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136 results about "Electrode insertion" patented technology

High frequency thermal ablation of cancerous tumors and functional targets with image data assistance

This invention relates to the destruction of pathological volumes or target structures such as cancerous tumors or aberrant functional target tissue volumes by direct thermal destruction. In the case of a tumor, the destruction is implemented in one embodiment of the invention by percutaneous insertion of one or more radiofrequency probes into the tumor and raising the temperature of the tumor volume by connection of these probes to a radiofrequency generator outside of the body so that the isotherm of tissue destruction enshrouds the tumor. The ablation isotherm may be predetermined and graded by proper choice of electrode geometry and radiofrequency (rf) power applied to the electrode with or without temperature monitoring of the ablation process. Preplanning of the rf electrode insertion can be done by imaging of the tumor by various imaging modalities and selecting the appropriate electrode tip size and temperature to satisfactorily destroy the tumor volume. Computation of the correct three-dimensional position of the electrode may be done as part of the method, and the planning and control of the process may be done using graphic displays of the imaging data and the rf ablation parameters. Specific electrode geometries with adjustable tip lengths are included in the invention to optimize the electrodes to the predetermined image tumor size.
Owner:COVIDIEN AG

Myoelectricity collecting device

The embodiment of the invention discloses a myoelectricity collecting device, which comprises an elastic base body, outer electrodes, inner electrodes and electrode insertion pins, wherein conductive fabric electrode cloth in contact with the human body surface is arranged on each inner electrode, each outer electrode is arranged on the outer surface of the elastic base body, each inner electrode is arranged on the inner surface of the elastic base body, each outer electrode is connected with one corresponding inner electrode, one end of each electrode insertion pin is connected with one corresponding outer electrode, and the other end of each electrode insertion pin is connected with myoelectricity monitoring equipment. The embodiment of the invention is adopted, before the collection operation of myoelectricity signals, the electrode insertion pins are inserted into the outer electrodes, the myoelectricity collecting device of the inserted electrode insertion pins is worn in positions requiring the myoelectricity signal collection, the myoelectricity signal collection can be realized, the experiment preparation time is short, the operation is simple, the work efficiency of the myoelectricity signal collection is improved, and in addition, the conductive fabric electrode cloth is in contact with the human body surface, so the comfort degree of an subject is improved.
Owner:SHENZHEN INST OF ADVANCED TECH

Real-time monitoring device and method for freezing-thawing damage of rock

The invention belongs to the field of rock engineering and in particular discloses a real-time monitoring device and method for freezing-thawing damage of rock. The detection device comprises a left device and a right device, wherein the left device and the right device are connected with each other through bolts and nuts; each device consists of a containing slot and a fixing device; an electrode insertion hole is formed in each fixing device; the electrode insertion holes are connected with metal meshes through metal wires; the metal meshes are arranged at the end parts of mounting holes; the mounting holes are formed in the fixing devices; the electrode insertion holes are connected with wires through electrode insertion pins; two ends of a test sample are arranged in the mounting holes; a rubber film covers the test sample. The method comprises the following steps of: preparing the test sample, filling water, arranging the test sample, putting the test sample into a freeze tester for a freeze test, measuring an alternating current impedance spectroscopy, and analyzing a change rule of the freezing-thawing damage of the rock. According to the device and the method, on the basis that an inner microstructure of the rock test sample is not damaged, the freezing-thawing damage characteristic of the rock is tested; furthermore, in the freezing-thawing test process, the freezing-thawing damage measurement can be realized.
Owner:ZHONGYUAN ENGINEERING COLLEGE

Multi-electrode insertion type electromagnetic flowmeter sensor

The invention relates to a multi-electrode plug-in electromagnetic flowmeter sensor, comprising an insulation measuring rod inserted in the fluid with an average flow velocity V; a spiral coil is arranged in the insulation measuring rod; a magnetic field B is generated in the spiral coil under the excitation current I; a pair of bottom electrodes are arranged at the bottom of the insulation measuring rod; the straight line formed by the two points of the bottom electrodes, the average flow velocity V and the magnetic field B are mutually cut; a pair of lateral electrodes are arranged on one lateral magnetic surface of the insulation measuring rod; the lateral magnetic surface is the place where the magnetic field B of the spiral coil and the average flow velocity V form orthogonal cutting on the lateral side of the insulation measuring rod; at the same time, the straight line formed by the two points of the lateral electrodes, the average flow velocity V and the magnetic field B of the spiral coil are mutually cut. The sensor makes use of the lateral magnetic filed of the spiral coil on the lateral side of the insulation measuring rod to arrange new lateral electrodes on the lateral side of the insulation measuring rod, so that the lateral electrodes can form an electromagnetic flow measuring relation to the new flow velocity points under the lateral magnetic field of the spiral coil; therefore, the traditional bottom electrodes and the new lateral electrodes form the plug-in electromagnetic flowmeter sensor which can measure multi-point velocity. The invention overcomes the measurement error caused by velocity distribution and flow state changes and fundamentally improves the accuracy of plug-in electromagnetic flowmeters.
Owner:SHANGHAI UNIV

Film layer structure, manufacturing method thereof and filter comprising film layer structure

The invention belongs to the technical field of film bulk acoustic wave filter processes, and particularly provides a film layer structure, a manufacturing method thereof and a filter comprising the film layer structure. The film layer structure comprises a substrate, a cavity is formed in the top of the substrate, a composite upper electrode and a composite lower electrode are prepared above thesubstrate, and a piezoelectric layer is arranged between the composite upper electrode and the composite lower electrode; wherein the composite upper electrode comprises an upper electrode, a first temperature compensation layer and an upper electrode insertion layer which are arranged from top to bottom; and the composite lower electrode comprises a lower electrode insertion layer, a second temperature compensation layer and a lower electrode which are arranged from top to bottom. Through the film layer structure provided by the invention, the C-axis preferred orientation growth of the piezoelectric film is facilitated, the piezoelectric film with good orientation and complete crystal grain growth is obtained, and in addition, a filter adopting the film layer structure can be ensured to have relatively low insertion loss and keep bandwidth stable.
Owner:CHINA ELECTRONICS TECH GRP NO 26 RES INST

External pressure-balance type Ag/AgCl reference electrode and preparation method thereof

ActiveCN104764783AEasy to control the lengthAvoid the problem that the working temperature is difficult to exceed 300°CMaterial electrochemical variablesElectrode insertionPressure balance
The invention discloses an external pressure-balance type Ag/AgCl reference electrode and a preparation method thereof. A porous ceramic pillar is located at the bottom of a cavity of a pressure cavity body and connected with the inner wall of the lower part of the cavity of the pressure cavity body by a first O-shaped sealing ring, the upper end face of the pressure cavity body is in close contact with a compression ring by an external nut, the lower end of the compression ring is provided with a taper hole, a circular-truncated-cone-shaped sealing element is arranged in the taper hole, an Ag/AgCl wire electrode is inserted in an internal reference substance in the pressure cavity body until extending to the upper end face of the porous ceramic pillar, and an electrode lead is led out through an axial through hole in the circular-truncated-cone-shaped sealing element located in the taper hole at the lower end of the compression ring and an axial through hole in the compression ring. According to the invention, a problem that various existing Ag/AgCl reference electrodes are inapplicable to high-temperature and high-pressure hydrothermal systems at a temperature and pressure range of 400-700 DEG C and 40-100 MPa can be solved, and a problem that samples are polluted and streaming potentials and use occasions are limited can be solved.
Owner:INST OF GEOCHEM CHINESE ACADEMY OF SCI

Gallium nitride power device with multi-field plate structure, and preparation method thereof

The invention discloses a gallium nitride power device with a multi-field plate structure. The gallium nitride power device is sequentially provided with a substrate, a nucleating layer, a buffer layer, a first insertion layer, a first GaN layer, a second insertion layer, a second GaN layer, an AlGaN barrier layer, a passivation layer, a grid electrode field plate, a drain electrode field plate, aprotective layer, a grid electrode insertion layer, a p-type GaN grid electrode, a grid electrode metal, a source electrode metal and a drain electrode metal from bottom to top, wherein the passivation layer located on the surface of the AlGaN barrier layer is in a strip shape arranged at intervals, the grid electrode field plate and the drain electrode field plate respectively cover part of thepassivation layer, and the surfaces of the grid electrode field plate and the drain electrode field plate and the space between the grid electrode field plate and the drain electrode field plate are covered with the protective layer. According to the invention, the electric field distribution is uniform, the voltage endurance capability of the device is enhanced, the stability of grid electrode turn-on voltage and grid electrode voltage of the device is effectively improved, and the electric leakage of the device under the action of large current is effectively reduced. The preparation methodis completely compatible with a traditional process, and the preparation difficulty is low.
Owner:CHANGSHU INSTITUTE OF TECHNOLOGY

Flexible LED lamp strip capable of being flexibly powered

The invention provides a flexible LED lamp strip capable of being flexibly powered. The flexible LED lamp strip comprises a flexible lamp strip body, an end cover assembly and a conductive connector.A flexible lamp plate and two embedded main wires are arranged in the flexible lamp strip body. The end cover assembly comprises an end cover PCB, an electrode pin, an electrode insertion piece and anend cover shell wrapping the outer side of the end cover PCB through injection molding. The electrode insertion piece and the electrode pin are communicated through a circuit on the end cover PCB. When the end cover assembly is inserted in the flexible lamp belt body, the electrode insertion piece and an electrode contact of the flexible lamp plate are electrically connected, the electrode pin and the main wires are electrically connected, and a parallel circuit is formed in the flexible lamp strip body. Two conductive screws are arranged on the conductive connector. The conductive connectoris installed at any position of the outer side of the flexible lamp strip body through the two conductive screws. The tip parts of the two conductive screws are in contact conduction with the main wires. The wired powering of any place of the flexible LED lamp strip is realized, installation and use are convenient, and the flexible LED lamp strip has the advantages of being rapid in connection andsafe and reliable in electrical connection.
Owner:郑登刚
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