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AWR1843AOP: mmWave sensor accuracy and adequacy for application

Part Number: AWR1843AOP


Hello TI 

We have been doing scoping work to develop a medical device around TI mmWave devices specially the AWR1843AOP.

Our application involves sensing a small reflector around a marvel shape but it may be as large as a closed fist at a distance range from 3 meters down to 20cm.

We require to sense the distance and angle of the reflectors as accurately as possible. 1mm and 1 degree accuracy would be great. Speed or refresh rate aren't priority, they can be slow. 

The angle of the reflector to the surface of the sensor may be up to 20 degrees in both axes. 

The reflectors we use are either corner cube prism, small mirrors, aluminium coated boxes or a metal spoon. We can use something of similar dimensions. 

So far in our research we have used tools such as the TI mmWave_Demo_Visualizer and the MMWAVE_STUDIO for simple range tests. We've tried going through the labs but there isn't anything much related to our application except for the out of the box demo and the high accuracy level sensing which we haven't been able to get to work with required accuracy. 

We have not being able to get the level of accuracy in range or degrees after trying for a couple of weeks and don't know what else to try. 

Questions: 

Do the TI mmWave sensors allow for sensing the reflectors listed above? or is there something more efficient at being detected by the sensor whilst being as small as possible? 

Do the TI mmWave sensors work at a range of 20cm - 3m with a range accuracy of 1mm and 1 degree? 

What would be the sensor most appropriate for the application? 

I hope this can be useful to anyone looking to get started on mmWave sensors. 

Thank you.