45results about How to "There is a lot of room for improvement" patented technology

The invention provides a fuel cell stainless steel bipolar plate preparation and surface modification method, which belongs to the technical field of fuel cells. The method comprises steps: the stainless steel bipolar plate is firstly prepared; and stainless steel bipolar plate surface modification is then carried out. After the stainless steel bipolar plate is prepared through chemical etching, with N,N-dimethyl acetamide (DMAC) as a solvent, nanocarbon / graphite as a conductive material and polyimide resin solution (PI) / phenolic resin solution (PF) as an adhesive, a nanocarbon / PI / PF mixed coating (S1) with a carbon content of 10 to 30% and a nanocarbon / PI / PF mixed coating (S2) with a conductive material content of 40 to 70% are prepared respectively. Then, in a nitrogen atomization spray method, spray is carried out on the stainless steel bipolar plate. Finally, through low temperature hot pressing treatment, the electrical conductivity and the corrosion resistance of the coating on the ridge of the stainless steel bipolar plate are improved, and the contact resistance with carbon paper is reduced. The process is simple and efficient, the coating has good corrosion resistance and strong electrical conductivity, and the bonding force between the coating and the substrate is strong.

The invention relates to the technical field of corn seeding machines, in particular to a mechanism for compensating driving horizontal speed of an eccentric gear of a corn dibbling machine. The mechanism comprises a driving eccentric gear and a driven eccentric gear which are engaged, wherein the driving eccentric gear and a power input chain wheel are fixedly connected by a power input shaft; the driven eccentric gear and a driving crank are fixedly connected by a driving crankshaft; the driving crank, a driven crank, a hole sowing rod and a machine frame are connected into a parallel four-rod mechanism by hinges; the hole sowing rod is vertically and glidingly connected with a first slide block and a second slide block; the first slide block is connected with the upper end of the hole sowing rod through a damping spring; a first chain wheel is fixedly connected with the driving crankshaft, and a second chain wheel is fixedly connected with the driven crankshaft; the first chain wheel and the second chain wheel are connected by a chain; mounted bearings are arranged on the driving crankshaft and the driven crankshaft. The mechanism has the advantages that the hole sowing rod is guaranteed to be vertically inserted into soil and plugged out of soil, the disturbance to the soil layer is reduced, the damage degree to a ground film is reduced, the productivity of precise seedingof corn is improved, and the labor intensity is decreased.

The invention provides a high-temperature proton exchange membrane in a hydrophobic gel base and a preparation method and an application thereof, and particularly relates to a method in which a hydrophobic gel membrane is prepared from a hydrophilic monomer and amphiphilic macromolecules by graft modification, a methanol solution of a proton conductor is absorbed and the high-temperature proton exchange membrane can be prepared in the hydrophobic gel base in a vacuum drying manner. The proton conductivity of the synthetized hydrophobic gel base proton exchange membrane can achieve 0.001-0.02S.cm<-1> at the temperature of 180 DEG C and under a waterless environment. The preparation method disclosed by the invention is different from that of the proton exchange membrane doped with the conventional proton conductor. According to the preparation method, the unique adsorbability, a porous structure, and the retainability of the hydrophobic gel membrane are fully utilized to absorb the proton conductor into a three-dimensional net structure of the hydrophobic gel membrane so as to firmly seal the proton conductor. The high-temperature proton exchange membrane in the hydrophobic gel base, disclosed by the invention, is large in adsorption amount of the proton conductor, high in proton conductivity, wide in operating temperature range, low in cost, and large in improvement space, and the preparation method is simple and feasible.

The invention discloses a multifunctional knee joint rehabilitation instrument which comprises a bearing body comprising a work surface, a shank supporting part, a thigh supporting part, a knee support and a magnetic heating device, wherein the bearing body is provided with at least two guide rail structures which are distributed on the work surface or on the two sides of the work surface in parallel; the shank supporting part is obliquely arranged on the work surface, and the end of the shank supporting part can be movably arranged on the guide rail structures and connected with a power device A; the thigh supporting part and the shank supporting part form an inverted V-shaped structure, the thigh supporting part is provided with a non-retractable portion, a retractable portion and a power device B, one end of the non-retractable portion is hinged to the bearing body, one end of the retractable portion is hinged to the end, not connected with the power device A, of the shank supporting part, and the power device B is arranged between the non-retractable portion and the retractable portion; the knee support is used for supporting a knee joint and performing the function of stretching the knee joint, and the knee support is arranged on the connection portion of a large supporting part and a small supporting part; the magnetic heating device is arranged on the bearing body through a lifting device and located above the knee support. A magnetic heating therapeutic instrument and a knee joint moving assembly are integrated, so that the multifunctional knee joint rehabilitation instrument can achieve three therapeutic methods at the same time, and time is saved.

The invention discloses an omnidirectional mobile multi-load AGV control system and a control method thereof, including a main control module and a power supply module for power supply; a steering control module for controlling the precise steering of the AGV; and a drive control module for controlling the AGV at a certain speed Forward and backward; the multi-cargo transfer module is used to control the AGV to move to the place where the goods are to be picked up to accurately take out the items on the shelf; the human-computer interaction module displays the AGV running status information in real time; the communication module is convenient for the main control module and the mobile terminal communication. The steering control module, drive control module, multi-cargo transfer module, human-computer interaction module, and communication module are all electrically connected to the main control unit. The control system can control the movement of the omnidirectional multi-load AGV proposed in the existing scheme The process performs precise motion control, and can switch the motion mode according to different motion modes, and control the AGV to complete the precise storage and retrieval tasks after reaching the designated position.

The invention provides a sliding power generator based on a reductive oxidized graphene film and a preparation method and application of power generator. The preparation method comprises the following steps that natural graphite powder generates oxidized graphite under the condition of a strong oxidizing agent, the oxidized graphite prepares oxidized graphene via ultrasound, a film is formed via pumping filtration and hot pressing, and the film is reduced to prepare the reductive oxidized graphene film; and the sliding power generator is assembled by dropping seawater and NaCl brine on the surface of the reductive oxidized graphene film. The sensitivity, conductivity and adsorptivity to external simulation of the graphene are fully utilized, seawater and NaCl brine are dropped on the surface of the oxidized graphene film to generate voltage and current signals, the reductive oxidized graphene film is high in stability and conductivity, low in cost, simple in preparation method and large in improvement space, and the sliding power generator is simple in structure, high in maneuverability and excellent in performance.

The invention provides a double-sided inorganic perovskite solar cell doped with alkali metal ions and alkaline earth metal ions and a preparation method and application thereof. An electron transportmaterial is deposited on FTO conductive glass, and then a precursor solution of the perovskite light absorbing material doped with the alkali metal ions and the alkaline earth metal ions is continuously spin-coated so as to form a perovskite light absorbing layer with excellent performance. Finally a carbon electrode is coated in a blading way, and two symmetrical inorganic CsPbBr3 perovskite solar cell devices are closely combined by the same carbon electrode through vacuum treatment so as to manufacture the double-sided inorganic CsPbBr3 perovskite solar cell. The crystal size of perovskiteis reduced, the band gap is reduced and the photoelectric conversion efficiency and stability of the cell are improved by the kinds and the proportion of the doped alkali metal and alkaline earth metal ions so as to have the advantages of simple preparation method, no hole transport layer, large improvement space of material and technology and the like.