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Hohai University patents


Recent patent applications related to Hohai University. Hohai University is listed as an Agent/Assignee. Note: Hohai University may have other listings under different names/spellings. We're not affiliated with Hohai University, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "H" | Hohai University-related inventors


Preparation and application of silver-modified spiral titanium dioxide nano-fiber photocatalyst

The present invention discloses a preparation method of a silver-modified spiral titanium dioxide (tio2) nano-fiber photocatalyst, comprising the following steps: preparing a spiral tio2 nano-fiber; preparing a nano-silver aqueous solution; and preparing a silver-modified spiral tio2 nano-fiber photocatalyst. The photocatalyst is coupled with the spiral structure of the nano-fiber and nano-silver particles with a specific size, improving the photocatalytic activity of the photocatalyst. ... Hohai University

Distributed optical fiber identification system and method for seepage conditions of hydraulic structure and base thereof

A distributed optical fiber identification system and method for seepage conditions of a hydraulic structure and a base thereof including a single-mode optical fiber having an automatic control heat source produced for seepage measurement, an optical path coupler and a synchronous controller, the synchronous controller is connected to a mode locked laser, a polarization beam splitter, an isolator, a grating pair, a diffraction grating, a reflector, a beam splitter, a nonlinear crystal, a spectrometer and a michelson interferometer, the output end of the michelson interferometer is connected to the optical path coupler, the output end of the optical path coupler is connected to a detector and a second optical splitter respectively, the detector is connected to a digital signal processor, the second optical splitter is connected to the digital signal processor through an amplifying circuit, and the digital signal processor is connected to the synchronous controller and a collector respectively.. . ... Hohai University

Single-mode optical fiber having automatic control heat source specifically produced for hydraulic seepage measurement

A single-mode optical fiber having an automatic control heat source specifically produced for hydraulic seepage measurement, sequentially includes a single-core optical fiber, an inner protective elastic layer, a heat insulation steel ring, an inner-layer filling protection ring, an elastic hard ring, and an anti-seepage heat insulation hard sleeve ring arranged from inside to outside. The single-core optical is connected to a plurality of outer circular sheathing protection pipes respectively, the outer circular sheathing protection pipes sequentially pass through the inner protective elastic layer, the heat insulation steel ring, the inner-layer filling protection ring and the elastic hard ring and are connected to the anti-seepage heat insulation hard sleeve ring, each outer circular sheathing protection pipe is filled with a drainage water storage cotton sleeve, the drainage water storage cotton sleeve is connected to a second filter screen, and the second filter screen is connected to a first filter screen externally.. ... Hohai University

Hydraulic structure seepage property distributed optical fiber sensing integrated system and method

A hydraulic structure seepage property distributed optical fiber sensing integrated system includes a special optical fiber for seepage measurement, an optical fiber calibration device, an optical fiber laying device, and a seepage property identification device. After the optical fiber calibration device calibrates the special optical fiber for seepage measurement on site, the special optical fiber for seepage measurement is laid and tested with the aid of the optical fiber laying device, and is connected to the seepage property identification device for information collection, processing and analysis after the test is successful.. ... Hohai University

Heat transfer pipe embedded in a prefabricated pipe pile and embedding method

A heat transfer pipe embedded in a prefabricated pipe pile including a plurality of prefabricated pipe piles, a heat transfer pipe component and a pump assembly; the prefabricated pipe pile sealed by closing the bottom thereof and sides of which are provided with inclined holes; a locking pin provided at an inner wall of the pipe pile; a steel plate provided on the locking pin, and a steel bar structure bound on the steel plate; the heat transfer pipe component comprises a horizontal heat transfer pipe communicated with a vertical heat transfer pipe with both pipes communicated with the pump assembly, the horizontal pipe embedded and fixed via the steel bar structure, the vertical heat transfer pipe passes through the inclined holes and fixed in the pipe pile via a steel bar bracket.. . ... Hohai University

Preparation method of sulfonated two-dimensional titanium carbide nanosheet

The present invention discloses a preparation method of a sulfonated two-dimensional titanium carbide nanosheet, which comprises the following steps of preparing two-dimensional titanium carbide by using aluminum atomic layers in hydrofluoric acid chemical stripping layer-shaped titanium aluminum carbide; preparing sulfanilic acid diazosalt; conducting a sulfonation reaction between the two-dimensional titanium carbide and the sulfanilic acid diazosalt to prepare the sulfonated two-dimensional titanium carbide nanosheet. The sulfonated two-dimensional titanium carbide nano material prepared through the present invention has good dispersity in water and common organic solvents, and a single-layer or few-layer sulfonated two-dimensional titanium carbide nanosheet with large size and high quality can be obtained after ultrasonic treatment is performed on a dispersion liquid. ... Hohai University

Water structure health sensing distributed optical fiber calibration system and method

A wading structure health sensing distributed optical fiber calibration system and a method includes a heat insulation barrel, and calibration modules located in the inner ring of the barrel, the calibration module comprises a through-shaft, a first electronic thermometer and a second electronic thermometer, an optical cable to be calibrated is twisted on the through-shaft and is connected to an optical fiber temperature demodulator outside the heat insulation barrel, the first and second electronic thermometers are respectively connected to first and second temperature control meters outside the barrel, a temperature source wire for heating water in the barrel arranged in the wall of the barrel, the temperature source wire connected to a power temperature control meter outside the barrel, and the first temperature control meter connected to cooling and heating devices simultaneously through leads of the first temperature control meter.. . ... Hohai University

Preparation method of alumina-carbon nano tube composite powder material

A preparation method of an alumina-carbon nano tube composite powder material includes the steps of using an organometallic precursor as a raw material, using metal nanoparticles formed on the surface of the alumina powder as a catalyst, and simultaneously feeding a carbonaceous gas such as methane and acetylene, so as to grow a carbon nano tube in situ, and obtain an alumina-metal nanoparticle-carbon nano tube composite powder material through a chemical vapor deposition method under a temperature condition of 400 to 800° c. Through changing various parameters such as the weight of the organic raw material, the flow or constituent of reactant gases and reaction temperature, the decomposition of the organic raw material and the generation of the metal nanoparticles and the carbon nano tube are adjusted, and the size and the microstructure of the powder are controlled.. ... Hohai University

Preparation method of alumina supported cerium oxide powder material

The present invention discloses a preparation method of an alumina supported cerium oxide powder material. A cerium organometallic precursor is effectively decomposed into ceo2 nanoparticles at 500-700° c. ... Hohai University

Test system and test method for detecting cement content of cement mixing pile body in real time

The present invention discloses a test system and a test method for detecting the cement content of cement stirring pile body in real time at a construction site. The test system specifically includes a cement slurry density measuring apparatus and a cement admixing amount calculating apparatus. ... Hohai University

Municipal solid waste landfill barrier system capable of prolonging breakthrough time of leachate and manufacturing method thereof

The invention relates to a msw landfill barrier system capable of prolonging breakthrough time of leachate and a manufacturing method thereof. The system comprises a leachate collection and removal layer, a first hdpe (high-density polyethylene) geomembrane infiltration proof layer (2), a clay liner (5) and a groundwater collection and removal layer (6) which are sequentially stacked from top to bottom. ... Hohai University

Ship draught detection apparatus and its detection method

The present invention discloses a ship draught detection apparatus and its detection method. The ship draught detection apparatus includes two servo motors, a guide rail, a sonar detection device, a traction device, a locating device, and a control device. ... Hohai University

Damage detection apparatus for lock gate sill

The present invention discloses a damage detection apparatus for a lock gate sill, including a support, a water storage tank, a water inlet barrel, a filter device, a water pump, and a control device, wherein a barrier is vertically disposed at the bottom of the water storage tank, multiple water discharge pipes are vertically disposed in the barrier, upper ends of the water discharge pipes are communicated with the water storage tank, the water discharge pipes have different heights, lower ports of the water discharge pipes together compose a truncated conical cavity, a camera is disposed at the bottom of the water storage tank in a sealed manner, and a lens of the camera is located in an upper part of the truncated conical cavity. When it is desired to perform damage detection for the lock gate sill, muddy water is filtered by the filter device into clear water, and the clear water is pressurized by the water pump and then discharged from the water discharge pipes, such that the muddy water in the barrier is continuously diluted by clear water, the camera is in a shooting environment of clear water, and the lock gate sill is shot for detection at this time, whereby it is ensured that the taken picture has good definition, and thus the position of abrasion and the amount of abrasion of the lock gate sill can be clearly determined.. ... Hohai University

Electromagnetic multiaxial fatigue testing machine

An electromagnetic multiaxial fatigue testing machine includes a test piece fixing platform and an electromagnet loading mechanism arranged on a frame, wherein the electromagnet loading mechanism includes a first loading device for bend loading, and a second loading device for axial and torsional loading. The first loading device includes a first permanent magnet and a first electromagnet with a direction of a magnetic force generated therebetween is orthogonal to an axial direction of a test piece; the second loading device includes a second permanent magnet and a second electromagnet mounted on a swinging pair with a direction of a magnetic force generated therebetween is parallel to the axial direction of the test piece.. ... Hohai University

12/14/17 / #20170356144

Assembled type pier column member with steel-concrete composite structure

A segment-assembled type pier column member with a steel-concrete composite structure includes a reinforcement tube embedded in a pile cap, wherein the reinforcement tube is connected with a bottom of a lower segment of a hollow steel tube pier and is poured with concrete, and pier columns in upper and lower segments are reinforced by means of segment connecting and being embedded with local reinforcing meshes. A steel cross beam is connected with an upper segment of the hollow steel tube pier in an assembled way. ... Hohai University

08/03/17 / #20170217840

Method for coating metal nanoparticles on oxide ceramic powder surface

The present invention discloses a method for uniformly coating metal nanoparticles without a carbon impurity on an oxide ceramic powder surface, which includes the steps of putting grinded and mixed a metal organic material and oxide ceramic powder into a rotational reaction chamber, then bubbling oxidizing gas under a rotational and heating condition to oxidize the metal organic material into a metal oxide, and finally bubbling reducing gas to reduce the metal oxide into nanoparticles in a metallic state, so as to implement the uniform coating of the nanoparticles in the metallic state, and avoid coarsening and growing problems of nanoparticles led by a long-term coating reaction under a high temperature. The present invention has a simple method and a short preparation period, and the metal nanoparticles prepared are uniformly dispersed and have wide application prospects in multiple fields like catalytic materials and conductive ceramics.. ... Hohai University

07/27/17 / #20170212894

Traffic data stream aggregate query method and system

A traffic data stream aggregate query method and system includes the steps of acquiring spatial-temporal information of a mobile object to generate a traffic data stream, dividing data space into cells, grouping adjacent cells with similar frequency into few buckets, calculating kalman gains of the buckets based on frequencies of the buckets, and indexing the buckets using a binary partition tree to form a bpt index of the current timestamp, and serializing the bpt after the end of the current timestamp to form a historical index; and performing aggregate query, wherein an optimum estimation value of the bucket frequency is utilized to replace for calculating when the frequency of the bucket changes a lot. The system includes: an information collection module, a data processing module, an index processing module, an application service module and an index storage module.. ... Hohai University

05/04/17 / #20170121230

Tungsten carbide-cubic boron nitride composite material and preparation method thereof

A tungsten carbide-cubic boron nitride composite material and preparation method thereof mainly includes wc and cbn, wherein the wc powder is coated with co nano-layer and the cbn powder is coated with sio2 nano-layer, and hardness and toughness of the composition material can be improved by coating. The method for preparing a tungsten carbide-cubic boron nitride composite material adopts chemical vapor deposition method and high temperature sintering method. ... Hohai University

05/04/17 / #20170121194

Device for purifying cropland effluents

A device for purifying first-stage drainage effluents from dry croplands, the device including: a) a plastic corrugated pipe including an upright segment and a horizontal segment, the upright segment comprising plastic mesh openings; b) a steel wire mesh box filled with stuffing pellets including biological carriers; and an inspection cover. The plastic mesh openings are disposed at one end of the upright segment, the other end of the upright segment is connected to one end of the horizontal segment, and the other end of the horizontal segment is connected to the steel wire mesh box. ... Hohai University

03/16/17 / #20170073279

Facility secondary no3- salinized soil modifier, preparation method and modification method

A facility secondary no3− salinized soil modifier and a modification method are disclosed. The present invention involves the preparation processes of two biological soil modifiers a and b and application methods thereof, which are specifically described as follows: (1) soil modifier a.: solid, obtained by microbial fermentation with straw powder and rice bran and the like as raw materials. ... Hohai University








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