12 results about "Rotational wave" patented technology

The disclosure presents a shaftless, brushless motor for rotating any optical or sensing element (e.g., a lens or mirror) at a distal end of a waveguide that also delivers electromagnetic radiation (e.g., light). Herein, the waveguide itself functions as the axle on which rotating components rotate, thereby avoiding blind spots and overcoming limitations in existing “micromotors”. The shaftless, distally driven motor significantly reduces motor size, while extremely small inertial loads and bearing sizes allow for high pitch cylindrical scanning with longitudinal velocity uniformity.

This state change detection system comprises: a rotation detection unit that outputs a pulse signal; a pulse calculation unit that obtains a pulse calculation waveform representing a pulse period for each rotation angle of a rotating body; a reference generation unit that generates a reference waveform in which an average pulse calculation waveform, which is obtained by averaging values of the pulse calculation waveform with an accumulated value for each rotation angle, is represented by the distribution for one rotation of the rotating body; a rotational fluctuation waveform generation unit that uses the reference waveform to generate a rotational fluctuation waveform obtained by extracting, from the pulse calculation waveform used to generate the reference waveform or a pulse calculation waveform succeeding the pulse calculation waveform, a fluctuation component other than a steady component that steadily occurs with the rotation of the rotating body; and a state change detection unit that detects a change in rotation state on the basis of the rotational fluctuation waveform.

This invention discloses an integrated wave energy and ocean current energy power generation device, relating to the field of power generation device technology. It includes a power generation mechanism comprising a rotating part one and a rotating part two; an ocean current energy capture mechanism, the power output end of which is connected to the rotating part one to drive its rotation; a mechanical motion rectification mechanism, comprising a reciprocating lifting part, a rotating output part, and a motion rectification structure, the motion rectification structure connecting the reciprocating lifting part and the rotating output part, capable of converting the bidirectional lifting power of the reciprocating lifting part into the rotational power of the rotating output part; the rotating output part is connected to the rotating part two, capable of driving the rotating part two to rotate in the opposite direction to the rotation of the rotating part one; and a wave energy capture mechanism, the floating output end of which is connected to the reciprocating lifting part. This invention couples a wave energy power generation device and an ocean current energy power generation device together, effectively summing the generator speeds, thereby improving energy utilization efficiency.

The invention belongs to the field of optical imaging, particularly relates to a multispectral full-polarization imaging device based on a rotating wave plate and an error correction method, and aims to realize high-precision multispectral full-polarization imaging. The device comprises a front imaging lens, a symmetric relay optical module, a polarization modulation module, a light splitting module, an image sensor, a rotation driving mechanism and a data processing and control module which are sequentially arranged along a light path. The symmetric relay optical module comprises a front lens group and a rear lens group which are in mirror symmetry about the aperture diaphragm, and the polarization modulation module and the light splitting module are located in a parallel light beam area formed between the front lens group and the rear lens group; the polarization modulation module comprises a quarter-wave plate capable of rotating around an optical axis and a fixedly arranged linear polarizer; the image sensor is located on an image space focal plane of the rear lens group, the rotation driving mechanism is connected with the quarter-wave plate, and the data processing and control module is in communication connection with the image sensor and the rotation driving mechanism.

A Rotary Waveguide Phase Shifter (RWPS) device adjusts the output phase of a high-power microwave waveguide. The device includes one or more mode converters for converting linear polarization to circular polarization, and a rotary metamaterial element (MME) which may be rotated, either manually or by a servomechanism, about an axis parallel to a direction of propagation. Quarter and half waveplate designs of the MME are provided. Calibration of the RWPS device enables continuous phase shifts from zero to 720 degrees with high accuracy and repeatability. The length of the device in the propagation direction is far less than that required by conventional dynamic phase shifters.

A wavelength conversion device comprises a wavelength conversion module and a driving assembly, the driving assembly is used for driving the wavelength conversion module to rotate with a central shaft as a rotating shaft, and the wavelength conversion module comprises a disc, a wavelength conversion layer and a counterweight part. The center of the disc is located on the center shaft and provided with a bearing surface perpendicular to the center shaft. The wavelength conversion layer is disposed on the bearing surface of the disk. The counter weight part is arranged on the disc and is in the radial direction perpendicular to the central shaft, the counter weight part is closer to the central shaft relative to the wavelength conversion layer, the counter weight part comprises a first counter weight element, the first counter weight element comprises a first light-curing material and a plurality of particles, the particles are uniformly distributed in the first light-curing material to form the first counter weight element, and the first light-curing material is arranged between the first light-curing material and the second light-curing material. Along the direction parallel to the central axis, the orthographic projections of the plurality of particles on the bearing surface are at least partially overlapped. The invention further provides a projection device and a manufacturing method of the counterweight piece. Therefore, the counterweight position can be adjusted more finely by using the first counterweight element.

The application discloses a kind of vector light field polarization state transient solution methods based on convolutional neural network, specific steps are as follows: construct the CNN for vector light field polarization state transient solution;Rotating wave plate experimental system is built, and the data set required for CNN training is obtained using rotating wave plate experimental system and CNN is trained;After improving rotating wave plate experimental system, vector light field polarization state transient solution system is obtained, using the system to obtain the light intensity diagram of transient vector light field, the light intensity diagram of modulated transient vector light field, and the polarization direction and ellipticity of the corresponding position of the output obtained from the light intensity diagram of transient vector light field are input into the CNN of training completion, to reconstruct vector light field vector light field polarization state.The application can high-precision instantaneous solve vector light field polarization state from vector light field light intensity diagram and modulated vector light field light intensity diagram, without rotating wave plate multiple times, with higher measurement efficiency and measurement accuracy, and has wide application prospect in the field of large bandwidth laser communication.

The present invention provides a system for detecting changes in the state of a rotating device, and a method for detecting changes in the state of a rotating device, which can reliably and quickly detect such changes. [Solution] The state change detection system comprises a rotation detection unit that outputs a pulse signal, a pulse calculation unit 49 that calculates a pulse calculation waveform representing the pulse period for each rotation angle of the rotating body, a reference generation unit 51 that generates a reference waveform in which the average pulse calculation waveform obtained by averaging the integrated values ​​of the pulse calculation waveforms for each rotation angle is represented as a distribution for one rotation of the rotating body, a rotation fluctuation waveform generation unit 53 that generates a rotation fluctuation waveform by extracting fluctuations other than the steady component that steadily occurs with the rotation of the rotating body using the reference waveform from the pulse calculation waveform used to generate the reference waveform or pulse calculation waveforms continuous with the pulse calculation waveform, and a state change detection unit 55 that detects a change in the rotation state based on the rotation fluctuation waveform.

The application provides a rotating beam physical layer security transmission system and method based on a multi-frequency phased array, relates to the technical field of wireless communication physical layer security, and aims to solve the eavesdropping risk caused by the fixed main lobe direction of the traditional directional beam forming technology.The application realizes the rotation of the beam around the target user by introducing a frequency offset increment in the multi-frequency phased array, combines a randomization technology of random reverse side lobes, designs an adaptive control algorithm for the eavesdroppers with known positions and unknown positions respectively, makes the target user keep a stable signal-to-noise ratio, and significantly reduces the signal-to-noise ratio of the eavesdroppers.The application effectively solves the interception and cracking problem caused by the broadcast characteristics of wireless signals, greatly improves the reliability and anti-eavesdropping ability of the physical layer security transmission, and is suitable for high-speed wireless communication scenes such as millimeter waves.

The application discloses a kind of arbitrary wavelength circularly polarized light generators and methods based on rotating wave plate.Any wavelength circularly polarized light generator based on rotating wave plate includes first wave plate and second wave plate;The first wave plate and the second wave plate are the optical device that can make the additional optical path difference or phase difference between the vibration of the incident light vibration direction perpendicular to each other;The first wave plate and the second wave plate, the phase delay under any working wavelength satisfies, wherein Φ 1 is the phase delay of the first wave plate, Φ 2 is the phase delay of the first wave plate.The application has simple structure, convenient operation, strong applicability and high reliability.