In the rescue were buried in the ruins are, we see or hear news of the largest technology and equipment is a life detector, Hu Jintao, Wen Jiabao, and other state leaders in his speech also encouraged the vast numbers of rescue personnel to fully make good use of this High-tech equipment. After the earthquake, as time goes by, more and more weak signs of life, calling on people and dogs can not be heard to find survivors of a weak atmosphere. In order to timely firefighters found under the ruins of the wounded, the extensive use of life detector. This detector, can detect human unable to reach the region is still trapped officers, the implementation of rescue.
May 15 morning, after the daring march, day and night, fly to Sichuan Guangyuan reinforcement of Xiamen fire rescue team finally arrived at the disaster serious Qingchuan Xian City. In the ensuing immediate relief, life detectors and radar detector in the visual search and rescue process put in their use, among the ruins, radar and the probe's sharp sense of smell to find any slightest possibility of survival. The results, search and rescue personnel using a life-detection instrument in the three collapsed in the ruins were found four survivors. Yang Ping Street in the four-storey building collapsed in ruins, a tenacious survival of the two days of men. After the earthquake, the building almost all the officers escaped, only one man. His wife and neighbors all thought that man had died, they thought not, even on the life detector can to show signs of life. After detection, identified the approximate location of life, team members began calling excavator to assist rescue.
Radar detection of life-is a new thing, in the Tangshan earthquake relief work has not happened, but in recent years it appears a novel apparatus, is now the world's most advanced life-saving tools are buried ruins. 2005, the United States as super-security system introduced radar detector life, it is the Massachusetts Institute of Technology physicist David. I Sili use ultra-wideband radar technology to produce life-saving equipment.
Radar detection of life-is ultra-wideband signal sent by the Inflatable tunnels transmitter, receiver detection signal back to the receiver and read the receiver for the signal processing algorithms and computer components. Radar detection of life-is actually a human breathing and movement detection equipment. Radar signal transmitter for launching electromagnetic signals, to a certain space to be scanned, the receiver to receive the signal reflection and to return to signal processing algorithms. If the exploration to maintain static, the return signal is the same. If the target moving, the signal differences. Through the different time to accept the signal, can determine whether the targets are moving. As the frequency of lower respiratory, general 1-2 times per second, will be able to breathe sports and other high frequency of separate campaigns.
As life radar detector does not require drilling, cable and layout of Inflatable tunnels the environment for the conduct of silent treatment, it becomes easy to search and rescue work. Radar detection of life-detection range of up to 30-50 meters, penetrating entities brick wall thickness is 2 to 3 meters.
In addition to the now commonly used radar life detectors, there are also using infrared light waves and visualization methods such as direct search of the buried life detectors. Life optical detector, the ruins can be seen clearly. Life thermal infrared detector, in the dark can also work. However, the lives of these early detection system to detect the scope is very limited. Yu Xianzhe in moving into the camera lens or the sensor's field of vision, the only light on the detection system to the police. Based on the sound detection system significantly limited by distance, Inflatable tunnels obstacles, Can Yuan, but also decided to Yu Xianzhe still strong and clear voice to be issued.