23results about How to "Improve angular resolution" patented technology

The invention discloses a single-frequency pulse laser source multi-dimensional imaging system and method, and belongs to the technical field of laser radars. The imaging system comprises a single-frequency pulse laser source module, an optical imaging module, a frequency shift and phase modulation module, a time sequence control module and a data processing module, the single-frequency pulse laser source module emits a detection light beam, a first local reference light beam and a second local reference light beam, and the detection light beam irradiates a target to generate a reflection light beam; the time sequence control module controls the three light beams to perform synchronous frequency shift, so that the first local reference light and the reflected light beam are coherent in the optical imaging module to form a holographic image, and the second local reference light beam and the partially reflected light beam generate a beat frequency signal in the frequency shift phase modulation module; the data processing module analyzes the beat frequency signal so as to adjust the initial phase and frequency of outgoing of the detection light beam, and dynamic coherent imaging of the reflected light beam and the first local reference light in the optical imaging module is ensured; and real-time information of the holographic image is analyzed, and a high-quality three-dimensional image is reconstructed.

The invention relates to a beam control device and a communication-sensing integrated system. The device comprises a plurality of first antenna port groups and at least one second antenna port group, a plurality of first beam channel groups and at least one second beam channel group, the first beam channel groups are connected with the first antenna port group, and the second beam channel group is connected with the second antenna port group; a first signal end and a second signal end, the first signal end is used for connecting a first radio frequency end, and the second signal end is used for connecting a second radio frequency end; the change-over switch is configured to selectively: gate the first signal end to the plurality of first antenna port groups, and gate the second signal end to the at least one second antenna port group; or, gating the first signal end to one part of the plurality of first antenna port groups, and gating the second signal end to the other part of the plurality of first antenna port groups. According to the invention, the sensing function of ISAC can be supported at low cost and high angle resolution on a communication system platform.

The invention discloses a device and method for tracking the angle of a long-distance target object, and the device comprises a laser transmitting and receiving end and a target object, and the laser transmitting and receiving end is disposed on a precise adjustment mechanism. The precise adjusting mechanism is used for bearing the laser transmitting and receiving end and adjusting a laser incident angle to realize continuous tracking of a target; the laser transmitting and receiving end comprises a transmitting module and a receiving module; the transmitting module is used for transmitting a beam of wide-spectrum detection laser with a small divergence angle to a long-distance target object; the transmitting module comprises a wide-spectrum laser and a light beam expanding system, the wide-spectrum laser is electrically connected with the high-stability temperature control and current driving system, and the receiving module comprises an optical receiving module and a data processing and control module. The initial wavelength lambda is taken as the reference in each measurement, no accumulative error exists, and the method is very suitable for long-term and continuous monitoring tasks.

The present invention discloses a phase-type SPR sensing system and application without phase modulation structure. The phase-type SPR sensing system comprises an incident angle adjustment device, an SPR sensing module, a beam splitter, a polarizer, an imaging lens, and a CCD; the beam expansion light excites the SPR sensing module to produce an SPR phenomenon, and the outgoing light carries phase information, which is decomposed into three paths through two beam splitters. After the three light paths pass through the polarizer and the imaging lens respectively, the CCD detects the p-polarized light, the s-polarized light and its 45° polarization interference light intensity. The angle adjustment device adjusts the incident angle to the SPR angle that minimizes the p-light intensity according to the outgoing p-light intensity, and then extracts the phase information according to the light intensity detected by the three CCDs. The present invention adopts an incident angle adjustment device to improve the angular resolution of the phase-type SPR sensor, and at the same time, based on the polarization interference method, respectively detects two polarized lights and their polarization interference light intensities to extract the phase information, and has the characteristics of simple structure, stability, high cost and low cost.

The application provides a solid-state laser radar built in a vehicle headlamp and a point cloud processing method, comprising: a vehicle lamp shell, which is internally separated into an illumination cabin and a radar cabin, and a heat insulation layer is arranged between the illumination cabin and the radar cabin; a solid-state laser radar is arranged in the radar cabin and comprises a VCSEL emission array, a SPAD receiving array and a signal processing and control circuit; a heat dissipation layer is arranged in the radar cabin; based on the above structure, the application provides a solid-state laser radar point cloud processing method built in a vehicle headlamp, wherein the solid-state laser radar is two, a first solid-state laser radar installed in a left front vehicle lamp and a second solid-state laser radar installed in a right front vehicle lamp, which can not only improve the field of view range, but also form a field of view overlapping area in front of the vehicle, so that the point cloud monitoring density and accuracy in the overlapping area are significantly improved.

The invention discloses a direction of arrival estimation method, an integrated circuit, a radio device and terminal equipment. The method comprises the following steps: determining a fuzzy array and a non-fuzzy array in an antenna array; estimating an incident angle of a received signal by using a fuzzy array to obtain a plurality of possible incident angle combinations, the incident angle combinations comprising one or more incident angles; and projecting a plurality of possible incident angle combinations onto the unambiguous array, and determining the incident angle combination corresponding to the maximum energy after projection as the incident angle combination after ambiguity resolution.

A method and apparatus for super-resolution localization of multiple targets using frequency-modulated continuous wave radar includes: determining the number K of targets based on the number of eigenvalues ​​satisfying a condition in the covariance matrix of the acquired radar array signal; finding the frequency values ​​corresponding to the K largest spectral peaks based on the acquired number of targets K, using these frequency values ​​as coarsely estimated intermediate frequency (IF) values, and determining the final IF value using the coarsely estimated IF values; calculating the distance of the corresponding target relative to the center O of the antenna array based on the final IF value; obtaining the noise subspace of the array signal and the steering vector related to the target distance and angle based on the eigenvalues ​​of the covariance matrix of the array signal, constructing a MUSIC spectral function, and determining the estimated value of the target echo signal direction; and then determining the position of the corresponding target. This invention has higher range and angle resolution and lower algorithm complexity, enabling super-resolution localization of multiple targets.

The invention discloses a millimeter wave radar angular resolution testing device and method, and the device comprises a first camera obscura formed by splicing a plurality of second camera obscura, the inner wall of each second camera obscura is provided with a wave absorbing layer, the interior of the second camera obscura at the head end is provided with a mechanical rotary table, a top clamp of the mechanical rotary table is connected with a to-be-tested radar in a clamping manner, and the to-be-tested radar is provided with a wave absorbing layer. An electric arc-shaped sliding rail is arranged in the second camera obscura at the tail end, and a first corner reflector and a second corner reflector are connected to the two movable ends of the electric arc-shaped sliding rail respectively. The method has the advantages that the automobile radar angular resolution test limit can be improved, the method has the advantages of a traditional darkroom scheme, meanwhile, the equipment cost is reduced compared with the traditional darkroom scheme, the box-type scheme further has the advantage of expandability, and the method can be widely applied to measurement of radars with higher angular resolution in the future. The number of the second camera bellows can be increased and the arc guide rail can be replaced on the basis of existing equipment.

An azimuth angle determination method, device, electronic equipment and storage medium are disclosed. The azimuth angle determination method comprises: determining a first angle spectrum corresponding to a first group of array elements in an antenna array; determining a second angle spectrum corresponding to a second group of array elements according to the output of adaptive beamforming of the second group of array elements; and determining a target azimuth angle according to the first angle spectrum and the second angle spectrum. Through the above technical solution, different combinations of antenna array elements are used to determine the target azimuth angle according to the angle spectrum of different antenna array elements, angle deblurring is realized, and the problem of angle ambiguity is solved while improving the angle resolution of the sparse array, thereby reducing the requirement for adjusting the grating lobe position through the optimization design of the antenna array element spacing.

The utility model relates to the technical field of millimeter wave radars, in particular to an eight-transmitting and eight-receiving dual-chip 4D millimeter wave radar antenna array, which comprises eight transmitting antennas and eight receiving antennas, and the transmitting antennas and the receiving antennas are arranged in the horizontal direction and the pitching direction in a physical space. According to the utility model, the eight transmitting antennas and the eight receiving antennas are arranged, the transmitting antennas and the receiving antennas are distributed in the horizontal direction and the pitching direction in a physical space according to a certain rule, and the array element coordinates of the transmitting antennas and the receiving antennas are distributed in a differentiated manner according to a preset optimization algorithm instead of being simply and uniformly distributed; therefore, the equivalent array synthesized by the virtual channels has better sidelobe performance and higher angular resolution.

The utility model discloses a 4D millimeter-wave radar antenna array and a 4D millimeter-wave radar, which are applied to the technical field of millimeter-wave radars, a transmitting antenna array comprises a plurality of transmitting array elements, and a receiving antenna array comprises a plurality of receiving array elements; the transmitting antenna array comprises a horizontal transmitting antenna sub-array distributed in the horizontal direction and a vertical transmitting antenna sub-array distributed in the vertical direction, and the receiving antenna array comprises a horizontal receiving antenna sub-array distributed in the horizontal direction and a vertical receiving antenna sub-array distributed in the vertical direction. An antenna aperture with a large size is formed through the MIMO technology, so that the 4D millimeter wave radar antenna array has high angular resolution in both the horizontal direction and the vertical direction.

The application discloses a millimeter wave radar-based super-resolution angle estimation method, which comprises the following steps: obtaining multi-element sampling data by receiving echo signals of a transmitting antenna by a receiving antenna; adding a Hanning window in a distance dimension and a speed dimension respectively; performing multi-channel non-coherent accumulation to improve signal-to-noise ratio; performing two-dimensional CFAR detection on the two-dimensional matrix data after non-coherent accumulation, performing CA-CFAR detection in the distance dimension and OS-CFAR detection in the speed dimension respectively, and obtaining matrix data containing a target; resolving and aggregating target points in a point trace condensation mode, so as to form a unique target point trace, and saving distance unit information and speed unit information of the target; and estimating a target azimuth by using an improved forward-backward Root-MUSIC algorithm on the multi-element data after compensation. The method considers that the forward-backward direction only uses the covariance matrix on the main diagonal line, and the application has a significant improvement in angle resolution and angle measurement accuracy.

The utility model provides a camera lens device based on wavefront coding, and belongs to the technical field of optical detection. The camera lens device based on wavefront coding comprises a lens barrel and an industrial camera, the rear end of the lens barrel is connected with the industrial camera, an original infrared lens is installed in the lens barrel, a phase plate is fixed at the front end of the lens barrel, and a diaphragm is arranged between the phase plate and the original infrared lens. A phase plate is added, and the depth of field of the camera is expanded by using an encoding-decoding method, so that the measurement precision of the infrared deflection technology is improved; a wavefront coding method is adopted, so that the system is insensitive to defocus, and coding is realized by adding a phase plate into a camera lens; the phase plate is added, and the depth of field of the lens is expanded, so that in infrared deflection measurement, the camera can clearly image the measured lens and the light source, the position resolution and the angle resolution are improved, and the surface type reconstruction precision is improved.

The invention discloses an underwater target detection and positioning method and system based on a passive sonar array, and relates to the technical field of underwater acoustic signal processing. Acoustic signals radiated by an underwater target are received and divided into dense subarray data and sparse subarray data; performing a sparse Bayesian learning algorithm on the sparse subarray data, and outputting a high-precision fuzzy value; carrying out azimuth estimation on the dense subarray data in a full-angle range through a dense part to obtain a low-precision unambiguous value; and fusing the high-precision fuzzy value and the low-precision non-fuzzy value through an estimation matching model to obtain an orientation estimation result of the underwater target. According to the method, high-precision azimuth estimation is carried out based on the combination of the ternary co-prime array and the compressed grid sparse Bayesian learning, high-precision (but fuzzy) estimation is carried out by utilizing the sparse part of the TCA array, low-precision (but non-fuzzy) estimation is carried out by utilizing the dense part, and high-precision target azimuth estimation under low operand is realized.

The utility model relates to the technical field of millimeter wave radars, in particular to an eight-transmitting and eight-receiving dual-chip 4D millimeter wave radar antenna array, which comprises eight transmitting antennas and eight receiving antennas, and the transmitting antennas and the receiving antennas are arranged in the horizontal direction and the pitching direction in a physical space. According to the utility model, the eight transmitting antennas and the eight receiving antennas are arranged, the transmitting antennas and the receiving antennas are distributed in the horizontal direction and the pitching direction in a physical space according to a certain rule, and the array element coordinates of the transmitting antennas and the receiving antennas are distributed in a differentiated manner according to a preset optimization algorithm instead of being simply and uniformly distributed; therefore, the equivalent array synthesized by the virtual channels has better sidelobe performance and higher angular resolution.

The present invention discloses an optical lens, which includes, from the object side to the imaging surface along the optical axis, a first lens with negative optical power; a second lens with negative optical power; a third lens with positive optical power; a fourth lens with negative optical power; a fifth lens with positive optical power; a sixth lens with positive optical power; a seventh lens with negative optical power; and an eighth lens with positive optical power. The present invention adopts eight lenses, and through specific surface shape settings and reasonable optical power distribution, especially the first and second lenses adopt negative optical power, the optical lens can collect a wide range of light and improve the field of view of the optical lens. At the same time, by setting the optical lens to have a large positive distortion, the marginal field of view ratio can be effectively increased, and the angular resolution of the marginal field of view can be improved.

The application provides a light beam pointing compensation adjusting mechanism based on a double-axis folding beam structure and a working method, and relates to the technical fields of precise optical instruments and micro-motion devices.The mechanism comprises a fixed unit, an optical deflection unit and a flexible motion unit; the fixed unit is a hollow cylindrical structure; the optical deflection unit is located at the geometric center of the mechanism and comprises an optical fixed cylinder and a V-shaped optical prism group fixed in the cylinder; the optical fixed cylinder is provided with a light transmission hole; the flexible motion unit is arranged between the fixed unit and the optical deflection unit in the circumferential direction and comprises two groups of positive Poisson's ratio structures and negative Poisson's ratio structures arranged oppositely and a moving plate connected with each Poisson's ratio structure; each Poisson's ratio structure is a multi-stage folding beam structure, one end of which is connected with the optical fixed cylinder and the other end is indirectly connected with the fixed unit through the corresponding moving plate. The application simultaneously realizes light path compression, optical-mechanical integrated integration and high-resolution double-axis pointing compensation in a single structure.

This invention provides an optical lens and an electronic device having the same. The optical lens includes: a first lens with negative optical power, having a first convex side and a second concave side; a second lens with negative optical power, having a first concave side and a second convex side; a third lens with positive optical power, having a first convex side and a second convex side; a fourth lens with positive optical power, having a first convex side and a second convex side; a fifth lens with negative optical power, a sixth lens with positive optical power, and a seventh lens with negative optical power; or a fifth lens with positive optical power, a sixth lens with negative optical power, and a seventh lens with positive optical power; satisfying: (FOV×F) / H≥95. This invention solves at least one of the problems in existing optical lenses: the inability to simultaneously achieve miniaturization and high resolution, pixel differences, poor image quality in low-light environments, and the inability to match the center angular resolution with higher pixel chips while satisfying a large field of view.

This application provides a channel angle estimation method, apparatus, electronic device, and readable storage medium, comprising: acquiring a discrete beam set of a preset angle domain and the pointing angle, radiation pattern, and received power corresponding to each beam in the discrete beam set; determining a center beam and acquiring the power difference ratio between the center beam and a target neighboring beam, wherein the center beam is the beam corresponding to the larger value of the received power, and the target neighboring beam is one of the adjacent beams surrounding the angle domain of the center beam; mapping the power difference ratio to an angle offset according to the radiation pattern corresponding to the center beam; and correcting the pointing angle corresponding to the center beam according to the angle offset to obtain the estimated angle. This improves the angle resolution while maintaining existing stepping. Furthermore, it only requires amplitude / power data to operate, with low dependence on phase and strict calibration. It also eliminates the need for eigenvalue decomposition or large-scale iteration, facilitating real-time implementation on existing host computers or embedded processors.

This invention relates to the field of millimeter-wave radar technology, specifically to a dual-chip 4D vehicle-mounted millimeter-wave radar antenna array, comprising 6 transmitting antennas and 8 receiving antennas; wherein the transmitting and receiving antennas are arranged in the horizontal and elevation directions in physical space. This invention achieves high aperture utilization of the antenna array through a non-uniform, differentiated array design, while leaving sufficient space for PCB components and RF wiring; through the layout of 6 transmitting antennas and 8 receiving antennas, multiple equivalent arrays can be synthesized in the horizontal and elevation directions using virtual channel technology, improving angular resolution; the layout fully considers grating lobe and sidelobe suppression, effectively improving artifact and interference problems in the target detection process.

The utility model discloses a hand -operated pulse generator, solve the malpractice that exists in the operation feeling aspect of hand -operated pulse generator. It includes metal main body frame, rear housing, main shaft, bearing assembly, handle, strong magnetic block, gear shape tray, printed circuit board, hall sensor chip and magnet, the rear housing and metal main body frame constitute an installation cavity, just the main shaft passes through bearing assembly mechanical installation in metal main body frame, and handle is installed in the front end of main shaft, the printed circuit board is fixed in the installation cavity, and the printed circuit board has the hall sensor chip of pairing arrangement with the magnet rear end of main shaft, the strong magnetic block and gear shape tray of mutual adhesion cooperation all are with main shaft mechanical fixed connection, and is provided on the gear shape tray and sets up the gear protrusion, and the gear protrusion has the configuration of equal proportion along the circumferential direction with the convex of setting in the inner wall of metal main body frame, and the main shaft rotation drives the gear protrusion and convex relative movement and produces the clear magnetic attraction type rotation touch feeling.

This application provides a signal processing method for MIMO millimeter-wave radar. The MIMO millimeter-wave radar includes m transmitting antennas and x receiving antennas, wherein the m transmitting antennas and x receiving antennas are non-uniformly distributed, and m and x are both positive integers. The signal processing method for MIMO millimeter-wave radar includes: randomly controlling the m transmitting antennas to transmit detection signals; calculating the echo signals formed by the reflection of the detection signals from the target object through n virtual receiving channels, wherein the x receiving antennas and m transmitting antennas form n virtual receiving channels, and n is equal to the product of m and x; mixing the reference signal and the echo signal to obtain a processed signal; performing tensor completion on the processed signal to obtain a completed signal; and calculating the target distance, target velocity, and target angle of the target object based on the completed signal. Furthermore, this application also provides a main control device and a MIMO millimeter-wave radar. The signal processing method provided in this application can effectively improve the angular resolution of millimeter-wave radar.

The utility model relates to the technical field of millimeter wave radars, in particular to an eight-transmitting and eight-receiving dual-chip 4D millimeter wave radar antenna array, which comprises eight transmitting antennas and eight receiving antennas, and the transmitting antennas and the receiving antennas are arranged in the horizontal direction and the pitching direction in a physical space. According to the utility model, the eight transmitting antennas and the eight receiving antennas are arranged, the transmitting antennas and the receiving antennas are distributed in the horizontal direction and the pitching direction in a physical space according to a certain rule, and the array element coordinates of the transmitting antennas and the receiving antennas are distributed in a differentiated manner according to a preset optimization algorithm instead of being simply and uniformly distributed; therefore, the equivalent array synthesized by the virtual channels has better sidelobe performance and higher angular resolution.