2678 results about "Light detection" patented technology

Disclosed herein is a sensor device for volumetric capnography. The sensor device is coupled to an adapter comprising a housing that encloses a measurement volume. The adapter is configured for gas flow along a first length axis, which aligns with a second length axis of the sensor device. The device includes an IR light source and an IR light detector, positioned on opposite sides of the housing. The IR light source emits IR light toward the detector across the measurement volume. The sensor device also includes a first ultrasonic transceiver in contact with the adapter and configured to emit ultrasound centered at a first position along the second length axis, directed partly along the axis and partly transversely. A second ultrasonic transceiver, also in contact with the adapter, emits ultrasound centered at a second position along the second length axis, directed partly opposite to the first direction and partly transversely.

The invention discloses a multi-mode end point detection system and method for a semiconductor dry process, and relates to the field of gas concentration detection. A gas absorption cell; the reference light path adjusting unit comprises an adjustable attenuator used for adjusting signals; the first photoelectric detector is used for detecting a transmission signal; the second photoelectric detector is used for detecting a reference signal; the lateral scattered light detector is used for detecting a scattered signal of the particulate matters in the gas absorption tank; and the signal processing unit is in signal connection with the first photoelectric detector, the second photoelectric detector and the lateral scattering light detector and is used for performing compensation calculation on the transmission signal based on the reference signal and the scattering signal so as to obtain a corrected gas absorption signal. By adopting the scheme, measurement signal distortion caused by optical mirror surface pollution and particulate matter scattering interference in a semiconductor tail gas optical detection technology is avoided.

The invention provides a road surface defect detection method and system based on multi-sensor fusion, and the method comprises the steps: 1, capturing a road surface image through an RGB camera, and obtaining the three-dimensional point cloud data of a road surface through LiDAR; 2, performing feature extraction on the road surface image captured by the RGB camera by using a YOLOv5 network; step 3, processing the road surface three-dimensional point cloud data acquired by the LiDAR by using a Point Net + + network; step 4, carrying out deep fusion on the image features extracted by the YOLOv5 and the point cloud features extracted by the Point Net + +; and 5, detecting and classifying the road surface defects by adopting a quantitative and qualitative combined method. According to the method, an RGB camera and LiDAR (light detection and distance measurement) are adopted, a YOLOv5 network is combined with PointNet + +, high-precision and real-time detection and classification of road surface defects are achieved, and the defects of a traditional method are overcome.

The invention relates to the technical field of display, and particularly discloses an intelligent self-adaptive eye protection display system which sequentially comprises a content analysis module, an ambient light detection module, an eye protection parameter calculation module, a display parameter adjustment module and a user feedback module. The system identifies the screen content type and the dynamic degree in real time, synchronously detects the ambient light intensity and the color temperature, obtains the optimal combination of the blue light proportion, the brightness, the contrast ratio, the color temperature and the sharpness through a multi-target optimization model, and smoothly adjusts the display through driving; a user can score, finely adjust and mark a scene, and feedback data enters a self-learning engine to iteratively update a parameter weight so as to form a content-environment-user closed loop. The system can significantly reduce blue light harm and improve visual comfort without external hardware.

The invention discloses an ultra-weak light detection system and method based on an SPAD array and time correlation photon counting, and belongs to the technical field of ultra-weak light detection. A multi-channel SPAD array detection unit; a time-to-digital conversion module; the photon arrival time analysis unit comprises a TCSPC model, a noise modeling and suppression module and a self-adaptive convolution filter; a data compression and fitting module; a spatial denoising filter; an output unit; and a master control processing unit. Based on a multi-channel SPAD array detection unit, a time-to-digital conversion module, a TCSPC model, a noise modeling and suppression module, a self-adaptive convolution filter and the like, high-sensitivity imaging and quantitative detection of materials (such as black silicon) with extremely low reflectivity are realized. The system has the advantages of being good in real-time performance, high in time resolution, high in signal-to-noise ratio, high in on-chip processing capacity, high in integration and the like, and meanwhile the bottleneck of a traditional TCSPC method for large-scale photon data processing is solved.

The invention belongs to the technical field of laser flatness testing, and particularly relates to a modularized box room installation flatness testing device which comprises a fixed frame and a laser detector located in the fixed frame, and further comprises a moving mechanism arranged on the inner side wall of the fixed frame, and the laser detector is arranged on the moving mechanism. The motor is used for driving the laser detector to move multidirectionally; the first electric push rod is fixedly arranged at the bottom of the moving mechanism, a mounting plate is fixedly arranged at the moving end of the first electric push rod, and the laser detector is fixedly mounted on the lower surface of the mounting plate. Through multi-dimensional innovation of optical protection, a self-adaptive mechanical structure, intelligent environment control, automatic marking and the like, the precision and efficiency of modular box room installation flatness detection are remarkably improved, and manual dependence and environment interference are reduced through intelligent design.

A system for automatically adjusting the lighting parameters of a space is disclosed herein. The control module sets the target lighting parameters in the space and drive the smart lamp groups to illuminate by using the preset light recipe and to control the smart lamp groups to perform the illumination. The control module compares an ambient light detection value in the actual environment with the target value. When the ambient light detection value is not the same as the target value, the control module drives the ambient light sensor module performs a dimming procedure to the smart lamp groups. Wherein, the dimming procedure includes the step of adjusting an illuminance uniformity of the space according to the actual illuminance detected by the ambient light sensor module. After the calculation of the illuminance uniformity formula, the illuminance uniformity is adjusted to be the same as a target illuminance uniformity.

The invention relates to the technical field of monitoring light supplement adjustment, and discloses a monitoring light supplement automatic adjustment system based on ambient light detection. An ambient light dynamic sensing module of the system captures visible light and infrared spectrum components of a monitoring area in real time through a multispectral sensor array, constructs a light intensity distribution model in combination with illumination intensity historical data, and outputs a theoretical illumination distribution diagram; the spectral feature analysis module compares the theoretical distribution map with the actually measured light field data in a multi-dimensional manner, performs spectral deviation detection and generates a spectral difference feature tensor; the light supplement demand mapping module inputs the tensor into a space illumination analysis network, and generates a light supplement coverage demand thermodynamic diagram and calibrates the boundary of a low-illumination area in combination with a field angle of monitoring equipment and position coordinates of a light supplement lamp; and the self-adaptive light supplement strategy execution module starts a multi-band mixed light supplement mode for a high-demand area according to the thermodynamic diagram, and performs phase cooperative control on adjacent light supplement lamp groups. The system realizes dynamic and accurate adjustment of light supplement, and can effectively adapt to complex ambient light changes.

The invention provides a scoliosis screening method and system, and relates to the technical field of medical artificial intelligence, human body image data on a low-light detection garment worn by a patient is collected, the human body image data is preprocessed and sent to an SSD module, the SSD module is used for predicting the position of a low-light light source, and a scoliosis detection result is obtained. The key point detection module is used for detecting human body scoliosis, high-precision detection frame information in the detection result is used as a basis, a human body posture result predicted by the key point detection module is restrained and corrected, then human body scoliosis grading is performed, a human body scoliosis detection result is displayed and fed back to a patient, high-precision detection of scoliosis is achieved, and the system has the advantages of high efficiency, non-invasiveness and light weight; the scoliosis early detection rate and grading intervention precision can be remarkably improved, and the problems that traditional medical diagnosis is low in efficiency, large in radiation risk, insufficient in precision and difficult to operate on embedded equipment with limited resources are solved.

The invention discloses a perfluorohexanone fire extinguishing agent fire extinguishing method and system applied to a power switch cabinet fire, and belongs to the technical field of power system energy storage equipment.The method comprises the steps that an arc light signal is detected through an arc light detection device, and a partial discharge signal is detected through an ultrasonic partial discharge detection device; meanwhile, temperature data and smoke concentration data in the cabinet are detected through a temperature and smoke detection device; signal fusion is executed, and a comprehensive fire hazard grade judgment value is generated; comparing the comprehensive fire hazard grade judgment value with a preset fire hazard grade threshold value, and judging the fire hazard grade; and the release mechanism is controlled to release the perfluorohexanone fire extinguishing agent. According to the invention, through multi-signal fusion and a physical power model, the fire stage is dynamically discriminated, the dosage of the perfluorohexanone is adaptively controlled, the fire extinguishing accuracy and efficiency are improved, the false alarm rate is reduced, and data recording and intelligent management are supported.

A light detection apparatus according to an embodiment of the present disclosure includes a semiconductor substrate, a light receiver, a trench, a multiplier that is a first electrically-conductive type, and a contactor. The semiconductor substrate has a first surface and a second surface facing each other, and has a pixel array in which a plurality of pixels is disposed into an array shape in an in-plane direction. The light receiver is provided inside the semiconductor substrate for each of the pixels, and generates, through photoelectric conversion, carriers in accordance with an amount of light received. The trench is provided, for each of the pixels, to the first surface of the semiconductor substrate. The multiplier that is the first electrically-conductive type is provided to a bottom surface of the trench, and allows the carriers generated in the light receiver to undergo avalanche multiplication. The contactor includes an electrically-conductive material buried in the trench, and is in contact with the multiplier.

The invention discloses an on-line light detection device for coated glass production, and relates to the technical field of glass detection, the on-line light detection device comprises a first conveying roller group and a second conveying roller group which are used for transversely conveying coated glass, and an interval exists between the first conveying roller group and the second conveying roller group; the lifting adjusting assembly is arranged at the interval, is close to the first conveying roller group, is used for adsorbing the coated glass from the first conveying roller group and can perform lifting motion; the deviation rectifying and centering assembly is arranged at the interval, is close to the second conveying roller set and is used for driving the coated glass adsorbed by the lifting and adjusting assembly to rotate and longitudinally move, and deviation rectifying and centering of the coated glass are achieved in the process; the light detection assembly is arranged above the adsorption area of the lifting adjustment assembly, and the follow-up detection precision can be improved conveniently by conducting flexible position adjustment on the coated glass in advance.

A light detection and ranging (LIDAR) system for a vehicle can include: a light source configured to output a transmit beam at a first orientation; a reflective surface configured to redirect the transmit beam from the first orientation to a second orientation; and a lens interface configured to receive the transmit beam at the first orientation and focus the transmit beam onto the reflective surface; wherein the LIDAR system emits the transmit beam at the second orientation into an environment of the LIDAR system.

An optical frequency domain reflectometer with environmental disturbance resistance and large strain measurement capability belongs to the field of distributed optical fiber sensing and comprises an opposite sweep frequency light frequency modulation continuous wave signal generation module, a light splitting device, a modulation device, a circulator, a polarization controller, an optical coupling device, a photoelectric conversion module and a data acquisition and processing module. An optical signal generated by an opposite sweep frequency light frequency modulation continuous wave signal generation module is divided into probe light and local oscillation light through a light splitting device, the probe light is modulated through a modulation device and sent to an optical fiber through a circulator, and a Rayleigh back scattering light signal generated by the optical fiber and the local oscillation light interfere in an optical coupling device to obtain interference light; the photoelectric conversion module mixes beat frequency signals of interference light, and the data acquisition and processing module analyzes and processes the beat frequency signals. According to the invention, the position information of the Rayleigh backscattering point is marked by using the modulated probe light, the Rayleigh scattering signal at the corresponding position is restored, crosstalk between channels is inhibited, and high-precision measurement in a large dynamic range and resistant to environmental disturbance is realized.

The invention relates to the technical field of optical communication, in particular to an automobile headlamp communication system and method based on image frame interpolation, comprising a transmitting end and a receiving end, a vehicle-mounted central control system of the transmitting end is used for receiving input to-be-transmitted information, and an ambient light detection module evaluates an external illumination condition in response to the input of the to-be-transmitted information; an image gray value and frame insertion frequency are set based on the illumination intensity, the image coding module codes information to be transmitted based on the set image gray value to generate a projection image frame, and the projection module inserts the projection image frame into a normal illumination frame sequence of a vehicle lamp based on the frame insertion frequency and projects the projection image frame to an external environment; the image acquisition module of the receiving end is used for acquiring a projection image frame, the image decoding module preprocesses the projection image frame and then decodes the projection image frame, and the information to be transmitted is restored and sent to the vehicle-mounted central control system. According to the invention, vehicle lamp communication at a certain distance in a traffic environment can be realized on the premise of ensuring normal vehicle lamp illumination.

The utility model relates to the technical field of detection equipment, and provides multi-spectral detection equipment for defects in industrial places, which comprises a three-axis cradle head bracket, the detector outer shell is rotationally connected with the three-axis holder bracket, and the position adjustment of the detector outer shell is controlled by the three-axis holder bracket; the visible light lens I, the visible light lens II, the infrared lens and the ultraviolet lens are mounted on the detector outer shell, and lenses of the four lenses are positioned on the same side surface of the detector outer shell; and the visible light lens I, the visible light lens II, the infrared lens and the ultraviolet lens are distributed in a crossed manner. According to the technical scheme, visible light pictures and infrared or ultraviolet pictures under the same field angle can be collected, the four lenses are distributed in a crossed mode, coordinate transformation of the pictures can be achieved conveniently, information result fusion of visible light detection and infrared or ultraviolet detection is achieved, and the detection accuracy is improved. And the detection accuracy and reliability of industrial place defects and the like can be improved.

An embodiment method of generating a local map for travel control of a mobility includes loading the local map from an entire map stored in a memory, wherein the local map includes at least a portion of the entire map, acquiring a two-dimensional (2D) light detection and ranging (LiDAR) point data from a LiDAR mounted on the mobility, acquiring a three-dimensional (3D) feature point data by receiving a front image of the mobility from a camera mounted on the mobility, reducing a dimension of the 3D feature point data to a 2D feature point data, binding the 2D feature point data to the 2D LiDAR point data, and publishing the 2D feature point data bound to the 2D LiDAR point data on the local map.

The invention discloses a quantum magnetometer device based on a diamond nitrogen-vacancy color center. The quantum magnetometer device comprises a laser emission unit used for generating a 532nm laser beam based on a laser trigger signal; the beam shaping unit is used for focusing the laser beam to the diamond sample; the diamond sample comprises an NV color center array with specific depth on the surface or in the diamond sample, and electrons in NV color centers are excited based on laser beams to transition and generate fluorescence; the fluorescence collection unit is used for separating exciting light from 650-800nm fluorescence signals and converting the fluorescence signals into multi-channel electric signals; the microwave radiation unit is distributed around a diamond sample space and emits three independently regulated microwave frequencies at the same time; and the control and processing unit is used for receiving and processing the multi-channel electric signals in real time and analyzing magnetic field parameters based on the optical detection magnetic resonance spectral line. Synchronous measurement of a three-dimensional magnetic field is realized, and the limitation of single-axis measurement of a traditional NV magnetometer is broken through.

The invention discloses a switch cabinet electric arc light detection method and system based on multispectral fusion, and relates to the technical field of electric power system intelligent detection, and the method comprises the following steps: S1, building a cross-spectrum unified time reference, and carrying out the synchronous comparison of an infrared light signal, a visible light signal and an ultraviolet light signal, extracting a temperature transition trigger feature and a strong light disturbance spectrum feature, and generating a time synchronization deviation vector; and S2, constructing an anti-fact spectrum playback model based on the time synchronization deviation vector, generating a shadow spectrum sequence, positioning an infrared response threshold lifting reason through energy difference analysis, calculating a spectrum overlapping risk interval and duration, and outputting a threshold disturbance distribution diagram. According to the method, infrared anomalies are identified through cross-spectrum time alignment, anti-fact playback and differential analysis, channel recovery is guided in combination with springback prediction and time sequence correction, and a spectrum broken chain window is constructed through dislocation sampling and phase regulation and control, so that the accuracy and the anti-interference capability of arc identification are effectively improved.

The invention provides a parameter correction method and system for tunnel dynamic lighting environment simulation, and relates to the technical field of tunnel lighting detection. The method comprises the following steps: collecting tunnel pavement optical data, lamp operation state data, external daytime brightness data, traffic parameter data and environmental parameter data; estimating an initial parameter set based on the data and a preset scattering / reflection model; obtaining and normalizing an actual measurement illumination field according to the measurement geometry and spectral response; constructing a tunnel three-dimensional illumination simulation model, and generating a simulated illumination field; and comparing the corrected illumination field with the simulated illumination field, calculating a difference index and iteratively optimizing parameters until the difference converges, and obtaining a final corrected parameter set. According to the invention, the accuracy, adaptability and energy efficiency level of tunnel lighting simulation and regulation are improved.

A method of scanning a field of view implemented by a Light Detection and Ranging (LIDAR) system includes transmitting pulsed light into the field of view; receiving, by a photodetector array, light from the field of view, wherein the photodetector array is configured to receive the light from objects in the field of view corresponding to ambient light and the pulsed light reflected therefrom; generating, by the photodetector array, DC signal components exclusively attributed to receiving the ambient light and AC signal components exclusively attributed to receiving the pulsed light; separating, by a processing circuit, the DC signal components from the AC signal components; generating, by the processing circuit, a two-dimensional image that represents an ambient light image of the field of view from the DC signal components; and generating, by the processing circuit, a three-dimensional image of the field of view from the AC signal components.

The invention provides a light source multiplexing diamond NV color center wide field detection system and an illumination detection method. The system comprises a diamond containing an NV color center, an exciting light module, a first double-color sheet, an objective lens, a second double-color sheet, a wide field imaging module, an illumination imaging module and a microwave module, exciting light generated by the exciting light module irradiates the first double-color piece, is guided to the objective lens, and irradiates the diamond after being transmitted by the objective lens so as to excite the NV color center of the diamond to generate fluorescent light; the objective lens is of an infinity type; the exciting light is irradiated to a sample to be detected after being transmitted by the diamond; fluorescent light and exciting light from a sample to be detected are collected by the objective lens, then transmitted to the first double-color piece and guided to the second double-color piece through the first double-color piece, the second double-color piece guides the fluorescent light to the wide-field imaging module for imaging, and the exciting light in the second double-color piece is guided to the illumination imaging module for imaging. Illumination can be achieved in the exciting light working state, exciting light switching operation in the prior art is avoided, and efficiency can be remarkably improved.

The invention discloses a magnetic sensor, a sensing measurement system and a magnetic field measurement method, and relates to the technical field of magnetic field measurement, the magnetic sensor comprises an excitation light source, a light path collection assembly, a fluorescence detector and a shielding shell, and the excitation light source, the light path collection assembly and the fluorescence detector are fixedly arranged in the shielding shell in sequence; the light path collection assembly comprises an NV color center diamond, a magnetic field bias module and a fluorescence convergence assembly, the magnetic field bias module can provide a bias magnetic field for the NV color center diamond, the NV color center diamond can emit fluorescence under the action of the exciting light and the bias magnetic field, and the fluorescence convergence assembly can converge the fluorescence emitted by the NV color center diamond to collect the fluorescence emitted by the NV color center diamond. The fluorescence detector can receive the fluorescence converged by the fluorescence convergence assembly, and can transmit a light current signal obtained by detecting the fluorescence to the signal acquisition system; according to the invention, volume miniaturization can be realized conveniently, scene adaptability, anti-interference capability, precision stability and reliability are improved, and use cost is reduced.

The embodiment of the invention discloses a scanning NV probe microscope which comprises an atomic force microscopy system used for detecting surface topography information of a sample and an optical detection magnetic resonance system used for detecting surface magnetic field distribution information of the sample, and the atomic force microscopy system comprises a vibration arm and a diamond probe. The optical detection magnetic resonance system comprises an NV color center, a transition excitation light path and a fluorescence detection light path; a sample to be scanned and the transition excitation light path are respectively positioned on two opposite sides of the diamond probe, and the transition excitation light path and the fluorescence detection light path are positioned on the same side of the diamond probe; a first metal coating film is arranged on one side, close to the sample, of the diamond probe and is used for blocking surface fluorescence of the sample. According to the scanning NV probe microscope provided by the embodiment of the invention, the metal coating is arranged at the bottom of the diamond probe to block stray fluorescence from the surface of the sample, so that the problems of low magnetic field imaging signal-to-noise ratio and limited measurement precision of the existing scanning NV probe microscope are solved.

The invention discloses a chip packaging body defect detection method, and relates to the field of chip detection.The chip packaging body defect detection method comprises the steps that a feeding position, a visible light detection position, a material connection position, an infrared light detection position and a discharging position are arranged on a rack side by side; the first conveying module lifts the carrier plate at the visible light detection position so that the scanning head can carry out line scanning imaging on the carrier plate units, the second conveying module lifts the carrier plate at the infrared light detection position so that the infrared system can carry out imaging, and physical separation and process relay of visible light and infrared detection are achieved. On the basis, position offset and surface defects are obtained based on visible light images of the carrier plate units, internal subfissures are recognized in combination with infrared images of the chip bodies, and unit-level judgment is generated by integrating multi-source results, so that the efficiency bottleneck of a traditional start-stop mode is avoided, and the coverage blind area of single-mode detection is overcome; and the takt, the integrity and the accuracy of chip packaging body defect detection under a high-productivity production line are remarkably improved.

This light detection device comprises: a first chip and a second chip that are laminated so as to be electrically connected to each other; a pixel array that is provided to the first chip and includes a plurality of pixels each including a photoelectric conversion unit; and a circuit unit that is provided to the second chip and is electrically connected to the pixel array of the first chip. The plurality of pixels include imaging pixels for detecting visible light and ranging pixels for detecting ranging light. The pixel array includes an imaging pixel array including a plurality of imaging pixels arranged at least in the column direction, and a ranging pixel array including a plurality of ranging pixels arranged at least in the column direction. The circuit unit includes an imaging circuit electrically connected to the imaging pixel array, and a ranging circuit electrically connected to the ranging pixel array.

A display device including: a first light-emitting opening, a second light-emitting opening, a third light-emitting opening, and a light-receiving opening; wherein a first color emission area corresponds to the first light-emitting opening; a second color emission area corresponds to the second light-emitting opening; a third color emission area corresponds to the third light-emitting opening; and a light detection area corresponds to the light-receiving opening; and when the first color emission area, the second color emission area, and the third color emission area are viewed at a first point having a first viewing angle with respect to a normal line of a base layer, a sensing electrode shields each of two emission areas among the first color emission area, the second color emission area, and the third color emission area or one of the first color emission area, the second color emission area, and the third color emission area.

The invention relates to the technical field of information processing, in particular to the technical field of optical detection, and particularly relates to a two-dimensional material layer number identification method and equipment. A photoelectron chip composed of a semiconductor light source, a 2 * 2 waveguide beam splitter, a grating coupler, an on-chip spectrometer, a super lens and an optical detector is compact in structure and low in cost; a semiconductor light source emits an optical signal, the optical signal sequentially passes through a 2 * 2 waveguide beam splitter, a grating coupler and a super lens and then irradiates a two-dimensional material sample, a displacement table is used for carrying out accurate Z-axis focusing and XY plane scanning, reflection spectrum signals are collected in real time, spectrum characteristics are analyzed through an upper computer to determine layer number information, and finally a layer number distribution diagram is generated. According to the method, rapid, automatic and high-precision identification of the number of layers of the two-dimensional material is realized, and large-range scanning detection is facilitated.

The invention belongs to the technical field of visible light detection, and aims to realize accurate detection of multicolor visible light and monolithic integration of a multi-wavelength receiver. The invention provides a fully-integrated multicolor visible light detector based on a sub-wavelength polycrystalline silicon grating, which comprises three detectors capable of selectively detecting blue, green and red signals respectively. The principle is as follows: a one-dimensional sub-wavelength polycrystalline silicon grating in the multicolor detector is embedded in an upper SiO2 layer and a lower shallow trench isolation region to form a dielectric waveguide structure of which the middle is a high-refractive-index medium and the periphery is a low-refractive-index oxide layer. The period and the grating width of the sub-wavelength grating are changed, so that the incident polarized light and the sub-wavelength periodic structure are strongly coupled to cause a guided-mode resonance effect, and the sub-wavelength grating can be applied to a transmission optical filter. The size and the cost of the multicolor visible light communication system can be effectively reduced, and the data transmission rate of the system is greatly improved.

Laser-scanning systems for augmented reality glasses displays and LiDAR (light detection and ranging) use photonic integrated circuits to generate multiple collimated (or low-divergence) modulated laser beams. Laser light is guided on the photonic chip, expanded, and emitted from the surface of the chip (using grating coupler devices) as one or more large-diameter (e.g., millimeter-scale), collimated or low-divergence beams. These gratings may be integrated onto movable microelectromechanical systems (MEMS) plates to steer the beam along two angular axes. Alternatively, the beam(s) from the grating(s) may be steered by a separate MEMS mirror integrated onto the photonic chip or on another chip. Such systems enable multi-beam laser scanning systems without collimation lenses, reducing the size and packaging complexity of high-performance laser scanning systems for augmented reality glasses and LiDAR.