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528results about How to "Avoid position" patented technology

Direct locating method based on external radiation source time delay and Doppler frequency

The invention discloses a direct locating method based on external radiation source time delay and Doppler frequency, and overcomes the problem of insufficient utilization of external radiation source direct wave signal information of the existing direct locating method. The direct locating method comprises the following steps that time synchronization of the dual-channel receiving systems of L observation stations is performed; the Fourier coefficient of the dual-channel receiving data of each station is calculated; each observation station transmits the acquired array signal frequency domain data to a central station; a Gaussian maximum likelihood function is constructed for the data of the conversion value frequency domain at the central station and an information matrix including echo time delay and Doppler and direct wave time delay information is extracted; a grid search scope is set and the maximum eigenvalue corresponding to the data information matrix on geographical grid points is calculated; and accurate locating of a target can be obtained by searching the coordinates corresponding to the maximum value within the grid scope. Compared with the conventional two-step locating algorithm, loss of locating information can be reduced and locating precision can be obviously enhanced.
Owner:THE PLA INFORMATION ENG UNIV

Direct positioning method based on external radiation source time delay and Doppler frequency

The invention discloses a direct positioning method based on outer radiation source time delay and Doppler frequency, which overcomes the problem that the prior art does not fully utilize the information of a direct wave signal of an external radiation source. The direct positioning method comprises steps of performing time synchronization on double-channel reception systems of L observation stations, calculating the Fourier coefficient of the data received by the double channels of each observation station, transmitting the obtained array signal frequency domain data to a center station by the observation station, constructing a gauss maximum likelihood function for the data of the conversion value frequency domain and extracting the information matrix containing the echo time delay, the Doppler and the direct wave time delay information. The accurate positioning of the object can be obtained through setting a grid searching scope, calculating the maximum characteristic value corresponding to the data information array on the geography grid and searching the coordinate corresponding to the maximum value in the range of the grid. Compared with the traditional two-step positioning algorithm, the invention reduces the loss of the positioning information, and the positioning accuracy is dramatically improved.
Owner:THE PLA INFORMATION ENG UNIV

Tapered embedded locating method for silicon-based ceramic core and aluminium-based ceramic shell

InactiveCN103317087ASolve positioning interferenceAvoid position changes along the lengthFoundry mouldsFoundry coresWaxPhase transition
The invention relates to a tapered embedded locating method for a silicon-based ceramic core and an aluminium-based ceramic shell. The method comprises requirements as follows: 1) locating grooves are designed on locating surfaces of the ceramic core, wherein when one groove is used, a quadrate-tapered groove is selected, and when two locating grooves are used, the two locating grooves are tapered grooves; 2) a wax member, in a wax mould design, is provided with locating holes corresponding to the locating grooves; and 3) a small-planar locating mode is selected for other assistant locating; a weak area, where blade exhausting slots are located, is provided with a free end; and the thickness of the free end is 0.1 mm-0.5 mm. The locating method provided by the invention is advantageous in that the ceramic core is stably located in the ceramic shell; enough space is provided for expansion and contraction when the ceramic core is subjected to high temperature phase transitions; metallurgical defects, which are caused by locating problems of silicon-based ceramic cores and aluminium-based ceramic shells, such as out-of-tolerance blade sizes, slant blades, leak blades, broken cores, and the like are prevented; operation is simple and reliable; additional cost is very low; and the product qualified rate increases from 20% to 90%.
Owner:SHENYANG LIMING AERO-ENGINE GROUP CORPORATION

Automatic disc placement device for winding machine

The invention relates to an automatic disc placement device for a winding machine. The device comprises a rack, an empty disc conveying mechanism, a full disc conveying mechanism, a mobile module, a material disc suction mechanism and a battery core suction mechanism. The empty disc conveying mechanism conveys multiple laminated empty discs in front of the rack to an empty disc placement working station in the rack, the material disc suction mechanism sucks the empty disc of the uppermost layer in the empty disc placement working station to a battery core installation working station of the full disc conveying mechanism in sequence, and battery cores are installed in the empty discs through the battery core suction mechanism. In cooperation with the winding machine, the Bluetooth and square battery cores can be quickly and automatically transferred into the discs, the automation degree is high, the application range is wide, manual operation is not needed, the efficiency is high, and the situation is avoided that the battery cores are damaged through a man-made mode and placed at the wrong positions; the processing and manufacturing cost and management cost are lowered, the enterprise revenue and market competitiveness are improved, the industry of lithium battery processing and manufacturing is promoted, and the good social benefit is achieved.
Owner:东莞泓宇智能装备有限公司

Basement bottom plate having advanced-waterstop post-cast strip structure

The invention provides a basement bottom plate having an advanced-waterstop post-cast strip structure. The basement bottom plate comprises various bases and various corresponding post-cast strips connected among the bases. Each post-cast strip comprises a concrete backing layer, a waterproof layer, a waterproof protective layer, an advanced-waterstop strip and a post-cast strip, wherein the advanced-waterstop strip comprises cast-in-situ concrete, a concrete cushion block, a lower filling component, a lower left reinforcement frame, a lower right reinforcement frame, a waterstop component, an upper filling component, an upper left reinforcement frame and an upper right reinforcement frame, the post-cast strip comprises main reinforcement, a reinforcement net, a steel plate net, a fine-mesh steel wire net, advanced-cast concrete and post-cast concrete, the waterstop component comprises a rubber waterstop belt, a flat iron sheet and fastening bolts, and each filling component comprises a filling plate, a formwork and a plastic cushion block. The advanced-waterstop post-cast strip structure overcomes defects that the rubber waterstop of the existing advanced-waterstop post-cast strip is easy to deviate and crack, the filing materials thereof are easy to deform and the like, and accordingly can prevent the basement bottom plate from water leakage and seepage.
Owner:CHANGZHOU NO 1 CONSTR GRP

Full-automatic grinding and cleaning machine and grinding and cleaning technology thereof

The invention discloses a full-automatic grinding and cleaning machine and a grinding and cleaning technology thereof. The full-automatic grinding and cleaning machine comprises a feeding part, a CF cleaning part, a TFT cleaning part, a two-fluid cleaning and drying part, and a discharging part, wherein the feeding part, the CF cleaning part, the TFT cleaning part, the two-fluid cleaning and drying part and the discharging part are sequentially arranged on a machine table in the flow direction of glass pieces; the to-be-cleaned glass pieces are sequentially transported from the feeding part tothe CF cleaning part, a CF surface is cleaned through the CF cleaning part, the TFR surface is cleaned through the TFT cleaning part, and the CF surface and the TFT surface are cleaned by the two-fluid cleaning and drying part simultaneously and then dried, and the dried glass pieces are discharged and exported through the discharging part. According to the full-automatic grinding and cleaning machine and the grinding and cleaning technology thereof, transmission of the small and micro-sized glass pieces is effectively realized, and the problems of positional displacement and motion interference of the glass pieces in the two-fluid cleaning and drying process are effectively avoided; and rotating, material splitting, and exporting of the glass pieces are realized through cooperation of adouble-glass transmission channel formed by a gap between adjacent conveying rollers in an upward extending mode and a discharging mechanical arm, the height of a brush can be controlled in real time,displacement of the glass pieces is avoided, and the cleaning efficiency of the brush and the real-time cleaning versatility of the brush are effectively improved.
Owner:SHENZHEN ETMADE AUTOMATION EQUIP

Positioning protection device for electrical pre-buried PVC line pipe coming out of ground

The invention discloses a positioning protection device for an electrical pre-buried PVC line pipe coming out of the ground, and the device comprises a horse stool, a pipe clamp, and a limiter. The pipe clamp is fixed on a plate low die through a positioning nail, and a horizontal support is disposed above a limiting hole of the limiter. Through the simple combination of the pipe clamp, the limiter, the horse stool and the horizontal support, the device can be suitable for the positioning protection of a cast-in-place slab and an on-beam bent-up line pope, and the position where the line pipeenters a wall can be flexibly adjusted through an adjustment nut on the limiter. The device is simple in structure, is convenient to manufacture, is simple and convenient in installation and disassembly, is high in installation precision of the line pipe, is stable and reliable in support, effectively solves the quality problems that the pipe arrangement at a part where a PVC pipe comes out of theground, a protection layer is not sufficient, the entering positions on the wall are staggered and a pipe mouth is blocked, fundamentally guarantees the hidden laying quality of an electrical pipe, guarantees that the construction precision meets the standard requirements, improves the work efficiency, saves manpower and auxiliary materials, reduces the engineering cost, can be repeatedly used, and is high in popularization value.
Owner:中铁十六局集团城市建设发展有限公司 +1

Augmented reality navigation method based on indoor natural scene image deep learning

The invention discloses an augmented reality navigation method based on indoor natural scene image deep learning. The method comprises the steps of firstly scanning an indoor natural scene through a three-dimensional laser scanner to extract three-dimensional scene feature recognition points, then calculating an internal reference matrix of a smart phone camera, collecting an indoor natural sceneimage through a smart phone to extract two-dimensional image feature recognition points, and establishing an indoor natural scene topological network structure chart through an indoor planar map; binding and mapping the two-dimensional image feature recognition points, the three-dimensional scene feature recognition points and the topological network path nodes through specific descriptors; carrying out deep learning-based image classification on the indoor natural scene images acquired by the smart phone, and segmenting the indoor natural scene into a plurality of sub-scenes; and then tracking and recovering the three-dimensional scene feature recognition points by using an optical flow tracking algorithm, further synthesizing a three-dimensional registration matrix required by scene registration, and finally finishing virtual navigation object real scene registration and finishing indoor natural scene path navigation.
Owner:LUDONG UNIVERSITY
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