A low-power high precision self-testing data acquisition system for a large seismic exploration grid

2005 ◽  
Author(s):  
M. Kejariwal
Keyword(s):  
Low Power ◽  
Data Acquisition ◽  
High Precision ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Seismic Exploration ◽  
Self Testing ◽  
Testing Data

Design of the A/D Conversion Circuit Based on ARM for the Time-Difference Method Ultrasonic Flowmeter

2011 ◽  
Vol 383-390 ◽  
pp. 516-523
Author(s):  
Xing Hong Zhang ◽  
Hui Zhang ◽  
Xi Hou Chen ◽  
Xian Quan Wang ◽  
Ji Qin Feng
Keyword(s):  
High Resolution ◽  
Low Power ◽  
Data Acquisition ◽  
High Precision ◽  
Difference Method ◽  
Data Acquisition System ◽  
Time Difference ◽  
Ultrasonic Flowmeter ◽  
Advanced Technology ◽  
Acquisition System

Because the high precision ultrasonic flowmeter has shortcomings of expensive, the A/D conversion circuit based on ARM for the time-difference method ultrasonic flowmeter is designed. On the basis of time-difference method ultrasonic flowmeter theory and the domestic and overseas advanced technology, a cost-effective low-power 12-bit ADC12DL040 chip and ARM processor LPC2138 are chosen for the design. According to the data acquisition system issues of the time- difference method ultrasonic flowmeter, the two-channel 12-bit low-power monolithic CMOS analog-digital conversion chip is adopted to design the nanosecond-level high-resolution data acquisition system. In this paper, the A/D chip peripheral pin circuit design is given, hardware structure diagram and software flowchart are also given. The input frequency of ultrasonic signal is 400 kHz and the sampling frequency is 8MHz.The experimental results indicated that the designed A/D conversion circuit is able to accomplish the high-speed and high-resolution ultrasonic echo signal sampling; the minimum resolution time of A/D conversion circuit is 0.305ns. The physical map of A/D conversion circuit for the time-difference method ultrasonic flowmeter is presented. The design of A/D conversion circuit for time-difference method ultrasonic flowmeter not only lower the production cost, but also lays a solid foundation for the research of low-cost and high-precision time-difference method ultrasonic flowmeter.

scholarly journals Development of a distributed hybrid seismic–electrical data acquisition system based on the Narrowband Internet of Things (NB-IoT) technology

2019 ◽  
Vol 8 (2) ◽  
pp. 177-186 ◽  
Author(s):  
Wenhao Li ◽  
Qisheng Zhang ◽  
Qimao Zhang ◽  
Feng Guo ◽  
Shuaiqing Qiao ◽  
...  
Keyword(s):  
Internet Of Things ◽  
Data Acquisition ◽  
High Precision ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Geophysical Prospecting ◽  
Long Distance ◽  
Data Acquisition Board ◽  
Acquisition Processes ◽  
Electrical Data

Abstract. The ambiguity of geophysical inversions, which is based on a single geophysical method, is a long-standing problem in geophysical exploration. Therefore, multi-method geophysical prospecting has become a popular topic. In multi-method geophysical prospecting, the joint inversion of seismic and electric data has been extensively researched for decades. However, the methods used for hybrid seismic–electric data acquisition that form the base for multi-method geophysical prospecting techniques have not yet been explored in detail. In this work, we developed a distributed, high-precision, hybrid seismic–electrical data acquisition system using advanced Narrowband Internet of Things (NB-IoT) technology. The system was equipped with a hybrid data acquisition board, a high-performance embedded motherboard based on field-programmable gate array, an advanced RISC machine, and host software. The data acquisition board used an ADS1278 24 bit analog-to-digital converter and FPGA-based digital filtering techniques to perform high-precision data acquisition. The equivalent input noise of the data acquisition board was only 0.5 µV with a sampling rate of 1000 samples per second and front-end gain of 40 dB. The multiple data acquisition stations of our system were synchronized using oven-controlled crystal oscillators and global positioning system technologies. Consequently, the clock frequency error of the system was less than 10−9 Hz at 1 Hz after calibration, and the synchronization accuracy of the data acquisition stations was ±200 ns. The use of sophisticated NB-IoT technologies allowed the long-distance wireless communication between the control center and the data acquisition stations. In validation experiments, it was found that our system was operationally stable and reliable, produced highly accurate data, and it was functionally flexible and convenient. Furthermore, using this system, it is also possible to monitor the real-time quality of data acquisition processes. We believe that the results obtained in this study will drive the advancement of prospective integrated seismic–electrical technologies and promote the use of IoT technologies in geophysical instrumentation.

scholarly journals Development of high-precision distributed wireless microseismic acquisition stations

2018 ◽  
Author(s):  
Shuaiqing Qiao ◽  
Hongmei Duan ◽  
Qisheng Zhang ◽  
Qimao Zhang ◽  
Shuhan Li ◽  
...  
Keyword(s):  
Data Acquisition ◽  
High Precision ◽  
Oil And Gas ◽  
Data Communication ◽  
Microseismic Monitoring ◽  
Acquisition System ◽  
Seismic Exploration ◽  
High Signal ◽  
Control Board ◽  
High Data

Abstract. In recent years, owing to the shortage of oil and gas resources and increased difficulty in mining, traditional (wired) microseismic monitoring equipment has been unable to meet the needs of energy exploitation. Therefore, it is necessary to develop new high-precision seismic exploration and data acquisition systems. In this study, we combined advance acquisition systems with wireless technology to develop a new wireless microseismic acquisition system. The hardware circuit of the acquisition system mainly included a data acquisition board and a main control board. High-precision analog-to-digital conversion and digital filtering technologies were used to provide data with high signal-to-noise ratios, resolution, and fidelity to the acquisition stations. Key technologies were integrated into the ARM of the main control board. Reliable GPS technology was employed to realize synchronous acquisitions among various acquisition stations, and WIFI technology was used to achieve wireless data communication between acquisition stations and the central station, thus improving the data transmission speed and accuracy. After conducting a series of evaluation tests, it was found that the system was stable, convenient to use, and had high data accuracy, therefore providing significant support for the solution to problems encountered in current oil and gas exploration processes, such as the complicated environment and inconvenient construction.

The Interface Design of TMS320C6713 and AD7679

2014 ◽  
Vol 800-801 ◽  
pp. 741-744
Author(s):  
Zhi Dong Wu ◽  
You Zheng Cui ◽  
Di Pan
Keyword(s):  
Data Acquisition ◽  
High Precision ◽  
Software Design ◽  
Interface Design ◽  
High Speed ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Specific Function ◽  
Interface Circuit

In order to meet the demands of the high precision and high speed, the interface design of TMS320C6713 and AD7679 is widely used in data acquisition system. In this paper, the interface design of TMS320C6713 and AD7679 is introduced, including the design of the interface circuit and the software design of the interface. The configuration of every register of McBSP is also expounded, including configuration method and specific function.

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