Driver assistance systems and automated driving functions use environmental sensor systems to obtain input information for the realisation of various customer functions. This requires sensor integration into the overall vehicle, dealing with competing requirements. These include the consideration of the sensors specific requirements, seamless integration onto the vehicle and robustness of the sensor function against minor accidents, repairs and misuse. The focus of interest is the performance of the sensor system regarding various integration conditions. Appropriate tests are realized during development process. Manual test procedures partly executed under extreme environmental conditions are state of the art.
An automated test system is developed, based on test procedures of environmental sensors used for parking assistance that works with ultrasonic sensors. Due to a high degree of automation, it is possible to increase the test frequency and reduce the costs per test execution at the same time. Furthermore, lower tolerances and a higher reproducibility improve the quality of the measurements. In addition, the user benefits from an automated processing of the measured values. The test system is applicable in the entire parameter interval of the environmental conditions of the known manufacturer and working circuit specifications.
Based on test series the technical and economic goals using the automated test system are evaluated. This article presents a detailed description and discussion of achieved results regarding a comparison of manual and automatized tests. Therefore, the comparison focusses on test frequency and measurement results.
The described concept of the test automation for ultrasonic sensor systems, known as EDscene, has a modular design. This allows an adaption to test systems of various sensor systems with minimal effort. Furthermore, the development of this test system offers the potential to carry out multiple test sequences in parallel. Currently, tests are executed sequentially in the front and in the back of the vehicle with a need of an initial setup for each procedure. In the future, a transformation towards a circulating system could allow the users to test environmental sensors with a single initial setup. However, the measurements of the article are based on a portable version of EDscene. A stationary, laboratory setup could additionally increase both efficiency and accuracy.
Automated Testing of Vehicle Integrated Environmental Sensors
Proceedings
2021-08-03
11 pages
Article/Chapter (Book)
Electronic Resource
German
Automated Testing of Vehicle Integrated Environmental Sensors
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