107results about "Devices using time traversed" patented technology

Provided is a monitoring system that includes: a detection position acquisition means that acquires a first detection position at which vibration was detected at a first optical fiber cable and a second detection position at which vibration was detected at a second optical fiber cable that is spaced at an interval from the first optical fiber cable; and a crossing angle estimation means that estimates the crossing angle at which a mobile body has crossed the first optical fiber cable and the second optical fiber cable on the basis of the first detection position and the second detection position.

The application provides a conveyor speed detection method, device and equipment based on a dual-antenna RFID. The method comprises: tracking and processing an RFID tag by using a first antenna, and recording a first phase sequence of the RFID tag; tracking and processing the RFID tag by using a second antenna, and recording a second phase sequence of the RFID tag; determining a phase difference between the first phase sequence and the second phase sequence, and determining a phase difference speed according to the phase difference; determining a Doppler speed according to movement data of the RFID tag; fusing the phase difference speed and the Doppler speed by using a Kalman algorithm, determining a final conveyor belt speed, and outputting the final conveyor belt speed. The phase difference speed is determined according to the phase difference between the phase sequences of the two antennas. The Doppler speed is also determined. The phase difference speed and the Doppler speed are fused by using the Kalman algorithm, and the final conveyor belt speed is determined, so that the conveyor belt speed is accurately detected with high precision.

The invention discloses a crawler excavator driving speed and driving linearity detection system and method, and the system comprises a target plate group, a laser displacement sensor, a microcontroller MCU and a Phyphox mobile phone terminal special test software, the target plate group comprises target plates A, B and C which are sequentially arranged along a preset driving route, the center lines of the three target plates are collinear and are parallel to the initial advancing direction of the excavator; the detection axis of the laser displacement sensor is orthogonal to the advancing direction of the excavator, and the horizontal distance between the excavator and the target plate is collected in real time; the MCU is used for acquisition, preprocessing, operation and data communication of signals of the laser displacement sensor; the Phyphox mobile phone end special test software establishes communication with the microcontroller MCU through Bluetooth to process detection data, synchronous detection of the driving speed and linearity is achieved, and the test efficiency is improved; whether the excavator is in a constant-speed driving state on a test road section or not is accurately judged, and the requirement that the driving speed of the excavator in a test area is constant is met.

The invention discloses a sorting mistake-proofing method and device for a multi-layer printed circuit board (PCB) lamination, a medium and a product, and relates to the technical field of automatic production. The method comprises the following steps: acquiring a surface image of a circuit board to be stacked; the identification code is analyzed from the surface image, and the current moment is recorded; calling a matched preset stacking formula, and obtaining a dynamic time threshold value associated with the product model information; comparing the layer information with target layer information in a preset stacking formula to obtain a layer matching judgment result; acquiring a thickness value of a medium in the preset scanning area; calculating a time interval, comparing the time interval and the thickness value with a dynamic time threshold value and a preset thickness threshold value respectively, and generating a partition paper placement judgment result; according to the layer matching judgment result and the partition paper placement judgment result, a control instruction is generated; and carrying out stacking operation or stopping operation according to the control instruction. By implementing the technical scheme provided by the invention, the final qualification rate and reliability of the product can be effectively improved.

Systems and methods for analyzing laser beam characteristics in high-speed laser motion systems, wherein the characteristics include laser travel speed, velocity, and acceleration, wherein the high-speed laser motion systems comprise a laser for generating a laser beam, comprising determining a location of the first pin-hole sensor within the predetermined field of view; determining a location of the second pin-hole sensor within the predetermined field of view; defining a travel distance of the laser beam; measuring the amount of time to travel from the location of the first pin-hole sensor to the location of the second pin-hole sensor; and dividing the travel distance by the amount of time to travel from the location of the first pin-hole sensor to the location of the second pin-hole sensor to calculate the velocity of the laser beam between the first pin-hole sensor and the second pin-hole sensor.

The invention belongs to a method for testing the rotating speed of a flying projectile in the field of non-sitting force guns, which comprises the following steps of: photographing and capturing the flying projectile by using a high-speed camera at a specified station on one side of a ballistic trajectory, recording the starting time and the ending time by using marks on the surface of the projectile, and calculating the average rotating speed of the projectile at a certain point when the projectile flies; the system is composed of an emplacement (1), a flying projectile (3) and a high-speed camera (2). According to the method, after an artillery on a gun position (1) shoots ammunition, a flying projectile (3) appears on a trajectory trajectory, a high-speed camera (2) shoots the movement condition of the projectile in a view field and stores the movement condition, and then the time when a marking line is located on the axis of a projectile shaft after the projectile enters the view field and before the projectile leaves the view field is checked and recorded as T0 and T1 respectively, according to the time interval from T0 to T1 of the projectile, the number of turns of the projectile rotating in the interval can be read, and according to the number of turns of the projectile rotating and the time, the flight rotating speed of the projectile can be obtained through calculation.

Disclosed are method and electronic components for: i) electronically extracting a sequence of values from a measurement signal corresponding to a position of a moving object, wherein the sequence of values indicates the position of the moving object at corresponding time increments; ii) electronically determining at least one of an estimate for a velocity of the moving object and an estimate for an acceleration of the moving the object based on a plurality of the values in the sequence of values; and iii) electronically correcting a value in the sequence of values to substantially reduce the effect of processing and signal delays based on one or both of the velocity and acceleration estimates.

The invention relates to a small-load pneumatic ejection separation test platform and a speed projection engineering estimation method. The test platform is composed of an air compressor, a high-pressure gas cylinder, an electromagnetic valve, a pressure gauge, a mounting rack, an ejection cylinder, a piston, a high-speed camera, a grid background plate, an irradiation lamp, a protection pad and other components. The air compressor is used for providing high-pressure gas required by the ejection system; the high-pressure gas cylinder is used for storing high-pressure gas required by system ejection; the electromagnetic valve is used for controlling the ejection device to start; the pressure gauge is used for measuring gas pressure in the gas cylinder; the ejection cylinder is used for providing a space required by high-pressure gas expansion and a track required by object ejection; the piston is used for converting aerodynamic force into thrust to provide acceleration for a separated object; the grid background plate is used for determining the position of the isolate shadow; and the irradiation lamp is used for irradiating the separated object and projecting a shadow on the square background plate. The device has the advantages of being safe in experiment, easy to install, convenient to recycle, convenient to maintain and capable of repeating the experiment.

The invention discloses a speed measurement system and method for linear impact, and the system comprises a displacement detection module, a data processing module and a central processing module, and the displacement detection module is used for detecting the real-time displacement of a moving object in the process of moving towards an impact test object. The data processing module is used for determining a preset speed measurement interval according to a preset speed measurement position point and a preset speed measurement length, and generating a pulse signal and outputting the number of pulses according to the real-time displacement when the moving object is within the range of the preset speed measurement interval; the moving time of the moving object in the preset speed measurement interval is calculated, and the average speed of the moving object in the preset speed measurement interval is calculated according to the moving time and the preset speed measurement length and serves as the moving speed of the preset speed measurement position point. According to the invention, the speed of the moving object at different speed measurement points and speed measurement lengths in the moving process is detected, and the flexibility, convenience and accuracy of the impact test are improved.

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 invention relates to a calibration device (10) intended to be coupled to a laser velocimeter (VL) comprising: a disk (D), a mirror (M) fixed to the disk, a first illumination / reception device (DIR1) configured to receive a first light signal (S1) at a first frequency, orient and focus the first light signal so as to form a first incident signal illuminating the surface of the mirror at an incidence normal to a position of the disk during a passage of the disk, and according to a determined diameter on said surface, recover a first reflected signal (SR1) by the mirror at a frequency shifted relative to the first frequency of a Doppler shift (Δf), said calibration device being further configured to provide at output, at least a fraction of said first reflected signal and a value of a first standard tangential velocity (vte1) determined from said angular velocity (ω) and said measurement radius (Rm),intended for calibrating the laser velocimeter (LV). Figure 1,

The present application relates to a kind of vehicle speed detection methods based on outer pole face image, belong to the field of automatic driving.The method includes: S1: periodically capture the image of the road in front of vehicle, obtain time-space distance image;S2: the curve cluster surface of the time-space distance image obtained is divided into several parts;S3: the curve corresponding to each part obtained;S4: by its analytic differential, the speed curve of each part is obtained;S5: the generation of full interval speed curve, according to the displacement of feature point, the speed of vehicle is calculated.The present application is based on the principle of visual kinematics, using the image obtained by vehicle-mounted camera and distance sensor, the speed of vehicle is calculated by observing the motion of feature point in image.Compared with the existing speed detection method based on physical sensor, the method is lower in cost, but the principle is simple, and the accuracy is also higher.The method can be used alone, can also be combined with the data of other sensors, improve detection accuracy and stability.

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.‎

To provide a firearm analysis device to determine a parameter showing a firearm from a shot released from a weapon, a corresponding method, a corresponding firearm and a computer program product.SOLUTION: This device comprises a voltage generation unit generating AC voltage (Ue) during a reverse reaction movement and / or a reaction movement of a movable weapon part generated in shooting. This device comprises a signal processing unit generating a measurement signal (IN+) from the generated AC voltage (Ue), a signal evaluation unit determining a first point of time and a second point of time during the reverse reaction movement and / or the reaction movement of the movable weapon part and a time determination unit determining a time cycle period between the first point of time and the second point of time.SELECTED DRAWING: Figure 1

There is described a device (10) for detecting the speed (v) and length (L) of a bellows (2) moving along a processing path (P), the device being provided with: a camera (11) arranged, in use, in a position facing the bellows (2) and at a non-zero distance from the bellows (2) and configured to take an image of at least a longitudinal portion of the bellows (2); and a control module (13) connected to the camera (11) and configured to calculate a feed speed (v) of the bellows (2) and a length (L) of the bellows (2) based on the image detected by the camera (11).

A method, system, and apparatus for determining the location of a tool traveling down a wellbore by measuring a first borehole magnetic anomaly with respect to time at two known locations on a tool, comparing the time difference between the two measurements, then calculating the velocity of the tool based on the comparison, then further calculating the distance traveled by the tool in the wellbore based on the velocity calculation, then executing a series of commands at a predetermined location in the wellbore.

Provided is a tangible, non-transitory, machine readable medium storing instructions that when executed by the processor effectuates operations including: capturing visual readings to objects within an environment; capturing readings of wheel rotation; capturing readings of a driving surface; capturing distances to obstacles; determining displacement of the robotic device in two dimensions based on sensor readings of the driving surface; estimating, with the processor, a corrected position of the robotic device to replace a last known position of the robotic device; determining a most feasible element in an ensemble based on the visual readings; and determining a most feasible position of the robotic device as the corrected position based on the most feasible element in the ensemble and the visual readings.

The present invention discloses a speed measurement method and device for electromagnetic non-contact online length measurement of steel wire. Axial excitation devices and internal pass-through type magnetic detection sensors are arranged sequentially at intervals in the direction of the steel wire travel. The axial excitation device is excited with a narrow pulse voltage, and the inner-passing type magnetic detection sensor detects the wire circumference. The residual magnetism in the range is detected in real time, and when the magnetic zero point is detected, the control system Send a pulse excitation trigger command to start the next excitation and detection process and obtain the length measurement. The value is increased by a value corresponding to one length measurement pitch, and this is repeated until excitation is terminated. The present invention is a method for detecting the residual magnetism caused by the difference in the strength of the residual magnetism due to the change in the diameter or material of the steel wire to be detected. It solves the problem of deviation caused by wire deflection and signal instability caused by wire deflection, and allows for the use of thinner steel wires. Enables line detection and ensures correct pulse-to-pulse measurement through the traditional instrument calibration and debug process. By setting the interval length, highly accurate length measurement can be achieved.

The inspection method acquires the number of target pulses indicating the number of pulses output from a sensor during a predetermined reference distance of the vehicle, that is, the number of pulses corresponding to the rotation of the wheels of the vehicle, and compares the acquired number of target pulses with a predetermined reference pulse number to determine the rotation of the wheels of the vehicle. Thus, an abnormality related to the vehicle speed of the vehicle is determined.

This invention discloses a method, measuring device, and storage medium for measuring the speed of an object conveyed by a belt conveyor. The method includes: capturing images of a conveyor belt with laser lines using two cameras; matching the images captured by the two cameras to obtain the depth of the object containing the laser lines; calculating an evenly spaced object thickness distribution based on the obtained depth of the object containing the laser lines; obtaining the displacement of the object on the conveyor belt between two consecutive frames based on the evenly spaced object thickness distribution; and calculating the object's velocity based on the obtained displacement between the two consecutive frames. This invention obtains the evenly spaced object thickness distribution by interpolating the depth of the object containing the laser lines and accurately extracts the belt conveyor speed information using a cross-correlation algorithm, achieving direct measurement of the conveyor belt speed and ensuring high measurement accuracy.

To provide a dehydration treatment system that can automate overall control by automatically determining whether or not sludge before dehydration is suitable for dehydration, by simple processing.SOLUTION: A dehydration treatment system 1 includes a coagulation tank 23, a concentration device 3, a speed measurement device 4, a determination device 61, and a dehydration device 5. The coagulation tank 23 is supplied with sludge and a coagulant, thereby producing coagulated floc CF in which sludge is coagulated. The concentration device 3 causes the coagulated floc CF to flow down and concentrate the coagulated floc CF. The speed measurement device 4 measures a flow speed of the coagulated floc CF flowing down the concentration device 3. The determination device 61 determines that the coagulated floc CF is suitable for dehydration if the flow speed of the floc CF measured by the speed measurement device 4 is equal to or lower than a concentration reference value. The dehydration device 5 dehydrates the coagulated floc CF.SELECTED DRAWING: Figure 2

A yo-yo has at least one sensor configured to measure a parameter related to movement of the yo-yo, a transmitter configured to transmit the measured parameter to the computing device. A processor is configured to determine a position of the yo-yo relative to a reference device based on signals transmitted between the yo-yo and the reference device. A server is configured to determine a trick performed with the yo-yo based on the measured parameter, and to communicate the determination to one or more computing devices of different players.

The invention belongs to the technical field of unmanned aerial vehicle control. The unmanned aerial vehicle autonomous tracking method based on monocular vision comprises the steps of obtaining a target unmanned aerial vehicle image shot by a monocular camera of a tracking unmanned aerial vehicle, and determining a three-dimensional space coordinate and a current relative speed of the target unmanned aerial vehicle according to the target unmanned aerial vehicle image; calculating an image error vector according to the three-dimensional space coordinates; according to the three-dimensional space coordinates and the current relative speed, a Kalman filtering algorithm is adopted to optimize the current relative speed, the optimized current relative speed is obtained, and a position error vector is determined according to the optimized current relative speed; and according to the image error vector and the position error vector, determining a fusion control input vector, and according to the fusion control input vector and the current relative speed, determining an updated relative speed for tracking the unmanned aerial vehicle. According to the invention, the control precision of autonomous tracking of the unmanned aerial vehicle is greatly improved.

The invention relates to the technical field of testing machine metering, in particular to a metering device for the moving speed of a testing machine beam. The device comprises a base, a fixed ruler, a sliding ruler, a magnetic base and a single-chip microcomputer system integrated in the sliding ruler. And the magnetic base is used for adsorbing and fixing the sliding ruler on a movable cross beam of a testing machine. When the cross beam moves, the sliding ruler is driven to move relative to the fixed ruler, and the displacement sensor integrated in the sliding ruler detects displacement in real time and generates an electric signal. The single-chip microcomputer system starts to continuously collect displacement and time data after receiving a user starting instruction, and calculates and displays the moving speed of the cross beam in real time according to the ratio of the displacement variable quantity to the time. Displacement measurement and time measurement are integrated, automatic, accurate and real-time measurement of the moving speed of the cross beam is achieved, manual operation errors are effectively avoided, and the metering efficiency and the result reliability are remarkably improved.

The invention relates to the technical field of industrial automation control, in particular to a conveying line speed measuring system and method based on double photoelectric sensors, and the system comprises the double photoelectric sensors and a data processing unit, the double photoelectric sensors are used for detecting passing states of goods on the conveying line and outputting pulse signals; the data processing unit is used for capturing the time difference of the pulse signals output by the double photoelectric sensors and calculating the real-time speed of the conveying line. According to the method, two photoelectric sensors are installed in the running direction of a conveying line at a fixed interval, and a detection area is formed; when the goods pass through the two photoelectric sensors, respectively detecting time points when the goods pass through each sensor; and the time difference between the two time points is calculated, the real-time running speed of the conveying line is calculated, and the real-time running speed is output to the automatic equipment. According to the invention, a non-contact real-time on-line speed measurement function is realized, and measurement errors caused by slipping and material accumulation can be eliminated.

The invention discloses a speed measurement method and device, and the method comprises the steps: obtaining a frame of image generated by a plane imaging device for an object to be subjected to speed measurement, and the image comprises the object to be subjected to speed measurement; and determining the speed of the object to be subjected to speed measurement in any one-dimensional or multi-dimensional direction based on the deformation quantity of the marker in the image, the deformation quantity of the marker being determined based on the original shape of the marker and the imaging shape of the marker in the image. According to the method, the speed of the to-be-measured object in any one-dimensional direction in the three-dimensional direction can be determined based on the deformation quantity of the marker in the single-frame image, and measurement through multiple frames is not needed, so that the real-time performance of speed measurement is improved.

The embodiment of the invention relates to the technical field of pipe cleaner monitoring, and provides a method and a system for monitoring the speed of a pipe cleaner in an oil and gas pipeline, which are used for tracking the position of the pipe cleaner in real time through a rayleigh scattering signal of laser based on distributed vibration sensing. And the speed of the pipe cleaner is monitored in real time based on the corresponding relation between each pipeline monitoring unit in the oil and gas pipeline and each sensing interval in the sensing optical fiber, so that the response is sensitive, the positioning is accurate, the trajectory tracking and speed monitoring of various pipe cleaners can be realized, the positioning precision and speed monitoring precision of the pipe cleaner can be effectively improved, and the working efficiency is improved. And the positioning and speed monitoring cost is reduced.

The invention provides a camera speed measurement method and a related device. The method comprises the following steps: determining external parameters of a target camera; acquiring multiple frames of first ground images from an image acquisition module; determining feature point position information according to the multiple frames of first ground images and the external parameters; determining a first transverse and longitudinal moving distance of the target vehicle according to the feature point position information; and determining the target vehicle speed of the target vehicle according to the first moving distance and the image acquisition time. Through the CMS camera lens, the ground static feature points are extracted, the feature point position information is determined through the camera external parameters and the matched feature points, the transverse and longitudinal movement distances of the vehicle are measured, the vehicle speed is further determined, the vehicle speed can be obtained through the CMS camera equipment, and the accuracy of obtaining the vehicle speed by the camera is improved.

A stroke average speed calibration device of a compressed tea pressing machine comprises the compressed tea pressing machine, two guide rails are transversely, parallelly, detachably and fixedly installed on a working table of the compressed tea pressing machine, and a vertical sliding groove is formed in the position, close to the side edge of the working table, of each guide rail. At least two sensor fixing frames capable of adjusting the fixing positions up and down are installed between the two vertical sliding grooves, and each sensor fixing frame is provided with a laser speed measuring sensor. Each laser speed measurement sensor is connected with the controller host through a sensor wire; the side part of the pressing plate of the compressed tea pressing machine is detachably provided with a light reflecting sheet; the reflector can pass through the laser speed measurement sensor when moving up and down along with the pressing plate, and when the reflector and the laser speed measurement sensor are located on the same horizontal plane, the laser speed measurement sensor is aligned with the reflector. The utility model provides the stroke average speed calibration device of the compressed tea pressing machine, which is accurate in measurement.

The invention discloses a magnetic levitation flight wind tunnel speed measurement device and method based on an optical sensor and a scale. The speed measuring device comprises a scale which is arranged along the motion trail direction of the magnetic levitation flight wind tunnel motion platform. Hollows which are distributed at equal intervals are formed in the scale in the axial direction; the optical probe moves along with the moving platform; the hollowed-out parts and the non-hollowed-out parts between the adjacent hollowed-out parts can form switching between shielding and passing of light beams emitted by the optical probe so as to generate switching type signals; and the switch type signal is used for calculating the motion speed of the motion platform. According to the invention, strong electromagnetic environment anti-interference capability and full-stroke continuous high-precision speed measurement can be taken into consideration at the same time, the system structure is simple, the cost is controllable, and the system can adapt to wide-speed-range test working conditions.