Sensor Test Chamber with Adjustable Emitters for Angular Resolution
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Solution Overview
Problem
Existing test arrangements for electromagnetic sensors, such as radar and lidar, struggle to accurately measure the angular separation and resolution capabilities of these sensors, particularly when distinguishing between closely spaced objects.
Innovation Solution
A test arrangement with a chamber and spacing device that allows for varying the distance between emitting elements in a single spatial direction, using transmission/receiving devices to simulate objects and evaluate sensor performance, while minimizing unwanted reflections through chamber lining and waveguide connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the distance between emitting elements is varied in multiple spatial directions, then the test coverage is improved, but the device complexity increases
Solution Approach 1:
The spacing device is segmented into multiple independent linear actuators, each responsible for adjusting the distance between emitting elements along a specific spatial axis. This segmentation allows the system to achieve multi-directional adjustment capability while maintaining manageable complexity by dividing the control function into separate, modular components.
2Measurement precision
If the chamber is lined with absorptive material to minimize reflections, then the measurement precision is improved, but the manufacturing complexity increases
Solution Approach 1:
Instead of requiring complex custom-molded absorptive structures, the patent uses standardized absorptive material panels that can be attached to the chamber interior surfaces. This copying approach uses off-the-shelf materials with known electromagnetic absorption characteristics, simplifying the manufacturing process while maintaining the precision benefits of reflection minimization.
3Reliability
If waveguide connections are used for transmission/receiving devices, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The waveguide connections are merged with the chamber structure itself, where the waveguides are integrated into the chamber walls rather than being separate components. This integration reduces the overall device complexity by combining multiple functions (signal transmission and structural support) into a single unified structure, while maintaining the high reliability of waveguide connections.
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 precise testing of sensor angular separation and resolution by varying the distance between emitting elements, ensuring reliable object detection capabilities, particularly for radar and lidar sensors, by simulating object distinguishability and minimizing interference.
Implementation Method 1
The chamber (K) can be lined in its interior essentially with material that will absorb electromagnetic signals
Implementation Method 2
at least two transmission/receiving devices (SE1, SE2) which are configured to receive first signals (S1) transmitted from the sensor into the chamber (K) and to transmit second signals (S2) for reception for the sensor
Data Source
AI summary
A test arrangement for a sensor, which is designed to detect objects by sending first electromagnetic signals and receiving second electromagnetic signals. The test arrangement has a chamber with a receptacle for the sensor. The chamber has at least two transmission/receiving devices which are configured to receive first signals transmitted from the sensor to the chamber and to transmit second signals for reception for the sensor. The at least two transmission/receiving devices each have an emitting element for emitting the second signals, wherein a spacing device is provided via which the distance of the at least two emitting elements from one another can be changed in exactly one spatial direction.