功能:通过“选择面”的方式在CAD模型上拾取面，然后得到曲线并以此线作为理论线进行的一种测量曲线的方式。
操作:点击“曲面曲线”菜单中的“周边扫描”选项，如(图1)所示:
(图1)
操作步骤：
1） 先导入CAD模型，建立坐标系 并设置安全平面。
2） 选择“曲面曲线”菜单，点击“周边扫描”选项并激活安全平面，弹出对话框。如（图2）所示：
(图2）
界面介绍：
名称：生成结果的名称，使用默认名称或自定义名称。
封闭：设置曲线是开放曲线还是封闭曲线。
选择曲面：用于在模型上选取需要截取的平面或曲面。在选择的曲面上创建截面线比在整个模型上创建截面线速度快。 打开该界面后，CAD工具条上“选择曲面”按钮被选中，在模型上拾取曲面，面拾取错误可进行删除或清空重新拾取。需要查看哪些面被选过，可点击“显示”按钮，则模型上被选择的面按设置的颜色显示，颜色不明显也可修改颜色再显示
拾取点：在模型上拾取曲线的位置。
偏置距离：修改及显示曲线偏置的位置。
偏置方向：偏移方向分为内和外两种方式。
偏置曲线：在模型上确定及显示拾取曲线后的位置。
选择曲线：在模型上拾取确定截面线位置的点。拾取后点的坐标值读入X、Y、Z，I、J、K中。
创建曲线：确定曲线在模型上的创建及显示。
步距：点与点之间的间隙。
扫描：是否选择触发方式或扫描方式进行测量。
安全平面：设置曲线测量时的起始安全点与结束安全点，单击按钮后只需在下拉菜单中选择方向且激活安全平面即可。
压深：在选择了扫描后，设置测量曲线时扫描测头的扫描压深参数。
测量：测量曲线并生成结果。
显示路径：显示列表栏中所有曲线的测量路径。
生成程序：生成测量程序。
停止：测量中点击该按钮停止操作。
退出：推出操作界面。
3） 先用“选择曲面”在模型上拾取被测平面，再点“拾取点”按钮，在模型上拾取一个点，点击“偏置曲线”按钮， 若修改曲线可在“偏置距离”框内设置参数后，再选择偏置方向“左或右”偏移。如（图3）所示：
（图3）
4） 再点击“选择曲线”按钮，在这条红色曲线上拾取点，当不勾选“封闭”时，默认为“开放”，在CAD模型上拾取三个点（起始、方向、终止），然后点击“创建曲线”按钮。如（图3和图4）所示：
A：封闭式：采两个点（方向、终止）。如（图3）所示：
（图3）
B：开放式：起始、方向、终止。如（图4）所示：
（图4）
5） 当路径无异常，若进行程序编辑时，可先点击“生成程序”再点击“测量”按钮。
6） 若在测量过程中，需要停止程序时，可点击“停止”按钮。
7） 点击“退出”按钮，可退出操作界面。
对于手机壳：
操作方法：
1、打开周边扫描界面，点击“选择曲面”按钮，弹出对话框，在模型上拾取需要测量的曲面。
2、设置安全平面和激活安全平面。将封闭前面的框框打勾。
3、点击“拾取点”按钮，然后在模型上拾取一个点的位置，即可出现矢量箭头。如下图所示：
4、点击“偏置曲线”按钮，则会显示一条封闭的曲线。
5、点击下方的“拾取点”按钮，在模型的曲线上拾取两个点。点击“创建曲线”按钮。
6、测量方式有两种，“触发”“扫描”，设置相关参数。
7、若选择“触发”测量方式，如下图所示：
8、若选择“扫描”测量方式，此测量方式只支持触发是扫描测头，如下图所示：
9、若路径无异常，可点击“生成程序”或“测量”按钮。
DEFINE CURVE 曲线-2
PATH PATH-1
CALL NORM-曲线-2
CURVE("曲线-2",6)
DEFINE PATH PATH-1
MOVE-TO(48.3406,101.330071,25.0000)
READ-PROBE-IJK(48.3406,101.330071,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(50.2058,102.049892,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(52.1289,102.596623,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(54.0938,102.965783,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(56.0842,103.154121,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(58.0835,103.160185,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(60.0751,102.984006,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(62.0421,102.626561,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(63.9685,102.091421,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(65.8380,101.382833,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(67.6351,100.506596,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(69.3584,99.461475,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(70.9656,98.272338,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(72.4577,96.941595,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(73.8222,95.480290,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(75.0478,93.900664,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(76.1242,92.215866,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(77.0424,90.439884,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(77.7949,88.587578,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(78.3752,86.674367,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(78.7788,84.716213,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(79.0021,82.729417,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(79.0432,80.730532,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(78.9020,78.736218,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(78.5792,76.763153,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(78.0778,74.827716,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(77.4022,72.946027,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(76.5555,71.134971,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(76.3691,70.780580,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(75.3315,69.071586,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(74.1423,67.464357,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(72.8116,65.972267,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(71.3503,64.607784,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(69.7707,63.382222,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(68.0859,62.305806,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(66.3099,61.387594,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(64.4576,60.635143,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(62.5444,60.054759,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(60.5862,59.651206,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(58.5994,59.427924,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(56.6005,59.386834,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(54.6062,59.528003,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(52.6332,59.850844,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(50.6977,60.352156,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(48.8160,61.027775,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(47.0050,61.874530,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(46.6506,62.060942,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(44.9416,63.098525,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(43.3344,64.287662,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(41.8423,65.618405,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(40.4778,67.079710,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(39.2522,68.659336,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(38.1758,70.344134,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(37.2576,72.120116,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(36.5051,73.972422,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(35.9248,75.885633,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(35.5212,77.843787,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(35.2979,79.830583,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(35.2568,81.829468,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(35.3980,83.823782,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(35.7208,85.796847,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(36.2222,87.732284,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(36.8978,89.613973,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(37.7445,91.425029,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(37.9309,91.779420,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(38.9685,93.488414,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(40.1577,95.095643,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(41.4884,96.587733,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(42.9497,97.952216,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(44.5293,99.177778,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(46.2141,100.254194,-8.8900,0.000000,0.000000,1.000000)
READ-PROBE-IJK(47.9901,101.172406,-8.8900,0.000000,0.000000,1.000000)
MOVE-TO(47.9901,101.172406,25.0000)
ENDDEF
ENDDEF
SUBROUTINE NORM-曲线-2
VPOINT-NORM(0,48.3406,101.330071,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(1,50.2058,102.049892,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(2,52.1289,102.596623,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(3,54.0938,102.965783,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(4,56.0842,103.154121,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(5,58.0835,103.160185,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(6,60.0751,102.984006,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(7,62.0421,102.626561,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(8,63.9685,102.091421,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(9,65.8380,101.382833,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(10,67.6351,100.506596,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(11,69.3584,99.461475,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(12,70.9656,98.272338,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(13,72.4577,96.941595,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(14,73.8222,95.480290,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(15,75.0478,93.900664,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(16,76.1242,92.215866,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(17,77.0424,90.439884,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(18,77.7949,88.587578,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(19,78.3752,86.674367,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(20,78.7788,84.716213,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(21,79.0021,82.729417,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(22,79.0432,80.730532,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(23,78.9020,78.736218,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(24,78.5792,76.763153,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(25,78.0778,74.827716,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(26,77.4022,72.946027,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(27,76.5555,71.134971,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(28,76.3691,70.780580,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(29,75.3315,69.071586,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(30,74.1423,67.464357,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(31,72.8116,65.972267,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(32,71.3503,64.607784,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(33,69.7707,63.382222,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(34,68.0859,62.305806,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(35,66.3099,61.387594,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(36,64.4576,60.635143,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(37,62.5444,60.054759,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(38,60.5862,59.651206,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(39,58.5994,59.427924,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(40,56.6005,59.386834,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(41,54.6062,59.528003,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(42,52.6332,59.850844,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(43,50.6977,60.352156,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(44,48.8160,61.027775,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(45,47.0050,61.874530,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(46,46.6506,62.060942,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(47,44.9416,63.098525,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(48,43.3344,64.287662,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(49,41.8423,65.618405,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(50,40.4778,67.079710,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(51,39.2522,68.659336,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(52,38.1758,70.344134,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(53,37.2576,72.120116,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(54,36.5051,73.972422,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(55,35.9248,75.885633,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(56,35.5212,77.843787,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(57,35.2979,79.830583,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(58,35.2568,81.829468,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(59,35.3980,83.823782,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(60,35.7208,85.796847,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(61,36.2222,87.732284,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(62,36.8978,89.613973,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(63,37.7445,91.425029,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(64,37.9309,91.779420,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(65,38.9685,93.488414,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(66,40.1577,95.095643,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(67,41.4884,96.587733,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(68,42.9497,97.952216,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(69,44.5293,99.177778,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(70,46.2141,100.254194,-8.8900,0.000000,0.000000,1.000000)
VPOINT-NORM(71,47.9901,101.172406,-8.8900,0.000000,0.000000,1.000000)
SUBEND