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BROADBAND SIGNAL RECORDER WITH REFERENCE TO SPACE-TIME COORDINATES FOR ELECTRICAL EXPLORATION GEOPHYSICAL WORKS
Abstract
The paper solves the problem of creating a device for electrical measurements for the purpose of geological research. There are a large number of data acquisition and processing systems, analog-to-digital converters (ADC) and other serial processing technical means for measuring and storing analog electrical data with their preliminary conversion into digital readings. This is done for the purpose of subsequent processing of these signals, which allows calculating some characteristics, which are then used to calculate and model the characteristics of soil, rocks, etc. These electrical measurements for geological and geophysical surveys require the reference of the readings to an absolute grid of spatial coordinates and to absolute time. Such a binding is carried out using special communication units with global satellite systems GPS and GLONASS. These units are independently capable of communicating with the indicated satellite systems to obtain spatial and temporal absolute coordinates. It is also important to synchronize the received readings to the specified absolute time scale. It is also necessary to provide wide bandwidth, high conversion accuracy, autonomy of work according to a predetermined program or work with operator control, as two possible modes, mechanical and hermetic protection of such units is also required from almost all types of harmful influences found in nature. This task in the complex is solved by creating a special device, which is described in this paper. The paper provides a functional diagram and a schematic diagram of the most important units of the proposed electrical signal recorder for electrical exploration.
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