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252results about How to "Seamless connection" patented technology

Non die-casting type digitalization fast manufacturing method

The invention discloses a casting manufacturing method for general sand casting, which pertains to a digital-driven rapid manufacturing casting technology. The steps of the process are: the establishment of a model, the establishment of a casting system, the simulation of the casting process, the evaluation and the optimization; a molding sand with a certain proportion is mixed for preparation according to the requirements of the performance of a cast, thus preparing a sand billet; a procedure code is compiled according to the shape of a processing cavity, and the procedure code is input to a sand numerical control machine tool; the cast and a core are processed; the cast is cleared and detected; the core setting and the assembly of the cast are carried out; and the casting is carried out to form the cast. The casting manufacturing method adopts the casting and the cutting machining technologies for organic combination, which is a new cast production method. The numerical control cutting technology is adopted for processing the complicated large cast directly, which can not only eliminate the chain for manufacturing the mold, but can also improve the processing precision of the cast, reduce the thickness of the cast, improve the rigidity and reduce the weight; furthermore, the method has the green advantages of saving materials and reducing energy consumption.
Owner:ADVANCED MFG TECH CENT CHINA ACAD OF MASCH SCI & TECH

Online detection and control method and device of periphery of filtering rod

The invention relates to an online detection and control method of the periphery of a filtering rod and a device. The device is characterized by mainly comprising a parallel light source (1), a linear array CCD (Charge Coupled Device) detector (2), a scanning motor (3), a signal processing module (4) and an executing mechanism (6), wherein the parallel light source (1) and the linear array CCD detector (2) are respectively positioned at the two opposite sides of the filtering rod; the scanning motor (3) drives the parallel light sources (1) and the linear array CCD detector (2) to rotate around the filtering rod; the signal input end of the signal processing module (4) is connected with the signal output end of the linear array CCD detector (2); and the signal output end of the signal processing module (4) is connected with the control end of the parallel light source (1), the control signal input end of a motor driver of the scanning motor and the signal input end of the executing mechanism (6) simultaneously. The invention has the advantages that the accuracy is high (the size of the received image element is 10mum), no influence is caused by various interference factors such asvibration, noise, temperature, dust and barometric fluctuation and the like on a site, and the detection result is accurate, stable and reliable.
Owner:NANJING DASHU INTELLIGENT SCI & TECH CO LTD

Biphase digital phase-locking amplifier and digital domain synchronous phase-locking algorithm thereof

The invention relates to a biphase digital phase-locking amplifier (as shown in chart 1) and a digital domain synchronous phase-locking algorithm of the biphase digital phase-locking amplifier. The biphase digital phase-locking amplifier can be used for detecting weak current signals, and realize the functions of automatic filtering tracking and synchronous phase-locking. The biphase digital phase-locking amplifier can solve the problems that the volume of the existing phase-locking amplifier is large, the temperature excursion exists, and the speed is slow when the existing phase-locking amplifier is connected with a computer to carry out automatic measurement and control. The biphase digital phase-locking amplifier has the technical characteristics that the weak current signals pass through a 9-step RLC (radio link control) mixed type high-pass filter by a precise I/V conversion circuit, and is then connected with two low-noise instrument amplifiers, the connecting modes of which are different; the rear ends of the instrument amplifiers are respectively connected with an 8-step RLC mixed type high-pass filter, and a differential signal is formed by signals output by two low-pass filters. Meanwhile, reference signals pass through a 90-degree phase shifter of a phase-locking loop to output two TTL square waves, the phase difference of two phases of which is 90 degrees. Signals of three paths are collected by a data acquisition card, and are then transmitted to a PC (personal computer) machine. The biphase digital domain synchronous phase-locking algorithm (as shown in chart 2) provided by the invention is applied on the PC machine to carry out signal processing and filtering.
Owner:CAPITAL NORMAL UNIVERSITY

Intersection hardware-in-the-loop dynamic microscopic simulation system and its simulation method

InactiveCN102280027ASeamless connectionIntuitive physical demonstration of microscopic traffic flowControlling traffic signalsHardware modulesEngineering
The invention discloses an intersection semiphysical dynamic microcosmic simulation system which comprises an intersection microcosmic simulation module, a light emitting diode (LED) lamp hardware module, a traffic light hardware module, a signal timing control module and an intersection real object demonstration platform, wherein the signal timing control module sends a timing parameter to the intersection microcosmic simulation module and the traffic light hardware module and controls a traffic light of the intersection microcosmic simulation module according to feedback information of the traffic light hardware module; the intersection microcosmic simulation module simulates a situation of vehicles at an intersection and calculates an average delay of each vehicle at the intersection; the traffic light hardware module controls a traffic light and a count-down digital tube of the intersection real object demonstration platform according to the timing parameter; the LED hardware module controls states of LED lamps on the intersection real object demonstration platform according to state data of the LED lamps; and the intersection real object demonstration platform demonstrates a process that the vehicles pass through the intersection in the form of real objects. By the intersection semiphysical dynamic microcosmic simulation system, an intersection traffic light control system and a computer simulation technology are combined together, so that an aim of integrating simulation research and application practice is fulfilled.
Owner:CHANGAN UNIV

Parameter control-based multimode base band processing realizing method

The invention discloses a parameter control-based multimode base band processing realizing method which comprises the steps of: constructing a modularized and standardized hardware unit; 2, sampling in an intermediate frequency; 3, downloading an external parameter to increase a frame header and a frame footer, converting data into a frame and inputting to a coding module; 4, enabling the generated modulation signal to enter a switch handover unit, selecting a proper switch for connection; 5, digitizing the whole frequency band by using a broadband ADC (Analog To Digital Converter), completing the intermediate frequency processing by using software, filtering out a narrow band signal and conveying the narrow band signal to a base band; and 6, processing the base band. According to the parameter control-based multimode base band processing realizing method, the communication can be carried out under different protocols, different software modules can be realized by a DSP (Digital Signal Processor) through only calling different controllable parameters without calling the whole software module by adopting a parameter control-based software radio system, the base band processing module is completed, different filter module modulation and demodulation modes, message source coding and decoding and the like are realized, thus operand of the DSP is reduced.
Owner:GUANGDONG BAIYUN UNIV

Method for removing SO2 and NOX from flue gas of coal-fired boiler by virtue of phosphoric ore pulp and phosphorus sludge

The invention discloses a method for removing SO2 and NOX from flue gas of a coal-fired boiler by virtue of phosphoric ore pulp and phosphorus sludge. The method comprises the following steps of causing the flue gas of the coal-fired boiler to enter an oxidation tower containing oxidation liquid to fully contact with the oxidation liquid for reaction, a part of NO being oxidized into NO2, then causing the flue gas to enter an absorption tower, and absorbing nitrogen oxide and sulfide in the flue gas by virtue of the solubility of NO2 and SO2 in water and the catalytic oxidation of transition metal ions of the phosphoric ore pulp to make the nitrogen oxide, sulfur dioxide and dust content of the flue gas far lower than the national emission standard. According to the method, a raw material of a phosphate chemical enterprise is utilized, phosphate chemical and coal-fired boiler production is coupled, no raw materials are required to be added, sulfuric acid formed by SO2 is absorbed directly for decomposing phosphoric acid produced by phosphorus ores, and nitric acid formed by the nitrogen oxide enters a nitrogen and phosphorus compound fertilizer system; the method is high in resource utilization rate and less in investment, and has obvious social and economic benefits, all byproducts are recycled, and no secondary pollutants are produced.
Owner:KUNMING UNIV OF SCI & TECH +1

Dual polarization integration plane lens antenna

The invention discloses a dual polarization integration plane lens antenna. The antenna which is in a layered structure is sequentially provided with a plane lens, a secondary feed source and a dual polarization primary feed source; a metal antenna support is arranged on the exterior. According to the dual polarization integration plane lens antenna which is based on a plane substrate integration waveguide structure, a substrate integration waveguide cavity antenna serves as a dual polarization feed source to perform feed on the secondary feed source, the secondary feed source and the primary feed source form into an equivalent feed source to feed the plane lens commonly, phase compensation is obtained from the lens, spherical waves are converted to be plane waves, and accordingly the antenna with high gain, high efficiency and stable pointing direction is achieved. The antenna aiming at development requirements of plane integration and a minimized long-distance wireless communication system with high gain, allows dual polarization and is low in profile, easy to integrate with a millimeter wave circuit is achieved under the Q-LINKAN application background. The dual polarization integration plane lens antenna has the advantages of being simple in design, firm in structure, compact in size and being capable of being integrated with the plane circuit.
Owner:ZTE WAVETONE SCI & TECH +1

Fuming device of smoke wind tunnel

The invention relates to a fuming device, especially to a fuming device of a smoke wind tunnel. The fuming device is provided with a fuel tank breather pipe, a fuel tank, an oil delivery hose, a smoke oil controller, positive and negative clamps, power supply positive and negative wires, positive and negative binding posts, a wind tunnel test section hole body, a metal wire, an insulation connecting wire, a smoke oil collector and a direct-current high-voltage power supply. The oil tank is connected with the metal wire by the oil delivery hose; the fuel tank breather pipe is arranged at the top of the oil tank and is connected with the air; and the smoke oil controller is installed on the fuel tank breather pipe between the oil tank and the metal wire. The oil delivery hose and the metal wire are connected to the two ends of the positive binding post respectively; and the positive binding post is fixed at the opening part of the top of the wind tunnel test section hole body. The metal wire and the insulation connecting wire are connected to the two ends of the negative binding post and the negative binding post is fixed at the opening part of the bottom of the wind tunnel test section hole body. The power supply positive and negative wires are connected with the positive and negative clamps; and the positive and negative clamps are clamped at the naked part where the positive and negative binding posts and the metal wire are connected. And the bottom of the insulation connecting wire is connected with the smoke oil collector.
Owner:XIAMEN UNIV
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