Uncategorized

UBlox ZED-F9K

GNSS Dead Reckoning — Sensor Fusion Filter not necessary?

Ask QuestionAsked todayActive todayViewed 13 timesReport this ad0

My question might be a bit off-topic but I don’t know where else to ask.

When I do have a GNSS Module with integrated IMU and Dead Reckoning, for example, the Ublox ZED – F9K.

Does it still make sense to use a Filter for fusing GNSS and IMU / Odometry data or is that not necessary as the Module is handling that for me?

Or will the Dead Reckoning just enhance the precision after applying a Filter even more?imusensor-fusionfilterdead-reckoninggnssshareedit  follow  flag asked 14 hours agoStrohhut11133 bronze badges

add a comment

1 Answer

ActiveOldestVotes0

Question

Is it necessary to use any filter to fuse Ublox ZED-F9K’s GNSS and IMU/Odometry data?


Answer

My answer is NO, for the following reasons:

(1) GNSS and IMU are independently developed modules with matured software. It is unlikely for the vendor to “fuse” them at the hardware level. A more efficient method is to let the MCU/SBC to talk to either or both guys using I2C, or UART and I2C.

(2) uBlox uCenter uses very simple, text based NMEA0183 protocol, and update rate is of the order of 25Hz, so the user can easily pass the slow GNSS data to IMU for processing.shareeditdeleteflag answered just nowtlfong0110111 bronze badge New contributoradd a comment

Categories: Uncategorized

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.