被困灾民精确定位检测及计算方法

灾区救助过程中被困灾民位置的确定是关系到灾民生命安全的一个重要问题．如何在尽可能短的时间内找到灾民的确定位置，对于挽救灾民的生命和节省救助的人力物力有着十分重要的意义．作者在本文中提出了一种利用地面的四个声波检波器，当被埋在倒塌建筑下的幸存灾民的敲击声被检波器检测到时，用声波的四个到达时间和检波器的位置的关系，通过海伦公式的运用。迅速得到被埋灾民的位置．试算结果表明，该方法是一种精度较高的方法．

The Method of Precision Orientation Detecting and Analysis for Searching the Siege People at Calamity Area

Ascertain the location of the siege people at calamity area is important to the safety of people. How to find the location of the siege people in a short time is essential to saving the people in help and saving up the precious time. This paper puts forward a method utilizing four sound waves geophones located on the earth. When checking the thumping sound from the breakdown building ,we can use the relation between the four arrival times and the location of the geophones to ascertain the location of the siege people in time by geometry calculation. The test calculation results show that the method's precision degree is satisfying.