Excitation circuits for non-expensive transducer arrays

FIELD: medicine.

SUBSTANCE: group of inventions includes a device, a permanent machine-readable medium, and a method for ultrasonic imaging device operation. The device contains an array of transducer elements distributed to a plurality of groups for group work, and a processor configured to control the operation of the transducer elements array. The transducer elements array is controlled by the processor for visualization. The said array is used in parallel and in time with the use of transducer elements of the current one of the said groups of the plurality of transducer elements. Visualization is performed element-by-element independently. The groups of plurality of transducer elements are arranged in pairs in space with respect to each other to be element-wise connected to each other. Each group of plurality transducer elements only contains nonadjacent transducer elements, grouped according to the status of spatial location for all pairs of transducer elements of the first group, one or more transducer elements from one or more other groups are located between two transducer elements of a pair of transducer elements. Each transducer elements from the transducer elements array has a surface with a geometric center. The transducer elements from the transducer elements array are arranged so that the line passing through the geometric centers of at least some of the transducer elements of one group does not completely surround the transducer elements of any other group.

EFFECT: group of inventions allows automated, simple, low-interference ultrasonic visualization through non-phased visualization and independently, as well as through distribution of transducer elements by groups of multiple discontinuous transducer elements, and due to the fact that the line passing through the geometric centers of some transducer elements of one group does not completely surround the transducer elements of any other group.

17 cl, 9 dwg

 



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: system for preventing hazardous proximity of ships uses a shared marine information space and comprises a shipborne automated identification system (AIS), which includes main and additional AIS units, an additional on-board computer, a control and display panel, a shipborne ultra-short wave communication antenna and a power supply. The main unit of the AIS has ports for receiving signals from external information communication devices in the form of an antenna, an external receiver, a gyrocompass, a ship turning speed sensor, a differential correction sensor, an electronic map navigation-information system, a pilot port device and a long distance channel. Said unit is connected to the control and display unit, the output of the shipborne ultra-short wave communication antenna and the power supply.

EFFECT: designing a system for preventing hazardous proximity of ships, providing automatic communication between all involved ships.

3 dwg

FIELD: physics, navigation.

SUBSTANCE: invention refers to radar engineering. The disclosed method is carried out using a transponder, a transmitter and a receiver of a scanning device. The transmitter of the scanning device comprises a driving generator1, a modulating code generator 2, a phase-shift modulator 3, a power amplifier 4 and a transmitting antenna 5. The transponder is an interdigital transducer of surface acoustic waves (SAW) and comprises two comb-type electrode system 8, buses 9 and 10, reflectors 11 and a microstrip antenna 7. The microstrip antenna 7, electrodes 8, buses 9 and 10, reflectors 11 are deposited on the surface of a piezoelectric crystal 6. The receiver of the scanning device comprises receiving antennae 12-16, high frequency amplifiers 17-21, heterodynes 22 and 50, mixers 23 and 51, intermediate frequency amplifiers 24 and 52, spectrum analysers 25 and 27, a phase doubler 26, a comparator unit 28, switches 29 and 55, a phase halver 30, narrow band-pass filters 31, 37, 38, 39 and 40, a phase detector 32, multipliers 33-36, phase meters 41-44, subtractors 45 and 46, adders 47 and 48, a recording unit 49, a correlator 53 and a threshold unit 54.

EFFECT: high selectivity and noise-immunity of the receiver of the scanning device by suppressing spurious signals (noise) received over image and combinational channels.

6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: apparatus, having a pulsed transmitter of an antenna switch, a high frequency amplifier antenna, a mixer and an intermediate frequency amplifier, also includes a directional coupler, a frequency divider, a phase synchroniser and a frequency synthesiser, wherein the second output o the pulsed transmitter is connected through the coupler, through the frequency divider to the first input of the frequency synthesiser, having a second input connected through the phase synchroniser to the output of said frequency divider and having an output connected to the second input of the mixer.

EFFECT: enabling output of a coherent signal.

FIELD: radio engineering, communication.

SUBSTANCE: apparatus includes a synchroniser, a transmitter, a receiver, an interval counter, a coincidence element unit, an azimuth sensor, an indicator and a secondary processing unit, and additionally a code comparing element, a flip-flop, a second coincidence element unit, read-only memory, a mooring area coordinate sensor, a heading and distance to mooring area transmitter, a radar emission receiver, a heading and distance to mooring area receiver, a heading and distance to mooring area indicator, a response signal transmitter and a response signal receiver.

EFFECT: safer mooring.

FIELD: radio engineering, communication.

SUBSTANCE: invention describes a system (11) for assisting a vehicle (10) driver, having a control device (12) which interacts with multiple sensors (14) mounted on the vehicle (10) via data communication over a data bus (15). According to the invention, a signal (23) from a sensor for generating an echo signal (19, 21, 22) is transmitted such that a known logic address of one of the sensors (14) is matched with a predefined position.

EFFECT: easy implementation and fewer wiring errors.

10 cl, 7 dwg

FIELD: radio engineering, communication.

SUBSTANCE: receiving hydroacoustic antenna consists of a computer unit and hydroacoustic receivers rigidly mounted on a chassis, wherein a wideband mechanical vibrator is mounted on said chassis and vibrations thereof are transmitted to the chassis during diagnosis, and said vibrator is controlled by commands from the computer unit. Mechanical vibrations of the antenna chassis caused by the vibrator at points where hydroacoustic receivers are mounted are defined and known in advance. During operation of the vibrator, the computer unit measures output signals of hydroacoustic receivers, based on which operating capacity thereof is determined and amplitude-frequency characteristics are determined. This allows rapid inspection of operating capacity of hydroacoustic receivers and measurement of amplitude-frequency characteristics thereof in order to derive adjustment factors.

EFFECT: enabling rapid inspection of operating capacity of sensitive antenna elements and plotting of amplitude-frequency characteristics of hydroacoustic receivers.

2 cl, 1 dwg

Antenna module // 2496119

FIELD: radio engineering, communication.

SUBSTANCE: antenna module consists of acoustic shields and hydroacoustic receivers, each having multiple cylindrical piezoceramic converters. The cylindrical converters form a continuous surface and completely cover the hydroacoustic shields in the direction of the normal to their surface. Converters included in a hydroacoustic receiver are strictly connected in series.

EFFECT: low power of a hydroacoustic wave reflected by the antenna and high sensitivity of hydroacoustic sensors.

2 cl, 1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: module has a multilayer printed-circuit board with N conducting layers and plated holes, through which interlayer electrical connections are made, which carries high-frequency and low-frequency connectors, as well as conductor strips and radio components which are grouped into analogue and digital signal processing zones. The screening plane of the analogue signal processing zone is located in the n-th conducting layer. The screening plane of the digital signal processing zone is located in the neighbouring (n+1)-th conducting layer. The earthing plane of the digital signal processing zone is connected through a plated hole, which forms the earth potential input line into the analogue signal processing zone from the digital signal processing zone, with the earth potential input section, located in the first conducting layer, into the analogue signal processing zone which is connected to the surrounding earthing section at one point by a zero resistance resistor. Said plated hole crosses the screening plane and the earthing sections of the digital signal processing zone to provide electrical contact with them, and the screening plane and crosses the earthing sections of the analogue signal processing zone without electrical contact with them.

EFFECT: designing a new version of the module, which widens the existing range of modules that are characterised by arranging the analogue and digital signal processing zones on below the other on different sides of a multilayer printed-circuit board and mutual screening by on-board means.

13 dwg

FIELD: instrument making.

SUBSTANCE: in the method to generate a control signal in a tracking system based on serial cyclic measurement of a displacement angle (DA) between a direction to an object and a sighting line of a controlled device, and correction of an error signal on the basis of forecast with account of a delay in a control circuit, the specified control signals on the first and second measurement cycles are generated based on the current DA measurement; from the second cycle of measurement the DA is forecasted for the time of measurement cycle by versions of hypotheses for forecasting: curves of the first and second order using, when measuring their coefficients, from 2 to N last measured and memorised DA (N≤Nmax); from the third cycle on the current cycle of measurements from versions of hypotheses, for which forecasting was made at the previous cycle, the one is selected, which provides for minimum error between the hypothesis forecasting and current measurement of DA; for a curve of an appropriate order by appropriate quantity of used DA measurements, including the current one, curve coefficients are determined for extrapolation of an error signal; it is extrapolated in accordance with it for the time of delay in a control circuit, and the corrected DA value is sent to generate a control signal.

EFFECT: higher accuracy of tracking over an object under a wide range of input error signal speed variation.

1 dwg

FIELD: physics.

SUBSTANCE: in the method of generating composite phase-shift keyed signals for a ship radar station, each signal segment includes a pulse signal strobe in the middle of the signal segment, and the duration of the pulsed signal strobe is equal to the maximum delay of the signal reflected from a far away object for which the scale of the radar station is intended. The non-periodic composite signal is presented in form of time-concentrated packets whose recurrence interval is equal to the maximum delay to the target, and the time-concentrated packets are arranged such that signals reflected from near and far targets do not cross in time. In the ship radar station using composite phase-shift keyed signals, the signal generating and processing device is part of an antenna post and lies not more than 1 m from the radio transmitter. The signal generating and processing device is based on a programmable logic device (PLD). The PLD is connected to a processor for processing and computing navigation data based on signals received by the PLD from the reflected signal receiver in form of amplitude and phase codes; and signals from angle sensors and transmission of the processed digital data over an Ethernet to the radio transmitter of the radar station.

EFFECT: reduced loss in the transceiver channel.

5 cl, 4 dwg

FIELD: physics.

SUBSTANCE: invention relates to communication engineering and can be used by systems for acquiring information on a subject receiving elastic waves. An ultrasonic imaging device includes a probe (302), having a plurality of elements (301) arranged in a matrix, and converts received elastic waves into received signals; the device includes a first signal processing unit in which received signals are used to compute first output signals corresponding to elastic waves from a target location, a second signal processing unit in which first output signals for a target location are used to compute second output signals corresponding to elastic waves from the target location, and an image processing unit in which the second output signals are used to generate image data for display on an image reproducing device. One of the first signal processing unit and the second signal processing unit employs adaptive signal processing to compute first output signals or second output signals.

EFFECT: high accuracy of receiving information owing to high spatial resolution.

9 cl, 11 dwg

FIELD: radio engineering, communication.

SUBSTANCE: cylindrical receiving antenna of a circular scanning hydroacoustic station comprises receiving elements mounted on an extensible structure configured to unfold the antenna from a transportation position to a working position and back, arranged on a circle to form a cylindrical receiving array. The antenna structure in the working position is sound transparent; elements of the cylindrical receiving array are arranged on one circle and their number is determined by the expression Nopt=[1+N0d0/dopt], where Nopt is the number of elements of the cylindrical receiving array; N0 is the number of elements spread on the circle of the antenna by distance d0=c/2fmax; where c is the speed of sound in water; fmax is the upper operating frequency; dopt is the distance calculated using an iteration procedure, when each iteration step includes calculating the beam pattern of the compensated circle at frequency fmax for N0 elements.

EFFECT: simple antenna design and reduced weight and size thereof, significantly reducing the number of antenna receivers while maintaining the concentration factor thereof.

11 dwg

FIELD: physics.

SUBSTANCE: this receiver comprises sealed spherical case filled partially with fluid to the level corresponding to zero case buoyancy in working fluid. Two piezoelectric elements of hydrophone channel built around sealed polarised-in-opposition piezoelectric film inverters are secured outside said spherical case opposite each other. Two pairs of bimorphs incorporated with components (x, y) of vector channel and two pairs of bimorphs vector channel component (z) are built around sealed piezoelectric film inverters. Sensitivity axes of the latter make the orthogonal system of coordinates with origin aligned with the spherical case centre. All bimorphs of three-component vector channel are arranged outside said spherical case. Inner ends of every of the fourth pairs of resilient substrates are arranged at spherical case outer surface to allow bending oscillations of resilient substrate. Outer ends of every of the fourth pairs of resilient substrates are rigidly secured at outer sealed ring case with amplifiers fitted therein. Said ring case is arranged outside said spherical case while hydrophone channel amplifier input and inputs of amplifiers of said three vector channels are a differential design.

EFFECT: higher sensitivity of piezoelectric components, decreased noises, lower sensitivity of combined hydro acoustic receiver.

4 dwg

FIELD: radio engineering, communication.

SUBSTANCE: bottom cable antenna for monitoring offshore seismoacoustic emission, comprising an underwater cable, hydrophone modules connected by the underwater cable through defined distances between each other, surface collection and conversion equipment connected to one end of the underwater cable, is provided with an anchor which is tied to the opposite end of the underwater cable, additional loads tied to the underwater cable between corresponding hydrophone modules and floating suspensions tied to the underwater cable to corresponding hydrophone modules, wherein the hydrophone modules are in the form of pressure inlets. Use of pressure inlets instead of two hydroacoustic antennae significantly reduces the cost of the bottom antenna and simultaneously solves problems associated with the quality of contact between the sensor and the ground by eliminating noise which accompanies said contact. Use of a large number of said sensors solves the problem of picking up waves of different polarisation based on kinematic characteristics thereof.

EFFECT: high noise-immunity by preventing dragging of the antenna on the ground.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: acoustic receivers are mounted on the outer surface of sound transparent envelopes made of elastic material, wherein the shape of the envelopes is provided by filling the inner volume with liquid under pressure, wave impedance of which is slightly different from the wave impedance of the working medium. The frame of the antenna used is a sound transparent envelope made of elastic composite material, the shape of which is provided by filling the inner volume of the envelope with working fluid. Water-impermeable envelopes for water-filled frames can be made based on modern materials. A water-filled antenna comprises receiving units in the form of extended sections which hold acoustic receivers with small wave dimensions, pre-amplifiers and electrical (optical) links. The receiving units are sealed with a polymer material and are mounted on the outer surface of the antenna by ropes. Uncased large-size antenna arrays form a rigid geometrical shape by filling the inner volume with working fluid under excess pressure. The excess pressure is generated by a hydraulic pump.

EFFECT: higher efficiency of hydroacoustic stations, high efficiency of the antenna, particularly a large aspect angle and concentration factor in a wide frequency band, low sonar visibility, material consumption, weight and cost.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: in the proposed method there set are location coordinates and movement parameters of a carrier of a receiving-transmitting radio-technical system, considering an antenna directivity pattern (DP); boundaries of an area of radio emission interaction with a section of an underlying surface presented with a set of resolution elements are determined; an image of ground surface are pre-shaped in gradations of gray colour at intervals corresponding to image change frequency determined by a mapping mode, as well as signals determining navigation parameters and control signals shaped by the specified mapping mode, including antenna DP width as to azimuth and angle of a place, number of (strobes) of range channels, position of an antenna beam as to azimuth and angle of the place, duration of a sounding pulse, period of its repetition and type of modulation; depending on the obtained parameters, separation of the ground surface image is performed for each beam position into resolution elements as to range, which are characterised by a value of reflected signal amplitude determined based on averaged colour of the original image area corresponding to this resolution element; modulation of a pre-shaped harmonic signal is performed by amplitude of reflected signal from each resolution element; its phase modulation is performed with thirteen-digit Barker code, and based on the received signal, shaping of its in-phase and quadrature-phase components and its conversion to intermediate frequency and digital-to-analogue conversion is performed; then, sequence of actions is repeated for each beam position within a zone of vision.

EFFECT: improving accuracy and reducing time for simulation of a signal reflected from ground surface.

1 dwg

FIELD: physics, acoustics.

SUBSTANCE: invention relates to acoustic engineering and can be used in medical equipment for ultrasound scanning. The ultrasonic device comprises: a module having an input part and an output part; an ultrasonic transducer comprising a microbeam former configured for connection and disconnection from the input part of the module; and a display connected to the output part of the module. An ultrasonic system is also described.

EFFECT: widening the viewing angle of movements through ultrasonic images.

23 cl, 3 dwg

FIELD: measurement equipment.

SUBSTANCE: ultrasonic diagnostic system for generation of images creates an image with an extended field of vision (EFOV). A three-dimensional probe for generating an image moves along a patient's skin above anatomy that shall be introduced to an image with EFOV. As the probe moves, images are obtained from many differently oriented image planes, such as a sagittal plane and a transversal plane. As the probe moves, the image data of planes following one after another with one of orientations is compared to assess the probe movement. These assessments are used to arrange sequence of images generated in one of the orientations accurately relative to each other in the format of an image with EFOV. Movement assessments are also used to display graphics on the display screen, which shows to a user a scanning process as the probe moves.

EFFECT: progress can be indicated by probe speed measurement units, passed distance or the way passed by the moving probe.

15 cl, 12 dwg

FIELD: physics, acoustics.

SUBSTANCE: invention relates to hydroacoustics and can be used in seas, oceans and freshwater bodies as a geophysical rope engineering studies at the sea bottom. The hydroacoustic trailing antenna for geophysical work has an external elastic cable sheath inside of which there are receivers which consist of two identical sensitive piezoelectric elements made from an electrically polarised piezoelectric film with electrodes deposited on and strongly bound to its surface, sealed housings fitted with electronic boards with differential amplifiers and analogue-to-digital converters, a digital communication line and a power supply line. Inputs of the differential amplifiers are anti-phase connected to the sensitive piezoelectric elements and outputs are connected to analogue-to-digital converters, outputs of which are connected to the digital communication line. The sealed housings are in form of thin-walled cylinders made of hard plastic, the inner surface of which is respectively fitted with sensitive film-type piezoelectric elements by sides with opposite electric polarisation, wherein the film is stretched in a circular direction, and ends of the cylindrical housings are closed by covers, on the inner surfaces of which there are annular grooves in which seal rings are inserted. Rigid supporting members are placed between the covers inside the sealed housings. The film-type piezoelectric elements are in form of two semicylindrical casings mounted with spacing to the inner surface of the housings with opposite polarisation on their entire length, and the bearing member is in form of mesh braids which are mounted as a reinforcing element in the elastic outer cable sheath.

EFFECT: high sensitivity and reduced dependency on the immersion depth, as well as small diameter of the antenna.

2 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to ultrasound diagnostic systems of image formation. Device contains probe, made with possibility of transmitting ultrasound waves in heart and receiving response echo-signals, image processor, reacting on echo-signals, made with possibility of producing succession of myocardium images within, at least, part of cardiac cycle, analyser of myocardium movement, reacting on succession of images, which determines movement of multitude of myocardium segments, processor of engagement, reacting on movement of segments, produced by indicator of collective participation of multitude of segments as percentage of complete displacement of myocardium during cardiac cycle and relative intervals of time of participation of segments in myocardium movement relative to percentage of complete displacement during cardiac cycle, and display, connected with processor of engagement, which reflects indicator.

EFFECT: application of invention makes it possible to increase efficiency and accuracy of identification of loss of synchronicity in myocardium movement.

15 cl, 8 dwg

FIELD: medicine.

SUBSTANCE: technique involves foetus's middle cerebral artery Doppler ultrasonography prior to and after a pregnant woman holds her breath as much as possible at a depth of inhale. Diagnostically significant indices of blood velocity curves resistance in the foetus's middle cerebral artery that are a systolic/diastolic ratio, a resistance, a pulsation index are measured with a breath-holding test conducted and taking into account foetus's daily rhythmostasis. If the Doppler ultrasound measures are: the systolic/diastolic ratio at 12.00 prior to breath-holding 3.71±0.05, after breath-holding 4.56±0.08 and at 20.00 prior to breath-holding 3.92±0.06, after breath-holding 4.74±0.09; the resistance at 12.00 prior to breath-holding 0.69±0.03, after breath-holding 0.87±0.04 and at 20.00 prior to breath-holding 0.80±0.03, after breath-holding 0.91±0.04; the pulsation index at 12.00 prior to breath-holding 1.78±0.04, after breath-holding 1.92±0.03 and at 20.00 prior to breath-holding 1.84±0.04, after breath-holding 1.97±0.04, changes in the foetus's functional status are detected and chronic foetal hypoxia is diagnosed.

EFFECT: technique enables increasing the diagnostic accuracy in chronic foetal hypoxia by measuring the functional parameters taking into account the time variations of daily rhythmostasis.

1 ex

Up!