45 results about "Light speed" patented technology

The invention discloses a measurement data calibration method and device, electronic equipment and a program product, and relates to the technical field of communication and radar, and the calibration method comprises the steps: employing a radar to measure a target object to obtain initial data, employing a preset device to measure the radar to obtain attitude angle data, the initial data at least comprises the azimuth angle and the pitch angle of the target object and the reflection echo duration of the radar; obtaining the deployment height of the radar, and calculating the initial height of the target object based on the light velocity, the reflection echo duration, the pitch angle and the deployment height; and constructing a target rotation matrix based on the attitude angle data, calibrating the initial data based on the target rotation matrix to obtain target data, and calibrating the initial height based on the target data to obtain the target height. According to the invention, the technical problem of low precision of radar detection data in the prior art is solved.

A system includes a projector that projects a light pattern having a time-domain modulation onto an object, the time-domain modulation including an integer number of adjacent modulation cycles. The system also includes a first time of flight (ToF) camera having a lens and a two-dimensional (2D) pixel array that converts light reflected by the object into an electrical signal. The at least one processor determines three-dimensional (3D) coordinates of a point of the object based at least in part on the electrical signal, the baseline length, the time-domain modulation, and the velocity of light in the air.

A device, method, and hybrid computing architecture for a Symbolic Photonic Logic Gate (SPLG) system that performs data processing primarily in the optical domain. The system comprises a photonic substrate, including silicon-photonics, indium phosphide, or similar optically active materials, patterned with optical waveguides and interferometric structures configured to implement logic operations through controlled optical interference, phase modulation, or non-linear optical effects. The SPLG system is configured to execute Boolean and symbolic logic functions without requiring intermediate optical-to-electrical signal conversion. In operation, information is encoded into one or more optical parameters including phase, polarization, wavelength, or amplitude, and processed within a Symbolic Optical Core optimized for linear algebraic operations such as matrix multiplication and vector transformation. The architecture further comprises an electronic control layer configured to initialize, configure, and monitor the photonic logic elements while allowing the majority of computational operations to occur within the optical domain, thereby reducing electrical interconnect congestion and resistive heating relative to fully electronic processors.

A computer-free system and method is disclosed that uses an all-optical image reconstruction method to see through random diffusers at the speed of light. Using deep learning, a set of transmissive layers are trained to all-optically reconstruct images of arbitrary objects that are distorted by random phase diffusers. After the training stage, the resulting diffractive layers are fabricated and form a diffractive optical network that is physically positioned between the unknown object and the image plane to all-optically reconstruct the object pattern through an unknown, new phase diffuser. Unlike digital methods, all-optical diffractive reconstructions do not require power except for the illumination light. This diffractive solution to see through diffusive and / or scattering media can be extended to other wavelengths, and can fuel various applications in biomedical imaging, astronomy, atmospheric sciences, oceanography, security, robotics, autonomous vehicles, among many others.

A system for measuring 3D coordinates of surfaces in the environment is provided. The system includes a body configured to rotate about an axis. A light source is configured to emit a pattern of light, the pattern of light. A two-dimensional array of pixels is coupled to the body and configured to receive a reflection of the pattern of light. A controller is electrically coupled to the light source and the two dimensional array of pixels, the controller configured to a determine a distance to at least one surface in the environment based at least in part on a reflection of the pattern of light from a surface in the environment and a speed of light in air.

The application provides a method for measuring liquid level in a container based on DTOF, a DTOF module and the container. The container is provided with the DTOF module. The method for measuring liquid level in the container comprises the following steps: emitting detection light to the container; receiving reflected light reflected by the detection light; obtaining total flight time according to the emission time of the detection light and the receiving time of the reflected light; calculating target distance according to the total flight time, light speed and the refractive index of the medium through which the detection light is transmitted to the current liquid surface of the container; determining the liquid level in the container according to the target distance and notifying the user. In addition, the application also provides a device for measuring liquid level in a container based on DTOF and the container. The technical scheme of the application effectively solves the problem that the liquid level in the container cannot be accurately measured.

The invention discloses a direct current line distance protection method and device based on fault voltage reconstruction, and belongs to the field of power system relay protection. The method comprises the following steps: acquiring voltage data and current data at a fault moment and a protection device installation position, and carrying out low-pass filtering processing to obtain a measured voltage and a measured current; according to the voltage data, the current data, the preset fault distance and the light velocity, constructing a fault point voltage time sequence from the fault moment to the current moment, and performing low-pass filtering processing to obtain a fault point reconstruction voltage time sequence; according to the measured voltage, the measured current and the fault point reconstruction voltage time sequence, a fault distance equation is obtained in combination with the line model; solving the fault distance equation to obtain a corresponding fault distance calculation value; when the fault distance calculation value converges in a preset time period, comparing the fault distance calculation value with a preset protection range setting value; and judging a fault type. The influence of the line parameter frequency variation characteristic on the distance protection calculation result is eliminated, and the fault distance is accurately calculated.

The invention discloses a storage and calculation integrated photon calculation system and method based on a phase change metasurface and holographic light field modulation, and aims to solve the problems that storage and calculation are separated, the dynamic modulation speed is low and the precision is limited in an existing photon calculation framework. The invention provides a hybrid computing architecture which takes a blue-ray disc or a phase change storage wafer as a high-density holographic weight storage medium and is combined with a high-speed spatial light modulator and a photoelectric nonlinear activation circuit. Through an area array parallel reading mechanism, a large-scale weight matrix is read at one time by using beam-expanded coherent light, light velocity matrix multiplication is completed, and interlayer fast switching of the deep neural network is realized in combination with a streaming rotation or light beam scanning technology. According to the invention, the non-volatility and multistage refractive index characteristics of the phase change material are utilized to realize high-density on-chip storage and zero-power-consumption lossless reading of large model weight, and the problems of a video memory wall and an energy consumption wall in large model reasoning are effectively solved.

The utility model relates to the technical field of valve bevel grinding machine main shaft detection, in particular to a coaxiality detection device for valve bevel grinding machine main shaft processing, which comprises a main body, the top of the main body is fixedly connected with a laser centering detection assembly and a rotation adjusting assembly, and the top of the rotation adjusting assembly is fixedly connected with a clamping assembly; according to the utility model, the laser transmitter is used for transmitting the laser beam, the laser beam is irradiated to the photoelectric detector of the receiver, the coaxiality of the main shaft of the valve bevel grinding machine is further detected, the laser test can realize extremely high measurement precision, the error can be controlled at a micron level or even a nano level, and the laser test is based on light velocity propagation. The measurement process is almost instantly completed, a large amount of data can be rapidly collected, the high-speed response capability enables the device to be especially suitable for dynamic measurement and real-time monitoring, laser testing does not need to make contact with a measured object, and damage or interference to the measured object is avoided.

The present application relates to the technical field of optical thickness measurement, in particular to a kind of ice thickness measurement method based on laser technology, comprising the following steps: first and second wave band laser beam coaxial superposition lock initial phase difference generation calibration set, analysis beam table bottom interface reflection transmission and utilize detector to capture waveform, separate time of flight difference and compare double wave band propagation time delay to generate characteristic matrix, extract propagation power attenuation and combine dynamic refractive index to correct light speed to obtain geometric thickness result numerical value.In the present application, by constructing double wave band interface reflection analysis mechanism, the non-uniform beam tracking denoising ability is strengthened, the distortion interference caused by multipath scattering is effectively solved, the inherent wave band delay jitter is separated, and the signal attenuation caused by medium loss is reduced, combined with refractive compensation attenuation, the physical space solving accuracy is corrected, the bubble and inclination optical path error are eliminated, the detection purity is ensured, and the ice layer physical thickness reconstruction stability and monitoring precision are greatly improved.

The invention discloses a backward air laser enhancement method based on a flight focus. Firstly, the pulse width of a flight focus is determined according to the requirement for synchronous transmission of back air laser, and the speed of the flight focus is made to be the back light speed. Then, the required laser pulse chirp amount is calculated according to the target speed, and parameters of a dispersion regulation and control module are set; in an experiment, a laser pulse is modulated into a negative chirp by using a grating pair, and then a flight focus is formed through a dispersion focusing system. Enhanced backward air laser output is achieved by optimizing motion parameters of a flight focus. Dynamic movement of the focus is achieved through chirp regulation and dispersion focusing, the focus of the pump laser moves back to back and is consistent with the transmission direction of the back air laser, and therefore the gain length is remarkably prolonged, output energy is improved, limitation of the traveling wave excitation effect is effectively overcome, and the service life of the laser is prolonged. And a new technical approach is provided for realizing long-distance backward air laser output.

The application discloses a resonant cavity-based optical beat method light speed measuring device and measuring method, and belongs to the light speed measuring field. The measuring device comprises a laser emitter. One side of the laser emitter comprises, in sequence along the light path direction, an acousto-optic device, two plane mirrors, a half-transmitting and half-reflecting mirror and an illuminance detector. The laser emitter generates monochromatic light. The monochromatic light enters the acousto-optic device to obtain two light waves with a frequency difference, and coupling is performed to obtain one beat wave. The beat wave changes direction after passing through the two plane mirrors and enters the half-transmitting and half-reflecting mirror. The half-transmitting and half-reflecting mirror transmits the beat wave, and at the same time, reflects a part of the beat wave reflected by the illuminance detector, so that the beat wave is reflected back and forth between the half-transmitting and half-reflecting mirror and the illuminance detector. The illuminance detector receives the beat wave on a light-sensitive surface thereof while reflecting a part of the beat wave, so as to measure the illuminance value of the beat wave. The measuring device further comprises a frequency meter, and the frequency meter displays the acoustic frequency of the acousto-optic device. The light speed can be measured by using the measuring device.

This invention provides a dynamic clock compensation device and method for a time-transfer receiver, comprising an adaptive amplification unit, a waveform shaping unit, an FPGA-based time-to-digital converter, and a data processing unit. The 1PPS signal generated by the GNSS receiver serves as the START signal, and the 1PPS signal from the external clock serves as the STOP signal. Both signals pass through the adaptive amplification unit and the waveform shaping unit, respectively. The shaped 1PPS signals are then sent to the FPGA-based time-to-digital converter to be converted into digital count values. These count values ​​are then sent to the data processing unit, which calculates the time difference between the two 1PPS signals based on the counting frequency. Finally, the time difference is multiplied by the speed of light to convert it into a distance value, which is then used to compensate for the pseudorange measured by the GNSS receiver.

An apparatus, methods, and a device for delivering a rhythmic light pattern to a surface including a housing, a laser source for delivering light in a controlled direction and rhythm, a port to communicate with a controller, and a base to support the housing. Some embodiments include a speaker. The speaker and laser source may have coordinated direction and rhythm. The speaker may play human speech, music, percussion, or a combination thereof and the speaker volume may be less than 80 decibels. The light may illuminate a surface comprising a ceiling, wall, screen, drape, curtain, partition, floor, door, or glass. The controller may include a mobile phone, computer, mp3 player, or automated metronome. The controller may control light intensity, light speed, audio settings, or a combination thereof. Some embodiments may include a remote control to control light intensity, light speed, audio settings, or a combination thereof.

The utility model discloses a mixed light source time sequence projection system, which comprises a first light source group, a second light source group and an electrochromism device, the directions of light beams emitted by the first light source group and the second light source group are perpendicular to each other, and the wave band ranges of the light beams of the first light source group are different from those of the light beams of the second light source group; and the electrochromism device is arranged on emergent light paths of the first light source group and the second light source group, forms an angle of 45 degrees with the emergent light speed direction of the first light source group and the second light source group, and is used for transmitting a light beam of the first light source group and reflecting a light beam of the second light source group. The beneficial effects of the utility model are that the second light source group is used for light supplement of the light sources, so that the brightness and the color gamut can be increased.

The present application relates to the field of optical technology, particularly to interferometer. The interferometer based on light speed adjustment includes an interferometer system, the interferometer system includes a laser and optical device irradiated by the laser, and includes a light speed path difference fine adjustment system; the light speed path difference fine adjustment system includes a glass tube, a transparent liquid container and a two-way pump; the glass tube has a liquid supply port on the side wall, the liquid supply port is connected to one pump port of the two-way pump, the other pump port of the two-way pump is connected to the transparent liquid container, and the transparent liquid container stores transparent liquid; there is a vertical light path between the laser and at least one optical device, and the glass tube is vertically arranged in the vertical light path.

A system includes a light source configured to emit pulsed laser light, and a photodetection unit including a plurality of photoelectric conversion units arranged in a two-dimensional plane, wherein an emission timing of the light source and a detection timing of the photodetection unit are controlled by a timing control unit, wherein the photodetection unit detects scattered light on the two-dimensional plane, of the pulsed laser light emitted from the light source and entering an object, and wherein change of a refractive index of the object is estimated from change of light speed of the scattered light.

The application discloses a photonic deconvolution acceleration system, which is composed of a laser, a light source modulator, an optical beam splitter, an MZI, a phase shifter and an optical balanced detector to complete the deconvolution operation, replaces the deconvolution operation layer in the Spiking-FlowNet neural network architecture which occupies a large amount of computing power, and can greatly improve the computing speed and overcome the slow problem of the electric-based deconvolution operation. Meanwhile, the array formed by the MZI has the characteristics of strong reconfigurability, and the phase shifter can be used to change the transmission matrix of the MZI array, so that the deconvolution operation process of different channels can be completed. When the photonic deconvolution acceleration system is applied to optical flow estimation, an accelerated hybrid optoelectronic Spiking-FlowNet neural network architecture is designed, which fully utilizes the characteristics of parallelism, low power consumption and light speed calculation of optical calculation, and can complete the optical flow estimation more quickly and energy-efficiently while retaining the original accuracy of the Spiking-FlowNet neural network architecture.

The unmanned aerial vehicle management and control system comprises an unmanned aerial vehicle management and control intelligent street lamp subsystem, an unmanned aerial vehicle subsystem and a roadside server, and the roadside server is in signal connection with the unmanned aerial vehicle management and control intelligent street lamp subsystem through a fixed wireless communication module; the unmanned aerial vehicle subsystem is in signal connection with the fixed wireless communication module in the unmanned aerial vehicle management and control intelligent street lamp subsystem through the mobile wireless communication module; and receiving the arrival time information of the optical signal, resolving the three-dimensional coordinate, the speed and the course of the unmanned aerial vehicle, compensating the light speed according to the meteorological monitoring data, and generating a control instruction for the unmanned aerial vehicle in combination with the electronic fence information. According to the invention, an urban roadside street lamp network can be effectively integrated and enabled, so that the urban roadside street lamp network becomes a basic sensing and positioning carrier of a novel unmanned aerial vehicle management and control system, and the urban low-altitude target collaborative management and control capability with low cost, high coverage density, full time and accurate positioning is realized.

The utility model provides a heating structure, a heating device and an aerosol generating system, and belongs to the technical field of aerosol forming matrices, the heating structure comprises a support body, a light condensation part and a light emitting part, an insertion hole for the aerosol forming matrices to be inserted is formed in the support body, the light condensation part is installed on the support body, the light emitting part is installed on the support body, and the light emitting part is installed on the support body. Light emitted by the light-emitting part is condensed by the light-condensing part and then is emitted to the direction of the jack. According to the heating structure provided by the invention, the light emitting part can emit light, the light waves are almost not too much consumed in the air and the speed is the light speed when being transmitted, and then the light waves are concentrated and energy-gathered through the light gathering part so as to heat the aerosol forming substrate, so that the efficiency of heating the aerosol forming substrate by the heating structure can be improved, and the experience of a user is improved.

This invention relates to the field of optical thickness measurement technology, specifically a laser-based ice thickness measurement method, comprising the following steps: coaxially superimposing first and second band laser beams to lock the initial phase difference and generate a calibration set; analyzing the reflection and transmission at the beam surface and bottom interface and capturing the waveform using a detector; separating the time-of-flight difference and comparing the propagation delay of the two bands to generate a feature matrix; extracting the power attenuation after propagation and combining it with dynamic refractive index to correct the light speed and obtain the geometric thickness result. In this invention, by constructing a dual-band interface reflection analytical mechanism, the denoising capability of non-uniform beam tracking is enhanced, effectively solving the distortion interference caused by multipath scattering; separating inherent band time delay jitter and reducing signal attenuation caused by medium loss; and combining refraction compensation attenuation correction to correct the physical space solution accuracy, eliminating bubbles and tilt angle optical path errors, ensuring detection purity, and greatly improving the stability and monitoring accuracy of ice layer physical thickness reconstruction.

The invention provides a photoelectric fusion convolution calculation system and method. The photoelectric fusion convolution calculation system comprises a server, a field programmable gate array and an optical chip, the server is used for acquiring a data set and preprocessing the data set; performing electrical network calculation of the convolutional neural network except the first layer of convolution operation on the data set; the field programmable gate array is used for performing photoelectric signal conversion on the data set based on the analog-to-digital converter and the digital-to-analog converter; and the optical chip is used for executing a first layer of convolution operation of a convolutional neural network on the data set based on the optical matrix calculation module of the cascaded Mach-Zehnder interferometer. By means of light velocity transmission and parallel processing characteristics of optical signals, multi-channel and multi-pixel parallel multiplication and addition operation is achieved, and the convolution calculation speed is increased; energy loss caused by resistance is reduced in an optical calculation mode, and therefore system power consumption is effectively reduced. A preprocessing and post-processing module in a deep learning network does not need to be transformed, a convolutional layer can be directly replaced, and good system compatibility is achieved.

The invention discloses an automatic skiascopy optometry system and method based on reflected light velocity analysis, and the system comprises an incident light plate, an automatic lens assembly, a photoelectric detection mechanism and a calculation processor, the incident light plate is used for projecting a beam of incident light band with a fixed swing speed and a fixed width to human eyes, the photoelectric detection mechanism is used for receiving a reflection light band reflected by the human eye retina and generating an electric signal. The calculation processor is configured to continuously analyze the electric signals to calculate the moving speed and direction of the reflection light band; a closed-loop feedback is executed, and as long as the moving speed is not zero, the turntable is commanded to rotate so as to change the degree of the lens; and when the moving speed is zero, rotation is stopped, and the current lens degree is output as a refraction measurement result. Unification of measurement references is guaranteed through fixed incident light band projection, and objective and accurate refraction measurement is realized through signal analysis and closed-loop feedback automatic adjustment of the lens degree by the calculation processor.

The application provides a Bluetooth ranging method, comprising: a master node sends a first signal to a slave node, the signal flight time of the first signal reaching the slave node is T1, and the intensity indication of the first signal is RSSI1; the slave node sends a second signal to the master node, the signal flight time of the second signal reaching the master node is T2, and the intensity indication of the second signal is RSSI2; an equation is constructed to solve the signal flight time measurement deviation of the first signal and the second signal: d=(T1+Delta t1)*C, wherein C is the speed of light. The ranging method in the application can effectively combine two ranging methods, fuse and correct the two kinds of measurement information, and improve the overall measurement accuracy of the ranging system; and the ranging method does not need other hardware settings, and can be realized by using the existing Bluetooth device, which is convenient and efficient.

The application discloses a positioning method and system of multiple positioning piles, an electronic device and a storage medium. The method comprises the following steps: a time-providing device sends a time-providing signal to multiple first positioning piles on a first frequency band; each first positioning pile receives the time-providing signal on the first frequency band, and calibrates the time of each first positioning pile based on the time of the clock of the time-providing device; each first positioning pile sends a positioning signal in a corresponding coverage range; a positioning device receives positioning signals of multiple second positioning piles; and the positioning device determines target position information of the positioning device based on the time stamp of the received positioning signal of each second positioning pile, the receiving time of the positioning device receiving the positioning signal of each second positioning pile, the speed of light and the first position information of each received second positioning pile.

The utility model provides an S wave band linear accelerating tube which comprises a tube body, an input coupler and an output coupler are respectively arranged at the front end and the rear end of the tube body along the beam transmission direction, a plurality of cavities are arranged in the tube body, the cavities are separated by column pieces, beam holes are arranged in the middle of the column pieces, and the beam holes are communicated with the beam holes. The cavity comprises a plurality of beam bunching cavities and a plurality of light velocity cavities along the beam transmission direction, the cavity lengths of the beam bunching cavities along the beam transmission direction are gradually increased, the cavity lengths of the light velocity cavities are the same, and the aperture of the beam hole is gradually reduced along the beam transmission direction. The S-band linear accelerating tube is simple in structure, low in manufacturing and installation cost and capable of meeting the requirement for high-power output.

A method for designing a spatial mode multiplexer based on diffracted light calculation is provided. A gradient of blocks of a phase plate is determined by interference patterns of forward diffracted light and backward diffracted light; and for the iteration of the blocks of the phase plate, an update step is determined using a gradient descent algorithm. According to the method, the design process utilizes the real beam transmission process, which brings higher accuracy compared to digital simulation. At the same time, diffracted light calculation is always performed at the speed of light and is highly parallel, which can improve the efficiency of optimization design.

The utility model relates to a steel structure hoistway settlement monitoring device which comprises more than three settlement observation datum points which are arranged on a foundation under the bottom of a steel structure hoistway at intervals, all the settlement observation datum points are located on the same horizontal plane, and all the settlement observation datum points cannot be located on the same straight line. The reflecting flat plate is arranged at the bottom of the steel structure hoistway and is perpendicular to the center line of the steel structure hoistway structure; an optical distance measuring sensor is mounted on each settlement observation datum point, each optical distance measuring sensor is not connected with the reflecting flat plate, and the speed of light emitted by each optical distance measuring sensor is perpendicular to the horizontal plane; the system further comprises a controller and a wireless communication module. Each optical distance measuring sensor is electrically connected with the controller, and the wireless communication module is in communication connection with the controller. The steel structure hoistway settlement monitoring device is simple in structure, low in cost and capable of effectively monitoring the settlement condition of the steel structure hoistway.

The invention provides a photon computing chip, system and method based on a photon hybrid expert network. An on-chip input waveguide is used for determining an input optical signal and multi-task data; the amplitude modulation interferometer is used for carrying out amplitude modulation on an input optical signal so as to load information of multi-task data; determining optical signal distribution information generated by the hybrid routing network; correspondingly distributing the optical signals after amplitude modulation to a plurality of parallel photon expert networks based on the optical signal distribution information; the plurality of single-chip integrated parallel photon expert networks are used for carrying out phase modulation on the signal after amplitude modulation by adopting a diffraction grating structure; and the on-chip output waveguide is used for outputting the optical signals output by the plurality of parallel photon expert networks. According to the invention, parallel processing of multiple tasks can be realized, efficient calculation is carried out by using a passive optical diffraction structure, and the system has the remarkable advantages of low power consumption, high parallelism, light velocity processing and large-scale expansion.

The application relates to an aviation blade straightening torque wrench system and relates to the field of aviation blade straightening, which comprises a hydraulic torque wrench system, the hydraulic torque wrench system comprises a wrench head, the wrench head is provided with a diffuse reflection plane; further comprising a laser interferometer, the laser interferometer comprises a laser, a beam splitter and an interference detection system, the beam splitter divides an incident light beam into a measuring light beam and a reference light beam and projects the measuring light beam and the reference light beam to the diffuse reflection plane; further comprising an optical collimation system, the optical collimation system comprises two hollow straight pipes, optical component systems are arranged behind the two hollow straight pipes; the interference detection system is connected with a hydraulic control system; a light speed adjusting pipe is arranged on a light path of the measuring light beam, the light speed adjusting pipe comprises a stainless steel pipe; further comprising an air compressor, the air compressor is connected with the inside of the light speed adjusting pipe, an air inlet of the air compressor is connected with a gas container; further provided with a refrigeration system, a refrigeration pipe is wrapped outside the stainless steel pipe, and a temperature sensor is attached to the inner wall of the stainless steel pipe. The application has the effect of realizing high-precision torsional straightening of aviation blades.