Development Of A Network Data Acquisition And Management System For Superconducting Gravimeter

Continuous gravity measurement is an important means of surface gravity monitoring and plays an important role in China’s inland earthquake monitoring.The superconducting gravimeter is an instrument that can measure continuous gravity by measuring the voltage value.It is deployed in some stations of China’s seismic system because of its high measurement accuracy,good continuity and small error.It is the main measuring instrument for continuous gravity monitoring.one.The original superconducting gravimeter data output only supports serial port output,and the output data can only be transmitted locally for a short distance,but not for long-distance network transmission,which has caused great difficulties for the work of the seismic system and scientific researchers.In order to solve this problem,it is necessary to use a technology or method to transform the superconducting gravimeter into a network,so that the data of the superconducting gravimeter can be transmitted through the seismic system network and provided to remote users.Aiming at this problem,this paper develops a set of superconducting gravimeter network data acquisition management system software to realize localization and remote network data acquisition,storage and transmission.The main work content is as follows:(1)Through the investigation of the deployment environment of the superconducting gravimeter,a C/S architecture model was adopted,combined with C# development language,serial communication technology,Socket technology,and Measurement Studio virtual instrument software technology,a pure software superconducting gravimeter was proposed Design scheme of network data acquisition management system.In the design scheme,this system is divided into two subsystems:two subsystems of field end software and remote end software.(2)The field-side software was developed and deployed on the field-side host near the superconducting gravimeter,which can realize functions such as serial port data collection,data storage,real-time monitoring,video monitoring,and data forwarding.This software can be used not only as the serial port host computer software of the gravimeter field end,to realize the local monitoring of gravity data;but also as a network data storage and forwarding server,to transmit the gravity and video data of the field end to the remote end software.(3)The remote-end software has been developed and deployed on the host computer connected to the intranet of the seismic system,which can realize functions such as networked data collection,data storage,gravity data processing,dynamic data monitoring,data playback,and remote video monitoring.(4)In order to improve the efficiency of network transmission and improve the real-time performance of remote video monitoring,the JEPG lossy compression algorithm is designed and implemented in the process of video image data transmission.(5)After the development of the system is completed,the functional test of the system is carried out by using the method of black box testing to ensure that the system can run for a long time.The test results are good,meeting the original design requirements,ensuring that the superconducting gravimeter can be used under the intranet of the seismic system,and realizing the data network and remote data transmission of the superconducting gravimeter.