156 results about "Light speed" patented technology

The invention provides a method for capturing measurement and control signals of an unmanned aerial vehicle, a related device and a computer storage medium, and the method comprises the steps: obtaining the current time in the ephemeris information of a current low-orbit satellite, the distance between the current low-orbit satellite and the unmanned aerial vehicle, the carrier frequency of a transmitted signal, and the light speed; calculating to obtain a predicted value of Doppler frequency offset of the unmanned aerial vehicle measurement and control signal; determining a coarse estimation value of Doppler frequency offset of the unmanned aerial vehicle measurement and control signal according to a sampling result of the unmanned aerial vehicle measurement and control received signal and a prediction error range; correcting the rough estimation value of the Doppler frequency offset of the measurement and control signal of the unmanned aerial vehicle by adopting a Shannon interpolation algorithm to obtain a Doppler frequency offset value of the measurement and control signal of the unmanned aerial vehicle; and finally, carrying out carrier frequency compensation according to the coarse estimation value and the fine estimation value of the Doppler frequency offset of the unmanned aerial vehicle measurement and control signal to obtain a compensated unmanned aerial vehicle measurement and control signal. The method effectively reduces the frequency domain search range, shortens the signal capture time, improves the estimation precision of Doppler frequency offset, and improves the precision of measurement and control signals of an unmanned aerial vehicle.

The method is based on a core idea of unifying a field theory and an interference field theory, is devoted to exploration and expansion of an artificial field frontier technology, and covers an artificial field plus quality technology, an artificial field interference technology and an artificial field control space-time technology. In the research process, mutual verification of experiments and theories is paid attention to. Theoretically, internal correlation among Planck mass, electron mass, gravitational force, electric field force, magnetic field force and fine structure constants is deeply analyzed, a conclusion that the gravitational force, the electric field force and the magnetic field force are equal when a substance reaches a light velocity is obtained, and a unique quantum effect is presented. In the aspect of experiments, a simple verification method is adopted, and substances are placed in a positive electrode area and a negative electrode area respectively. Along with the enhancement of the electric field intensity and the action time, the substance mass in the positive electrode area is gradually reduced, and the substance mass in the negative electrode area is correspondingly increased. The phenomenon can be explained as that the space where the positive charges are located has divergence characteristics and the space where the negative charges are located has convergence characteristics, so that the masses of the substances in the positive and negative electrode areas are changed alternately.

The invention discloses a wireless light transmission method for an unmanned aerial vehicle. The wireless light transmission method comprises the following steps: S100, adopting an LD light source with a tail fiber as a signal source to send a signal at a sending end; s200, when the system tracks and aligns, a variable-focus optical fiber collimator of an optical fiber light outlet is rotated and / or rotated to adjust, zooming is achieved, the light emitting angle of a light source is changed, and then the system adapts to signal transmission of different distances and different angles; s300, taking a large-view-field MPPC array as optical signal receiving equipment at a receiving end, and calling a built-in multi-array-element channel combined likelihood receiving algorithm for receiving based on the jittering of the unmanned aerial vehicle in the receiving process; the invention further discloses an unmanned aerial vehicle wireless light transmission system. According to the technical scheme, alignment control is more flexible, a tracking system is simpler and more convenient, convergence, collimation and divergence of light velocity are achieved, different communication requirements of high-speed communication, long-distance communication and large-angle communication are met, efficient receiving of an unmanned aerial vehicle optical communication system is achieved, and the performance of long-distance outdoor optical communication is remarkably improved.

The invention discloses a laser optical axis and detector automatic alignment method and system. The method comprises the following steps: controlling a three-axis displacement table to scan echo signal coordinates to automatically adjust laser emission power; an echo signal space range is determined through scanning, and initial particles are arranged on an axial plane with small light spots and strong light intensity; after setting particle swarm parameters, iteratively updating an inertia weight and a particle number by using a dynamic PSO particle swarm optimization algorithm, calculating particle positions, obtaining a light intensity value, and determining a close-range optimal relative position; meanwhile, the image distance difference between far and near targets is calculated, and the Z axis of the three-axis displacement table is controlled to complete axial compensation; the echo deviation angle and the radial displacement are calculated according to the motor rotating speed, the target distance and the light velocity, the X axis is controlled to complete radial compensation in combination with the radius of the target surface of the detector, and accurate alignment is achieved. The alignment efficiency and precision are greatly improved, and the defects that a traditional method is slow in positioning and low in precision are overcome.

The invention provides a light velocity chip cooling system, and relates to the field of chip cooling. The light speed chip cooling system comprises a base, an upper shell is arranged above the base, a lower shell is arranged below the base, diffusers are arranged at the left end of the upper shell and the left end of the lower shell, collectors are arranged at the right end of the upper shell and the right end of the lower shell, an air inlet structure used for conducting air cooling heat dissipation on a chip is arranged at the left end of the base, and an air outlet structure used for conducting air cooling heat dissipation on the chip is arranged at the right end of the base. The right end of the base is provided with an air outlet structure used for conducting air cooling heat dissipation on the chip, and the upper side and the lower side of the base are provided with liquid cooling structures used for conducting liquid cooling heat dissipation on the chip. According to the light speed chip cooling system, the chip is placed in the base, the chip can be covered and sealed through the upper shell and the lower shell, then air cooling heat dissipation can be conducted on the chip through the air inlet structure and the air outlet structure, liquid cooling heat dissipation can be conducted on the chip through the liquid cooling structure, and therefore the heat dissipation effect on the chip can be improved.

The invention discloses a power transmission line lightning stroke whole process data processing method, device, equipment and medium, and relates to the field of power transmission line lightning stroke monitoring, and the method comprises the steps: obtaining first monitoring data, second monitoring data and third monitoring data recorded by a lightning positioning system, a distributed traveling wave device and a fault recording device in a lightning activity time window; performing reverse calculation on the first monitoring data and the second monitoring data by adopting a light velocity inversion algorithm to obtain a time difference value and a distance difference value between the distributed traveling wave device and the lightning positioning system, and removing part of monitoring data which does not conform to the time difference value and / or the distance difference value in the second monitoring data to obtain fourth monitoring data; the timestamps of the first monitoring data, the third monitoring data and the fourth monitoring data are sequenced in sequence in the time window, and a time sequence of thunder and lightning events is obtained; and processing the first monitoring data, the third monitoring data and the fourth monitoring data according to the time sequence to obtain monitoring data of the whole lightning stroke process.

To provide a method for operating an optical device which can be easily manufactured.SOLUTION: There is provide a method for operating an optical device by propagating light with a frequency f, the optical device comprises a first optical waveguide and a second optical waveguide arranged on a substrate. The optical device has an optical coupling region in which an interval between the first optical waveguide and the second optical waveguide is smaller than that in other regions so that light is coupled between the first optical waveguide and the second optical waveguide. In the optical coupling region, there is provided a grating structure in which, first refractive index material and second refractive index material having a refraction index lower than that of the first refractive index material are alternately arranged at a frequency Λ in a light propagation direction, the grating structure is arranged around the first and second optical waveguides. When light speed in vacuum is denoted as c0, an effective refractive index corresponding to an optical waveguide mode in the optical coupling region is denoted as neff, the light with the frequency f in which the frequency Λ satisfies 11c0 / (20neff f)≤Λ≤3c0 / (4neff f) is propagated to the optical device for operating the optical device.SELECTED DRAWING: Figure 3

1. The name of this design product: Laser flow velocity measurement system storage box. 2. Purpose of this design product: used to store low-light speed measurement equipment. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The present application provides a method and system for wide-area ocean panoramic fusion based on multi-source data, the method comprising: acquiring multiple images and extracting calibration points of the images, calculating the parameters of the camera, selecting a reference image from the image using the minimum spanning tree method, and sorting the remaining images; using a direct linear transformation algorithm to obtain the transformation matrix between two images with overlapping areas in all images, and obtaining the projection transformation relationship between all remaining images and the reference image; using a bundle adjustment method to optimize the parameters and obtain the calibrated camera parameters; and using an improved graph cut algorithm to perform splicing and fusion processing on multiple images to generate a panoramic fusion image of the sea surface. The calibration point residuals are collaboratively optimized using the light speed adjustment method to obtain the calibrated camera parameters, thereby constraining the overall geometric structure of the camera. The improved graph cut algorithm can be applied to the sea surface splicing application scenario to achieve the fusion of sea surface panoramic images.

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.

1. The name of the product under this design: Slippers (Light Speed ​​6413). 2. Purpose of this design product: to be worn on the feet. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

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.

The present invention discloses an enhanced LDACS ranging method based on improved super-resolution time delay estimation, which belongs to the field of aviation navigation technology. First, the FL signal transmitted by the LDACS ground station to the airborne station is monitored and recorded in real time, and then the FL signal is coarsely synchronized, and the improved S&C algorithm is used to determine the synchronization sequence position and compensate for the frequency offset to obtain a rough arrival time TOA. Then, the weighted TLS algorithm is used to perform fine synchronization estimation on the signal transmission delay to obtain a more accurate TOA. Finally, the distance between the ground station and the airborne station is calculated based on the TOA multiplied by the speed of light. The present invention adopts an improved super-resolution time delay estimation method, combined with coarse synchronization and fine synchronization strategies, which can achieve more accurate signal transmission delay estimation in a noisy environment, improve the ranging accuracy, adaptability and robustness. Experimental results show that this method significantly improves the accuracy and stability of LDACS ranging.

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.

To induce a crosstalk as stray light by reflecting a light quantum by avalanche light emission with a Si back surface of a moth eye structure.SOLUTION: A photoelectric conversion device has a plurality of avalanche diodes arranged on a semiconductor layer having a first surface and a second surface that is opposite to the first surface. Each of the plurality of avalanche diodes includes: a first conductive type first semiconductor region arranged at a first depth; and a second conductive type second semiconductor region arranged at a second depth deeper than the first depth relative to the second surface. The semiconductor layer comprises an uneven structure provided to the first surface, and an actual period of the uneven structure is smaller than hc / eEa (h: a Planck constant, c: a light velocity, e: an elementary electric amount, and Ea: band gap of the semiconductor layer).SELECTED DRAWING: Figure 6

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.

A distance information acquisition device includes an irradiation unit configured to irradiate an object with light and a time of flight (ToF) sensor configured to receive light emitted from the irradiation unit and reflected by the object via an optical-system lens and acquires distance information for the object. The distance information acquisition device further includes a distance value acquiring unit configured to acquire a distance value on the basis of a timing at which emission of light is performed by the irradiation unit, a timing at which light is received by the ToF sensor, and the speed of light; a storage unit configured to store a predetermined numerical expression including at least information on an angle of view of the optical-system lens as a parameter, and a correcting arithmetic operation unit configured to calculate the distance information for the object.

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.

A device for measuring a carrier-envelope phase includes a first nonlinear optical crystal, a birefringent crystal, and a polarizing plate. The first nonlinear optical crystal produces a first Light that is a harmonic of an incident light and that has a polarization direction different from a polarization direction of the incident light. The birefringent crystal is downstream of the first nonlinear optical crystal in a light traveling direction, and a traveling speed of a light traveling along a slow axis is different from a traveling speed of the light traveling along the fast axis. The polarizing plate is downstream of the birefringent crystal in the light traveling direction, and a transmission axis of the polarizing plate is different from both the slow axis and the fast axis.

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.

In a time synchronization system, a network controller sets transmission distance information on a transmission distance through which an optical signal is transmitted between transmission and receiving servers via a queueless network to a receiving server, based on network topology information. The transmitting server transmits a transmitting side current time synchronized with a reference time to the receiving server 12 via the queueless network. The receiving server calculates a transmission delay time between the transmission and receiving servers by dividing the transmission distance, which is based on the set transmission distance information, by light speed in the queueless network. A receiving side current time is calculated by adding the transmission delay time to the transmitting side current time.

The present application discloses a method and device for partial discharge localization based on optical fiber sensing to measure ultrasonic signals. The solution provided by the present application is based on the ultrasonic signals obtained by an optical fiber sensing measurement system. By performing a Hilbert transform on the output signal of the optical fiber sensing measurement system, that is, the amplitude of the Rayleigh backscattering spectrum curve group, and extracting its envelope, the modulation information of the ultrasonic signals is obtained. Then, through differential processing, the modulation effect on the disturbance signals is revealed. Based on the time interval when the peaks appear in the signal curve group after differential processing, combined with the speed of light and the equivalent group velocity in the optical fiber, and the triggering time of the pulse signal, the specific location of the disturbance is determined, realizing partial discharge localization based on optical fiber sensing to measure ultrasonic signals.

The invention relates to the technical field of mobile communication, and provides a method for improving network synchronization precision, which comprises the following steps of: firstly, inputting a distance of a nearest point user of an RU (Remote Unit), and converting the distance into a transmission time delay by using a light velocity, or directly using the transmission time delay 0; thirdly, counting the MSG1 TA measurement value of the user under the RU within a period of time, and subtracting the transmission time delay from the minimum value to obtain the time delay T containing the hardware processing time delay and the optical fiber time delay; and finally, adjusting the frame boundary advance T of the downlink signal of the RU, and compensating the time delay, so that the downlink signals of different RUs reach Tc-level time synchronization. Tc in 5G is about 0.5 ns, so that the synchronization precision reaches 0.5 ns, and the positioning resolution is improved to 0.15 m. According to the method, extra hardware is not needed, the cost is low, the uplink TA measurement value is used for controlling the downlink transmission clock, time delay is effectively compensated, and high-precision network synchronization is achieved.

A program causes a computer to execute a decision step of deciding a larger antenna size between antenna sizes of a transmitting antenna provided within a reverberation chamber in which a test object is arranged and a receiving antenna installed within the reverberation chamber as a target antenna size and a first calculation step of calculating a product of a value obtained by dividing a speed of light by the target antenna size decided in the decision step and a predetermined percentage of 30% or less as an interval between sampling frequencies for detecting a first frequency spectrum that is a frequency spectrum of a first transmission characteristic that is a transmission characteristic between the transmitting antenna and the receiving antenna.

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 present invention discloses a semiconductor nano-air-channel diode optical mixer, belonging to the technical field of semiconductor photodetectors and millimeter-wave / terahertz devices. The optical mixer includes a substrate, a semiconductor thin film, a nano-insulating layer, an upper electrode, and a lower electrode; it is a vertical structure or a horizontal structure. By using the nano-air channel as the channel for high-speed ballistic transport of photo-electrons, an optical mixer with a bandwidth above THz can be realized; moreover, applying a small bias voltage of several volts between the cathode and anode on both sides of the nano-air channel can generate carrier ionization multiplication in the semiconductor, doubling the photocurrent, responsivity, and optical-to-terahertz conversion efficiency; the semiconductor nano-air-channel optical mixer combines the advantages of near-light-speed ballistic transport of electrons in vacuum devices and high-integration batch processing of semiconductor devices, and is an effective solution for realizing a large-bandwidth and high-efficiency optical mixer.

A light speed engine is composed of a CD driver room, a coil and a conductor. The upper part of the CD-ROM room is in a vault shape, the lower half part of the CD-ROM room is vertical, and the bottom cover is in a totally-closed waterproof shape and is used for storing and outputting light wave driving force; the coil generates a magnetic field through current and outputs light wave driving force; the conductor can be a coil or a magnet and the like for mutual conversion of electromagnetism and light waves. When in use, a movement of a required engine is additionally arranged in the CD-ROM drive chamber, then the movement is connected to the external power switch through the CD-ROM drive chamber, and the engine can be started by turning on the power switch.

1. The name of the product of this design: Data cable (light speed four-in-one). 2. Purpose of this design product: used as a data cable. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: top view.

1. The name of this design product: Turn Signal Light (CG Light Speed). 2. Purpose of this design product: This design product is used for motorcycle lighting. 3. The key point of the design of this product lies in its shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.