11760results about How to "Avoid errors" patented technology

The present invention provides a system for surgery which includes an ultrasonic hand piece having a end-effector, a console having a digital signal processor (DSP) for controlling the hand piece, and a memory disposed in the end-effector. The generator console sends a drive current to drive the hand piece which imparts ultrasonic longitudinal movement to the blade. As the generator console reads the memory, the hand piece is authenticated for use with the generator console if a copyrighted data string is present in the memory. In a particular embodiment, the data string is an encrypted code, where the hand piece is authenticated for use with the console by decoding a corresponding encryption algorithm resident in the generator console and providing a responding data pattern.

A method for accurately positioning a patient for radiotherapy and/or radiosurgery, comprising the following steps: the patient is pre-positioned as accurately as possible with respect to a linear accelerator; at least two x-ray images of the patient and/or one of the parts of his body in the vicinity of the radiation target point are produced from different respective recording angles on a single image recorder; the x-ray image is spatially localized; at least one reconstructed image, corresponding to each x-ray image and deriving from a three-dimensional patient scan data set, is produced, the reconstructed images containing the desired image contents of the x-ray images when the patient is correctly positioned; and the real x-ray images are superimposed, and the positioning error is determined electronically and/or with computer guidance by way of particular landmarks and/or the intensity gradient or the contours in the two images; and the position of the patient is corrected by way of the determined positioning error.

A method for documentation of data for a vehicle, with the data being stored in a data memory (2) in the vehicle (1), the data in the data memory (2) being updated in the event of changes, and this data being transmitted via a wireless data transmission device (4) to a control center (5) outside the vehicle (1), in which case the control center (5), triggered by an initiation signal, passes on the data to a configuration documentation server (7), the data is stored in a database (6), in particular in a chronological sequence and broken down into products, in order to record the configuration standard outside the vehicle (1) for replacement of products on the vehicle (1).

The invention relates to a device for detecting a surface shape of an optical aspheric surface by a sub-aperture stitching interferometer, which comprises an interferometer, a transmission sphere, an adjusting mechanism, a numerical control device and a computer, wherein parallel light emitted by the interferometer is changed into a standard spherical wave through the transmission sphere; the computer controls the action of the adjusting mechanism by the numerical control device to adjust the relative position of the interferometer and an aspheric surface to be detected so that the standard spherical wave is incided to each sub-aperture of the detected optical aspheric surface sequentially and returns to the interferometer; and the computer extracts phase distribution data of each sub-aperture measured by the interferometer for analysis and processing, and the error distribution of the surface shape of a full aperture of the detected optical aspheric surface is obtained by a stitching algorithm. The device broadens horizontal and vertical dynamic range tested by the interferometer, can detect surface shapes of large-aperture concave and convex aspheric surfaces and an off-axis aspheric surface in high resolution and high precision without other auxiliary optical elements, and has low testing cost and short construction period.

The invention pertains to the technical field permanent magnet motors, and relates to a permanent magnet motor sliding mode control strategy. The permanent magnet motor is controlled by adopting double-closed speed current. The permanent magnet motor sliding mode control strategy is characterized in that a sliding mode speed controller and an extended sliding mode observer are adopted in the control strategy, the sliding mode speed controller adopts an exponential approach law containing the speed error and the sliding mode surface information, the deviation between a given rotating speed and a feedback rotating speed is taken as the input quantity, and a q-axis current given value is outputted through the sliding mode control quantity; the extended sliding mode observer is used to estimate the rotor position, the rotating speed and the load torque on a real-time basis, the rotating speed and the rotor position are used to provide the information of speed closed-loop control and coordinate transformation, and the load torque is compensated to the sliding mode speed controller, so that the high-accuracy vector control of the permanent magnet motor can be realized. The control strategy of the invention can be used to make the system fast track a given speed in the dynamic state, reduce the speed overshoot and the current fluctuation, and improve the disturbance resistance performance of the system.

A method for tracking device orientation on a portable device is disclosed. The method comprises initializing a device orientation to a sensor orientation, wherein the sensor orientation is based on information from an inertial measurement unit (IMU) sensor. It also comprises initiating visual tracking using a camera on the portable device and capturing a frame. Next, it comprises determining a plurality of visual features in the frame and matching the frame to a keyframe, wherein capture of the keyframe precedes capture of the frame. Subsequently, it comprises computing a rotation amount between the frame and the keyframe. Responsive to a determination that a rotational distance between the frame and the keyframe exceeds a predetermined threshold, promoting the frame to a keyframe status and adding it to a first orientation map and adjusting the frame with all prior captured keyframes.

The invention discloses an auto meter visual detecting system based on a computer, comprising a light source, a detecting box body, a camera connected with a PC control system, and an analog signal generator connected with the PC control system, wherein the analog signal generator comprises a frequency circuit and a resistance circuit and is used for receiving commands sent by the PC control system so as to generate frequency and a resistance signal needed by meter detection; the PC control system comprises an input module, a position adjusting module, a meter dial plate identification module,a communication setting module, a camera target capturing module and an output module which are respectively connected with a PC. The position adjusting module promotes two stepping motors in a camera position adjusting mechanism to run by sending serial port commands; and the communication setting module is used for realizing Ethernet communication setting and serial port communication setting.The camera comprises an image displaying module and an image processing module. The invention also discloses a detecting method of the detecting system.

The invention discloses a movement capturing method based on multiple binocular stereo vision. A movement video collecting device is constructed, and human movement video sequences from different orientations are collected by the movement video collecting device. Multiocular movement video sequences shot by a plurality of cameras are calibrated. Marked points matching and tracking of each binocular tracker is finished. Data fusion of three-dimensional tracking result of multiple binocular trackers is completed. The three-dimensional movement information of the marked points acquired by a multiocular fusion device is fed back to the binocular tracker to consummate binocular tracking. On the basis of binocular three-dimensional tracking realized by binocular vision, the invention fuses multiple groups of binocular three-dimensional movement data, resolves parameter acquiring problem of three-dimensional position, tracking, track fusion and the like for a plurality of marked points, increases number of traceable market points and enables the tracking effect to be comparable with three-dimensional movement acquiring device employing multi-infrared cameras for collecting.

The invention discloses a full automatic biochip detection system belonging to the clinical detection field of multi-marker biochips. The system adopts modular structure and comprises an automatic sample processing module, a reaction washing module, a detection module, a Tip head storage module, a reagent storage module, a biochip storage module, a sample storage module, a system base, an electric control box and a computer, the electric control box and all the modules are operated under the control of software, so as to realize the automatic sampling, the sample adding, the reaction, the washing, the detection and other processes. All the modules can work independently and can also be combined together and matched for work. The full automatic biochip detection system can overcome the shortcomings of the existing biochip detector and reduce the errors caused by human operation, and has stable and reliable detection result and good flexibility, so that the full automatic biochip detection system can not only greatly improve the detection efficiency, but also can be conductive to the accuracy of the detection result; the system has simple operation, therefore, the system is not only applicable to the scientific research and the applications of laboratories and hospitals, but also can be used for large-scale sample screening of large-scale hospitals and blood stations.

The invention discloses a detection method of bituminous mixture, including the following steps: digital image collection of bituminous mixture is completed; image processing of the acquired digital image is completed to obtain the content of compositions of the bituminous mixture. Moreover, the invention also discloses a detection system for the bituminous mixture. Both the method and the system can complete effective separation and extraction of bitumen, airgap, aggregate and aggregate particle of different particle diameter and realize direct determination and calculation of volumetric composition characteristic parameter of the bituminous mixture through converting the obtained characteristic parameter into volume ratio; moreover, the invention improves the mechanical property of the bituminous mixture and provides reliable basis for the scientificity in bituminous pavement engineering research.

The invention provides an image multifeature extraction and fusion method and the system, comprising the following steps of, extracting color features from an image to be matched, matching color with the target image, making sure the color similarity degree, if the color similarity degree exceeds the given color similarity degree threshold, entering the next step; extracting additional feature from the image to be matched, matching the auxiliary features with the target image, determining the auxiliary feature similarity degree, the auxiliary features comprise at least one of texture feature and shape feature; on the base of color similarity degree and auxiliary features similarity degree, making synthesis judgment and acquiring the synthesis similarity degree between the image to be matched and the target image, or matching the target image with the auxiliary features extracted from the matching zone of the image to be matched. The method and the system of the invention apply a cascade connected way to match from roughness to exactness, and can determine exactly the similarity zone of the target image and the image to be matched. The method and the system of the invention achieve a rapid and highly effective matching effect and save manpower and resources.

The invention discloses an automated instrument applied to nucleic acid extraction and continuous operation process of a mass spectrum sample application chip in biomass spectrometry analysis of a nucleic acid sample. The automated instrument comprises three main devices, namely, a nucleic acid extraction and purification device, a nucleic acid liquor relief distributing device and a mass spectrum chip sample application device, wherein nucleic acid in body fluid is extracted by using a magnetic bead method, a mechanical arm is utilized to complete a nucleic acid extraction action, the extracted nucleic acid is dispensed onto a sample board through a dispenser, a pipettor is used for transferring the sample board onto a chip sample application instrument, and the mass spectrum and relatedinformation of the nucleic acid are obtained through laser sampling of a mass spectrometer, so that the nucleic acid is analyzed rapidly, directly and continuously. The automated instrument is high-precision in controlling the volume of dispensed liquor, high-cleanliness in controlling the quality of the dispensed liquor and high-efficiency in meeting sample application requirements of large-batch samples; meanwhile, the samples are uniformly distributed under the control of a computer program, volume errors and possible foreign pollution caused by manual operation are avoided, and the speed and efficiency in sample application are increased at the same time.

The invention relates to a direct prestack time migration method for the seismic data acquired under the undulant ground surface. The method is applied to reflection seismic data processing during earthquake exploration and is a prestack migration imaging method aiming at the seismic data acquired under the undulant ground surface. The method can be directly applied to the seismic data which is acquired under the undulant ground surface and is acquired at shot points and demodulation points of different heights. Accordingly, the method can avoid errors caused by field static correction processing as well as correct the speed of a speed reducing belt in a migration process. The method can self-adaptively determine time-varying migration aperture and can correctly compensate geometric spreading effect of seismic waves during an imaging process so as to obtain an amplitude-preserved common reflection point gather. The core of the method is to use a one-way wave theory and a stable phase point principle to analyze so that the travel time and the amplitude of the seismic waves, which depend on the speed and thickness of the speed reducing belt, the heights of the shot points and the demodulation points, and stacking speed based on a floating datum plane, are obtained. The method has important application value for the explorations of oil, gas and mineral resources in areas with complex ground surfaces.

The invention discloses a building roof reconstruction method based on airborne LiDAR data. The method comprises the steps of 1, obtaining LiDAR point cloud data, and 2, processing the LiDAR point cloud data; the step 2 comprises the processes of 201, dividing building roof patches to obtain a plurality of roof patches from the building roof, 202, obtaining building roof point cloud data, 203, extracting outer contour points of the building roof and the roof patches, and meanwhile, extracting the outer boundary line of the building roof, 204, obtaining the vector boundaries of the roof patches, including establishing a search information set, carrying out neighborhood search, determining the types of the outer contour points and determining the vector boundaries, and 205, obtaining a vector model of the building roof, namely obtaining the vector model of the building roof after determining the vector boundaries of the plurality of roof patches. The method is simple in steps, reasonable in design and convenient to realize, good in using effect, and capable of completing the reconstruction processes of the building roof simply, conveniently and quickly with high quality.

The invention discloses a measurement testing bench which can measure three-direction rigidity of bogies of railway vehicles at the same time. A longitudinal or transverse rail wheel supporting base has the structure that an upper supporting plate is connected with a lower longitudinal or transverse movable platform by a load sensor; the longitudinal or transverse movable platform is internally provided with a cylinder roller which can be longitudinally rolled or transversely rolled by a bearing; two cylinder rollers are respectively arranged on a longitudinal or transverse convex beam of the base. During the testing, the rolling movement of the base and the movable platform is realized by the rolling of the cylinder rollers, with small friction force and smart movement. Parameters of vertical rigidity, longitudinal rigidity, transverse rigidity and geometrical structure of the bogies of the railway vehicles can be tested on the measurement testing bench which has the advantages of exact measurement value, high precision, simple structure, convenient operation and easy maintenance.

The invention discloses a tool setting device and a tool setting method for a micro lathe and belongs the technical field of mechanical automation. The device comprises a machine tool clamp plate, a tool rest, a tool, a guide rail, a first charge coupled device (CCD), a reflector, a first light source, a second CCD, a second light source and an outer computer. The method comprises the following steps of: calibrating pixels in the horizontal direction and pixels in the vertical direction respectively, and transmitting images containing actual distance information to the outer computer; monitoring and adjusting the tool to ensure that the tool approaches an end surface of a workpiece; displaying the distance between a tool nose and the rotary center of the end surface of the workpiece by a technology and software; manually adjusting the distance between the workpiece and the tool according to the obtained distances in the three directions, or controlling the relative motion of the tool and the workpiece by outputting corresponding signals through the computer so as to realize high-precision tool setting of the micro lathe. According to the device and the method, an image measurement technology is adopted, so that tool setting gaps can be automatically detected and can be measured in real time; and therefore, the tool setting difficulty is reduced, and the machining process can be well monitored.

The invention discloses a robot hand and eye calibrating method based on a scanner. The robot hand and eye calibrating method comprises the steps that a transformation matrix of an end tool coordinate system of a robot relative to a base coordinate system of the robot is established; a transformation matrix of a coordinate system of the scanner relative to the base coordinate system of the robot is established; and calibration of the positioning precision of the robot based on the scanner is completed by calculating the relation between the coordinate system of the scanner and the end tool coordinate system of the robot. By means of the robot hand and eye calibrating method based on the scanner, the calibration of the positioning precision of the robot based on the scanner is completed to calculate the fixed position relation of the scanner relative to the robot so that the scanner can then be used for scanning an end clamping tool of the robot to obtain the actual position of the end tool of the robot relative to the end coordinate system of the robot; errors generated due to inaccuracy of technical operation such as installation are eliminated so that the calibrated robot can precisely scan workpieces on different occasions, and the machining precision is improved.