Research Of The Self-Security System On Earthquake Rescue Team

The subject is supported by special funds for public research of ministry of science and technology—"The access technology research of real-time dynamic information on rescue action".The project number is 200808063-01.The project participants are professor Guoyong, senior engineer Chen Weifeng and Pei Jingchuan, instructor Li Xuemei,post-graduate student Xie Qingming.China is one of the strongest active earthquake and the most serious calamity country in the world.Because the comlicated environment and special work place after the earthquake,the realization of recue team's self-security and location not only can improve their confidence,but also reduce the loss of state properties.So,both the advanced rescue equipments and effect self-protection for the rescue team have the great significance on improving the efficiency of emergency rescue,reducing the disaster loss and protecting the people's lives and property.The subject integrates the collection,processing and communication of data stream of the earthquake rescue team with the GPS position,picks out their heart rate and the content of combustible gas(which is mainly the LPG,CH4 and H2)through the data acquisition front-end,collects GPS location information from the GPS position system,inputs the data to the embedded system to process and storage it on real-time,transmits the data to rescue headquarters on time after coding it in CDMA module that would helpful for the more secure and more efficient resuce strategies made by rescue headquarters.When the content of combustible gas exceeds the default threshold,the embedded core processing system could alarm recue team to deviate from the dangerous place.And the rescue headquarters will return the correct GPS data to teamers through the CDMA wireless network which are amended by the rescue headquarters based on the error parameter came from the GPS Reference Station.These information will be displayed on the TFT screen.The self-security system includes four parts: the data acquisition front-end, GPS positioning system based on meter level,CDMA communication system and the embedded core processing system.The data acquisition front-end makes use of the well SNR , anti-jamming heart sensor and combustible gas sensor,and each of the signal conditioning circuits was designed independently.The GPS positioning system used the DP310 chip which is better anti-jamming and high precision,and ensured the positioning accuracy about 5 meters without the SA policy.The CDMA module could not only meet the data transmission both the life information and position information but also keep the voice communication,and operate the module with shortcuts way to save the precious rescue time and improve the effect of rescue team .The embedded core processing system took the S3C2410A as the core chip which received both the life and position data through RS-232C,processed the data efficiently and real-time.The flexible Bootloader VIVI was used to its hardware design and could erase and programming the Flash.The embedded Linux system kernel that is strong transplantation was used to the software design and permit the user expanding the function of the system constantly.The system has the merits of variety of storage options,wireless communication and transmission by the way of shortcut key, high integration, low power,small volume, light weight and easy to carry, has a good performance and prospect with the practical value applicated in the rescue course after earthquake.