35 results about "Rotational wave" patented technology

The invention discloses a large-aperture plate glass stress birefringence surface imaging measurement method, belongs to the technical field of optical measurement, and aims to solve the technical problem of low glass stress birefringence measurement efficiency in the prior art. Comprising the following steps: moving a sample to be measured and a 1 / 4 wave plate out of a measuring light path, rotating a polarizer to find an extinction position, and rotating the polarizer by N angles nearby to obtain an angle # imgabs0 #; keeping the polarizer and the analyzer unchanged, moving the 1 / 4 wave plate into a measurement light path, rotating the 1 / 4 wave plate, and finding an extinction position; rotating the polarizer by N angles near the extinction position to obtain an angle # imgabs 1 #; the positions and the directions of the 1 / 4 wave plate and the polarization analyzer are kept unchanged, and the sample to be measured is moved into a measuring light path between the polarizer and the 1 / 4 wave plate; the polarizer is rotated through the polarization rotating mechanism, when the included angles between the polarizer and the x axis of the reference coordinate system are 0 degree, 60 degrees and 120 degrees respectively, the light intensities of the three images are obtained through the CCD camera, and the stress birefringence of the sample to be measured is obtained according to the three light intensities.

A method for acoustic logging a wellbore includes making a plurality of directional sonic logging measurements while rotating an acoustic logging tool in a wellbore. A plurality of orthogonal pairs of measurements are identified among the measurements. Each of the orthogonal pairs includes a first measurement having a measured angle of a transmitter firing direction that is perpendicular with a measured angle of a transmitter firing direction of a second measurement within a predetermined tolerance. A set of 4C component waveforms is compiled for each of the identified orthogonal pairs and mathematically rotated to align with predefined axes. Selected ones of the rotated waveforms are then stacked in the time domain.

The invention relates to the field of optics, and provides a device and a method for measuring an angle resolution polarization Raman spectrum. The angle resolution polarization Raman spectrum measuring device comprises a connecting mounting plate which is used for mounting the measuring device in a light path of a Raman spectrometer; the rotary mounting seat is fixed on the connecting mounting plate; the angle rotary table is arranged in the rotary mounting seat and is driven by the driving part to rotate; and the wave plate is mounted on the angle turntable and is used for changing the polarization directions of the incident laser and the Raman signal light through the wave plate. The angle resolution polarization Raman spectrum measuring device solves the problem of rotation and displacement of tiny samples, ensures in-situ and continuous measurement of small-size samples such as two-dimensional materials and nanoparticles, and compared with a traditional manual rotation wave plate mode, the angle setting error is reduced, the laser polarization direction is ensured to be adjusted according to preset precision, and the measurement accuracy is improved. And the high-resolution polarization measurement requirement is met.

The invention discloses a wave energy and ocean current energy integrated power generation device, and relates to the technical field of power generation devices. The power output end of the ocean current energy capturing mechanism is connected with the first rotating part to drive the first rotating part to rotate; the mechanical motion rectifying mechanism comprises a reciprocating lifting part, a rotary output part and a motion rectifying structure, and the motion rectifying structure is connected with the reciprocating lifting part and the rotary output part and can convert lifting bidirectional power of the reciprocating lifting part into rotary power of the rotary output part; the rotation output part is connected with the second rotation part and can drive the second rotation part to rotate in the direction opposite to the rotation direction of the first rotation part. And the floating output end of the wave energy capturing mechanism is connected with the reciprocating lifting part. The wave energy power generation device and the ocean current energy power generation device can be coupled together, the effect of adding the rotating speed of the power generator is achieved, and then the energy utilization rate is increased.

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.

A photoacoustic-ultrasonic dual-mode endoscope includes: a probe and a probe driving unit, wherein the probe includes: a coaxially configured optical and electromagnetic rotary waveguide assembly including an optical fiber, the optical fiber including a core and a cladding, and a conductive path coaxially arranged with the optical fiber; a scanning tip located at an end of the coaxially configured optical and electromagnetic rotary waveguide assembly and configured to deliver a laser beam to an object to be examined and detect a photoacoustic signal and an ultrasonic signal generated from the object to be examined; and a plastic catheter surrounding outer surfaces of the coaxially configured optical and electromagnetic rotary waveguide assembly and the scanning tip, wherein the conductive path includes: a first conductive path including a portion coaxially arranged with the optical fiber; and a second conductive path including a portion coaxially arranged with the optical fiber and insulated from the first conductive path.

The invention discloses a multi-mode man-machine interaction control method and system for an underwater robot, and relates to the technical field of man-machine interaction control, and the control method comprises the steps: extracting an instruction intention of a diver through an electromyographic signal and a tension sensing array; obtaining an energy distribution function of an angular rotating beam by combining a simulation modeling excitation model, and determining a circumferential energy flux through closed curve integration; performing spatial sampling on the transmitted angular rotation beam signal, calculating a sound pressure change value per unit area, and mapping the sound pressure change value to a piezoelectric dot matrix module of an underwater robot shell to construct a two-dimensional instruction response matrix; in an operation execution stage, sensing the capacitance change of a touch area, calculating a pressure intensity gradient vector, and fusing the pressure intensity gradient vector with an instruction response matrix to generate a tactile feedback tensor; and constructing an interaction evaluation model based on the tactile feedback tensor and the beam energy flux to judge whether the current multi-modal man-machine interaction process is valid, and generating and executing a corresponding interaction control instruction.

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 discloses a spectrograph light intensity correlation Mueller matrix four-element spectrum measurement method. According to the method, the relative intensity data [Iti, theta i] of light received by the ith pixel unit of the spectrometer CCD, which is obtained by a measuring device for the light intensity related Mueller matrix four-element spectrum of the spectrometer based on an angle scanning method, is substituted into a principle formula of the relative intensity of light received by the ith pixel unit of the spectrometer CCD. And traversing the range of [0, 2pi] where theta i is located, selecting four theta i values according to a certain rule, establishing an equation set with four Iti measured values corresponding to the four theta i values, solving and normalizing to obtain a Mueller matrix element related to the light intensity of the spectrograph corresponding to the wavelength lambda i. The measurement method is an external measurement method, and the spectrograph is not disassembled; all light intensity related Mueller matrix element spectrums are measured by adding a retardation curve of a 1 / 4 wave plate, and the method is not only suitable for a single spectrograph, but also suitable for a spectrograph system; the core optical device only uses the polarizer and the rotary 1 / 4 wave plate, the related hardware cost is low, and the method is simple and rapid; the environment adaptability is good.

A non-transitory computer readable medium having a computer program stored thereon causes a computer to perform a method for controlling a drilling system in a manner that reduces stick-slip including: receiving a desired rotation speed v0 of the drive system to rotate the drillstring, receiving property measurements of the drilling system, and deriving therefrom a rotation speed vup of upgoing rotational waves of the drillstring associated with upgoing rotational energy in the drillstring. An actual rotation speed v of the drive system to rotate the drillstring is determined by representing energy in the drillstring as a mathematical expression containing a sum of rotational energy produced by the drive system and downgoing rotational energy caused by the upgoing rotational waves that are reflected at an upper end of the drillstring, and then optimizing the mathematical expression, which is then used for controlling the drive system to rotate the drillstring at v.

A rotating waveguide carrying mechanism for microwave-assisted TBM rock breaking can provide safety protection for the carried rotating waveguide, and can effectively ensure the microwave transmission reliability and stability of the rotating waveguide. The first carrying sleeve of the carrying mechanism is coaxially fixedly connected with the second carrying sleeve, the third carrying sleeve is rotatably connected with the second carrying sleeve through a friction-reducing bearing, and the carrying support plate is fixedly arranged at the front end of the third carrying sleeve; the rotating waveguide is coaxially sleeved on the inner side of the carrying mechanism, the microwave receiving end of the rotating waveguide is used to access the microwave generating part of the microwave-assisted rock breaking equipment, and the microwave output end of the rotating waveguide is used to access the rock fracturing part of the microwave-assisted rock breaking equipment; a positioning card hole is opened in the center of the carrying support plate, and the microwave output end of the rotating waveguide is fixedly engaged with the positioning card hole in the center of the carrying support plate; the first carrying sleeve is fixedly connected to the TBM front shield through an adapter ear seat; the third carrying sleeve is fixedly connected to the TBM cutter head through an adapter ear seat.

This drive device comprises: an electric motor unit, which includes an electric motor, and an amplifier that supplies power to the electric motor. The amplifier comprises a number of electrical components mounted on a substrate. The amplifier is mounted coaxially to an end section of the electric motor unit in the direction of the electric motor's rotating shaft. The amplifier is designed so that it can be detached from the electric motor unit by operation of a worker.

The application discloses a kind of multimodal human-computer interaction control method and system for underwater robot, it is related to human-computer interaction control technical field, its control method steps include: the instruction intention of diver is extracted by myoelectric signal and tension perception array, and the energy distribution function of angular rotating beam is obtained by combining simulation modeling excitation model, ring energy flux is determined by closed curve integration;Angular rotating beam signal is spatially sampled, the sound pressure change value per unit area is calculated, and is mapped to underwater robot shell piezoelectric dot array module to construct two-dimensional instruction response matrix;In the operation execution phase, the capacitance change of touch area is perceived, the pressure gradient vector is calculated and is fused with instruction response matrix to generate haptic feedback tensor;Based on haptic feedback tensor and beam energy flux, an interactive evaluation model is constructed to determine whether the current multimodal human-computer interaction process is effective, generate corresponding interactive control instructions and execute.

The invention relates to the technical field of optical detection, and provides a secondary harmonic comprehensive detection system and a test method thereof, the secondary harmonic comprehensive detection system comprises a laser, a first reflector, a second reflector, a dichroic mirror, a Glan prism, an optical path correction device, an optical microscope, an optical filter, a signal detector and a displacement table; the laser generates femtosecond pulse laser and transmits the femtosecond pulse laser to the dichroic The dichroic mirror transmits the laser of a specified wave band and emits the laser to the Glan prism; the Glan prism enables polarized light in a specified polarization direction in the laser to pass through; the light path correction device adjusts the polarization direction of the laser and emits the adjusted laser to a sample on the optical microscope; light generated by the sample passes through the light path correction device and the Glan prism and is reflected to the light filter through the dichroic mirror to be filtered; and the light filtered by the optical filter is received by the signal detector. The polarization direction of light is adjusted by automatically rotating the wave plate, so that the test of various samples can be met, and the test accuracy is improved.

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.

The invention discloses a vital sign cooperative monitoring system based on a multi-frequency-band reconfigurable radar array, which breaks through the limitation of a fixed frequency band, adopts a 20-80GHz frequency-adjustable radar module on a horizontal layer, and integrates a rotatable waveguide structure and an MEMS phase array; 45-300GHz photon radars are deployed on a vertical layer, and continuous frequency modulation is realized by combining an optical comb generator. The system automatically matches a penetration mode (24GHz), a high-precision mode (60GHz) and a multi-target mode (77GHz) through a dynamic spectrum sensing and beam forming algorithm. Frequency band combination mathematical constraint conditions (fV / fH > = 1.5) are innovatively defined, and existing and future potential frequency band combinations are covered. Application scenes cover hospital metal environment penetration monitoring, old-age care community dense target separation and industrial high-humidity environment safety monitoring.

The present application relates to the technical field of harmonic speed reduction, in particular to a harmonic wave generator automatic cleaning device, which comprises an ultrasonic cleaner, a telescopic gripper, an electric control lifting support, a rotary drive mechanism, a suction clamping seat and a rotary seat, the ultrasonic cleaner is internally provided with a cleaning liquid, and the electric control lifting support is fixedly installed on the outer edge of the ultrasonic cleaner, the harmonic wave generator automatic cleaning device clamps the outer edge of the wave generator through the telescopic gripper, then drives the inner edge of the wave generator to rotate through the rotary drive mechanism, so that the inner and outer rings of the wave generator can rotate relatively, the dust at the gap of the wave generator can be in direct contact with the ultrasonic wave through this rotating mode, so that the dust at the gap can be discharged, and the device can avoid the entanglement of electric wires on the device in the case of using an electromagnet, and can realize that the inner and outer circles of the wave generator only rotate in one direction, thereby improving the cleaning effect on smaller wave generators.

The utility model relates to a laser polarization state control device, which is characterized in that a reflection unit is arranged on an output light path of a laser, a 1 / 2 wave plate, a beam splitter prism, a 1 / 4 wave plate and a galvanometer are sequentially arranged on a reflection light path of the reflection unit, and an output end of the galvanometer faces a workpiece on a carrying table; a power meter used for monitoring and recording the output power of the light splitting optical path of the first light splitting prism in real time is arranged beside the carrying table. The polarization state of the laser is adjusted to be circular polarization through the 1 / 4 wave plate, and the angle of the 1 / 4 wave plate is adjusted, so that the output laser beam is stable circular polarization light; the linear polarization state of laser is dynamically adjusted, a laser beam firstly passes through a 1 / 2 wave plate and then passes through a beam splitter prism, the power change is recorded by rotating the 1 / 2 wave plate and utilizing a power meter, the optimal states of P light and S light of linearly polarized light are determined, the P light is used when the X direction is cut, and the S light is switched when the Y direction is cut. And efficient generation and adjustment of circular polarization and linearly polarized light are realized.

The present invention discloses an adjustable dual-wavelength laser processing system, comprising a laser for emitting polarization-maintaining narrow-linewidth infrared laser light. A QBH fiber output head, a first collimating convex lens, a half-wave plate, a second focusing convex lens, a nonlinear crystal, a third collimating convex lens, and a dual-wavelength welding processing head are sequentially arranged along the transmission direction of the infrared laser light emitted by the laser. In the present invention, the deflection direction of the fundamental frequency light entering the nonlinear crystal can be changed by rotating the half-wave plate, thereby changing the frequency doubling efficiency generated by the nonlinear crystal and further adjusting the power ratio of the green light and infrared light in the laser light emitted from the nonlinear crystal. In the present invention, the fundamental frequency infrared laser and the frequency doubling green light are not separated; only one laser is required to generate laser light of two wavelengths, achieving dual-wavelength composite processing, greatly simplifying the dual-wavelength processing head structure and reducing production costs.

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 photoacoustic-ultrasonic dual-mode endoscope includes: a probe and a probe driving unit, the probe including: a coaxially configured optical and electromagnetic rotary waveguide assembly including an optical fiber, the optical fiber including a core and a cladding, and a conductive path coaxially arranged with the optical fiber; a scanning tip located at an end of the coaxially configured optical and electromagnetic rotary waveguide assembly and configured to deliver a laser beam to an object to be examined and detect a photoacoustic signal and an ultrasonic signal generated from the object; and a plastic catheter surrounding outer surfaces of the coaxially configured optical and electromagnetic rotary waveguide assembly and the scanning tip, wherein the conductive path includes: a first conductive path including a portion coaxially arranged with the optical fiber; and a second conductive path including a portion coaxially arranged with the optical fiber and insulated from the first conductive path.

The invention provides a sound wave regulation and control method and device, a terminal and a storage medium. The method comprises the following steps: constructing a waveguide array; the multi-frequency acoustic metamaterial device comprises a plurality of waveguides formed by acoustic metamaterial devices, the waveguide structure is formed by arranging a slowly-changing centrosymmetric rotatable structure, and the acoustic metamaterial devices can keep the transmissivity not smaller than a preset transmissivity threshold value under multiple frequencies and continuously regulate and control the transmission phase. According to the slowly-changing centrosymmetric rotatable structure, the area of the rotatable structure is increased to a preset area threshold value in an exponential mode and then decreased in an exponential mode; calculating transmission phase gradient distribution required by the waveguide array in the direction perpendicular to the incident wave according to the required wave control function; and determining a rotation angle required by the rotatable structure in the waveguide array according to the distribution, and rotating to the angle to realize a wave control function. By rotating the angle of the rotatable structure in the waveguide, the phase change within the range of 0-2 pi can be covered, and the transmission phase is continuously adjustable. Therefore, the required wave control function can be realized only by rotating the angle of the rotatable structure.

A harmonic reducer includes an outer shell, a circular spline, a flex spline, a wave generator, and an electric motor. The circular spline, flex spline, and wave generator are housed in the outer shell. The electric motor controls rotation of the wave generator around an axis of the harmonic reducer. The circular spline, the flex spline, and support body of the wave generator are made by injection molding of a plastic material. The circular spline consists of a first fixed circular spline and a second mobile or movable circular spline, integral with a user of the harmonic reducer, each having respective internal toothing. The wave generator has two groups of rotating bearings, arranged in diametrically opposite areas of the wave generator.

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.

A jewelry is provided, which is characterized in that polarizing plates are installed above and below a crystal jade, strong light is applied from the rear, the crystal jade is rotated to make a bull's eye (uniaxial optical axis) float on the surface of the crystal jade, and the bull's eye is changed into a left crystal (left helix) or a right crystal (right helix). 【Solution means】A space for inserting a quarter-wave plate is provided between the crystal jade and the upper and lower polarizing plates in a state where the bull's eye floats, and the bull's eye can be changed into a left crystal or a right crystal by a structure for inserting, attaching or rotating the quarter-wave plate.