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49results about How to "Data smoothing" patented technology

Method and system for testing dynamic stiffness

The invention relates to the field of traffic rails and specifically relates to a method and a system for testing dynamic stiffness. The method for testing the dynamic stiffness includes that a force in a preset frequency range is applied to a rail in preset time to enable the rail to produce vibration; force signals and vibratory acceleration signals are real-timely acquired according to a preset sampling frequency; data of the force F, time corresponding to the force F, data of an acceleration a and time corresponding to the acceleration a are recorded according to preset time intervals, the acquired force signals and the acquired acceleration signals; a corresponding relation of a displacement X and the frequency f is obtained according to the corresponding relation of the data of the acceleration a and the time corresponding to the acceleration a; the corresponding relation of the displacement X and the time t is obtained; and the corresponding relation of the dynamic stiffness Z and the frequency f is obtained according to the corresponding relations and the corresponding relation of the dynamic stiffness, the displacement and the force, and namely, wide frequency dynamic stiffness is obtained. By means of the method and the system for testing the dynamic stiffness, the wide frequency dynamic stiffness of the rail can be tested.
Owner:SOUTHWEST JIAOTONG UNIV

Deviation correcting system for scanner

A deviation correcting system for a scanner including a central processing unit producing a control signal for reading out a correcting program for correcting a scanning deviation, and a test pattern, for printing the test pattern, for scanning the printed test pattern, and then for correcting a scanning deviation; a print driver producing a control signal for printing the test pattern produced from the central processing unit, feeding the test pattern back to a scanning position; a printing unit printing the test pattern and then feeding the test pattern back to the scanning position upon application of the control signal from the print driver; an image processing unit producing a control signal for scanning the test pattern upon application of the control signal from the central processing unit; and a shuttle scanner module scanning the test pattern and producing image data upon application of the control signal from the image processing unit.
Owner:SAMSUNG ELECTRONICS CO LTD

Data transmission method based on multiple pieces of front-end video equipment and related device

ActiveCN112399141AReduce the probability of I-frame collisionsSmooth network dataClosed circuit television systemsSelective content distributionData transmissionTime range
The invention discloses a data transmission method based on multiple pieces of front-end video equipment and a related device. The data transmission method comprises the steps that back-end equipmentjudges whether multiple key frames are received within a preset time range or not; if so, the key frame generation time of collision front-end video equipment corresponding to at least part of the plurality of key frames is adjusted, so that the back-end equipment uniformly receives the key frames; according to the adjusted key frame generation time, issuing time for issuing a key frame time sequence adjustment command is obtained; and the key frame time sequence adjustment command is issued to the corresponding front-end video equipment according to the issuing time. By means of the mode, theback-end equipment can uniformly receive the I frame within the preset time range, so that the collision probability of the I frame is reduced.
Owner:ZHEJIANG DAHUA TECH CO LTD

Attitude correction control system and method of a four-rotor aircraft

The invention discloses an attitude correction control system and method of a four-rotor aircraft. The control system comprises a flight control main controller, a flight attitude acquisition module,a driving module, a wireless communication module, a GPS module, a power management module and a camera module. The flight attitude acquisition module, the driving module, the wireless communication module, the GPS module, the power management module and the camera module are connected with the flight control main controller. An unmanned aerial vehicle attitude control system comprises a sensor data resolving and processing system, a motor rotating speed control system and a wireless data communication system. According to the invention, cascade PID closed-loop control is carried out on the attitude of the four-rotor aircraft, so that the PWM duty ratio for controlling the rotating speed of the motor is adjusted; and meanwhile, the four-rotor aircraft feeds back the position information obtained from the GPS module and current attitude data of the aircraft to a remote control terminal through a wireless transceiving module, so that the operator checks the current flight state of the aircraft in real time and thus descending processing is performed timely in an abnormal state of the flight to minimize the losses.
Owner:BEIJING UNIV OF TECH

Method for storing data blocks from client devices to a cloud storage system

The invention relates to a method for storing data blocks from client devices to a cloud storage system, the method includes the steps of: d) storing an encrypted first data block and a challenge of the first data block of a first client device on the cloud storage system, e) determining if a hash of a second data block of a second client device stored on the cloud storage system equals the hash of the first data block, f) if yes, transmitting the challenge of the first data block from the cloud storage system to the second client device, g) extracting, at the second client device, the bits at the positions or at the range contained in the challenge, hashing the extracted bits, encrypting the hashed bits with a public key of the first client device or of the second client device and uploading the encrypted bits from the second client device to the cloud storage system, and h) storing the encrypted bits from the second client device on the cloud storage system.
Owner:ABB (SCHWEIZ) AG

Method and device for detecting electric quantity of dry battery

PendingCN112731177AEliminate pulse interferenceData smoothingElectrical testingAutomotive engineeringResidual charge
The invention provides a dry cell electric quantity detection method and device, and the method comprises the steps: carrying out the continuous collection of the voltage of a dry cell at a preset time interval, and forming a voltage oscillogram; filtering the acquired voltage of the dry battery through a median average filtering method to obtain the highest peak value and the lowest peak value of the voltage; performing weighted recursive filtering on the highest peak value of the voltage to smooth an oscillogram of the highest peak value of the voltage; calculating a discharge curve of the dry battery according to the characteristic that the discharge internal resistance of the dry battery increases; and establishing an electric quantity model table of the dry battery according to the discharge curve of the dry battery to obtain a percentage curve of residual electric quantity corresponding to the dry battery. The invention has the beneficial effects that the residual electric quantity trend of the dry battery can be accurately predicted, large-amplitude pulse interference is eliminated, and data smoothness is achieved.
Owner:SHENZHEN KAADAS INTELLIGENT TECH CO LTD
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