SU1130812A1 - Seismic wave source control device - Google Patents

Abstract

A CONTROL DEVICE FOR THE SOURCE OF SEISMIC WAVES, containing a series-connected source of command pulses, a first electronic key, a constant frequency generator, and a counter connected to the first input of the first comparison circuit, sequentially connected an additional organ, a seismic wave momentary generator unit, a second electronic key , the output of which is connected to the second input of the first electronic key, the unit for setting a given number connected to the second input of the first comparison circuit, the output to The operator is connected to the second input of the counter, the second input of the second electronic key and the counting input of the reversible counter, characterized in that, in order to expand its functionality by providing control of various types of seismic wave sources, a number selection unit, frequency divider, second the comparison circuit, the switch, the third and fourth electronic keys, the counting input of the frequency divider is connected to the output of the constant frequency generator, the first output is not the first input the fourth key, the second with the first input of the third key, the second input of which and the second input of the fourth key are connected to the output of the first comparison circuit, the output of the third key is connected to the executive body, the output of the fourth key is connected to the g input of the number selection box, control (L The reversible counter input is connected to the second output of the set number unit, the setup input of which is connected to the first code output of the switch, and the output to the control input of the frequency divider, the second code output of the switch connected to the input of the second comparison circuit, to the second input of which, and on the input of the installation unit of the specified number 00, the code of the number selection unit is connected, the output of the second comparison circuit is connected to to the third input of the second electronic switch, the third output of the switch is connected to the second control input, third and fourth electronic keys.

Description

The invention relates to a seismic vision technology, namely, a control system for pulsed, pulse-type and vibratory sources of seismic waves. A software device for controlling a source of seismic waves is known, which contains a clock pulse generator, a main and auxiliary frequency converter, a reversible counter, the code output of which is bitwise connected to the control inputs of the specified main frequency converter, a frequency subtraction circuit, a switch, a frequency comparison circuit, three register, one of the code outputs of the switch is bitwise connected to the installation inputs of the reversible counter, and the other to one of the two inputs of the circuit However, the device does not allow to receive command signals that vary programmatically according to a given law other than linear, and also does not allow to synchronize several N-banding methods during snapshot accumulation. The closest in technical essence to the present invention is a device for controlling a source of seismic waves, comprising a serially connected source of command pulses, a first electronic key, a constant frequency generator and a counter connected to the first input of the first comparison circuit, sequentially connected actuator, unit marks of the moment of formation of a seismic wave, the second electronic key, the output of which is connected to the second input of the first electronic key, the unit for setting a given number, connected to the second input of the first comparison circuit, the output of which is connected to the second input of the counter, the second input of the second electronic key and the counting input of the reversible counter C2J. A disadvantage of the known device is its limited use in seismic methods associated with high frequencies of the control signal, and a large number of effects reaching several thousand hours, which are, for example, a vibration-pulse seismic method for which the conditions fj fy are satisfied those. the pulse frequency is comparable with the prevailing pulse frequency, or the vibroseis method. This disadvantage is due to the need to transmit the reference signal over the air, which leads to low reproduction accuracy of the reference signal, as well as the need for device complexity associated with an increase in the number of information stored in the unit to set a specified number of information by several tenths. The purpose of the invention is the expansion of operational capabilities by providing the ability to control various types of seismic source sources. The goal is achieved by the fact that the seismic wave source control device | containing a series-connected source. command pulses, the first electronic key, a constant frequency generator and a counter connected to the first input of the first comparison circuit, an actuator connected in series, a seismic wave moment marking unit, a second electronic key whose output is connected to the second input of the first electronic block. setting a given number, connected to the second input of the first comparison circuit, the output of which is connected to the second input of the counter, the second input of the second electronic key and the counting input of the reverse counter, entered into it a number selection unit, frequency divider, second comparison circuit, switch, third and the fourth electronic keys, the counting input of the frequency divider is connected to the output of a constant frequency generator, the first output is connected to the fourth key input, the second to the first input of the third key, the second input of which oh fourth key input connected to the output of the first comparison circuit, the third switch output is connected to the actuating body, the fourth key output soediien to the input selection unit number control input revsrsvvnogo counter is connected to the second output block of the predetermined number, adjusting input of which is connected

with the first code output of the switch, and the output with the control input of the frequency divider, the second codec output of the switch is connected to the input of the second comparison circuit, to the second input of which the output of the number selection block is connected to the input of the set number installation unit, the output of the second comparison circuit is connected to the third input of the second electronic key, the third output of the switch is connected to the control inputs of the second, third and fourth electronic keys. The drawing shows a block diagram of the proposed device.

 The seismic wave source control device contains a source of command pulses 1 connected in series with a first electronic key 2, a constant frequency generator 3, and a counter 4 whose output is connected to the first input of the first comparison circuit 5, the set point setting unit 6, the number sequential unit 7 connected to the Executive body 8, the block -9 R. mark seismic waves, the second electronic key 10, the output of which is connected to the second input of the first electronic key 2, the first output of block 6 is set A given number is connected to the second input of the first 5 comparison circuit, the output of which is connected to the counting input of the reversing counter I and the second input of the counter 4 and the second electronic key JQ, the third 2 and fourth 13 electronic switches, the frequency divider 14, the switch 15 modes, the second circuit 16 comparisons, the counter input of the frequency divider 14 is connected to the output of the generator 3 of a constant frequency, the first output to the first input of the fourth electronic key 13, the second to the first input of the third electronically controlled key 12f to the second inputs of the third 12 and h the third 13 electronic key is connected to the output of the first comparison circuit 5, the output of the third 12 electronic key is connected to the actuator 8, the output of the fourth 13 electronic key is connected to the input of the number selection block 7, the control input of the reversible counter 1I is connected to the second output of the installation 6. given number, the setup input of which is connected to the first code output of the switch 1 5, and the output -

The control input 9m of the frequency divider 14, the second code output of the switch 15 is connected to the input of the second comparison circuit 16, to the second input of which, as well as to the input of the installation unit 6 of a given number, the output of the number selection block 7 is connected, the output of the second comparison circuit 16 is connected to the third input of the second The electronic key 10, the third output of the switch 15 connect with the control inputs of the second 10, third 12 and fourth 13 electronic keys.

As the first electronic key 2, for example, the R-S trigger can be used. The first input S is connected to the source output. I command pulses, the second input R to the output of the second electronic key 10.

Consider the operation of the device on the example of the implementation of the method of directional explosion.

In the initial state, no signals are received from the source 1 of the command pulses, the first electronic key 2 prohibits the feed and my constant frequency from generator 3 to the counter of 4 pulses. Counter 4 is in the zero state. The number selection unit 7 connects to the inputs of the first comparison circuit 5 a code corresponding to the first delay value}. The unit for setting a given number is an encoder, and the unit for selecting a number is a counter. The switch 15 by the third output allows the passage of the V. signal from the output of the first comparison circuit 5, to the executive body 8, the first electronic key 2 and the number selection block .7, respectively (the control signal goes to the second 10 , third 12 and fourth 13 keys.

A command impulse from source I transfers trigger 2 into a single state and constant frequency pulses from generator 3 are fed to the input of counter 4. When the number in / counter 4, equal to the number supplied, is reached. To the inputs, of the first circuit: 5 compare with the unit 1 of 6 installation of a given number, first scheme. 5 comparison generates a K-pulse, which sets the counter 4 to the zero state, closes the raw 2i electronic key, preventing the supply of pulses to the input of the counter 4, and the number-selector unit 7 switches to the second state, at the same time the same pulse is applied at the entrance of the executive body 8. At the entrance of the first. of the comparison circuit 5, the number selection block 7 connects a code equal in value to the delay of the second pulse. Consequently, when the second command pulse arrives from the seismic station 1, the pulse will be delayed by a time equal to the number code corresponding to the second value of the function multiplied by the duration of one clock cycle of the constant frequency generator 3. Thus, each followed by a coma pulse realizes the prescribed law of action of the seismic source. After a certain number of impacts, the cycle may repeat. The seismic wave source control device also allows the grouping method to operate at a synchronous accumulation. In the initial state, there are no signals from the source I of command pulses (from the seismic station), the first electronic switch 2 (the trigger prevents the pulses of a constant frequency from the generator 3 to the counter 4. Counter 4 is in the zero-state. The second electronic switch 10 the third output of the switch 15 is set to a state in which the output of the seismic wave moment generation unit 9 is connected to the second input of the first key 2 and the third and fourth keys connect the output of the first comparison circuit 5, respectively. An additional unit 8 and a number selection block 7. On the input of the first comparison circuit 5 from block 6 at the installation of a given number, a code corresponding to the initial state of the number selection block 7 is supplied, the value of which is greater than the constant response of the seismic waves source 1. from the source 1, the first electronic key 2 is disconnected, and the pulses of a constant frequency from the generator 3 are fed to the input of the counter 4. When the number in the counter 4 reaches the number supplied to the inputs of the first circuit 5 of the comparison of codes from the unit 6 On the number, the first comparison circuit 5 generates a pulse, which zeroes the counter 4 and goes to the executive body. After the actuator 8 has triggered, the seismic wave moment generation unit 9 generates a pulse that, through the second electronic key 10, closes the first electronic key 2, disabling the supply pulses from generator 3 to counter 4. In counter 4, there remains a number equal to the constant response of the seismic wave source. When the second command pulse is applied, counter 4 will start counting not from zero, but from the number written in it to the value of the code, the values of which are constant at. The next command signal and the constant triggering of the seismic source. When operating in vibroimpulse mode, the G5 switch controls the third output with keys 10-13 so that the output of the second comparison circuit 16 is connected to the second input of the first switch 2, the second frequency divider 14 to the input of the actuator 8, and - the first output of the frequency divider 14, which implies constant time intervals determined by the frequency of the generator 3 and the size of the counter included with the integral part of. divider 14 frequency. The first code output of the switch 15 connects to the installation inputs of the reversible counter 1I cd of the initial frequency, which must be fed to the actuator 8 from the second output of the frequency divider 14. The second code output. Switch to switch 5, sets the code of the time interval to one of the inputs of the second comparison circuit 16. A command impulse from source 1 through key 2 starts generator 3. Pulses from generator 3 enter counter 4 and frequency divider 14. At the first output of the splitter 14 frequency, the pulses appear corresponding. certain time intervals,. which, using the number selection unit 7, connect to the first comparison circuit 5, the codes stored in the installation unit 6 of the predetermined number. If these codes are constant and equal to zero, then the input of the reversible counter is 11 pulses c; the output of the first circuit 5 of the comparison is not received and from the second output of the frequency divider 14 to the executive authority 8 is supplied a constant frequency, set

Claims (1)

SEISMIC WAVE SOURCE CONTROL DEVICE, containing a serially connected command pulse source, a first electronic key, a constant frequency generator and a counter connected to the first input of the first comparison circuit, an additional organ connected in series, a seismic wave marking unit, and a second electronic key whose output is connected to the second input of the first electronic key, a unit for setting a given number, connected to the second input of the first comparison circuit, the output of which is It is connected to the second input of the counter, the second input of the second electronic key and the counting input of the reversible counter, characterized in that, in order to expand its functionality by providing the ability to control various types of seismic wave sources, a number selection block, a frequency divider, and a second comparison circuit, switch, third and fourth electronic keys, and the counting input of the frequency divider is connected to the output of the constant frequency generator, the first output is the first input of the fourth key , the second - with the first input of the third key, to the second input of which and to the second input of the fourth key the output of the first comparison circuit is connected, the output of the third key is connected to the executive body, the output of the fourth key is connected to the input of the number selection unit, the control input of the reverse counter is connected to the second the output of the unit for setting a given number, the installation input of which is connected to the first code output of the switch, and the output is to the control input of the frequency divider, the second code output of the switch is connected to the input of the second comparison circuits, to the second input of which and to the input of the set number setting block the output of the number selection block is connected, the output of the second comparison circuit is connected to the third input of the second electronic key, the third output of the switch is connected to the control inputs of the second, third and fourth electronic keys.