77 results about "Source orientation" patented technology

Systems and methods are provided for source localization and separation by sampling a large scale microphone array asynchronously to simulate a smaller size but moving microphone array. Signals that arrive from different angles at the array are shifted differently in their frequency content. The sources are separated by evaluating correlated and even equal frequency content. Compressive sampling enables the utilization of extremely large scale microphone arrays by reducing the computational effort orders of magnitude in comparison to standard synchronous sampling approaches. Processor based systems to perform the source separation methods are also provided.

Methods, systems and computer readable media for reconstruction of target locations and amplitudes from signals received from one or more real targets in a space are provided, wherein the signals are at least one of signals received from the near-field and broadband signals. The space is modeled as a region of interest, and an array manifold matrix is calculated from signals received from hypothetical targets in the region of interest. One or more signal vectors received from the one or more real targets are reshaped into a data vector. A hypothetical target configuration is identified that, when applied to a signal model comprising the array manifold matrix, matches the data vector, a reconstruction vector is calculated. The reconstruction vector is reshaped into a reconstructed representation of the real targets in the space, and at least one of outputting the reconstructed representation for viewing by a user, and storing the reconstructed representation for later use are performed.

A vehicle control device includes a motive power source orientation control device, a friction brake orientation control device, a damping force control device, and an orientation control device. The orientation control device controls vehicle body orientation via the motive power source orientation control device when the absolute value of the amplitude of a detected state quantity is less than a first predetermined value, via the damping force control device in addition to the motive power source orientation control device when the absolute value of the amplitude is equal to or greater than the first predetermined value and less than a second predetermined value greater than the first predetermined value, and via the friction brake orientation control device in addition to the motive power source orientation control device and the damping force control device when the absolute value of the amplitude is equal to or greater than the second predetermined value.

A microphone assembly using a plurality of unidirectional microphone elements is proposed. Mount this microphone assembly overhead, usually above all desired sources and below undesired sources. Signals from the plurality of microphone elements are provided to a microphone operations processor which can mix and gate the signals to ensure an optimal signal / noise ratio. The operational processor can also dynamically track audio sources when such tracking (source localization) is required. The resulting audio signal from the operational processor may be further processed, such as echo cancellation, noise reduction and automatic gain control.

A system and method for determining a probability of the location of an illicit radiation source within an environment based on directional detectors. An embodiment includes a plurality of directional radiation detectors distributed about the environment and integrated with a processing unit adapted to determine the probability of the source location based on the radiation count data received from the plurality of detectors. The processing unit is further adapted to output information indicative of the location of the radiation source within the environment.

The invention provides a sound source positioning method and apparatus. A plurality of independent sound sensors with identical characteristics are arranged on a ball machine in advance; and any two sound sensors are separated at a preset interval, wherein the preset interval is smaller than the diameter of the ball machine; and the orientations of sound sensors are identical. The method comprises: multiple sound sensors are used for collecting sound time-domain data from a same sound source; the sound time-domain data collected by each sound sensor are converted into sound frequency-domain data; according to the sound frequency-domain data corresponding to the sound sensor, a high frequency ratio value corresponding to the sound sensor is calculated; and according to the high frequency ratio values corresponding to all sound sensors, a direction of the sound source is determined, wherein the direction of the sound source is the orientation of the sound sensor or a direction opposite to the sound sensor. Therefore, a sound source can be localized by a ball machine in a 360-degree range; and the sound source positioning accuracy is improved.

The invention belongs to the mobile communication technological field and discloses an array antenna-based target signal source detection method. The method includes the following steps that: the number and orientations of target signal sources are judged preliminarily though a beamforming technology, and an antenna coverage area is divided into a plurality of cells according to received signal power obtained in a beam rotation process; a beam is made to sequentially direct to the plurality of cells, and the spatial spectrum of signals in each of the cells is obtained through an MUSIC algorithm, and the number and orientations of target signal sources in each of the cells are determined; and the calculation results of the plurality of cells are summarized, and the exact number and preciseorientations of the target signal sources are obtained after comprehensive processing is carried out. With the array antenna-based target signal source detection method of the invention adopted, the problems of low spatial resolution and many limitations in application of target signal source orientation estimation in the prior art can be solved; and spatial resolution can be improved, and the number of signal sources that can be detected is not affected by the number of array antenna array elements.

Methods, systems and computer readable media for reconstruction of target locations and amplitudes from signals received from one or more real targets in a space are provided, wherein the signals are at least one of signals received from the near-field and broadband signals. The space is modeled as a region of interest, and an array manifold matrix is calculated from signals received from hypothetical targets in the region of interest. One or more signal vectors received from the one or more real targets are reshaped into a data vector. A hypothetical target configuration is identified that, when applied to a signal model comprising the array manifold matrix, matches the data vector, a reconstruction vector is calculated. The reconstruction vector is reshaped into a reconstructed representation of the real targets in the space, and at least one of outputting the reconstructed representation for viewing by a user, and storing the reconstructed representation for later use are performed.

A new approach is described based on reciprocity for estimating acquisition-related effects, which has several advantages over conventional surface-consistent processing techniques: (i) It can be applied to complete recordings, hence does not require the isolation of primary reflections in the data, (ii) no assumptions are imposed on the subsurface, and (iii) it is applicable to multi-component data. The application of reciprocity requires symmetric data acquisition, i.e. identical source and receiver patterns, identical locations, and the source orientations have to be identical to the receiver components. Besides reciprocity, additional constraints are required to determine the lateral source and receiver amplitude variations fully. Criteria based on minimizing total energy differences between adjacent common source and common receiver gathers, and in common offset panels of the medium response are applied.

A new approach is described based on reciprocity for estimating acquisition-related effects, which has several advantages over conventional surface-consistent processing techniques: (i) It can be applied to complete recordings, hence does not require the isolation of primary reflections in the data, (ii) no assumptions are imposed on the subsurface, and (iii) it is applicable to multi-component data. The application of reciprocity requires symmetric data acquisition, i.e. identical source and receiver patterns, identical locations, and the source orientations have to be identical to the receiver components. Besides reciprocity, additional constraints are required to determine the lateral source and receiver amplitude variations fully. Criteria based on minimizing total energy differences between adjacent common source and common receiver gathers, and in common offset panels of the medium response are applied.

System for reducing NOx emissions from burners of furnaces such as those used in steam cracking. The system includes a furnace having at least one burner, the at least one burner including a primary air chamber; a burner tube including a downstream end, an upstream end in fluid communication with the primary air chamber for receiving air, flue gas or mixtures thereof and fuel, a venturi portion positioned between the downstream end and the upstream end, and a burner tip mounted on the downstream end of the burner tube adjacent the first opening in the furnace for combusting the fuel downstream of the burner tip; and a fuel orifice located adjacent the upstream end of the burner tube for introducing fuel into the burner tube; a source of flue gas, said source positioned so as to enable the flue gas to achieve a temperature of less than 2000° F. at least one passageway for conducting flue gas from the source to the primary air chamber; and inspirating means, the inspirating means including the venturi portion effective for drawing flue gas from the source, through the at least one passageway and the primary air chamber in response to an inspirating effect of uncombusted fuel exiting the fuel orifice, the uncombusted fuel flowing through the burner tube from its upstream end towards its downstream end, whereby the flue gas is mixed with air at the upstream end of the burner tube prior to the zone of combustion of the fuel.

The invention discloses a high voltage electroscope based on an electro-optical effect. The high voltage electroscope comprises an electric field intensity sensing module, a signal transformation and pretreatment module, a data acquisition module, a data processing module, an alarm module, a power supply module and an L-GPS (Global Positioning System) positioning module. The high voltage electroscope based on the electro-optic effect has the advantages of calculating the high voltage power line source orientation of the sensor module, pointing out which conductors are live, and giving high voltage electrified alarm by detecting the electric field intensity of each point on reference relevant path of relevance zero point and high voltage detection points positioned by the L-GPS module at high precision; if the vector of each point is superimposed, calculating the voltage of a target live conductor relative to the reference zero to give the high voltage electrified level of the target conductor; detecting whether the conductor has alternating or direct current high voltage, high voltage target conductor orientation and the like, and having less interference and relative safety.

The invention discloses a method for locating a grid fault source through power quality monitoring data and an electric system. The problems that in the prior art, fault source locating is high in cost and large in investment are solved. The fault monitoring time difference of power quality monitoring nodes at the two ends of a fault circuit is calculated so as to locate the fault source. No more investment is needed, fault source locating can be achieved only through an existing power quality monitoring device in the power grid, and cost is low.

A device for administering brachytherapy to a patient includes a vessel that may be in the form of a hollow cylindrical cup, for fleshing into and substantially filling the open-ended cavity. The vessel has a closed outer end, which may be a removable cover, and a source guide penetrates the closed outer end so as to extend deep into the vessel, to receive a radiation source in the source guide. A manipulator can be connected to the radiation source, and also to the source guide, for allowing several different types of manipulation of the source orientation and position within the vessel during the brachytherapy procedure.

The present invention relates to a method, instruction set and system for speech control of movement of a service robot. The method, instruction set and system for speech control of movement of a service robot are applied on a ground movement service robot body, when a person and the robot perform interaction through speech, a microphone array on a robot body captures audio signals of a speaker and analyzes the audio source orientation of the speaker, the audio signals are identified to text through a speech recognition system on the robot body, the confirmed command work text of movement control of the robot is compared with the robot movement control instruction set, and once the confirmed command work text of movement control of the robot is matched with the robot movement control instruction set, a corresponding movement control instruction is started to control the movement of the robot, and the speech control of the movement of the robot is restrained by the obstacle avoidance function of the service robot. The system comprises a microphone array, a speech identification system, an instruction set, a service robot chassis movement function base and a supersonic wave obstacle avoidance and inertial navigation system. The system provided by the invention and the service robot chassis movement control system perform communication and connection through the call mode of the service robot chassis movement function base to realize final movement control motion.

The invention relates to the field of pollination of crops, in particular to an effective method for increasing the flower visiting rate of bees. The flower visiting frequency and the number of flowers visited by the bees are increased by combining bee colony control and spraying of an attractant on plants. The method comprises steps as follows: a hybrid soybean field adopting bee pollination is selected; the structure of a bee colony is adjusted; the bee colony for pollination is transported to the soybean field, and the selected bee colony for pollination is transported to the hybrid soybean seed production field in the early stage of flowering of the soybeans; the attractant to be sprayed to the plants is prepared from linalool, benzyl alcohol, ocimene, geraniol, nerol, mushroom alcohol and 2-heptanone. The bee colony is released in the pollination field after being prepared, and the attractant is sprayed on flowers of crops in the flowering period of the crops to attract the bees to visit the flowers. The biological characteristic that pollen and smell are taken as one of approaches to food-source orientation of bee larva is utilized, a large quantity of bees are attracted, the number of the flowers visited by the bees and the natural pollination rate are increased, the yield of the crops is increased, and the method has the characteristics that the method is scientific, simple, convenient and easy to operate, low in cost and remarkable in effect and materials are low in price and easy to obtain.

The invention relates to the field of engineering site earthquake effect evaluation, in particular to an engineering site earthquake hazard analysis method considering the effect of potential earthquake source orientations, which comprises the following steps: step 1, defining an engineering site earthquake affected zone; step 2, defining a potential earthquake source; step 3, establishing a site earthquake effect analysis framework; step 4, establishing an earthquake annual incidence rate matrix; step 5, establishing an earthquake effect intensity matrix; step 6, determining the exceeding rate of earthquake effect intensity in different orientations; step 7, calculating the exceeding probability of the earthquake effect intensity in the different orientations. The engineering site earthquake hazard analysis method has the benefits that the effect of the potential earthquake source orientations on an engineering site earthquake is fully considered, the deviation between an earthquake hazard analysis result and an actual earthquake effect is reduced, and the requirement of engineering anti-earthquake for the analysis of an earthquake damage way is met.

A fractal analysis method for flicker source orientation belongs to the testing technical field and is used for solving flicker source orientation problem. The technical scheme includes: firstly voltage and current data of each load is acquired in certain sampling frequency, then root mean square values of voltage and current in each power frequency period are calculated, and then fractal dimensions of the obtained root mean square values of voltage and current are calculated respectively, and finally the fractal dimension of the obtained root mean square value of voltage and the fractal dimension of the obtained root mean square value of current are compared with respective thresholds to judge whether a flicker source is existed in each branch. The invention takes whether the fractal dimensions of the root mean square value of voltage and the root mean square value of current are more than respective thresholds as criterion, and can conveniently, quickly and accurately find the flicker source producing voltage fluctuation in a power system only by acquiring voltage and current data of each load, thus causing flicking hazard to be effectively treated and having great practical value.

A system or method can facilitate source localization of brain electrical activity. In one example, an expert system can be utilized to evaluate the source localization results and, based on the acceptability of the results, adjust a data preparation phase to provide for acceptable source localization.

Disclosed is a method and system for diffraction-aware non-line of sight (NLOS) sound source localization (SSL) that may reconstruct an indoor space, may generate acoustic rays into the indoor space based on an audio signal collected from the indoor space, and may estimate a position of an NLOS sound source based on a point at which one of the acoustic rays is diffracted.

The invention relates to the technical field of communication, in particular to a sound source positioning method and device, and the method comprises the steps: determining the time difference between the first receiving time when a sound source is collected through a first microphone and the second receiving time when the sound source is collected through a second microphone; determining reference position information of the sound source according to the time difference and a preset distance between a first microphone and a second microphone; determining an intensity difference between a first sound intensity of the sound source acquired by the first microphone and a second sound intensity of the sound source acquired by the second microphone; and determining target position informationof the sound source from the reference position information according to the intensity difference, the reference position information and a preset association relationship between the intensity difference and the position information, so the accuracy of sound source positioning can be improved.

The embodiment of the invention discloses a multi-beam beam forming method and device, and an electronic device, thereby realizing multi-beam beam forming, ensuring high fidelity of the sound of a target space orientation, and effectively suppressing sounds of other space orientations. The multi-beam beam forming method comprises: products of a spatial filtering parameter and original frequency domain signals corresponding to at least two sound source orientations respectively are calculated to obtain multi-beam beam forming, wherein the spatial filtering parameter varies with varying of angles and sub band frequencies of the sound sources and the at least two sound source orientations includes a target source orientation and at least one another sound source orientation; an enhanced voiceof the target sound source orientation is calculated; an energy ratio value is calculated according to the sub band energy corresponding to the target source orientation and the energy sum of all subbands of the at least one another sound source orientation; and a product of the original frequency domain signal of the target source orientation, the enhanced voice corresponding to the target source orientation, and the energy ratio value is calculated and a voice corresponding to the product is outputted.

The invention discloses an intelligent radiation source searching and disposing robot. An intelligent radiation source searching and disposing robot comprises a carrier capable of moving; the carrier is provided with a radiation source orientation detection probe for detecting a radiation source; and the radiation source orientation detection probe comprises a radiation shielding device, a detection collimating window and a detection mechanism. Through configuration of a radiation monitoring and emergency disposing robot, the intelligent radiation source searching and disposing robot improves the radiation monitoring and accident emergency processing capability, and is a strong guarantee for continuous development of the radiation source and nuclear power industry. In the long time run, the development of the emergency disposing robot and the monitoring system not only brings enormous social benefit, boosts development of related industries, relates to the long-run safe development of the nuclear energy industry and has a certain meaning to the economic continuous development.

The invention provides a coherent distributed wideband chirp information source orientation method. The method comprises the steps of establishing distributed wideband information source models in a time domain and a fractional order domain; obtaining multiple spectrum peak values based on the energy aggregation property of a chirp signal through two-dimensional searching on a time-frequency plane; determining the number of distributed information sources by calculating the number of spectrum peaks; conducing filtering on each distributed information source in the corresponding energy aggregation domain, and conducting spectrum peak searching according to the dechirp property of the distributed information source with the classic distributed narrow-band information source space parameter estimation (DSPE) algorithm so as to determine spatial parameters and achieve information source orientation. Compared with traditional coherent signal-subspace methods, the coherent distributed wideband chirp information source orientation method has the advantages that centric angle estimation accuracy is higher, and orientation of a distributed information source with the number of incidence information sources larger than that of array elements can be achieved.

The invention relates to a light field source orientation method for augmented and virtual reality and front-end equipment. The method comprises the steps of: A, recognizing a target mark; B, tracking the target mark; C, analyzing a pixel color disk on certain object; D, analyzing a grey zone on the object; E, pushing data to a light field of a virtual object; and F, compensating and adjusting the image of the virtual object. Surrounding environment factors such as light source direction can be searched, so that the computer-synthesized object projection to the real environment has a shadow consistent with the reality, the augmented reality environment is more real, and the real effect of the object is restored.

The invention provides a method and a system for infrasonic source orientation and speed control. The method comprises a step 101) of using a statistic analysis method, solving a effective delay range through a normal distribution model, that is, getting rid of all outliers in all delay values according to a mean value of a delay sum, so as to select an effective delay value; and a step 102) of based on the effective delay value, performing orientation and speed control processes on a infrasonic source by using a delay algorithm, to obtain orientation and speed control processing results of a to-be-tested infrasonic source by each sub-monitoring network. The method also comprises a step 103) of eliminating interference infrasonic sources based on the orientation processing results obtained by the sub-monitoring networks through a statistic comprehensive method, so as to complete optimized orientation on the to-be-tested target infrasonic source. The method is simple and reliable, and does not have harsh requirements on infrasonic monitoring formation and monitoring time, and meanwhile self noise of sensors and digital instruments can be eliminated, and interference generated by other infrasonic sources around the sub-networks can be eliminated.

A device for administering brachytherapy to a patient includes a vessel that may be in the form of a hollow cylindrical cup, for fleshing into and substantially filling the open-ended cavity. The vessel has a closed outer end, which may be a removable cover, and a source guide penetrates the closed outer end so as to extend deep into the vessel, to receive a radiation source in the source guide. A manipulator can be connected to the radiation source, and also to the source guide, for allowing several different types of manipulation of the source orientation and position within the vessel during the brachytherapy procedure.

The invention discloses a mine seism advance detection method based on a carbon dioxide cannon, which comprises the following steps: the carbon dioxide cannon is used as a seismic source of mine seismadvance detection; facing a worker, a drill hole is punched in the head-on middle of a tunnel and the carbon dioxide cannon is placed at a predetermined position and oriented installation is carriedout on the carbon dioxide cannon; a plurality of six-component detectors are arranged in turn and side by side on a side wall of the tunnel; a collecting host is turned on, and the carbon dioxide cannon emits vibration signals to the pre-digging direction at a time, at the moment, the six-component detectors send detected vibration signals to the collecting host and the collecting host records; and the collecting host transmits each collected vibration signal to a computer, and the computer carries out comprehensive analysis in combination with geological data on site and finally predicts thegeologic anomaly structure in the front of the tunnel. The method disclosed in the invention has the advantages of low pressure detonation, seism source orientation, controllable energy and repeated using, and can carry out mine seism advance detection in the process of coal mass fracture operation carried out by the carbon dioxide cannon, so as to realize the mine seism advance detection withoutaffecting construction on a working face.