JAVA：距离后方交会算法GUI实现

编译环境：

操作系统：Win8.1 64位

IDE平台：Visual Studio 2013 Ultimate

一、原理

在待测点P上观测距离距离S1，S2，S3,进而确定P的平面坐标：





二、代码实现

距离后方交会.java

package text;

import java.awt.*;
import java.awt.event.*;
import java.math.*;
import javax.swing.*;
import javax.swing.border.Border;

public class 距离后方交会 extends JFrame
{
public static final int TEXTAREA_ROWS = 20;
public static final int TEXTAREA_COLUMNS = 40;
public 距离后方交会()
{
final JTextField A_X = new JTextField("37477");
final JTextField A_Y = new JTextField("16307");
final JTextField B_X = new JTextField("37327");
final JTextField B_Y = new JTextField("16078");
final JTextField C_X = new JTextField("37163");
final JTextField C_Y = new JTextField("16046");
final JTextField S_1 = new JTextField("200");
final JTextField S_2 = new JTextField("200");
final JTextField S_3 = new JTextField("200");
JPanel northPanel = new JPanel();
JPanel WestPanel = new JPanel();
JLabel pic= new JLabel();
pic.setIcon(new ImageIcon("G:/workplace/距离后方交会/4.png"));
WestPanel.add(pic);
getContentPane().add(WestPanel, BorderLayout.WEST);
JPanel northPane2 = new JPanel();
//距离前方交会
northPane2.setLayout(new GridLayout(3, 4));
northPane2.add(new JLabel("A_X: ", SwingConstants.CENTER));
northPane2.add(A_X);
northPane2.add(new JLabel("A_Y: ", SwingConstants.CENTER));
northPane2.add(A_Y);
northPane2.add(new JLabel("B_X: ", SwingConstants.CENTER));
northPane2.add(B_X);
northPane2.add(new JLabel("B_Y: ", SwingConstants.CENTER));
northPane2.add(B_Y);
northPane2.add(new JLabel("C_X: ", SwingConstants.CENTER));
northPane2.add(C_X);
northPane2.add(new JLabel("C_Y: ", SwingConstants.CENTER));
northPane2.add(C_Y);
northPane2.add(new JLabel("S1: ", SwingConstants.CENTER));
northPane2.add(S_1);
northPane2.add(new JLabel("S2: ", SwingConstants.CENTER));
northPane2.add(S_2);
northPane2.add(new JLabel("S3: ", SwingConstants.CENTER));
northPane2.add(S_3);
Border etched = BorderFactory.createEtchedBorder();
Border titled = BorderFactory.createTitledBorder(etched, "距离后方交会");
northPanel.setBorder(titled);
getContentPane().add(northPane2, BorderLayout.NORTH);

final JTextArea textArea = new JTextArea(20,40);
JScrollPane scrollPane = new JScrollPane(textArea);

getContentPane().add(scrollPane, BorderLayout.CENTER);

// add button to append text into the text area

JPanel southPanel = new JPanel();

JButton insertButton = new JButton("计算P点坐标");
insertButton.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent event)
{
//坐标初始化
Double X1=Double.valueOf(A_X.getText()).doubleValue();
Double Y1=Double.valueOf(A_Y.getText()).doubleValue();
Double X2=Double.valueOf(B_X.getText()).doubleValue();
Double Y2=Double.valueOf(B_Y.getText()).doubleValue();
Double X3=Double.valueOf(C_X.getText()).doubleValue();
Double Y3=Double.valueOf(C_Y.getText()).doubleValue();
Double S1=Double.valueOf(S_1.getText()).doubleValue();
Double S2=Double.valueOf(S_2.getText()).doubleValue();
Double S3=Double.valueOf(S_3.getText()).doubleValue();

//A、B、P
Double D_AB=Math.sqrt(Math.pow((X1-X2),2)+Math.pow((Y1-Y2),2));
Double α_AB=Math.acos((D_AB*D_AB+S1*S1-S2*S2)/(2*D_AB*S1));
Double α_1=Math.atan(Math.abs(Y2-Y1)/Math.abs(X2-X1));
Double α_2=α_AB-α_1;
Double XP1=X1+S1*Math.cos(α_2);
Double YP1=Y1-S1*Math.sin(α_2);

//B、C、P
Double D_BC=Math.sqrt( Math.pow((X3-X2),2)+Math.pow((Y3-Y2),2));
Double α_BC=Math.acos((D_BC*D_BC+S2*S2-S3*S3)/(2*D_BC*S2));
Double α_3=Math.atan(Math.abs(Y3-Y2)/Math.abs(X3-X2));
Double α_4=α_BC-α_3;
Double XP2=X1+S1*Math.cos(α_4);
Double YP2=Y1-S1*Math.sin(α_4);

textArea.append("=====距离后方交会===="+"\n"+"参考值1:"+ "( " +XP1+","+YP1+")"
+  "\n"+"参考值2:"+"( " +XP2+","+YP2+")"
+  "\n"+"误差距离约:"+Math.round(miss(XP1,YP1,XP2,YP2))+"米");
//textArea.append("测试："+β_2);
}
public double miss(double XP1,double YP1,double XP2,double YP2){
return Math.sqrt(Math.pow((XP1-XP2),2)+Math.pow((YP1-YP2),2));
}
public double convert(String input){
Double a=Double.valueOf(input.split("°")[0]).doubleValue();
Double b=Double.valueOf(input.split("°")[1].split("'")[0]).doubleValue();
return a+b/60;
}
});

add(insertButton, BorderLayout.SOUTH);
pack();
}
}

Test.java

package text;

import java.awt.*;
import javax.swing.*;

public class Test
{
public static void main(String[] args)
{
EventQueue.invokeLater(new Runnable()
{
public void run()
{
JFrame frame = new 距离后方交会();
frame.setTitle("距离后方交会");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setVisible(true);
}
});
}
}

三、运行结果

下载：距离后方交会算法JAVA工程包