SU1207291A1 - Seismic station - Google Patents

Description

Stimulation refers to the field of geophysical instrumentation, in particular, to instruments for seismic observations and can be used to measure seismic vibrations, as well as vibrations of buildings, engineering structures, etc.

The purpose of the invention is to increase the informativity of the station.

FIG. 1 shows a structural diagram of the station} in FIG. 2 — a functional on the scheme of the first quadrupole {FIG. 3 — a functional diagram from the second to the fifth four-terminal.

The seismic station Sigf1) contains a seismic sensor 1, a parametric converter 2 displacing the pendulum into an electrical signal and a feedback circuit in the form of a first quadrupole 3c connected in series by the transfer function U / and the magnetoelectric transducer 4 converting the feedback voltage into current The moment, To the output of the parametric converter 2 are connected bandpass filters 5, 6, 7 and 8, respectively, which make the working pass bands, broadband velocimetric and three stations ndartnyh kanaloO. Outputs of the first 5, second 6 and third

7-band filters through the second 9, third 10 and fourth 11 h € 1 Triplexes, respectively, are connected to the first, second and third inputs of the recorder 12, and the output of the fourth

The 8-band filter is connected to the fourth input of the recorder 12. The quadrupoles 9, 0 and 11 with the transfer function Wj ensure the formation of channels with characteristics that have constant transmission coefficients in the working frequency band to displace the soil.

Calibrator 3 is connected through a fifth four pole 14 with a transfer function, in a definite way, and changing the pulse shape, connected to the second input of the magnetoelectric converter 4.

First quadrupole 3 Q transfer function

() aiV Mr p; jLL ..

(t, PilKt,)

where K l is the conversion factor at infinitely low frequency;

ijLzj i f are time constants; P is the Laplace operator;

 attenuation coefficients can be implemented in the form of a circuit (Fig. 2) containing three operational amplifiers 15, 16 and 17, ten ten resistors 18-27 and three capacitors 28, 29 and 30. The transfer coefficient at a direct current is set by the values of the resistors 18, 19, 20, and 21. The time constant tj and the attenuation coefficient are determined by the resistance values of the resistors 22, 23, 24, and 25 and the capacitance of the capacitors 28 and 29. The time constants, and ti, are given by the appropriate choice of the resistors 20 and 26 and a capacitor 30. The value of t depends on tJ and the ratio of phenomena resistors 19 and 27,

Four-port networks 9, 10 and 11 with transfer function W, and four

four-terminal 1.4 with full-time

by function

where Kg and K

transform coefficients at infinitely low frequency, fs and T are time, with tj g--

 Zir f c

P is the Laplace operator, | „- the channel's operating frequency may be. Two resistors 32 and 33 and a capacitor 34 are implemented in the form of a circuit (FIG. 3) containing an operational amplifier 3I. The constant current transfer ratio is determined by the ratio of the resistors, and the value of the constant time is determined by the resistance of the resistor 32 and the capacitance of the capacitor 34.

I Seismic Station works as follows: the displacement of the soil affects the sensor. The parametric transducer 2 converts the relative displacement of the tangent and the base of the seismic sensor into an electric signal, which through the four-port 3 enters the magnetoelectric transducer 4, thus closing the negative feedback loop. The quadrupole 3 forms the amplitude-frequency response of the wide-band velocimetric channel and provides for the stabilization of the light source.

the zero position of the output of the converter 2 signal is also fed to the inputs of the polio filters 5, b, 7, and 8, and in the end, the working frequency bands of the corresponding channels. Fourfold Osci 9, 10 and 11 adjust the characteristics of standard seismics. channels, horizontal. portions of the characteristics. in the working frequency band C of the outputs fourfold 2Ci; 2914

luges 9, 10 and II and band-pass filter 8 signals are sent to the recording device 12. When the corresponding command is received, the calibrator 13 generates a calibration pulse, which through a four-pole kick 14 and a magnetoelectric transducer. former 4 acts on the seismic master. The four polar port 14; will generate a calibration pulse, providing it with a passage through the recording device 12 of the worm to all channels.

ten

49toiL /

t / t

i

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VNIIPI; Order 4358. Circulation 416

Branch ShSh Patent, Uzhgorod Project, 4

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Claims (2)

<claim-text> A SEISMIC STATION containing a recorder, the first four, a resector, a magnetoelectric transducer, a seismic sensor, · a parametric displacement transducer, the output of which is through the first quadrupole and the first input of the magnetoelectric transducer connected to the input of the seismic sensor, distinguished by the fact / claim-text> </ li> </ ul> <claim-text> in order to increase the station's informativeness, four bandpass filters were introduced into it, from the second to the fifth quadrupole and calibrator, with the outputs of the first, second and third bandpass filters through. . the second, third and fourth quadruple terminals, respectively, are connected to the first, second and third inputs of the recorder, the output of the parametric converter is connected to the inputs of the first, second, third and fourth band-pass filters, the output of the fourth band-pass filter is connected to the recorder's input, and to the second input The magnetoelectric converter uses a calibrator through the fifth quadrupole, / The first quadrupole is made in accordance with the transfer function, <sub> a </ sub> '_ </ claim-text> <claim-text> the second, third and fourth quadrupoles are made in accordance with the transfer function </ claim-text> <claim-text> where K, and </ claim-text> <claim-text> DC transfer coefficients; </ claim-text> <claim-text> time constants, and d. · * ’</ claim-text> <ul style = "list-style: none;"> <li> <claim-text> - Laplace operator; </ claim-text> </ li> <li> <claim-text> - attenuation coefficients; </ claim-text> </ li> <li> <claim-text> - lower operating frequency of the seismometric channel, </ claim-text> </ li> </ ul> <claim-text> and the fifth quadrupole is made in accordance with the transfer function </ claim-text> <claim-text> - </ claim-text> <claim-text>. 4 ’" ·. · </ Claim-text> <claim-text> where is the time constant; • p is the Laplace operator. </ Claim-text> <claim-text> 1207291 </ claim-text> <claim-text> 1 </ claim-text> <claim-text> 1207291 </ claim-text> 2 The radiation field relates to the field of geophysical equipment, in particular, to instruments for seismic observations and can be used to measure seismic vibrations, as well as vibrations of buildings, engineering structures, etc.