A microprocessor‐based controller and data acquisition system for LaCoste and Romberg air‐sea gravity meters

Geophysics ◽  
1985 ◽  
Vol 50 (5) ◽  
pp. 840-845 ◽  
Author(s):  
H. D. Valliant ◽  
J. Halpenny ◽  
R. V. Cooper
Keyword(s):  
Data Acquisition ◽  
Magnetic Tape ◽  
Gravity Data ◽  
Deep Ocean ◽  
Data Acquisition System ◽  
Digital System ◽  
Acquisition System ◽  
Straight Line

A microprocessor‐based controller and data acquisition system for LaCoste and Romberg dynamic gravity meters has been designed, tested, and is now operationally functional. The system controls the motion about the three axes of the stable platform and the gravity meter, as well as acquiring gravity data and storing it on magnetic tape. Output format is compatible with LaCoste and Romberg format. Extensive testing has assured that the digital system functions correctly. Recent deep‐ocean surveys using the new straight‐line meter (SL-1) in conjunction with the new electronics, have resulted in unadjusted cross‐over differences of 1.35 mGal.

Design and Implement of Data Acquisition System Based on Reconfigurable Computing

2012 ◽  
Vol 546-547 ◽  
pp. 1393-1397
Author(s):  
Zhi Wen Xiong ◽  
Chen Guang Xu ◽  
Hong Zeng
Keyword(s):  
Data Processing ◽  
Data Acquisition ◽  
Reconfigurable Computing ◽  
Rapid Development ◽  
Physical Property ◽  
Data Acquisition System ◽  
Digital System ◽  
Working Environment ◽  
Acquisition System ◽  
Computing Technology

Data acquisition begins with the physical phenomenon or physical property to be measured. Examples of this include temperature, gas pressure, and light intensity, and force, fluid flow, regardless of the type of physical property to be measured. Physical property converted into digital, and then by the computer for storage, processing, display or printing process, the corresponding system is called data acquisition system. With the rapid development of computer technology, data acquisition systems quickly gained popularity. A variety of products based on digital technology have been created. Digital System spread quickly; it’s mainly the following two advantages: the first is the digital processing flexible and convenient; the second is a digital system is very reliable. The main idea of Reconfigurable computing technology [1] is using the FPGA [2][3] allows the system has a dynamically configurable capacity, suitable for harsh environment applications, improve the speed of data processing. By the use of dynamic reconfigurable FPGA devices can be realized on the hardware logic function modification, application of reconfigurable computing technology can improve the speed of data processing. Data acquisition system is widely applied in many fields, and often used the abominable working environment place. The reconfigurable computing technology, can greatly improve the data acquisition system reliability and safety. The paper introduces a kind of multi-channel data acquisition system based on USB bus and FPGA, the factors affecting the performance of system are discussed, and describes how to use reconfigurable computing technology to improve the efficiency of data acquisition system while reduce energy consumption. The system in this paper uses AD's AD9220, ALTERA's EP1C6-8 and IDT's IDT70V24, Cypress’s CY7C68013.

Multiplexed Recording of Multiple Events

1970 ◽  
Vol 31 (2) ◽  
pp. 349-350 ◽  
Author(s):  
David I. Mostofsky
Keyword(s):  
Data Acquisition ◽  
Magnetic Tape ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Multiple Events

Some general considerations of a magnetic tape based data acquisition system are summarized, together with a description of a representative ten-event assembly. Both hardware and software are noted. Suggested computer routines are outlined.

Numerical Analysis of Analog Signals for Data Processing in Electrocardiology

1965 ◽  
Vol 04 (04) ◽  
pp. 189-195 ◽  
Author(s):  
R. Koechlin
Keyword(s):  
Numerical Analysis ◽  
Data Processing ◽  
Data Acquisition ◽  
Magnetic Tape ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Medical File ◽  
Analogue Signal ◽  
Analog Signals ◽  
Oscilloscope Screen

The principle of a new data acquisition system is given for the numerical analysis of a visualized analogue signal. The operator chooses the sequence of interest. A 1/4 inch magnetic tape loop repeats the sequence on an oscilloscope screen. With numerical knobs he can either obtain automatically the full series of coded samples within the limits of a chosen zone of interest, or pick up the point by point coordinates of the only sample or segment he expects to be pertinent. The selected samples are brightened on the screen. The data are immediately made available in printed numbers to the physician for the patient’s medical file, or on punched tape for further processing and for Telex transmission.

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