3results about How to "Does not affect navigation" patented technology

This invention relates to an integrated demolition and construction method for rebuilding a suspension bridge on the same site after demolishing an old rigid frame bridge. The method involves first demolishing the old bridge, then constructing the anchorages, main towers, and side spans of the new suspension bridge, installing the main cables and cable-mounted cranes, and using the cable-mounted cranes to dismantle the closure section of the middle span, the side spans, and the cantilever of the main beam of the middle span of the old bridge, and hoisting the steel box girder of the new suspension bridge. Simultaneously, crawler cranes are used to sequentially dismantle the closure section of the side spans, the cast-in-place section of the side spans, and the side piers of the old bridge. This invention allows for overlapping and simultaneous demolition and construction, which helps shorten the construction period. Utilizing the old bridge deck as a traction platform for the pilot cable of the new suspension bridge across the river does not affect navigation and saves costs. Using the cable-mounted cranes from the new suspension bridge construction for demolition ensures high construction efficiency and safety.

The utility model belongs to the field of fire rescue, and provides a portable boat lighting system which comprises a front lamp holder, a plurality of side lamp holders and a tail lamp holder, and through the arrangement of the front lamp holder, the side lamp holders and the tail lamp holder, a lighting lamp set can be fixedly used along with a boat and also can be detached to be worn and used by rescue workers. And the protection grade, the safety, the illumination intensity and the illumination time of the lamp are guaranteed. The side lamp holder is made of professional boat rubber repairing paste and does not need to be disassembled after rescue is completed at ordinary times. The front lamp holder is made of stainless steel and detachably connected with the lamp, and the lamp is easy to detach. And the boat tail lamp holder is fixed with the engine hood, so that boat navigation and rescue actions are not influenced. The whole set of lighting system is easy to install, and fixed use and carrying use are combined, so that the system is convenient to disassemble, charge, store and transport. The water area rescue device can effectively improve the multifunction and light weight of devices carried by firemen on a water area rescue site, save the preparation time of the rescue devices, and improve the rescue speed.

This invention provides a method for creating a point-beam data transmission mission for a shipborne mobile receiving station to remote sensing satellites. The method includes: using the acquired approximate position and orbital element information of the shipborne receiving station, calculating a set of all approximate visible time windows for the entire day; then using this set to determine the approximate time window for the target data transmission mission; based on the approximate time window, sequentially calculating the ship's geocentric latitude, ship's travel distance, and spherical arc length; determining, based on the spherical arc length, whether the ship's course change exceeds a preset threshold; if so, performing segmented ship position prediction; otherwise, performing direct ship position prediction to obtain a precise predicted ship position; expanding the approximate time window based on the precise predicted ship position to obtain a precise time window; and then using the precise time window and the precise predicted ship position to construct the point-beam data transmission mission. This invention achieves precise planning of the satellite data transmission mission and ensures that the shipborne station antenna points towards the satellite to form a two-way closed link.