219 results about "Time displacement" patented technology

In a cellular radio communication system for several user stations, each radio cell in the radio communication system includes a base station by which the information is transmitted to user stations using broadcast and/or point to multipoint connections. At least two radio cells in the cellular radio communication system are each divided into n radio sectors with n≧2 and the information is transmitted in each of the n radio sectors of a radio cell with a temporal displacement to improve the interference situation. The information is advantageously transmitted in n radio sectors without any temporal overlap. Radio sectors can particularly advantageously be collected in a group, alternately including the lowest coupling factors with regard to radio transmission and transmitting the information for each group at a different time.

The invention relates to a roll forming processing method for online punching and a production line in the technical field of sheet roll forming. The method comprises the following steps of: emptying, leveling, punching, roll forming, cutting and blanking. The punching step comprises the following specific steps of: detecting a real-time displacement signal of the linear motion of a sheet; driving a punching mechanism to move at an accelerated speed according to the displacement signal and drive the sheet to a set punching position along the movement direction of the sheet; driving the punching mechanism to track the linear motion of a coiled sheet and keep moving synchronously with the sheet; in a process of keeping synchronous movement with the sheet, allowing the punching mechanism to punch a hole at the set position on the sheet; and returning the punching mechanism to an initial position. The invention also provides the production line for implementing the method. Punching is performed after a servo motor controlled by a programmable logic controller (PLC) drives a workbench to track the sheet. The processing method and the production line can improve sheet processing accuracy and increase sheet processing speed and can be used for molding, punching and processing sheets with fixedly shaped cross sections.

The invention discloses a sinusoidal phase modulation type laser self-mixing interferometer and a measuring method thereof. The interferometer comprises a helium-neon laser, a variable neutral density filter, an electro-optical crystal modulator, a target to be measured, a photoelectric detector and a signal generator. The signal generator is used for generating sinusoidal signals with frequency of omega<m>, wherein one loop of signals is used for driving the electro-optical crystal modulator, one loop of signals is used as base-frequency signal output and the other loop of signals passes through a frequency doubler and a phase shifter and then outputs doubled-frequency signals with frequency of 2 omega<m>. The output of the photoelectric detector is amplified by an operational amplifier and then is respectively mixed with the base-frequency signals and the doubled-frequency signals to obtain two loops of signals. The signals are subject to low-pass filtering and then a computer unit controls an analog-to-digital conversion unit to acquire and demodulate a phase, so as to obtain and display the real-time displacement of the target to be measured. After the interferometer is calibrated, relative measurement accuracy of 10<-6>*L can be obtained, the measurement uncertainties within the measurement ranges of 100mum and 300mum are respectively 10nm and 0.15mum, and the measurable speed range is 0-60mm/s.

The invention relates to a reverse flux-weakening control type intelligent permanent magnet contactor with no position sensor, which mainly comprises a microprocessor, a rectifier and filter circuit, a control voltage detection module, switch control circuits, power switches, a coil voltage/current detection circuit, a switch power supply circuit, a standby power supply control module and the like. A first switch control circuit drives a power switch Q1 to be conducted with a power switch Q3 to realize the forward flux increasing of a coil; and a second switch control circuit drives a power switch Q2 to be conducted with a power switch Q4 to realize the reverse flux weakening of the coil. The voltage and current signals of the coil are detected in real time to estimate the real-time displacement signals of a movable iron core during the closing of the contactor to realize a detection method without using a position sensor. Through the feedback of the displacement signals of the movable iron core, by adopting the reverse flux-weakening control strategy, the detection-feedback-regulation-control intelligent closed loop operation is realized in the closing process of the contactor, the dynamic attractive force and the counter force of the permanent magnet contactor are in good matching, the primary bounce and the secondary bounce of the contact are reduced, and the electrical service life and mechanical service life of the contactor are improved.

The invention discloses a device and method for active video concentration. According to the technical scheme, an input video is analyzed, a video structured description file is generated, and a relevant database is built; searching is carried out, and searching results are sequenced according to relevancy; an abstract video is generated according to the searching results. The video concentration process is rearrangement (time displacement) and compact piling up of target tracks, moving objects which appear in different time periods are translated to the same time period, and a transparent mapping mode is used for ensuring that overlapped areas of a plurality of targets are visible respectively. The original timestamp and the foreground rectangle of each target in the abstract video is labeled, a video indexing function is achieved, and corresponding original video clips are skipped to by clicking moving targets. The active video concentration scheme can be used for removing redundant target tracks and showing needed information of users, and the investigation efficiency based on videos is improved.

The health of a tool is predicted based on temporally ordered input data representing parameters indicative of tool health. A sliding time window is used to partition input data into temporally displaced data sets. Non-linear regression models determine, based on the data sets, a set of predictive values relating to tool health at a future time. A tool-health metric is then determined based on one or more of the predictive values.

The invention discloses an immersive virtual reality experiencing system. The immersive virtual reality experiencing system is designed mainly to solve the problem that an existing virtual exhibition hall experiencing system is poor in 3D effect. The immersive virtual reality experiencing system comprises a video output module, a gyroscope module, a three-dimensional model acquiring module and a voice module, wherein the video output module is used for acquiring real scene video information in each direction of an exhibition hall in real time, the gyroscope module is used for tracking the displacement and rotating information of a human body in real time and outputting the real-time displacement and rotating information of the human body to a control chip, the control chip controls the video output module to output real scene video information, matched with the current displacement and rotating information of the human body, of the exhibition hall according to the displacement and rotating information, the three-dimensional model acquiring module is used for generating a three-dimensional display video of the directional real scene video of the interior of the exhibition hall, and the voice module is used for outputting audio information, matched with the current displacement and rotating information of the human body, of the real scene of the exhibition hall in real time according to the displacement and rotating information which is output by the gyroscope module.

The invention discloses a dual-wavelength superheterodyne-interference wide-range high-precision real-time displacement measuring system and method. The system is composed of two lasers between which the wavelength difference is deltalambda, three polarization splitting prisms, four splitting prisms, two acousto-optic modulators, four 1/4 waveplates, five planar mirrors, three Polaroids, a super-narrowband filter plate, two large-bandwidth transimpedance photoelectric detectors, two low-bandwidth high-sensitivity photoelectric detectors, a reference reflector, a measured reflector, a signal processing circuit and a host computer. According to the invention, a synthesized wavelength interference signal generated by dual wavelengths is used to improve the measuring range of the system, so that the measuring range of the system is greater than the range of single-wavelength interference; a superheterodyne interference method is used to demodulate and filter output signals, the phase of the synthesis wavelength can be measured directly, and real-time measurement is realized; and the super-narrowband filter plate is used to collect single-wavelength interference signals, and the precision of single-wavelength interference measurement is ensured while the measuring range is widened.

The invention relates to a compression molding method without action of inner rings for integral self-lubricating joint bearings. The compression molding method is characterized in that a self-lubricating layer is adhered on the inner surface of an outer ring blank, a bearing inner ring is placed in the outer ring blank adhered with the self-lubricating layer, a combination of the bearing inner ring and the outer ring blank is sleeved on a central spindle in a cavity of a lower mold, both a cavity of an upper mold and the cavity of the lower mode consist of conical surfaces and cylindrical holes, a chamfer matching with the conical surfaces of the cavities is arranged on a width end surface of the outer ring blank, a compression molding process is precisely controlled according to a pressing time-displacement curve, when the upper mold reaches a target position and an inner spherical surface is formed on the inner surface of the outer ring blank, compression molding is stopped, molds are opened, and a self-lubricating joint bearing meeting the requirement on the backlash is obtained. The compression molding method solves the problem that a self-lubricating layer of an integral self-lubricating joint bearing is damaged by existing forming process, a forming process of the inner surface of an outer ring of the bearing and the backlash of the bearing are controllable, and the bearing manufactured by the aid of the process has the advantages of long service life and high reliability.

A system and method of generating a one-way function and thereby producing a random-value stream. Steps include: providing a plurality of memory cells addressed according to a domain value wherein any given domain value maps to all possible range values; generating a random domain value associated with one of the memory cells; reading a data value associated with the generated random domain value; generating dynamically enhanced data by providing an additional quantity of data; removing suspected non-random portions thereby creating source data; validating the source data according to a minimum randomness requirement, thereby creating a validated source data; and integrating the validated source data with the memory cell locations using a random edit process that is a masking, a displacement-in-time, a chaos engine, an XOR, an overwrite, an expand, a remove, a control plane, or an address plane module. The expand module inserts a noise chunk.

The invention discloses a frozen soil dynamic load direct shear apparatus comprising a shearing box. The shearing box comprises an upper shearing box and a lower shearing box. An ejection head seat is arranged outside the right side of the upper shearing box. A fixed seat is fixed on the end of the right side of a workbench. An ejection head is fixed on the fixed seat. The ejection head matches the ejection head seat of the upper shearing box. The right end of the upper shearing box is fixed. The left end of the upper shearing box is fixed through a fixing device arranged on the workbench. A pushing head is arranged outside the left side of the lower shearing box. The pushing head is connected with an actuating shaft of a loading head through a pin. The loading head provides horizontal dynamic load for the lower shearing box through the actuating shaft. The loading head is fixed on the left side of the workbench through a fixing plate, and is connected with an oil pump. A displacement meter ejection plate is arranged on the actuating shaft. The displacement meter ejection plate cooperates with a displacement meter, and the two are used for measuring real-time displacement of the lower shearing box. A force feedback device is also arranged on the actuating shaft. The displacement meter and the feedback device are connected with a digital measurement and control system and a computer system through a data acquisition device.

A method and system for metering the real-time displacement volume of a piston-type concrete pump is disclosed. Said method includes such steps as measuring the piston displace of concrete cylinder and the pressure of concrete cylinder, analyzing the measured piston displace signal as reference and the pressure signal, calculating the real-time pumping coefficient, finding out the modification to calculated result according to the information contained in the pressure signal of hydraulic system, and metering the real-time displacement of concrete pump.

The invention relates to an optical element high-precision measuring device based on real-time monitoring movement errors, and belongs to the field of optical precision measurement. The device solves the problem that the existing movement error monitoring measures cannot meet the requirement of contour detection precision of an optical element with the large caliber. An X-direction laser interferometer is used for monitoring the real-time displacement of Y-direction guide rail movement, the X-direction straightness error in the Y-direction guide rail movement and the X-direction angle deflection in the Y-direction guide rail movement process; a Y-direction dual-path laser interferometer is used for monitoring the real-time displacement of an X-direction guide rail, the Y-direction straightness error in the X-direction guide rail movement and the Y-direction angle deflection in the X-direction guide rail movement process; a Z-direction confocal probe laser interferometer is used for monitoring the real-time displacement of a Z-direction confocal probe in the movement process; the Z-direction angle deflection of the laser confocal probe is obtained through the X-direction displacement difference measured by a dual-path capacitive sensor; the capacitive sensor is used for measuring the X-direction straightness error of the laser confocal probe in real time. The optical element high-precision measuring device is used for detecting an optical element.

A testing machine for testing the mechanical parameters of subgrade materials under the freezing and thawing cycle comprises a temperature controlled system, a dynamic load system, a mechanical parameter testing system, a data acquisition system and an electronic control system; the temperature controlled system is used for simulating the freezing and thawing cycle of subgrade soil in the real environment; the electronic control system is used for controlling the dynamic load system during the freezing or thawing process, thereby enabling the dynamic load system to output various frequencies to simulate the traffic load; the mechanical parameter testing system is used for measuring the total settlement and strain; the deflection and strain value is collected by the data acquisition system in a real-time manner; and after processing, the numerical values, the time-displacement curve and the strain-time curve are displayed. The invention tests the mechanical characteristic parameters of the subgrade materials and monitors the frost-heave capacity, the pavement deflection value and the deformation of the materials during the process of the dynamic load freezing or thawing, quickly and stably simulates the environment necessary for testing, and measures the mechanical performance index of the materials, thereby providing design parameters for road engineering in a seasonal frost region, ensuring that a road in the seasonal frost region fulfills the service life as designed, and improving the measuring accuracy with accurate calculation result.

The invention discloses a method for time alignment between interference SAR echo data and platform motion and gesture data. The method comprises the steps of selecting the interference SAR echo data corresponding to a flat ground scene, acquiring the platform motion and gesture data corresponding to the interference SAR echo data and measured by a platform inertial navigation / GPS device, compensating the interference SAR echo data by means of the platform motion and gesture data when a roll angle is 0 degree to further obtain a scene digital elevation model through back analysis, acquiring an elevation azimuth wave function from the scene digital elevation model, acquiring the changing function of the roll angle from the platform motion and gesture data, solving a time value corresponding to the most value of a cross-correlation function of the elevation azimuth wave function and the changing function of the roll angle and taking the time value as time displacement quantity, and carrying out time displacement on the platform motion and gesture data according to the time displacement quantity and achieving the time alignment between the interference SAR echo data and the platform motion and gesture data.

A benchmark test system captures and records root, or input, behavior from a user input device as one or more time-displaced samples of input. The system also separately captures and records the canvas, or visual, behavior of a user interface in response to the captured input as a series of time-displaced image frames. The image frames are analyzed for visual prompts occurring responsive to the input, and parameters of the image frames are determined. A parametric difference between corresponding ones of the root events and canvas responses is thereby computed, in order to determine a degree of visual responsiveness for the user interface software respective to the root input.

The invention discloses an integrated device applicable to fast and safety diagnosis of middle and small bridges. The integrated device comprises a mobile inspection vehicle, an impact excitation device, a data acquisition device, a data processing device, and an extensible cantilever system at the lower end of the chassis of the mobile inspection vehicle; the impact excitation device comprises a loading bracket and a loading hammer arranged on the loading bracket; the data processing device comprises a force measuring sensor which is arranged on the lower end surface of the loading hammer and used for measuring the time-displacement data of the force formed by impacting the bridge pavement and an accelerometer sensor which is positioned at the tail end of the cantilever system and used for measuring the acceleration response of the bridge; and the data processing device is used for identifying a displacement flexibility matrix of the bridge according to the force time-displacement data measured by the force measuring sensor and the bridge acceleration response data measured by the accelerator sensor. The integrated device can be used for ensuring that the mobile type impact vibration test of the middle and small bridges to smoothly perform, ensuring that the reliability of the structure performance evaluation result obtained by analyzing the measured impact vibration data, and has relatively high advantages in comparison with the conventional method.

The invention relates to a non-contact real-time method for measuring the bending displacement of a work piece (5) which is deformed by a bending method, and the method comprises the following steps: the bending work piece (5) catches at least a part of geometrical images of the work piece (5) by a camera (7), a processor (8) which is electrically connected with the camera processes the images, and the processor (8) determines the bending displacement of the work piece (5). Moreover, the invention relates to a measuring system for executing the method.