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483results about How to "Easy to make cost" patented technology

Method for detecting various pesticide residues in tobacco by utilizing multiwalled carbon nanotube

The invention discloses a method for detecting various pesticide residues in tobacco by utilizing a multiwalled carbon nanotube. The method is characterized in that an organic solvent is used for extraction; the multiwalled carbon nanotube is used as a reverse solid phase dispersion adsorbent; the tobacco samples are purified through vortex and centrifugation; a high performance liquid chromatography-tandem mass spectrum coupled technology and a gas chromatography-tandem mass spectrum coupled technology are combined to realize the synchronous detection of various pesticide residues in the tobacco. According to the method, the multiwalled carbon nanotube is used as the reverse solid phase dispersion adsorbent, so that the purification effect, the influence on the adsorption of the target analyte due to the frequently-used polar adsorbents is eliminated while the matrix effects are reduced, and a cleaner solution is provided to decrease the maintenance of the instrument in the using process; the multiwalled carbon nanotube is low in preparation cost and less in dosage and has the effect of greatly reducing the experimental cost; the method provided by the invention has the advantages of being correct in measurement, high in sensitivity and good in repeatability, and has the effect of satisfying the requirement for rapidly analyzing and detecting the large batch samples.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC +1

Can printing machine numerical-control system based on digital motion controller

The invention relates to a can printing machine numerical-control system based on a digital motion controller, and the can printing machine numerical-control system comprises a human-machine communication touch screen operation control module based on a windows platform, a digital motion controller, a motion actuation module and a reducer module, wherein the human-machine communication touch screen operation control module based on the windows platform is connected with the digital motion controller through an Ethernet network cable, and the digital motion controller and an input / output (I / O) sub-board of the digital motion controller are directly connected with an I / O signal connection terminal of the motion actuation module, i.e. an alternative-current servo motor; the digital motion controller is connected with the motion actuation module i.e. the alternative-current servo motor through an Ethernet bus; and the digital motion controller is connected with four alternative-current servo motors to form a double-closed-loop motion control system. The system is simple in structure, each constitutional part is relatively independent, partial hardware can be directly purchased in the market to be used as the constitutional part, not only can the performance be comparable and the cost be reduced, but also simplicity in assembling, application and upgrading can be realized, and the tank printing machine numerical-control system can be mass popularized to a pop can printing production line and similar iron production lines.
Owner:FOSHAN DING ZHONG MACHINERY

Large-mode-area single-mode fiber connector and manufacture method

InactiveCN102520490AEasy to identifyGood beam expansion effectCoupling light guidesRefractive indexEngineering
The invention discloses a large-mode-area single-mode fiber connector and a manufacture method. The large-mode-area single-mode fiber connector comprises an insertion pin; a connecting and fixing head is arranged at the periphery of the insertion pin; a single-mode fiber is formed in the center hole of the insertion pin; the single-mode fiber is fused with a graded-refractive-index lens, wherein the graded-refractive-index lens is made by carrying out thermal diffusion on a step-type multimode fiber; and a color ring is formed on a rubber tail sleeve of the single-mode fiber. The manufacture method of the large-mode-area single-mode fiber connector comprises the following steps of: carrying out thermal diffusion on the step-type multimode fiber so as to achieve the element doping of a fiber core, and forming the graded-refractive-index lens with a refractive index reducing outwards along the radial direction; fusing the graded-refractive-index lens with the single-mode fiber, cutting the graded-refractive-index lens and fixedly connecting the graded-refractive-index lens into the center hole of the insertion pin, aligning the outer end of the graded-refractive-index lens with the end face of the insertion, grinding and polishing the end face of the insertion pin; and printing the color ring on the rubber tail sleeve, and configuring the connecting and fixing head for the insertion pin. The large-mode-area single-mode fiber connector and the manufacture method have the advantages that: the large-mode-area single-mode fiber connector is simple in structure and easy to manufacture, the end face of the large-mode-area single-mode fiber connector is easily ensured to be clean, the light-passing area is large, and the matching connection with the traditional other fiber movable connectors can be achieved.
Owner:TIANJIN POLYTECHNIC UNIV

Bicycle parking frame capable of being assembled

The invention discloses a bicycle parking frame capable of being assembled. The bicycle parking frame comprises parking frame bodies and parking units. The parking units are arranged on the parking frame bodies. Each parking unit comprises a parking unit frame, a lifting guide frame, a lifting mechanism and a hanging mechanism. The side face of the top of each parking unit frame is provided with aU-shaped groove and the side face of the bottom of each parking unit frame is provided with angle iron. Guide wheel sets are arranged on each U-shaped groove and the corresponding angle iron. Each parking unit frame is connected with the corresponding lifting guide frame through the two guide wheel sets. Each lifting mechanism comprises a motor, a lead screw, a lead screw nut and a lifting sliding board. The bicycle parking frame is reasonable in structural design, by the adoption of the design that the parking frame bodies and the parking units are combined, the multiple parking units can beassembled and installed in different arrangement modes, the structure is simpler, the occupied area is smaller, the manufacturing cost is lower, installation is convenient, bicycles are stored and taken easily and parked tidily, and the bicycle parking frame is suitable for parking of the bicycles in a public place.
Owner:JIANGSU UNIV OF TECH

Method for manufacturing plant fibre composite wall plate

Provided is a process for preparing a plant fiber composite wall plate, belonging to wall material field. The invention resolves the shortages that the raw material of the existing architectural wall material is large in consumption, the manufacture cost is high and the distribution of the raw material is non-uniform. The process steps of the invention are that crop straw is cleaned and cut into pieces and is ground by a fiber re-chipper, and then is dried after dust and big lump material are screened. The prepared raw material is sent into a glue blend machine and is added with adhesive agent of 10-16%. After being uniformly stirred, the raw material and the added adhesive agent are taken out, added with fire retarding agent and paved, and then are cut in standard size after being pre-pressed, hot-press-molded and cooled. The plate in standard size is combined with polystyrene plates via different layers and thicknesses, the surfaces thereof are stuck with melamine fireproof plates, and then the plant fiber composite wall plate is formed via the combination. The product obtained by the process has the advantages of low density, light weight, perfect insulation, simple technology, large raw material source, low manufacture cost, waste utilization and environment protection. The invention can be used to produce building separating walls, framed wood structural buildings, mobile movable dwellings, and buildings in tourist spots and the like.
Owner:NORTHEAST FORESTRY UNIVERSITY
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