55 results about "Spherical array" patented technology

The invention relates to the field of sound velocity, opto-acoustic and ultrasonic imaging, in particular to a dynamic sound velocity self-adaptive ultrasonic opto-acoustic bimodal imaging method and a dynamic sound velocity self-adaptive ultrasonic opto-acoustic bimodal imaging system. The method comprises the following steps: acquiring an ultrasonic signal and a photoacoustic signal; reconstructing a sound velocity distribution diagram according to the ultrasonic signal; based on the sound velocity distribution diagram, reconstructing a related time delay diagram; and reconstructing an ultrasonic image and a photoacoustic image based on the related time delay graph. The problems that a traditional sound velocity correction method is limited in application range, inconvenient to operate, high in cost, low in resolution and the like are solved; the adopted sound velocity correction algorithm is high in resolution, is suitable for various transducers of linear arrays, convex arrays, ring arrays, spherical arrays and the like, and is widely applied to most parts of a human body; cancerous tissues, normal tissues, muscles, fat and the like can be accurately distinguished; the ultrasonic and photoacoustic dual-mode imaging system is simple in structure, is not influenced by illumination, is high in sound velocity resolution and signal-to-noise ratio, supports seamless correction and registration of ultrasonic and photoacoustic dual-mode imaging, and promotes clinical application and development of ultrasonic and photoacoustic dual-mode imaging.

The invention provides an acoustic event positioning method, device and system and a computer readable storage medium, is applied to an acoustic event positioning system, and relates to the technical field of acoustic positioning. The method comprises the following steps: acquiring multi-modal fusion data by a high-order surround acoustic spherical array node; the high-order surround acoustic spherical array node compresses the multi-modal fusion data and then sends the multi-modal fusion data to the data processing subsystem; the data processing subsystem performs feature extraction and recognition on the multi-modal fusion data based on a pre-trained multi-source data fusion positioning model, and outputs the type of an acoustic event and the coordinate of the acoustic event; wherein the multi-source data fusion positioning model comprises a feature extraction module and a space-time fusion module; according to the method, accurate multi-modal fusion data is obtained, feature extraction and recognition are performed by using a positioning model with a feature extraction module and a space-time fusion module, the type and positioning of an acoustic event are accurately output, calculation is simplified, and the phenotype of the model in a complex environment is remarkably improved.

The invention discloses a virtual array plane forming method of a mathematical multi-beam spherical phased array antenna, which comprises the following steps of: controlling the geometric dimension of a sub-array so as to control the influence of aperture transit time of array elements in the sub-array within an effective range, that is, adopting a phase compensation method without considering the influence of aperture transit in the sub-array, beamforming in the sub-array is completed; beamforming of the spherical array antenna is completed among the sub-arrays in the activated area according to a time delay compensation method; wherein only phase compensation synthesis is carried out between array elements in the sub-array; and time delay compensation synthesis is carried out among the sub-arrays. According to the invention, the beamforming requirement of the digital beam spherical phased-array antenna on the broadband signal can be realized, and the realization method is simple.

The invention discloses a wide-angle scanning liquid crystal phased array design method and device and a storage medium, and relates to the technical field of antenna pulses. Array unit distribution density and curved surface curvature target parameters are calculated according to hemispherical array field angle extension constraint and a dual-band electromagnetic characteristic matrix; generating three-dimensional array model import parameters with different curvature radiuses to calculate array curvature radiuses, establishing a graphene metasurface parameter set and a liquid crystal layer parameter set, generating array models with different unit intervals, performing fitting calculation to obtain a unit interval set, and generating the array models by utilizing the unit interval set and curved surface curvature target parameters. Fitting and calculating a beam scanning range, obtaining a scanning range set, calculating the optimal arrangement mode and number of array units according to the scanning range set and the distribution density target parameters, and determining the installation point location of the multi-physics field regulation and control module to form an integrated structure. The method solves the problems that dual-band characteristics are difficult to consider during wide-angle scanning, parameter determination is inaccurate, and the integration level of multi-physics field regulation and control is low.

The invention discloses a spherical conformal array antenna fast beam forming method based on multi-surface splicing, which comprises the following steps: designing a circularly polarized antenna unit according to an actual demand, and extracting radiation information of the circularly polarized antenna unit; determining a specific form of a multi-surface spliced spherical conformal array according to an actual demand, and calculating array element position information; according to the center position of each plane of the spherical array, array element radiation information used by each plane of the multi-plane spliced spherical conformal array is calculated; determining different working array elements according to different beam directions; 5, calculating the compensation phase of the working array element according to different wave beam directions and the polarization condition of the array element; and performing beam forming according to the required scanning angle. According to the method, the problem that the beam pointing directions of array elements of the spherical conformal array are inconsistent is solved by utilizing a rotation matrix, and the problem that the polarization directions of the array elements of the spherical conformal array are inconsistent is solved by utilizing phase compensation. The method is of great significance to large-angle scanning and rapid beam forming of the spherical array.

The present invention relates to an optimized uniformly distributed spherical acoustic array generation method, which selects an odd number as the number of array elements of the target array; calculates the latitude coordinates of the i-th array element in the target array; calculates the longitude coordinates of the i-th array element in the target array; and calculates the preliminary values ​​of the longitude and latitude coordinates of all array elements in the target array; and adjusts the preliminary values ​​of the longitude and latitude coordinates of the array elements to form a spatially uniform spherical array based on the Fibonacci sequence. The purpose of the present invention is to avoid the shortcomings of the existing acoustic array technology, such as limited positioning accuracy, poor adaptability, high cost and complexity, and large computing resource requirements, and to provide a spherical acoustic array generation method based on the Fibonacci sequence. The method improves the accuracy of sound source positioning and the adaptability of the system by optimizing the array layout, while reducing the implementation cost and computational complexity, thereby providing a more efficient, reliable and economical acoustic solution.

The invention relates to a uniform spherical array time domain sound source localization method based on a neural network, and belongs to the technical field of sound source localization. The method comprises the following steps: constructing a uniform spherical microphone array, and arranging microphones on a spherical surface by adopting a golden angle distribution strategy; collecting a multi-channel time domain audio signal; a time domain signal is input to a deep regression neural network, the network comprises a time domain encoder, a Transform encoder and a full connection layer, and continuous coordinates of a sound source in a three-dimensional space are directly output. According to the method, frequency domain conversion and space grid division are avoided, the positioning precision, the calculation efficiency and the three-dimensional full-space applicability are improved, and the method is suitable for real-time sound source positioning in a complex acoustic environment.

The invention discloses a design method and a design device of a multi-point out-of-focus glasses lens. The design method is realized based on a curved surface substrate lens array splicing method, a spliced curved surface is formed by splicing a substrate curved surface and a sub-spherical surface array, after the vector height and the normal vector of the substrate curved surface at the sub-spherical surface position are determined, the expression of the sub-spherical surface is solved through the given curvature radius and aperture size, and the sub-spherical surface is obtained. And the vector height of the sampling point of the spliced curved surface is determined by comparing the local curvatures and vector heights of the substrate curved surface and the sub-spherical surface at any sampling point, so that the spliced curved surface with continuous functions and no sudden change at the boundary of the substrate curved surface and the sub-spherical surface is obtained, surface processing is facilitated, and the sub-spherical surface array can be arranged in a user-defined manner. And the curved surface parameters can be designed according to the required focal power of the substrate curved surface and the sub-spherical array. According to the design method, the curved surface description process is simple, the result is accurate, implementation is easy, and the obtained spliced curved surface is suitable for design and simulation analysis of multi-point out-of-focus glasses lenses.

The application provides an air conditioner production line abnormal sound detection method and system, comprising: acquiring sound signals in real time through a microphone spherical array; processing the sound signals based on an HOA-SHT domain analysis framework to generate a panorama sound image; acquiring an air conditioner image through a panorama camera; locking an air conditioner area according to the air conditioner image; performing multi-modal positioning on the air conditioner area through the panorama sound image to obtain a target area; extracting sound signals from the target area through a multi-scale mel spectrum, and inputting the extracted sound signals into a beamformer of a neural network to obtain noise signals; detecting and identifying the noise signals based on a convolutional neural network-based anomaly classifier to obtain air conditioner abnormal sound classification results; efficiently and accurately detecting air conditioner hanging machine abnormal sounds, effectively overcoming the limitations of traditional manual detection methods, significantly improving production efficiency, reducing the false detection rate and the missed detection rate, and providing strong quality guarantee for the production line.

This invention belongs to the field of spherical array layout design, and discloses a broadband high-gain spherical array layout method based on co-frame design, according to the upper limit f of the operating frequency of the closely packed spherical array. max Calculate the approximate element spacing d0 = (c / f max Step 2: Based on the array space, calculate the maximum diameter R, vertical height H, and vertical arc length L of the spherical array. H This invention addresses the problem of insufficient low-frequency gain caused by the limited installation space of spherical arrays. By using a design that combines a vector sparse spherical array with a scalar close-packed conformal array, it achieves high low-frequency gain, enabling it to have broadband high array gain with only a slight increase in the number of preprocessing channels, thus meeting the requirements for full-band detection.

This invention relates to the field of pressure testing technology and discloses an omnidirectional pressure measurement system and method. The omnidirectional pressure measurement system includes a spherical piezoelectric sensor array module, a signal conditioning module, a signal storage and transmission module, and a host computer. The spherical piezoelectric sensor array module collects pressure signals in space, processes them through the signal conditioning module, and transmits them to the host computer via the storage and transmission module. The host computer calculates the pressure field intensity and pressure source location at each point and reconstructs the pressure field using the data. This invention employs a spherical array design with a dodecahedral vertex topology, enabling the system to achieve multi-angle information acquisition and depth perception, eliminating detection blind spots. This invention constructs a weighting function in a spherical coordinate system, calculates the pressure intensity at each point in space using a weighted average, estimates the initial position of the pressure source by squaring the measured value, and combines iterative algorithms for precise positioning. This invention not only improves measurement accuracy and efficiency but also enables the reconstruction of dynamic pressure fields.

The application provides an acoustic event positioning method, device, system and computer readable storage medium, which is applied to an acoustic event positioning system and relates to the technical field of acoustic positioning. The method comprises the following steps: a high-order surround acoustic spherical array node acquires multi-modal fusion data; the high-order surround acoustic spherical array node sends the multi-modal fusion data to a data processing subsystem after compression processing; the data processing subsystem extracts and identifies features of the multi-modal fusion data based on a pre-trained multi-source data fusion positioning model, and outputs a type of acoustic event and coordinates of the acoustic event; wherein the multi-source data fusion positioning model comprises a feature extraction module and a space-time fusion module; accurate multi-modal fusion data is acquired, and the positioning model with the feature extraction module and the space-time fusion module is used for feature extraction and identification, so that the type and positioning of the acoustic event are accurately output, the calculation is simplified, and the phenotype of the model in a complex environment is significantly improved.

The application discloses a gradient water-collecting surface structure and a preparation method thereof. The gradient water-collecting surface structure comprises a substrate, a hydrophilic region and a hydrophobic region, and the hydrophilic region and the hydrophobic region are arranged on the surface of the substrate. The hydrophobic region has hydrophobicity. The hydrophilic region comprises a low-hydrophilicity subregion and a high-hydrophilicity subregion, and the high-hydrophilicity subregion is located between the low-hydrophilicity subregion and the hydrophobic region. The low-hydrophilicity subregion is provided with a first spherical array, and the high-hydrophilicity subregion is provided with a second spherical array. The specific surface area of the original copper oxide layer in the gradient water-collecting surface structure is increased, the contact area with water droplets is increased, and thus the water-collecting efficiency is improved. The first spherical array is composed of a plurality of first spherical protrusions, and the second spherical array is composed of a plurality of second spherical protrusions. The first spherical protrusions and the second spherical protrusions are both copper oxide. Compared with a copper single-element water-collecting surface, the wetting performance of the copper oxide is more stable when working in air, the copper oxide is not easy to be polluted, and the service life is greatly increased.

The invention relates to the technical field of image acquisition, in particular to an all-celestial-sphere space image acquisition device based on dynamic scanning, and solves the problems that when a space target is subjected to dynamic image acquisition in the prior art, multi-angle dynamic adjustment of an image acquisition structure is inconvenient, scanning dead angles easily exist in the angle adjustment process, and the image acquisition efficiency is high. The device comprises a spherical array type acquisition mechanism, a track adjusting mechanism and an image acquisition mechanism, the bottom end of the spherical array type acquisition mechanism is provided with a double-layer driving mechanism, the inner side of the spherical array type acquisition mechanism is provided with the track adjusting mechanism, and the upper end of the track adjusting mechanism is provided with the image acquisition mechanism. The spherical array type collecting mechanism comprises a first spherical shell, and a second spherical shell is installed at the upper end of the first spherical shell. According to the invention, by performing multi-angle adjustment on the image acquisition structure, dead-angle-free scanning and image acquisition on a dynamic space target can be satisfied, and the image acquisition angle can be conveniently displayed.

The invention provides a three-dimensional spherical array interferometer direction finding method based on MUSIC. The method comprises the following steps: constructing a spherical array; a uniform spherical array method is adopted, a direction finding device with array elements distributed in a spherical form is constructed, and position parameters of the array elements on an array plane are represented in a polar coordinate form; assuming a wave incidence parameter, taking the center of sphere as a reference zero phase point, and calculating receiving phase data of each array element under a plane wave incidence condition; performing snapshot sampling on the receiving phase data of each array element at a sampling rate to obtain a receiving matrix; calculating a covariance matrix of the receiving matrix to obtain an eigenvalue matrix and an eigenvector; estimating the number of signals according to the eigenvalue matrix, and dividing the eigenvector into a signal subspace and a noise subspace; and solving a spatial spectrum value in a search area by utilizing the characteristic that the signal is irrelevant to the noise subspace feature vector, and finding a position corresponding to the maximum value. The problem that the elevation direction finding precision of the two-dimensional planar array is rapidly reduced along with the increase of the elevation angle is solved.

The invention discloses a photovoltaic maximum power point detection and visualization system with a human-computer interaction interface, and belongs to the technical field of solar photovoltaic power generation. The photovoltaic maximum power point detection and visualization system is composed of a spherical detector array device, a multi-channel signal acquisition front end, a tracking and power generation part and an upper computer visualization analysis terminal. The spherical detector array device is of a hemispherical structure, a detector array is carried on the outer surface of the spherical detector array device, and the multi-path signal acquisition front end is connected with the spherical detector array device and is composed of an analog switch array module, a signal conditioning circuit module, an MCU control core module, a Lora wireless communication module, a man-machine interaction display module and a power monitoring module. According to the method, illumination distribution is directly detected by adopting a spherical array, and the actual maximum power point direction can be more accurately found in complex weather such as local shadow and cloudy weather; and a local human-computer interaction interface is integrated, so that field maintenance personnel can intuitively obtain a system state and a tracking target in real time.

The application particularly relates to a wind noise source directivity quantization evaluation method. The method comprises the following steps: S1, wind noise directivity test of an in-vehicle spherical array, arranging a spherical microphone array to obtain a spatial distribution nephogram of the in-vehicle wind noise source; S2, spatial angle partition of the wind noise directivity, decomposing the noise source according to spatial regions, and performing equi-angle partition on the in-vehicle space; S3, frequency decomposition of the wind noise directivity, constructing an information matrix according to different frequencies; S4, establishing a quantization evaluation index of space and frequency according to the sound source information matrix, and identifying a short board; and S5, combining the in-vehicle spherical array test position and the quantization evaluation index to form an evaluation method classified according to working conditions, and judging the wind noise source directivity level of a developed vehicle model. The spatial angle partition and frequency decomposition of the sound source effectively support the achievement of the whole vehicle wind noise performance target and the analysis of the wind noise problem.

The invention provides an Au / Ag-PS spherical array SERS (Surface Enhanced Raman Scattering) substrate with an annular gap as well as a preparation method and application of the Au / Ag-PS spherical array SERS substrate, and belongs to the technical field of Raman spectrum detection. The preparation method comprises the following steps: S1, forming a closely arranged periodic PS ball array on a substrate subjected to hydrophilization treatment, and forming gaps between PS balls through etching; s2, depositing a gold layer on the surface of the upper hemisphere of each PS ball, then overturning to enable the lower hemisphere of each PS ball to face upwards, and depositing a silver sacrificial layer and a gold layer on the surface of the lower hemisphere in sequence; and S3, downwards fixing the lower hemisphere of the PS sphere array on the silicon substrate, and corroding the silver sacrificial layer by adopting a silver removing solution to form an annular nano gap, so as to obtain the SERS substrate. According to the SERS substrate, the electromagnetic field enhancement effect is optimized by accurately controlling the size of the annular gap, and the sensitivity and reliability of pollutant detection are remarkably improved.

The invention discloses an ignition combustion experiment system based on acoustic levitation, and relates to the technical field of combustion experiment equipment, and a levitation device comprises a driving mechanism and a sound field generator; the sound field generator comprises a plurality of transducers, the transducers are distributed on the surface of the same virtual sphere in a three-dimensional symmetrical mode and form a spherical array, and sound waves generated by the transducers are interfered and superposed in a sphere center area of the spherical array to form a three-dimensional standing wave field which is used for enabling an object to be suspended to suspend in the sphere center area of the spherical array; the driving mechanism is electrically connected with each transducer and is used for providing an adjustable electric signal capable of driving each transducer to work; the ignition device comprises a laser igniter; the laser igniter is used for emitting a laser main beam irradiated on the surface of one side of an object to be suspended; the measuring device is used for collecting data of the whole process from ignition starting to complete combustion of the object to be suspended, so that the problems existing in the prior art are solved, and the suspension capacity and stability of the whole device are higher.

The invention relates to the technical field of pressure testing, and discloses an omni-directional pressure measuring system and method.The omni-directional pressure measuring system comprises a spherical piezoelectric sensor array module, a signal conditioning module, a signal storage and transmission module and an upper computer; the data are processed by the signal conditioning module and transmitted to the upper computer through the storage and transmission module, the pressure field intensity and the pressure source position of each point are calculated on the upper computer, and the pressure field is reconstructed by using the data. According to the invention, the design of the spherical array with the regular dodecahedron vertex topology is adopted, so that the system realizes multi-angle information acquisition and depth perception, and a detection blind area is eliminated; according to the method, the weighting function is constructed in the spherical coordinate system, the pressure intensity of each point in the space is calculated through weighted average, then the initial position of the pressure source is estimated according to the square of the measured value, and accurate positioning is performed in combination with the iterative algorithm. According to the invention, the measurement precision and efficiency are improved, and the dynamic pressure field can be reconstructed.

The application relates to the technical field of detectors, and provides a spherical array Fresnel lens, a detector and a security system, wherein the spherical array Fresnel lens comprises a lens body, the lens body has an inner spherical surface and an outer spherical surface; a center lens sheet layer is arranged at the center of the inner spherical surface of the lens body, and the inner spherical surface of the lens body is further provided with a plurality of annular lens sheet layers; the center lens sheet layer comprises one Fresnel lens element, and the annular lens sheet layer comprises a plurality of Fresnel lens elements; the detector comprises the spherical array Fresnel lens; and the security system comprises the detector. The spherical array Fresnel lens, the detector and the security system provided by the application can be simultaneously applied to a wall-mounted installation mode and a ceiling-mounted installation mode while meeting the requirements of detection angles and detection distances.

The invention discloses a near-field simulation device for any electromagnetic scene, and belongs to the technical field of electromagnetic testing and simulation. The device is mainly composed of a target field, a near-field comprehensive method and a near-field comprehensive phased array plane. By optimizing the unit excitation weighting of the phased array aperture array plane, the integration of any target field can be realized on the near-field integration plane, and the phased array aperture array plane needs to be arranged according to the highest spatial frequency of the target field. If the highest spatial frequency of the target field is relatively small and the distance between the phased array aperture array plane units is required to be relatively large, the phased array aperture array plane can be a planar array; if the highest spatial frequency of the target field is large, the distance between the phased array aperture array plane units is required to be small, and the space field angle of the phased array plane is required to be large, the phased array aperture array plane needs to be a cylindrical array or a spherical array. According to the invention, near-field simulation of any electromagnetic scene can be realized, and the system has the advantages of compact system, materialization of electromagnetic environment simulation and high fidelity, and can be applied to physical electromagnetic environment simulation in the fields of radar target scenes, communication channel scenes and the like.

This invention discloses an asynchronous measurement technique for 3D imaging of multi-point, non-planar low-frequency sound sources. It utilizes two 64-channel 3D spherical arrays for asynchronous measurement, proposing a unique dual-cylindrical spiral ascent and rotation movement method to achieve 3D point source imaging within low-frequency sound sources. This method differs from previous directional methods. It employs an asynchronous measurement technique involving the centers of two spherical arrays following a designed dual-cylindrical spiral parallel ascent trajectory and the array's rotation, applied to 3D imaging of multi-point, non-planar low-frequency sound sources. This results in a larger and denser array. To a certain extent, the asynchronous measurement method combining the dual-cylindrical spiral trajectory and rotation further improves the density of synthesized microphones compared to cylindrical trajectory asynchronous measurement methods and spherical array center revolution-rotation asynchronous measurement methods. The method is stable and efficient.

The invention discloses a vacuum sealing plate based on a sphere array and a split type vacuum hot pressing preparation method thereof, and belongs to the field of materials, the vacuum sealing plate is formed by hot pressing fusion of an upper function plate and a lower function plate in a vacuum environment, and a two-dimensional array formed by countless independent vacuum sphere units is formed in the vacuum sealing plate. Respectively prefabricating an upper functional board and a lower functional board which are provided with hemispherical pit arrays through injection molding; the prefabricated upper function plate is loaded into a vacuum operation chamber and accurately aligned, and vacuumizing is conducted till the vacuum degree is smaller than or equal to 1 Pa; the butt joint faces of the upper function plate and the lower function plate are heated to be in a molten state, pressure is applied to enable the upper function plate and the lower function plate to be folded, and the two corresponding hemispherical pits are sealed into an independent vacuum sphere unit; and maintaining pressure and cooling to obtain a finished product. The prepared multi-cavity vacuum sealing plate has excellent sound insulation and heat insulation performance, extremely high structural reliability, excellent bending performance and convenient secondary processability which other single-cavity vacuum plates do not have, and can be widely applied to the fields of vehicle light weight and building energy saving.

The invention discloses a multi-sensor efficient integration verification method, system and device based on multiple phase centers and a medium, and relates to the field of radio frequency sensor dynamic integration verification. Aiming at the defect that a single-phase center of a traditional darkroom cannot verify multiple sensors at the same time, multiple phase centers in the same airspace are constructed in the darkroom based on a multi-band triple spherical array radiating antenna, and tested equipment is deployed through multiple synchronously-controlled six-degree-of-freedom motion platforms to ensure attitude consistency; the system master console resolves scene parameters in real time, and high-precision angle and echo simulation is carried out through the array feed control subsystem and the comprehensive signal source; cooperative verification of electronic reconnaissance interception guide radar tracking and radar tracking guide attribute identification is realized in a closed loop. According to the method, the physical space limitation of a darkroom is broken through, a complex space three-dimensional dynamic interaction scene is reproduced with high confidence, and the blank of complete machine multi-sensor cooperative capability integrated verification is filled.

The invention relates to the technical field of medical instruments and information, and discloses an oral cavity scanner and an oral cavity scanning method, and a self-adaptive flexible shell, the appearance of the self-adaptive flexible shell is set to be of a spherical structure matched with the geometrical shape of the human oral cavity, and the self-adaptive flexible shell is made of a biocompatible elastic material; a rubber bracket is arranged in the self-adaptive flexible shell to limit the relative spatial relationship of the imaging array, and the self-adaptive flexible shell has preset Shore hardness to keep the relative topological reference of internal components through the rubber bracket when the self-adaptive flexible shell is pressed to deform. By means of the spherical array topology and the 140-degree wide-angle macro lens, 360-degree full coverage of the inner wall of the oral cavity is achieved, the problem of collection dead angles of a traditional handheld device in a posterior molar area, a lingual area and the edge of gingiva is solved, handheld guiding is replaced with a self-adaptive flexible sphere holding mode, a user does not need to have professional anatomical knowledge or steady-state control ability, and the user experience is improved. And the operation difficulty in a home scene is greatly reduced.

The invention provides a three-dimensional dereverberation beam forming method and system based on a cross-correlation matrix, and relates to the technical field of sound source recognition, and the method comprises the steps: collecting sound pressure data through a spherical microphone array; performing fast Fourier transform on the sound pressure data to obtain corresponding frequency domain data; calculating a cross-spectrum matrix corresponding to the spherical array according to the frequency domain data; eliminating reflected sound components contained in the cross-spectrum matrix to obtain a filtered cross-spectrum matrix; and drawing a sound source identification cloud picture based on the filtered cross spectrum matrix. According to the three-dimensional dereverberation beam forming method based on the cross-correlation matrix, the technical problem of insufficient sound source recognition precision of a spherical array in a complex sound field environment in the related technology is solved.

The utility model discloses an environment radio signal collector comprising a wing-shaped member, the wing-shaped member is provided with a main body part, and a first wing end, a second wing end, a third wing end and a fourth wing end which are respectively integrated with the main body part. The ball array is located at the fourth wing end and fixedly connected with the fourth wing end. A connecting structure is arranged between the first linear array and the main body part, the top of the connecting structure is fixedly connected with the first linear array, and the bottom of the connecting structure is fixedly connected with the main body part. The environmental radio signal collector disclosed by the utility model has the beneficial effects that enough spacing is reserved between the spherical array and other environmental radio signal collecting devices such as the first linear array, so that mutual interference is avoided.

The invention provides a method and a system for preparing a micro-lens spherical array. The method comprises the following steps: spin-coating a first photoresist on the front surface of a silicon wafer; exposing and developing the first photoresist to obtain a plurality of local glue column arrays, wherein each local glue column array comprises a plurality of local glue columns; according to the plurality of local glue column arrays, the front surface is etched to obtain a plurality of local silicon column arrays, and each local silicon column array comprises a plurality of local silicon columns; coating a second photoresist on the front surface; second photoresist covers the faces, close to the front face, of the multiple local silicon column arrays through the photoetching technology and the overlay technology to obtain a micro-lens glue column array, the micro-lens glue column array comprises a plurality of micro-lens glue columns, and each micro-lens glue column covers the multiple local silicon columns of the corresponding local silicon column array; and heating the micro-lens rubber column array so as to soften and mold the plurality of micro-lens rubber columns to obtain the micro-lens spherical array. By controlling the formed local silicon column array, the size of the contact angle of the micro-lens spherical array can be controlled.

The invention provides an abnormal sound detection method and system for an air conditioner production line. The abnormal sound detection method comprises the steps that sound signals are obtained in real time through a microphone spherical array; processing the sound signal based on an HOA-SHT domain analysis framework to generate a panoramic sound image; obtaining an air conditioner image through a panoramic camera; locking an air conditioner area according to the air conditioner image; multi-modal positioning is conducted on the air conditioner area through the panoramic sound image, and a target area is obtained; performing sound signal extraction on the target area through a multi-scale Mel spectrum, and inputting the extracted sound signal into a beam former of a neural network to obtain a noise signal; the noise signals are detected and recognized through an anomaly classifier based on the convolutional neural network, and an air conditioner abnormal sound classification result is obtained; according to the invention, efficient and accurate detection of the abnormal sound of the air conditioner hanging unit is realized, the limitation of a traditional manual detection method is effectively overcome, the production efficiency is remarkably improved, the false detection rate and the omission ratio are reduced, and powerful guarantee is provided for the production line quality.