SU346694A1 - DEVICE FOR REGISTRATION OF SEISMIC INFORMATION IN DIGITAL FORM - Google Patents

Description

The invention is intended for use in seismic exploration.

A device for recording seismic information in digital form is known, in which recording onto a magnetic tape is carried out by one magnetic head on a single track of the carrier by a successive code in a multiplexed form.

The known device has a number of disadvantages. Due to the fact that zayis to a magnetic tape is produced in multiplex form, it is difficult to enter the recorded information into electronic computers, especially into machines that have less RAM memory than is required to enter a complete seismogram (recording all recorded channels) without interrupting input.

In addition, the known device has several reproducing analog channels (according to the number of recording channels), each of which includes frequency filters and an automatic gain control. The end point of the reproducing w, its part of the device is a multi-channel loop oscilloscope.

A code converter and an intermediate Iam tee unit are introduced into the proposed device. The code converter has one input connected to the analog-code converter output, and several outputs of demultiplexed signals in serial code by the number of seismic channels, which in the registration mode are connected via a switch each with their own intermediate memory section. In the mode of transferring signals from the intermediate memory to one track of the magnetic tape and to the carrier of the visible image, the interim memory sections, each corresponding to their seismic recording path, are connected to the magnetic head of the digital recorder and to the input of the single-channel reproduction path through the same switch that There is a serial switching of these departments.

This allows you to enter recorded information into electronic computing machines track by track, rather than all

seismogram tracks, as in the above device; Visualize the recorded track information by track using only one analog reproducing box with frequency filters and an automatic gain control. The end unit of the reproducing part of the device may be a single writing element, for example, a non-writer. Pastels show the block diagram of the predlo The device consists of analog input amplifiers /, multinlexer 2, converter 5 analog-code, converter 4 codes having one input connected to converter 5, and several outputs (according to the number of recording channels) connected through switch 5 each with its own intermediate memory department.

As an intermediate memory 6 with sections according to the number of channels, for example, a magnetic drum with recording magnetic heads according to the number of channels can be used. In this case, each magnetic head and the corresponding track form its own section of intermediate memory for recording in the sequential code of one seismic trace.

Intermediate memory sections 6 are connected via switch 5 to both a single-channel magnetic recorder 7 and a code-analog converter 8, to an analog reproducing path 9 terminating in a squeaking element (for example, a handwriter) 10.

The proposed device works as follows.

In the recording mode, seismic signals fed to analog input amplifiers 1 are amplified by them and fed to multiplexer 2. From the output of multiplexer 2, multiplexed analog signals are sent to converter 3, where they are converted into a parallel digital code. From the output of the transducer 3 multiplexed seismic signals in the form of a parallel digital code is fed to the input of the transducer 4.

Transducer 4 converts a parallel digital code into a serial one and distributes seismic signals as a serial digital code through its outputs so that each output receives signals related to one recording channel. The signals from each output of the converter 4 go through the switch 5 to their own intermediate memory section 6 and are stored there.

In the dubbing and monitoring mode, the signals read sequentially track by trace from the divisions of intermediate magnetic memory 6 are transmitted through switch 5 to magnetic recorder 7 and recorded there by one magnetic head on one track of the carrier track by trace. At the same time, the same signals arrive at the converter 8, where they are converted into analog forms). From the converter 8, signals in analog form are fed to the analog reproduction path.

Where is the frequency filtering of the signal and automatic adjustment of its level. Next, the signal enters the squeaking element 10, which reproduces the record in visible form, sequentially, the track behind the track.

Subject invention

A device for recording seismic information in digital form, containing

amplifiers for the number of channels, multiplexer, analog-code converter, single-channel digital recorder and single-channel reproduction path, characterized in that, in order to simplify the input of the registered

seismic information into electronic computing platforms and visualization of the recorded data using a single-channel reproducing device by means of a sequential-traverse representation

multichannel seismic data in a serial digital code on a single track of a magnetic tape; a code converter and an intermediate memory block are inserted in it, while the code converter has

one input connected to the analog-code converter output, and several outputs of demultiplexed signals in a serial code by the number of seismic channels that are connected through a switch each to their own intermediate memory section, and in the way of rewriting signals from the intermediate memory on one tape track and a visible image carrier

the intermediate memory sections corresponding to each of their seismic recording paths are connected to the magnetic head of the digital recorder and to the input of the single-channel reproduction path through the same switch,

which performs the serial switching of these departments.