SU600495A1 - Device for automatic determining of seismic wave propagation velocity - Google Patents

Description

The device contains nt sensor 1, spectrum analyzer 2, extreme controller 3, and the electrical code rate block 4. When playing back seismic. Informa- tion and the signal read by sensor 1 is iodine in a1 spectrum analyzer 2. After that, the spectrum analyzer 2 examines the sigal and determines the position of the maximum spectral density. Extreme-scale controller 3 monitors the shift of the maximum spectral density, and electrical unit 4 issues a code for speed values in accordance with the spectral density of the signal from the sensor to the detector (shown in the drawing). The seismic detectors 1 convert the detected seismic waves into electric sigals, which are amplified by the input amplifiers and arrive at the switch of channels 6 for a temporary seal and then to the analogue converter - code 7 (Fig. 2). From the output of the analog-code converter / signals of seismic information samples are received through the control unit 8 pa input of the digital information selection unit 9 and recording into the magnetic recorder 10. In the digital information selection unit 9 out of all the sampling signals (in the case of a large number of recording channels) Only those that correspond to a given sequence of channels are fed to the distributor of channels 11, and then to the narrow-profile digital filter 12 of the proposed device. Digital filters tuned to a discrete frequency are completely analytically described by their transfer functions. For some constant location of the poles and zeros in the Z plane, the generation of the quaitoning period and the average frequency of the filter is the state of i.e. (where, co is the frequency of the digital filter; f is the quantization period; / is a constant. The analyzer detector used in the proposed device uses a variation in the frequency quantized for the bandwidth fi; 1 1tr, which is deployed on the frequency spectrum of the frequency spectrum of the digital filter. s, received from the generator of synchronizing pulses 13. In turn, often the pulses from the geerator 13 are controlled by the signal. The output of the digital filter 12 is a set of binary signals in the binary code representing the amplitude of the seismic wave in a narrow band This filter is fed to a code converter, analogue 14, to form an analog filter representing the output of the field filter. The code-analog converter 14 contains a forward register executed on integral triggers, key circuits by the number of bits, and a passive voltage adder (summation line). The code and the inputs and inputs of the receiver registers, is stored in the register and the positive edge of the number marker. The receive register is reset in the immobilization preparation. In this case, the output of the transducer is obtained by a stepwise approximation of the analog signal at the time of the working zone, "i) or - between the zones. The check code in the register serves to control the keys, the commuting positive and negative voltage of the summation line. Each value of the input signal is in digital form defined by a specific iiainput at the output of the converter. The output signal of the code-analog converter 14 is applied to the circuit. Formation of rectangular impulses 1b. Typically, cxe.viOH, using my model as a circuit for rectangular imulse, there can be a usual detector circuit, in which, as a rule, HUMOT polirovodnkovy code in the area in which the current passing through the diode, is proportional to the square of the voltage on the terminals of the diode and because of this, the circuit is an electric one, which, however, is current, it represents the square of the input voltage. From the output of the circuit, the first coalition of io eiigal is fed to the input of the analogue filament circuit 16. Erection into the second wall and one integration can be performed using digital circuits. The methods of construction of such cxe.vi are well known. It is only OT.vieTHTb that the nitegrirovain time changes back to the average of the digital filter 12. The signal obtained, representing the spectral density of the input signal b (s) at the average frequency of the filter, is transmitted successively through the analog-to-code converter 17, the reverse binary scheme of the filter .ch counter ib in the reversible binary counter 19, wavelength on the nyteral triggers, in the form of a n-number code, and iorioioryalgoy nz.mepena ao extremum. 6 (03). An analogue converter - the code G / consists of a comparator, decoding liieiki, a voltage stabilizer, a logic log and a register (not shown in Sri. 2). The logic 2U scheme actually zzormiruet of the sonic regulator 1, its effect in dependencies 01 of the previous influence, the memorized device 21, the sign of the filter reaction, which is determined by the reversible binary counter sign 22 19. The output device 23 generates information about the change of the binary counter 19. regulating effect on the stitch that controls the operation of the generator 13. When the regulating action is 11, the average frequency of the digital filter 12 is measured. The output of the generator 13 is knocked down in block 4, where Sco decomposition on axis with graduiruets in values of speed and moreover, ua digital counter circuit 24, which may as well life, use a chain of trigger: first circuits 11r; - and asi; null and recalculate input IM pulses. From the output of the circuit of the digital counter 24, the copova 2o generator circuit input is interrupted. When the digital counting circuit: ka 24 collects a predetermined impulse of impulses, it seems to impale a predetermined number of the output of the 13 grammers (therefore, associated with the same predetermined number of querfits of the digital filter 12), the reset geyrator 25 will produce the output with ;: hyal (NMR of preparation) to return to the original G position of the digital filter 12, and the transducer code is analog 14, the circuit formed by the nt of the motor pulses 15 and the analog HHTerpi.pyioHiyio circuit 16.

The device also includes an electrically-supported stand and a vizulg-i-n isa indicator on a television set with a remote control, where the speed code block n log1 is located: a cic system ensuring the operation of the node assemblies. All electronic - sk. We blocks are made up of printed circuit boards with a wide range of stitches. The boards are unfolded in a cassette that is attached to the front of the unit. I reach to the checkpoints on the front of the CTC through the door on the front cannel of the block. The control panels are located on this folder.

According to the results of the analysis, the recording device can fix:: .. both phase and ground speed of the diluted seismic oscillations

The seismic velocity function is recorded in graphical and H11 versions. These functions can also be observed on the terminal ICT / PCE device in many different subdivisions of the “space-time - speed n” relationship to transform them in order to accumulate, translate depth, migrate, determine different characteristics. underground seams.

F o r l; u l a n z o b r with t n n

Device for the rapid distribution of seismic data, which consists of seismic data: oi i and a spectrum analyzer, about which. what, with the best: and the accuracy of the speed range, into it

A block of an ex 1K regulator is installed; a speed code block is installed, which is connected to an electrical one.

6, iOKOM ko.ta fast D1 through the unit ekstmallioro rsg;

1 icToniiiiKH and fortifications, ex: ;; see for examination

1..BTopcKoe property.Ktslstvo USSR L 130123, cl. G 1/00, 1960.

2. Author's testimony of the USSR Lo 39277G. cl. G 01V 1/28, 1971.