Timeline for Understanding the workings of an ultrasonic sensor
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
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| Jun 22, 2020 at 16:58 | comment | added | user136077 | Ray tracing in the same sense as rendering 3D models to 2D images doesn't work with ultrasonics. That's because the transmitter sends a coherent sinewave and the received signal should be summed with right phase angles in every point of the receiving transducer to get the total signal. Microwave radars have the same problem. Radar engineers overcame the complexity by considering the echoes as statistical phenomenas. | |
| Jun 22, 2020 at 14:59 | comment | added | user23567 | Thank you for your reply! Do you happen to know what I could look into to figure out where I could reasonably draw the line? I can't seem to find datasheets of fully integrated ultrasonic sensors (e.g. automotive) that detail how they evaluate their data. Thank you for the hint regarding the minimum distance, I've included that using a user option to set the minimum (and also maximum) distance in the ray tracing program. | |
| Jun 22, 2020 at 14:51 | review | First posts | |||
| Jun 22, 2020 at 18:13 | |||||
| Jun 22, 2020 at 14:49 | comment | added | Spehro 'speff' Pefhany | The echo will, at some point, be fainter than the noise level of your circuit & sensor so you can no longer be reasonably sure it's actually an echo. For other reasons you won't be able to detect something too close. | |
| Jun 22, 2020 at 14:44 | history | asked | user23567 | CC BY-SA 4.0 |