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186 results about "Military standards" patented technology

HoloLens-based battlefield situation construction and interaction implementation method

The invention discloses a HoloLens-based battlefield situation construction and interaction implementation method. The method sequentially comprises the following steps of 1, firstly, sequentially constructing a terrain model, a three-dimensional object model and a three-dimensional military standard, and then adopting the mode of combining geometric characteristic optimization and grain optimization for performing model optimization; 2, sequentially achieving the purposes of battlefield situation dynamic showing fluency and authenticity and the purpose of three-dimensional virtual-real fusion; 3, performing user interaction. The method can achieve construction and interaction according to user identity roles, operation habits, interaction action tendencies and other natural human-machine interaction holographic battlefield situation electronic sand table information, the situation awareness fidelity and immersion can be enhanced, the method can intelligently and efficiently provide the imaginable and visual battlefield situation and visualized information interaction interface for commanders and the staff, and the method is used for supporting construction of intelligent information service systems of future advanced command posts with different fight persons and different operation patterns.
Owner:THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP

A preparation technique for spacecraft-used molybdenum/platinum/silver/ layered metal matrix composite materials

The invention relates to a preparation technique for spacecraft-solar-cell-array-interconnection-sheet-used molybdenum/platinum/silver/ layered metal matrix composite materials. The technique comprises the steps of pretreatment of Molybdenum metal foils, platinum plating of molybdenum metal surfaces, molybdenum/platinum electroplating sample annealing, silver electroplating of molybdenum/platinum layered annealing sample surfaces, annealing of molybdenum/platinum/silver electroplating samples, scanning electron microscope observation of molybdenum/platinum/silver layered metal matrix composite material surface morphologies, Auger spectroscopy analysis along the depth and resistor spot welding tensile strength testing. According to the invention, diffusion infiltrating happens in a molybdenum/platinum interface and a platinum/silver interface, so that metallurgical bonding is realized in the molybdenum/platinum interface and the platinum/silver interface, and relatively high interface bonding intensity is realized. The molybdenum/platinum/silver/ layered metal matrix composite materials with the high interface bonding intensity and high welding tensile strength are obtained. The welding tensile strength of the molybdenum/platinum/silver/ layered metal matrix composite materials when in spot welding with a solar cell single spot resistor is 324gf, and a welding strength index prescribed by China military standard GJB2602-1996 is exceeded.
Owner:TIANJIN UNIV

Optimization method for electromagnetic compatibility fault repair by adopting electromagnetic compatibility test over-standard strategy

InactiveCN103048569AEasy to analyzeComprehensive analysis of emission characteristicsElectrical testingEngineeringRadiated emission
The invention discloses an optimization method for electromagnetic compatibility fault repair by adopting electromagnetic compatibility test over-standard strategies. In the method, a conducted emission curve, a conducted susceptibility curve, a radiated emission curve and a radiated susceptibility curve are used and are respectively compared with requirements of national military standards to obtain over-standard areas; according to electromagnetic vulnerability weights of different frequency ranges, an area weighted integration method is adopted to quantify the over-standard areas to obtain respective weights; and finally the respective weights are introduced to obtain electromagnetic compatibility weight expected values of helicopter-borne equipment. By virtue of index quantification and weight allocation, the electromagnetic compatibility interference faults of the helicopter-borne equipment are associated with the electromagnetic compatibility of the entire helicopter, factors such as electromagnetic compatibility conducted emission, conducted susceptibility, radiated emission, radiated susceptibility and electromagnetic compatibility classification of all helicopter-borne equipment are comprehensively considered, the index quantification and the corresponding weight allocation are conducted to obtain degrees of influence of the electromagnetic compatibility interference faults of the helicopter-borne equipment on the electromagnetic compatibility of the entire helicopter are obtained, the priorities of the repair sequences of the electromagnetic compatibility interference faults of the helicopter-borne equipment are determined and a basis is provided for determining sequences for electromagnetic compatibility rectification.
Owner:BEIHANG UNIV

Mutual non-solid-solution system metal infiltration process and device based ion implantation radiation damage

The invention relates to a mutual non-solid-solution system metal infiltration process and device based ion implantation radiation damage. The process comprises the following steps of polishing and ultrasonic cleaning of pure tungsten metal, vacuum drying, silver metal plasma implantation, tungsten metal surface vacuum evaporation silver coating, vacuum drying, argon protection silver infiltration, hot-pressing infiltration supplementation, section scanning electron microscope (SEM) observation of a tungsten/silver composite metal material, section line scanning component analysis, Auger energy spectrum analysis of components along the material depth, welding strength test when the tungsten/silver composite metal material is used for spot-welding electrodes, and SEM observation of welding head tensile fractures. In the invention, a metal plasma implantation technology is utilized to combine with the vacuum evaporation technology, the high-temperature silver infiltration technology and the hot-pressing infiltration supplementation technology, thus silver metal is successfully infiltrated to the surface of a metal tungsten workpiece to prepare the tungsten/silver composite metal material. Test results show that when a tungsten/silver composite metal material electrode is utilized to carry out resistance spot welding on a silver metal interconnection sheet and an aerospace craft solar cell sheet, the single-spot welding strength is up to 450gf which excesses Chinese military standard and current enterprise standard, and the welding head tensile fractures is determined to be ductile fractures through SEM analysis.
Owner:TIANJIN UNIV

Method for testing accurate multifrequency and synchronous synergetic conduction sensitivity at high speed

The invention discloses a method for testing accurate multifrequency and synchronous synergetic conduction sensitivity at high speed, which comprises the steps: firstly, a testing frequency from 10 kHz to 18 GHz is dispersed according to a frequency step length which conforms to a GJB sensitivity testing requirement to ensure a testing frequency point; the whole testing frequency is grouped from low to high beginning from a starting frequency, and each group has N frequency points; then, an arbitrary waveform generator is controlled to output N frequencies once and switch the frequencies according to group steps; the frequency groups are scanned, if a tested device is sensitive, the frequency group is scanned point to point to determine the sensitive frequency point, and the sensitivity threshold level of the frequency point is determined according to a military standard single-point testing method; the frequencies are switched according to a group stepping mode, each group of frequencies integrally step according to the N delta f step length equivalently, and the next group of multifrequency signals is output until a whole frequency band is scanned completely. The method can synchronously test a plurality of frequently points by scanning once, automatically realize the step scan according to the groups, greatly increase the testing efficiency of the sensitivity test and can quickly diagnose the failures of the sensitive points.
Owner:BEIHANG UNIV

Optimization method for conducted interference fault correcting by using conduction test standard-exceeding strategy

ActiveCN102749536AEasy to analyzeSolve problems that cannot be quantitatively analyzedElectrical testingEngineeringConducted Interference
The invention discloses an optimization method for conducted interference fault correcting by using a conduction test standard-exceeding strategy. A conducted emission curve and a conducted susceptibility curve are used for being compared with national military standard requirements, and a standard-exceeding area is obtained; area integral is adopted for quantizing the standard-exceeding area to obtain conducted emission index weight and conducted susceptibility index weight; and finally airborne device electromagnetic compatibility classification weight, the conducted emission index weight and the conducted susceptibility index weight are combined to obtain airborne device electromagnetic compatibility classification weight expectation. The optimization method combines airborne device electromagnetic compatibility conducted interference fault and electromagnetic compatibility of a whole plane by means of index quantization and weight distribution, gives overall consideration to factors such as all airborne device electromagnetic compatibility conducted emission, conducted susceptibility and electromagnetic compatibility classification, conducts index quantization and corresponding weight distribution, obtains affecting degree of airborne device conducted interference fault on the electromagnetic compatibility of the whole plane, determines priority of an airborne device electromagnetic compatibility conducted interference fault correcting sequence, and provides proof for determining a sequence of electromagnetic compatibility rectification.
Owner:BEIHANG UNIV

Super-huge type multi-layer full-automatic sliding swing rainfall test device

The invention discloses a super-huge type multi-layer full-automatic sliding swing rainfall test device, which comprises a PLC (programmable logic controller) full-automatic control system, a base, a main column, a plurality of lateral branch pipes distributed along the main column at vertical intervals and a sliding swing mechanism. The main column is a main water supply pipe, each branch pipe is connected with the main column through a rocker arm in a swinging mode is and provided with a plurality of catapulting drop type spray nozzles which can spray discontinuous water drops with diameter of 0.5 to 4.5 mm; a driving device of the sliding swing mechanism drives a upper push-pull rod and a lower push-pull rod to ascend and descend, the upper push-pull rod and the lower push-pull rod drives each branch pipe to make horizontal arc swing in a range of 30 degrees upwards to 45 degrees downwards under the traction of the rocker arms through push-pull connecting rods, so that a vertical component and a horizontal component of the rainfall reach the technical requirements of the military standard and the national standard. The super-huge type multi-layer full-automatic sliding swing rainfall test device is particularly suitable for rainfall tests of large-scale devices, high-voltage devices, military devices, sky weapons and the like.
Owner:东莞市丰远电器有限公司 +1

Movable pump pressure type atomized fuel water distribution device and water distribution method

The invention relates to a movable pump pressure type atomized fuel water distribution device and a water distribution method. The movable pump pressure type atomized fuel water distribution device comprises four subsystems including a saturated fuel water distribution subsystem, an oil and water separation subsystem, a super-saturated water distribution subsystem and a control subsystem accordingto functions. The saturated fuel water distribution subsystem comprises a quick-release connector a (1), a quick-release connector b (11), a moisture tester a (2), a water tank a (3), a water injection pump a (4), an atomization spray nozzle a (5), a control valve a (6), a flow sensor a (7), a pressure sensor a (8), a temperature sensor a (9) and a static mixer a (10). The water distribution method for distributing water by the aid of the movable pump pressure type atomized fuel water distribution device mainly includes two steps of preparing saturated fuel; preparing super-saturated fuel. The movable pump pressure type atomized fuel water distribution device and the water distribution method have the advantages that the movable pump pressure type atomized fuel water distribution device can be quickly connected with test heat preservation fueling trucks and test storage fueling trucks by the quick-release connectors, can be automatically controlled and is easy to operate; the movablepump pressure type atomized fuel water distribution device and the water distribution method are accurate in water distribution proportion owing to the water injection micro-pump and a water flow control system, and accordingly index requirements of national and military standards can be met.
Owner:CHINESE FLIGHT TEST ESTAB
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