48 results about "Smart surfaces" patented technology

An electrosurgical instrument and method for treating varicose veins. In one embodiment, an elongate catheter has a distal working end that carries an electrosurgical energy delivery surface comprising at least one electrode with a positive temperature coefficient of resistance (PTCR) surface and / or an electrode with a pressure sensitive variable resistance to provide a smart surface for controlling Rf current flow at the interface of electrosurgical surface and the tissue. The electrode surface then can limit or modulate Rf energy delivery through the surface in response to the temperature of the surface or the engagement pressure of the surface against the engaged tissue. In operation, the smart electrosurgical surface prevents arcing at the electrode-tissue interface, and thus controls ohmic heating to prevent tissue desiccation, charring and emboli formation.

A separating system for separating a fluid mixture incorporates a smart surface having reversibly switchable properties. A voltage is selectively applied to the smart surface to attract or repel constituents of a fluid mixture, such as oil and water produced from a hydrocarbon well. The smart surface can be used in a conditioner to increase droplet size prior to entering a conventional separator, or the smart surface and other elements of the invention can be incorporated into an otherwise conventional separator to enhance separation. In a related aspect, a concentration sensor incorporating smart surfaces senses concentration of the fluid mixture's constituents.

The invention discloses a method for utilizing PDPAEMA modified shape memory polymers to regulate and control surface permeability, and relates to the method for regulating and controlling the surfacepermeability of materials. The method comprises the main steps of 1, etching silicon wafers by means of photolithography; 2, shaping the silicon wafers by utilizing PDMS; 3, shaping a shape memory epoxy resin micro-array by utilizing a PDMS template; 4, grafting poly2-(diisopropylaminoethyl methacrylate) (PDPAEMA) on the surface of the epoxy resin micro-array; 5, regulating and controlling the surface permeability by utilizing a sample obtained in the step 4. The method has the advantages that surface microstructure regulation and control is combined with surface pH response molecules for thefirst time, through the synergistic effect of physical regulation and control and chemical regulation and control, the controllable permeability conversion on the same surface is achieved from a super-hydrophilic mode to a super-hydrophobic mode, the obtained intelligent surface can be used for surface cell, oil-water separation and the like of intelligent devices, and the method is a novel preparation technology of response surfaces.

A monitoring system includes an array of concatenated sensing nodes, with each sensing node being configured to have at least one of near-field and far-field RF coupling circuitry to interface with an adjacent sensing node. A respective device is coupled to each of the sensing nodes. A reader device is configured to have at least one of near-field and far-field RF coupling circuitry to interface with the array of concatenated sensing nodes to read data from the devices.

The invention relates to an industrial-grade intelligent surface defect detection method. By constructing and training a twin generation adversarial network GAN, the input image is repaired into a "normal sample" through an improved GAN network, and the output is compared with a manually labeled positive sample through the twin The CNN network is compared, and the difference is a defect. The twin generation adversarial network designed by the present invention does not require a large number of samples or data amplification, which can solve the problem of small sample sizes of common industrial products and reduce the occurrence of over-fitting phenomena caused by deep learning with few samples and zero samples. , making it possible to detect defects in products with a small number of defective samples and in new product development. The cross alignment loss function CA and the distribution alignment loss function DA are used to strengthen the relationship between the outputs of the two networks and achieve better classification and recognition results. The model training speed is improved through the Attention mechanism and hardware GPU, making rapid industrial deployment possible.

The invention discloses a surface capable of pneumatically controlling wettability, a preparation method thereof, and an application thereof in drop collection, and belongs to the technical field of intelligent surfaces. The surface comprises a bottom-layer substrate layer, a gas path structural layer, a cover layer and an external gas path from the bottom up, wherein the gas path structural layer is composed of a plurality of air paths formed by a series of concave grooves, and raised platforms between the adjacent gas paths; the cover layer is bonded with the raised platforms of the gas path structural layer and a part of exposed bottom-layer substrate layer around the gas path structural layer, and a fitting area is formed by the bound areas; tiny air bags are formed in the cover layer area on branches, and the tiny air bags of the cover layer can be controlled to be fully raised or sunk via inflating or deflating; a pneumatically responding structure formed by the series of periodically distributed raised tiny air bags is embedded into the surface, and meanwhile nano structures are used for modifying the surface to acquire a micro-nano multilevel structure, raising or sinking of the air bags are controlled by inflating or deflating; and thus intelligent control on wettability of the surface is achieved by pneumatically changing the surface structure.

The invention discloses a space modulation antenna selection method assisted by an intelligent surface in a high-speed rail scene, belonging to the field of rail transit wireless communication. The method includes the following steps: firstly, the spatial modulation system assisted by the smart surface in the high-speed rail scene is given; then, the angle of arrival is estimated by using the pilot signal, and the phase of each reflection unit of the smart surface is adjusted according to the estimated value, and at the same time based on the maximum received signal The noise ratio is used to filter the spatial modulation index antenna; finally, according to the current position and speed direction of the train, the phase of each unit of the smart surface is further adjusted to eliminate the Doppler frequency shift, and the effective antenna unit of the smart surface is selected based on the maximum receiving complex envelope. The present invention jointly screens the receiving index antenna and the effective antenna unit of the intelligent surface, while eliminating the multipath scattering Doppler frequency shift, and maximizing the receiving signal-to-noise ratio, thereby improving the spectrum efficiency and bit error rate of the system.

The embodiment of the present application provides an adjustable electromagnetic array element and a smart surface. Wherein, the adjustable electromagnetic array element includes a reflective unit and a parasitic unit, and the reflective unit includes: at least one reflective metal sheet; at least one adjustable element, the adjustable element is electrically connected to the reflective metal sheet, and the adjustable element is used for adjusting and controlling according to the control signal The electromagnetic parameters of the electromagnetic array element; the parasitic unit is arranged around the reflective metal sheet, and the parasitic unit is coupled and connected with the reflective metal sheet. In the embodiment of the present application, a parasitic smart surface is formed by setting a parasitic unit around the reflective unit of an adjustable electromagnetic array element, and the constitutive parameters of the smart surface are changed by using the coupling effect between the parasitic unit and the electromagnetic array element, thereby reducing the smart surface. The reflection loss improves the stability of the phase response of the smart surface, which is conducive to breaking through the performance limitations of the array element layout and the dielectric substrate on the smart surface, and improving the reliability of the multi-bit multi-polarization RIS solution.