51 results about "Time division switching" patented technology

In a detection and ranging apparatus that performs direction-of-arrival estimation using a sensor array and that enlarges an effective aperture using a plurality of transmitting sensors, adverse effects associated with time division switching are eliminated, achieving high-accuracy measurement. A transmitter wave is spread in modulators by using mutually orthogonal codes, and the resulting transmitter waves are radiated from two transmitting sensors. Signals received by receiving sensors are each split by a splitter into two parts, which are then respectively despread in a demodulator by using the same codes as those used in the transmitter.

The present invention provides a virtual machine system and a method for switching hardware devices thereof. In the virtual machine system, the hardware devices are classified into all-time sharing devices, time division switching devices and all-time exclusive devices based on using fashions. For the time division switching devices, the method for switching hardware devices is adopted, comprising steps of: upon system switching, sending a corresponding switching signal to a device model (DM) module corresponding to a foreground Guest OS and a DM module corresponding to a background Guest OS; the DM module corresponding to the foreground Guest OS releasing the hardware devices from its device space; the DM module corresponding to the background Guest OS adding the hardware devices released by the DM module corresponding to the foreground Guest OS to its device space. It is possible to implement switching of hardware devices among different Guest OSs by the system and method of the invention.

The invention relates to a hemispherical resonant gyro fully differential control system and control method based on time division multiplexing. The control system comprises an electrode driving detection time division switching module, a sensing signal amplitude-phase demodulation module, an error parameter identification module, a working mode switching module, a control parameter calculation module, a time sequence period calculation module, a mode switching calculation module, a driving signal modulation synthesis module and a measurement output module. The sensing signal amplitude-phase demodulation module and the error parameter identification module form an error signal resolving module. The control parameter calculation module, the time sequence period calculation module and the mode switching calculation module form a data calculation unit. By means of time-sharing switching and two-rotation sensing mode difference of driving detection electrodes, gyro output error terms can be counteracted and inhibited, and the control precision of each control loop and stability of the performance of a hemispherical resonant gyro can be guaranteed.

An illuminating device comprises a first light source in which LED chips are arranged in an array shape and a second light source in which LED chips are arranged in an array shape. The two light sources of each illuminating device are arranged such that the main light-emission optical axes of the light sources are perpendicular to each other. Moreover, a time-division switching mirror is provided at a crossing position between the main light-emission optical axes. The first light source and the second light source alternately emit pulses of light. The pulsed emission is a method of supplying a large amount of electric currents to the LED chips in a short time period, and a light-emitting amount increases compared to a steady-state emission of the LED chips. The time-division switching mirror becomes a transmitting state when the first light source is lighted, and becomes a reflecting state when the second light source is lighted.

The invention relates to an ROF (Radio Over Fiber)-based novel base station feedback receiving and transmit-receive calibrating multiplexing circuit. The multiplexing circuit comprises a BBU module and an active antenna module, wherein an RF (Radio Frequency) small signal subjected to digital signal processing of the BBU module is coupled with an analog optical fiber for transmission through TRX channels of eight RF transceiver circuits and an analog optical module; a TDD (Time Division Duplex) time-division switching signal of the BBU module is transmitted to the active antenna module; the active antenna module amplifies the RF small signal through a power amplifier (PA) and then covers the amplified signal, an antenna coupling disc provides a coupling channel for transmit-receive calibration, and the switching state is selected according to the TDD property. The ROF-based novel base station feedback receiving and transmit-receive calibrating multiplexing circuit has the benefits that by utilizing the ROF technology, smooth capacity expansion can be realized without replacing devices, and the interface part has no cost increase. The ROF-based novel base station feedback receiving and transmit-receive calibrating multiplexing circuit adopts the switching manner to realize multiplexing of the feedback receiving and transmit-receive calibrating circuit according to the transmit-receive time division property of the TDD system, thereby simplifying the circuit and lowering the cost.

The invention discloses a matrix type visual detection system and method for detecting a defect of a transparent material. The visual detection system comprises a supporting device, a detection unit,a conveyance device, a controller and a digital image processing device, wherein the supporting device is used for mounting and fixing the detection unit; the detection unit comprises at least one setof imaging matrixes and at least one set of illumination matrixes; the conveyance device is used for enabling the transparent material and the detection unit to generate relative movement; the controller is connected with the at least one set of imaging matrixes and the at least one set of illumination matrixes, and is used for controlling the time-division switching of the at least one set of illumination matrixes to realize the conversion of illumination modes and the at lease one set of imaging matrixes to carry out continuous scanning when the transparent material is illuminated to obtainthe imaging data of each channel; the digital image processing device is connected with the controller and the at least one set of imaging matrixes in a communication manner, and is used for generating a control instruction to the controller and receiving multi-channel image data generated by the at least one set of imaging matrixes. The capture of the multi-channel image data, in different illumination modes, of a surface and/or internal defect of the transparent material is realized in the manner of the imaging matrixes.

The invention discloses a system and a method for identifying multiple RFID tags in a sealed metal environment. The system comprises a control module and an RFID reader-writer, wherein the control module is connected with the RFID reader-writer, a locking apparatus of a sealed metal device and a remote server, and is used for user identity recognition and authentication, RFID tag registration and management, and remote server information transmission and reception; the RFID reader-writer is connected with the control module and an UHF antenna group, and is used for blind area monitoring, UHF antenna time division switching, RFID tag collision detection and RFID tag identification; the UHF antenna group comprises two or more UHF antennas; each UHF antenna is connected with the RFID reader-writer; and the RFID tags are attached to to-be-managed articles. According to the system and the method, the design of the antennas reliably working in the sealed metal environment is realized, the sensitivity of the RFID tags to the environment and the mutual interference of short-distance adjacent tags are overcome, the difficult problem in static and effective identification of densely stacked articles in a sealed metal space is solved, and the misreading rate and the missing reading rate of the RFID tags are reduced as far as possible.

The digital time division switching-network includes series/parallel conversion module, digital memory matrix, parallel / series conversion module, module for converting m frames to one frame, multiplexer, handshaking control memory, splitter and module for converting one frame to m frames. Time slots at same position in multiple frames constitutes a time slot with width mx8 bit to be switched. Thus, size of switching matrix is reduced to 1/m2 of original size. Time division non-blocking switch in large capacity signal T structure can be realized so as to raise reliability. The invention is applicable to data communication network.

The invention relates to a signal transmission method applicable to a satellite communication system, which belongs to the technical filed of mobile satellite communication. The invention is characterized in that the method comprises the following steps: setting the down frequency from a satellite transponder to a user terminal as f1, and setting the up frequency from the user terminal to the satellite transponder as f2 which is different from f1; adopting a time division multiplexing mode for distinguishing N different user groups by the satellite transponder, wherein each user group can contain a plurality of users; sequentially dividing a down link frame into N time slots to be distributed to users of corresponding user groups to use; setting the time intervals beyond the time slots ofthe down link frame occupied by the up link frame, and adopting a multiple access mode of CDMA or FDMA; after the up link frame to be transmitted to users positioned in f2 is received and processed by the satellite transponder, transmitting the up link frame to be transmitted to users to the user terminal in f1 at the corresponding time interval; and receiving the down link frame corresponding part positioned in f1 by the user terminal at the corresponding time interval. When in use, a time division switching switch realizes the switching between the receiving of the down link frame and the sending of the up link frame and the signal insulation.

The invention discloses an emergency power supply system with an output time-division switching function. The emergency power supply system comprises commercial power AC, an input breaker QFA, a charger U, a storage battery GB, an inverter UI, an isolation transformer T, a first contactor KM1, a second contactor KM2, and an intelligent power distribution module. The commercial power AC is connected with the input breaker QFA. The output of the input breaker QFA is divided into two paths: one path is connected with one end of the first contactor KM1, the other end of the first contactor KM1 is connected with the intelligent power distribution module, and the other path is connected with the input end of the charger U. The output end of the charger U is connected with a node between the storage battery GB and the inverter UI. The inverter UI is connected with one end of the second contactor KM2 through the isolation transformer T. The system has a battery monitoring function, is capable of dynamically prolonging the standby time of loads according to actual conditions of the loads, and meets the demand that different loads need different emergency time.

The invention discloses a single beam time-division switching module for a laser spot welding processing system. The single beam time-division switching module is characterized in that the single beamtime-division switching module comprises an input energy transferring optical cable, an optical collimator, a light beam switcher, two or more output couplers and output energy transferring optical cables, wherein the output energy transferring optical cables communicate with the output couplers. The input energy transferring optical cable is connected to the optical collimator through an input energy transferring optical cable adapter head. A first optical channel is formed inside the optical collimator. A collimating lens is arranged inside the first optical channel. The optical collimatorcommunicates with the light beam switcher. The light beam switcher is provided with an optical gate and a rotatable reflector and communicates with the output couplers. The output couplers are each provided with a third optical channel, and focusing lenses are arranged in the third optical channels. Each output coupler communicates with the corresponding output energy transferring optical cable through an output energy transferring optical cable adapter head. By means of the single beam time-division switching module, the technical effect of time-division switching for light beams of a quasi-continuous optical fiber laser and a semiconductor laser is achieved.

The invention discloses a method for implementing XML data information exchange, which comprises the following steps of: defining an XML information packet into two parts, namely an information packet head and service data, wherein the information packet head at least comprises source address ID and destination address ID information; embedding the XML information packet into an information field part for link layer protocol-high data link control (HDLC); establishing a correspondence list between the source address ID and destination address ID information which is contained in the XML information packet head and address information in an HDLC frame structure, and filling an address field in the HDLC frame structure according to the correspondence list so as to form an HDLC frame; and establishing virtual connection corresponding to the XML source address ID and destination address ID and the HDLC address through selected time slots, and implementing the XML data information exchange by using a time division switching mode. The technical scheme of the invention provides a favorable way for hardware of information exchange technology in the electronic commerce and promotes the popularization and application of the electronic commerce.

The invention provides a kitchen waste processor high overload brushless DC motor driving system, which comprises a first subtractor, a PI regulator module, a time division switching control module, asecond subtractor, a PI regulator module, a PWM commutation control module, an electronic flywheel-based energy storage device module, a high overload coefficient BLDC module, a pulverization systemmodule, a Hall sensor module, a phase current calculation module and a speed calculation module. The invention also provides a driving method for the kitchen waste processor high overload brushless DCmotor which is realized by the electronic flywheel-based energy storage device module and the high overload coefficient BLDC module. The short-time maximum load torque is adopted to design the maximum torque of the motor, a high overload coefficient is selected to design the rated torque of the motor, a specially-designed capacitor capacity group, short-time heavy-duty pulverization drive is realized, and the short-time high overload coefficient load characteristic is achieved; and compared with the existing kitchen waste processor motor driving system, the motor driving system provided in the invention has the advantages of small size and low cost.

The invention is a circuit module for realizing high speed time division exchange, composed of an odd data memory, an even data memory, a control memory, a selector and a time sequence circuit. The synchronized 16-bit parallel data are written the odd and even data memories according to sequential addresses generated by the time sequence circuit, the control memory is written with data according to the address sent from the processor and red with data according to sequential address generated by the time sequence circuit. The output data of the control memory acts as read addresses of the data memories, thus achieving the purpose of time gas exchange. The two data memories both output a 16-bit data, and it obtains 16-bit parallel data exchanged by the selector. Thus, it solves the actual problem of single clock cycle realizing double-time gap exchange in high speed high-capacity SDH crossing. It can reduce circuit power consumption, and has high work reliability, beneficial to increasing the yield of IC chips.

A method for intercepting multi path fax in real time comprises the main control unit, the relay interface unit, the digital time division unit, the audio processing unit and the fax intercepting unit. Connects the up and down stream data relative to the user monitored and calling to the relay interface unit; makes connection to the audio processing unit; the audio processing unit makes linear overlap for the up and down stream data, then output digital time division switching unit; the main control unit controls the digital switching unit to make connection for the overlapped linear data outputted by audio processing unit to the fax intercepting unit, and orders the fax intercept unit to start to intercept the fax; the fax intercepting unit starts to transmit data.

The invention discloses a satellite-borne low power consumption light beacon system based on a micro/nano satellite and an implementation method thereof. The solution provides an optimization method for the beam opening angle and power of a semiconductor laser; combined coverage on a ground target observation area is realized and redundant backup is effectively performed by using three methods including the optimization method, a lamp bank distributed array design for improving output light power and different installation angles by using lamp banks composed of single beacon lamps (beam optimized semiconductor laser) and a coverage design of a beam overlapping area; and directional time division switching logic is adopted between the lamp banks, on-off logic control is performed by using longitudes and latitudes of sub-satellite points in real time, overlapping design is adopted for the on-off time between the front and back lamp groups, and these measures greatly reduce the power consumption of the system while ensuring continuous coverage on the target area. The invention mainly solves the problem of satellite-borne high-brightness active lighting beacons, and provides a solution for effectively reducing the power consumption and having high reliability; and particularly, the system expands the in-orbit application field of micro/nano satellites, and thus has important scientific significance and promotion value.