SmartMotion® MEMS Motion Sensors

Hello

I am seeing substantial (between 10 and 20 m/s**2) low frequency (i.e. remains after an aggressive 10Hz cutoff filter) non-zero mean noise on an MPU9250 accelerometer. In the time domain, the noise shows up as "impulses" -- the signal will be mostly concentrated around 0 (as expected), and then occasionally will spike up to high values, before returning to roughly 0. The spikes are always in the same direction. The signals are observed on many (>10) different boards, and are observed independent of the IMU config parameters (DLPF settings & scale).

I've read multiple topics about that but they are all very old and perhaps outdated.

My question is if it's possible to get working HMC5883L compass with the MPU6050 in order to get 9 axis sensor fusion.
I see that in the Embedded MotionDriver 6.12 example there is only AK89xx compass suported, however it seems to me that rewriting setup_compass() and mpu_get_compass_reg() from inv_mpu.c to support the HMC5883L should be rather easy.

Is there something that I miss? Or maybe there already working solution for HMC5883L?

I am communicating with MPU-9250 using NXP Kinetis K-65F processor, I am able to read ACCEl, GYRO registers on I2C but whenever I try to flash firmware on DMP, I get memcmp errors.

int mpu_load_firmware(unsigned short length, const unsigned char *firmware, unsigned short start_addr, unsigned short sample_rate)
{
unsigned short ii;
unsigned short this_write;
/* Must divide evenly into st.hw->bank_size to avoid bank crossings. */
#define LOAD_CHUNK (16)
unsigned char cur[LOAD_CHUNK], tmp[2];

Hello All,

I am Somatixs CTO and we are based in Israel/New York.
We are automatically detecting smoking gestures from smartwatch accelerometer and gyroscope signals.

I encountered an obstacle and hoped you could help introduce me to someone in your company that can help.

I put 2 LG urbane smartwatches (with Invensense sensors inside) on my wrist and perfomed smoking gestures. I hoped to get fairly similar signals from both devices but didn't.
In some areas the accelerometer signals are very similar while in other the signals are very different.

Hello,
I am a master student and currently working on my master thesis now. I am working on a project in a vibration (high noise) part and a non-vibration part.
I will be using the MPU-9150 (it is part of a IMU, which I can use), however, I am unsure about the sampling rate. Recently one said to me that a higher sampling rate doesn’t guarantee a better measurement.
I am wondering why it is the case. Can someone help me on this question?
Thank you very much in advance!

I've got a conversation on-going with support but it's taking a long time to get info.

Are product has just shifted to MPU-9250 and we're finding between 10 and 20% of MPU-9250's have very poor noise levels on the magnetometer.

We even bought some of the official EMSENSR-MPU9250 breakout boards to prove a point - it's not our design.

Noise should be 0.85uT ish but we're finding up to 3.5 uT noise in some MPU-9250 samples. The noise also follows the IC, if we swap ic on our boards the noise profile follows.

Hi all,

Where can i find all the application Notes related to MPU9250...?

Regards
Charan

Hi all,

I would like to use the Tap Detection feature MPU9250. Is there any application note which tells the flow of register configurations and enabling interrupts to use Tap[ detection feature.

Regards
charan

Does icm30630 Sdk(or sensor studio) provide a sleep analysis alghoritm?

Hi,
I just started to test MPU9250.
When reading the MPU9250's Register Map, in page 13, it is about how to config DLPF.
There are somethings that I don't figure it out.
In the middle portion of Page 13, it says: