Rd-03D mmwave Sensor

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Hi everyone

I am trying to use this sensor to do the human in boats detection BUT it is going into a enclosure that is floating on the water, with waves. I know it works best if it is FIXED to a stable mount but this is not so. Would anyone know how to compensate for the harmonic waves and potential rotation motion as well? I have been told that it might be possible… if not, are there any suggestions on other sensors that might work for this application? Thanks in advance

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Hey @song179682,

That sounds like a pretty complex challenge with all the waves and motion involved! Hopefully, someone in the community has tackled something similar and can share their experience.

I’ve glanced through this paper which looks like it covers some of your topics - https://www.diva-portal.org/smash/get/diva2:1668701/FULLTEXT02 hopefully its helpful!

Best of luck with the project.

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Thanks Ryan,i am sure it is not ground breaking or anything and someone would have had to deal with this sort of stuff before, especially those dealing with boats and shaky thing.
The link you gave takes me to a page not found. Is it a portal i need to sign up to get to the article perhaps?
Thanks

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Hey @song179682,

Sorry about that, link looks to be working on my end, but try this one instead and you can download the PDF by clicking full text as shown below:

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Hi Song,

To pipe in, you would likely have to compile and build custom firmware for the sensor to be able to compensate - I haven’t come across any docs on how to do so for these devices.

Is there a reason you couldn’t use a PIR sensor for your project?
Liam

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hi liam, i was very impress by the technology and the targeted detection ability. Just trying to minimise the amount of false positive detections as there are lots of birds and flying in the area where the sensor needs to be. The aim is to detect for human presence thus i am experimenting with this module

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At a very high level thought, could adding a gyro sensor help provide the data to off set the movement ? the rotation data could help correct tilt due to waves and the accelerometer should help offset the up/down sort of movement.

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Hi Song,

Fair enough, a masked out PIR sensor might be the move then - unfortunately, mmwave sensors are only really usable in static environments.
A combo of other sensors could help reduce false positives though! An ultrasonic sensor could be used in hallways, sound sensors in living rooms, just some examples.

Hi Michael,

In theory I imagine they could - by no means do I fully understand how these sensors work, they do need some warming time when turning on before making valid measurements, but I’m unsure if the baseline could be ‘adjusted’ with an IMU - would be amazing for robotics projects.

Liam

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hi guys, i appreciate all the suggestions. I am not a programmer but will have to do more exploration of possibilities

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