751 results about "Detector array" patented technology

The invention provides a wavelength adjustment method, device and equipment for an LED detection light source and a storage medium, and the method comprises the steps: transmitting multiband incident light through an LED light source array, and receiving reflected light or transmission light of a detection object through a photoelectric detector array, thereby obtaining the spectral feature data of the detection object. And according to the spectral feature data, calculating a signal-to-noise ratio value and a feature response difference value of each wavelength interval, and performing multi-target parameter optimization in combination with a background noise coefficient of the detection object to obtain an optimal detection wavelength parameter group. And then, through linkage control of the driving current and the chip temperature of the LED light source array, matching output signals of multiple groups of wavelengths are obtained. And adjusting the wavelength of the LED light source array according to the compensated optimal detection wavelength parameter group. According to the method, adaptive wavelength adjustment can be carried out according to the spectral characteristics of the detected object, light source output is optimized, the signal-to-noise ratio is improved, the detection precision is further improved, and the method has remarkable advantages in optical detection application in a complex environment.

The invention provides a self-adaptive dual-energy pulse X-ray detection system and a detection method. The self-adaptive dual-energy pulse X-ray detection system comprises a dual-energy X-ray emission module, a pulse modulation and high-voltage power supply module, a detector array and a self-adaptive control system, wherein the dual-energy X-ray emission module is in signal connection with the pulse modulation and high-voltage power supply module; the detector array is positioned on the opposite side of a detected object; and the self-adaptive control system is in signal connection with the pulse modulation and high-voltage power supply module. The self-adaptive dual-energy pulse X-ray detection system and the self-adaptive dual-energy pulse X-ray detection method have high penetrating power, and the problems of fuzzy recognition and generation of image blind areas can be effectively avoided.

The invention discloses a multi-core-particle optical matrix calculation framework, which is characterized in that a block matrix is adopted to decompose a large-scale optical matrix calculation chip into a plurality of small-scale optical matrix calculation core particles, and active and passive separation is adopted to decompose the optical matrix calculation chip into modulator array core particles, detector array core particles and optical matrix calculation core particles. Decomposing the M * N matrix A into m * n p * q matrixes Aij; an input N-dimensional vector X is decomposed into n-channel q-dimensional vectors Xj, and an output M-dimensional vector Y is decomposed into m p-dimensional vectors Yi. Input light passes through the n modulator array core particles to form n channel q-dimensional vectors, m * n q-dimensional vectors are formed after m beam splitting copying, the m * n q-dimensional vectors are input into the m * n optical matrix calculation core particles respectively and multiplied by Aij to obtain m * n p-dimensional vectors, m p-dimensional vectors are obtained after the light of the n channels passes through n channel multiplexing (wavelength division multiplexing, polarization multiplexing, mode multiplexing and the like and multi-dimensional multiplexing), and m * n p-dimensional vectors are obtained. And then detection is carried out, and large-scale matrix-vector multiplication calculation Y = AX is realized.

A lidar system uses a detector chip have a first column of light sensors and a second column of light sensors, arranged to detect light from pulses of laser light reflected by one or more objects in the environment. The second column of light sensors is arranged to scan a field of view before the first column of light sensor. A processor can adjust power of the emitter, or adjust detector gain of the first column of light sensors, in response to data from the second column of light sensors scanning the field of view, so that light in a dynamic range of the first column of sensors can be used to generate data for a three-dimensional point cloud.

The embodiment of the invention discloses a light path device of a visible near-infrared detector array test calibration system, and the light path device of the visible near-infrared detector array test calibration system comprises a single photon source module which is used for generating near-infrared photons; the visible light generation module is used for generating visible light; and the optical focusing module adopts a coaxial light path and is used for focusing the photons output by the single photon source module and the visible light output by the visible light generation module to a photosensitive surface of the detector array to be tested.

The invention discloses a mine microseismic event self-positioning method and a mine microseismic event self-positioning system without a prior velocity structure, which realize integration of underground velocity structure inversion and seismic source positioning by jointly utilizing microseismic signals and surface wave interference noise generated in a mining process. Comprising the following steps: arranging an earth surface detector array to collect micro-motion and micro-seismic mixed signals; extracting a surface wave dispersion curve to invert a stratum S-wave velocity model, and further constructing a P-wave velocity model when the stratum Poisson's ratio in the geological data is known; carrying out seismic phase pickup after carrying out noise reduction on the microseismic signal, and obtaining first arrival time of a P wave and an S wave; and constructing a target function taking the first arrival time, the seismic source position, the seismic moment and the velocity model as parameters, and optimizing the target function to realize accurate positioning. According to the method, early-stage field acoustic logging construction of a mine is avoided, surface wave interference noise is fully utilized, the utilization rate of monitoring data is improved, and mine microseism event positioning without a prior speed structure is achieved.

The invention discloses an intermediate infrared polarization spectrum imaging method and device. The method comprises the following steps: carrying out joint coding on an intermediate infrared light beam carrying to-be-measured target space, spectrum and polarization information by adopting an intermediate infrared polarization spectrum modulator consisting of metasurface units which are arranged in an array and have non-correlation response characteristics; projecting the coding light field to a two-dimensional detector array to generate a two-dimensional coding image under single exposure; and decoding the two-dimensional coding image through a reconstruction unit so as to reconstruct and obtain a space-spectrum-polarization four-dimensional data cube of the target to be measured. The problem that polarization information cannot be rapidly obtained in the prior art is solved, target full information can be obtained under single exposure, and the system has the advantages of being high in imaging speed, simple in structure, easy to miniaturize and the like.

The present invention provides a transceiving coaxial phased array LiDAR chip and a control method therefor. The transceiving coaxial phased array LiDAR chip comprises: a laser emitting unit, a general beam splitter, a transceiving phased array, a balanced detector array and a signal processing and control unit; a phase modulator of a phased array unit in the transceiving phased array is separately connected to light-exit paths of the general beam splitter, and performs phase modulation on light output by the general beam splitter; after that, the light is divided into reference light and signal light, the signal light passing through a first port and a second port of a circulator and then being radiated by grating radiation antennas into a free space, and the reference light passing through a frequency shifter and then being input into a 90-degree optical mixer together with an echo optical signal returned by a third port of the circulator; then, balanced detectors receive output signals, convert same into electric signals and transmit same to the signal processing and control unit, so as to calculate three-dimensional depth and / or speed information of a target region. By means of a transceiving coaxial phased array LiDAR and a coherent detection means, the present invention achieves chip integration of a transmitting end and a detection end of the LiDAR, and has higher signal-to-noise ratio and integration degree compared with traditional LiDAR systems.

A positron emission tomography (PET) scanner includes a plurality of gamma radiation detector modules arranged to form a detector ring. Each detector module includes an array of scintillator detectors. Each scintillator detector comprises a monolithic scintillation crystal and a plurality of photodetector arrays, such as silicon photomultipliers (SiPMs). A photodetector array is positioned on at least two nonparallel faces of each scintillation crystal. In some examples, a photodetector array is positioned on each of three orthogonal faces of each scintillation crystal.

The invention discloses an array type optical fiber ultrasonic imaging system based on multi-path delay parallel detection, and belongs to the technical field of ultrasonic detection and imaging. The main working process of the system is as follows: continuous laser output by a laser is modulated into pulse laser to be transmitted to an optical fiber ultrasonic detector array, and ultrasonic waves emitted by an ultrasonic wave generating device act on each detection array element to cause the property change of a detection optical signal; through multi-path time delay with the optical fiber as the medium, the detection optical signal forms different transmission time in each channel, is distinguished in a time division mode and is combined into a single path to be output. After photoelectric conversion, electric signals containing multi-channel detection information are collected in parallel, the signals are analyzed at a terminal processor by means of an imaging algorithm with an array parallel architecture, information of a to-be-detected target is obtained, and image reconstruction is completed. The array type optical fiber ultrasonic imaging system has the advantages of being accurate and rapid in scanning detection, simple and compact in system structure and efficient and high-quality in image reconstruction, and large-scale and low-cost array type optical fiber ultrasonic imaging is achieved.

This invention provides a Rydberg-atom based electromagnetic field detector array comprising a plurality of Rydberg-atom based electromagnetic field detectors, wherein each Rydberg-atom based electromagnetic field detector is divided into a plurality of units, each unit of the plurality of units being either: a variable transparency unit configured to vary its transparency by the Electromagnetically Induced Transparency, EIT, effect and further vary its transparency in response to an incident electromagnetic field, or a separator unit, wherein a sequence of one or more variable transparency units and one or more separator units of the plurality of units for a Rydberg-atom based electromagnetic field detector uniquely identifies that Rydberg-atom based electromagnetic field detector in the Rydberg-atom based electromagnetic field detector array.

The invention discloses a hybrid neutron gamma detector array and a signal processing method, and relates to the technical field of nuclear physical detection.During detection, eight EJ200 scintillators arranged in an array are used for energy deposition of gamma rays and fast neutrons and generating photons, and meanwhile three EJ426 thermal neutron scintillation screens are used for capturing thermal neutrons and generating photons; the response of gamma rays, fast neutrons and thermal neutrons is realized at the same time, and the detection precision is greatly improved. Meanwhile, if the three EJ426 thermal neutron scintillation screens are alternately stacked front and back, the total reflection of the EJ200 scintillators and the semi-light-proof performance of the EJ426 thermal neutron scintillation screens are utilized to block photon propagation in the X direction and only enable photons to be propagated in the Y direction and the Z direction, and each EJ200 scintillator corresponds to a four-channel photon collection structure to perform high-efficiency collection of the photons, so that the high-efficiency collection of the photons is realized. Therefore, high-precision detection and high-efficiency photon collection are realized, and support is provided for subsequent intense radiation field monitoring or high-precision positioning.

An electromagnetic wave detector includes a first ferroelectric layer, a two-dimensional material layer, a first electrode pair, and a second electrode pair. The first electrode pair includes a first electrode and a second electrode. The second electrode pair includes a third electrode and a fourth electrode. The first electrode pair and the second electrode pair are electrically connected to the two-dimensional material layer. The third electrode and the fourth electrode are disposed to face each other in a first direction perpendicular to a polarization direction of spontaneous polarization of the first ferroelectric layer. The first electrode and the second electrode are disposed to face each other in a second direction different from the first direction.

The invention provides a photon parallel matrix convolution operation chip which can be applied to the technical field of integrated photonics and optical calculation. The chip is integrated by a 1 * N array waveguide grating, a 1 * 2 beam splitter array, an input matrix modulator array, two N * 1 array waveguide gratings, two 1 * N beam splitters, a weight matrix modulator array, an M * M array waveguide grating detector array and a detector array. Main functional devices are integrated in a monolithic mode, the system is compact, the complexity and power consumption of the system can be effectively reduced, and the calculation efficiency is improved.

Some embodiments of this disclosure can improve measurement of target mark asymmetry in metrology apparatuses for improving accuracy in measurements performed in conjunction with lithographic processes. For example, a metrology system can include a projection system configured to receive a plurality of diffraction orders diffracted from a target on a substrate. The metrology system can further include a detector array and a waveguide device configured to transmit the plurality of diffraction orders between the projection system and the detector array. The detector array can be configured to detect each of the plurality of diffraction orders spatially separate from other ones of the plurality of diffraction orders.

The invention discloses a high-throughput multi-row parallel high-speed scanning high-resolution microscopic imaging device and method based on adaptive optics. A spatial light modulator is used for carrying out pixel-level regulation and control on a light beam phase to generate a strip-shaped light spot, and a special arrangement mode of a detector array is used for realizing a one-to-many relationship between a scanning line and an imaging line and realizing improvement of an imaging speed, a signal-to-noise ratio of an imaging result and a resolution ratio; a full-digital area array wavefront regulation and control method is utilized, a spatial light modulator is used for rapidly and dynamically compensating a laser wave surface according to imaging result feedback, the laser wave surface is free of distortion, and the influence of aberration on an imaging result is reduced; designing a double telecentric Fourier transform structure capable of simultaneously keeping rotational symmetry of object plane and image plane light beams, and realizing distortionless mapping of scanning light beam quality and a linear signal system; a switchable design of two scanning modes is developed, high-flux, high-resolution and high-speed light field scanning is realized, and the advantages of large visual field, high resolution and high frame rate imaging are achieved.

The invention discloses a complex metal product internal defect analysis method and system based on radiographic inspection, a spiral track scanning path is generated through a workpiece three-dimensional model, a six-axis cooperative mechanical arm is utilized to drive a miniature X-ray source to move along the path, and + / -5 [mu] m positioning compensation is realized in combination with a piezoelectric ceramic driving mechanism. And the detector array module is matched to carry out multi-mode ray scanning and real-time data acquisition. Collected data are transmitted to a real-time data processing module through an LVDS differential interface, an FDK algorithm is executed by a JetsonTX2 embedded GPU to complete tomographic image reconstruction, a 3D-ResNet neural network model is loaded through a TensorRT inference engine to achieve intelligent defect recognition, and finally a detection report is generated and uploaded to an MES system. The system comprises a ray generation module, a multi-degree-of-freedom mechanical arm bearing module and the like, a high-voltage generator circuit comprises a ZVS resonance circuit, and a motion control module adopts an FPGA + ARM dual-core architecture.

A computer tomography scanner (102) includes a radiation source (112) configured to emit x-ray radiation, a detector array (116) configured to detect x-ray radiation and generate a signal indicative thereof, and a reconstructor (118) configured to reconstruct the signal and generate sequential spares time line perfusion volumetric image data. The computer tomography scanner further includes a processor (132) configured to process the sequential spares time line perfusion volumetric image data using a trained neural network of a perfusion data enhancing module (136) to produce sequential dense time line perfusion volumetric image data.

The invention discloses an indoor positioning method based on optical AOA and ultrasonic auxiliary wave distance measurement, a plurality of groups of acousto-optic combined positioning systems are deployed in each indoor direction, each positioning system comprises an ultrasonic transmitter, an ultrasonic receiver, an LED array, a detector array and a microcontroller, and each microcontroller is connected to a terminal; the LED array performs frequency modulation on the optical signals, the ultrasonic transmitter performs pulse modulation on the ultrasonic signals, and the detector array receives the optical signals from the LED array, records the arrival angle when the optical signals arrive and corrects the arrival angle; the ultrasonic receiver receives the ultrasonic signal, and the distance R between the target point location and the ultrasonic receiver is determined by measuring and calculating the time difference of signal propagation; and the position of the target point location in the three-dimensional space is determined according to the corrected arrival angle and the distance R, a self-adaptive dynamic weighting hybrid filtering algorithm is operated, the space coordinate point location of the target point location is obtained, and indoor positioning of the target point location is achieved.

An electromagnetic wave detector includes a heat-absorbing layer, an insulating film, a two-dimensional material layer, and a first electrode portion. The heat-absorbing layer includes a thermoelectric material layer and a phase-transition material layer. The insulating film is disposed on part of the heat-absorbing layer. The two-dimensional material layer is disposed on the heat-absorbing layer and the insulating film and is electrically connected to the heat-absorbing layer. The first electrode portion is disposed on the insulating film and is electrically connected to the heat-absorbing layer with the two-dimensional material layer in between.

The invention belongs to the technical field of optical fiber sensing, and discloses a high-speed Fabry-Perot signal demodulation method and system based on a sparse spectrum. The method comprises the following steps: selecting a cavity length range of a Fabry-Perot cavity, and generating a cavity length sequence; repeating simulation to obtain reflection spectrums of the Fabry-Perot cavity under all cavity lengths in the cavity length sequence; adding noise to the reflection spectrum to obtain an analog acquisition spectrum; selecting a channel according to the output wavelength of the wavelength division multiplexer, obtaining a sparse spectrum, and constructing a data set; training the neural network model through the data of the data set; after training is completed, a reflection signal of the Fabry-Perot cavity is obtained through a wavelength division multiplexer and a photoelectric detector array and converted into a sparse spectrum; and inputting the obtained sparse spectrum into the neural network model to obtain the cavity length of the optical fiber Fabry-Perot sensor and realize Fabry-Perot signal demodulation. The demodulation rate and the monitoring efficiency of the optical fiber Fabry-Perot sensor are improved, and an efficient and reliable remote monitoring solution is provided for multiple fields.

A mosaic scan filter array has a plurality of identical tiles, each tile have n rows and m columns where n is equal to a greater than 1 and m is equal to a greater than 2. One row of tiles extends a width of a detector array and constitutes a base pattern. The base pattern is repeated M times and each repetition is laterally offset in one direction by one pixel width. The base pattern and laterally offset repetitions constitute a repeat pattern. There are MxN filters selected from the group of one or more of the following: RGBW filters, fluorescence emission filters and a series of narrow spectral band filters covering a continuous spectral range. The mosaic scan filter arrays can be used with a scanning microscope or a scanning camera.

The invention is suitable for the technical field of distance measurement, and provides a distance detection method and device for an underwater target, electronic equipment and a program product. The method is applied to a frequency-modulated continuous wave laser detection system, and a signal receiving end of the frequency-modulated continuous wave laser detection system comprises a two-dimensional matrix detector array composed of a plurality of single-photon avalanche photodiodes. The method comprises the following steps: transmitting a plurality of first laser signals with different frequencies to an underwater target through a signal transmitting end of a frequency-modulated continuous wave laser detection system; receiving second laser signals with different frequencies through a plurality of single-photon avalanche photodiodes; performing two-dimensional discrete synthesis processing on the second laser signals with different frequencies to obtain target echo signals; and determining the distance between the underwater target and the frequency-modulated continuous wave laser detection system according to the target echo signal. According to the frequency-modulated continuous wave laser detection system, a plurality of laser signals with different frequencies can be transmitted and received, so that the detection distance and the resolution ratio of an underwater target can be improved.

The invention provides a stratigraphic structure and ground pressure distribution detection method based on wave velocity tomography, and relates to the technical field of wave velocity tomography. The method comprises the following steps: firstly, arranging dense linear detector arrays in a monitoring area at an interval of 5m, and collecting the distribution condition of an aquifer, a lithology detection result and a drill core diagram of the monitoring area; recording seismic wave data, carrying out noise reduction processing on the seismic wave data, picking up arrival time, and associating the arrival time with a waveform event; performing path tracking on an observation result by adopting a wave velocity inversion algorithm, generating a wave velocity tomography image and substituting the wave velocity tomography image into the wave velocity-ground pressure evaluation model; and finally generating a ground pressure distribution diagram.

The invention relates to the technical field of stepping drive motor control, and discloses a stepping drive motor resonance control method and system for a high-precision scene, and the method comprises the steps: collecting motor operation data through a multi-dimensional detector array, and inputting a dynamic response model to obtain dynamic response features; extracting a current harmonic frequency spectrum key point as a resonance event mark point, aligning and matching a rotor angular displacement and winding temperature data fluctuation interval, and generating a mechanical response association pair; performing resonance event association and space-time positioning by using the association pair, and determining abnormal response distribution; and generating a self-adaptive suppression strategy based on the association pair and the abnormal distribution and triggering an execution device. The system comprises a multi-dimensional detector array, a dynamic response processing module, an event association analysis unit, an abnormal distribution modeling unit and a strategy execution unit. According to the invention, multi-physics field data fusion analysis and resonance precise control are realized, the method is suitable for high-precision scenes, and the motor operation stability and reliability are improved.

The invention relates to an Imaging sensor device in a stacked arrangement comprising:a pixel array tier comprising a plurality of pixel segments each having a plurality of pixels for photon detection each providing a digital pixel output;a processing tier comprising a number of processing cores each associated with one of the plurality of pixel segments to receive the pixel outputs of the pixels of the respective pixel segment, wherein the processing cores are each in bidirectional communication with one or more neighboring processing cores,wherein the processing cores are each configured to receive pixel outputs of the pixels of the associated pixel segments and to distribute processing of pixel outputs between the processing core and the at least one of the neighboring processing cores as neighboring processing cores.

A lidar system and method. Each emitter of the emitter array emits a light beam directed toward the FOV through the scanning unit. In one embodiment, an emission light beam guided according to an alternating energy level illumination protocol enables detection under halo, in which a first light beam emitted by a first emitter and having a first energy level illuminates a first FOV region, and a second light beam emitted by a second emitter and having a second energy level illuminates a second FOV region. And a second light beam emitted by the second emitter and having a second energy level irradiates a second FOV region adjacent to the first FOV region, wherein the first energy level is lower than the second energy level. In another embodiment, an emission light beam guided according to an offset illumination protocol enables detection under halo, where a first light beam emitted by a first emitter in a first plurality of scan lines illuminates the FOV portion at a first time and a second light beam emitted by a second emitter in a second plurality of scan lines at a second time. And a second light beam emitted by the second emitter in the second plurality of scan lines illuminates the FOV portion at a second time after the first time. Each detector of the detector array detects a reflection of the emitted light beam.

A LIDAR sensor for detecting at least one object in a field of view. The LIDAR sensor includes: a transmitting unit includes a laser source; and a receiving unit having at least one detector unit for receiving secondary light that has been reflected and / or scattered in the field of view by an object. The detector unit includes a sub-detector array including a plurality of sub-detectors arranged in a first direction of extent next to each other and / or in a second direction of extent one behind another, and a processor unit that is designed to select a first group from a plurality of sub-detectors and to group it to form a first macropixel, and simultaneously to select at least one second group and to group it / them to form at least one second micropixel. The first macropixel and at least one of the second macropixels comprise at least one same sub-detector.

The utility model relates to the field of wavefront detection, and provides a large-aperture light beam wavefront detection device which comprises a beam shrinking system which comprises a light beam receiving end lens group and a light beam transmitting end lens group, the light beam receiving end lens group comprises a plurality of receiving end lenses arranged in an array mode, and the light beam transmitting end lens group comprises a plurality of transmitting end lenses arranged in an array mode. The transmitting end lenses and the receiving end lenses are arranged in one-to-one correspondence; the micro-lens array comprises a plurality of micro-lenses which are arranged in an array mode, and the micro-lenses and the transmitting end lenses are arranged in a one-to-one correspondence mode; the detector array comprises a plurality of detectors arranged in an array mode, and the detectors and the micro lenses are arranged in a one-to-one correspondence mode. Therefore, the light beam receiving end lens, the light beam transmitting end lens, the micro lens and the detector are in one-to-one correspondence to form a wavefront detection unit, a wavefront detection unit array is further formed, and the problems that an existing wavefront detector for measuring large-aperture light beams is large in size and low in imaging resolution are solved.

The invention discloses an optical calculation error adjustment method and system, a medium and a program product, and relates to the technical field of optical calculation, and the method comprises the steps: determining a unified correction deviation value corresponding to the phase noise of an interferometer array; a target function based on a correction deviation direction variable is generated with the minimum difference sum of squares between a measured light intensity value of the photoelectric detector array and an ideal light intensity value as a target; solving the objective function to obtain the optimal value of the correction deviation direction variable of each phase shifter; and sending the correction deviation direction variable optimal value and the unified correction deviation value of each phase shifter to control equipment, so that the control equipment adjusts each phase shifter at the same time. In this way, collective adjustment of all the phase shifters can be realized through the determined unified correction deviation value and in combination with the correction deviation direction variable optimal value of each phase shifter, extra overhead caused by independent calibration is avoided, complexity of light calculation noise mitigation is reduced, a noise mitigation process is accelerated, and output precision of light calculation equipment is improved.