Search found 4 matches

by bobby183
Thu Nov 21, 2019 2:46 pm
Forum: Developer Discussions
Topic: Optical Flow signal delay
Replies: 4
Views: 783

Re: Optical Flow signal delay

No I am not using the flow deck, however the data I collected and plotted is the scaled raw output of the sensors before any fusion or processing, the driver I used to interface with the SPI module is the Bitcraze one: https://github.com/bitcraze/Bitcraze_PMW3901 The results should be repeatable usi...
by bobby183
Wed Nov 20, 2019 3:09 pm
Forum: Developer Discussions
Topic: Optical Flow signal delay
Replies: 4
Views: 783

Re: Optical Flow signal delay

Here's an example comparing the gyroscope and velocity sensor: Screen Shot 2019-11-20 at 10.00.40 AM.png I am rotating the board back and forth, I would expect the angular velocity and the velocity read by the sensor to be aligned, but as you can see the velocity sensor is ever so slightly lagging b...
by bobby183
Tue Nov 19, 2019 10:11 pm
Forum: Developer Discussions
Topic: Optical Flow signal delay
Replies: 4
Views: 783

Optical Flow signal delay

Hello, I have been playing around with the PMW3901 optical flow sensor for a little while, and I noticed something I could not find any reference to anywhere else. I was trying to validate the gyroscopic compensation for rotational velocity readings, when I noticed that the gyro signal and the optic...
by bobby183
Wed Sep 04, 2019 8:08 pm
Forum: Developer Discussions
Topic: Flow deck parameter question
Replies: 0
Views: 4292

Flow deck parameter question

Hi everyone, I am currently learning about Kalman Filters and studying how data is fused together from multiple sensors to obtain state estimations. I have been studying the flow deck and how the data obtained from it is used in the EKF to obtain an estimation of the drone's velocity. I have read th...