Device designed to monitor local irregularities and geodynamic zones of geological section top part (gst)
FIELD: instrument making.
SUBSTANCE: invention relates geophysics, particularly, to electromagnetic LF devices intended for analysing GST. Proposed device comprises two antennas arranged orthogonally and connected to receiver, one of them being installed vertically. Proposed device comprises additionally data processing device and third antenna arranged orthogonally to aforesaid two antennas and connected to aforesaid receiver. The later incorporates transmitter with its output connected to the data processing device input. Transmitter allows transmitting signals comprising data on mutually-orthogonal components Hx, Hy, Hz of natural pulsed electromagnetic Earth field to data processing device the later allows computation of Wzx (x, y)=Hz/Hx and Wzy (x, y)=Hz/Hy, determination of relationship Wzx=F(Δf) and Wzy=F(Δf), where "ДГ" is the range of received frequencies of mutually-orthogonal components Hx, Hy, Hz, from f0 to f and integration of aforesaid relationships Wzx and Wzy.
EFFECT: expanded performances, higher accuracy.
9 cl, 5 dwg
The invention relates to Geophysics, in particular to low-frequency electromagnetic devices for exploring the upper part of geological section high frequency resolution, control and prediction of stress-strain state (SSS) of the rock mass. It can be used to identify and contouring profile when shooting local geoelectric inhomogeneities (watered mould, karst cavities, landslide zones, mine part-time work, increased fracturing, intervals, loose rocks etc). This invention specifically can be used for network monitoring for operational monitoring of the VAT in the areas of gas transmission systems in areas of activation dangerous man-made geological processes. The results of such monitoring are of practical use when an objective assessment and prediction of risk, ensuring safety of operation is responsible of the gas of interest and timely adoption of managerial decisions.
A device for detection of local inhomogeneities and geodynamic zones of the upper part of geological section high frequency resolution, included in the device to search for and define the boundaries of tectonic disturbances in the development of coal deposits, containing the receiving antenna, connected with the sighting tube of the receiver, installed on the tripod, and the tripod is equipped with tokoprovodyaschaya rod, which is attached to the tripod with the possibility of rotation in its upper part, the receiving antenna is fixed in the lower part tokoprovodyaschaya rod through a universal joint, forming a swivel freely suspended pendulum (USSR Author's certificate No. 1721242, E21C 41/18, publ. 23.03.1992).
The device also includes a transmitting antenna mounted on a second tripod, and the transmission and reception antenna made framework. This device uses active radio wave method of research in which to search for tectonic and other geological discontinuities using an electromagnetic wave.
A limitation of this device is a great complexity of its use, especially when large areas of the surface being examined, and that the device is difficult to use when monitoring for operational monitoring of the VAT in the areas of gas transmission systems in areas of activation dangerous man-made geological processes.
The closest is a device for the detection of local inhomogeneities and geodynamic zones of the upper part of geological section high frequency resolution, containing two antennas located mutually orthogonal, one of which is oriented vertically, and poseiden is installed to the receiving device (RF Patent for the invention №2328021, G01V 3/12, publ. 10.02.2008).
This device is also included with the device for geophysical surveys of the radio wave method. The antenna is made of the framework. Vertically oriented antenna of this device performs the function of antenna spatial orientation (APO) and is not used directly in the conduct of geophysical research.
The application of this device is time-consuming, due to the use of the framework of antennas it has a large size, the device has low accuracy and validity of the results because the measurements are not synchronous, and for a long time one antenna of the receiving device oriented horizontally, and devices for field studies must be migrated to different parts of the analyzed high frequency resolution.
Solved by the invention to improve technical and operational capabilities.
The technical result, which can be obtained by carrying out the invention, the enhancement of the accuracy, reliability, and usefulness, functionality enhancements by identifying in real-time local inhomogeneities and geodynamic zones in the field of high frequency resolution and estimation of their energy.
To solve the problem with the achievement of the technical result in the known device for about what Eugenia local inhomogeneities and geodynamic zones of the upper part of geological section high frequency resolution, contains two antennas, located mutually orthogonal, one of which is oriented vertically and connected to the receiving device according to the invention is introduced to the processing device and the third antenna connected to the receiving device and located orthogonal to the above-mentioned two antennas, and the receiving device is equipped with a transmitter, the output of which is connected to the input of the processing device and configured to transmit signals with data about mutually orthogonal components Hx, Hy, Hz flux density natural pulsed electromagnetic field of the Earth (EIANZ) to the processing device and the processing device is configured to calculate two main complex amplitude mV frequency parameters - tippers Wzx(x, y)=Hz/Hx and wzy data member(x, y)=Hz/Hy, whether Wzx=F(Δf) and wzy data member=F(Δf), where Δf is the range of acceptable frequencies are mutually orthogonal components Hx, Hy, Hz, f0to f and with the possibility of integrating dependency Wzx and wzy data member to get them square
Possible additional embodiments of the device in which it is advisable to
- introduced universal joint, rod, means for rotating the rod, the first, second and third antenna by means of a vertical antenna is connected to the cardan joint, which through rod connected to the means of its rotation;
- was introduced traverse the pipe that is installed on the tool rotation rod, and traverse the pipe is made removable;
- introduced the means for guiding the vertical antenna vertically, which is made in the form of a circular level, suspended on the longitudinal axis of the vertical antenna.
- was introduced sheath made radiotransparent and sealed in the form of a sphere, and the first, second and third antennas are located in the shell;
the first, second and third antennas were made of ferrite cores placed on them by the coils.
Additionally it is advisable to
- each of the antennas was performed at least three ferrite cores placed on each of the coils;
- was introduced electrostatic screen, which surrounds the coils;
in electrostatic screen was performed, at least one cross the gap.
These advantages, and features of the invention are explained the best option its performance with reference to the accompanying drawings.
Figure 1 depicts schematically the proposed device;
figure 2 same as figure 1, functional diagram, one of the possible variants;
figure 3 schematically receiver-transmitter, i.e. the part of the device, before aznacennia to measure the mutually orthogonal components Hx, Hy, Hz flux density EINS;
4 is a diagram of the locations of transmitter-receiver pairs and the reference station for the pipeline;
figure 5 is the same as figure 1, for the studied surfaces.
Device for the detection of local inhomogeneities and geodynamic zones of the upper part of geological section high frequency resolution (figure 1) contains two antennas 1 and 2, located mutually orthogonal. One of the antennas, for example 1, is oriented vertically. Antennas 1 and 2 is connected to the receiving device 3.
Entered the processing device 4 and the third antenna 5 connected to the receiving device 3 and located orthogonal to the above-mentioned two antennas 1 and 2. The receiving device 3 is equipped with a transmitter 6, the output of which is connected to the input of the processing device 4 and is arranged to transmit signals with data about mutually orthogonal components Hx, Hy, Hz flux density EINS on the processing device 4.
The transmitter 6 may be performed in various ways and is associated with the processing device 4, for example, satellite communication, radio communication, satellite communication, etc. figure 2 shows one possible functional circuits enable communication with the processing device 4. Although there are many well-known schemes for the transmission of information via different communication channels, differing from each other as shemotehnicheski and solutions and ways of conveying information.
The device 4 treatments (1, 2) is configured to calculate two main complex amplitude mV frequency parameters - tippers Wzx(x, y)=Hz/Hx and wzy data member(x, y)=Hz/Hy, whether Wzx=F(Δf) and wzy data member=F(Δf), where Δf is the range of acceptable frequencies are mutually orthogonal components Hx, Hy, Hz, f0to f and with the possibility of integrating dependency Wzx and wzy data member to get them square
The above calculation device 4 carries out with the help of appropriate software.
In the claimed device (3) can be introduced universal joint 7, 8 bar (non-conducting), the tool 9, the rotation of the rod 8 (for example, the thrust bearing). First, second and third antennas 1, 2 and 5 respectively through the vertical antenna 1 is connected to a cardan hinge 7, through which the rod 8 is connected to the means 9 of its rotation. The tool 9 is a bearing unit.
Also, a traverse tube 10 mounted on the vehicle 9, the rotation of the rod 8, and traverse the pipe 10 is made removable.
In addition, it is expedient to introduce the tool 11 to the vertical orientation of the antenna 1 in the vertical direction. The tool 11 may be made in the form of a circular level is, hanging on the longitudinal axis of the vertical antenna 1.
It is advisable to enter in the device shell 12 made of the radio waves and sealed in the form of a sphere, while the antenna node, the first, second and third antennas 1, 2, 5 are located inside the shell 12.
First, second and third antennas 1, 2, 5 should consist of ferrite rods 13 placed on them by the coils 14.
Each of the antennas 1, 2, 5 performed at least three ferrite cores placed on each of the reels 14 (Fig 3).
In addition, it is expedient to introduce into the device electrostatic screen 15, which surrounds the coils 14.
In an electrostatic screen 15 may be made of at least one transverse gap 16.
Figure 3 also shows the dielectric holder 17 of the antennas 1, 2 and 5; the screw axis 18 with cargo balances 19; tip 20 with a screw 21 for fixing the antenna unit to the cardan joint 7; part of the tripod 22; alidade 23 of the horizontal circle of theodolite pipe 10; detachable slotted node 24 traverse the pipe 10; cable 25 connection; coupling a waterproof 26, the receiver 27 (versions may be absent), protective bunker 28 (when using a tripod 22 may be absent).
The proposed device operates as follows.
Perform the tuning of the receiving / transmitting device (Phi is .3).
Under profile shooting tripod 22 have at a given point profiles. When this set up a vertical antenna 1 is strictly Z-axis loads counterbalance 19 using the circular level means 11. Further, the rotating traverse the tube 10 around the vertical axis and watching through her visor brand marker, mounted at the end of the profile, and using alidade 23 and a regular micro screws theodolite, achieve an exact match of the Central risks traverse the pipe 10 with the vertical line marks the rapper, achieving a precision sight of ±1' and, thereby, through the detachable slotted node 24 strictly oriented in the space of the antenna 2, located on the x-axis.
To increase the bandwidth of operating frequencies (wide bandwidth), each of the antennas 1, 2, 5 performed at least three ferrite cores placed on each of the reels 14. Electrostatic screen 15 is used for additional guidance flux density EINS on the coil 14. Execution of the transverse gap 16 in an electrostatic screen 15 increases the effect of guidance.
After you configure all of the receiving / transmitting device And (3) start measurement. Amplifiers (figure 2) amplify the signals produced by the coils 14 of the antennas 1, 2 and 5 which are fed to the filters tunable to scan the entire specified frequency range,for example from 1 to 200 kHz, received by the transmitter for forwarding the signals to the processing device 4. These signals via the receiving / transmitting device and the switch device 4 is coming to an analog-to-digital Converter where it is converted into a digital form. The controller is used to control the operation of peripheral equipment. Signal processing for finding these values of mathematical expressions is performed by the computer (laptop).
In addition, the processing device 4 may generate the control signals from the computer through the controller receives at digital to analog Converter (DAC), and then through the switch and receiver-transmitter device 4 is sent to the receiver (figure 2) transmitting and receiving device and through it to the control unit, which controls the reconstruction filters and functioning transmitters induced in coil 14 of the antennas 1, 2, 5 signals. You can use different functional circuits of the receiving / transmitting device a and the device 4, which are used by the communication channels and methods of processing.
In practice, the device operates as follows.
On the profile or area studies (4, 5) stationary set of the receiving / transmitting devices And measuring electromagnetic field emissions geodynamic nature EINS For ease of reading drawing figure 5 shows the relationship of the receiving / transmitting devices And device 4 processing only for extreme mV stations of each row. The same type of receiving-transmitting devices And the base station(s) B is placed on the surface, obviously free from geodynamic geoelectric inhomogeneities to compensate for the influence model and instrumental noise, the measurement results of the measuring device 4 processing. As already mentioned, the inputs/outputs of transmitter-receiver pairs And can be linked to inputs/outputs of the processing device 4. cable, radio or satellite communication, etc.
Since the magnetic sensors transmitter-receiver pairs, And are three antennas with narrow beam pattern, the form of which drastically depends on the anisotropy of rocks, antenna, located on the X-axis, for all transmitter-receiver pairs And initial in the space traversed by a pipe 10 with an accuracy better than 1 minute strictly in one direction, for example along the axis of preferred orientation of tectonic elements, or along the axis of the pipeline. Any other methods of sight of the antennas in the study of high frequency resolution electromagnetic field emissions (eye, using a compass, surveying compass etc) are incorrect because the error of sight more than 1° results in a measurement error of up to 50% and more.
Then, in the j-th time on the network of points of the i-th profile or monitoring, where the set p is jemo-transmitting devices And, conduct simultaneous, simultaneous measurement of three components of the magnetic field Hx, Hy, Hz receiving-transmitting device and the base station B in the interval of the recorded frequency Δf=1÷200 kHz. Compensate the influence of the model and tool interference device 4 processing using the measured Hx, Hy, Hz with base station B to highlight the useful signals.
The processing device 4 is a server, which computes two main complex amplitude mV frequency parameter tipper Wzx(x, y)=Hz/Hx and wzy data member(x, y)=Hz/Hy, vectors Wiese-Parkinson who find the ratio between the vertical component Hz of the magnetic field and the horizontal components Hx and Hy. Next, build graphs of frequency parameters-tippers Wzx=F(Δf) and wzy data member=F(Δf) fields that relate the spectra of its different components in the same or different locations and being in the frequency domain as the primary data subject to interpretation.
Unit 4 processing next determines by integrating the spectrum of frequencies from 1 to 200 kHz integrated value of the area S1and S2who are the frequency characteristics of the geoelectric conditions in the i-th point of the j-th point in time and provide a full description of the geological environment, its layered structure and the anomalous zones. The behavior of tippers Wzx and wzy data member and complete the parameters S 1and S2judge forms, properties, structure, intensity and location of local inhomogeneities, geodynamic zones high frequency resolution.
In the study of geodynamic zones high frequency resolution based on graphs of frequency dependencies of tippers Wzx and wzy data member build maps of isolines for the j-th moments time and time lag Δt of change of the amplitudes of the signals from different i-x of the points of network monitoring in relation to the signals of the reference station calculates the rate of change of tippers acceleration α~1/2(development-attenuation geodynamic process), which significantly improves the reliability of the forecast activation of dangerous geological processes.
To improve the reliability of the results of the study of high frequency resolution field measurements and their interpretation are performed simultaneously using the installed device 4 processing software that provides control of the receiving / transmitting devices And base stations B collection, transmission of information via radio, GSM or satellite communications, information storage, processing and display on the display server in real time.
The most successful of the claimed device for monitoring local inhomogeneities and geodynamic zones of the upper part of geological section high frequency resolution is industrially applicable for the identification and delineation of the profile shot of the geo is historical local inhomogeneities and for operational monitoring of the VAT in the areas of gas transmission systems in areas of activation dangerous man-made geological processes.
1. Device for the detection of local inhomogeneities and geodynamic zones of the upper part of geological section high frequency resolution, containing two antennas located mutually orthogonal, one of which is oriented vertically and connected to the receiving device, characterized in that the processing device and the third antenna connected to the receiving device and located orthogonal to the above-mentioned two antennas, and the receiving device is equipped with a transmitter, the output of which is connected to the input of the processing device, configured to transmit signals with data about mutually orthogonal components Hx, Hy, Hz flux density natural pulsed electromagnetic field of the Earth on the processing device, and the device processing executed with the ability to calculate two main complex amplitude mV frequency parameters - tippers Wzx(x, y)=Hz/Hx and wzy data member(x, y)=Hz/Hy, whether Wzx=F(Δf) and wzy data member=F(Δf), where Δf is the range of acceptable frequencies are mutually orthogonal components Hx, Hy, Hz, f0to f and with the possibility of integrating dependency Wzx and wzy data member to get them squareandrespectively.
2. The device of claim 1, characterized in that the input universal joint, rod, means for rotating the rod, the first, the second and Retie antenna through vertical antenna is connected to a cardan hinge, which through rod connected to the means of its rotation.
3. The device according to claim 2, characterized in that the introduced traverse the pipe that is installed on the tool rotation rod, and traverse the pipe is made removable.
4. The device according to claim 2, characterized in that the means for guiding the vertical antenna vertically, which is made in the form of a circular level, suspended on the longitudinal axis of the vertical antenna.
5. The device according to claim 2, characterized in that the shell made of the radio waves and sealed in the form of a sphere, and the first, second and third antennas are located in the shell.
6. The device according to claim 1, characterized in that the first, second and third antennas made of ferrite cores placed on them by the coils.
7. The device according to claim 6, characterized in that each of the antennas performed at least three ferrite cores, placed on each of the coils.
8. The device according to claim 6, characterized in that the input electrostatic screen located around the coils.
9. The device according to claim 8, characterized in that the electrostatic screen is made of at least one transverse gap.
FIELD: physics, measurements.
SUBSTANCE: invention relates to exploration geophysics. In compliance with this invention, bottom stations are installed on sea bottom along the line, i.e. profile, covering the area to be explored to form the observation profile (OP), the said station are spaced 1000 m apart. A ship incorporating a generating dipole is directed through the centre of one of electrode separations, close to the centre of explored area area, perpendicular to OP, to form an excitation profile (EP). The electric field magnitudes picked off the bottom station receiving electrodes are referenced to the centre of distance between the appropriate separations of aforesaid bottom station to form an area system of measurement profiles (MO). A one-dimensional inversion is performed for every MO. Proceeding from the data obtained, a 3D geoelectric model of the medium is constructed in units of specific resistance, or specific resistance and parametres of polarisability. Now, proceeding from their abnormalities it is possible to judge upon the presence of a deposit, its position in plan and depth. The ship can carry out researches both with horizontal generating dipole towed on sea surface, and with vertical or horizontal dipole towed on over sea bottom.
EFFECT: reliable forecasting at depths from 0 to 2000 m and deeper.
9 cl, 2 dwg
FIELD: physics; measurements.
SUBSTANCE: present invention pertains to geophysical methods of prospecting. An electromagnetic field is generated through generation of a pseudorandom bipolar sequence of packets of periodical current pulses in a transmitter coil. The value of the cross-correlation function is calculated for components (time derivative) of magnetic or electric field and the current form, either with zero-time shift ΔT between time-sequences of the cross-correlation function or without it. From the values of the cross-correlation function with increment, equal to the period of the current pulses, the impulse reaction of the geoelectric medium is determined, which in turn is used to determine the structure of the geoelectric medium. From the difference of impulse reactions on the background and in the absence of primary magnetic field, objects are identified depending on their induced magnetisation. The generator of electromagnetic field has a dc current source, a rectifier bridge, controlled generator of pseudorandom sequences of time intervals, synchronised by a stabilised clock-pulse generator, and a transmitter coil connected to a current sensor. Between the DC current source and the transmitter coil, a current switch is connected, synchronised by a stabilised clock-pulse generator. The generator of pseudorandom sequences of time intervals is connected to the stabilised clock-pulse generator through a frequency divider. In the second version, the transmitter coil generates recurrent packets of current pulses, uniformly distributed according to a random law on the time interval occupied by the packet. In the second version of the device, the current switch is connected to the generator of recurrent packets, randomly and uniformly distributed during pulses, which in turn is connected to the stabilised clock-pulse generator through a frequency divider.
EFFECT: increased accuracy of data from electrical prospecting and reduced labour input.
15 cl, 5 dwg
FIELD: physics; measurements.
SUBSTANCE: present invention pertains to electrical prospecting using an electrical resistance technique. The invention can be used chiefly, for detecting tectonically crushed, water permeable rocks, detection of ore-bearing objects, covered by loose formations, studying the spread of industrially contaminated underground water in the geological environment etc. One supply ground connection is put at infinity. In a well, several supply ground connections are arranged at a given distance from each other. These connections are successively connected to a current source. For each connection, the potential drop between receiving ground connections are measured using a measurement grid. The apparent electrical resistance values are determined from the potential drop values. Isolines for electrical resistance for all depths where the supply ground connections are drawn up. Presence and position of geoelectric irregularities is determined from the layout of the isolines. Within the boundaries of the detected irregular regions, one of the receiving ground connections is moved around the other. The potential drop between them is measured. In the direction of the receiving line, at maximum voltage value, the spread of linear-stretched irregularities or the position of local objects with increased electroconductivity can be determined.
EFFECT: increased efficiency of detecting irregularities in the geological environment.
2 cl, 2 dwg
SUBSTANCE: method for determination of pneumatic puncher deviation angle from prescribed trajectory includes creation with the help of transmitter and transmitting antenna the electromagnetic field oriented along direction of pneumatic puncher movement. At the output of receive antennas signals are extracted which are proportional to electromagnetic field component strength and which are separated using decoupler and alternatively supplied to receiver input where they are detected and amplified. According to difference of these signals the pneumatic puncher deviation angle from prescribed trajectory is evaluated. As transmitting antenna a nonsymmetric dipole is used where pneumatic puncher is long arm and conducting material disk is short arm which disk is connected to it via dielectric disk. Electromagnetic field directional pattern is created in the form of cone in microwave frequency band against electric component. Deviation angle is evaluated according to difference of signal amplitudes at output of comparing device connected by its input to receiver output and by its output - to indicator.
EFFECT: enhancement of efficiency due to increase in accuracy, range capability and interference resistance relative to external natural and artificial noise.
2 cl, 2 dwg
SUBSTANCE: system includes recorder containing multichannel module of analog signal reception and transform; each channel of module includes low-pass filter, analog amplifier and analog-to-digital converter. The system also includes data control and processing module containing interconnected numeric processor, data memory and master microcontroller with program memory. The recorder contains AD converters overload detectors designed as timing units included in numerical processor. The recorder also contains built-in screen and keyboard assembly, connected through data exchange bus to master microcontroller with program memory of data control and processing module. Differential operational amplifiers with controlled input are used as analog amplifiers in channels of module of analog signal reception and transform. The recorder contains comprised in numerical processor timing units computing signal invariable component in channels of module of analog signal reception and transform. The recorder input contains units, comprised in numerical processor timing, computing signal invariable component in channels of module of analog signal reception and transform. Input of each specified unit is connected through data exchange bus to master microcontroller with program memory, and output is connected through digital-to-analog converter to driving input of differential operational amplifier mounted in corresponding channel of module of analog signal reception and transform.
EFFECT: improved accuracy and reliability of received data and enhanced ease of use.
5 cl, 1 dwg
SUBSTANCE: sound vibrations are generated in a pipeline to cause mechanic vibration of metal pipe fittings in the magnetic field of Earth. Electric E and magnetic H components of induced electromagnetic emission, ground temperature and noise level environment in the medium transported by the pipe are measured. Pipeline is located by the maximum of E-H correlation function. Ground temperature indicates leakage. The device includes acoustic oscillator with magnetostriction exciter, and gauge. The gauge consists of a case with indicator of electromagnetic emission characteristics and digital temperature indicator installed in the front panel of the case. Battery-powered receiver of electromagnetic, thermal and acoustic emission with amplifier and comparator is placed inside. The receiver can be connected with remote thermal sensor, sensor of ground acoustic oscillations with built-in antenna receiving electromagnetic emission parameters, and geomicrophone.
EFFECT: simple and highly reliable search; wider functional capabilities.
2 cl, 1 dwg
SUBSTANCE: low-frequency electromagnetic signal is transmitted through the cable. Near the bottom of the water basin, above the cable and across its route, two identical equally oriented systems of magnetic probes tuned to the same frequency, placed at a fixed distance above each other, are moved. At the axis between the magnetic probe systems, a position transducer is placed, used to measure the angle Θ of deviation of this axis from the vertical. Under the lower magnetic probe system, an ultrasonic transducer is placed, used to measure the distance from it to the water basin bottom surface h. The signals from the magnetic probes, the position transducer, and the ultrasonic transducer, are sent to the processing unit. The underwater cable laying depth d is determined using the formula where D is the distance between the magnetic probe systems; α=EL/EU is the ratio of the magnetic field intensity measured by the lower magnetic probe system to the magnetic field intensity measured by the upper magnetic probe system.
EFFECT: increased accuracy and decreased cost.
FIELD: electric geological exploration.
SUBSTANCE: before submergence, clocks installed on the current dipole and the bottom stations are synchronized. The dipole is placed vertically, so that its upper end would be at a distance of no more than 200 metres from the sea surface, and the lower end would be no more than 100 m from the sea bottom (optimally, 20-30 m from the sea bottom). The dipole is excitated with alternating rectangular pulses. The bottom stations are used to record the sweep of the horizontal and vertical field components in time when the current is applied and when it is absent. During signal analysis, the change of primary and secondary fields in time is taken into account and data describing the medium resistance and its polarisation characteristics are determined. The system of equipment includes vessel with a generator and energising field generation unit, which are connected with a vertical dipole with current electrodes, submerged in water, and an onboard data recording and processing unit, using a cable. The system also includes set of bottom stations with horizontal and vertical electrodes and magnetic field sensors. The dipole and the bottom stations are equipped with clocks supporting synchronization.
EFFECT: possibility to obtain data about specific resistance and polarisability of strata during exploration of deep water areas, and provision of more accurate predictions.
3 cl, 1 tbl, 5 dwg
FIELD: technologies for measurement of specific electric conductivity of sea bottom.
SUBSTANCE: the system contains a large number of blocks, each block representing a unit, made with possible positioning in place on sea bottom for measuring horizontal electrical and magnetic fields. To the block unit, a vertically oriented rigid bar is attached and stretched vertically from it. The bar has a pair of electrodes, shifted vertically, which form a vertically oriented dipole antenna. The electrodes are in electric connection with the amplifier positioned inside the unit. Signal from the amplifier is dispatched to data registration processor, which is also positioned inside the unit. By means of the processor, time series of amplified signals of electric and magnetic fields are accumulated over a given time period.
EFFECT: usage of vertical field for measuring transverse changes in the geological structure of sea bottom.
4 cl, 4 dwg
FIELD: measurement technology; specifying cable laying route.
SUBSTANCE: low-frequency electromagnetic signal is transmitted over cable. Two identical sets of magnetic field sensors are disposed at fixed distance from one another above cable, one on top of other. One of sensors in each set is oriented to receive vertical component of magnetic field strength and two other ones, to receive relatively perpendicular horizontal components. Sensors of top and bottom sets are positioned identically to receive horizontal components. Sensors are displaced over cable perpendicular to its route. Levels of resultant magnetic-field horizontal component received by sensors of top and bottom sets are measured. Difference between these levels are calculated. Difference between levels of vertical-component strengths measured by sensors of top and bottom sets are measured. Cable laying route is specified at point where mentioned differences in layers for horizontal and vertical magnetic-field components coincide.
EFFECT: enhanced precision of specifying cable route.
1 cl, 1 dwg
FIELD: measuring equipment, applicable in agricultural equipment.
SUBSTANCE: the inductance transducer during operation generates interferences which being amplified by an amplifier-filter may cause actuation of the flip-flop and actuator. The maximum interference signal is produced at the instant of passage of the harvester roll weld above the inductance transducer. At this moment the position pickup generates a compensating signal, which is subtracted in the amplifier from the signal of the inductance transducer. Thus, the signal used for comparison with the set point does not contain interferences.
EFFECT: simplified adjustment of the system, enhanced sensitivity, noise immunity.
7 cl, 6 dwg
FIELD: geophysics, in particular, paleomagnetism.
SUBSTANCE: the position of the interfaces formed by inversions of the geomagnetic field is determined by pulse radar detection and ranging of the magnetic field with the aid of radar units with a power potential of 500 to 600 dB. The radiating and receiving devices of the radar units include horizontal magnetic dipoles. The interfaces are separated by comparison of the data of pulse radar detection and ranging of the magnetic field and pulse radar detection and ranging of the electric field.
EFFECT: remote determination of interfaces formed by inversions of the geomagnetic field in ice layers, enhanced depth of survey.
FIELD: geophysical electric prospecting.
SUBSTANCE: method can be used for ac geophysical electric prospecting which current is induced in ground by inductive method; method can be used for searching and prospecting objects as in non-conducting and conducting media. Low-frequency electromagnet field is induced by current running in non-grounded loop onto day surface of Earth. Phase shifts of components of magnetic induction are measured at preset height for parallel profiles relatively vertical component of magnetic induction along profile crossing epicenter of loop and being perpendicular to parallel profiles. Availability of abnormal conducting objects in Earth is determined from structure in phase shifts at the area.
EFFECT: improved precision of measurement; improved efficiency of aerial prospecting.
SUBSTANCE: method comprises generating low-frequency electromagnetic field with the use of ungrounded loop at the day earth surface, measuring Cartesian components of magnetic induction from parallel profiles at given levels, measuring real and imaginary parts of the Cartesian components of the magnetic induction with respect to the phase of the vertical component of the magnetic induction in the epicenter of the ground loop, determining deviations of measured components from the normal values for a homogeneous medium, and determining sections of increased electric conductivity from the sign and magnitude of these values.
EFFECT: enhanced accuracy and efficiency of measuring.
SUBSTANCE: method is based on measurements of electric field, excited using two electrodes. Distanced along supposed subject. Direction of field strength vector is determined on basis of results of measurements of its components in two orthogonal directions. As interpretation parameters value of difference of azimuths of strength vector observed and background, appropriate for homogenous substance, of electric fields, are used. On basis of character of deviation of force lines from background values, presence and position of non-homogenous areas is evaluated and detected.
EFFECT: broader functional capabilities.
FIELD: test equipment.
SUBSTANCE: system for finding coordinates of track and coordinates of defects of underground pipeline has navigation satellites and starting chamber marker. The latter has navigation receiver, processing and mating units, data storage, receiving chamber marker and track marker connected in series. Mentioned markers have marker receiver and navigation receiver connected in series with processing and mating unit, data storage and intra-pipe inspection tool. The latter has flaw detection module, synchronized reference generator, marker transmitter, route detector, computational and control unit, registrar, angular speed three-component meter, three-component accelerator and longitudinal accelerator, on-ground subsystem. Before making starting intra-tube inspection tool started, its sync reference generator is synchronized with time scale of satellite radar system. Data from flaw detector module is recorded into data registrar by means of intra-tube inspection tool, as well as in registrar of three-component angular speed meter, three-component accelerometer, longitudinal accelerometer, route detector, temperature detector and current time detector. Radar parameters and current time are recorded in marker of starting chamber. Radar parameters, time of passing of inspection tool and current time are recorded route markers and marker of starting chamber. Coordinate of pipeline and coordinates of flaws are calculated in on-ground subsystem on the base of stored data.
EFFECT: improved precision of coordinate finding.
FIELD: diagnosis and control.
SUBSTANCE: as source of electromagnetic field of cathode protection of pipeline is used. Depth of position of pipeline axis is determined on basis of magnetic transverse, longitudinal and vertical components of electromagnetic field of current of cathode protection of pipeline. longitudinal electric component of electromagnetic current field of cathode protection is measured and transverse component of electromagnetic field of current of cathode protection on the left and right from pipeline axes. Results of measurements are made normal for depth of pipeline, resistance of environment, surrounding pipeline, current force in pipeline, background components of electromagnetic fields. On basis of heightened values of normal electric components of electromagnetic field of cathode protection current position and size of disruptions of isolating cover of pipeline are detected.
EFFECT: higher efficiency.
FIELD: pipeline construction technologies.
SUBSTANCE: method shows presence and location of defects of metallic pipelines, includes measuring above pipeline in given points during movement of magnetic field vectors in rectangular coordinates, by at least two three-component sensors, tensor of magnetic field gradients is built, by matrix transformation received information is processed, on basis of results background value is estimated and deviations from this value, on basis of difference of which for given criterion value from background value presence and location of defects of metallic pipelines is decided and magnetic graph is built to show location of defects. Device for realization of method has registration sensors system, quartz generator, frequency divider, analog-digital converter, control block, threshold block, sound and light indication block, automatic battery charge indicator, block for calculation of magnetic field gradients, block for showing information, recording device segment, recording control block, situation alignment block, block for satellite absolute geographic alignment GPS, block for selecting recording segment.
EFFECT: broader functional capabilities, higher trustworthiness, higher efficiency.
2 cl, 4 dwg
FIELD: electro-surveying by inductive profiling method, possible use for studying composition of upper part of geological cross-section.
SUBSTANCE: method uses electromagnetic field source and receiving magnetic indicator distanced from one another. Mutual orientation of electromagnetic field source and receiving magnetic indicator is such, that in normal secondary electromagnetic field, excited in radiated geo-electric section without homogeneousness, measured component of magnetic field strength is close to zero. Profiling is performed by means of horizontal displacement relatively to boundary of earth-air splitting simultaneously of source of electromagnetic field and receiving magnetic indicator with discontinuous or continuous registration of abnormal component of magnetic field. On basis of its distribution, presence of geo-electric non-homogeneousness is determined.
EFFECT: increased efficiency and resistance to interference, decreased laboriousness.
FIELD: technology for finding deposits of oil and gas, possible use for finding hydrocarbon resources in carbon rocks of foundation of oil-gas containing precipitation beds.
SUBSTANCE: method includes taking samples from oil and gas bearing area with carbon foundation, adjacent to subterranean continental paleorift. Magnetic susceptibility of these is measured. On appearance of magnetic susceptibility values within range 13,0·106-31,0·106 presence of deposits is determined.
EFFECT: increased precision of finding deposits in carbon rocks of foundation, simplified method, lower costs.