ISM330DHCX vs ISM330BX vs LSM6DSV32X

[phly]

We need ~50k 6-axis IMUs for an application that will experience > 2000dps yaw rate and highly dynamic motion. 

The spec sheets for the ISM330BX and LSM6DSV32X seem to not paint a complete picture regarding the angular zero-rate at different G_FS angular rate measurement range.

We're looking for an ST engineer to make a recommendation for the highest-quality IMU with respect to angular drift and accuracy while in highly dynamic motion. We are interested in IMUs with on-board sensor fusion. 

Other questions:
The ISM330BX seems to be better than the ISM330DHCX in several dimensions, but appears to use a different accelerometer that is not strictly better than what is found in the ISM330DHCX. Is this correct?

Is there an IMU that can be classified as "strictly the best" IMU under highly dynamic motion & vibration for mobile vehicle and robotics applications?

[Federica Bossi · Accepted solution]

Hi @phly ,

Welcome to ST Community!

The angular zero rate is not reported at different FS because it is tested only in characterization and thus not guaranteed in production. If you need this information I suggest you to contact our online support here that can share with you some data.

For dynamic motion & vibration for mobile vehicle and robotics applications have you already looked at ASM330LHH?

[Syntech]

Oh! I recognize this group of people. They are part of slimeVR and are working on cost effective trackers mainly in the DIY realm. To note, trying to use the ism330 without using an mpu such as stm32’s to do fusion(and I suggest you use one of the many!); is to look into their in house fusion solution and their GitHub drivers! It’s very useful and coupled with proper sensors that can help you achieve what you’re looking for. Just have to be open to change!

I looked at slimesvr’s code and finally see you moving to SPI interrupts and pooling, so a step in the right direction. And I noticed one of the programmers; Lexie was it? Is doing amazing feats with nrf. Just gota be open to change in this fast moving world! One of the harder things to understand in the college years.I remember those times.. anyway, I hope you have a Pleasant evening and thank you for taking such a business hit to keep DIY alive!