Lidar Sensor Test Device Using Trigger Detector and Diffuser
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Solution Overview
Problem
Existing lidar sensor testing methods require precise mechanical orientation and calibration, and are limited in their ability to simulate various real-world scenarios, making them inefficient for testing lidar sensors for assisted or autonomous driving applications.
Innovation Solution
A device and method for testing lidar sensors that utilize a trigger detector, a transmitting device, and optical elements to separate and manipulate optical paths, allowing for the simulation of various scenarios by emitting second light with a different wavelength and applying diffuse reflection and/or transmission to this light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional lidar testing methods are used, then mechanical orientation and calibration precision are required, but this increases device complexity and reduces testing flexibility
Solution Approach 1:
The patent introduces a second optical element (diffuser or translucent object) as an intermediary in the optical path. This intermediary element scatters the transmitted light to create diffuse reflections that simulate real-world objects, eliminating the need for precise mechanical orientation and calibration while maintaining testing accuracy
Solution Approach 2:
The patent creates optical copies of real-world scenarios by using the second optical element to generate diffuse reflections that mimic objects, surfaces, and environmental conditions. This allows virtual simulation of various testing scenarios without requiring physical replication of complex scenes, reducing mechanical complexity
2Productivity
If precise mechanical orientation and calibration are implemented, then testing accuracy is improved, but productivity decreases due to time-consuming setup
Solution Approach 1:
The patent replaces the mechanical alignment system with an optical solution. Instead of mechanically adjusting mirrors and optical components to achieve precise alignment, the system uses a second optical element (diffuser) that inherently creates the required optical paths through light scattering, eliminating time-consuming mechanical setup while maintaining measurement precision
Solution Approach 2:
The patent changes the optical parameters by introducing a second optical element that modifies the light propagation characteristics. This element transforms directed light into diffuse reflections through scattering, changing the optical path parameters to achieve both speed and precision without mechanical adjustment
3Adaptability or versatility
If traditional testing methods are used, then mechanical structure is required, but adaptability to various real-world scenarios is limited
Solution Approach 1:
The second optical element serves as a universal intermediary that can simulate various real-world scenarios (objects, surfaces, environmental conditions) by changing its properties or position, eliminating the need for complex calibration procedures while maintaining ease of operation across different test cases
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
This approach reduces the demands on mechanical accuracy and calibration, enables flexible and efficient simulation of real-world scenarios, and allows for over-the-air testing of lidar sensors, thereby improving testing efficiency and effectiveness.
Implementation Method 1
a first optical element that is configured to separate the first optical path from the second optical path
Implementation Method 2
a second optical element that is situated in the second optical path and that is configured to apply a diffuse reflection and/or transmission to the second light
Implementation Method 3
a trigger detector that is configured to receive the first light on a first optical path, the trigger detector being configured to generate a trigger signal as a function of the received first light
Data Source
AI summary
A device for testing a lidar sensor. The lidar sensor being configured to emit first light having a first wavelength. A trigger detector is configured to receive the first light on a first optical path, the trigger detector being configured to generate a trigger signal as a function of the received first light. At least one transmitter is configured to emit second light, having a second wavelength, as a function of the trigger signal, the second light being receivable on a second optical path by the lidar sensor. A first optical element is configured to separate the first optical path from the second optical path. A second optical element is situated in the second optical path and is configured to apply a diffuse reflection and/or transmission to the second light.