• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An improved seismic array is provided which has the capability to supply data to adjacent recording stations simultaneously. The seismic array has a plurality of seismic detector connection points, and a seismic detector is located at each seismic detector connection point. Dual weighting of the output of each seismic detector in thearray is achieved by connecting dual resistors to the output of each seismic detector. Two pairs of wires are also provided in the array, and one pair of wires interconnects one weighted output of each seismic detector to the first end of the array. The second pair of wires interconnects the second weighted output to the second end of the array. An amplifier is provided for use at either or both ends of the array, and a feedback network, including a resistor, is associated with the amplifier. The ratio of the value of the resistance in the feedback network to the weighting resistor at the seismic detector determines the magnitude of the signal appearing at the output of the amplifier from the response of that seismic detector. A Chebychev weighted array is achieved by a proper selection of resistor values.
    公开号:SU1223848A3
    申请号:SU772451150
    申请日:1977-02-09
    公开日:1986-04-07
    发明作者:Х.Мэйн Уильям；С.Бэдгер Алгернон；С.Хавес Уильям
    申请人:Джиосорс,Инк (Фирма)；
    IPC主号:
    专利说明:

    A given set of relations contains equal elements.
    3. The seismic group according to claim 1, wherein it is clear that a given set of relations contains elements that are Chebshev weighting factors.
    4. The seismic group of claim 1. characterized by the fact that
    The invention relates to seismic exploration and can be used to create seismic groups having bi-directional capabilities.
    One of the problems of seismic exploration is the presence of horizontally propagating wave-to-noise.
    A seismic group is known by which the effect of suppressing horizontally propagating interference waves can be reduced. In this device, to achieve the effect, the relative sensitivity of the geophones is attached to the group itself and selected according to the provisions of the well-known antenna theory. This device operates in accordance with the principle of a narrowing sensitivity, in which the sensitivity of the sensor in this group decreases towards either end of the group from the center point. The sensors are located radially relative to the energy source for generating the signal l.
    The closest in technical essence and the achieved result to the invention is a seismic group containing a plurality of connection points, and at each connection point a seismograph, pairs of wires and resistors. The values of the resistors constituting the voltage divider circuit are chosen in such a way that the seismograph at the center of the group has the highest sensitivity, while the seismographs at the ends of the groups have the lowest sensitivity .2,
    However, the known seismic groups do not have the property of two directions, and when they are used, the number of seismographs connecting points is equal to ten.
    5. The seismic group according to paragraphs 3 and 4, of which is that the given set of relations contains elements that are numerically equal to 1.00, respectively; 0.96; 0.88; 0.77; 0.65; 0.51; 0.38; 0.26; 0.17 and 0.12.
    2
    difficulties in maintaining a constant damping factor of 1 between all seismographs in a group.
    The aim of the invention is to provide the property of group bi-directionality.
    The goal is achieved in that a seismic group containing multiple connection points, and at each connection point a seismograph, a pair of wires and resistors, has two amplifiers and two feedback circuits, with the first resistor at each connection point of the seismograph being connected to one end the seismograph output, the second resistor at each seismograph connection point is connected at one end to the seismograph output 2, the first pair of wires connects the seismograph connection points and leaves the first end of the seismic In the first group, the first wire is connected to the other end of the first resistor at each point of the seismograph and the second wire to the other end of the second resistor, the first amplifier is connected to the first wire pair at the first end of the group, the first feedback circuit contains a resistor which is connected to the first amplifier, and the ratio of the resistance value of this resistor to the resistance values of the first and second resistors at each point of the seismograph connection corresponds to a given set of relations and I ate the signal strength, an appearing at the output of the amplifier as a result of reaction of each seismograph, a third resistor connecting point in each seysmogra
    One end of the connection is connected to one output of each seismograph, the fourth resistor at each connection point of the seismograph is connected to the other output of the seismograph at one end, the second pair of wires connects the connection points of the seismograph and leaves the second end of the seismic group of the second resistor in each seismograph connection, and the second wire of the second pair is connected to the other end of the fourth resistor, the second amplifier is connected to the second pair of wires at the second end of the group The second feedback circuit contains a resistor that is connected to the second amplifier, and the ratio of the resistance value of this resistor to the resistance values of the third and fourth resistors at each seismograph connection point corresponds to a given set of ratios and determines the magnitude of the signal that appears at the output of the second an amplifier as a result of the reaction of each seismograph.
    At the same time, a given set of relations may contain equal elements or elements, which are the Chebishyaev weight coefficients, and for the case when the number of connection points of seismographs is equal to ten, the given set of relations contains elements that are numerically equal to 1.00, respectively; 0.96; 0.88; 0.77; 0.65; 0.51; 0.38; 0.26; 0.17 and 0.12.
    Figure 1 shows an electrical diagram of one of the options for implementing a seismogroup; Fig. 2 shows a preferred embodiment of an amplifier for use of the indicated variant of the seismogroup; FIG. 3 is a diagram of a four-channel recording system.
    The seismic group (Fig. 1) contains a plurality of seismograph 2 connection points 1, shunted by resistors 3, resistors 4 and 5, a pair of 6 wires, resistors 7 and 8, a pair of 9 wires, amplifier 10 with feedback circuit 11 and amplifier 12 with feedback circuit 13.
    The amplifier (Fig. 2) contains operational amplifiers 14 and 15, shunted by feedback resistors 16 and 17, respectively, and capacitors 18 and 19, resistors 20 and 21, and condensers
    ten
    20
    25
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    55
    223848
    a capacitor 22 and a resistor 23, chokes 24-27, resistors 28-31, and capacitors 32 and 33.
    The four-channel recording system circuit (FIG. 3) contains, in addition to the five seismic groups, four seismic stations 34, a multi-pair cable 35 and seismograph sensitivity groups in the groups.
    Each seismograph of the group shown in Fig. 1 has two outputs, one end of which has a resistor 4 connected to one end and a resistor 5 to the other. The other ends of these resistors are connected to a pair of 6 wires. Resistors 7 and 8 one end-. MI connected to the outputs of the seismograph, and the other - with a pair of 9 wires. At the ends of the pairs 6 and 9 wires, amplifiers 10 and 12 are connected, respectively.
    In the amplifier (FIG. 2), the resistors 16 and 17 are connected between the inverting input and the output of the operational amplifiers 14 and 15, and the capacitors 18 and 19 are connected in parallel with these resistors. Resistors 20 and 21, which limit the current, are connected to the outputs of the operational amplifiers by one end, and the free ends of the series-connected capacitor 22 and resistor 23 are connected to the free ends of resistors 20 and 21. The capacitor 22 prevents the appearance of a DC bias in the signal at the output of the amplifier, and the resistor 23 creates a capacitor discharge circuit, the nominal value of its resistance is 10 kΩ and the output signal is removed from it. The preferred value of the capacitor capacitance is 22-56 microfarads. The inductors 24-27 are connected in series with each resistor 28-31, respectively, and the free ends of the resistors are connected to the inverting inputs of the operational amplifiers. The capacitor 32 is connected between the free ends of the chokes 25 and 26, and the capacitor 33 between the free ends of the chokes 24 and 27. Non-inverting inputs of operational amplifiers of the zazeklenich Inductance of chokes is preferably 10 mH, the capacitance of the 32 and 33 is of the order of 0.1 μF, and the resistance of resistors 562 Ohm
    thirty
    35
    40
    45
    50
    The inputs of each seismic station 34 (FIG. 3) are connected to the outputs of two
    seismic groups, and their outputs are combined with a multi-pair cable 35.
    The embodiment of the amplifier shown in FIG. 2 is mainly intended for use with the seismogram shown in FIG. 1, and one or two seismogroups can be connected to the inputs of this amplifier. The output of one seismogroup can be connected to the ends of throttles 24 and 27, and the output of the second seismogroup to the ends of throttles 25 and 26. The outputs of the connected seismogroups are summed up at the inputs of operational amplifiers. A separate LRC circuit consisting of chokes, a resistance and a capacitor mounted at the input of each of the operational amplifiers 14 and 15 reduces the connection between the outputs of the groups connected to the inputs of the amplifiers of this configuration. In the absence of this chain, there could be a transitional effect between seismic groups.
    The options given do not exhaust the possibilities of implementing seismogroups, amplifiers and recording systems. The principle on which this invention is based allows the construction of variants of the indicated elements depending on the task.
    To implement the scheme shown in FIG. 3, four seismic stations and five seismic groups / each group consists of ten seismographs are needed. The total band length and the distance between the seismographs depend on the wavelength of interference to be suppressed. The length of each seismic group should be greater than the seismic wavelength of interference, which has the lowest frequency, and the distance between seismographs in the group should be less than
    or equal to the wavelength of interference, which has the highest frequency. With such a choice of seismic group parameters, the extremes of the highest of the unwanted frequencies do not occur at the adjacent seismograph junction points, and the extremes of the lowest of the unwanted frequencies do not appear simultaneously at the ends of the group. For a variant with ten seismographs, a seismogroup 90 m long with a distance of 10 m between seismographs is represented.
    Let the wire of pair 9, connected by resistor 7, be connected to the end of drossel 24, and the wire connected to resistor 8, be connected to the end of drossel 27. In this case, the signal value appearing at the output of operational amplifiers 14 and 15 from the response of any seismograph is determined by the ratio of the resistance of the resistor 16 to the resistance of the resistor 7 and the ratio of the resistance of the resistor 17 to the resistance of the resistor 8. Chebyshev weighting of the seismic group's sensitivity can be ensured by selecting the indicated resistance ratios of these resistors. A similar operation should be done with a pair of 6 wires of another seismic group and the second input of the amplifier. The unused ends of the outermost groups must be short-circuited, and the internal groups of the entire system operate in a bidirectional mode.
    If necessary, the attenuation coefficient of seismographs in a group can be set constant. Moreover, if the sensitivities of seismographs are determined by the same weighted coefficients, the same attenuation coefficient is achieved by short-circuiting both ends of the groups.
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    about i
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    Editor I. Nykszlaychuk
    Compiled by E. Volkonsky
    Tehred I. Veres Proofreader A.Ferents
    Order 1728/62 Circulation 728 Subscription
    VNIIPI USSR State Committee
    for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5
    Branch PPP Patent, Uzhgorod, Proektna St., 4
    权利要求:
    Claims (5)
    [1]
    1. A SEISMIC GROUP containing many connection points, and at each connection point - a seismograph, pairs of wires and resistors, characterized in that, in order to ensure the bidirectionality of the group, two amplifiers and two feedback circuits are introduced into it, the first resistor in each seismograph connection point is connected at one end to one seismograph output, a second resistor at each seismograph connection point is connected at one end to the seismograph output, the first pair of wires connects the seismic connection points of graphs and leaves the first end of the seismic group, the first wire of the first pair is connected to the other end of the first resistor at each point of connection of the seismograph, and the second wire of the first pair is connected to the other end of the second resistor, the first amplifier is connected to the first pair of wires at the first end of the group, The feedback loop contains a resistor that is connected to the first amplifier, and the ratio of the resistance value of this resistor to the resistance values of the first and second resistors at each point of connection of the seismograph corresponds to a given set of relations and determines the magnitude of the signal that appears at the amplifier output as a result of the reaction of each seismograph, the third resistor at each seismograph connection point is connected at one end to each output of the seismograph, the fourth resistor at each seismograph connection point is connected at one end to the other output of the seismograph, the second pair of wires connects the connection points of the seismographs and leaves the second end of the seismic group, the first wire of the second pair is connected to the other end the third resistor at each point of the seismograph connection, and the second wire of the second pair is connected to the other end of the fourth resistor, the second amplifier is connected to the second pair of wires at the second end of the group, the second feedback circuit contains a resistor that is connected to the second amplifier, and the resistance ratio of this resistor to the resistance values of the third and fourth resistors at each connection point of the seismograph corresponds to a given set of relations and determines the value of the signal appearing at the output of the second tel as a result of the reaction of each seismograph.
    [2]
    2. The seismic group according to claim 1, characterized in that the given set of relations contains equal elements.
    [3]
    3. The seismic group according to claim 1, characterized in that the given set of relations contains elements that are Chebyshev’s weighting coefficients.
    [4]
    4. The seismic group according to claim 1, characterized in that the number of connection points of the seismographs is ten.
    [5]
    5. A seismic group according to paragraphs 3 and 4, which is so called that the given set of relations contains elements numerically equal respectively to 1.00; 0.96; 0.88; 0.77; 0.65; 0.51; 0.38; 0.26; 0.17 and 0.12.
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US2266040A|1937-09-16|1941-12-16|Cons Eng Corp|Geophysical prospecting receptor circuits|
    US2623113A|1951-11-01|1952-12-23|Standard Oil Dev Co|Seismic prospecting with optimum geophone coverage|
    US2698927A|1953-07-13|1955-01-04|Olive S Petty|Seismic surveying|
    US2747172A|1954-11-12|1956-05-22|Exxon Research Engineering Co|Geophone arrangement for seismic prospecting|
    US3096846A|1958-12-31|1963-07-09|Western Geophysical Co|Method and apparatus for seismographic exploration|
    GB1046771A|1962-01-19|1966-10-26|Seismograph Service England|Improvements in methods of and apparatus for echo-ranging|
    US3317891A|1964-07-08|1967-05-02|Atlantic Refining Co|Resistance-type line detector|
    US3335401A|1966-01-07|1967-08-08|Mobil Oil Corp|Noise-filtered detection of marine seismic signals|
    US3786410A|1971-12-27|1974-01-15|Mark Products|Seismic cable assembly|
    US3863200A|1973-01-15|1975-01-28|Amoco Prod Co|Built-in seismometer amplifier|
    US3863201A|1973-05-29|1975-01-28|Amoco Prod Co|Seismometer arrays using operational amplifiers|
    US3887897A|1973-07-23|1975-06-03|Texas Instruments Inc|System for changing seismic detection array lengths|
    US3916371A|1973-08-31|1975-10-28|Amoco Prod Co|Remote seismometer controller|
    US4024492A|1976-02-09|1977-05-17|Geosource Inc.|Seismic array|GB1550701A|1975-05-12|1979-08-15|Western Geophysical Co|Seismic data processing system and method|
    US4024492A|1976-02-09|1977-05-17|Geosource Inc.|Seismic array|
    US4276620A|1978-10-27|1981-06-30|Geosource Inc.|Method and apparatus for obtaining a composite field response _to a variable source array using weighting coefficients|
    CA1170756A|1980-11-17|1984-07-10|Donald W. Harvey|Remote seismic data system|
    US4644795A|1985-07-29|1987-02-24|Advanced Technology Laboratories, Inc.|High resolution multiline ultrasonic beamformer|
    DE3617847C1|1986-05-27|1987-02-26|Wasagchemie Sythen Gmbh|Ground listening device with at least one three-component geophone probe|
    US5243469A|1990-11-14|1993-09-07|Union Oil Company Of California|System for the acquisition of seismic data|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US05/656,528|US4024492A|1976-02-09|1976-02-09|Seismic array|
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