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摘要：公差分析軟件、尺寸鏈計算、尺寸公差分析、公差仿真分析、尺寸工程、尺寸鏈校核
在上期內容中，我們對DTAS Python腳本自動化建模-專治建模界的 "二高" 問題（高重復、高耗時）進行了深入探討。DTAS可以自由編寫Python腳本，開發(fā)自己特定場景的虛擬裝配與虛擬測量 ,成功將用戶從繁瑣的重復建模中解放出來，不僅大幅提升了建模效率，還讓腳本能夠重復利用，真正實現(xiàn)了建模的自動化與智能化。
而本期，我們將繼續(xù)深入探索DTAS Python腳本的——自定義測量功能，看看它是如何為復雜應用場景提供定制化解決方案的。
Python腳本應用場景舉例
場景舉例
如圖所示：6塊馬蹄狀的零件通過兩孔銷裝到綠色圓盤，6塊馬蹄狀內表面圍成的最小圓的直徑是如何變化的？軟件中是沒有此類型測量，DTAS軟件可以通過編寫腳本來實現(xiàn)此場景下的測量。
軟件操作
準備好了嗎？讓我們開始這段自動化測量的探索之旅，一起解鎖DTAS 3D公差仿真分析的新技能吧！
點擊鏈接：Python腳本自動化自定義測量/Python腳本自動化自定義測量
案例腳本
如下：
# DTAS Soft
# zjy 20241104
# Function:求xy平面上24個點算出的最大外接圓半徑及x，y坐標
#
# 獲取24個點的坐標參數
p1 = [features[0][0], features[0][1], features[0][2]]
p2 = [features[1][0], features[1][1], features[1][2]]
p3 = [features[2][0], features[2][1], features[2][2]]
p4 = [features[3][0], features[3][1], features[3][2]]
p5 = [features[4][0], features[4][1], features[4][2]]
p6 = [features[5][0], features[5][1], features[5][2]]
p7 = [features[6][0], features[6][1], features[6][2]]
p8 = [features[7][0], features[7][1], features[7][2]]
p9 = [features[8][0], features[8][1], features[8][2]]
p10 = [features[9][0], features[9][1], features[9][2]]
p11 = [features[10][0], features[10][1], features[10][2]]
p12 = [features[11][0], features[11][1], features[11][2]]
p13 = [features[12][0], features[12][1], features[12][2]]
p14 = [features[13][0], features[13][1], features[13][2]]
p15 = [features[14][0], features[14][1], features[14][2]]
p16 = [features[15][0], features[15][1], features[15][2]]
p17 = [features[16][0], features[16][1], features[16][2]]
p18 = [features[17][0], features[17][1], features[17][2]]
p19 = [features[18][0], features[18][1], features[18][2]]
p20 = [features[19][0], features[19][1], features[19][2]]
p21 = [features[20][0], features[20][1], features[20][2]]
p22 = [features[21][0], features[21][1], features[21][2]]
p23 = [features[22][0], features[22][1], features[22][2]]
p24 = [features[23][0], features[23][1], features[23][2]]
# 求24個點在xy平面上的投影點
facePos1 = [1,0,0]
facePos2 = [0,1,0]
facePos3 = [1,1,0]
p1Pos = PointProjectionOntoThePlane(p1,facePos1,facePos2,facePos3)
p2Pos = PointProjectionOntoThePlane(p2,facePos1,facePos2,facePos3)
p3Pos = PointProjectionOntoThePlane(p3,facePos1,facePos2,facePos3)
p4Pos = PointProjectionOntoThePlane(p4,facePos1,facePos2,facePos3)
p5Pos = PointProjectionOntoThePlane(p5,facePos1,facePos2,facePos3)
p6Pos = PointProjectionOntoThePlane(p6,facePos1,facePos2,facePos3)
p7Pos = PointProjectionOntoThePlane(p7,facePos1,facePos2,facePos3)
p8Pos = PointProjectionOntoThePlane(p8,facePos1,facePos2,facePos3)
p9Pos = PointProjectionOntoThePlane(p9,facePos1,facePos2,facePos3)
p10Pos = PointProjectionOntoThePlane(p10,facePos1,facePos2,facePos3)
p11Pos = PointProjectionOntoThePlane(p11,facePos1,facePos2,facePos3)
p12Pos = PointProjectionOntoThePlane(p12,facePos1,facePos2,facePos3)
p13Pos = PointProjectionOntoThePlane(p13,facePos1,facePos2,facePos3)
p14Pos = PointProjectionOntoThePlane(p14,facePos1,facePos2,facePos3)
p15Pos = PointProjectionOntoThePlane(p15,facePos1,facePos2,facePos3)
p16Pos = PointProjectionOntoThePlane(p16,facePos1,facePos2,facePos3)
p17Pos = PointProjectionOntoThePlane(p17,facePos1,facePos2,facePos3)
p18Pos = PointProjectionOntoThePlane(p18,facePos1,facePos2,facePos3)
p19Pos = PointProjectionOntoThePlane(p19,facePos1,facePos2,facePos3)
p20Pos = PointProjectionOntoThePlane(p20,facePos1,facePos2,facePos3)
p21Pos = PointProjectionOntoThePlane(p21,facePos1,facePos2,facePos3)
p22Pos = PointProjectionOntoThePlane(p22,facePos1,facePos2,facePos3)
p23Pos = PointProjectionOntoThePlane(p23,facePos1,facePos2,facePos3)
p24Pos = PointProjectionOntoThePlane(p24,facePos1,facePos2,facePos3)
# 求xy平面上24個點算出的最大內接圓半徑及x，y坐標
listPos = [p1Pos[0],p1Pos[1],p2Pos[0],p2Pos[1],p3Pos[0],p3Pos[1],p4Pos[0],p4Pos[1],\
p5Pos[0],p5Pos[1],p6Pos[0],p6Pos[1],p7Pos[0],p7Pos[1],p8Pos[0],p8Pos[1] ,\
p9Pos[0],p9Pos[1],p10Pos[0],p10Pos[1],p11Pos[0],p11Pos[1],p12Pos[0],p12Pos[1],\
p13Pos[0],p13Pos[1],p14Pos[0],p14Pos[1],p15Pos[0],p15Pos[1],p16Pos[0],p16Pos[1],\
p17Pos[0],p17Pos[1],p18Pos[0],p18Pos[1],p19Pos[0],p19Pos[1],p20Pos[0],p20Pos[1],\
p21Pos[0],p21Pos[1],p22Pos[0],p22Pos[1],p23Pos[0],p23Pos[1],p24Pos[0],p24Pos[1]]
# 0:半徑; 1: x; 2:y
#dtas底層函數FittingMaxCircleIn-最大內接圓
res = FittingMaxCircleIn(listPos)
SetHolePinCenter('monitor', DTASPoint(res[1],res[2], 30),False)
SetHolePinDiameter('monitor', 2*res[0],False)
measureValue = 2*res[0]
# end總結
DTAS創(chuàng)造性的將CAE腳本自動化技術、二次開發(fā)等引入CAT領域
1.開放底層API、支持宏錄制、編寫Python腳本，將用戶從繁瑣重復的建模中解放，使用腳本自動化技術可以提高建模效率，并且腳本等可以重復使用；
2.支持用戶開發(fā)自定義的公差分析模型如虛擬裝配虛擬測量等，大大增強了軟件面對復雜應用場景的拓展性與中高級、專家及用戶使用軟件的自由性;
3.構建軟件用戶生態(tài)、公差自動化智能化分析的前提。
下期我們介紹第三個場景的應用，敬請期待！
