518 results about "Self correction" patented technology

The invention discloses a data validation, mirroring and error/erasure correction method for the dispersal and protection of one and two-dimensional data at the micro level for computer, communication and storage systems. Each of 256 possible 8-bit data bytes are mirrored with a unique 8-bit ECC byte. The ECC enables 8-bit burst and 4-bit random error detection plus 2-bit random error correction for each encoded data byte. With the data byte and ECC byte configured into a 4 bit×4 bit codeword array and dispersed in either row, column or both dimensions the method can perform dual 4-bit row and column erasure recovery. It is shown that for each codeword there are 12 possible combinations of row and column elements called couplets capable of mirroring the data byte. These byte level micro-mirrors outperform conventional mirroring in that each byte and its ECC mirror can self-detect and self-correct random errors and can recover all dual erasure combinations over four elements. Encoding at the byte quanta level maximizes application flexibility. Also disclosed are fast encode, decode and reconstruction methods via boolean logic, processor instructions and software table look-up with the intent to run at line and application speeds. The new error control method can augment ARQ algorithms and bring resiliency to system fabrics including routers and links previously limited to the recovery of transient errors. Image storage and storage over arrays of static devices can benefit from the two-dimensional capabilities. Applications with critical data integrity requirements can utilize the method for end-to-end protection and validation. An extra ECC byte per codeword extends both the resiliency and dimensionality.

The invention discloses a method for predicting the left capacity and the health status of a storage battery. According to the invention, predicting the left capacity of the battery based on an ampere hour integration method and an open-circuit voltage method is realized, an adjustment is carried out based on discharge currents and ambient temperature, a self correction is carried out in a process of continuous driving and influences from cell agedness on electric capacity prediction are corrected. Based on the working characteristic of a vehicle cell, a cell failure determination mode based on a combination of open-circuit voltage and ampere hour integration is put forward and the trouble of carrying out a check discharge test towards the cell is avoided. Experiments show that in the case of vehicle power storage battery which is not at a float status in a long term, the capacity obtained from the method has a high reliability. The invention is directed to the social background that motor-assisted bicycles are frequently used at present while most users know little about the cell status and has great application significances.

The invention relates to stereo projection systems for displaying stereopaired images on mirror-spherical or parabolic screens and for collectively watching a stereo effect without using stereo spectacles. Said invention makes it possible to continuously dynamically superimpose the projections of the left and right picture frames of a steropair with the user's left and right eyes, respectively. Such impositions are carried out simultaneously and independently for each viewer. The technical result is attainable by that the inventive stereo projection system comprises stereo projectors which are individually allocated to each viewer and in-series connected, a monitoring system for continuously and accurately determining the viewers' eye positions, a self correcting device, video-correcting devices, automatic drives for the mechanical self-correction of the stereo projectors and the system optical elements, units which are used for forming stereopair projected images in the stereo projector and which are coupled with the video-correcting device for the video-correction of the optimal parameters of the screen images. The inventive system makes it possible to carry out the self- and video-correction in an integral manner in such a way that the comfort of the stereo effect viewing is maximally satisfied.

The present disclosure relates to the use of hybrid predictive models to predict one or more of performance, availability, or degradation of a power plant or a component of the power plant. The hybrid predictive model comprises at least two model components, one based on a physics-based modeling approach and one based on an observational or data-based modeling approach. The hybrid predictive model may self-tune or self-correct as operational performance varies over time.

The invention relates to a unidirectional reliable transmission method and a transceiving device based on data packages, belonging to the field of computer networks. In the method, a transmitting end firstly segments an information data block into data package sequences, classifies the data packages, covers erasure correcting codes and carries out coding to generate a redundancy packet covered by each subcode, then carries out cyclic redundancy code (CRC) coding on each data package, finishes the packaging of the data packages, carries out forward error correction (FEC) coding inside the packages on all data packages and finally transmits data into a receiving end; and the receiving end firstly carries out caching on data packages, FEC decoding inside the packages on all data, sequencing on the data packages and verifying by CRC codes, judges whether the data packages lose or not by detecting package numbers and carries out package loss recovery if information data packages lose. The invention solves the technical field of not being capable of carrying out self-checking and error self-correction based on data package transmission under a unidirectional channel and can correct in-packet information errors inside the packages and recover continuous package loss.

Aspects for validating access point locations in a wireless network are described. The aspects include performing a scan in a validating access point for another access point in the wireless network. Location data of a detected access point is utilized in the validating access point to direct self-correction of current location data of the validating access point.

The invention discloses a self-correction method of a multi-input multi-output radar system array error, relating to the radar technical field. The method aims to carry out self correction of the reliant amplitude and phase error of a receiving array azimuth on the premise that the transmitting array of a multi-input multi-output radar system. The implementation process of the method is as follows: firstly, by means of the two corrected transmitting array elements of the multi-input multi-output radar system, orthogonal signals are transmitted; then, the echo signals of the transmitting array elements are separated by means of the orthogonality of transmitting signal through adopting a matched filtering method; an auto correlation matrix and a cross correlation matrix are established by means of the echo signals; a real guide vector and a target angle of an array are estimated by means of a rotary invariant subspace method; finally, by means of the real guide vector and the target angle of the array obtained through estimation, the array azimuth reliant amplitude and phase error can be corrected. The self-correction method can be used in the array error correction field of a multichannel radar system.

The invention discloses a self-correcting phaselocked loop frequency synthesizer capable of realizing frequency band selection, composed of a phaselocked loop and a self-correction loop; wherein the phaselocked loop is formed by connecting a phase detection discriminator, a charge pump, a loop filter, a voltage-controlled oscillator and a frequency divider in sequence, the self-correcting loop is formed by connecting a phase detection discriminator, a trigger, a controller, a voltage-controlled oscillator and a frequency divider in sequence, and the phaselocked loop and the self-correcting loop share the same phase detection discriminator, the same voltage-controlled oscillator and the same frequency divider. The invention realizes center frequency correction by regulating one group of fixed capacitor of voltage-controlled oscillator, so that widen frequency tuning range can be obtained under lower gain of voltage-controlled oscillator, thus error caused by making process of integrated inductance and variable varactor can be compensated, phase noise of phaselocked loop frequency synthesizer is reduced, and implementation of single chip phaselocked loop frequency synthesizer by adopting CMOS technology can be realized.

The invention discloses a control method for a vehicle air suspension; the invention takes the electric control device of a hardware part as the core and is configured with components such as various external sensors, an air spring, an air valve, and an adjustable shock absorber, and the like; the software part comprises signal detection, data processing and secondary calculation, a control method and control output; and firstly different working models are judged by calculating the variance of the input vehicle body height and the vehicle speed; open-loop control and a neural network are used for realizing online self-correction function; the electric control device controls the implementation of the air valve according to the air charge and discharge time which is obtained by the neural network, and then the air molar concentration and the deviation quantity in the spring are obtained by calculation; and finally a detail control signal is obtained. The control method causes the vehicles to be controlled flexibly under different pavement conditions, has appropriate flexibility and damping performance under various road conditions, effectively solves the conflicts when parameters are matched to be suitable for various road conditions, and improves the handling performance, the safety, the comfort and the off-road performance of the vehicles.

The invention relates to the technical field of optical fiber communication, and particularly discloses a method for calibrating, compensating and self-correcting parameters of an optical module. The method comprises the steps of: (1) parameter calibration, i.e., reading read-out values of each monitored parameter of the optical module at different temperatures, acquiring corresponding actual values, obtaining a calibration formula and calibrating each monitored parameter by the calibration formula; (2) parameter compensation, i.e., by using a module output at the normal temperature as a reference value, regulating parameter setting of an optical module register to enable an actual module output to be approximate to the reference value, and fitting into a compensation formula; and (3) parameter self-correction, i.e., comparing an output value of each calibrated parameter with an ideal value, and if a large deviation exists, fine regulating the parameter according to a deviation direction, correcting an output effect, and regulating a parameter value of the compensation formula in the step (2). According to the method disclosed by the invention, workload of a worker is reduced, and accuracy and reliability of each parameter index of the optical module are improved.

A divider is disclosed herein. The divider includes a sequence of divide stages programmably coupled to provide a variety of divide ratios. The divider also includes one or more multiplexers to feedback the output of a divide stage to the input of a divide stage earlier in the sequence of divide stages. The divider may also include duty cycle correction circuitry and self correction logic to correct abnormal logic states. The divide stages can operate in synchronism with each other. Multiplexer functionality, self correction circuitry functionality, and divide stage functionality may be implemented in a combination latch circuit.

The invention relates to the field of intelligent control over equipment, in particular to an intelligent alternating current contactor capable of being controlled digitally and dynamically in the whole process. A digital chip is used for realizing closed-loop control over the speed in an attraction process of the alternating current contactor (based on coil current falling edge slope), impact energy of a movable/static iron core and a movable/static contact is controlled directly, and bouncing of the iron core and the contact in the attraction process can be reduced substantially; the attraction and supporting process works in a current closed loop chopping mode, chopping frequency is adjusted automatically, and voice frequency noise is prevented from occurring; meanwhile, attraction and supporting currents can be kept stable in a wide input voltage range, and therefore energy-saving silent closed loop operation can be realized; a disjunction process applies direct current negative voltages to the two ends of a coil after rectification and filtration, so that the coil current is made to descend quickly, an electromagnetic system is demagnetized quickly, and the contact is disjunctive quickly at a moment before zero; the intelligent alternating current contactor also has a self correction function of zero-current disjunction, and therefore the problem that control over zero-current disjunction fails due to disperse movement of the contactor, abrasion of the contact and other factors can be solved.

A calibration device for use in a radio receiver enables receiver self-calibration and self-correction of inbound RF signals. The calibration device includes an estimation module for receiving a sample digital packet and calculating imbalance parameters as a function of a portion of the sample digital packet. The calibration device further includes a correction module for applying the imbalance parameters to a received digital packet of an inbound RF signal to produce a corrected digital packet. The received digital packet may be a portion of the sample digital packet, the complete sample digital packet or a new packet.

The invention provides a near-field calibration method for relative amplitude and phase characteristics of spherical surface array antenna channels, and aims to provide a method with few calibration source and capable of automatically performing self-correction on the relative amplitude and phase characteristics. The near-field calibration method is characterized in that: calibration frames distributed around a spherical surface antenna array plane are set up on the periphery of a phased-array antenna and a calibration frame is set up at the center of the phased-array antenna, thus a conformalspherical surface array distribution model for antenna unit approximate uniform distribution is formed; optical equipment is used for performing high-precision measurement on a coordinate position ofeach calibration antenna relative to a central point of the spherical surface array antenna, and a spatial distance and an axial included angle between each array element on the spherical surface array antenna and each calibration antenna are calculated; and a calibration reference signal generated by calibration test equipment is used for calibrating uplink/downlink channels of the spherical surface array antenna, and amplitude/phase characteristics of element antenna channels are obtained through deducting relative amplitude and phase characteristics of the antenna and amplitude/phase changes introduced by the spatial distances and axial deflection between each calibration antenna and each array element.

The invention discloses an indoor multi-mobile-robot cooperative system based on a fuzzy algorithm and two-dimensional code self correction. The system comprises multiple rotor bodies and two-dimensional codes distributed at different indoor positions. Each of the two-dimensional codes comprises a QR code which represents the position coordinate of each two-dimensional code in an indoor two-dimensional coordinate system. Each of the robot bodies is provided with a single chip microcomputer, an acceleration meter module, a gyroscope module, a two-dimensional code recognition module, a communication module, and an ultrasonic sensor. The system has the low cost, the efficient path planning can be realized, multiple robots are in cooperative operation and the conflict is avoided, and the working efficiency is high.

The invention discloses a longhole axis straightness measuring device based on self correction and a measurement method thereof. The measuring device comprises a tubular travelling mechanism and a self-centering rotary mechanism which is arranged on the front end of the travelling mechanism. In the invention, large-range measurement is realized by the travelling mechanism and the self-centering rotary mechanism and provides an effective technical means for correcting the precision of deeper bores. In addition, the self-centering rotary mechanism adopted by the invention realizes the continuous scanning of an inner section circle by the laser rotation principle, thus effectively reducing error resource and improving measurement accuracy. The measurement device of the invention can finish measuring in short time, effectively saves measurement time, has simple operation and good usability and can utilize a processor to carry out synergy processing of data so as to realize measurement automation.

The enclosed loop control system for gas fuel to jet successively in several points includes three parts of sensors, enclosed control unit (ECU) and executing mechanism. The sensors collects signals and transmits the signals to the ECU, the ECU performs precise calculation to control the operation of the executors, and the executors perform the timely and quantitative fuel jetting. In the enclosed loop control system, the ECU compares the data the oxygen sensor obtains with target value, and performs self correction and feedback correction to raise air/fuel ratio controlling precision. The timely and quantitative gas supply can eliminate fuel gas backing and fuel waste caused by gas valve superposing angle, raise the mixed gas uniformity and work homogeneity of the cylinders, improve the mixed gas controlling precision of the engine and reduce tail gas exhaust.