Disk Pulse Ultimate 15.5.16 downloading2/26/2024 ![]() ![]() ![]() Such a setup would combine the different sensors’ advantages, which may thus lead to improved system robustness. ![]() Ultrasonic sensors may be included as primary sensors or as vital components in a complementary sensor fusion setup that comprises additional sensors. Consequently, ultrasonic sensors are especially well-suited for robot operation in low-visibility scenarios, e.g., in a dark room and outdoors at night, and for avoidance of transparent plastic or glass obstacles. Another important aspect is that direct physical contact is not necessary. Therefore, they do not depend on obstacle color, lighting as well as transparency or material-related radar cross section. Most importantly, they are not susceptible to obstacles’ optical and electromagnetic properties. In these application areas, ultrasonic sonar sensors show distinct advantages in comparison to other sensor technologies, which are based on other physical principles, such as LIDAR (Light Detection And Ranging), cameras and RADAR (Radio Detection And Ranging) sensors. The research indicates that our engineered features and excitation signals are suitable for the target classification task.Īir-based ultrasonic sonar sensors are often deployed for obstacle avoidance and navigation purposes in application areas such as automotive, factory automation as well as mobile ground and airborne robotics. A comparison of achievable classifier performance with wideband and narrowband chirp excitation signals was conducted as well. ![]() In doing so, one is able to distinguish different target geometries with a high rate of success and to perform tests with ANNs regarding their capabilities for size discrimination of targets with the same geometric shape. We concentrate on features that are related to target strength estimates derived from pulse-compressed echoes. Artificial neural networks (ANNs) with multiple hidden layers are applied as classifiers and different features are tested as well as compared. In the presented work, sonar targets of different geometric shapes and sizes are classified with custom-engineered features. They can also be exploited to identify and classify sound-reflecting objects (targets), which may then be used as landmarks for navigation. Ultrasonic sonar sensors are commonly used for contactless distance measurements in application areas such as automotive and mobile robotics. ![]()
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