How to eliminate the influence of gravity acceleration on accelerometer

duguyining

How to eliminate the influence of gravity acceleration on accelerometer [Copy link]

 

 

How to eliminate the influence of gravity acceleration of the accelerometer? I need to get the real acceleration value of the device.

maychang

Would it be possible to take a reading of your accelerometer while it is stationary, and then subtract this value from the measurement afterward?

littleshrimp

You can find relevant information about "linear acceleration"

Android can directly obtain linear acceleration data without gravity. You can look at its source code

Some people on the Internet say that it can be achieved with a low-pass filter

littleshrimp

There is something called linear acceleration in the MotionFX library of open mems of st. You can also try it.

float linear_acceleration_6X[MFX_NUM_AXES]; /* 6 axes device frame linear acceleration */

duguyining

littleshrimp posted on 2019-7-25 11:26 There is something called linear acceleration in the MotionFX library of open mems of st. You can also try float linear_accele ...

I want to eliminate the effect of gravity acceleration using only the accelerometer, without combining it with the gyroscope and magnetometer.

duguyining

Maychang posted on 2019-7-24 17:53 Would it work to take a reading when your accelerometer is stationary and then deduct this value after the measurement?

It won't work. Once the accelerometer's attitude and spatial position change, it will still be affected by the gravity component.

littleshrimp

duguyining posted on 2019-8-1 15:09 I want to use only the accelerometer to eliminate the influence of gravity acceleration, without combining the gyroscope and magnetometer.

I don't know much about this, I think it would be difficult to use only acceleration

zxcv512

I would like to ask if you have found a solution using only the accelerometer? I am also facing the same problem.

pycharm2020

zxcv512 posted on 2020-6-4 15:32 Did you find a solution using only the accelerometer? I am also facing the same problem.

Brother, have you found a way? I am also thinking about this problem now

littleshrimp

pycharm2020 posted on 2020-10-8 15:35 Brother, have you found a way? I am also thinking about this problem now

If only the accelerometer is used without combining with other sensors, the acceleration of the three axes during free fall will all be 0. It is impossible to determine the direction of gravity and naturally it is impossible to calculate the direction of movement of the sensor.

pycharm2020

littleshrimp posted on 2020-10-9 12:49 If only the accelerometer is used without combining other sensors, the acceleration of the three axes during free fall will be 0, and it is naturally impossible to determine the direction of gravity...

Yes, I just feel that I need another sensor. I am currently using the mpu-6050 sensor, which has both a three-axis acceleration and a gyroscope. I plan to use the gyroscope to measure all directions to remove the influence of gravity acceleration. How do you do it?

littleshrimp

pycharm2020 Posted on 2020-10-12 10:55 Yes, I just feel that I need another sensor. I am currently using the mpu-6050 sensor, which has both three axes...

ST officially provides library files. You can take a look at the MotionFX of X-CUBE-MEMS1, which requires the use of STM32 microcontrollers and ST sensors.

https://www.st.com/content/st_com/en/products/embedded-software/mcu-mpu-embedded-software/stm32-embedded-software/stm32cube-expansion-packages/x-cube-mems1.html

pycharm2020

littleshrimp posted on 2020-10-12 11:09 ST officially provides library files. You can take a look at the MotionFX of X-CUBE-MEMS1. It needs to use STM32 microcontrollers and ST sensors https:/ ...

Now I don't have access to stm32, I'll try to see if my method is feasible. But thank you anyway.

傲寒11

Brother, have you found a way? I am also thinking about this problem now

傲寒11

pycharm2020 posted on 2020-10-8 15:35 Brother, have you found a way? I am also thinking about this problem now

Brother, have you found a way? I am also thinking about this problem now