Large dynamic range data acquisition system for time-domain electromagnetic interference (TDEMI) measurement receiver

2019 ◽  
Vol 90 (1) ◽  
pp. 015105 ◽  
Author(s):  
Hao Zeng ◽  
Jian Gao ◽  
Peng Ye ◽  
Lianping Guo ◽  
Ke Liao
Keyword(s):  
Data Acquisition ◽  
Time Domain ◽  
Electromagnetic Interference ◽  
Dynamic Range ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Range Data ◽  
Large Dynamic Range ◽  
Time Domain Electromagnetic

scholarly journals Identification of dominant error parameters in spectrum measured by TDEMI system

ACTA IMEKO ◽  
2015 ◽  
Vol 4 (1) ◽  
pp. 61
Author(s):  
Miroslav Kamenský ◽  
Karol Kovác
Keyword(s):  
Experimental Data ◽  
Mathematical Model ◽  
Time Domain ◽  
Electromagnetic Interference ◽  
Dynamic Range ◽  
Measuring Systems ◽  
Analog To Digital ◽  
Time Domain Electromagnetic ◽  
Parallel Input ◽  
Theoretical Results

Multiresolution analog-to-digital converters (MRADC) are usually used in Time Domain ElectroMagnetic Interference (TDEMI) measuring systems for very fast signal sampling with a sufficient dynamic range. The properties of the spectrum measured by the TDEMI system influenced by imperfections in the MRADC are analyzed in this paper. Errors are caused by imperfect matching of the offset and gain and phase of the circuits used in parallel input channels typical for the MRADC. For deep analyses of MRADC behavior, a precise mathematical model has been created using the concept of additive error pulses. Furthermore, a dedicated process of the identification of discrepancy parameters from experimental data is proposed. Identified parameters enter the expressions of the model and enable side to side comparison of experimental and theoretical results.

scholarly journals Development of a New Centralized Data Acquisition System for Seismic Exploration

2019 ◽  
Author(s):  
Feng Guo ◽  
Qisheng Zhang ◽  
Qimao Zhang ◽  
Wenhao Li ◽  
Yueyun Luo ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Seismic Data ◽  
Dynamic Range ◽  
Sampling Rate ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Seismic Exploration ◽  
Seismic Data Acquisition ◽  
Electrical Prospecting ◽  
And Migration

Abstract. Seismic exploration equipment has developed rapidly over the past few decades. One such piece of equipment is a centralized seismograph, which plays an important role in engineering, so improving its performance is of great scientific significance. However, there is still a gap between seismic exploration equipment that is inde-pendently developed by China and that developed worldwide; this gap needs to be bridged via the advancements made in technology. In this research, the core part of general seismic data acquisition devices is packaged to develop a centralized seismic data acquisition system (Named as CUGB-CS48DAS) that has independent operating ability and high scalability, which can be used for engineering seismic and electrical prospecting. The low-power-consumption computer of the system comprises a 24-bit Σ-△ modulation A/D converter and 48 sampling channels with an optional sampling rate of 50 Hz to 64 KHz, crosstalk rejection ratio ≥ 80 dB, dynamic range ≥ 120 dB, frequency response range of DC to 16 KHz, synchronization accuracy better than 200 ns, and data transmission speed ≥ 90 Mbps. With regard to the host computer, the ar-chitecture of the control software is smart, and it can integrate the multiple functions of data acquisition, preprocessing, and self-testing; clear interfaces reduce the com-plexity of development and migration.

scholarly journals Development of a New Centralized Data Acquisition System for Seismic Exploration

2019 ◽  
Author(s):  
Feng Guo ◽  
Qisheng Zhang ◽  
Qimao Zhang ◽  
Wenhao Li ◽  
Yueyun Luo ◽  
...  
Keyword(s):  
Data Acquisition ◽  
Seismic Data ◽  
Dynamic Range ◽  
Sampling Rate ◽  
Field Tests ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Seismic Exploration ◽  
Electrical Method ◽  
Seismic Data Acquisition

Abstract. Seismic exploration equipment has developed rapidly over the past few decades. One such piece of equipment is a centralized seismograph, which plays an important role in engineering, so improving its performance is of great scientific significance. In this research, the core part of general seismic data acquisition devices is packaged to develop a centralized seismic data acquisition system (Named as CUGB-CS48DAS) that has independent operating ability and high scalability, which can be used for seismic exploration in varies engineering usage. Furthermore, by extending and modifying the acquisition circuit and corresponding software, the function of electrical method data acquisition has also been achieved. Thus, the proposed CUGB-CS48DAS makes it possible for joint exploration of seismic and electrical data in a single acquisition station, which is implicitly of great convenience in engineering prospecting. The low-power-consumption computer of the system comprises a 24-bit Σ-△ modulation A/D converter and 48 sampling channels with an optional sampling rate of 50 Hz to 64 kHz, dynamic range ≥ 120 dB, synchronization accuracy better than 200 ns. With regard to the host computer, the architecture of the control software is smart, and it can integrate the multiple functions of data acquisition, preprocessing, and self-testing; clear interfaces reduce the complexity of development and migration. Field tests was implemented to prove that the system is stable and convenient to use, and the performance could meet the demand of high-precision joint exploration.

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