方法如下：

方法1：通过找圆工具上的点求解隔离纸边缘点-钢壳边缘点的距离。

#region namespace imports
using System;
using System.Collections;
using System.Drawing;
using System.IO;
using System.Windows.Forms;
using Cognex.VisionPro;
using Cognex.VisionPro.ToolBlock;
using Cognex.VisionPro3D;
using Cognex.VisionPro.PMAlign;
using Cognex.VisionPro.CalibFix;
using Cognex.VisionPro.Blob;
using Cognex.VisionPro.Caliper;
using Cognex.VisionPro.Dimensioning;
using System.Linq;
using System.Threading;
#endregion

public class CogToolBlockAdvancedScript : CogToolBlockAdvancedScriptBase
{
   
  #region Private Member Variables
  private Cognex.VisionPro.ToolBlock.CogToolBlock mToolBlock;
  #endregion

  /// <summary>
  /// Called when the parent tool is run.
  /// Add code here to customize or replace the normal run behavior.
  /// </summary>
  /// <param name="message">Sets the Message in the tool's RunStatus.</param>
  /// <param name="result">Sets the Result in the tool's RunStatus</param>
  /// <returns>True if the tool should run normally,
  ///          False if GroupRun customizes run behavior</returns>
  ///
  #region

  CogGraphicCollection gc;
  CogGraphicCollection gc1;
  CogGraphicLabel label1;
  CogGraphicLabel label2;
  CogGraphicLabel label3;
  CogGraphicLabel label4;
  CogGraphicLabel label5;
  CogGraphicLabel label6;
  CogRectangleAffine rect;


  //  int s = 0;

  //计算圆心度所需变量
  double Min_Distance = 0.0;
  double Max_Distance = 0.0;
  //double Minus_Value = 0;
  //double Point_CenterD = 0;

  //double InputRMSCircle = 0;

  //  int s = 0;

  #endregion

  public override bool GroupRun(ref string message, ref CogToolResultConstants result)
  {
   
    // To let the execution stop in this script when a debugger is attached, uncomment the following lines.
    //#if DEBUG
    //if (System.Diagnostics.Debugger.IsAttached) System.Diagnostics.Debugger.Break();
    //#endif

    #region 显示运行

    mToolBlock.Outputs["Result"].Value = 1;
    //mToolBlock.Outputs["Area"].Value = 0;
    mToolBlock.Outputs["bStatus"].Value = false;
    //mToolBlock.Outputs["DistanceMax"].Value = 0;
    //mToolBlock.Outputs["DistanceMin"].Value = 0;
    mToolBlock.Outputs["GraphicCollection"].Value = null;
    mToolBlock.Outputs["GraphicCollection1"].Value = null;

    //数组下标对应0 1 2 3 4：产品定位NG或OK 两圆距离计算OK或NG  卡尺燕尾判断OK或NG
    int[] AllResult = new int[4];

    bool DecideResult = false;

    CogFindCircleTool Pat1 = (CogFindCircleTool) mToolBlock.Tools["外圆定位"];

    CogFixtureTool Fix = (CogFixtureTool) mToolBlock.Tools["矫正坐标系"];

    CogFindCircleTool FindCircle = (CogFindCircleTool) mToolBlock.Tools["外圆"];

    CogFindCircleTool FindCircle1 = (CogFindCircleTool) mToolBlock.Tools["隔离管外圆"];

    CogDistancePointPointTool PointP_Distance = (CogDistancePointPointTool) mToolBlock.Tools["两圆距离"];

    CogCaliperTool YanWeiCaliper = (CogCaliperTool) mToolBlock.Tools["卡尺燕尾"];

    if (gc == null) gc = new CogGraphicCollection(); gc.Clear();
    if (gc1 == null) gc1 = new CogGraphicCollection(); gc1.Clear();
    if (label1 == null) label1 = new CogGraphicLabel();
    if (label2 == null) label2 = new CogGraphicLabel();
    if (label3 == null) label3 = new CogGraphicLabel();
    if (label4 == null) label4 = new CogGraphicLabel();
    if (label5 == null) label5 = new CogGraphicLabel();
    if (label6 == null) label6 = new CogGraphicLabel();

    if (rect == null) rect = new CogRectangleAffine();

    label1.Font = new Font("宋体", 16);
    label1.SelectedSpaceName = "#";
    label1.Alignment = CogGraphicLabelAlignmentConstants.BaselineLeft;
    label2.Font = new Font("宋体", 16);
    label2.SelectedSpaceName = "#";
    label2.Alignment = CogGraphicLabelAlignmentConstants.BaselineLeft;
    label3.Font = new Font("宋体", 16);
    label3.SelectedSpaceName = "#";
    label3.Alignment = CogGraphicLabelAlignmentConstants.BaselineLeft;
    label4.Font = new Font("宋体", 16);
    label4.SelectedSpaceName = "#";
    label4.Alignment = CogGraphicLabelAlignmentConstants.BaselineLeft;
    label5.Font = new Font("宋体", 16);
    label5.SelectedSpaceName = "#";
    label5.Alignment = CogGraphicLabelAlignmentConstants.BaselineLeft;
    label6.Font = new Font("宋体", 16);
    label6.SelectedSpaceName = "#";
    label6.Alignment = CogGraphicLabelAlignmentConstants.BaselineLeft;

    Pat1.InputImage = (CogImage8Grey) mToolBlock.Inputs["InputImage"].Value;
    Pat1.Run();

    if (Pat1.Results != null && Pat1.Results.Count > 0)
    {
   
      label1.SetXYText(100, 50, "产品定位OK");
      label1.Color = CogColorConstants.Green;
      gc.Add(label1)