828results about How to "Simple equipment" patented technology

Apparatus and method for fixing electrodes in a blood vessel

InactiveUS6161029ASimple equipmentElectrocardiographyTransvascular endocardial electrodesBlood vessel wallsLeft Ventricles
Endocardial implantable cardiac leads are disclosed for applying electrical stimulation to and/or sensing electrical activity of the heart at one or more distal electrode positioned at a cardiac implantation site within a cardiac vessel adjacent to and at a desired orientation to the left ventricle or atrium of the heart. The distal electrode(s) is supported by a tubular electrode support having a diameter large enough to bear against the blood vessel wall and a support lumen that allows blood to flow through it. A retention stent extends proximally from a distal stent end fixed to the tubular electrode support to a proximal stent end. After advancement to the cardiac implantation site employing a lead delivery mechanism, the retention stent is expandable from a collapsed stent state in which the outer diameter of the retention stent is less than the inner diameter of the vessel to an expanded stent state. The expanded stent is lodged against the blood vessel wall and inhibits movement of the stent and distal electrode support. The expanded stent lumen is aligned with the electrode support lumen for allowing blood to flow through the aligned electrode support lumen and expanded stent lumen. The retention stent may take any of the known forms that can be introduced in the collapsed stent state within an introducer lumen or mounted to an introducer and can either self-expand upon release in the blood vessel or be mechanically expanded within the blood vessel.

Vehicle speed measurement method, supervisory computer and vehicle speed measurement system

The invention discloses a vehicle speed measurement method, a supervisory computer and a vehicle speed measurement system. The method comprises the following steps of: receiving multiframe images collected by a close-up camera aiming at a vehicle to be tested according to a preset frequency by the supervisory computer; calculating the running track of a licence plate, and selecting the multiframe image with correct track as an image group to be analyzed; and tracking and calculating the imaging distance of the licence plate in the image group to be analyzed, calculating the actual distance corresponding to the imaging distance according to the correspondence between a real world coordinate system and an imaging coordinate system, dividing the actual distance by the time difference of the corresponding image obtained by calculating according to the preset frequency to obtain the current tracking vehicle speed, and averaging to obtain the vehicle speed of the vehicle to be tested. The supervisory computer comprises a receiving module, an image selecting module and a speed calculating module. The system comprises the close-up camera, a supplementary light source and the supervisory computer. The invention needs no extra vehicle speed detection equipment or a plurality of cameras for matching, has convenient installation, simple equipment and more flexible and various application scenes, and has the advantages of strong robustness and high speed measurement precision.

Quadruple frequency-based scheme for realizing base station passive full duplex millimeter wave RoF link

InactiveCN101742738ASimple equipmentStrong practical operabilityRadio-over-fibreWireless communicationSidebandBroadband
The invention discloses a quadruple frequency-based scheme for realizing a base station passive full duplex millimeter wave RoF link, which is mainly used for remote transmission of a wireless signal between a base station and a central station in a Gb/s broadband millimeter wave communication system. The scheme is as shown in an attached drawing. A local oscillator with a frequency of fD/4 drives a lithium niobate Mach-Zehnder modulator to produce a light carrier with a frequency interval of fD/2 and two second-order sidebands. One sideband is separated by an FBG to realize single wave carrier modulation of a downlink data signal. The light carrier is transmitted to the base station through an optical fiber, and the light carrier and a double-frequency light millimeter wave signal with a frequency of fD are separated by the Mach-Zehnder modulator with a delay time difference of 1/fD. The former is reserved as an uplink light source, and the latter produces a millimeter wave signal with the frequency of fD through photoelectric conversion, and the signal is transmitted to a user through an antenna. The uplink millimeter wave signal is processed by envelope detection to acquire a baseband signal, loaded onto a reserved light wave by a low-speed optical modulator and sent back to the central station by the optical fiber. The scheme has a plurality of advantages, so that the scheme has good application prospect.

Method for connecting thermoplastic composite with metal

ActiveCN106113484AFast connectionSimple equipmentPower flowThermoplastic composites
The invention relates to the field of connecting of dissimilar materials. A method for connecting a thermoplastic composite with metal comprises the following steps that firstly, a to-be-welded surface of a to-be-welded metal piece and a to-be-welded surface of a to-be-welded thermoplastic composite piece are roughened; secondly, the to-be-welded metal piece and the to-be-welded thermoplastic composite piece are spliced together and fixed; thirdly, an induction heating device is placed above a welding area; fourthly, induction current generated in the metal piece by a magnetic field at the end of a coil is used for heating the metal piece, and matrix resin in the thermoplastic composite absorbs heat to be molten; and fifthly, the induction heating device is started, the coil of the induction heating device is moved in the welding direction, the molten matrix resin is cooled, a connector between the molten matrix resin and the metal piece is formed, and continuous welding of the thermoplastic composite and the metal is achieved. According to the method for connecting the thermoplastic composite with the metal, acceleration is high, equipment is simple, the method can be applied to welding of large three-dimensional curved-surface components in complex shapes, and meanwhile, use of electromagnetic sensitive materials is avoided.

Method for preparing nano indium oxide with controllable appearance by hydrothermal method

InactiveCN101857263ASimple equipmentSimple production processGallium/indium/thallium compoundsAir atmosphereUrea
The invention relates to a method for preparing nano indium oxide with controllable appearance by a hydrothermal method. The method comprises the following steps of: (1) weighing soluble indium salt and urea in a molar ratio of 1:2-1:15, and adding de-ionized water into the mixture to prepare uniform colorless transparent solution with magnetic stirring; then transferring the solution to the inner lining of a reaction kettle; preserving the heat at the temperature of between 120 and 140 DEG C to perform reaction for 12 to 24 hours; cooling the reaction product to room temperature; and performing centrifugal separation, and washing and drying the product to prepare a white precursor In(OH)3; and (2) calcining the dried indium hydroxide for 2 to 3 hours in air atmosphere at the temperature of between 450 and 550 DEG C to prepare slightly yellow indium oxide powder. The preparation method has the advantages of simple process, low production cost and capability of preparing the indium hydroxide nanostructures with various appearances by only adjusting and controlling the ratio of the raw materials without any template, surfactant or structure directing agent, and provides a convenient method for synthesizing the nano indium oxide with controllable appearance.

Polymer hollow nano microspheres and preparation method thereof

The invention discloses polymer hollow nano microspheres and a preparation method thereof. The preparation method is characterized by comprising the following steps: adding 10-200 parts by weight of polymer A, 0-200 parts by weight of additive and 100-1000 parts by weight of solvent A into a dissolving kettle provided with a stirrer and a thermometer, dissolving by stirring at 30-100 DEG C, debubbling, and aging to obtain a polymer shell solution; adding 0-400 parts by weight of polymer B and 100-1000 parts by weight of solvent B into a dissolving kettle provided with a stirrer and a thermometer, dissolving by stirring at 30-100 DEG C, debubbling and aging to obtain a core solution; putting the polymer shell solution and the core solution in a high-voltage electrostatic field, and carrying out electrostatic spraying by a coaxial electrostatic sprayer to obtain polymer microspheres, wherein the inner diameter of the needle head of the core is 0.4-0.6mm, the solution flow rate is 1-5ml/h, the inner diameter of the needle head of the shell is 0.9-1.2mm, the solution flow rate is 5-10ml/h, the spraying voltage is adjusted to 5-25kV, the spraying distance is 1-10cm, and the temperature of the receiving bath is 10-50 DEG C; and removing core substances of the microspheres to obtain the polymer hollow nano microspheres.
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