56results about How to "Redundant" patented technology

A semiconductor memory device able to strengthen an error correction capability, able to shorten a write time and / or a read time, able to make a redundant memory unnecessary or smaller, and consequently able to achieve a reduction of size and a reduction of cost, provided with a data input portion for receiving 1 page's worth of data, dividing it to a plurality of code words, generating and adding check code (parity data), for each code word, successively forming main code words and transferring the same to a bank (A) or a bank (B), and a data output portion for receiving 1 page's worth of data including main code words transferred from the data latch circuit, correcting the error data when there is within a predetermined number of error data for each main code word, adding the error information for read each read code word except check code (parity data), and transferring the same to a host side, and a signal processing system using the same.

The invention provides a visual guiding-based robot workpiece grabbing method, and belongs to the field of robot visual recognition and positioning. The method comprises the following steps of (1) establishing templates of target workpieces in advance, collecting images of the target workpieces, and acquiring edge feature images of the templates and edge feature images of the target workpieces; (2) acquiring the deflection angle of each target workpiece relative to the corresponding template by utilizing the minimum enclosing rectangle of the edge feature image of the target workpiece, and establishing a compensation template set by utilizing the deflection angles and the edge feature images of the templates; (3) matching the edge feature images of the target workpieces and the compensation template set, and recognizing the target workpieces and acquiring the center coordinates of the target workpieces under a visual coordinate system; (4) converting the visual coordinate system to a robot user coordinate system; and (5) selecting a reference point, and uniquely identifying the same target workpiece by utilizing the time and the position to complete positioning grabbing. The targetworkpieces can be accurately recognized by utilizing the method.

The invention an electric-energy quality data compression and reconstruction method based on self-adaptive dictionary learning, and self-adaptive dictionary learning is used for sparse representation of electric-energy quality data. A lot of different types of electric energy quality data form a training sample set, and the completeness and redundancy of the training sample set are ensured; basic atom sparse codes which can represent the electric energy quality data is extracted from the training sample set adaptively, and a self-adaptive dictionary is obtained via iteration; a random Gauss matrix is used to carry out dimension-reducing measurement on electric energy quality test signals, and compression sampling is realized; and on the basis of compressed perception theories, the self-adaptive dictionary is used for sparse solution to obtain a sparse representation matrix of test signals, and the original signals are decoded and reconstructed. Thus, the electric energy quality data is compressed and sampled simply and reconstructed accurately, the sampling efficiency of the electric energy quality data is improved, and storage of redundant data is reduced.

The invention discloses a train positioning method and system. The method comprises the following steps: acquiring an image located on a rail line through image acquisition equipment and identifying aspecific marker in the image through image processing; determining the position of a train according to the specific marker. The train positioning method and system, disclosed by the invention, the advantages of no dependence on wayside equipment, no influences caused by tunnels, high positioning precision, simple method, low engineering and maintenance cost and the like.

The invention provides a locomotive wheel set idling and sliding detection method and system. The method comprises, after initial alignment is performed, acquiring reference speed, reference acceleration and wheel speed output by a combined inertial navigation system, wherein the wheel speed is determined by speed pulse information collected by a speed sensor; according to the reference speed, the reference acceleration, the wheel speed and a preset formula, computing speed difference, acceleration difference and sliding rate; when the reference acceleration, the speed difference, the acceleration difference and the sliding rate meet preset idling judging conditions, determining that the operating state of a locomotive wheel set is an idling state; when the reference acceleration, the speed difference, the acceleration difference and the sliding rate meet preset sliding judging conditions, determining that the operating state of the locomotive wheel set is a sliding state. Therefore, the locomotive wheel set idling and sliding detection method achieves the effects of detecting whether the locomotive wheel set is idling or sliding to well ensure train safety.

Provided is a paper processing apparatus, capable of guaranteeing bigger space pf a collecting storage facility, and being continuously used when a temporary storing part is in the wrong. The paper processing apparatus has a discriminating part for discriminating the paper, a plurality of collecting storage facilities freely assembled and unassembled for collecting or sending the paper by an opening arranged on the upper surface of each collecting storage facility, the temporary storing part for collecting and sending the paper discriminated by the discriminating part, and a conveying part for conveying the paper among the parts, one of the collecting storage facilities is used as the substitute of the temporary storing part in the fault.

The invention discloses a RS485 communication system and method preventing master-slave equipment conflicts, and relates to the RS485 communication field; the method comprises the following steps: the master equipment detects slave equipment is powered up, packs the master equipment present time and time stamp into time synchronization data in a self time slot, and sends the packed data to the powered slave equipment; the slave equipment receives the time synchronization data sent by the master equipment and group packs the data, and updates the self time and time stamp according to the group packed time synchronization data until the update succeeds; the slave equipment sends the successfully synchronized response data to the master equipment in a self time slot; the master equipment receives the response data sent by the slave equipment and group packs the data, and confirms the master-slave equipment time to be successfully synchronized according to the group packed response data; the master-slave equipment send data in self gap time slots so as to avoid conflicts. The system and method allow the master equipment and slave equipment to send data in self time slots, thus effectively improving the equipment instantaneity and reliability.

The invention discloses a double-end-electrified multi-phase alternating current motor variable-frequency control device, which comprises a multi-phase alternating current motor, wherein the m head ends and the m tail ends of the stator winding of the multi-phase alternating current motor are led out to respectively connect with a multi-phase univertor, and the multi-phase univertor is formed by a direct current power supply, a filter capacitance, a multi-phase inverter and a variable-frequency controller, and the phase number m of the multi-phase alternating current motor is equal to that of the multi-phase inverter, wherein m>=5. The double-end-electrified multi-phase alternating current motor variable-frequency control device of the invention not only can realize large power by using a power electronic component with limited single-tube capacity in a larger range, but also has higher reliability as having redundancy on phase units and a system.

The invention relates to an alternating current transmission system, in particular to a vehicle alternating current transmission system, and solves the defects and the problems of a transmission way of an existing heavy track car. The system comprises a traction system and an auxiliary system, wherein the traction system consists of a first traction system and a second traction system; the first traction system and the second traction system have the same structure and independently comprise a diesel engine, a permanent magnet synchronous generator, a four-quadrant traction rectifier, a traction inverter and an asynchronous traction machine; the auxiliary system comprises an auxiliary system direct current bus which is connected with an auxiliary inverter; the direct current bus of the rectifier of the first traction system is connected with the auxiliary system direct current bus through a first DC / DC converter and a first fling-cut switch; and the direct current bus of the rectifierof the second traction system is connected with the auxiliary system direct current bus through a second DC / DC converter and a second fling-cut switch. The alternating current transmission system isespecially suitable for a GCD-1000II heavy track car and is also suitable for other vehicles.

The invention discloses a method for monitoring mine gas. The method comprises the following steps of: fusing all parameters of the same kind of sensors from different substations by using a patch estimation theory to acquire an accurate first-stage fusion result; comprehensively processing the first-stage fusion result by using a back propagation (BP) neural network; and acquiring underground environment information, and performing safety evaluation. The data of underground sensors is subjected to two-stage fusion by using the patch estimation theory and the BP neural network, so that a measuring error is reduced to a great extent, the accuracy of the data is improved, the gas distribution condition of an underground coal mine is accurately reflected, the monitoring speed and reliability of the gas are improved, and the fused sensor information has redundancy, complementarity and real-time property.

The invention provides a method and a device for determining fracture strike. The method comprises the steps of acquiring three-component seismic data comprising two-horizontal-component data and vertical-component data from multiwave seismic measurement data of the fracture strike; performing polarization analysis on the two-horizontal-component data for determining polarizing angles and polarizing angle variance; determining a feature vector azimuth angle corresponding to the maximum eigenvalue of a covariance matrix and feature vector azimuth angle variance; determining a travel time-difference azimuth angle of the vertical-component data and azimuth angle variance; performing acceleration analysis and ellipse fitting on the vertical-component data for determining an azimuth angle of an ellipse long shaft and fitting variance; performing data fusion on the polarizing angles, the feature vector azimuth angle corresponding to the maximum eigenvalue, the travel time-difference azimuth angle and the azimuth angle of the ellipse long shaft for determining a fracture azimuth angle. The method and the device have the advantages that the uncertainty of a seismic fracture measurement result is reduced, and the stability and the precision of the measurement result are improved.

The invention provides a vehicle steering control device. The vehicle steering control device comprises a steering unit which is provided with an input shaft; a steered unit which is provided with an output shaft; a clutch which is adapted for connection and disconnection between the input shaft and the output shaft; and a control unit which controls the steered unit on the basis of an input from the steering unit. The control unit controls the rotation of the output shaft so that the clutch rotates freely when the input shaft rotates. The clutch can be configured so that the clutch rotates freely when the rotational speed of the output shaft is higher than or equal to the rotational speed of the input shaft and so that the clutch is engaged when the rotational speed of the output shaft is lower than the rotational speed of the input shaft.

The invention provides a precise synchronization-unrequired coal mine underground spread spectrum accurate ranging method and a device. According to the precise synchronization-unrequired coal mine underground spread spectrum accurate ranging method, a parallel and tracking loop-free pseudo-noise code synchronization accurate measurement algorithm is adopted, such that higher time resolution can be obtained based on rough synchronization without precise synchronization process required, and therefore, ranging pseudo code speed can be decreased, and bandwidth occupied by ranging pseudo codes is limited below 100MHZ, and thus, meter-level positioning accuracy can be achieved. The device for realizing the method comprises a communication control module and a wireless response module; the communication control module, adopting a high-performance FPGA as a core processor, mainly comprises a transmitter and a receiver; and the wireless response module de-spreads received signals through adopting a search-track-free synchronization mode without a separate processor required. The precise synchronization-unrequired coal mine underground spread spectrum accurate ranging method and the device of the invention can inhibit serious electromagnetic interference under a coal mine, and are advantageous in robust hardware designs, redundant algorithms, high-accurate ranging and strong real-time property, are suitable for a coal mine underground personnel precise positioning system.

The invention discloses a barrier collision detection device, a detection system and a detection method. The collision detection device comprises a collision detection module, a positioning module, awireless communication module, a wakeup and dormancy module, a processor and a power supply module. The device has a simple structure and low energy consumption and can work for a long time. The collision detection system comprises a plurality of collision detection devices, a data storage module, a data processing module, an alarm module, a data receiving module and a front-end display module. The core of the data processing module of the system is the collision detection algorithm provided in the invention, the algorithm is simple and effective, the collision position can be positioned accurately, problems of error judgment, more judgment and the like can be effectively recognized, and redundancy is realized. The system is intuitive and automatic, and has a big data processing and analysis ability.

A data fault tolerant storage method under a multiserver environment relates to the field of distributed data storage. The method includes building an API (application programming interface), detecting server fault and synchronizing data. Detecting server fault refers to detection of whether a server in a network faults or not and is used fro detecting mainframe fault among server mainframes and separating faulted servers. Synchronizing data refers to discovery of drive state mainframes, synchronization of driven state mainframes and synchronization during operation and used for data fault tolerant synchronization among servers. By providing fault tolerant data storage service for APIs of progresses operated in servers, multiple server mainframes in a system can still provide external services when part of the servers fault, the problem of service stoppage, caused single server fault, of a small-medium size system operated in a client / server mode is solved, and certain redundancy is provided for system services.

The invention discloses a multi-parameter fusion recognition device for a broken chain fault of a scraper conveyer. The multi-parameter fusion recognition device is provided with four recognition modules which are installed at different positions of a scraper conveyer system, so that the monitoring time and space range is large; and the four parameters are fused to have the characteristics of redundancy, complementarity, real-time performance and the like, and the broken chain fault of a scraper of the scraper conveyer in the underground coal mine operation is recognized through the fusion parameters, the broken chain fault can be effectively judged, and the multi-parameter fusion recognition device has high fault tolerance and accuracy, good quickness and high reliability.

The invention discloses an intelligent network control system and a method of a fracturing device. The intelligent network control system of the fracturing device comprises a plurality of fracturing device control systems and a plurality of network switching devices which are respectively corresponding to each other and are connected with the plurality of the fracturing device control systems. A plurality of network switching device cascades compose an ethernet ringlike network. The fracturing control systems comprises programmable logic controllers and industrial control computers which are connected with the programmable logic controllers through network cards. Input ends of the programmable logic controllers are connected with sensors and the output ends of the programmable logic controllers connected with actuators. The industrial control computers connected with the network switching devices through the network cards. The method of the fracturing device comprises the following steps: 1. acquiring internet protocol (IP) address, 2. establishing a transmission control protocol (TCP) connection, 3. acquiring data in real time and sharing, 4. and processing the data. The intelligent network control system and the method of the fracturing device are simple in structure, novel and reasonable in design, convenient to realize, free and flexible in network structure, high in stability, strong in practical applicability and high in popularization and application value and can meet the need of large-scale construction.

The electric vehicle control unit comprises a constant voltage constant frequency power supply composed of two groups of inverter circuits, a filter comprising a reactor and capacitor, and a transformer, as well as contactors provided by a pair between the two groups of inverter circuits and the filter. The filter composed of the reactor and the capacitor as well as the transformer are shared by the two groups of inverter circuits. While one inverter circuit in the group is penetrating, an auxiliary contact signal of the contactor stops gate start instruction for the other inverter circuit.

The invention relates to a multi-robot relative positioning method based on multi-sensor fusion, and aims to realize a configuration sensing function during cooperative transportation of multiple unmanned aerial vehicles and provide pose information for formation keeping of a control module. According to the technical scheme, the method comprises the following steps that a single machine estimates visual poses of other unmanned aerial vehicles in a visual visible range; IMU information is fused with visual estimation and UWB ranging information; and positioning results are fused among multiple machines. Due to the fact that the cooperation identification with the determined size is adopted, the robustness, the precision and the calculation speed of visual positioning are all improved, and the observation updating frequency is increased; and the multi-sensor combined solution of IMU prediction, UWB distance measurement and visual image observation is adopted, so that the positioning precision among multiple robots is further improved, and the relative configuration of the system can be kept without relying on GPS information. The ring network topology is adopted for formation estimation, so that the system can still operate under the condition of partial observation failure, and has certain redundancy.

The invention provides a pages processing apparatus capable of being manufactured with low cost, having improved reliability and guaranteeing the wide collecting storage facility space. The pages processing apparatus has a throwing-out part (1) for throwing in or discharging the pages by one opening, a delivery part (2) for delivering the throwed-in pages into the apparatus by the opening, and delivering the pages from the inside of the apparatus to the throwing-out part (1) by the opening to discharge the pages, a discriminating part (3) for discriminating the pages, a plurality of collecting storage facilities (11-1, 11-2, 11-3, 11-4, 12-1, 12-2) for collecting or delivering the pages by one opening, and a conveying part for conveying the pages among the parts.

The invention discloses a metadata storage performance optimization method and a storage server, and belongs to the technical field of distributed storage. The method comprises the following steps: creating WAL partitions in an SSD hard disk of a storage server, wherein the number of the WAL partitions is not less than that of data disks; specifying the WAL of the OSD component created in each data disk to store and use one corresponding WAL partition in the SSD hard disk; after the data disk receives the data writing request, the OSD component accesses the SSD hard disk so as to write the WALcorresponding to the metadata into the corresponding WAL partition; according to the method, the WAL file is configured on the SSD hard disk, so that the access speed of OSD metadata can be increased, and the storage performance is improved; besides, due to the fact that the storage space occupied by the WAL file is small, the SSD hard disk is used as a system disk and does not occupy a disk slotof the server, the storage density of the storage server is kept unchanged under the condition that the storage performance is improved, and the cost of the storage server is not increased.

The invention discloses a real-time operating system VxWorks tailoring method. The method includes the first step of component-level tailoring, the second step of file-level tailoring, the third step of function-level tailoring and the fourth step of statement-level tailoring, wherein in the first step, an operating system tool is used for tailoring components not needed by an operating system; in the second step, Makefiles are combed, and files which do not need to be reserved and files which are not compiled are tailored; in the third step, calling and called relations of functions are analyzed, and the functions which are not called are tailored; in the fourth step, by means of code walkthrough and analysis, codes which are not needed are tailored. By means of the method, the problems that tailoring of the operating system is not complete and redundant codes are generated can be solved, and meanwhile system safety and reliability can be improved.

The invention discloses a false alarm and missing alarm prevention method based on a phase sensitive optical time domain reflection sensor. The method is characterized in that pulsed light with the width changing according to a fixed rule is injected into a sensing optical fiber, data acquired under different pulse widths are regarded as output of different sensors, a multi-sensor information fusion algorithm is adopted to carry out comprehensive processing on the acquired data, and according to the comprehensive processing result, whether an intrusion event happens along the sensing optical fiber is judged, and the particular intrusion event happening position is determined. The relevance and the difference between sensor data under different pulse widths are thoroughly used, while the sensor hardware cost is not increased, the false alarm rate and the missing alarm rate can be effectively reduced, the algorithm is simple, and the positioning precision is high.