Landslide Rescue Research And Design Of Wireless Wearable Search System For Help

In order to improve the success rate of rescue and reduce casualties, thesis landslide rescue wearable wireless call and search system in landslides and other buried disasters.A wearable device which has the personal identification numbers and heart rate and body temperature detection module is equipped to persons residing or entering the landslide area,while rescue workers are equipped with rescue equipments.For this reason, according to the electromagnetic characteristics of the landslide material, establishment of a conductive medium of Maxwell’s equations, analysis of radio wave propagation characteristics, estimate the propagation distance, Argumentationthe the feasibility of system.According to the provisions of ISM band occupied and landslide site monitoring system, the paper determined the point of the system operating frequency 433 MHz.G-shaped design of the main part of the radiation omnidirectional microstrip antenna miniaturization to make the device easily to take. After assembling basic hardware circuit system of wearable devices, the paper has improved them in low power consumption and Miniaturization technology. According to the source of energy consumption systems, the control chip and peripheral circuits are used in low-power technology, selection and arrangement of the PCB components are integrated into a wearable device features.System design software programs usually make the device periodically enters the standby state and the receiving state.When the landslide occurred, rescue personnels issued to them for help turn instruction by rescue equipment, which is received into the launch state of distress equipment,including wearer issued ID number, heart rate and body temperature in real-time information.Search equipment receiving a series of SOS message from help devices. through a dynamic process, after adding and deleting, information items not repeated is displayed, as a reference to the rescue.Software program using the control chip low-power control function,and the design ratio of standby time and working hours, which ensure the functionality of the device to further reduce energy consumption and make wearable devices for help get a longer standby time.For system tests, similar formula is derived from landslide electrical systems and operating frequency.Alternative water submerged landslide buried Experimental results show that the hardware and software to work correctly, search and rescue equipment capable of receiving the distress signal information and good.The maximum communication distance between devices is3.8m, after a similar formula is converted to the maximum communication distance of the landslide is about 7.6m,and the distance to the buried disaster relief meaningful.When vital signs module loss of function, the device can still transmit SOS messages containing the ID number of the wearer.Wearable wireless call system to search for the landslide disaster relief provides a new technical means.