Brake Disc Positional Deviation Measurement Apparatus
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Solution Overview
Problem
Current methods fail to accurately and separately measure positional deviations such as axial perpendicularity and disc runout of a brake disc relative to a caliper seat, leading to undiagnosed mechanical malpositions that cause vibrations during braking.
Innovation Solution
An apparatus with at least two stationary distance sensors connected to the caliper seat measures distances between the brake disc's flat faces at different radii, transmitting these measurements to an evaluation device to calculate angular deviations, allowing for the separate determination of axial perpendicularity and disc runout, and optionally surface parallelism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional measuring devices are used to inspect brake discs, then basic concentricity and runout can be checked, but separate measurement of axial perpendicularity relative to caliper seat is not provided
Solution Approach 1:
The measuring device segments the measurement task by using multiple independent distance sensors positioned at different radii to separately measure axial perpendicularity, disc runout, and surface parallelism. This segmentation allows each parameter to be measured independently while using a unified measurement system.
Solution Approach 2:
The measuring device achieves multi-functionality by enabling simultaneous measurement of multiple positional deviation parameters (axial perpendicularity, disc runout, surface parallelism) using a single integrated apparatus with multiple distance sensors, eliminating the need for separate specialized measuring devices for each parameter.
2Measurement precision
If multiple distance sensors are used to measure multiple positional parameters, then measurement precision improves, but device complexity increases
Solution Approach 1:
The invention merges multiple measurement functions into a single integrated apparatus. Multiple distance sensors, rotation angle sensor, and evaluation device are combined into one system that simultaneously measures axial perpendicularity, disc runout, and surface parallelism, reducing the need for multiple separate devices.
Solution Approach 2:
The evaluation device serves as an intermediary that processes raw distance measurements from multiple sensors and rotation angle data, automatically calculating and separating the different positional deviation parameters. This intermediary processing simplifies the overall system by centralizing the complex measurement analysis.
3Ease of operation
If vibration-based methods are used to detect disc runout, then qualitative assessment is possible, but quantitative measurement of axial perpendicularity and separate error sources cannot be obtained
Solution Approach 1:
The invention replaces vibration-based mechanical detection with optical distance sensors that directly measure positional deviations. This substitution enables precise quantitative measurement of axial perpendicularity and separate error sources without relying on indirect vibration analysis.
Solution Approach 2:
The measurement system creates a precise geometric copy of the brake disc's positional relationships by measuring distances at multiple radii and angles, allowing accurate reconstruction and analysis of axial perpendicularity, disc runout, and surface parallelism without physical contact or vibration induction.
Data Source
AI summary
The invention relates to a method and an apparatus for ascertaining a positional deviation of a brake disc (30) relative to a caliper seat (11). According to the invention, an angular deviation (34) from the parallel between the brake disc (30) and the caliper seat (11) is measured in that an apparatus (1) for ascertaining the positional deviation of the brake disc (30) is connected to the caliper seat (11), the apparatus (1) comprising at least two distance sensors (20, 22) that are stationary with respect to the caliper seat (11) and take measurements in the direction of a first flat face of the brake disc (30), the distance sensors (20, 22) transmitting distances (A, A′) between the first flat face of the brake disc (30) and the distance sensors (20, 22) measured at different radii (R, R′) of the brake disc (30) to an evaluation device, the angular deviation (34) of the brake disc (30) being ascertained by the evaluation device from the distances.