42results about How to "Improve signal transmission reliability" patented technology

An apparatus and method for cooperative relay in a multiple-antenna wireless communication system based on relay stations (RSs) are provided. The apparatus includes a serial / parallel converter for dividing data into N number of streams, a channel estimator for calculating a first transmission rate at which a RS performing the cooperative relay can perform decoding and a second transmission rate at which all relay stations performing the cooperative relay can commonly perform decoding, and determining transmission rates for each of the N-number streams, and an adaptive modulation and coding (AMC) unit for encoding and modulating the N-number streams according to their respective transmission rates.

An apparatus and method for cooperative relay in a multiple-antenna wireless communication system based on relay stations (RSs) are provided. The apparatus includes a serial / parallel converter for dividing data into N number of streams, a channel estimator for calculating a first transmission rate at which a RS performing the cooperative relay can perform decoding and a second transmission rate at which all relay stations performing the cooperative relay can commonly perform decoding, and determining transmission rates for each of the N-number streams, and an adaptive modulation and coding (AMC) unit for encoding and modulating the N-number streams according to their respective transmission rates.

A conductive terminal is positioned in an insulative housing to constitute an electrical connector. The insulative housing is formed with a first face and a second face opposite to each other, and has a plurality of terminal receiving cavities extending through the first face and the second face. The conductive terminal includes a base for abutting against the corresponding terminal receiving cavity to achieve positioning. The base has two spaced-apart opposite sidewalls. Each sidewall is formed with a first edge and a second edge opposite to each other in a direction of extension of the terminal receiving cavity. A plurality of resilient arms extend outwardly from certain of the edges of the sidewalls such that the first and second contact portions of the resilient arms are respectively and electrically connected to an electronic component and a circuit board to transmit signals between the electronic component and the circuit board through the conductive terminal.

A universal serial bus connector includes a shielding case, an insulating main body, a first terminal group, a second terminal group and a grounding sheet. The insulating main body is accommodated and installed in the shielding case. The first terminal group is accommodated in the insulating main body. The second terminal group is accommodated in the insulating main body. The grounding sheet is fixed on the insulating main body. A surface of the shielding case has at least one bump. The bump is recessed inwards from the surface, such that the bump is electrically connected with the grounding sheet.

A slim phone jack is described. A height of the slim phone jack is reduced so as to reduce a height of an electric device utilized the slim phone jack. The slim phone jack has an upper cover, a lower cover and two sidewalls, and is suitable to couple to a phone plug with a spring arm. An inside of the upper cover has contact terminals. The two sidewalls form a sliding tunnel for inserting the phone plug easily. The lower cover further has a guiding slot. The slim phone jack further couples to a circuit board having a fixing slot. When the phone plug is inserted into the slim phone jack, the spring arm sticks out of the guiding slot so that a fixing edge of the spring arm couples to the fixing slot of the circuit board to fix the phone plug in the slim phone jack more strongly.

In relation to a circuit breaker, a left-side accessory switch storage section and a right-side accessory switch storage section are provided in a breaker case 1. A contact point of an ancillary switch 7 provided in one of the accessory switch storage sections is opened or closed in conjunction with an output protrusion 6a formed on an open-close lever 6 of an open-close mechanism section 3 on the main unit. A contact point of an alarm switch 9 provided in the remaining accessory switch storage section is opened or closed in conjunction with an alarm output plate 8 which operates in association with tipping action of the breaker. The output protrusion 6a is caused to oppose an operation lever 7a of an ancillary switch which is formed into a symmetrical bifurcated shape and which is provided in the accessory switch storage section. The alarm output plate constitutes a pivotal lever coupled to a toggle shaft 3a of the open-close mechanism section. An output protrusion 8a provided at the extremity of the pivotal lever is caused to oppose an operation lever 9a of the alarm switch provided in the accessory switch storage section.

Described are an optical signal coupling for two vehicles coupled with one another and a conductive coupling which contains such a signal coupling. The signal coupling has a first and a second coupling part each of which is carried by a respective one of the vehicles and between which the optical signals are transmitted. The first coupling part contains a sending device which creates the optical signals to be transmitted, and the second coupling part contains a receiving device which detects the transmitted optical signals.

A driving apparatus and a driving signal generating method are provided. The driving apparatus includes a timing controller, a driver, a switch and a resistor. The timing controller generates a bi-direction lock signal. The driver receives a differential signal pair. The switch is turned on or cut off according to an eye diagram detection result of the differential signal pair. According to the bi-direction lock signal, the timing controller and the driver are used to: operate a first clock and data recovery (CDR) operation on the differential signal pair during a first time period; set setting parameters of an output differential voltage, a pre-emphasis circuit and an equalizer according to the eye diagram detection result and an on / off state of the switch, and perform a second CDR operation during a second time period; and drive a display according to the differential signal pair during a third time period.

The embodiment of the invention provides an electromechanical actuator and a control method thereof, and belongs to the technical field of electromechanical servo. The actuator comprises a first motorassembly, a second motor assembly, a first actuating rod and a second actuating rod, wherein the first actuating rod is driven by the first motor assembly, the second actuating rod is driven by the second motor assembly, the first actuating rod is of a hollow structure, the first actuating rod and the second actuating rod move relative to each other under driving of the first motor assembly and / or the second motor assembly, and the second actuating rod partially moves in a cavity of the first actuating rod. By the actuator, dual-redundancy control can be achieved, a normal working mode and abackup working mode can be set, and switching between the working modes is performed according to a special fault; and compared with a hydraulic servo system and an electromechanical hydrostatic servosystem, the actuator has the advantages that the actuator has more flexible and reliable redundancy management mode, and the problem of a fault caused by a roller or a ball screw which is stucken isprevented.

The present disclosure discloses methods and devices for an optical signal encoding and decoding. The optical signal encoding method includes: reading N-ary data bit by bit, and encoding the data into electric signal units: encoding each different digit in the N-ary data into a different electric signal unit, where high level duration and low level duration in the electric signal unit are Ti1, Ti2, . . . , and Tij respectively, i, j, and N are natural numbers, and the different electric signal units are separated by delimiters; and combining the electric signal units corresponding to the N-ary data into a drive signal, where the drive signal is used for being output in a light form. Instable flashing of emitted light of a terminal device is overcome effectively, and information transmission reliability is further improved.

The invention relates to the field of information acquisition, and in particular to an injection molding machine capacity acquisition system which comprises a data acquisition device, a processing device, a remote control terminal and a communication device, wherein the data acquisition device is used for acquiring various parameters of an injection molding machine, and environment parameters; the processing device is used for processing acquired data; the remote control terminal is adopted for remote control; the communication device is used for enabling the processing device to communicate with the remote control terminal; the data acquisition device comprises an acquisition card which is connected with an injection molding machine PLC and used for acquiring various data, a calibration module for calibrating an acquisition module, a display for displaying acquired data in real time, buttons for setting parameters of the acquisition card, and a power supply for supplying power. The injection molding machine capacity acquisition system is good in data processing property, high in acquisition precision, good in timeliness, low in operation cost and convenient in large-scale popularization and application.

The invention provides a centralized mounting bracket for avionics equipment. Centralized and fast loading and unloading of multiple avionics equipment can be achieved. The centralized mounting bracket includes a fast loading and unloading mechanism, a damping mechanism, a ventilating and cooling pipeline, and a communication channel for communication between equipment as well as between a systemand an aircraft. The fast loading and unloading mechanism comprises fasteners and spring positioning pins which are arranged on the centralized mounting bracket, and a locking handle on the avionics equipment. The damping system consists of six dampers, the vibration magnitude of the avionics equipment can be effectively decreased, and the reliability of the system is improved. The ventilating andcooling pipeline includes an air inlet pipe, an air cavity, a ventilating pipe and a sealing ring and can provide air cooling conditions for the avionics equipment, the working temperature of internal electronic components can be effectively adjusted, and the working reliability is improved. The communication channel for communication between equipment as well as between the system and the aircraft comprises circular connectors mounted on a back shell and a left shell of the centralized mounting bracket and a rectangular connector mounted on a front cover plate, and communication connection between equipment as well as between the system and the aircraft is achieved.

The invention provides a large-mining-height stope coal wall rib spalling depth measurement method, which is suitable for coal wall rib spalling depth monitoring and prevention under a large-mining-height condition. The method is characterized by selecting one rib spalling measurement point every a certain distance on a large-mining-height working face; mounting a glass fiber reinforced plastic anchor rod uniformly provided with fiber grating sensors on a coal wall; carrying out real-time transmission data analysis through a computer to obtain stress and its variation of each section of the anchor rod; and according to the phenomenon that the anchor rod section corresponding to the rib spalling section decreases in stress, obtaining depth range of the rib spalling. The method monitors therib spalling depth on the basis of preventing coal wall rib spalling, and provides favorable conditions for safe and efficient mining of the large-mining-height working face.

An optical rotary transmitter which ensures the reliable transmission of optical signals in conjunction with a comparatively simple construction comprises two parts spaced apart from one another which are rotatable relative to one another about a common centre axis and the first of which comprises a first circular light coupler (10) and the second of which comprises a second circular light coupler (20). The light entrance and light exit surfaces of the two light couplers face one another. Each of the light couplers (10, 20) consists of collimators (11, 21) combined to form a respective collimator arrangement (16, 26), optical coupling elements (15, 25) being connected to said collimators.

The invention relates to the field of information acquisition and particularly relates to a capacity acquisition system for a die casting machine. The capacity acquisition system comprises a data acquiring device, a processing device, a remote control terminal, a communication device and an executing device, wherein the data acquiring device is used for acquiring each parameter of the die casting machine; the processing device is used for processing the acquired data; the remote control terminal is used for remote control; the communication device is used for communication between the processing device and the remote control terminal; the executing device is connected with the processing device so as to be remotely controlled by the remote control terminal; the data acquiring device comprises an acquisition card, a calibration module, a cache module, a displayer, keys and a power supply, wherein the acquisition card is connected with a die casting machine PLC (Programmable Logic Controller) and is used for acquiring all the data; the correction module is connected with the acquisition card and is used for calibration; the cache module is connected with the acquisition card and is used for data cache; the displayer is connected with the cache module and is used for displaying the acquired data in real time; the keys are connected with the acquisition card and are used for parameter setting; and the power supply is used for supplying power. The capacity acquisition system provided by the invention is high in data processing capacity, high in acquisition precision, high in timeliness, low in operating cost and convenient for large-scale popularization and application.

The invention provides an architecture for improving the reliability of a multi-server system. The architecture comprises a hard disk backboard, multiple server nodes, a power connection board and multiple hard disks. The hard disk backboard is provided with hard disk modules, wherein the number of the hard disk modules corresponds to that of the server nodes. The power connection board is connected with power supply isolation units of the hard disk modules, so that power supply of the hard disk modules is isolated. The server nodes are connected with signal isolation units of the hard disk modules, and each server node is in data communication with at least one hard disk through the corresponding hard disk module, so that each server node, the corresponding hard disk module and the corresponding hard disks form an isolation data communication group, and the isolation data communication groups are isolated. Hard disk power supply, signals and management lines are arranged in an isolated mode, so that it is avoided that the fault of a hard disk line controlled by one server node leads to a system fault, and the reliability of the hard disk backboard is improved.

A circuit board includes a first substrate, a second substrate, a third substrate, a plurality of conductive structures and a conductive via structure. The second substrate is disposed between the first substrate and the third substrate. The third substrate has an opening and includes a first dielectric layer, a second dielectric layer, and a third dielectric layer. The opening penetrates the first dielectric layer and the second dielectric layer, and the third dielectric layer fully fills the opening. The conductive via structure penetrates the first substrate, the second substrate, the third dielectric layer of the third substrate, and is electrically connected to the first substrate and the third substrate to define a signal path. The first substrate, the second substrate, and the third substrate are electrically connected through the conductive structures to define a ground path, and the ground path surrounds the signal path.

The invention relates to a quick junction box for optical cables, comprising a base, a fiber fusion disc mounted on the base through a support and an enclosure packaged on the base and receiving the fiber fusion disc; an optical cable incoming wire and an optical cable outgoing wire run through and are fixed to the base respectively, the base is also fitted with a fiber flange fixture, a plurality of fiber flanges are mounted on the fiber flange fixture, optical cable incoming wire fiber cores are each in fusion connection with one single-end jumper fiber on the fiber fusion disc, the single-end jumper fibers are correspondingly connected to top ends of the fiber flanges respectively, optical cable outgoing wire fiber cores are in corresponding connection with the bottom ends of the fiber flanges, and the enclosure or the base is fitted with a humidity sensing alarm device. The quick junction box is simple in overall structure, stable and reliable, and convenient to maintain, the difficulty in cable laying construction can be greatly reduced, signal transmission reliability can be greatly improved, and working efficiency can be improved.

An assembly device for a computer case and outer cover incorporating: a host case provided with a bottom plate and perpendicular left and right side walls, a circuit motherboard fixed within the holding space, a jack panel of relatively small area and size is located at a tail end of the circuit motherboard, and an electrical circuit is printed on an inverse side of the jack panel; a rectangular outer cover, the outer cover can be assembled / disassembled to / from the rectangular gap of the host case, and the jack panel can be plugged into or withdrawn from the socket, thereby realizing a rapid and convenient method of assembling and disassembling the outer cover to and from the host case.

The invention relates to a modularized primary and secondary equipment double-layer prefabricated cabin that is characterized by comprising an upper-layer prefabricated cabin, a lower-layer prefabricated cabin, a wiring unit and an environment control system; the upper-layer prefabricated cabin comprises a plurality of modularized secondary cabin bodies and comprises a plurality of module cabin bodies; the lower-layer prefabricated cabin comprises a plurality of modularized primary cabin bodies and also comprises a plurality of module cabin bodies; the wiring unit is a multi-channel three-dimensional wiring unit; the environment control system comprises an upper-layer environment control system and a lower-layer environment control system. The upper layer and the lower layer of the double-layer cabin body are of a modular split structure, large-scale production, integrated debugging and modular distribution in a factory are achieved, cost is reduced, and the problems that an original cabin body is large in non-standard machining amount, long in construction period, large in occupied area, high in cost and large in field operation and maintenance workload are solved.

The invention relates to a transmission scheme for a cooperative communication system with carrier frequency deviation, and belongs to the wireless communication field. The invention aims to solve the problem that reliability of signal transmission is decreased dramatically due to the carrier frequency deviation existing in the cooperative communication system, and provides a frequency reversal encoding scheme and a zero-forcing decoding method with low complexity. The core part of a main algorithm of the frequency reversal transmission scheme is characterized in frequency reversal of encoding codes, so that an equivalent channel matrix between a relay node and a target node in the cooperative communication system is a complex orthogonal matrix, and the target node can restore and transmit a signal correctly by processing the received signal simply. Through comparing with the existing method at present, the frequency reversal transmission scheme provided by the invention makes the reliability of the cooperative communication system higher and the decoding complexity lower.

An output shaft of a transmission is fixed to a planetary gearset carrier. Output torque is measured via a surface acoustic wave sensor affixed to a face of the carrier between two adjacent planet gears and radially inside a weld joining the carrier face to an opposite carrier face. In this location, the level of strain at typical transmission output torques produces a level of strain within the measuring range of a surface acoustic wave sensor. The sensor may be powered and signals communicated across an air gap defined by signal rings. Due the stable position and orientation of the carrier, a small, consistent air gap is possible.

A circuit board includes a first dielectric material, a second dielectric material, a third dielectric material, a first external circuit layer, a second external circuit layer, multiple conductive structures, and a conductive via structure. Dielectric constants of the first, the second and the third dielectric materials are different. The first and the second external circuit layers are respectively disposed on the first and the third dielectric materials. The conductive via structure at least penetrates the first and the second dielectric materials and is electrically connected to the first and the second external circuit layers to define a signal path. The conductive structures are electrically connected to each other and surround the first, the second and the third dielectric materials. The conductive structures are electrically connected to the first and the second external circuit layers to define a ground path surrounding the signal path.

The invention relates to an automatic flight control device, which adopts a dual-channel full-digital design and communicates with an automatic flight control computer through an HB6096 bus interface.The automatic flight control device comprises a panel combination unit, a power supply unit, an interface encoding and decoding unit, a core processing unit, a channel logic and input and output unit, a display driving and backlight unit. The device adopts the double-channel full digital design, the usability, testability and task reliability of the automatic flight control device are greatly improved; the electrical interface adopts a bus interface to replace the traditional discrete quantity interface, so that the interface is simple, the signal transmission reliability is improved, and theweight is reduced; and a combined knob is adopted, so that the panel is simple, and the man-machine work efficiency is improved.

The present invention relates to a communication technology, the objective of the invention is to effectively utilize discrete spectrum. The transmission reliability and the data rate of the wirelesscommunication system are improved; the invention provides a transmitting end of a multi-frequency sub-channel array communication system, a receiving end and a system. The technical scheme can be summarized as follows: a plurality of frequency bands are utilized to transmit signals with the same reduced amplitude, and signal energy from different channels is aggregated through coherent combination, so that the received signal-to-noise ratio and the signal transmission reliability are improved, the data transmission rate and capacity are improved, and the method is suitable for an array communication system.