33results about How to "Avoid performance damage" patented technology

A method for manufacturing a thin film structural system including a thin film structure includes depositing a reinforcing material in a liquid form in a predefined pattern on a thin film membrane, and transforming the reinforcing material in the predefined pattern to form a reinforcing element connected to the thin film membrane. The reinforcing material may be deposited in a melted form and solidified by cooling, may be transformed by a light or laser induced chemical reaction, or may be deposited and solidified such that the reinforcing element is at least partially embedded in the thin film membrane. The predefined pattern may redistribute loads around a damaged portion of the thin film structure, or define a hinge, a folding line, a stiffening feature. The reinforcing element may be electrically, optically or thermally conductive, to communicate with a device included in the system. The system may be a space structure.

The invention discloses a surface-modified aramid fiber and a preparation method thereof. Immerse the cleaned aramid fibers in a dopamine solution under weak alkaline conditions to obtain dopamine-coated aramid fibers; through the esterification reaction and π-π interaction between graphene oxide and dopamine-coated aramid fibers , A graphene oxide layer with a high grafting rate is formed on the surface of the aramid fiber to prepare a surface-modified aramid fiber. It has excellent UV resistance and contains a large number of active groups, which obviously improves the surface activity of aramid fibers and provides conditions for further modification and application of fibers. At the same time, in the process of modifying the aramid fiber, the present invention does not need to pretreat the aramid fiber, the preparation process is green and environmentally friendly, the operation process is simple and controllable, and it is suitable for large-scale industrial production.

The invention provides a fast steel bar straightener and a method for utilizing the straightener for straightening steel bars, relates to the technical field of steel bar machining, and aims at the problems that when a reserved steel bar straightening method frequently used in an existing reverse construction method is used, the straightening efficiency is low, the straightening effect is poor, and the adverse effect on the mechanical property of the reserved steel bars is caused. The straightener comprises a sleeve and a hydraulic device which are communicated. At least two hydraulic jack assemblies are arranged on the inner wall of the sleeve. Each hydraulic jack assembly is provided with three separated hydraulic jacks uniformly distributed in the radial direction of the axis and communicated with the hydraulic device. The separated hydraulic jacks can be ejected in under the effect of the hydraulic device, so that the steel bars penetrating through the sleeve are hooped and straightened. The method comprises the steps that 1, the reserved steel bars penetrate through the sleeve so as to be enclosed among the separated hydraulic jacks; 2, the reserved steel bars are extruded, hooped and straightened gradually by the separated hydraulic jacks; 3, the step 1 and the step 2 are repeated to gradually straighten the reserved steel bars from the fixed ends to the free ends.

The invention provides a method for nanoparticle-driven low-energy ultrasonic metal welding, which includes: preparing nanoparticle paste or powder; coating the surface to be welded with 1-50 μm thick nanoparticle paste or powder on the upper and lower layers of the metal to be welded, Ultrasonic welding is then performed at room temperature or under heating. Adopting the technical scheme of the present invention, the traditional solid-phase connection at the peak of the rough surface in the ultrasonic welding process, as well as the size effect, frictional heating effect and gap filling effect of the nano-particles in the gap are integrated, thereby realizing lower ultrasonic welding input energy Form a good ultrasonic welded joint, simplify the production process, reduce the impact of the material to be welded, and improve the sealing performance of the weld seam, the mechanical properties of the welded joint, and the electrical and thermal conductivity.

An orthopedic guide reduction forceps belongs to the field of orthopedic medical instruments. The left clamp body (1) is fixed on a fixed plate (5) through the rotation of the left rotating shaft (3), the right clamp body (2) is fixed on the fixed plate (5) through the rotation of the right rotating shaft (4), and the left clamp body (1 ) and the right clamp body (2) are provided with an equal-angle swing mechanism, and a sleeve (6) is provided at the front end of the right clamp body (2). The sleeve (6) rotates around the swing center point (601), and the sleeve ( 6) The right end is provided with a hinge point (602) and an adjustment rod (9) is hinged, and the lower end of the adjustment rod (9) is hinged at the positioning hole (8) on the right side of the fixed plate (5) at the swing center point (601) to The length of the hinge point (602) is equal to the center distance between the positioning hole (8) and the right shaft (4), and the adjusting rod (9) makes the sleeve (6) always point to the front end of the left clamp body (1). The invention has the advantages of accurate guiding and positioning, convenient use, minimally invasive surgical treatment and the like.

The invention provides a method for controlling a high-orbit satellite lithium ion battery pack. Voltage, current and temperature parameters of a satellite battery pack within different flight periodsof an illumination season and an earth shadow season are monitored; and calculation and monitoring are carried out by introducing an additional charging threshold and a discharge capacity and thresholds of different flight periods are corrected to realize precise controlling of the storage battery pack during the in-orbit operation period of the satellite. Therefore, the control flow is simplified; the stability is improved; and the emergency condition can be predicted in advance.

The invention proposes a charged particle shielding device for a space optical detector based on an electromagnetic compound field, which includes an electric field and magnetic field generating device, a leakage electromagnetic shielding device, a charged particle internal absorption and anti-scattering device, and a lens barrel support structure. The electric field generating device generates a deflection electric field parallel to the axis of the device and opposite to the incident direction of the charged particles, the magnetic field generating device generates a deflection magnetic field perpendicular to the direction of the deflection electric field, the electric field generating device and the magnetic field generating device work together to generate a deflection electromagnetic composite field, The leakage electromagnetic shielding device confines the deflection electromagnetic composite field in the charged particle shielding device, the charged particle internal absorption and anti-scattering device can absorb the charged particles deflected to the inner wall of the structure, and the lens barrel support structure realizes the integration of each structure, and Provide the installation interface of the charged particle shielding device, which can realize the shielding of protons and electrons at the same time, and has the advantages of simple principle, easy realization, mature technology and strong versatility.

A multifunctional device for delaying chest closure of the present invention, comprising: a housing, a first slot body, and a second slot body, the cross section of the housing is octagonal, and the bottom end of the housing is provided with an opening. An adhesive tape is arranged on the opening, and a first draw-in groove body and a second draw-in groove body are relatively arranged in the casing, and the first draw-in groove body and the second draw-in groove body can move relatively. The object of the present invention is to provide a multi-functional device for delaying chest closure, which has simple structure, convenient operation, firm fixation, adjustable sternal distraction distance, and is beneficial to postoperative experimental chest closure; no suture is required, transparent and direct viewing , which is good for observation; convenient for washing, reducing the risk of infection; reliable drainage, avoiding iatrogenic injury, and shortening the operation time as a whole.