Assertion: accelerometer's axis | /r/HasProperty | placed perpendicular
Facets:
value: to gravity
type: OTHER
value: to achieve better accuracy
type: PURPOSE
Source sentences:
text: The sensing axis should be placed perpendicular to gravity to achieve better accuracy—this will be discussed later.
text: That’s why the sensing axis should be placed perpendicular to gravity, because the road slope grade will be close to zero.