力值曲线的问题

ccbbcc 2019-08-19 04:59:02

这是我力值标定的曲线。
10吨传感器，标定6个点。标定完，得到码值，还有力值。
根据力值和码值的比例关系计算采集的力值。
代码：
Private Sub CalibrateSixDot() '标定六个点
If (StrgenthRec < ZeroDot) Then '力值

DrawValue = 0

ElseIf (StrgenthRec < FirstDot) Then
DrawValue = LittleCoefficient * (StrgenthRec - ZeroDot) / (FirstDot - ZeroDot)

ElseIf (StrgenthRec < SecondDot) Then

DrawValue = (LargeCoefficient - LittleCoefficient) * (StrgenthRec - FirstDot) / (SecondDot - FirstDot) + LittleCoefficient

ElseIf (StrgenthRec < ThreeDot) Then

DrawValue = (ThreeCoefficient - LargeCoefficient) * (StrgenthRec - SecondDot) / (ThreeDot - SecondDot) + LargeCoefficient

ElseIf (StrgenthRec < FourDot) Then

DrawValue = (FourCoefficient - ThreeCoefficient) * (StrgenthRec - ThreeDot) / (FourDot - ThreeDot) + ThreeCoefficient

ElseIf (StrgenthRec < FiveDot) Then

DrawValue = (FiveCoefficient - FourCoefficient) * (StrgenthRec - FourDot) / (FiveDot - FourDot) + FourCoefficient

Else

DrawValue = FiveCoefficient * (StrgenthRec - ZeroDot) / (FiveDot - ZeroDot)

End If
Call KNNKggkgfFormat

End Sub
StrgenthRec是实时采集的采样值，ZeroDot是第一个点标定的码值，
FirstDot是第二个点标定的码值，SecondDot是第三个点标定的码值，
ThreeDot是第四个点标定的码值，FourDot是第五个点标定的码值，
FiveDot是第六个点标定的码值。
LittleCoefficient代表20KN，LargeCoefficient代表40KN,
ThreeCoefficient代表60KN，FourCoefficient 代表80KN，
FiveCoefficient代表100KN.
我觉得计算公式没错呀，为什么曲线是那个鸟样呢？请大神指教，谢谢！

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