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1259results about How to "Guaranteed accuracy" patented technology

AUV (autonomous underwater vehicle) interactive auxiliary positioning system and AUV interactive auxiliary positioning method based on SINS (strapdown inertial navigation system)/LBL (long base line)

ActiveCN104316045ASolve the problem of long-term error accumulationGuaranteed accuracy
The invention provides an AUV (autonomous underwater vehicle) interactive auxiliary positioning system and an AUV interactive auxiliary positioning method based on an SINS (strapdown inertial navigation system)/LBL (long base line). The positioning system includes the SINS mounted on an AUV, an LBL underwater sound positioning system laid on the seabed, and a data processing unit, wherein the LBL underwater sound positioning system includes hydrophones laid on the seabed at four known positions; the data processing unit includes a generalized cross correlation computing module, a correlation peak screening module, a position calculating module, a delay inequality calculating module, and a Kalman filter module; the SINS includes an IMU (inertial measurement unit) element and an IMU processing unit. According to the invention, the problem of long-time error accumulation of the SINS is solved, compensates positioning errors caused by multipath acoustical signal propagation in water are compensated, the long-time autonomous underwater positioning and navigation precisions of the AUV are ensured, and application of a GPS (global position system) and other radio positioning systems is avoided, so as to solve the problem that the AUV needs to rise to the water surface to correct errors during underwater operation, save time and energy consumption of underwater operation, and improve the underwater operation efficiency of the AUV.
Owner:SOUTHEAST UNIV

Abrasive belt grinding device applicable to inner and outer cambered surfaces of blades of aerospace blisk

The invention discloses an abrasive belt grinding device applicable to inner and outer cambered surfaces of blades of aerospace blisk. An X axis transverse feed mechanism, a Y axis transverse feed mechanism and a Z axis longitudinal feed mechanism form a grinding head feed mechanism; an A axis deflection motor, an A axis deflection bracket, a B axis motor, a gear train bracket, a C axis motor, a C axis revolving bracket and the like form a position adjusting mechanism of the grinding head. The abrasive belt grinding device provided by the invention guarantees rigidity of a grinding head mechanism and a work piece clamping mechanism through rational distribution of the grinding head feeding, the position adjustment of the grinding head and the position and angle adjustment of the work piece and through combination of space in six degrees of freedom by a short transmission chain; a contact wheel and an abrasive belt can cut into a narrow gap between two blades of the blisk, so as to ensure the contact between the contact wheel and the work piece to be stable when the contact wheel rotates at a high speed; so that the abrasive belt grinding device can improve the work efficiency, and meanwhile, dimensional accuracy of complex cambered surface of the work piece in processing can be guaranteed, the quality of the molded surface is ensured, the rate of qualified products is improved, the labor intensity of workers is reduced and the management and production costs are lowered.
Owner:CHONGQING UNIV +1

Method for determination of thermal conductivity and thermal diffusivity of anisotropic materials

ActiveCN102279204AGuaranteed accuracy
The invention discloses a detection method for thermal conductivity and thermal diffusivity of an anisotropic material, which adopts signal frequency domain characteristics to detect the thermal conductivity and the thermal diffusivity of the anisotropic material by using a harmonic detection technology. According to the method, micro metal detectors with a certain sizes and shapes are arranged on a surface of an sample in different directions; the micro metal detectors are simultaneously adopted as temperature sensors; with adopting alternating current heating, three harmonic waves and fundamental waves of the micro metal detectors are detected through a lock-in amplifying technology; the thermal conductivities and the thermal diffusivities of the anisotropic material in different directions are determined according to a relation between the frequency response characteristics of the micro metal detectors and the temperature changes of the micro metal detectors. According to the present invention, with adopting the harmonic detection principle and the data treatment method, the thermal conductivities and the thermal diffusivities of the anisotropic material in the directions of x,y and z can be obtained according to the width and the arrangement localities of the micro metal detectors.
Owner:INST OF ENGINEERING THERMOPHYSICS - CHINESE ACAD OF SCI

Inland river water area abnormal behavior ship automatic identification system and method

The invention discloses an inland river water area abnormal behavior ship automatic identification system and method; the method comprises the following steps: obtaining inland river water area ship navigation AIS message information, hydrology meteorology department environment information, CCTV video images and depth of field images in real time; parsing ship abnormal behavior mode types, and building a ship abnormal behavior sample database; building a depth learning network model to parse ship behaviors, thus obtaining ship abnormal behavior mode and GPS positioning information; detecting the ship in the CCTV video image, using the depth of field image to obtain the ship three dimension space information, and thus obtaining the ship video positioning information; fusing the GPS positioning information, the video positioning information, the ship abnormal behavior mode and ship detected characteristics, carrying out ship target association, and automatically identifying the abnormal behavior ship in the CCTV video. The method and system can effectively solve the problems that the abnormal behavior ship cannot be easily identified in the CCTV video; the method and system are high in identification rate, can provide safety warning for waterborne traffic, thus further improving the maritime affair supervision intelligent level.
Owner:WUHAN UNIV OF TECH

Pericardium thoracic cavity puncture and hydrops drainage device for cardiology department

The invention discloses a pericardium thoracic cavity puncture and hydrops drainage device for cardiology department. The pericardium thoracocentesis and hydrops drainage device comprises a positioning fixing device, a movable puncture device, a negative-pressure drainage device, a medicine feeding device, a controller and a bracket; a puncture assembly is fixed and positioned through a fixing clamp and an arc-shaped angle ruler; an infrared generator is used for guiding medical personnel to adjust the angle, so that the puncture accuracy is guaranteed; the controller is indirectly manipulated through a wireless remote controller and doctors can more conveniently operate; in a drainage process, once if a puncture needle enters a pericardium, a driving button can be turned off; a rebound device is composed of a first rubber block, a second rubber block, damping springs and ear stopping blocks, and is used for rapidly rebounding, so that danger of puncturing the heart by a needle core is avoided; hydrops in a drainage pipe can be rapidly cleaned by arranging a cleaning pipe valve, and the hydrops is prevented from reflowing in an infusion process. Totally, the pericardium thoracic cavity puncture and hydrops drainage device is accurate in positioning and simple in operation; time and labor are saved and the working load of the medical personnel is greatly alleviated.
Owner:孙军红

Concrete cracking overall process testing device based on true environment

The invention provides a concrete cracking overall process testing device based on a true environment. The device comprises a base, wherein an environmental box, a concrete sample containing device, a true environment simulation system and a loading system are arranged on the base; the environmental box is isolated from the surroundings; the concrete sample containing device is arranged in the environmental box and comprises a fixed chuck, a movable chuck and a sample middle fixed side formwork, the fixed chuck, the movable chuck and the sample middle fixed side formwork are spliced to form a concrete sample containing space, the fixed chuck is fixedly arranged in the environmental box, and the movable chuck is movably arranged; the environmental box and the concrete sample containing space are provided with temperature sensors; the true environment simulation system at least comprises a temperature regulation device which is arranged in the environmental box and the concrete sample containing device to simulate the set true environment at temperature; the loading system enables the movable chuck to be fixed or move in the axis direction, and a displacement/deformation sensor is arranged on the movable chuck to sense deformation of a concrete sample; a stress sensor is arranged to sense the load borne by the sample. The device can be used for testing the whole process of development of temperature, stress and other factors of concrete in a changeable environment from the test angle.
Owner:CHINA INST OF WATER RESOURCES & HYDROPOWER RES

Device for realizing high-speed real-time communication by optical fibers based on FPGA (Field Programmable Gate Array)

InactiveCN103825696AGuaranteed accuracySynchronize the system
The invention discloses a device for realizing high-speed real-time communication by optical fibers based on an FPGA (Field Programmable Gate Array). The device comprises an application layer, a transmission layer and a physical layer, wherein the transmission layer comprises an FPGA kernel control module which is composed of a sending end and a receiving end; the sending end comprises a first storage module for receiving and caching data of the application layer, a sending end controller for synchronously and cyclically accomplishing the framing sending of data according to the application layer, and an encoding module for encoding data and sending the encoded data to the physical layer. The receiving end comprises a decoding module, a receiving end controller and a second storage module, wherein the decoding module is used for receiving data from the physical layer and decoding the data; the receiving end controller is used for accomplishing the de-framing reception of data, takes a clock recovered from a 10-bit serial data stream received from the physical layer as a receiving end work clock, and adjusts the phase of the receiving end work clock in a synchronous character center aligning way so as to ensure the synchronous real-time transmission of sending end data and receiving end data; and the second storage module is used for receiving and caching data and sending the data to the application layer. The device can meet the requirement of an optical fiber high-speed communication system on high-speed real-time data transmission.
Owner:HUAZHONG UNIV OF SCI & TECH

Preparation method of gum

ActiveCN102876251AGuaranteed accuracy
The invention provides a gum preparation method which has the advantages that the gum is punched in one step, the preparation method is simple, the cost is low and the size accuracy of the prepared gun is high. The gum preparation method comprises the following steps of: attaching a double-faced adhesive tape onto a release film B; tearing off the self-contained release paper of the double-faced adhesive tape and attaching the double-faced adhesive tape onto a release film A; attaching a protection film C onto the release film B; punching the film by using a molding cutting die, wherein the inner frame of the cutting die cuts off the release film A and the double-faced adhesive tape, the outer frame of the cutting die cuts off the release film A, the double-faced adhesive tape and the release film B, the release film A and the double-faced adhesive tape form a cutting mark with an inner frame and an outer frame, and the release film B form a cutting mark with an outer frame; pulling off the release film A in the inner frame and attaching a protection film E, wherein the protection film E covers an area in the outer frame of the release film A; and removing the double-faced adhesive tape inside the protection film E and the inner frame, and the release film A, the double-faced adhesive tape and the release film B outside the outer frame, and attaching a protection film D onto the release film A.
Owner:NANJING GRANDEUR TECH

Special fixture for processing inclined conical nozzle steam passage and method thereof

A special fixture for processing an inclined conical nozzle steam passage and a method thereof relate to a fixture for processing the inclined conical nozzle steam passage and a method thereof. The invention solves the problem that at present, no special fixture for processing the inclined conical nozzle steam passage exists, and when a tapered hole of the nozzle steam passage is processed, a drilling bit is difficult to be centered. An indexing plate of the special fixture is provided with twenty indexing through holes along the periphery direction; the center of a stepped through hole and the center of the indexing through holes are on one periphery; a spotting spindle is mounted on the indexing plate in a plug-in manner; the processing method is as follows: using a milling cutter with diameter of 13mm to feed from a P point so as to process a plane C which is vertical to the central line of the tapered hole to be processed; and stopping feeding when the milling cutter mills to a Q point, wherein the center of a hole pitch circle having diameter of 13mm and milled by the milling cutter is the core-bit of the drilling bit. The special fixture solves the problem that at present, nospecial fixture for processing the inclined conical nozzle steam passage exists; and the inclined conical hole of the nozzle stream passage processed by the method has high position accuracy.
Owner:HARBIN TURBINE

Roadside parking vehicle real-time acquisition management system and management method

According to the roadside parking vehicle real-time acquisition management system and management method provided by the invention, inspection equipment is adopted for inspection, a manual inspection mode is replaced, the inspection efficiency is improved, and the inspection cost is reduced; a vehicle tail license plate scanned and identified by a front camera and a vehicle head license plate scanned and identified by a rear camera in the acquisition subsystem are mutually verified, so that the accuracy of license plate information is ensured, and rapid snapshot of illegally parked vehicles isrealized; a core analysis module of the inspection subsystem compares the parking coordinates, obtained in real time, of the vehicle with the planned road parking coordinates collected by a GPS collection module, and rapidly judges whether the vehicle is located within the parking range or not; the network transmission module transmits the information of the vehicle to the management subsystem inreal time through the Internet, thereby achieving the reporting and charging of the standard parking information. The roadside parking vehicle real-time acquisition and management system is fast and safe in the whole process, realizes intellectualization, can monitor illegally parked vehicles, and can replace a manual inspection mode.
Owner:江西山水光电科技股份有限公司

Automatic rectangular tube feeding device

The invention discloses an automatic rectangular tube feeding device which comprises a rack, a feeding box, horizontal sorting platforms, at least two sets of material poking devices arranged on the rack, at least two sets of overturning mechanisms arranged on the rack and a horizontal conveying roller set arranged on the rack and used for longitudinally conveying rectangular tubes. Each material poking device set comprises a material poking lifting frame arranged on the rack in a vertically lifting mode. The material poking lifting frames are driven by a material poking lifting power device and arranged on horizontal material poking frames in a horizontally sliding mode. The horizontal material poking frames are driven by a horizontal material poking power device and provided with material poking rods. The overturning mechanisms comprise jacking rods, and the jacking rods are driven by an overturning lifting power device. The horizontal conveying roller set is arranged on the rack. By means of the automatic feeding device, automatic feeding of the rectangular tunes can be achieved, and the rectangular tubes are turned over and conveyed out according to the actual requirements, so that the rectangular tubes can be cut by a downstream process conveniently, rectangular tube cutting is more automated, and overall efficiency is higher.
Owner:SUZHOU KINKALTECK MACHINERY TECH
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