle of the spindle in a braking release mode of the electromechanical brake, and when a difference between the calculated first rotation angle and the calculated second rotation angle exists, control a notification device to notify a wear state of a brake pad.