130results about How to "Groundbreaking" patented technology

The invention discloses an on-orbit test method for space-borne sliding spotlight SAR aiming precision. The method comprises the following steps: choosing a ground control point whose absolute position coordinate is Ptarget0; according to the current orbital position of the satellite PSatellite0, forecasting the orbital position PSatellite1 (WGS84 coordinate system) of the control point at the covering time; performing calculations to the SAR imaging related parameters; based on the imaging parameters, calculating the relative position PRelative0 of the control point in an imaging band; covering by the satellite and irradiating to the known control point and downloading data; receiving the data by a ground application system and carrying high precision Doppler center computing and imaging processing; conducting geometrical positioning to the image by the ground application system based on the navigation data and the ephemeris parameters; intercepting the image according to the imaging bandwidth design value; and identifying the already known control point on the image; calculating the relative position coordinate PRelative1 in a scene. The invention can effectively solves the on-orbit test and evaluation on the space-borne sliding spotlight SAR aiming precision and can effectively ensure the accuracy for the user to obtain the SAR image of a required target.

The invention provides an imaging quality improving method of a high-resolution spaceborne SAR. The method comprises the following steps that 1) imaging quality improving demands are analyzed and imaging quality indexes are arranged on the basis of a high-resolution SAR image application; 2) optimized imaging quality indexes are decomposed and distributed; 3) measures for improving the imaging quality are provided; and 4) the imaging quality improving effect is evaluated on the basis of full-link simulation. The method provided by the invention is clear in processes and easy to realize, can guide general design of the spaceborne SAR, is innovative, and is suitable for imaging quality improving researches of other types of SAR satellites.

The invention discloses a binocular AR (Augmented Reality) head-mounted device information display method. On the premise of presetting mapping relations fc-s and fd-i in the head-mounted device, the position of a target object on an image photographed by a camera is acquired in real time through an image tracking method, the position is mapped to a screen coordinate system of the head-mounted device, and a left image / right image display position is calculated; and then, through a monocular vision distance measurement method, a camera imaging ratio is used for calculating the distance between the target object and the camera in real time, the distance between the left image and the right image is thus calculated, and the display position of an image at the other side is further calculated. Correspondingly, the invention also provides a binocular AR head-mounted device information display method and an augmented reality information display system. The method of the invention is high in reliability and low in cost. The traditional field depth adjustment starts from changing the image distance of an optical component, the traditional thinking is broken, the optical device structure is not changed, field depth adjustment is realized through calculating the left image / right image display position, creativity is realized, and compared with a method of changing an optical focal length, the method is more practical.

The invention relates to a production method of a multi-grain and color-varied PU film shell, which aims at forming grain on the surface of a plastic shell. Firstly, patterns are processed inside a die cavity of a die, but carving patterns in the die cavity is not only expensive but also difficult; in addition, some patterns can not be carved. The production method of the invention mainly select a PU, polyurethane film shell with demand grain and color, and the film shell is put inside a preset shaped thermoplastic die and is pressed into shell surface shape through the thermoplastic die, and then a PU molding body with the shell surface shape and surface patterns and color is moved to an ejecting molding die, fused plastic materials ejected are combined with the PU molding body, thus forming the shape of the die cavity. After being cooled and taken out, a colloid shell with surface pattern and color is obtained.

The invention relates to a drilling tool for a two-way soil-cement mixed pile. The drilling tool comprises an inner drilling rod, an outer drilling rod, an inner drilling bit and an outer drilling bit, wherein a water gas injection device is arranged at the upper part of the outer drilling rod, a cavity between the outer drilling rod and the inner drilling rod is set as a channel enabling water gas to descend, a water gas injection spray nozzle is arranged in the position of an outer drilling core pipe above a lower layer of mixing blades of the outer drilling head, the water gas injection spray nozzle is provided with a spray pipe which is arranged perpendicular to the outer drilling core pipe, spray ports are arranged at the two ends of the spray pipe, a valve cavity is arranged in the middle of the spray pipe, a floating spherical valve core is arranged in the valve cavity, and the middle of the valve cavity is connected with the outer drilling core pipe through a connecting pipe. When a pile is made of cement flour, the quality problem of the pile formed at the upper part due to low water content in a crust layer on the earth surface can be solved by water injection; when the pile is made of cement grout, the quality problem of the pile formed at the deep part due to the lack of dry curing at the deep part of the file can be solved by gas injection; the full pile length pile quality of the two-way soil-cement mixed pile can be ensured; and simultaneously, the drilling pipe is less prone to pipe blockage and can increase the mixing times of the cement flour or the cement grout which is sprayed out and greatly improve construction efficiency.

The invention discloses a simulation method for a base structure in a soil body and the movement visualization of the soil body under an earthquake action, and belongs to the field of rock and soil test mechanics. Moving and laser speckles of transparent soil and a model pile (6) in a transparent soil model box (7) positioned on a vibration table (3) under the irradiation of a fan-shaped laser generator (1) are shot by utilizing a high-speed digital camera (4), and the strain of movement of transparent soil particles is obtained through a computer processing system, so that the movement and the deformation of a pile foundation model are obtained.

The invention relates to a drilling process for deep hole machining for a hard material. A pre-drilling process is carried out at first, a pre-drilling bit is chosen to carry out pre-drilling on hole positions of a product, and during a pre-drilling process, tool setting is carried out at first, a pre-drilled hole with a depth of 0.5mm is machined for all the hole positions after the tool setting, foundations of the machined hole positions are moved by 0.5mm up and down after the operation is completed, the operation is repeated for many times, depths of 1-4mm, of the pre-drilled holes, are guaranteed, and pre-drilling operation is completed. The drilling process disclosed by the invention has the characteristics of avoiding breakage of the drilling bit, reducing a wear degree of the drilling bit and then lowering a production cost, omitting a wire wrapping process and then greatly increasing a machining speed of drilling, avoiding different hole diameters and then ensuring accuracy of the product, avoiding offset of the hole positions, and reducing consumption of the drilling bit and then prolonging the service life of the drilling bit, and the like.