255results about "Devices using optical means" patented technology

The invention relates to the technical field of industrial automation control, and particularly discloses a rotating speed detection and closed-loop control system based on photoelectric sensing and a PLC, and the system comprises at least one rotating body which is a rotating speed controlled object, and the surface of the rotating body is provided with a configurable number of reflection mark areas or speed measurement holes; the proximity photoelectric switches are in one-to-one correspondence with the rotating bodies, are aligned with the reflection mark areas or the speed measurement holes, and are used for detecting rotation information of the rotating bodies and generating original pulse signals; a high-speed counter input port of the PLC is electrically connected with signal output ends of the proximity photoelectric switches, and a pulse preprocessing module, a rotating speed calculation module, a deviation processing module, a control algorithm module and a signal adaptation module are arranged in the PLC. The PLC and the proximity photoelectric switch which are widely applied in the industrial field and high in popularity rate are adopted as core technical components, and expensive special servo controllers, encoders and other devices are not needed, so that the hardware purchase cost of the system is greatly reduced.

A wind estimation apparatus includes an acquisition unit and an estimation unit. The acquisition unit acquires a target image of a target region. The estimation unit estimates at least one of a direction and strength of wind in the target region by using the target image.

To provide a speed measurement device capable of easily measuring speed of an object in a non-contact manner.SOLUTION: A speed measurement device includes: a light source 11 for irradiating an object 1 with excitation light; a fluorescence detector 12 for detecting fluorescence generated in the object 1 irradiated with the excitation light; a relation preservation device 21 for preserving a relation between speed of the object 1 and intensity of the fluorescence generated in the object 1; and a speed calculation unit 22 for calculating speed of the object based on the intensity of the detected fluorescence and the relation.SELECTED DRAWING: Figure 1

The application discloses a train positioning and speed measuring system and method with meter-level resolution TGD-OFDR, which comprises a TGD-OFDR optical path, a signal acquisition and demodulation module, a noise reduction module and a positioning and speed measuring module connected in sequence; the TGD-OFDR optical path couples the probe light with the local reference light; the signal acquisition and demodulation module processes the received optical signal to obtain real phase data; the noise reduction module uses the STAWDA algorithm to dynamically analyze the time-space correlation of the signal and the noise, enhances the effective vibration signal and suppresses random noise and interference; the positioning and speed measuring module calculates the differential phase curve based on the phase data after noise reduction, and determines the train position and speed through the time difference of the vibration position. The application effectively improves the train positioning accuracy and speed real-time monitoring, can acquire and process signals in real time, meets the positioning and speed measuring application requirements of the train in the actual scene, and provides reliable support for real-time monitoring and long-distance track train safe operation in the train operation process.

The invention relates to a speed measuring device and method based on a spatial light modulator, and the device comprises a single-mode laser, a beam-expanding collimation module, the spatial light modulator, a 4F system, a projection convex lens, a receiving convex lens, and a photoelectric detector. The beam expanding and collimating module is used for receiving a laser beam output by the single-mode laser and emitting the laser beam to the spatial light modulator after beam expanding and collimating; the spatial light modulator diffracts incident light and generates first-order diffracted light with alternately dark and bright stripes; the 4F system receives the first-level diffraction light, filters the first-level diffraction light and outputs the filtered first-level diffraction light to The projection convex lens vertically irradiates the filtered first-order diffraction light to the surface of an object to be measured, and the stripe change direction of equidistant light and shade alternated stripes in the first-order diffraction light is consistent with the motion direction of the object to be measured; the photoelectric detector receives part of scattered light carrying the speed information of the to-be-measured object based on the receiving convex lens and converts the scattered light into an electric signal so as to calculate the speed of the to-be-measured object.

According to the present invention: a continuous sine wave signal is emitted toward an object serving as a target; a reflected wave comprising the sine wave signal reflected by the object is received; a frequency component of the sine wave signal that has been Doppler-shifted in accordance with the relative speed of a moving body and the object is extracted from the received reflected wave and output as a Doppler shift signal; a plurality of Doppler shift signals having a second duration are generated by cutting out, at a plurality of mutually different timings within a predetermined time period, a part of the Doppler shift signal having a predetermined first duration corresponding to the predetermined time period; a Doppler velocity for each of the Doppler shift signals having the first and second durations are calculated on the basis of the Doppler shift signals having the first and second durations; and the speed of the moving body in the current time period is determined on the basis of the calculated Doppler velocities of each of the Doppler shift signals having the first and second durations.

To detachably mount a portable information terminal to an adjustment target device.SOLUTION: A terminal holding tool has: a holding part 2 that detachably holds a portable information terminal 9 comprising a display part 91 that is used for adjustment and setting of an adjustment target device 84 when the adjustment target device 84 is installed; an insertion / removal part 3 that is inserted into or removed from a receiving part 6 provided on the adjustment target device 84 side; and a rotary connection part 5 interposed between the holding part 2 and the insertion / removal part 3.SELECTED DRAWING: Figure 1

The present invention provides a distance calculation device that can calculate distance information relating to the distance a workpiece travels. [Solution] The system comprises a light source 10 that emits light, a first optical system 20 that converts the light from the light source into elliptical polarization and emits it toward a workpiece W1 that is transparent and moving in a specific direction, a second optical system 30 that converts the light from the workpiece into linear polarization and emits it, and an optical sensor 40 that acquires optical information of the workpiece based on the light from the second optical system. The first optical system includes a first polarizing filter 22 that converts to linear polarization and a first waveplate 23 that converts the linear polarization from the first polarizing filter into elliptical polarization. The second optical system 30 includes a second waveplate 31 that converts the light from the workpiece and a second polarizing filter 32 that is placed between the second waveplate and the optical sensor 40 and converts the light from the second waveplate into linear polarization.

The utility model relates to the technical field of nondestructive testing, and discloses a metering device for measuring the rotating speed of a liquid metal sliding bearing, which comprises a driving motor, a shaft to be tested, the liquid metal sliding bearing, an acoustic emission sensor, a signal collector, a photoelectric rotating speed sensor and a monitoring computer, and is characterized in that the driving motor is in transmission fit with the shaft to be tested; a to-be-tested shaft is arranged on the liquid metal sliding bearing; the acoustic emission sensor is arranged on the outer side of the liquid metal sliding bearing; the signal collector is electrically connected with the acoustic emission sensor; the signal collector is electrically connected with the photoelectric rotating speed sensor; and the signal collector is electrically connected with the monitoring computer. The device has the effect of conveniently measuring and verifying the rotating speed of the liquid metal sliding bearing.

A spin-estimation system may include an image-capturing sensor positioned and configured to capture images of an object within a field of view of the image-capturing sensor. The spin-estimation system may be configured to perform one or more operations to analyze spin properties of the object. The operations may include setting an image capture framerate that corresponds to a minimum spin motion of the object, printing an orientation marker on an outer surface of the object, and capturing, by the image-capturing sensor at the set image capture framerate, images of the object after starting motion of the object. The operations may include isolating the object in each image to generate isolated object images. The operations may include generating an object marker segmentation map based on the isolated object images. A spin rate and a spin axis may be estimated based on the object marker segmentation map using deep learning approaches.

The utility model discloses a speed measuring device for the braking performance of a forklift, which belongs to the technical field of testing the braking performance of the forklift, and comprises a fixed bottom plate, a supporting stand column is connected onto the fixed bottom plate, one side of the supporting stand column is connected with a mounting plate, a rotating wheel is rotatably mounted on the supporting stand column, and a main bevel gear is connected onto the rotating wheel. According to the speed measuring device for the forklift braking performance, a driving motor is started to drive a first rotating rod to rotate, a first gear is meshed with a second gear, so that the first rotating rod and a second rotating rod rotate reversely, a supporting frame is driven to rotate, the distance between two rolling wheels is reduced, the rolling wheels lift a fixed bottom plate, and the speed is measured; according to the speed measuring device, the rolling wheels are arranged, so that a worker can conveniently push the speed measuring device to move through rolling of the rolling wheels so as to adapt to speed measuring work at different positions, the fixed bottom plate can make contact with the ground by enlarging the interval between the two rolling wheels, and therefore the fixed bottom plate is matched with the rolling wheels to support and position the speed measuring device.

This application provides a navigation method and device, a storage medium, a program product, and a vehicle, and relates to the field of navigation technologies. The navigation method includes: in a process in which a target device travels toward a first location point, obtaining a first speed at which the target device currently travels; determining a playing parameter of a navigation animation based on the first speed, where the navigation animation indicates a traveling path for the target device to reach the first location point, and the playing parameter indicates at least a playing speed of the navigation animation; and outputting the navigation animation in a visualized manner based on the playing parameter.

This invention relates to the field of angular velocity measurement technology, and discloses an anti-turbulent angular velocity measurement system and method based on partially coherent deep learning. The system includes: generating partially coherent light from an emitted laser and incident it onto a spatial light modulator; the emitted light then illuminates the surface of a rotating object through a turbulent environment; real-time acquisition of the light intensity image of the rotating object and its transmission to a partially coherent deep learning model to predict the turbulence phase expansion coefficient; generating a turbulence compensation phase based on the turbulence phase expansion coefficient and real-time loading it onto the spatial light modulator on the partially coherent light source surface to compensate the light source in real time; real-time acquisition of the compensated light intensity image of the rotating object; extraction of the light intensity time-domain signal to generate a corrected spectrum; extraction of the frequencies corresponding to the characteristic peaks in the corrected spectrum; and obtaining the rotational angular velocity of the rotating object according to the formula corresponding to the frequency and angular velocity. This invention enables high-precision angular velocity measurement of rotating objects in complex environments.

This invention discloses a method and apparatus for synchronously measuring the instantaneous angle and angular velocity of a rotating shaft, belonging to the field of optical measurement. The invention involves fixing an inclined plane mirror to the end face of the rotating shaft under test, and setting three measurement points on the mirror to form two mutually orthogonal measurement baselines. A laser beam is split into three probe beams to illuminate each measurement point, and the echoes are coupled to form a mixed interference signal. One optical path is equipped with an optical attenuator to generate identifiable interference components. The mixed interference signal is acquired, and multiple instantaneous frequency observations are extracted. Combining baseline parameters, mirror tilt angle, initial installation phase, and laser wavelength parameters, the instantaneous rotation angle and angular velocity at the current moment are synchronously calculated. This invention provides two sets of independent frequency observations through orthogonal dual baselines, achieving synchronous calculation at a single moment without the need for external initial values ​​or phase integration. It has advantages such as non-contact operation, high dynamics, and resistance to cumulative errors, and is suitable for non-contact dynamic measurement of rotating shafts, precision turntables, robot joints, and high-speed spindles.

A movement prediction apparatus including first and second light output devices, a light reception device, and a processor. The first light output device outputs output-light having a spectral component of a first optical frequency comb of which a frequency comb interval is a first interval. The second light output device outputs reference light having a spectral component of a second optical frequency comb of which a frequency comb interval is a second interval. The light reception device receives combination light that is a combination of the output-light, reflection light that is the output-light reflected by a flying object rotor wing, and the reference light, and measures a distance to the rotor wing based on the combination light. The processor calculates a rotation amount that represents a rotational speed of the rotor wing based on a change amount of the measured distance, and predicts a movement of the flying object.

The invention discloses a laser speed measuring device. According to the laser speed measurement device, a photoelectric cathode is connected with a micro-channel plate through a vacuum bonding technology, and the photoelectric cathode is used for converting a laser signal into a photoelectronic signal and transmitting the photoelectronic signal to the micro-channel plate; the micro-channel plate is connected with the fluorescent screen through a vacuum bonding technology, and the micro-channel plate is used for carrying out electron multiplication processing on the photoelectron signals and transmitting enhanced electronic signals to the fluorescent screen; the fluorescent screen is connected with the nano optical fiber taper coupling structure through a vacuum bonding technology, and the fluorescent screen is used for sending a visible light signal to the nano optical fiber taper coupling structure; the nano optical fiber taper coupling structure is connected with the CCD chip, and the nano optical fiber taper coupling structure is used for transmitting the visible light signal to the CCD chip; the CCD chip is used for receiving the visible light signal, converting the visible light signal into a digital signal and transmitting the digital signal to the control module so as to determine speed data of the laser signal according to the digital signal. According to the invention, the transmission efficiency of the laser signal is improved, and the determination precision of the speed data of the laser signal is improved.

The application discloses an engine rotor multi-parameter measurement system and method, and the system comprises a first optical comb, a second optical comb, a polarization maintaining optical fiber amplifier, a polarization maintaining optical fiber beam splitter, an integrated polarization maintaining optical fiber ring, an integrated polarization maintaining optical fiber beam combiner, a plurality of high-temperature-resistant optical fiber probes, a high-speed photoelectric detector and a data acquisition and processing system; the pulse repetition frequency of the first optical comb is greater than that of the second optical comb, and the two have a high repetition frequency difference; the plurality of high-temperature-resistant optical fiber probes respectively generate reference light pulses and measurement light pulses; the scanning light pulses emitted by the second optical comb respectively interfere with the plurality of reference light pulses and the plurality of measurement light pulses to generate double-comb interference reference signals and double-comb interference measurement signals; through processing of the reference signals and the measurement signals of each channel, the engine rotor speed, the blade tip clearance, the blade tip timing and the blade vibration parameters are obtained. The application has the advantages of high measurement speed, high measurement accuracy and multi-parameter synchronous measurement.

Various embodiments described herein may include a laser rangefinder or another mobile optical device, the laser rangefinder or the other mobile optical device including: an integrated display, or an external interface to couple to another display; a line-of-sight communication interface capable of communication with a remote system when at least one optical receiver of the line-of-sight communication interface has line of sight to a light-transmission module of the remote system; processing circuity to, in response to the at least one optical receiver capturing light transmitted over-the-air from the light-transmission module: recover one or more values bases on the captured light; and present the one or more values, or information derived therefrom, using the integrated display, or transmit a signal representing the recovered one or more values, or the information derived therefrom, over the external interface. Other embodiments may be disclosed and / or claimed.

The invention is entitled "System and method for optical measurement in a rotating machine." The invention provides a system having a measurement system (27) with a sensor mount (82), a light source (16), a light sensor (18), and a controller (14) coupled to the light source (16) and the light sensor (18). The controller (14) is configured to determine a clearance between a rotor (46) and a housing (48) based at least in part on an interruption of light (120) emitted from the light source (16) to the light sensor (18).

The application provides a kind of multi-core optical fiber based rotating object rotational speed measurement method and system, the method is by generating the detection light field with specific spatial structure, transmission through multi-core optical fiber and phase modulation obtains the preset structure of the exit light field;The light field is used to irradiate the rotating object, receive the reflected signal and return through the same path, detect the signal intensity change to obtain the time domain signal;Frequency shift information is obtained by frequency domain analysis and the angular velocity is calculated.The method realizes the flexible regulation and control of the light field multi-degree of freedom by the combination of spatial light modulator and multi-core optical fiber, breaks through the limitation of insufficient existing regulation and control degree of freedom;The requirement for optical axis alignment accuracy is reduced by using structured light field;The system miniaturization is realized by using flexible multi-core optical fiber, and the problem of narrow space application is solved;The parallel transmission and anti-interference characteristics of multi-core optical fiber are fully utilized, and the measurement stability and precision in complex environment are significantly improved by digital phase conjugation and transceiver integrated design.

The application provides an eccentric mill grinding disc rotation speed measurement method based on revolution phase synchronous sampling, belongs to the technical field of rotation speed measurement, and has the advantages that the revolution phase of a mill main shaft is locked in the time domain, the revolution component in a collected grinding disc image sequence is displayed as a static component, effective separation of the revolution and rotation movement components is realized, and then the rotation speed of the grinding disc is accurately calculated; meanwhile, the method adopts a non-contact measurement form, is suitable for the industrial working environment of the eccentric mill, has good universality, and can be popularized to rotation speed measurement of other rotating components with superimposed revolution and rotation movement; the method realizes non-contact rotation speed measurement through an industrial stroboscopic light source, an industrial camera and a visual marker pattern, avoids problems that a contact type component is prone to failure and difficult to install in the working environment of the eccentric mill with high-speed rotation, serious dust and violent vibration, and does not interfere with the normal movement of the grinding disc, so that the equipment adaptability and environmental tolerance are high.

Systems and methods for drone detection via the extraction of related propeller signature using a high performance camera.

The invention discloses a shellfish larva vitality measuring device, and relates to the field of marine bivalve shellfish larva behavioristics, a measuring device is arranged in a heat preservation device, swimming tracks and swimming speeds of shellfish larvae in different temperature environments are simulated through the heat preservation device, and the measuring device comprises a measuring chamber, a camera and a measuring scale, a measuring ruler is arranged on the inner side wall of the measuring chamber, the camera faces the measuring chamber and is arranged on the opposite side of the measuring ruler, the camera records the motion trail of the shellfish larvae in the measuring chamber in the background of the measuring ruler, and the clearness of the motion trail of the shellfish larvae in the video is increased through irradiation of the light source. The swimming speed of the shellfish larvae is calculated by combining a measuring scale in a video, so that the accuracy of shellfish larva vitality evaluation is improved; meanwhile, the invention further discloses a determination method applying the shellfish larva vitality determination device, and the vitality strength of the shellfish larvae under the actual condition is judged.

The invention relates to the technical field of piano playing action analysis, and discloses a piano concert practice matching and analysis method, device and equipment and a storage medium. Physical energy input reflected by hammer impact speed is used as a force anchor point without depending on an audio signal; the motion organization reflected by the hand posture is used as a disambiguation basis, rhythm robust re-parameterization is realized by utilizing an accumulated energy progress axis, and matching and alignment models of energy and motion gating, monotonous alignment constraint and physical consistency constraint are introduced in a matched manner, so that the matching and alignment stability of exercise segments under the mute exercise condition is remarkably improved, and the exercise efficiency is improved. And meanwhile, a concert practice analysis result with interpretability on force organization and action organization can be output. Therefore, through scientific quantification of the playing technique, the problems that in a mute practice scene, a traditional method cannot reliably complete matching and alignment of the concerted practice units, and it is difficult to output a force and action concerted technique analysis result are solved.

To provide a speed calculation device and a speed calculation method for more accurately measuring speed of a movable body in comparison to a case when a composition of this invention is not provided.SOLUTION: A speed calculation device includes: an overhead wiring position calculation unit 111 for acquiring a first position which is a position of an object with a rail 102 as a reference in a position separated from a sensing unit 108 by a first distance from measured result by the sensing unit 108 installed on a vehicle 101 moving on the rail 102 by measuring the distance from the object such as trolley wire 103 or catenary wire 104 and a second position which is the position of the object with the rail 102 as the reference in a position separated from the sensing unit 108 by a second distance; and an estimated speed determination unit 114 for calculating the speed of the vehicle 101 based on difference from the first distance to the second distance and difference in time where the first position and the second position match.SELECTED DRAWING: Figure 1

The utility model belongs to the technical field of photoelectric encoders, and discloses a rotation protection structure of a photoelectric encoder, which comprises an electric encoder, the electric encoder is arranged above the ground, one side of the electric encoder is provided with a rotating shaft and a connecting assembly, and the connecting assembly is arranged on one side of the electric encoder. The connecting assembly comprises a first clamping block, a protective sleeve, a first clamping groove and second clamping grooves, one side of the first clamping block is fixedly connected with one side of the electric encoder, the upper side and the lower side of the wall face of the second spring are elastically connected with one side of one second clamping block respectively, and the first clamping groove is formed in the side, opposite to the electric encoder, of the protective sleeve. The first clamping block is matched with the first clamping groove and can be clamped with the two abutting blocks to press the two second clamping blocks, the second clamping blocks come out of the corresponding second clamping grooves, then the first clamping block is taken out of the first clamping groove to achieve quick disassembly, and the protective sleeve is convenient for protecting the electric encoder from external physical interference during rotation. Disassembly is convenient, and frequent inspection and maintenance can be achieved.

The application relates to the field of laser speed measurement, and provides a laser rotating speed measurement device and method and an electronic device. The device comprises: a code disc, which is in a ring structure, is sleeved on a rotating device to be measured, and is coaxially arranged with the rotating device to be measured; a laser rotating speed sensor, which is arranged outside the code disc and is spaced apart from the code disc by a certain distance; the code disc comprises a first half region and a second half region; the laser rotating speed sensor is used for emitting laser to the code disc, receiving reflected laser of the code disc, and determining rotating speed and rotating direction of the code disc based on the reflected laser, wherein the rotating speed of the code disc represents rotating speed of the rotating device to be measured, and the rotating direction of the code disc represents the rotating direction of the rotating device to be measured. The scheme is used to solve the defect that related technologies cannot measure the rotating direction of an object, and the rotating direction is judged through the difference between reflected light of two code discs.

The embodiment of the invention provides a window cleaning robot speed detection method and a related device, and relates to the technical field of cleaning. The method comprises: acquiring a pulse signal of a detection sensor; the detection sensor comprises a single-phase Hall sensor and / or a single-phase photoelectric sensor; determining a pulse number increment in unit time according to the pulse signal; and determining the speed of the window-cleaning robot according to the pulse number increment and a preset reduction ratio of a motor of the window-cleaning robot. According to the scheme, the pulse signal output by the single-phase Hall sensor and / or the single-phase photoelectric sensor is utilized, and the pulse frequency calculation of the time window is combined, so that the high-precision and high-reliability detection of the speed of the window-cleaning robot is realized. And the cost of the window cleaning robot and the complexity of the system are effectively reduced.

Rotating structure (4) for civil applications, comprising - a fixed part (8) and a movable part (12) which rotates about an axis of rotation (XX) and is equipped with drive means (16) for its rotation about the axis of rotation (XX), - wherein the fixed part (8) and the movable part (12) are coaxial with respect to the axis of rotation (XX), - wherein the drive means (16) are arranged on an outer diameter of the movable part (12) antipodal to the axis of rotation (XX), - wherein the fixed part (8) and the movable part (12) are connected to each other at an inner circular interface (20), corresponding to an inner diameter on the side of the axis of rotation (XX), and at an outer circular interface (24), corresponding to an outer diameter, opposite the inner diameter along a radial direction (RR) perpendicular to and intersecting the axis of rotation (XX), - wherein the rotating structure (4) comprises a first position band (28) with indices and at least one first position encoder (32) configured for optical reading of the first position band (28) in order to provide a measurement of the angular position of the moving part (12), or encoder - wherein the rotating structure (4) comprises a first velocity band (36) with indices and at least one first velocity encoder (40) configured for optical reading of the first velocity band (36) in order to provide a measurement of the angular velocity of the moving part (12), - wherein the first position band (28) and the first position transmitter (32) are arranged according to the inner circular interface (20), - wherein the first speed band (36) and the first speed sensor (40) are arranged according to the outer circular interface (24), - wherein the first speed sensor (40) and the first position sensor (32) are functionally connected to the drive means (16) to enable feedback control of the drive of the drive means (16).

The utility model relates to the technical field of speed detection and induction, and discloses an infrared photoelectric speed detection and induction device which comprises a speed detection inductor body, a spring device, a protective heat dissipation device composed of a heat dissipation cover and a rotating piece, and an installation base composed of a bottom plate and a magnet block. A protective heat dissipation device is arranged outside the speed detection inductor body, the side wall of the protective heat dissipation device is of an opening structure, a mounting base is arranged at the bottom of the protective heat dissipation device, and a spring device is arranged between the mounting base and the protective heat dissipation device; according to the infrared photoelectric speed detection induction device, the speed detection inductor body is sleeved with the protection heat dissipation device, the overall heat dissipation efficiency is improved, the detection work efficiency is improved, meanwhile, the infrared photoelectric speed detection induction device is convenient to install and adjust, and the overall practicability is improved.