There is a large error when using BMA456 to measure the static tilt angle IC without vertical ground

[jhhead]

My question: I am using the BMA456 to measure the static tilt angle. When the IC is installed vertically to the ground, I get an accurate tilt angle, but when the IC is not vertical to the ground, a large error occurs. What should I do?

[BSTRobin]

Hi jhhead,

BMA456 only ourput raw data when calculating static tilt angle.
Do you mean that the raw data does not meet expectations?

[jhhead]

The x and y data obtained when the IC is vertical to the ground are accurate, but if the xy plane is not parallel to the gravity, it means that the IC is not perpendicular to the ground, and the maximum value of the x and y axes will be less than 1g, and the calculated angle will be There is an error. I don't know how to compensate.

[jhhead]

[jhhead]

Supplement: The IC is installed on the xy plane and rotates around the z-axis. The z-axis is parallel to the ground. When the z-axis is tilted, the error of the IC increases.