SU554518A1 - Device for building seismic sections - Google Patents

Description

pogo drum (photoelectric size 1.5–2.0 m), which limits the speed of seismic section construction at the given resolution of the SPO;

To improve the performance of the proposed device, a reversible counter, a code-analog converter of the error signal, a speed control unit of a digital magnetic tape and a drum angular speed sensor are inputted into it, while the output of the drum angular speed sensor is connected to one of the reversible counter inputs, to the second input of which .connection of the output clock of the clock pulses is connected, the outputs of the reversible counter are connected to the inputs of the converter-analogue of the error signal, the output of which is Through the speed control unit, the digital magnetic tape is connected to the playback unit of the digital magnetic tapes.

The drawing shows the block diagram of the proposed device for the construction of seismic sections.

The device contains a digital magnetic tape playback unit 1, the outputs of which are connected to the inputs of digital information sensors 2, and the outputs of sensors 2 are connected to the input of the seismic channel and information consisting of serially connected code-analogue converter 3 of seismic information, amplifier 4 and modulator 5 types of recording, and the outputs of the seismic information channel are connected to a horizontally deflecting system of a cathode ray tube 6 (CRT) and to its control electrode. In addition, the outputs of sensors 2 are connected to the inputs of a horizontal scanning channel consisting of the connected devices of a clock extraction unit 7, a counter 8 and a horizontal scanning unit 9, and the outputs of a horizontal scanning channel are connected to a horizontal deflection system of a CRT 6. Light box From the screen of the CRT 6, through the lens 10, is projected onto a photo carrier mounted on the drum 11.

The device also contains a unit 12 for horizontal movement of the CRT and the lens. The drum is connected to the rotation mechanism 13 of the drum. The output of the drum speed sensor 14 is connected to one of the inputs of the reBepCHiBHoro counter 15, to the second input of which the output of the clock extraction unit 7 is connected. The outputs of the reversible counter 15 are connected to the inputs of a code-analog converter 16 of the error signal, the output of which is connected through the speed control unit 17 of a digital magnetic tape to a digital playback unit 1 of digital magnetic tapes.

The device works as follows. Pulses read from a digital magnetic tape using sensors 2 and block 1 are fed to the input of a code-analog converter 3, the analog signal from the output of which

through the amplifier 4 is fed to the input of the modulator 5, which produces the signals of the required type for recording by means of deviation, variable density, variable width and their combinations. The respective outputs of the modulator 5 are connected to a horizontal deflection system of a CRT 6 and its control electrode. The signals from the outputs of the sensors 2 are also fed to the input of block 7,

the pulses from the output of which are fed to the input of the counter 8. The outputs of the counter 8 are connected to the inputs of block 9, which after each pulse arriving at the input of counter 8, changes by a certain amount for 5 times the output to the horizontal deflection system of the CRT, resulting in tube moves sequentially from the first route to the following. After successively passing all the tracks, the CRT beam returns to the first track. These types of recordings are exposed by projecting a light spot from the screen of a CRT 6 through a lens 10 onto a photo carrier mounted on a drum 11. After all the recordings have been recorded

From the tracks of one seismogram, the CRT with the lens is moved along the generator of the drum 11 to a new location with the help of block 12. Such movement of the CRT with an object can create a section for a number of seismograms recorded consequently on a digital magnetic tape. Independent rotation of the drum with a constant speed is carried out by mechanism 13. Pulses from the output of sensor 14 are fed to one input of a reg counter 15, to another input of which pulses are received from the output of block 7. Sigpl misalignment of the speed of rotation of the drum 11 and the rate of information flow from the output 7, produced by the reversible counter 15, the analogue code 16 is converted into analog form by the converter and, through block 17, enters the playback unit 1 of digital magnetic tapes. Block 17 outputs to block 1 a control signal of such magnitude as to reduce the magnitude of the error rate between the signals from the outputs of sensor 14 and block 7. Thus, the frequency of the information gain of the playback block is synchronized

Q digital magnetic tapes with a pulse frequency at the output of the drum angular velocity sensor. It is assumed that the frequency of the signals at the output of the sensor 14 increases in proportion to the increase in the rotational speed of Barab5 J1.

A device for building seismic sections containing a playback unit of digital magnetic tapes with digital information sensors, a code-analog converter for seismic information, a recording type amplifier and modulator, a drum with a photo carrier and a rotation mechanism, a cathode ray tube (CRT) with a lens, an extraction unit and a counter clock pulses, a horizontal scanning unit, a horizontal movement unit of a CRT and a lens, while the outputs of the digital information sensors of the digital magnet playback unit through a chain of successively connected seismic information converter code-a converter, amplifier and modulator of the recording type are connected to a control | Impacting electrode and a horizontal deflection system of a CRT, digital information sensor outputs through a serially connected extraction unit and a clock counter are also horizontally connected a deflecting system of a CRT, characterized in that, in order to improve performance, a reversible counter, a code-analogue of the error signal, are introduced into it , the speed control unit of the digital magnetic tape and the drum angular velocity sensor, while the output of the drum angular velocity sensor is connected to one of

the inputs of the reversing counter, to the second input of which the output of the clock extraction unit is connected, the outputs of the reversible counter are connected to the inputs of the code-analogue signal of the error signal, the output of which is connected to the playback unit of digital magnetic mites through the speed control unit of the digital magnetic tape.

11 sources of information taken into account in the examination.

1. "Geophys. Prosp. No. 4, 1968.

2. Avt. swith USSR № 261724, M. CL. G 01V 1/28, 1970 (prototype).