Radar Sensor Contact Measurement for Bumper Attenuation
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Solution Overview
Problem
Current methods for measuring attenuation through irregular surfaces, such as car bumpers, are impractical and costly, especially in industrial production, due to the complexity of metallic paint and irregular surface geometries, which hinder reliable prediction and control of radar signal attenuation.
Innovation Solution
A measurement setup comprising a positioning system, a reference reflector with diffuse scattering members, and a three-dimensional imaging system that uses electromagnetic signals in the radar frequency range to compare reference and measurement images, allowing for the determination of attenuation by isolating the reflection from the reference reflector and disregarding reflections from the irregular surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If point-like measurements are used in industrial production, then measurement speed is improved, but measurement precision deteriorates because the complete field of view cannot be covered
Solution Approach 1:
The patent transitions from point-like measurements to planar surface measurements by placing the radar sensor in direct contact with the bumper surface. This dimensional change allows the sensor to scan the entire field of view area simultaneously, covering all relevant regions without requiring multiple sequential point measurements, thus resolving the contradiction between measurement speed and precision.
Solution Approach 2:
The patent introduces a contact interface (direct contact between radar sensor and bumper surface) as an intermediary that enables comprehensive field of view coverage. This contact-based approach acts as a mediator that allows the sensor to access and measure the entire relevant surface area, providing both speed and precision by eliminating the need for multiple discrete measurement points.
2Measurement precision
If radio frequency sensors are remotely placed behind the bumper for direct transmission measurement, then measurement precision is improved, but device complexity worsens due to extended cables and high tolerances
Solution Approach 1:
The patent extracts the radar sensor from its traditional remote position behind the bumper and relocates it directly to the bumper surface. This extraction eliminates the need for extended radio frequency cables and complex positioning systems, significantly reducing device complexity while maintaining measurement precision through the direct contact measurement approach.
Solution Approach 2:
The patent uses a contact-based radar sensor that replicates the measurement function at the actual measurement location (bumper surface) rather than remotely. This copying approach places the sensing capability directly where needed, eliminating the need for complex cable extensions and remote positioning infrastructure.
3Ease of manufacture
If traditional measurement methods are used for irregular surfaces, then ease of manufacture is improved, but measurement precision deteriorates due to surface irregularities affecting radar signals
Solution Approach 1:
The patent employs a flexible contact-based measurement approach that adapts to the dynamic irregularities of the bumper surface. The radar sensor can conform to surface variations through direct contact, allowing the measurement system to dynamically adjust to surface irregularities rather than requiring a fixed, rigid measurement setup, thus maintaining precision on complex geometries.
Solution Approach 2:
The patent applies local contact-based measurement at the specific measurement location on the bumper surface. By placing the radar sensor directly on the surface at the field of view location, the measurement system achieves local precision that accounts for surface irregularities without requiring complex global measurement systems, balancing ease of manufacture with measurement accuracy.
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 efficient and cost-effective measurement of attenuation through irregular surfaces by using reflection imaging against a reference target, providing a reliable method for industrial production by isolating the irregular surface reflections and focusing on the relevant scattering members within the radar field of view.
Implementation Method 1
a three dimensional imaging system having a field of view, the three dimensional imaging system being configured to use electromagnetic signals in the frequency range of a radar system
Implementation Method 2
the imaging system being configured to use reflection imaging against a reference target for generating a reference image
Implementation Method 3
a reference reflector having a collection of diffuse scattering members
Data Source
AI summary
A measurement setup for measuring attenuation through an irregular surface of a device under test is described. The measurement setup includes a positioning system, a reference reflector, and a three dimensional imaging system. The measurement setup has a reference state and a measurement state, wherein respective images are taken in the different states. The imaging system is configured to compare the images taken in the reference state and the measurement state to determine the attenuation of the device under test. Further, a reference reflector as well as a method for measuring attenuation are described.