176results about How to "Reduce time error" patented technology

The invention discloses a vehicle identification method and device and a vehicle. The method comprises the steps that a first image and a second image are acquired, the first image is a color image or a brightness image, and the second image is a depth image; road lane lines are acquired according to the first image; the road lane lines are mapped to the second image according to the interleaving mapping relation between the first image and the second image so that a vehicle identification range is generated in the second image; and the vehicle is identified according to the vehicle identification range. According to the method, the opposite-side vehicle can be rapidly and high-precisely identified, and alarm information can be rapidly and reliably generated on the basis of the identified opposite-side vehicle so that valuable braking reaction time can be won for the driver of the vehicle or the opposite-side vehicle and thus driving safety can be further enhanced.

The invention relates to a network security situation forecasting method and system. The network security situation forecasting method comprises the steps that an obtained network security situation value sequence set serves as training data; a back propagation neural network structure is initialized, and the initialization operation comprises the step of setting the number M of nerve cells of an input layer and the number N of nerve cells of an output layer; real number encoding is carried out on the training data and the training data with the maximum fitness are found; a security situation value corresponding to the number M of the nerve cells of the input layer in the training data with the maximum fitness serves as an input value, a security situation value corresponding to the number N of the nerve cells of the output layer serve as a desired output value, the back propagation neural network is trained, and a forecasting model of the network security situation is established; the security situation value corresponding to the number M of the nerve cells of the input layer serves as the input value, and the security situation value corresponding to the number N of the nerve cells of the output layer is forecast according to the forecasting model. The network security situation forecasting method can improve the convergence rate of network security situation forecasting, shorten training time and reduce forecasting errors.

The invention discloses a method and a system for protecting time transfer in synchronization network; a corresponding module is added to the prior art to use time synchronization frequency of the synchronization network as the basis of time synchronization protocol, so the network is ensured to synchronously lock clock signal; a synchronization network clock source which participates in selection is configured, and the clock source selection mode is configured; current clock source is selected according to the selection mode, and the frequency state of the current clock source is synchronously locked; the current clock source state is used as state basis of accurate time protocol port to sequentially lock time of element location nodes in the synchronization network. The corresponding module is added to the prior art to use time synchronization frequency of the synchronization network as the basis of time synchronization protocol, so the time transfer error in element location nodes is greatly reduced, and the time error in large scale networking is reduced, and the stability of synchronization network is improved in the switching process of clock sources.

The invention discloses a method for recognizing the type of a vibration source of a tunnel, and a vibration source positioning method. The method for recognizing the type of the vibration source comprises the following steps: setting distance setting monitoring regions in the tunnel at intervals, wherein four corners of each monitoring region are respectively provided with a triaxial vibration sensor; collecting X-axis, Y-axis and Z-axis acceleration analog quantities of the triaxial vibration sensor in real time through the triaxial vibration sensor, and converting the acceleration analog quantities into digital quantities; carrying out the calculation and analysis of the monitoring data of the triaxial vibration sensor: building a vibration triggering algorithm; filtering background noises, judging the focus direction through longitudinal and lateral stationing combined analysis, and measuring the distance of a focus through a difference point of transverse and longitudinal wave propagation; and finally achieving an effect of precisely determining the focus. The method provides strong technological guarantee for the early warning and quick response of power safety production.

A method for determining the accuracy of an appraisal report using a computer implemented application, including pre-validating an appraisal report to determine whether a first set of rules has been satisfied, the appraisal report including N fields to be completed, the first set of rules comprising completion of a pre-determined number of N fields; proceeding to a post-validating step if the first set of rules is satisfied; post-validating an appraisal report to provide an evaluation thereof, the evaluation including a plurality of risk categories including risk level indicators, and a risk-based overall score.

The invention discloses a local clock adjusting method, a timing method and a timing device The local clock adjusting method comprises extracting timing information from a received air interface signal, calculating the frequency offset amount of a local clock according to the timing information, and adjusting the local clock according to the frequency offset amount. Furthermore the invention provides a timing method which comprises adjusting the local clock according to the local clock adjusting method, and performing timing on other terminal equipment. Compared with prior art, the local clock adjusting method realizes higher accuracy of the local clock after adjustment. Furthermore the invention provides a lock clock adjusting device and a timing device so that a base station can directly receive the air interface signal which is transmitted from the LTE system for acquiring the timing information in the air interface signal. A GPS module or other hardware which is equipped on the base station or the terminal equipment for receiving the air interface signal of the base station is not required. A precision required for synchronous timing can be realized. Furthermore difficulty in base station wiring and base station maintenance difficulty are reduced.

A method for determining the accuracy of an appraisal report using a computer implemented application, including pre-validating an appraisal report to determine whether a first set of rules has been satisfied, the appraisal report including N fields to be completed, the first set of rules comprising completion of a pre-determined number of N fields; proceeding to a post-validating step if the first set of rules is satisfied; post-validating an appraisal report to provide an evaluation thereof, the evaluation including a plurality of risk categories including risk level indicators, and a risk-based overall score.

The invention discloses a rapid repulsion tripping mechanism for a direct-current circuit breaker and a tripping method thereof. The repulsion-tray tripping mechanism has high response speed and small dispersivity and is not affected by the changes of external short-circuit current during the motion process. A tripping pusher is directly driven to rapidly trip by an electromagnetic repulsion force which is generated due to the eddy current effect of an alternating magnetic field in an electromagnetic repulsion tray. The instantaneous eddy-current electromagnetic force generated by the repulsion tray is large, and the direct-drive design significantly reduces intermediate mechanism links and reduces the qualities of moving components, so that the action speed of the direct-current circuit breaker is effectively increased and the inherent opening time of the circuit breaker is greatly shortened. Besides, the repulsion tray has a compact structure and a small size, the spatial distribution of the circuit breaker is fully utilized and optimized to reduce the size of the circuit breaker.

The invention discloses a pulsar photon timing method based on an APD detector. An APD is used for realizing detection on weak pulsar photons of 0.5keV to 10keV. On one hand, the pulsar photon timing method has the advantages of high detection efficiency, rapid response time, high energy resolution and the like; on the other hand, photon-generated carriers in the detector are drifted along a pn junction direction; time jitter caused by the detector is relatively small, so that the pulsar photon timing method is very suitable for pulsar photon timing; a constant-ratio timing and single threshold value triggering method is adopted, so that noises are inhibited, and furthermore, an amplitude movement effect caused by different X photon energy is eliminated; advantages that a GPS (Global Positioning System) second pulse signal is long and stable and an atomic clock is short and stable are combined, and long and stable and high-precision clock frequency is output through a correction principle; TDC (Time-Digital Convert) timing precision is kept; furthermore, pulsar photon timing errors are reduced.

The invention relates to a measurement device for the surface resistance of the steel plated applied in galvanized fingerprint resistance electric appliances, for resolving the defects of the prior art such as one probe only can collect one data and a worker, and the test time is long. The measurement device comprises a probe 1, a transverse slide way 3 connected with a frame 2, a power device 4 and a slider 5 which are connected with the transverse slide way 3, and a lifting mechanism 6 connected with the lower end of the slider 5, wherein the probe 1 is connected with the lower end of the lifting mechanism 6, the frame 2 is connected with a bottom plate 7, the lower end face of a sample table 8 is connected with a frame 8, a sample clamp turning device 10 is connected with the bottom plate, a computer 11 is connected with a PLC controller 13 via a wire 12, the PLC controller 13 is connected with a servo motor controller 15, a power device 4 and a surface resistance data processor 14 via wires 12, and the surface resistance data processor 14 is connected with the probe 1. The measurement device can automatically collect the data of multiple points in one time, obtain uniform and stable pressure, and obtain all-automatic measurement and surface turning.

The invention discloses a modular arranging and conveying device of a reinforcing steel bar end processing production line, belongs to the technical field of reinforcing steel bar processing equipment, and is used for arrangement and conveyance of ribbed reinforcing steel bar end processing production lines. According to the technical scheme, the modular arranging and conveying device comprises one or more standard arranging and conveying modules; each standard arranging and conveying module comprises a rack, a reinforcing steel bar storing and dispersing mechanism, a single reinforcing steelbar taking-out and turning-over mechanism, a front roller conveying mechanism, an inter-station turning-over and shifting mechanism, a back roller conveying mechanism and a discharging and turning-over mechanism, and the mechanisms are sequentially mounted on the rack; and when the standard arranging and conveying modules are connected, the mechanisms are correspondingly connected. With the modular arranging and conveying device, field operations such as storage, automatic dispersion, single separation, inter-station conveyance, collection after processing and the like of multiple reinforcingsteel bars can be realized, the device can be matched with different reinforcing steel bar end processing devices, different connection technology requirements can be met, and the mechanical and automatic degree and the processing quality of the processing production line can be improved.

The invention discloses a direct current circuit breaker. The invention provides a quick repulsive force tripping mechanism for preventing impact vibration and an integrative method for a repulsive force compensation structure. The direct current circuit breaker disclosed by the invention can effectively tolerate mechanical shocks such as bumping vibration, the false tripping probability is extremely small, and the reliability is high in normal working process. Meanwhile, a repulsive force disc is utilized as a reaction device for the tripping mechanism, and the energy opening of the repulsive force disc is utilized, so that the movement speed of the direct current circuit breaker is obviously improved, and the inherent opening time of the circuit breaker is greatly shortened. Moreover, the structure of a moving contact guide rod is utilized by the direct current circuit breaker disclosed by the invention, and the driving spring force for opening is converted into holding power between a static contact and a moving contact during opening work, so that the moving contact is not repelled under the condition of high short-circuit current, and the short-time endurance capacity of the direct current circuit breaker is improved.

The invention provides a method for improving the accuracy of timing of a quartz timer, which comprises the following steps of measuring the finished product quartz timer under a working condition by using an instantaneous daily rate measuring instrument to acquire a time daily error value of the quartz timer; setting a calibration time point, a time daily error value and a calibration time internal value in an MCU (micro controller unit) of the quartz timer; and at last, reallocating initial timing of a clock chip according to the time daily error value. The method makes time calibration of the high-precision quartz timer more accurate and convenient, can avoid errors produced by manual operation, meanwhile effectively reduces cost and has significant social economic benefits.

The invention provides an arrive time measuring method and system of a multipoint position dependent surveillance system. The method comprises under a system reference clock provided by the multipoint position dependent surveillance system, carrying out A / D sampling and quantification on received target response signals, carrying out difference coupling filtering on digital signals processed through A / D sampling and quantification, carrying out zero crossing detection on signals processed through difference coupling filtering to obtain the arrive time of the target response signals through zero crossing detection within the detection threshold. On the premise that the positioning precision of the multipoint position dependent surveillance system is effectively raised and the cost of hardware is reduced, the precision of estimation of the arrive time can be raised, and the error of time measurement of the system can be reduced.

The invention discloses a processing method of field synchronizing signals, and a control circuit, for reducing time errors of field synchronizing signals generated by multiple display devices and reducing black screen and scintillation phenomena. The method comprises the following steps: obtaining external field synchronizing signals and pixel clock signals; counting the signal quantity of current pixel clock signals within the signal period of the external field synchronizing signals to obtain a target signal quantity, and comparing the target signal quantity with a preset signal quantity; and determining whether a comparison result satisfies preset output signal conditions, if not, according to the comparison result, adjusting the clock frequency of the current pixel clock signals to obtain a target clock frequency, then executing counting an comparison by taking the adjusted pixel clock signals as the current pixel clock signals, and if so, outputting local field synchronizing signals according to the current pixel clock signals and preset rules.

The invention discloses a neutron diffraction method for welding residual stress of a duplex stainless steel thick plate. The method comprises the following steps: determining stress testing crystal faces in different directions and a wavelength changing manner, so that a penetration depth of the neutron in the duplex stainless steel thick plate is increased, and testing time and testing errors are reduced; accurately calculating a two-phase ratio in a standard volume of the neutron diffraction test by virtue of transformation of diffraction peak intensity; and simultaneously testing two-phasestresses under specific equipment and diffraction conditions. According to the method disclosed by the invention, the penetration depth of the neutron can be effectively improved by virtue of a variable wavelength manner; the residual stress time of the duplex stainless steel thick plate in the neutron diffraction test can be reduced; the testing error of the residual stress of the duplex stainless steel thick plate can be reduced; the two-phase ratio in the standard volume can be accurately calculated by utilizing data of the diffraction peak intensity obtained by the neutron diffraction; and the influence produced by micro stress caused by two-phase performance mismatching is clear, and macro welding residual stress distribution of the duplex stainless steel is accurately calculated.

The invention provides a method for testing residual stress of a thick plate by a neutron diffraction technology. According to the method, in allusion to crystal structures and elemental components ofdifferent test materials, corresponding relationships among the Bragg edges, the total neutron absorption cross sections and the wavelengths of the test materials are calculated; through calculationof the corresponding relationships among the Bragg edges, the total neutron absorption cross sections and the wavelengths, several wavelength values which can increase the penetration depth of neutrons in a thick plate sample are determined; the texture of the sample is tested, a preliminary test wavelength according to a test result of the texture is selected, and corresponding optimal wavelengths of the test sample in a transmissive mode and a reflective mode are selected according to a peak height / background value, a strain error value, a total neutron count and the actual neutron penetration path length; through change of the wavelengths, the penetration depth of the neutrons in the thick plate sample is increased, the test time is shortened, a test error is reduced, and the residual stress of the thick plate is accurately tested. In a way of changing the wavelengths, the penetration ability of the neutrons in the thick plate sample is improved, the efficiency of testing the residual stress of the thick plate through neutron diffraction is improved, the test time is shortened and the test error is reduced.

The invention discloses a magnetofluid clock which comprises four clock digital display units. Each digital display unit comprises a bottom plate and a front panel in parallel, wherein seven motors are installed on the bottom plate, a lead screw is fixedly installed on a rotary shaft of each motor, a strip-type linkage plate is installed on each lead screw, the two ends of each linkage plate are arranged on two guide pillars fixed to the bottom plate in a sleeving mode respectively, the seven linkage plates are arranged in an 8 shape, and all the linkage plates are provided with electromagnets; magnetofluid is placed in the front panel, and the linkage plates are driven by the motors to move forwards or backwards; when the linkage plates move forwards, the electromagnets on the linkage plates attract the magnetofluid; when the linkage plates move backwards, the magnetofluid is released and returns to the original position. According to the magnetofluid clock, an electronic part and a mechanical part are combined; firstly, the advantages of the electronic part that timing is accurate and the number of time errors is extremely small are utilized in cooperation with the mechanical part, digits are displayed by attracting the magnetofluid, the display effect is rich, and more interestingness is achieved.

The invention provides a control method of a remote controller. The remote controller includes a control chip internally provided with a high frequency oscillator and a low frequency oscillator. The control method includes the following steps: controlling the high frequency oscillator and the low frequency oscillator to be in an off state and an on state respectively, and setting a wake-up time interval; controlling to start the high frequency oscillator and obtaining the initial timing time when the timing time of the low frequency oscillator reaches the wake-up time interval, and obtaining the current timing time of the high frequency oscillator when the timing time of the low frequency oscillator after the starting of the high frequency oscillator reaches a calibration time interval; determining the current deviation time of the low frequency oscillator according to the current timing time, the initial timing time and the calibration time interval; adding the current deviation timeto a historical cumulative deviation time to obtain the current accumulative deviation time; and determining whether to calibrate the preset timing time of the remote controller or not according to the current accumulative deviation time. The invention also provides a control device of the remote controller, a computer readable storage medium, and the remote controller.

The GNSS simulator is usually used in flight control system semi-physical simulation and can simulate navigation signals radiated by sky satellite constellations at the position of an airplane and assists the simulation system in completing flight control semi-physical simulation containing a satellite positioning receiver. The GNSS simulator and the simulation computer have different clock precisions so that the accumulated time difference of the GNSS simulator and the simulation computer in the long-time simulation process is continuously increased, and finally, the problem that the receivercannot be positioned due to time difference overrun within several hours occurs. The invention provides a high-precision GNSS simulator time synchronization method which has low cost and good effect,simulation computer hardware is not changed, instead, a set of external embedded timing equipment is adopted, the timing period in the equipment is continuously adjusted according to a pulse per second signal outputted by the GNSS simulator and the accumulated time can keep accurate tracking of the pulse per second, and the trigger signal is transmitted to the simulation computer according to thecorrected cycle beat, thereby thoroughly eliminating the accumulated time error between the simulation computer and the GNSS simulator.

The invention discloses a tip timing measurement device and method based on an optical fiber bundle probe. The tip timing measurement device comprises a blade tip, a light source, the optical fiber bundle probe, a first optical fiber bundle combiner, a second optical fiber bundle combiner, a first optical fiber loss device, a second optical fiber loss device, an optical fiber coupler, a photoelectric detector and a display terminal; light emitted by the light source enters an emitting optical fiber of the optical fiber bundle probe; and when the blade tip sweeps over the optical fiber bundle probe, the light is reflected by the blade tip and then received by a first circle of receiving optical fiber and a second circle of receiving optical fiber, the received light is converged to corresponding optical fibers through the first optical fiber bundle combiner and the second optical fiber bundle combiner, the coupling ratio is adjusted through the first optical fiber loss device and the second optical fiber loss device, optical signals are coupled into the photoelectric detector through the optical fiber coupler, the optical signals are converted into electric signals, and tip timing signals are obtained. Compared with a traditional optical fiber bundle probe, the tip timing precision under the condition of tip gap fluctuation is improved.

The invention provides a data generation method and device based on sensors, a data transmission method and device based on sensors, and a data processing method, device and system based on sensors. The generation method comprises: acquiring synchronously collected sensing data from at least two sensors; and generating an extended frame according to the sensing data acquired from the target sensorin the at least two sensors, wherein the data portion of the extended frame carries data content of the sensing data of the target sensor. Therefore, a plurality of synchronous sensing data is read through an extended frame, the difference of underlying hardware is shielded, and the plurality of synchronous sensing data can be acquired by calling the extended frame for one time, thereby reducingthe extra overhead and time error of multiple times of transmission of the sensing data, improving the transmission efficiency, and further improving the data processing efficiency.

The invention relates to a functional near-infrared device for pushing aside hair in a head cap hole. The functional near-infrared device comprises a device ferrule and device deflector rods connected with the device ferrule, wherein the device deflector rods have elasticity; a near-infrared light electrode can be placed in the device ferrule; deflector sheets are arranged at end parts of free ends of the device deflector rods and are L-shaped with the deflector rods; deflector rings are further arranged at inner sides of the device deflector rods and are arranged at positions 1 / 3 away from single sides of the free ends of the device deflector rods, so that the device deflector rods are conveniently operated to be gathered inwards; and in order to conveniently operate the device disclosed by the invention, mounting forceps with forceps rods are further arranged, the forceps rods correspond to the device deflector rods in number and angle, and free ends of the forceps rods are matched with the deflector rings and can be detachably connected with the deflector rings. The device has the advantages that a scalp can be accurately, simply, conveniently and rapidly exposed, the hair is prevented from rebounding, the near-infrared light electrode is rapidly mounted, thus, near-infrared light can be in direct contact with the scalp, interference of the hair to signals is reduced, clinical and scientific researchers can better carry out functional near-infrared related research, and the working efficiency is improved.

The invention relates to a time synchronization method, device and system, a storage medium and a vehicle. The method comprises the following steps: associatively storing a current road condition image acquired by an image acquisition device and a current moment displayed by a first clock; obtaining a time offset; sending a first synchronization request including a time offset to the micro-controlunit; and receiving and storing the bus data associated with the current moment displayed by the second clock and sent by the micro-control unit. In this way, during the driving process of the vehicle, the second clock of the micro-control unit can be calibrated, the acquired bus data is associated with the current time displayed by the second clock. Further, the microprocessor can store the busdata associated with the current moment displayed by the second clock, the stored image association time is synchronized with the bus data association time, so that the time error of the image and thebus data is effectively reduced, the image is matched with the bus data, and an effective reference for solving the problem can be provided for a vehicle developer.

The invention discloses a multifunctional safety ultraviolet vehicle, relating to the field of articles for disinfection. The multifunctional safety ultraviolet vehicle comprises a base, a vehicle frame and a light box, wherein the vehicle frame is fixedly arranged on the base, the light box is connected with a support through a rotational shaft, the light box is internally provided with an upper light tube and a lower light tube, the bottom of the base is provided with rollers, the upper part of the base is provided with a drive motor which is connected with the rollers through a shaft, the support is provided with a wireless radio-frequency remote control switch, the rotational shaft is connected with a motor, the wireless radio-frequency remote control switch is electrically connected with the drive motor and the motor, the vehicle frame is provided with a timer, the upper light tube and the lower light tube are both connected with the timer, and each roller has the diameter of 5-6cm. According to the multifunctional safety ultraviolet vehicle disclosed by the invention, the wireless radio-frequency remote control switch is used to control the movement and operation of the ultraviolet vehicle, thus, the safety coefficient is high, and the light tubes are high in timing precision, and thus, resource wastes are prevented.

The invention provides a control method of a remote controller. The remote controller comprises a control chip with a built-in high frequency oscillator and a built-in low frequency oscillator; the control method comprises the following steps: setting error correction reference time; controlling the simultaneous starting of the high frequency oscillator and the low frequency oscillator so as to respectively begin timing; when the time-keeping time of the high frequency oscillator achieves the error correction reference time, acquiring the current time-keeping time of the low frequency oscillator; and calibrating the time-keeping time of the low frequency oscillator according to the error correction reference time and the current time-keeping time. Correspondingly, the invention further provides a control device of the remote controller, a computer readable storage medium and the remote controller. Through the technical scheme provided by the invention, the timing error of the low frequency oscillator built in the remote controller circuit can be effectively reduced under the situation of eliminating an external crystal oscillator or ceramic oscillator on the remote controller circuit.

The invention discloses a delay test system. The system comprises a first OSD generator, a second OSD generator, a first OSD superimposer, a second OSD superimposer, a display screen, a camera and a computer, the first OSD superimposer is used for superimposing a first timestamp injected by the first OSD generator on an input video signal, outputting a character superimposed video signal, and generating transmission information after the character superimposed video signal passes through a to-be-tested transmission system. The second OSD superimposer is used for superimposing a second timestamp injected by the second OSD generator on transmission information generated by the transmission system and outputting a character superimposed video signal; the display screen is used for displayingthe character superimposed video signal output by the second OSD superimposer; the camera is used for shooting the character superimposed video signal displayed on the display screen to generate screen recording data; and the computer is used for identifying the screen recording data generated by the camera and measuring the transmission delay time of the to-be-measured transmission system. The delay test system provided by the invention is high in calculation precision, low in design cost and good in universality.

The invention relates to a lightning strike fault line selection and positioning method based on a 110kV partial same tower double-circuit line, and belongs to the technical field of power system relay protection. Firstly, the parameters of a rod tower, lightning current and an insulator are set. From the perspective of the traveling wave propagation process and the coupled current propagation process, the characteristics of the common and different first wave head polarity of each zero-mode current at each measuring end are used when lightning strikes different locations, the positioning of alightning strike fault zone is achieved, based on the principle that when the coupled current traveling wave and the initial fault traveling wave arrive at a certain measuring terminal, the time is different, a lightning fault location is accurately measured, finally, the single-ended ranging is used for analyzing the applicability of the lightning strike fault location of the same tower double-circuit line of a 110kV part, and after the simplified line model is obtained, the single-ended ranging method is used for locating faults.

The invention relates to the technical field of electronic circuits, in particular to a timing device. The timing device comprises a laser detector, a controller and a timer, wherein the laser detector and the timer are electrically connected with the controller respectively. The laser detector is used for generating induced electric signals after inducing the human body; the controller is used for generating stop signals after receiving the induced electric signals; the timer is used for timing and sending timing information to the controller when receiving the stop signals. By means of the timing device, timing errors can be reduced, the labor cost of timing can be saved, and manufacturing cost is low.