31results about How to "Does not compromise structural integrity" patented technology

The invention relates to a fiber winding pressure container with an on-line monitoring function and a manufacturing process thereof. The fiber winding pressure container comprises a liner, and the liner surface is provided with a fiber composite winding layer provided with a conductive sensing network for collecting electrical signals. The manufacturing process comprises the steps that a conductive nano material is added to a volatile solvent and stirred to prepare a conductive nanometer solution; a metal template is placed on the surface of the fiber composite winding layer to be wound on the outer layer of the liner; the conductive nanometer solution is sprayed on the fiber composite winding layer through the metal template; and the fiber composite winding layer is heated, so that the volatile solvent is completely evaporated, and the conductive sensing network is formed on the surface of the fiber composite winding layer. Compared with the prior art, the fiber winding pressure container has the advantages of being simple, reliable, capable of achieving on-line monitoring and the like.

The invention relates to the technical field of metal-based composite materials, and specifically discloses a boron-doped graphene-reinforced copper-based composite material and a preparation method thereof. The copper-based composite material of the present invention uses boron-doped graphene as a reinforcing body, effectively increases the bonding interface between copper and graphene, and improves the electron transmission at the interface. Among them, boron-doped graphene is boron-doped on the complete graphene sheet, which basically does not destroy the structural integrity of graphene. The electron transport performance of graphene after boron doping is better, and Cu-B-C bonds can be formed between graphene and copper substrate, taking into account interface bonding and electron transport. The invention combines graphene doping, copper raw material and reinforcement mixing, heat treatment and other processes to successfully prepare a copper-based composite material with uniform distribution of boron-doped graphene. Experiments have proved that the tensile strength of the boron-doped graphene-reinforced copper matrix composite is not lower than 308.6 MPa, and the electrical conductivity is not lower than 90.6% IACS.

A transformer digital protection device and method based on full pressure information, including: a transient oil pressure characteristic quantity measurement module, a switch input module, a signal conditioning and acquisition module, and a digital core module; wherein, the transient oil pressure characteristic quantity measurement The module is connected with the signal conditioning and acquisition module, and the signal conditioning and acquisition module and the digital input module are all connected with the digital core module. The invention obtains the digital information of transient oil pressure at multiple measuring points inside the oil tank in real time, calculates and obtains the full value of the operating pressure representing the amplitude of the oil pressure, and utilizes the significant difference of the characteristic value under different operating conditions of the transformer to construct the protection criterion and the threshold value The setting method realizes reliable, rapid and sensitive screening and removal of internal faults in the transformer oil tank, and is not affected by the excitation inrush current. The principle of the invention is simple, the device is easy to implement, and it is suitable for the current and future requirements of large-capacity and high-voltage power transformers for non-electrical protection "four properties".

A mullion connection system for resisting wind load reactions using a connection clip structurally engaged with a mullion without a hole or a fastener penetrating into the mullion surface. The connection clip can undergo stress-free vertical sliding relative to the mullion along the entire length of the mullion without impairing the structural connection strength; therefore, the building construction tolerance in the vertical direction is eliminated as a design consideration of the curtain wall system. The design also eliminates the need for pre-fabricating mullion holes for the connection locations. The design does not require the pre-determination of the elevation of the connecting point and thus is most beneficial for a curtain wall renovation project where the available locations in the building structure for structural connection cannot be determined prior to the demolition of the existing wall. The uninterrupted mullion tube cavities can be conveniently utilized for inter-floor distribution of utility lines.

The invention provides a near-field communication antenna device, which belongs to the field of wireless communication. The antenna device is an antenna device formed in a mobile electronic device, including: a shell conductor layer, an insulating layer, a coil conductor, a flexible substrate and a magnetic material layer; The other side of the flexible substrate to which it is attached is equipped with a magnetic material; the shell conductor layer divides the shielding of the coil conductor into two areas: the first area is the non-shell conductor layer shielding part, that is, the actual magnetic link coupling part of the antenna. The area is covered with magnetic materials to improve the magnetic field radiation capability of the antenna; the second area is the shielding part of the shell conductor layer, which is not covered with magnetic materials to reduce the ohmic loss of the antenna caused by the loss of magnetic materials and reduce the The magnetic field density in the area is improved, while reducing the eddy current loss caused by the conductor layer, and improving the reading and writing distance of the antenna device.

The invention relates to a high-strength film-coated sand core for sand casting, a manufacturing machine and a manufacturing process. The core includes a core body, a core bone body, reinforcements, connectors and connecting bolts. A special The manufacturing machine includes a feeding mechanism, a crushing mechanism and a shell, and the feeding mechanism and the crushing mechanism are installed in the shell. The method for making the above-mentioned mold core by using the above-mentioned making machine includes the following steps: coated sand manufacturing, core box manufacturing Core, core trimming and core inspection. The present invention provides a high-strength film-coated sand core for sand casting. The various parts of the mandrel are connected in a detachable manner. After the mandrel is disassembled, the mandrel can be taken out from a narrow space without damage. The structural integrity of the core bone can be realized multiple times.

The invention discloses a switching piece for fibrous vitrolite dry hanging and a fibrous vitrolite dry hanging method. Each switching piece comprises a first groove body and a second groove body of which the two groove openings are in opposite direction and the cross sections are U-shaped, wherein a groove wall on one side of the first groove body serves as a groove wall on one side of the second groove body. The dry hanging method comprises the following steps: grooving is performed on the two ends of the bonding layer of a fibrous vitrolite, the two ends of the inner layer plate of the fibrous vitrolite are both inserted into the first groove body of one switching piece, a gap between the first groove body and the inner layer plate and a gap between the first groove body and the outer layer are filled with fixing glue, the second groove bodies of two switching pieces are filled with fixing glue so as to be respectively and fixedly provided with insertion parts of corresponding hanging pieces, and the two groove bodies are fixedly connected with a keel system through fixing parts of all hanging pieces, so as to achieve vibrous vitrolite dry hanging. The switching piece provided by the invention is firm and durable, mechanical force is mainly used for achieving dry hanging of the vibrous vitrolite, and after dry hanging, the vibrous vitrolite has a good loaded property and is less susceptible to dropping off. The switching piece provided by the invention can achieve flatness adjustment of the vibrous vitrolite, and the the attractive appearance of the vibrous vitrolite is ensured.

The invention discloses a preparation method of a fibroin fluorescent probe. The method comprises the following steps: screening a phage library by using a fibroin material to obtain a phage specifically bonded with fibroin proteins; carrying out gene sequencing; using an amino acid sequence corresponding to the gene obtained by sequencing as a fibroin affinity peptide primary sequence; carrying out polypeptide synthesis on the fibroin affinity peptide primary sequence by adopting a polypeptide synthesis technology to obtain fibroin affinity peptide powder; and bonding the fibroin affinity peptide powder with fluorescein to obtain a fibroin fluorescent probe. The phage screened by the invention has very high affinity to the fibroin material, is high in probe sensitivity, high in detection speed and wide in application prospect, and provides more choices for high-efficient targeting and identification of the fibroin protein and the fibroin material.

The invention provides a sheet-shaped acoustic black hole energy harvester group device, comprising a plurality of acoustic black hole energy harvesters and a lower bottom sealing plate of the energy harvester group, and a plurality of acoustic black hole energy harvesters are sequentially bonded and connected; a plurality of acoustic black hole energy harvesters The black hole energy harvester is firmly connected with the lower bottom sealing plate of the energy harvester group. The invention can adjust many parameters, has good vibration reduction effect, is suitable for solving the problem of low-frequency vibration, covers a wide frequency range, and overcomes the shortcomings of low structural strength and weak bearing capacity of the traditional acoustic black hole. In the application of vibration reduction, multiple energy harvester group devices can be arranged in a tiled manner, and acoustic black hole energy harvesters with different structural size parameters can be combined arbitrarily. On the basis of not destroying the integrity of the structure and reducing the safety of the structure, the "swallowing and capturing" function of vibrating in the specified frequency band has been realized. The invention can realize designable control of low-frequency, medium-frequency and high-frequency vibrations. The additional mass of the acoustic black hole energy harvester is small, the realization method is simple and flexible, and the energy absorption efficiency can be adjusted in any combination.

The invention belongs to the field of wireless communication, and relates to an antenna device used in a short-distance wireless communication system. The antenna device is an antenna device formed in a mobile electronic device, including: a coil conductor, a flexible substrate, a magnetic material and a shell conductor layer. The coil conductor is an annular or helical coil with the winding center as the coil opening, and the flexible substrate attached to it is assembled on the surface of the magnetic sheet material. The shell conductor layer divides the shielding of the coil conductor into two areas: the first area is the shielding part of the non-shell conductor layer, that is, the actual magnetic link coupling part of the antenna, and the coil conductor of this part adopts a narrow line width design or most of it adopts a narrow line width design , and use the parallel design of double conductor layers; the second area is the shielding part of the shell conductor layer, and the coil conductor in this area is designed with wide lines. The invention has the positive effects of not destroying the structural integrity of the metal part of the casing of the mobile device, occupying a small space and having high performance.