SU1269149A1 - Versions of device for processing seismic vibrations data - Google Patents

Abstract

1. A device for processing seismic data containing two delay elements, the switch whose information inputs are the device inputs, the first output of the switch is connected to the information input of the analog-digital converter, the output group of which is connected to the input group of the recording unit, the second output switch. connected to the subtracting inputs of the first and second time counters, with the first input of the first element I, with the enabling inputs of the analog-digital converter and the register unit and, the third and fourth outputs of the switch are connected respectively to the unit and installation inputs of the first trigger, the output of which is connected to the control input of the switching element, the output of the second time counter, connected to the unit input of the second trigger, the output of which is connected to the second input of the first element I and the first input of the second element And the output of the first element And through the first delay element connected to the shift inputs of the first, second, third and fourth shift registers, the output of the first of which connected to the information input of the second shift register, the output of which is connected to the information inputs of the third and fourth shift registers, the input of the dividing and subtracting unit is connected to the output of the counter, the counting input which is C /) is connected to the output of the switching element connected to the start-up input of the registration unit and to the output of the device, the information output of the dividing unit and (Subtracting is connected to the information inputs of the registration unit and the display unit, the output of the second About the element I is connected to the information input of the first shift register, the second input of the second element I is connected to one of the outputs of the group of outputs of the analog-digital converter, the output of the first time counter is connected to the setting input of the second trigger, which is equipment, it contains the third delay element, the W-NOT element and the first, second and third elements of the EXCLUSIVE, the first inputs of which are connected respectively. With the outputs of the first, second and third shift registers, the second

Description

the inputs are connected to the output of the fourth shift register, the output of the first element EXCLUSIVE OR, and the outputs of the second and third elements EX, SCHEYE OR through the second and third delay elements are connected respectively to the inputs of the element OR NOT, the output of which is connected to the information input of the switching element,

2. A device for processing seismic signals; vibrations, containing two delay elements, a switch whose information inputs are device inputs, the first output of a switch is connected to an information input of an analog-digital converter, a group of outputs of which is connected to a group of inputs of a recording unit, the second output of the switch is connected to the subtraction input of the time counter, with the first input of the element I, with the enabling inputs of the analog-digital converter and the recording unit, the third and fourth outputs of the switch ora connected with. responsibly to the unit and installation inputs of the first trigger, the output of which is connected to the control, its input of the switching element, the output of the Time Counter, is connected to the installation input of the second trigger, whose output is connected to the second input of the I element, the output of which is connected to the first delay element with the inputs of the shift of the first, second ,, third and fourth shift registers, the output of the first of which is connected to

the information input of the second shift register, the output of which is connected to the information inputs of the third and fourth shift registers, the input of the dividing and subtracting unit is connected to the output of the switching element, the outputs of the characteristics of the dividing and subtracting unit mode are connected respectively to the start input of the registration unit and to the device output, information output The dividing and subtracting unit is connected to the information inputs of the registration unit and the indicating unit, characterized in that, in order to reduce the equipment, it contains RATOR, the third element of the delay, the element OR NOT, the first second and third elements EXCLUSIVE IL1-1, the first inputs of which are connected respectively to the outputs of the first, second and third shift registers, the second input is connected to the output of the fourth shift register, the output of the first element of CHCEE OR, and the outputs of the second and third elements are KEYPACK OR, through the second and third delay elements, respectively, are connected to the inputs of the OR element, whose output is connected to the information input of the switching element, the decrypted inputs and are respectively connected to the outputs of the bit time counter, the decoder output is connected to a single input of the second flip-flop, an information input of the first shift register is connected to one of the outputs Group outputs the analog-digital converter.

I

The invention relates to computing.

The purpose of the invention is to reduce equipment.

On Fig.1 presents a block diagram of the device, the first option; in fig. the same, the second option; Fig. 3 is a block diagram of the device operation algorithm in the first embodiment.

The device (Fig. 1) contains a delay element 1 and 2, a switch 3, an analog-to-digital converter (ADC) 4, a recording unit 5, a time counter 6,,. element 7, trigger 8, switch; element 9, trigger 10, delay element 11, shift registers 12-15, division block 16 and 5 subtraction, counter 17, display block 18, oscillation1 excitation unit 19 in the medium, element And 20, time counter 21, EXCLUSIVE OR elements 22-24, element OR NOT 25, input 26, output 27, communications 28-30, delay elements 31 and 32, switch 33, A / D converter 34, registration block 35, counter 36 of time, element 37, trigger 38, com3

mutating element 39, trigger 40, delay element 41, shift registers 42-45, dividing and subtracting unit 46, counter 47, display unit 48, medium-oscillating unit 49, decoder 50, EXCLUSIVE OR elements 51-53, OR-NOT element 54. The input of the first shift register 12 is connected to one of the inputs of the group you, moves ADC 4,

In the flowchart of the proposed device, in the first embodiment (Fig. 3), the following designations are adopted: 55 - setting the initial and final values using a set of time intervals in which measurements are made (setting by switching method at the write inputs of counters 21 and 6, respectively the initial and final values of the measurement time interval in the operation cycle of the switch 3); 56 - installation in block 16 in relative units. The maximum possible seismic record order for a given measurement point; 57 record of the established initial and final values of time intervals in counters 21 and 6, respectively; 58 - data input via switch 3 to the seismic station and their digitization 1ATP; 59 - reducing the contents of the counters 21 and 6 per unit on the clock pulse coming from the switch 3; 60 - check to zero the contents of the counter 21; 61 - installation of the trigger 10 when the contents of the counter 21 are equal to zero; 62 - installation of the trigger 8, if from the switch output comes a sign of the operation of the first channel; 63 — recording information into registers 12-15 and simultaneous shifts of their contents, which are effected by the sync pulse from the output of switch 3; 64 is counting the number of coincidence pulses of counter 17; 65 - check the presence of the sign of the last channel that comes from the switch; 66 check for zero counter contents 6; 67 - reset trigger 8 when there is a sign of the last channel; 68 checking the presence of the first channel feature; 69 - reset trigger 10 when the contents of counter 6 is equal to zero; 70 - calculation by block 16 of the ratio obtained in counter 17 for the total for all seismograms according to the form 691494

assess the degree of ordering of the seismic record to the highest possible degree of order; 71 — verification of compliance of the measured value of the degree of order, which is determined by the change of sign at the output of block 16; 72 start of blocks 5 and 19 from the output of block 16, if the measured value of the steO order of order is less than the installation (determined by the sign of the difference); 73 - block 18 indication of the order of recording; 74 - recording in block 5 of the order of seismic recording.

The algorithm of the device

The first and second options are different

are only in that upon admission

of each sync pulse from the switch in the first device version, the unit is subtracted from the counters 21 and 6, and in the second device version, the unit is subtracted from the counter 36. Therefore, in block 57 it is not necessary to write

25

the initial value in the counter, since it is replaced by the decoder-50, in block 59, the unit is not subtracted from the counter, in block 60, the check is performed not for zero, but for the value of the initial time interval set by the decoder 50.

The device works as follows.

Information at switch 3 output

seismic stations appear in multiplex format, i.e. in the following order: the first word of the first cana. la, the first word of the second channel, ..., the first word of the last channel, the second word of the first channel, the second word of the second channel, ..., the second word of the last channel (t is the recording length (in words) recorded by the seismic station).

The evaluation of the ordering of the seismic record at any point is made using the equivalence function, i.e., if the signs of the reference of the main channel and any comparison with it

the readings of the other channel are the same, the result is equal to one, and with different signs - zero.

When a seismic station is in operation, since the start of registration of the oscillation, the sign of each sample in the form of zero or one comes from switch 3 to ADC 4, from whose output through element 20 it is fed to input S of register 12j having the number of bits by the number of channels. After the first cycle of operation of switch 3, the entire register 12 is full, after the second cycle registers 12 and 13 are filled, and after the third cycle all three registers 14, 13 and 12 are filled, and in register 12 there are signs of (K + 1) -th reference of all channels, in register 13 there are signs of the K-th count of all channels, and in register 14 - signs of the (K-1) -th count of all channels. To assess the order of the seismic record, it is necessary to compare the sign of the K-th count of the first, second, etc. channels with signs (К + 1), К and (К-1) of the second, third, etc. channels. For this purpose, the device provides a register 15, in which the Kth channel count is delayed by one cycle, and elements 22-24 of the truth table for each of which have a fork. Discrepancy pulses from the outputs of elements 22 and 23 through delay elements 1 and 2, and from element 24 is directly fed to the input of element 25, through which impulses 17 are fed to the input of counter. The same operations are performed sequentially for all channels of the seismic recording and for all its samples. In the pulse counter 17, the number of coincidences of the counts of the counts of the main channel and the counts of the counts of the other channels compared with it accumulates. To obtain a quantitative estimate of the degree of order, the division and subtraction block 16 is used, and for its visualization, the indication block 18 is used. The complete ordering of the seismic record is determined by the formula Up lUj / Lllgi where. Up is the numerical value of the top of the full ordering of the seismic record; lUj is the total number of coincidences of the counts of the compared channels; TUsrriKc is the maximum possible total number of coincidences of the counts of the compared channels. The Up value is determined by dividing and subtracting unit 16, at the input of which, at the end of the recording, the code of the Lie number recorded in the pulse counter 17 is received, and the code lUc, which is preset and stored in block 16 of dividing and subtracting. However, when evaluating the quality of a seismic record, the operator is interested in the value not of the absolute degree of order, but of the degree of order of the seismic record with respect to the maximum possible in this region of interest. Therefore, the result of ZUg / -UsMai c is subtracted in block 16 of dividing and subtracting from the previously entered setpoint (in relative; | solid units as a fraction). After each registration cycle, the division and subtraction block 16 impresses the impulse arriving at the registration block 5, block 19 if the measured value of the degree of order of recording is less than the input setpoint. The order value is displayed on the display unit 18. The process of calculating the quantification of the seismic recording ordering is repeated until the calculated value reaches the value of the entered setpoint, which is determined by the difference in division and subtraction unit 16 i. The ordering degree value is recorded in the recording unit 5. The time counters 21 and 6 are used if it is necessary to measure the degree of ordering of the seismic recording in a certain time window determined by the difference between the initial and final time window values that are dialed in the counters 21 and 6, respectively. The window duration is fixed in trigger 10, one of the inputs of which receives a pulse from the counter 21. When the initial time window value is reached in it, and the other input of the trigger 10 receives a pulse from counter 6 when the final time window value is reached.

In order to stop measurements during the transition from the last channel of the gather to the first channel in order not to distort the quantitative estimate, trigger 8, which blocks the switching element of the transition time, is used. The inputs of the trigger 8 are connected to the circuits forming the gate pulses of the last and first channels of the switch 3.

In the second embodiment, the operation of the device differs from that described in that the information from the output of the A / D converter 34 is supplied

directly to the input of the sequential write 42 and controls the recording of only the clock signal coming to the clock inputs of the registers 12-15. In addition, when each clock pulse arrives from the switch in the first device version, the unit is subtracted only from the counter 36, since the counter in the second version is replaced by the decoder. The setting of the initial moment of registration in this case is carried out not by switching at the inputs of the parallel counting of the counter as in the first variant, but by switching the outputs of the decoder 50.

Claims (2)

1. A device for processing seismic data, containing two delay elements, a switch, the information inputs of which are inputs of the device, the first output of the switch is connected to the information input of an analog-to-digital converter, the group of outputs of which is connected to the group of inputs of the registration unit, the second output of the switch is connected with the inputs of the subtraction of the first and second time counters, with the first input of the first AND element, with the enabling inputs of the analog-to-digital converter and the recording unit, t the first and fourth outputs of the switch are connected respectively to the unit and installation inputs of the first trigger, the output of which is connected to the control input of the switching element, the output of the second time counter is connected to the single input of the second trigger, the output of which is connected to the second input of the first element And and the first input of the second element And, the output of the first element And through the first delay element is connected to the shift inputs of the first, second, third and fourth shift registers, the output of the first of which is connected to the formation input of the second shift register, the output of which is connected to the information inputs of the third and fourth shift registers, the input of the division and subtraction unit is connected to the output of the counter, the counting input of which is connected to the output of the switching element, the output of the end sign of the division and subtraction unit is connected to the input start the registration unit and to the output of the device, the information output of the division unit and (Subtraction is connected to the information inputs of the registration unit and the display unit, the output of the second element And is connected to information input of the first shift register, the second input of the second element AND is connected to one of the outputs of the analog-to-digital converter output group, the output of the first time counter is connected to the installation input of the second trigger, characterized in that, in order to reduce equipment, it contains a third delay element, the OR-HE element and the first, second and third elements are EXCLUDED OR, the first inputs of which are connected respectively to the outputs of the first, second and third shift registers, the second $ H693r ^{, r} ns 1269 inputs are connected to the output of the fourth shift register, the output of the first EXCLUSIVE OR element and the outputs of the second and third EXCLUSIVE OR elements are connected through the second and third delay elements to the inputs of the OR-NOT element, the output of which is connected to the information input of the switching element. 2. A device for processing data .-; seismic vibrations, containing two delay elements, a switch. 7 switch, the information inputs of which are inputs of the device, the first output of the switch is connected to the information input of an analog-to-digital converter, the group of outputs of which is connected to group of inputs of the registration unit, the second output of the switch is connected to the input of the subtraction of the time counter, with the first input of the And element, with the enabling inputs of the analog-to-digital converter and the registration unit, the third and fourth outputs to Mutators are connected respectively to the unit and installation inputs of the first trigger, the output of which is connected to the control, by the input of the switching element, the output of the time counter is connected to the installation input of the second trigger, the output of which is connected to the second input of the element And, the output of which through the first delay element is connected to the shift inputs of the first, second, third and fourth shift registers, the output of the first of which is connected to the information input of the second shift register, the output of which is connected to the information the input inputs of the third and fourth shift registers, the input of the division and subtraction unit is connected to the output of the switching element, the outputs of the signs of the mode of the division and subtraction are connected respectively to the start input of the registration unit and to the output of the device, the information output of the division and subtraction unit is connected to the information inputs of the registration unit and an indication unit, characterized in that, in order to reduce the equipment, it comprises a decoder, a third delay element, an YLI-NOT element, the first, second and third elements EXCLUDING ITS OR, the first inputs of which are connected respectively to the outputs of the first, second and third shift registers, the second inputs are connected to the output of the fourth shift register, the output of the first element is EXCLUSIVE OR, and the outputs of the second and third elements are EXCLUSIVE OR, through the second and third delay elements, respectively, are connected to the inputs element OR NOT, the output of which is connected to the information input of the switching element, the inputs of the decoder are connected respectively to the outputs of the bits of the time counter, the output of the decoder is connected n with a single input of the second flip-flop, an information input of the first shift register is connected to one of the analog-to-digital converter outputs the group of outputs.