348results about How to "Eliminate mutual interference" patented technology

The invention is directed to a method of synchronising transmission between two nodes in a wireless network. The method comprises the steps of obtaining an expected interference profile for each node; and agreeing a synchronised transmission schedule between the nodes, where the expected interference profile of the or each node meets predetermined criteria.

A hooked dust scraper for ball screw unit includes a plurality of tooth portions and corresponding number of hook portions. It is characterized that the scraper is hooked on the nut of the ball screw unit without employing screw engagement so that the ball screw unit associated with this scraper is easy to fabricate, assemble, and detach thereby saving the production and assembly cost.

The invention provides a face-to-face photographing type coin inspection machine and a coin inspection method. The face-to-face photographing type coin inspection machine is used for inspecting the quality and a coincided imprint of a coin stamping image and comprises a conveyor belt, a slope slide way and a face-to-face photographing structure, wherein the slope slide way is connected to the outlet end of the conveyor belt; a coin is transmitted from the conveyor belt and then enters the slope slide way to take inertia and free-fall motion; the slope slide way is provided with a transparent structure which enables the front and back images of the coin to be both showed; and the face-to-face photographing structure is the front and back image structure of the coin capable of moving to the slope slide way in a simultaneous face-to-face photographing way. The invention simultaneously inspects the quality of the front and the back of the coin on the slope slide way without setting a complex mechanical structure for overturning the coin in the coin inspection machine, thereby reducing the volume, lowering the requirements for the space of a workshop and achieving the purpose of simplifying and reducing the coin inspection machine.

The invention relates to a multi-dimensional ion chromatographic analysis system, belonging to the chemical field of analysis. To solve the problem that a conventional chromatographic technique is insufficient in separation of molecules such as various organic acid, amino acid, sugar and alcohol in complex samples, a set of multi-dimensional ion chromatographic analysis system is developed; the system comprises a plurality of pumps, one or more changeover valves and a plurality of detectors; by utilizing the difference of separation mechanisms of target components on chromatographic columns and the difference of retention time of the components, and through a plurality of chromatographic switchover enrichments and valve switchover time selection, ion chromatographic connected systems of two-dimension, three-dimension, four-dimension, five-dimension and higher can be established according to difference of target components to be separated, so that the coseparation analysis of water-soluble metabolite such as organic acid, amino acid, sugar and alcohol of complex samples is realized. By utilizing the multi-dimensional ion chromatographic analysis system, the complex sample can be rapidly, sufficiently and precisely separated and identified, and the mutual interference among the components is eliminated.

The method comprises: using the least squared method to get the training pilot symbol location channel response HPji relating to the system receiving antenna; after interpolation, getting the channel response value Hji of all subcarrier location between the antenna pairs, and making the inverse Fourier transform for all response channel value Hji to get the impulse response of multipath hji; selecting the important path to get channel impulse response hji'; making Fourier transform for hji to the channel response Hji'; traversing all receiving antenna pairs to the channel response estimation initial value of the current channel between all receiving antenna pairs; using the reference pilot symbol of data frame to estimate the offsetPhiji of channel phase; using thePhiji to compensate the Hji' to get the final channel response estimation H of the multi-input multi-output (MIMO) OFDM system.

The invention relates to a method and a system for receiving digital broadcasting signals in frequency modulation (FM) broadcast bands. The method comprises the following steps of: receiving digital/analog (D/A) mixed signals x (t); preliminarily separating to acquire preliminarily recovered analog FM signals x0FM (t) and digital FM signals d0 (t); performing first level pilot frequency-based iterative separation on the signals to acquire digital and analog FM signals after the first level iterative separation; and performing second level iterative separation by means of pilot frequency and internal codes, wherein the digital FM signals after the iterative separation acquire digital audio signals and data signals through channel decoding, and the analog FM signals acquire analog audio signals through demodulation and D/A conversion. A digital FM signal demodulation decoder of the system comprises a preliminary FM separator, an iterative FM separator, and a synchronization recovery and channel equalizer and a decoding module, and the iterative offset separation of the analog master FM from digital signals is realized. According to the method and the system, the mixed D/A signals overlapped by the same channel are separated, the mutual interference of the signals is eliminated, and the FM band digital broadcasting system can be realized.

The invention provides an ultra-deep sea bed sediment ropeless gravity sampling system, mainly comprising a recycling unit and a discarding unit; the recycling unit comprises a beacon, a floating component, a rope and a sampler inner tube; the beacon is positioned at the top end of the floating component; the floating component, the rope and the sampler inner tube are connected with each other in sequence; the discarding unit comprises a sampler outer tube, a counterweight and a trigger unlocking mechanism; the counterweight peripherally arranged at the upper portion of the outer wall of the sampler outer tube; the trigger unlocking mechanism sleeves the outer wall of the sampler outer tube below the counterweight. The ultra-deep sea bed sediment ropeless gravity sampling system has higher reliability and safety and has lower cost than existing rope sampling methods.

The invention relates to a processing method of zinc smelting byproducts. The method comprises the following steps: firstly, using a mixed aqueous solution of ammonia and ammonia sulfate (or salvolatile) to leach copper-cadmium slag or cadmium-rich soot after heat treatment at a room temperature; then, decoppering a leaching solution by an organic solvent extraction method; directly producing metal cadmium from a solution containing zinc and cadmium by a low current density electrolytic method instead of a technological method of adopting zinc powder replacement to obtain sponge cadmium; using a sulphuric acid solution as strip liquor to strip copper from a decoppered organic extraction agent and then electrolyzing the copper-contained strip liquor to prepare the metal copper; in addition, electrolyzing the decoppered leaching solution which only contains zinc and cadmium to extract the cadmium; eliminating the mutual interference of copper ions and cadmium ions in the electrolytic process of the cadmium; and returning the electrolyzed leaching solution to the zinc production process. The method simplifies the processing technological process, shortens the product period, can respectively obtain a purer copper product and a purer cadmium product and decreases the zinc smelting byproducts and the processing cost.

The integrated dynamic displacement measurement device for magnetic suspension rotor comprises a measurement circuit, which includes: an input port connected with an output port of sine-wave generator, a drive module with output port connected at least four or more radial displacement sensors and one axial sensor. Besides, it also includes a full-bridge rectification filter module, a signal modulation module, a sampling holder, a multiplex switch, an A/D converter, and a CPU. This invention has well performance with low cost.

The invention relates to a knife edge polishing and grinding device provided with an arc-shaped scalpel. The knife edge polishing and grinding device comprises a base, a polishing and grinding fixture and a polishing and grinding head mechanism; the polishing and grinding fixture comprises a knife clamping base and a rail base plate, an arc-shaped rail and a matching body are arranged between the knife clamping base and the rail base plate, and a swing mechanism is formed by the knife clamping base and the rail base plate by matching of the arc-shaped rail and the matching body; when external force is acted on the knife clamping base, the knife clamping base swings on the rail base plate along the arc-shaped rail. A prismatic pair is arranged between the polishing and grinding fixture and the base or between the polishing and grinding head mechanism and the base, so that relative motion is generated between the polishing and grinding fixture and the polishing and grinding head mechanism; the polishing and grinding head mechanism comprises a first polishing and grinding wheel and a second polishing and grinding wheel, and the first polishing and grinding wheel and the second polishing and grinding wheel are arranged in a staggered mode in the direction of the relative motion of the polishing and grinding fixture and the polishing and grinding head mechanism. According to the knife edge polishing and grinding device, the structure is simple, the conception is ingenious, the cost is low, and the work efficiency is high. By means of the simple structure, effective space avoidance is achieved, therefore double-faced polishing and grinding can be carried out on a scalpel blade, and the processing efficiency of the knife edge polishing and grinding device is improved in multiples.

The invention discloses a method for testing dual-wavelength of light splitting luminosity. The method comprises the following steps of: preparing liquid to be tested and corresponding standard solution; selecting a corresponding largest absorbance as the testing wavelength; making a standard curve and a working curve of an object to be tested and an interference object; and calculating the content of the object to be tested according to an object (to be tested) content absorbance working curve regression equation that m is equal to KdeltaA+b. The method is strong in anti-interference capability, mutual interference of two components is eliminated, and the testing result is accurate; an absorbance calculation equation adopted is as follows: delta=A1-s2A2-t2; as the absorbance generated by the interference object is A1-s2A2-t2=0, the interference is eliminated, and the testing result is accurate; the method is simple and convenient, complex separation does not need to be carried out on two components which develop the color at the same time, so that the time, the labor and the agent are saved; two substances can be tested at the same time, and particularly the method has remarkable advantages for two components which are hard to be separated or cannot be separated; the method is applicable to more substances, and the method can be adopted only if the calculated deltaA is large enough, so that more substances can be tested with the attendance of a single interference object by using double wavelength.

The invention provides a separation method and receiving device of a digital broadcasting analog-to-digital (A/D) signal at a frequency modulation (FM) broadcast band. The separation method comprises the following steps: adding two neighboring vector signals in in-band-on-channel (IBOC) A/D mixed signals S, eliminating component of a digital signal dm to obtain x<2m>+x<2m>+1, and then obtaining amplitude and phase, wherein, the nth component of x<2m> and x<2m>+1 can be those of phase modulation signals ej alpha and ej beta; solving parameters theta and delta to obtain x<2m> and x<2m>+1; and restoring the digital signal dm. In the method, the designed antenna of the receiving device is sequentially connected with a tuning module, an A/D converter, a digital down converter (DDC) and a re-sampling module; output of the re-sampling module is switched in an A/D signal separation module with a concrete calculation program to obtain corresponding analog FM signals and digital signals; the signals are respectively accessed to a digital signal demodulator/decoder of an analog FM receiver; and finally an analog sound signal, a digital audio signal and a data signal which are sent from a sending end are obtained finally. The separation method has the advantages of good A/D signal separation effect, capability of eliminating mutual interferences and reliable performance and is easy to achieve.

The invention discloses a dual-mode bi-pass filter based on capacitance loading square resonant rings, mainly solving the problems of poor out of band rejection and uncontrollable coupling between cavities of traditional bi-pass filters. The filter comprises a micro-strip dielectric substrate (11), a metal earth plate (12), two same capacitance loading square resonant rings (13), a perturbation metal sheet (16) and a pair of input/output feeder lines (17). A symmetrical cascade mode is adopted between the capacitance loading square resonant rings (13), each capacitance loading square resonant ring comprises one square metal ring (14) and four loading metal sheets, and a pair of input/output feeder lines (17) adopt a symmetrical distribution mode, are arranged mutually parallel above the micro-strip dielectric substrate (11), and penetrate into the insides of the square resonant rings (13) for feeding. The dual-mode bi-pass filter based on capacitance loading square resonant rings can improve the out of band transmission characteristic, control the strength of coupling between cavities, realize highly symmetrical bi-pass frequency response, and be used in a wireless communication system.

The present application discloses a method and a device of resource allocation in Physical Downlink Control Channels (PDCCHs). The present application successfully improves the reliability of the transmission in PDCCH.

The invention discloses a device and a method for single plate peripheral power supply management. The method comprises the following steps that: a network management server transmits configuration information of the single plate power supply management to a core processing module; and the core processing module controls an execution module to energize or de-energize a peripheral and the time sequence for energizing the peripheral according to the configuration information of the single plate power supply management received from the network management server. The device and the method need no fussy debugging works in the process of production debugging, can solve the problems of the differences on energizing management between devices and redundant device interference, and can effectively save energy and reduce consumption.

The invention discloses a circular island for short-distance transfer, comprising a main lane (1) and a circular lane (2). The circular lane (2) comprises a right-turn lane (21) and a sidewalk (22), and the circular lane (2) is provided with bus stations (3). By partially modifying the circular island and optimally arranging bus stations, the transfer pace among main transfer lines and the transfer time of passengers can be greatly shortened.

The invention belongs to the technical field of galvanic corrosion measurement for metal materials, in particular relates to a multi-channel galvanic corrosion measurement device. According to the multi-channel galvanic corrosion measurement device, an SOC (System on a Chip) processor structural design is adopted; the front end of an electrode connection cable is connected with an electrode; the rear end of the electrode connection cable is connected into a voltage/current measurement switching unit; two ends of a front end signal conditioning circuit are bridged with a reference source afterbeing electrically communicated with an A/D (Analog-to-Digital) conversion circuit; the front end of the front end signal conditioning circuit is electrically connected with the voltage/current measurement switching unit; the output end of the A/D conversion circuit is electrically communicated with a main control module after being connected in series with a multi-channel electric isolation unit; an SOC processor is arranged in the main control module; the main control module is electrically connected with a display module, a storage module and a communication module respectively, so that electric information control is realized; and a signal input by a reference electrode is incorporated into the front end signal conditioning circuit after being amplified, so that a signal processing system is formed. The multi-channel galvanic corrosion measurement device has the characteristics of simple overall structure, reliable principle, convenience for use and operation, accuracy in measurement data, flexibility for control and wide application range.

The invention is used in the interference suppression in co-frequency and adjacent frequency between radio communication systems. In the invention, two systems co-existed all makes signal regeneration; the regenerated signals is sent to a regenerated signal process filter in another system through a wired media; according to requirement of its own system, the filter makes relevant filter process for the regenerated interference signals; the processed signals are re-inputted into the interference eliminator to eliminate the interference signals existed in its own system.