Design And Implementation Of Low Power Broadband Seismic Recorder

In recent years,with the steady improvement of people’s living standards and the acceleration of industrialization,the country’s demand for energy has increased year by year.In order to meet the huge energy gap,deeper exploration of mineral resources has become the primary task of geological work.In addition,due to the fact that In addition,China is located between two major seismic zones,geological disasters caused by unstable geological structures each year has brought huge losses to China.In order to carry out geological disaster monitoring and early warning,it is also necessary to have a deeper understanding of the underground structures in China.As one of the most effective means of geophysical exploration,seismic exploration method has been widely used in mineral resources exploration,geological structure exploration and other fields for decades.More and more attention has been paid to the analysis of underground structures by natural seismic method due to its advantages of large depth of detection.Due to the wide range of natural seismic signals,it is necessary to collect and store the seismic signals with a special wide-band seismic recorder.At present,domestic seismic observation stations mostly use expensive imported equipment,but domestic equipment has not been widely used due to high power consumption.This paper designs a low power broadband seismic data recorder,which is divided into three boards: interface board,main control board and acquisition board.The interface board mainly provides a wired physical interface between the seismic recorder and peripheral devices.The main function of the main control board is power management and system process control by the main controller.The acquisition board is mainly responsible for converting analog differential signals into digital signals and caching them.Low power design is mainly reflected in two aspects: circuit design and program design.In the aspect of circuit,power consumption can be reduced by reasonably selecting low power chips and reducing the number of system components.In terms of program design,some circuits are controlled by the main controller through power management technology so as to reduce the power consumption of the system.Due to the sporadic of natural earthquakes,most of the natural seismic observation data is seismic pendulum and the seismic recorder’s own noise.The seismic data is processed using a seismic wave first arrival picking technique based on the low frequency signal ratio coefficient.Seismic data is separated from a large amount of observation data and saved.This method can improve system storage efficiency.For security reasons,there is no human-computer interaction interface on the seismic data recorder.This paper proposes a wireless parameter setting technology that allows the operator to enter the parameter settings by using the handheld terminal’s own browser to access the IP address.Set the interface and perform related operations on the instrument.In this paper,the prototype is made and tested for acquisition and power consumption.The test results show that compared with the first-generation broadband seismic recorder of jilin university,the low-power prototype designed in this paper reduces the consumption of electric energy on the premise of basically maintaining the acquisition performance,and the instrument power consumption is only 2.788 w,reaching the expected design goal.