25 results about "Multiplexer" patented technology

The invention discloses a soot-blowing control device for a boiler furnace based on heat flow online measurement, which comprises a heat flow sensor, a multiplexer, a data collector and an industrial personal computer, wherein the heat flow sensor is arranged on a film-type water wall fin at the periphery of the boiler furnace and connected to the input end of the multiplexer and used for transmitting collected heat flow to the multiplexer; the multiplexer is sequentially connected with the data collector and the industrial personal computer and used for multi-channel switching, signal amplifying and filtering; the data collector is used for converting a heat flow analog signal to a digital signal; and the industrial personal computer is used for analyzing the digital signal transmitted from the multiplexer and sending a soot-blowing signal. The invention can be used for various coal-fired power plants; and according to fouling conditions of heating surfaces in each region of the boiler furnace, realizes the sweeping in a demand quantity for the required region, improves the accuracy and the real time of fouling diagnosis for the heating surfaces of the boiler furnace, reduces the boiler failure, prolongs the lifetime of a soot-blower, saves the maintenance workload of the soot-blower, and the like.

The invention relates to a space-borne microwave atmospheric sounding instrument, which comprises feed sources, calibration bodies, a motor, plane mirrors, parabolic reflectors, a scanning drive control module, multiplexers and receiver units. The motor is controlled by the scanning drive control module to drive the plane mirror to rotate. The plane mirrors reflect received electromagnetic wave signals to the parabolic reflectors in the form of plane waves by scanning the atmosphere and the calibration bodies. The parabolic reflectors realize secondary reflection to enable the plane waves to be reflected to the corresponding feed sources arranged opposite thereto. The multiplexers are used for separating the frequency of the electromagnetic wave signals received by the feed sources respectively. Each receiver unit comprises a plurality of receivers parallel with the output end of the corresponding multiplexer, and is used for receiving the electromagnetic wave signals matched with the frequency thereof. The space-borne microwave atmospheric sounding instrument has the advantages of being high in performance, high in integration, low in weight and low in power consumption.

A control device for a DC-DC converter includes a PWM controller for generating a PWM signal to a switch module of the DC-DC converter according to a feedback signal of the DC-DC converter, a logic circuit for generating a selection signal according to a magnitude of an output current of the DC-DC converter, and a multiplexer coupled to a plurality of voltages for selecting one of the plurality of voltages to be a supply voltage according to the selection signal.

The invention relates to a fiber laser. An all-fiber dual-ring laser is formed by a semiconductor laser, an active fiber, a wavelength division multiplexer, a polarization controller, a fiber isolator and a saturable absorber based on graphene. The fiber laser is characterized in that the saturable absorber is shared to realize the output of dual-wavelength synchronous Q-switched pulse. The fiber laser is low in energy loss, compact and simple in structure and simple and convenient in operation, and has extremely great application advantages in fiber communications, non-linear frequency conversion, multi-wavelength pumping detection spectrums and Raman scattering spectrums.

The invention discloses a broadband microwave frequency source circuit with low phase noise. The reference frequency is input into a digital phase detector and a low phase noise amplifier respectively. The output end of the digital phase detector is connected with the input end of a passive loop filter, and the output end of the passive loop filter is connected with the first end of a plurality ofactive loop filters respectively. The output of the low phase noise amplifier is connected to the input of the sampling phase detector. The output of the sampling phase detector is connected to the input of the first set of multiplexers, the output terminals of the first group of multiplexers are respectively connected with the second terminals of a plurality of active loop filters, the third terminals of the plurality of active loop filters are respectively connected with the input terminals of the second group of multiplexers, the output terminals of the second group of multiplexers are respectively connected with a plurality of VCOs, and a plurality of VCOs select one output. The selected VCO output signal is fed back to the sampling phase detector as the system output and fed back tothe digital phase detector through the N divider. The invention realizes the effects of wide frequency band and low phase noise.

A radio frequency circuit includes a multilayer substrate, series arm circuits in a first path connecting the input/output terminals (T1 and T2) on the multilayer substrate, a parallel arm circuit in a second path connecting a node on the first path and a ground, a wiring A on the multilayer substrate connected to the input/output terminal (T1) as a part of the first path, a wiring B on the multilayer substrate connected to the input/output terminal (T2) as a part of the first path, and a wiring C on the multilayer substrate as a part of the second path. The parallel arm circuit includes an impedance variable circuit, the wiring A and the wiring B in a layer different from the multilayer substrate. When viewed in a plan view, the wiring C does not overlap with the wiring A and the wiring B.

The present invention relates to laser technology and nonlinear optical field, and provides an all-fiber femtosecond laser aiming at the shortcomings of existing lasers such as average output power, low peak power, high mode-locking threshold, wide pulse or complex structure. The laser includes pump light source, wavelength division multiplexer, gain fiber, low dispersion small mode field nonlinear fiber, polarization beam splitter, band pass filter and polarization controller. The mode field diameter of low dispersion small mode field nonlinear optical fiber is <= 4. 2 [mu]m; The bandpass filter comprises a polarization dependent isolator, a polarization maintaining fiber and a polarizer. Polarization-dependent isolator fused to the polarized optical axis of the polarization-maintaining optical fiber at an angle of 45 DEG; A wavelength division multiplexer, a gain optical fiber, a low dispersion small mode field nonlinear optical fiber, a polarization beam splitter, a polarization dependent isolator, a polarization maintaining optical fiber and a polarizer are sequentially connected to form an all optical fiber ring cavity; A polarization controller is located between the polarization beam splitter and the polarization dependent isolator and/or between the polarizer and the wavelength division multiplexer.

The invention discloses a photonic chip and a preparation method thereof. The chip includes a lithium niobate film modulator array (1), a first optical coupling array (2) and a silica waveguide wavelength division multiplexer (3), the lithium niobate film modulator array (1) is composed of one or more lithium niobate film modulators and used for modulating light signals; the first optical couplingarray (2) is composed of one or more first optical coupling structures, one ends of the first optical coupling structures is connected to the corresponding lithium niobate film modulators, and the other ends of the first optical coupling structures is connected to the silica waveguide wavelength division multiplexer (3) to transfer the modulated light signals to the silica waveguide wavelength division multiplexer (3); and the silica waveguide wavelength division multiplexer (3) is used for wavelength division multiplexing to the modulated light signals. Single chip integration of an on-chiplithium niobate film modulator and an on-chip wavelength division multiplexing structures is achieved, and part integration is improved.

A telemetry base receives signals from at least one telemeter implanted in at least one animal. The base includes the following: a. a plurality of antennae to receive radiofrequency (RF) signals from the telemeter(s); b. a plurality of multiplexers connected to the antennae to increase the RF signal strength; c. at least one receiver circuit capable of processing RF signals from the antennae into electrical impulses; d. a central processing unit (CPU) to receive and process the electrical impulses into at least one parameter such as temperature; e. at least one digital address bus connected to the CPU and the multiplexer to select the antenna based on the best signal integrity of the antenna; f. a display to show the current parameters from the telemeters for analysis by the operator; and g. at least one analog-to-digital interface for receiving data from other external sensors.

The invention discloses a device for placing an optical communication module in an aerospace environment. The device comprises a hexahedron chassis, four surfaces of the hexahedron chassis are integrally formed, the other two surfaces are respectively an upper cover plate and a front panel, a support plate is arranged in the hexahedron chassis, and the support plate is parallel to a bottom plate in the hexahedron chassis. A wavelength division multiplexer and a wavelength division demultiplexer are fixed on the support plate, a group of mounting grooves are formed in a bottom plate in the hexahedron chassis, a heat dissipation boss is arranged beside the mounting grooves, a circuit board is arranged between the heat dissipation boss and the support plate, and a group of screw seats with internal threads are arranged at the periphery of the heat dissipation boss. A group of fixing holes corresponding to the screw seats are formed in the circuit board; and a group of connector mounting holes are further formed in one side plate of the hexahedral chassis. The device is low in cost and compact in structure, and can improve the heat dissipation effect of electronic components in the aerospace optical communication module.

The invention relates to the technical field of communication, and particularly discloses a wavelength division multiplexing technology-based multiplexer for an optical fiber multiplication system. A multiplexer body is fixedly connected with a lower shell, an upper shell is hinged with the lower shell, two clamping blocks are fixedly connected with the corresponding upper shell and lower shell respectively and are positioned on one side of the corresponding upper shell and lower shell respectively. The lower shell is provided with two first grooves, each first spring is fixedly connected with the lower shell, the two blocking pieces are fixedly connected with the corresponding first springs respectively, the lower shell is further provided with a second groove, the second groove is communicated with the two first grooves, and the limiting assembly is arranged in the second groove. According to the arrangement of the structure, when the upper shell and the lower shell are closed, studs can be omitted, the studs are prevented from sliding, the difficulty of disassembling the upper shell and the lower shell is increased, and meanwhile the upper shell and the lower shell can be opened without tools.

The invention discloses an implementation method and a system of a multiplexer. The method comprises the steps of putting data to be sorted into different registers respectively; reading the data inthe registers respectively; solving a minimum value in the data to obtain minimum value data and a position corresponding to the minimum value data; respectively storing the minimum value data and theposition corresponding to the minimum value data into a shift register; judging whether the cycle index is smaller than a preset value, and the cycle index is the frequency of solving minimum value data; if the cycle index is smaller than the preset value, eliminating a register where the minimum value data is located, and continuing to calculate the minimum value in the data; and if the cycle index is greater than or equal to the preset value, stopping the cycle to obtain sorted data. According to the method, the actual sorting operation is replaced by obtaining the minimum value, and the minimum value obtained each time is subjected to shift register by the shift register, so that logic resources consumed by the method are few, the calculation delay and the logic resources are well balanced, and the cost is greatly reduced.

The invention provides an online automatic tidying system for test points of RODIP chains and swinging rod chains. The system comprises a wheel brush, a motor, an air cylinder, a sliding rail and the like, wherein the motor performs synchronous reciprocating motion on the sliding rail, and a button panel is convenient for adjustment and selection; a state display device is used for displaying a working state of a machine; a first differential amplifier is used for connecting an MCU (microprogrammed control unit) with remote equipment to guarantee reliable communication; a multiplexer is connected with the MCU and used for selecting a second differential amplifier or a photoelectric synchronizer. The rotating wheel brush is utilized to clean the test points of the chain links under the driving of the motor, and the cleaning effect is improved.

The invention discloses a multifunctional multiplexer of a scatter communication system. The multifunctional multiplexer is composed of parts including a simulation user module, a media compression module, a main controller module, a scatter modem interface module and the like. The scatter modem interface module is responsible for protocol processing of the overall multifunctional multiplexer andservice adaptive transmission processing of an equipment channel of the overall equipment. A sent frame structure is dynamically adjusted according to the current voice usage time slot occupation condition. Once adjusting of a sending end is completed, a receiving back end dynamically adjusts the received frame structure according to the frame structure condition of the sending terminal, and thenthe overall communication lossless adaptive switching is completed. The multifunctional multiplexer meets the mixed transmission and adaptive transmission requirements of SIP-based voices and Ethernetservices in the scatter channel, has the advantages of being easy to set and high in integration level and achieving multiple transmission speeds and has a broad application prospect in the scatter communication system.

The invention provides an electrode capable of carrying out on-line simultaneous detection on an object to be detected containing multiple components. The electrode can be combined with a constant potential rectifier, a multiplexer and data processing software for carrying out on-line detection on the object to be detected by using the specificity of different DNA sequences to different targets, and a sensing device developed combining the array intuitionism and DNA specificity is not reported. For the object to be detected containing multiple components, the electrode can realize on-line simultaneous detection, and has the advantages of strong maneuverability and simple structure.