3807 results about "Light detection" patented technology

An agricultural vehicle may include a propulsion system, a steering system, and a vehicle controller. An agricultural vehicle may include a camera sensor having a camera field of view (CFOV), a light detection and ranging (LiDAR) sensor having a LiDAR field of view (LFOV), and an imaging controller in operable communication with the camera sensor and the LiDAR sensor. The imaging controller may include a processor and at least one non-transitory computer-readable storage medium having instructions store thereon that, when executed by the at least one processor cause the imaging controller to, at least, receive image data, segment the image data, fuse LiDAR data and the image data, create a fused instance including depth information; and provide at least the fused instance to the vehicle controller, wherein the vehicle controller is configured to provide at least one navigational command based at least partially on the fused instance.

To solve the problem in which: electric charges generated by a tunnel effect increase in proportion to the area of a region where the electric charges are detected; and when the area of the region where the electric charges are detected is reduced, light detection efficiency may be reduced.SOLUTION: The magnitude of the potential of a fourth semiconductor region is lower than the magnitude of the potential of a portion between the fourth semiconductor region and a third semiconductor region, and the difference between the magnitude of the potential of a first semiconductor region and the magnitude of the potential of a second semiconductor region is larger than the difference between the magnitude of the potential of the fourth semiconductor region and the magnitude of the potential of the portion between the fourth semiconductor region and the third semiconductor region. The magnitude of the potential of the third semiconductor region is lower than the magnitude of the potential of the fourth semiconductor region, and the difference between the magnitude of the potential of the first semiconductor region and the magnitude of the potential of the third semiconductor region is larger than the difference between the magnitude of the potential of the second semiconductor region and the magnitude of the potential of the fourth semiconductor region.SELECTED DRAWING: Figure 1

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 discloses a wiring auxiliary structure of a screen FPC end and a screen lightening detection process, the structure comprises an epitaxial bearing platform, a base, a wiring platform, a needle die, a pressing module, a jacking module and a beating and aligning assembly, the pressing module comprises a pressing die strip and a power device, the needle die and the wiring platform are in butt joint to form a stepped matching surface, and the needle die is also provided with an air leakage channel. On one hand, the FPC end is flattened on the basis of negative pressure adsorption force formed by the downward pressing die strip in combination with movement in the up-down and front-back directions, meanwhile, position calibration of the flattened FPC end is conducted on the basis of left-right patting, and under the matched pressing fit of a matching face and the screen FPC end, accurate butt joint of an interface and a needle die is achieved, the butt joint dislocation rate is reduced, and potential safety hazards are eliminated; and on the other hand, the air flow formed by lamination is discharged based on the air leakage channel, lamination hollowing is avoided, the butt joint stability of the interface and the needle mold is improved, the displacement rate of the interface and the needle mold is reduced, and therefore the accuracy rate of the screen lightening test is improved.

Aspects of the present disclosure include methods for spectrally resolving light from fluorophores in a sample. Methods according to certain embodiments include detecting light with a light detection system from a sample having a plurality of fluorophores having overlapping fluorescence spectra and spectrally resolving light from each fluorophore in the sample with a generalized least squares algorithm. In some embodiments, methods include estimating the abundance of one or more of the fluorophores in the sample, such as on a particle. In certain instances, methods include identifying the particle in the sample based on the abundance of each fluorophore and sorting the particle. Methods according to some embodiments includes spectrally resolving the light from each fluorophore by calculating a spectral unmixing matrix for the fluorescence spectra of each fluorophore. Systems and integrated circuit devices (e.g., a field programmable gate array) for practicing the subject methods are also provided.

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 relates to the technical field of optical nondestructive testing equipment for the sealing performance of a blueberry bottle opening, in particular to an optical nondestructive testing device and method for the sealing performance of the blueberry bottle opening. According to the technical scheme, the optical nondestructive testing device for the sealing performance of the blueberry bottle opening comprises an optical testing device, mounting grooves, a lead screw, a mounting support, a mounting ring, a Fresnel lens, a micrometer caliper, a double-color laser line light source and a rotating motor, and the mounting grooves are formed in the two sides of the interior of the optical testing device; compared with a traditional optical nondestructive testing device for the sealing performance of the blueberry bottle opening, a single light source or a simple lens group is mostly adopted, a 360-degree annular area of the bottle opening is difficult to cover, illumination on the edge of the bottle opening or a complex curved surface area is insufficient, and tiny defects are prone to being omitted; according to the optical nondestructive testing device for the sealing performance of the blueberry bottle opening, the double-color laser line light source is matched with the Fresnel lens array, multispectral reflection data are synchronously collected, the surface micro-mark contrast is enhanced by utilizing wavelength difference, and the monochromatic light detection sensitivity is effectively improved.

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 method is provided for beam management. The method includes obtaining, by a Light Detection and Radar (LiDAR) sensor having one or more LiDAR cameras performing ray-tracing, out-of-band infrared measurements of a surrounding environment. The method further includes selecting, by a base station, a transmission and reception beam pair for use in the surrounding environment from a plurality of available transmission and reception beam pairs responsive to the out-of-band measurements of the surrounding environment.

The invention discloses a camera zoom control system and method based on an optical zoom technology, and relates to the field of camera zoom control, and the system comprises a zoom instruction receiving module, a lens parameter calculation module, a drive control module, a lens movement module, an image quality evaluation module, an ambient light detection module, an anti-shake compensation module and an intelligent learning module. The receiving module receives a zooming instruction of a user to obtain a target focal length. The calculation module calculates a focal length variation and a lens moving distance. The driving module generates a signal to control the lens to move. The lens module moves to realize zooming. The evaluation module evaluates the image quality. The detection module detects the light intensity of a shooting environment. The learning module collects a data learning algorithm to establish a mapping model. According to the invention, the zoom precision and the shooting quality are improved, the influence of light on precise zoom is considered, the anti-shake function reduces shake interference, the image quality is comprehensively evaluated, the high-precision motor ensures accurate mirror moving, the zoom effect is optimized through closed-loop control and intelligent learning, and personalized services are provided.

A system for emulating an over-the-air environment for testing a Frequency-modulated Continuous Wave (FMCW) light detection and ranging (LiDAR) unit under test (UUT). The system includes an optical lens system that receives an FMCW laser signal from the LiDAR UUT, and provides the signals to one or more optical fibers. A slope, chirp timing and intensity of the FMCW laser signal is determined using digital signal processing, and a modulation waveform is determined to emulate an over-the-air (OTA) environment based at least in part on the slope, chirp timing, and intensity. An in-phase quadrature phase (IQ) modulator modulates the FMCW laser signal using the modulation waveform and provides the modulated laser signal back through the optical lens system to the LiDAR UUT.

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.

Proposed is a multi-sensor fusion device for performing extrinsic calibration in real time. The multi-sensor fusion device may include a camera unit including at least one camera and configured to produce image information of a surrounding environment by using the camera. The multi-sensor fusion device may also include a light detection and ranging (LiDAR) unit including at least one LiDAR and configured to produce a point cloud of the surrounding environment by using the LiDAR; a data combination unit configured to produce combined data in which the image information is combined with the point cloud. The multi-sensor fusion device may further include a data computation unit configured to derive an extrinsic calibration parameter by inputting the combined data into an extrinsic calibration model and perform extrinsic calibration of the camera and the LiDAR based on the derived extrinsic calibration parameter.

The invention relates to the technical field of molecular optoelectronic devices, and particularly discloses a chiral molecule, a chiral molecule device, a preparation method and circularly polarized light detection application. Wherein the chiral molecule is a functional molecule which contains a chiral center and has a D-A-D structure type, and the chiral molecule device comprises a silicon substrate, an aluminum oxide dielectric layer, a metal electrode, a graphene point electrode and an RE-PDI molecule and is applied to circular polarized light detection. The invention designs and synthesizes a functional molecule RE-PDI which contains a chiral center and has a D-A-D structure type, and the functional molecule RE-PDI is assembled between graphene point electrodes with nano gaps through a chemical decoupling method. By using the distinguishing response of RE-PDI molecules to different types of circularly polarized light, distinguishing detection and dynamic periodic adjustable response to left-handed and right-handed circularly polarized light can be stably realized.

Provided is a light detection device that suppresses light interference. The light detection device includes: a semiconductor layer having a photoelectric conversion unit; a first insulating film layered on a light incidence surface side of the semiconductor layer; an optical element having a metal film layered on the first insulating film and an opening array formed in a region, of the metal film, that overlaps with the photoelectric conversion unit in plan view, the optical element being capable of selecting a specific light; a second insulating film layered on the optical element; and a third insulating film layered on the second insulating film. One of a surface of the metal film on the second insulating film side thereof or a surface of the second insulating film on the third insulating film side thereof has unevenness that is greater than unevenness in a surface of the metal film on the first insulating film side thereof or a surface of the first insulating film on the semiconductor layer side thereof.

Systems and techniques are provided for synchronizing sensor operations. An example method includes determining a scanning frequency of a light detection and ranging (LIDAR) sensor configured to collect data for regions of space during each scan cycle; selecting an exposure from an exposure sequence generated based on data captured by a time-of-flight (TOF) sensor to align with data from a scan from the LIDAR sensor during a scan cycle; based on the scanning frequency, a field-of-view (FOV) of the LIDAR sensor, a FOV of the TOF sensor, a location of the exposure within the exposure sequence, and / or sensor internal delays, determining a timeframe between a reference time and an alignment time during the scan cycle when the FOVs of the LIDAR sensor and the TOF sensor are aligned; and based on the timeframe, determining a time offset for triggering the TOF sensor to capture data associated with the exposure sequence.

A light detection and ranging (LIDAR) system includes a transmitter, a first receiver, a second receiver, and one or more processors. The transmitter is configured to output a transmit beam. The first receiver is positioned on a first side of the transmitter and is configured to receive a first component of a return beam from reflection of the transmit beam by an object. The second receiver is positioned on a second side of the transmitter and is configured to receive a second component of the return beam. The one or more processors are configured to determine at least one of a range to the object or a velocity of the object and control operation of the autonomous vehicle based on the at least one of the range or the velocity.

The invention relates to the technical field of electronic equipment detection, in particular to a multi-dimensional anti-candid photographing detector and a detection method thereof. The system comprises a processing unit, a thermal imaging module, an electromagnetic radiation detection module and a wireless security module, wherein the wireless security module comprises at least two wireless network interface cards, and a first wireless network card is used for connecting a specified internal network and scanning and analyzing internal network equipment; the second wireless network card works in a monitoring mode and is used for sniffing all surrounding Wi-Fi signals, Bluetooth signals and associated equipment thereof and performing data packet analysis; the user interaction module, the positioning auxiliary module, the storage unit and the power supply module are used for providing electric energy for the detector. According to the invention, four technical dimensions of thermal imaging, wireless safety detection, infrared light detection and electromagnetic radiation detection are fused, and an intelligent analysis and positioning algorithm is combined, so that the comprehensiveness, the accuracy and the efficiency of detecting candid equipment are improved, and clear positioning guidance and comprehensive safety evaluation are provided for a user.

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.

Provided in the embodiments of the present disclosure are a display apparatus, and an ambient light detection method therefor. The display apparatus comprises a first substrate and a first detection module, wherein the first substrate comprises a display area (AA) and a border area located outside the display area (AA), the first substrate comprises a first base and a photosensitive thin-film transistor (100), the photosensitive thin-film transistor (100) is located in the border area, and the photosensitive thin-film transistor (100) is provided with a first voltage signal and receives ambient light irradiation; and the first detection module can detect a first leakage current generated by the photosensitive thin-film transistor (100) and determine an ambient light color temperature and / or ambient light intensity on the basis of the first leakage current. An ambient light detection function is integrated into the display apparatus, which facilitates making a product more lightweight and thin, and reduces the cost.

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.

An optical device may include an infrared detection unit that detects heat generated at a weldment during welding, a visible light detection unit that detects plasma generated at the weldment and a spectroscopic unit that detects wavelength-specific luminosity at the weldment, wherein the optical device determines an occurrence of welding defects at the weldment based on the detected heat, the detected plasma, and / or the detected wavelength-specific luminosity of the weldment.

The invention relates to the technical field of light detection, in particular to a light detection sensor and a light projection device and an optical module thereof, the light projection device comprises an illumination optical system, a light modulation element and a projection optical system, and the illumination optical system is configured to emit light advancing along a first preset light path; the light modulation element is configured to receive light emitted by the illumination optical system and modulate the light to generate modulated light, and the modulated light travels along a second preset light path; the projection optical system is configured to receive the modulated light and guide the modulated light to advance along a second preset light path; the projection optical system comprises a plurality of lenses, and optical axes of partial lenses in the plurality of lenses are offset by a preset offset amount relative to a main optical axis of the projection optical system. According to the invention, under the condition that a relatively small Samm angle is adopted, the misalignment amount is preset for a part of lenses in the plurality of lenses, so that the miniaturization requirement of the sensor can be met, and the light energy transmission efficiency can be improved.

A method is disclosed for use in detecting a pulsed optical beam when the pulsed optical beam is transmitted through a scattering medium, wherein the pulsed optical beam comprises a plurality of optical pulses and the method comprises using a plurality of photodetectors of a photodetector array to detect light which is scattered progressively from the same optical pulse as the optical pulse propagates through a plurality of regions of the scattering medium and which is then received progressively on different photodetectors of the photodetector array. The method may be used in particular, though not exclusively, for non-line-of-sight free-space optical communications. An optical receiver for use in detecting the pulsed optical beam and an associated optical system are also disclosed.

The invention discloses an ultra-compact near-infrared circularly polarized photoelectric detector, which comprises an upper metal electrode plating layer, a lower metal electrode plating layer, a semiconductor substrate, a hexagonal close packing array substrate and a chiral super-surface layer, and can realize rapid and high-responsivity near-infrared circular polarization dependent light detection, and light signals can be directly converted into visible electric signals under zero bias voltage; different photoelectric signal conversion effects can be generated from different directions under irradiation of light with different wavelengths, and reference is provided for preparation of a multi-mode near-infrared circularly polarized photoelectric detector. The invention also discloses a preparation method of the ultra-compact near-infrared circularly polarized photoelectric detector, the preparation method is simple and convenient, the cost is relatively low, batch preparation can be realized, and the produced ultra-compact near-infrared circularly polarized photoelectric detector has the characteristics of high light absorbance, quick response and ultrahigh integration level.

A light detection device according to one embodiment of the present disclosure comprises a light-receiving element that can receive light and output a current, a control circuit that can output a first signal and a second signal, a connection circuit that is provided between the light-receiving element and a first potential line and is controlled by the first signal, and a detection circuit that can output a third signal that is based on the current from the light-receiving element in accordance with the second signal.