sca3100 BI Technologies, sca3100 Datasheet - Page 29

• Manufacturer Part Number: sca3100
• Description: Automotive Digital Accelerometer Platform
• Manufacturer: BI Technologies

6.2 Output to Angle Conversion
VTI Technologies Oy
www.vti.fi
Product output is function of sin and it can be transferred to angle using the following equation for
conversion:
Where Output
product. Nominal sensitivity is determined at datasheet of product and 0 g can be used in Offset
not measured after installation. To read output of product refer chapter Output Data Conversion.
Angles close to 0° inclination can be estimated quite accurately with straight line conversion but for
the best possible accuracy, arcsine conversion is recommended to be used. The following table
shows the angle measurement error if straight line conversion is used.
Straight line conversion equation:
Where Output
product.
α
α
=
=
arcsin
⎛
⎜ ⎜
⎝
Output
⎛
⎜ ⎜
⎝
Sensitivit
Output
LSB
LSB
LSB
Tilt angle [°]
0
1
2
3
4
5
10
15
30
−
is output in g, Offset
is output in g, Offset
Sensitivit
Offset
LSB
y
−
Offset
0
g
y
⎞
⎟ ⎟
⎠
,
Straight line conversion error [°]
0
0.0027
0.0058
0.0094
0.0140
0.0198
0.0787
0.2185
1.668
0
g
Doc. Nr. 82 694 00 C
⎞
⎟ ⎟
⎠
,
0g
0g
is offset at 0 g position and sensitivity is sensitivity of
is offset at 0 g position and sensitivity is sensitivity of
SCA8X0/21X0/3100 Series
29/35
0g
if