Research On Embedded Remote Groundwater-Level For Earthquake Forecast

Abnormality of groundwater-level is considered as one of the most important forewarnings for earthquakes. Therefore, monitoring of groundwater-level data has great significance for earthquake forecast. Chinese observation ney based on groundwater is the largest in the world and we have nearly 1000 observation wells. They produce millions of observation data every day. But the level of the data management techniques is very low. The data is transmitted mainly by letters and telephones. Part of the data is input by computer artificially. All the bove hinder usage effectiveness and preservation of the data. Thus, it is necessary to develop a remote monitoring system for data auto-collection and auto-tansmission.After consulting many related documents in both china and foreign countries, I design a low-cost remote monitoring system combined GPRS communications with embedded system, which is based on former research.The system takes Samsung S3C2410A ARM920T micro-processor as CPU, embedded Linux as operating system and GPRS as wireless communication technology for hardware. S3C2410A micro-processor transfers water-level data, coming from exterior sensor, to the serial port of the micro-processor. S3C-2410A micro-processor connects GPRS module with serial port. S3C2410A sends data to GPRS server by GPRS module, and then the server re-sends the data to the computer of the control centen, whose IP address is given in the water-level data by internet.The thesis completes the design for remote embedded monitoring system in both software and hardware. The work is as follows:The haraware development, based on S3C2410A microprocessor, includes: storage module, which adopts MCP FLASH storage, intergrates 32M NAND FLASH and 16M SDRAM. So it provides enough storage space for the system. data-collection module. It is made up of digital water-level sensor and 10-bit analog to digital converter with 8-channel analog inputs. data-transmission module.According to the characteristic of S3C2410A, I revised the kernel source code of Linux operation system and complined parts of kernel sourcr code, in order to guarantee the support to hardware system. Allocating and editing the kernel of Linux operation, I built a corresponding embedded Linux platform.Based on the software platform, I developed a peripheral hardware driver which is subordinate to the embeadded Linux. The application program realizes auto-collection and auto-transmission of watr-level data.It is proved that the remote embedded monitoring system can meet the demand of auto-collection and auto-transmission by fluid observation net. The design of the system not only can save expenses of investment influid observation net, but also guarantee the real-time of ground water-level data transmission and preservation. Therefore, it has important researching significance and broad application prospect.