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SAE J2735-Draft-Rev15 [issued: 01-30-07]
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90 -
This is an SAE Motor Vehicle Council draft document of the DSRC committee, subject to change.
MSG
MSG
In addition, this item may be used by data structures in other ITS standards.
7.47 Data Element: DE_SteeringWheelAngleConfidence
Use: This DE is used to provide to listeners the confidence interval of the 95% confidence level for the currently
reported value of DE_SteeringWheelAngle, taking into account the current calibration and precision of the
sensor(s) used to measure and/or calculate the value. This data element is only to provide the listener with
information on the limitations of the sensing system; not to support any type of automatic error correction or to
imply a guaranteed maximum error. This data element should not be used for fault detection or diagnosis, but if a
vehicle is able to detect a fault, the confidence interval should be increased accordingly.
The frame of references and axis of rotation used shall be accordance with that defined in SAE J670, Issued 1976-
07 and its successors. Note the definitions provided in Figure 1 (Tire Axis System) and Figure 2 (Directional
Control Axis Systems).
ASN.1 Representation:
SteeringWheelAngleConfidence ::= ENUMERATED {
notEquipped (0), -- B'00 Not Equipped
prec10deg (1), -- B'01 2 degrees
prec1deg (2), -- B'10 1 degree
prec0-02deg (3) -- B'11 0.02 degrees
}
XML Representation:
<xs:simpleType name="SteeringWheelAngleConfidence" >
<xs:annotation>
<xs:appinfo>
notEquipped (0) -- B'00 Not Equipped
prec10deg (1) -- B'01 2 degrees
prec1deg (2) -- B'10 1 degree
prec0 02deg (3) -- B'11 0.02 degrees
</xs:appinfo>
<xs:documentation>
Encoded as a 2 bit value
</xs:documentation>
</xs:annotation>
<xs:union>
<xs:simpleType>
<xs:restriction base="xs:unsignedInt">
<xs:minInclusive value="0"/>
<xs:maxInclusive value="3"/>
</xs:restriction>
</xs:simpleType>
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="notEquipped"/>
<xs:enumeration value="prec10deg"/>
<xs:enumeration value="prec1deg"/>
<xs:enumeration value="prec0 02deg"/>
</xs:restriction>
</xs:simpleType >
</xs:union>
</xs:simpleType>
Used by: This entry is directly used by the following 3 other data structures in this standard (record type, descriptive name,
ASN.1, and XML name (if present) of each):
DF