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Implantable medical electrical stimulation lead fixation method and apparatus

An implantable medical electrical lead particularly for stimulation of the sacral nerves comprises a lead body extending between a distal end and a proximal end, and the distal end having at least one electrode of an electrode array extending longitudinally from the distal end toward the proximal end. The lead body at its proximal end may be coupled to a pulse generator, additional intermediate wiring, or other stimulation device. A fixation mechanism is formed on or integrally with the lead body proximal to the electrode array that is adapted to be implanted in and engage subcutaneous tissue, particularly muscle tissue, to inhibit axial movement of the lead body and dislodgement of the stimulation electrodes. The fixation mechanism comprises a M tine elements arrayed in a tine element array along a segment of the lead proximal to the stimulation electrode array. Each tine element comprises at least N flexible, pliant, tines, each tine having a tine width and thickness and extending through a tine length from an attached tine end to a free tine end. The attached tine end is attached to the lead body from a tine attachment site and supports the tine extending outwardly of the lead body and proximally toward the lead proximal end. The M×N tines are adapted to be folded inward against the lead body when fitted into and constrained by the lumen of an introducer such that the tine free ends of more distal tines of more distal tine elements are urged toward or alongside the attached tine ends of the adjacent more proximal tines of more proximal tine elements, and the folded tines do not overlap one another.
Owner:MEDTRONIC INC +1

Implantable medical electrical stimulation lead fixation method and apparatus

An implantable medical electrical lead particularly for stimulation of the sacral nerves comprises a lead body extending between a distal end and a proximal end, and the distal end having at least one electrode of an electrode array extending longitudinally from the distal end toward the proximal end. The lead body at its proximal end may be coupled to a pulse generator, additional intermediate wiring, or other stimulation device. A fixation mechanism is formed on or integrally with the lead body proximal to the electrode array that is adapted to be implanted in and engage subcutaneous tissue, particularly muscle tissue, to inhibit axial movement of the lead body and dislodgement of the stimulation electrodes. The fixation mechanism comprises a M tine elements arrayed in a tine element array along a segment of the lead proximal to the stimulation electrode array. Each tine element comprises at least N flexible, pliant, tines, each tine having a tine width and thickness and extending through a tine length from an attached tine end to a free tine end. The attached tine end is attached to the lead body from a tine attachment site and supports the tine extending outwardly of the lead body and proximally toward the lead proximal end. The M×N tines are adapted to be folded inward against the lead body when fitted into and constrained by the lumen of an introducer such that the tine free ends of more distal tines of more distal tine elements are urged toward or alongside the attached tine ends of the adjacent more proximal tines of more proximal tine elements, and the folded tines do not overlap one another.
Owner:MEDTRONIC INC

Joist type cable arch bridge structure and its construction method

A truss-type cable arch bridge structure is provided, whose last quarter main arch ring is composed of a plurality of arch steel pipes of the inner injecting concrete or the steel pipe to form the concrete truss-type main arch ring. The steel pipe concrete column is tightly fixed on the lower node of the last quarter main arch ring, while the upper end of the steel pipe concrete column is tightly fixed on the node of the first quarter driveway beam. The two ends of the inclined dragline equipped with an adjustable anchor nip are respectively fixed on the upper node and the lower node of the steel pipe concrete column adjoint the upper node. The construction method is that, the inclined dragline with the adjustable anchor nip is used to hoist the concrete truss-type main arch ring of the first unit, the steel pipe concrete column and the driveway beam from the bridge abutment on the two banks, and combined together; then to hoist the second unit, and the like, till the arch bridge folds, concrete is poured into each arch steel pipe or the steel box spar frame from the lower end; after forming a bridge, the inclined dragline at each node is adjusted for uniform stress on the entire arch. The invention can exert the cooperating combination, complementary advantages of different materials for the high strength steel cable, the steels and concrete etc, which is applicable for large span building the bridge in the V-shape valley of the a mountainous area.
Owner:EAST CHINA JIAOTONG UNIVERSITY

Automatic classifying and identifying method for road line point cloud based on three-dimensional laser reflection strength

The invention relates to an automatic classifying and identifying method of a road line point cloud based on three-dimensional laser reflection strength. The automatic classifying and identifying method comprises the following operation steps of acquiring point cloud data by utilizing a laser scanner, and calculating an equation of a POS plane of each scanning circle according to the attitude and position information of a POS system in each scanning circle of the point cloud data; calculating included angles between the connecting lines of three-dimensional coordinate points and the centers of the POS planes and the POS planes in the scanning circles, comparing the included angles with an angle threshold, and primarily judging the points larger than the angle threshold as pavement points; recalculating the distances from the primarily judged pavement points to the POS planes, in which the points are located, of the scanning circles, taking the height H of the POS system during the mounting as a known value, comparing difference values between the calculated distance values and a height value H, and taking the points smaller than the threshold as the pavement points; counting the strength values of the secondarily judged pavement points, and judging the points with the strength values larger than the threshold value as the road lines. The automatic classifying and identifying method has the advantages of rapidness, high efficiency, repetition in checking and convenience in error detection.
Owner:WUHAN HI TARGET DIGITAL CLOUD TECH CO LTD

Multifunctional self-walking assembled LED (light emitting diode) triangular warning board

The invention discloses a multifunctional self-walking assembled LED (light emitting diode) triangular warning board which comprises a self-walking device and a hint device, wherein the self-walking device comprises a vehicle body and a remote controller; the hint device comprises a folding type triangular warning board body; the triangular warning board body comprises two warning board assemblies which are in bilateral symmetry; each of the warning board assemblies comprises three warning sheets connected with one another through pin shafts; the two warning board assemblies are opened to form a complete triangle; LED lamps and fluorescent cloth are arranged on the warning sheets; a flashlight is arranged at a vehicle head, and a tail lamp is arranged at a vehicle tail; a gyroscope is further mounted in a vehicle body. The multifunctional self-walking assembled LED triangular warning board has an automatic operating function; operation and stop of the vehicle body can be conveniently controlled by the remote controller; the triangular warning board has the advantages of convenience in collection, simplicity in assembling and high use efficiency; by the built-in arrangement of elements such as the gyroscope and a beidou, the triangular warning board has the functions of walking in the straight line, displaying the position and the like and has the characteristics of good pre-warning effect, convenience in mounting and moving, quickness in arrangement and safety guarantee.
Owner:黄明曦

A method for establishing a bridge BIM model by adopting Dynamo software

ActiveCN109766581ASolve the problem that the route cannot be determined for a long timeResolved issues with bridge works routes with interruptions in the middleSpecial data processing applicationsBridge engineeringBridge deck
The invention relates to a method for establishing a bridge BIM model by adopting Dynamo software, which belongs to the technical field of BIM models and mainly comprises the following steps of processing a pile foundation coordinate table provided by a design unit to obtain relative coordinates; reading the pile foundation coordinate table by adopting Dynamo to establish a bridge route; placing abridge pile foundation, a bearing platform, a tie beam, a pier column, a cover beam and a support according to the relation between each pile number and the central pile number coordinate table; adjusting elevation parameters of each component according to the data in the bridge pier feature elevation list in the drawing; placing a box girder, a wet joint, bridge deck pavement and a guardrail, and adopting the Dynamo software to complete the modification of elevation parameters of the box girder, the wet joint, the bridge deck pavement and the guardrail; and rapidly obtaining and restoring the relative coordinates of the pile foundation in Revit into real coordinates, and conducting the error comparison on the real coordinates and pile foundation XY coordinates provided in a constructiondrawing. The method can effectively solve the problem that a traditional method cannot determine a bridge engineering route which is long in route and interrupted in the middle.
Owner:CHINA HYDROPOWER ELEVENTH ENG BUREAU ZHENGZHOU CO LTD +1
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