Active Speed Sensor Alignment Using Asymmetric Fastening
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Solution Overview
Problem
Existing passive sensors, particularly in the field of vehicle speed detection, require precise alignment during installation and cannot change orientation during operation, complicating installation and limiting the functionality of active sensors.
Innovation Solution
A sensor with a predetermined shape feature, such as a rib or depression, allows for easy and permanent alignment through a form-fitting connection with a fastening apparatus, utilizing a clamping sleeve with complementary shape features to secure the sensor in a predetermined orientation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If passive sensors are used for speed detection, then the sensor structure is simple, but the sensor cannot change orientation during operation and installation requires precise predetermined alignment
Solution Approach 1:
The sensor body is provided with an asymmetric first shape feature (such as a rib, protrusion, or depression) on its outer surface that breaks the rotational symmetry. This asymmetric feature engages with a complementary second shape feature in the fastening apparatus to permit rotation during installation until the correct orientation is achieved, while preventing any orientation change during operation. This resolves the contradiction by enabling easy alignment during installation without compromising structural simplicity.
2Adaptability or versatility
If active sensors are used for speed detection, then diagnostic functions and signal transfer are improved, but the sensor requires precise alignment during installation which complicates the installation process
Solution Approach 1:
The asymmetric first shape feature on the sensor body engages with the complementary second shape feature in the fastening apparatus to provide rotational guidance during installation. This mechanism allows the sensor to be easily aligned and secured in the correct orientation, eliminating the complexity of precise manual alignment while preserving the enhanced diagnostic and signal transfer capabilities of active sensors.
3Stability of the object's composition
If the sensor alignment is made fixed and permanent, then the sensor orientation cannot change during operation, but the installation process becomes more complex
Solution Approach 1:
The fastening apparatus incorporates a receptacle with a second shape feature that complements the first shape feature on the sensor body. This dynamic engagement allows the sensor to rotate freely during installation until the correct orientation is achieved, at which point the shape features engage to lock the sensor in place. This dynamic-to-static transition resolves the contradiction by enabling easy alignment during installation while maintaining fixed orientation during operation.
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 simplified and secure installation of active sensors, allowing for accurate detection of wheel movement direction and enabling diagnostic functions, including the ability to detect slow movements from a standstill.
Implementation Method 1
the physical variable is a magnetic pulse induced by a movement of an object in the vicinity of the sensor
Data Source
AI summary
A system, comprising a sensor for detecting a physical variable in dependence on an alignment of the sensor around an axis of the sensor, including: a sensor body having a predetermined first shape feature on an outer surface of the sensor body for enabling a predetermined alignment of the sensor around the axis, wherein the first shape feature is configured to fit a complementary shape element of a second shape feature and a fastening means.