Arbitrarily six points of the log cross section are taken out by this theory and with these six points the optimum circle centering axis of the log internal envelope cylinder is regressed.

• 该理论是在原木的任意截面上取6个点,由这6个点回归出原木内包络圆柱的最佳圆心轴线,为高精度原木定心机的数控化提供先进的基础理论,提高原木的定心精度和单板的出材率及成品单板的合格率。