RU2219561C2 - Method and device for directional parametric reception of weak signals in media - Google Patents

Method and device for directional parametric reception of weak signals in media Download PDF

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RU2219561C2
RU2219561C2 RU2001119209A RU2001119209A RU2219561C2 RU 2219561 C2 RU2219561 C2 RU 2219561C2 RU 2001119209 A RU2001119209 A RU 2001119209A RU 2001119209 A RU2001119209 A RU 2001119209A RU 2219561 C2 RU2219561 C2 RU 2219561C2
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frequency
low
signal
vector
input
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RU2001119209A
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RU2001119209A (en
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Л.С. Виленчик
Ю.В. Иванов
В.П. Трофимов
Г.Н. Корольков
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Федеральное государственное унитарное предприятие Московское конструкторское бюро "Электрон"
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Abstract

FIELD: radio engineering, directional parametric reception of weak signals in media. SUBSTANCE: invention can find use in parametric converters and antennas with three-wave mechanism of interaction of waves, it can also be employed in underwater acoustics, in seismology, architectural acoustics, nondestructive testing, for diagnostics of mechanisms and machines by acoustic methods. Achievable technical result of invention lies in provision for invariance of directional parametric reception in media and for optimal control over pumping signal by supply of high-frequency pumping signal to inputs of nonlinear hardness of units of converters of oscillatory speeds and pressure when case of vectorphase receiver vibrates together, in determination of density vector of flux of power of low- frequency signal and in establishment of space coordinates of position of low-frequency source by maximal value of density vector of flux of power. Characteristic feature of invention consists in supply of weak signal of low-frequency source to case of vector-phase receiver vibrating jointly and of high-frequency pumping signal to nonlinear hardness of converters of parameters of acoustic field: oscillatory speed of particles of medium and pressure structurally coupled to radiating piezoconverter. Cross-modulated signal of parametric interaction of waves is received, low-frequency component of signal is extracted and used to compute by it vector of density of flux of power of low-frequency source employed to establish coordinates of source which secures detection of source of weak signal in media and its indication. Decamouflaging factor coupled to usage of high-power high-frequency radiator of pumping signal is eliminated. EFFECT: precise establishment of space coordinates of low-frequency sources of acoustic signals in such media as submarines in hydrosphere, downhole tools drilling holes in lithosphere, acoustic radiators of industrial and structural noises in atmosphere. 2 cl, 18 dwg

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Текст описания в факсимильном виде (см. графическую часть) Тб Description text in facsimile form (see graphic part) Tb

Claims (2)

1. Способ направленного параметрического приема слабых сигналов в средах, состоящий в генерации и излучении в воду высокочастотного сигнала накачки, возбуждении в воде волн параметрического взаимодействия волны высокой частоты накачки и волны низкой частоты слабого сигнала, распространяющейся встречно коллинеарно волне накачки, приеме кроссмодулированных сигналов волн взаимодействия приемным преобразователем давления, расположенным со стороны излучателя накачки, и селекции блоками задержки и корреляторами низкочастотной составляющей кроссмодулированных сигналов, отличающийся тем, что высокочастотный сигнал накачки подают на входы нелинейных жесткостей блоков преобразователей давления и преобразователей колебательных скоростей, расположенных по декартовым осям комбинированного с соколеблющимся корпусом векторно-фазового приемника, а слабый низкочастотный сигнал - на соколеблющийся корпус комбинированного векторно-фазового приемника, определяют значение вектора плотности потока мощности низкочастотной составляющей кроссмодулированного параметрического резонансного сигнала взаимодействия волн, по которому варьируют изменением параметров высокочастотного сигнала накачки так, чтобы вектор плотности потока мощности низкочастотного сигнала достиг максимальной величины и по его максимальному значению определяют в среде местоположение низкочастотного источника.1. The method of directional parametric reception of weak signals in media, which consists in generating and emitting into the water a high-frequency pump signal, exciting in the water waves of parametric interaction of a high-frequency pump wave and a low-frequency wave of a weak signal propagating counter-collinear pump wave, receiving cross-modulated interaction wave signals receiving pressure transducer located on the side of the pump emitter, and selection by delay units and low-frequency component correlators cross-modulated signals, characterized in that the high-frequency pump signal is fed to the inputs of nonlinear stiffnesses of the blocks of pressure transducers and transducers of vibrational velocities located along the Cartesian axes of the vector-phase receiver combined with the oscillating housing, and a weak low-frequency signal is transmitted to the oscillating housing of the combined vector-phase receiver determine the value of the vector of the power flux density of the low-frequency component of the cross-modulated parametrically of the resonance signal wave interaction by which a change can vary high pump signal parameters so that the baseband signal vector power density reached a maximum value and its maximum value is determined in a medium of low frequency source location. 2. Устройство для осуществления способа по п.1, содержащее скомбинированный с соколеблющимся корпусом векторно-фазовый приемник, содержащий блоки преобразователей колебательных скоростей и давления и блок нелинейных жесткостей преобразователей колебательных скоростей и давления, блок пространственной ориентации декартовых осей комбинированного с соколеблющимся корпусом векторно-фазового приемника, а также блоки предварительных усилителей с фильтрами нижних частот, аналого-цифровые преобразователи и блоки быстрого преобразования Фурье (БПФ) колебательных скоростей и давления соответственно, генератор высокочастотных сигналов накачки, усилитель мощности, излучающий пьезопреобразователь, блок следящего определения значений текущих параметров высокочастотного сигнала накачки, ключ, запоминающий блок значений параметров сигнала накачки, программный блок, вычислительный блок и регистратор, нелинейные жесткости преобразователей колебательных скоростей и давления соединены с выходом излучающего преобразователя и с входами преобразователей колебательных скоростей и давления механически, электрические выходы блоков колебательных скоростей и давления соединены соответственно с первым и вторым входами вычислительного блока через подключенные последовательно блоки предварительных усилителей и фильтров нижних частот, аналого-цифровые преобразователи и блоки БПФ, третий вход вычислительного блока соединен с выходом блока пространственной ориентации декартовых осей комбинированного с соколеблющимся корпусом векторно-фазового приемника, выход генератора высокочастотных сигналов накачки подключен к входу излучающего пьезопреобразователя через соединенный последовательно усилитель мощности и к первому входу программного блока через соединенные последовательно блок следящего определения текущего значения параметров высокочастотного сигнала накачки, ключ, подключенный своим первым входом, и запоминающий блок значений параметров сигнала накачки, первый выход вычислительного блока подключен к входу регистратора, а второй соединен с вторым входом ключа, на второй вход программного блока подают команды выбора режимов генератора высокочастотного сигнала накачки, а на четвертый вход вычислительного блока подают уставку координат местоположения векторно-фазового приемника по меркаторской сетке.2. The device for implementing the method according to claim 1, containing a vector-phase receiver combined with a oscillating housing, comprising vibrational velocity and pressure transducer blocks and a nonlinear stiffness block of vibrational velocity and pressure transducers, a spatial orientation unit of Cartesian axes combined with a vector-phase oscillating transducer receiver, as well as pre-amplifier blocks with low-pass filters, analog-to-digital converters and fast conversion blocks Fourier (FFT) vibrational velocities and pressures, respectively, a generator of high-frequency pump signals, a power amplifier emitting a piezoelectric transducer, a unit for tracking determination of the current parameters of a high-frequency pump signal, a key, a storage unit for the values of the pump signal parameters, a program unit, a computing unit and a recorder, nonlinear stiffnesses transducers of vibrational velocities and pressure are connected to the output of the radiating transducer and to the inputs of the transducers of vibrational soon mechanical pressure, the electrical outputs of the blocks of vibrational velocities and pressure are connected respectively to the first and second inputs of the computing unit through series-connected blocks of preamplifiers and low-pass filters, analog-to-digital converters and FFT blocks, the third input of the computing block is connected to the output of the spatial orientation block Cartesian axes combined with a oscillating housing of a vector-phase receiver, the output of the generator of high-frequency pump signals it is connected to the input of the emitting piezoelectric transducer through the power amplifier connected in series and to the first input of the program unit through the serially connected tracking unit for determining the current value of the parameters of the high-frequency pump signal, the key connected to its first input and the storage unit for the values of the pump signal parameters, the first output of the computing unit is connected to the recorder’s input, and the second is connected to the second key input, gene mode selection commands are sent to the second input of the program unit Rathore high pump signal and the fourth input of the computing unit is supplied setpoint position coordinates vector-phase receiver of Mercator grid.
RU2001119209A 2001-07-12 2001-07-12 Method and device for directional parametric reception of weak signals in media RU2219561C2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2509320C1 (en) * 2012-11-16 2014-03-10 Федеральное государственное бюджетное учреждение науки Тихоокеанский океанологический институт им. В.И. Ильичева Дальневосточного отделения Российской академии наук (ТОИ ДВО РАН) Digital composite vector receiver with synthesised channels
CN113625338A (en) * 2021-08-11 2021-11-09 成都理工大学 Seismic weak signal extraction method based on difference

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2509320C1 (en) * 2012-11-16 2014-03-10 Федеральное государственное бюджетное учреждение науки Тихоокеанский океанологический институт им. В.И. Ильичева Дальневосточного отделения Российской академии наук (ТОИ ДВО РАН) Digital composite vector receiver with synthesised channels
CN113625338A (en) * 2021-08-11 2021-11-09 成都理工大学 Seismic weak signal extraction method based on difference
CN113625338B (en) * 2021-08-11 2023-07-11 成都理工大学 Differential-based seismic weak signal extraction method

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