483results 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 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).

A system processes an audio signal and a video signal by using different devices, thereby preventing a so-called lip sync error. The processing time (represented by processing-time information) from the start of reception of a supplied video signal in a video processor apparatus to the start of displaying a video corresponding to the video signal on a display screen of a display device is acquired in an amplifier device from the video processor apparatus through a control signal line. In accordance with the acquired processing time, a delay processor delays processing of an audio signal supplied from the delay processor.

The invention discloses image segmentation method and device, and a method for judging image inversion and distinguishing the front side and the back side of a sternum. The image segmentation method comprises the following steps of: a. preprocessing the input image; b. searching the outline of the target area, and checking the search result of the outline, wherein the process for checking the search result of the outline comprises the following steps of: judging whether the shape abnormity index of the target area in the outline search process is less than or equal to a preset threshold value; if so, accepting the result of the search process; and if not, rejecting the result of the search process; and c. extracting the target area according to the check result. By increasing the check procedure, the invention can enable a user to reasonably distinguish the input image, thereby solving the problem that the image abnormity affects the segmentation.

The invention provides a detection device of subsurface defect of an optical element with little measurement error and a method thereof. The detection device of the subsurface defect of the optical element comprises a microscope, a precise displacement platform and an image data processing unit connected with the microscope, wherein thethe image data processing unit is further connected with a laser displacement sensor which is used for measuring the movement amount of the precise displacement platform in the direction Z. In the invention, the optical microscope and the laser displacement sensor are adopted for measuring the subsurface detect, the subsurface defect depth and the appearances of the subsurface detect under different depths are obtained, and the observation of the appearances of the subsurface detect under different depths and the accurate depth measurement are realized, error resulting from the reposition of the traditional detection is avoided, and micron-level measurement precision is ensured. The invention is used for the detection of the subsurface defect of optical glass, and is suitable for the measurement of processing subsurface defect of ceramic, silicon, germanium and other engineering materials.

The invention relates to a remote automatic hydrology and water quality monitoring system platform, which belongs to the technical field of remote river, lake and reservoir hydrology and water quality environment monitoring and the field of automatic control. The platform comprises a hydrology sensor, a water quality sensor, a data collector, a solar power supply. a control system, a server, and a terminal device, wherein the data collector is respectively connected with the hydrology sensor and the water quality sensor; and the solar power supply is respectively connected with the data collector, the control system, the hydrology sensor and the water quality sensor. The platform is characterized by further comprising a GPS/Beidou positioning system for positioning a remotely-monitored position. The GPS/Beidou positioning system is connected with the data collector and the solar power supply. A destination can be marked on a backstage map, the system platform can intelligently control the system to move to a new displacement destination via the GPS/Beidou navigation module on the platform, the system has certain artificial intelligence, and the most proper line can be chosen from a specific line selection.

The invention is applicable to the technical field of three-dimensional measurement, and provides a method and a system for automatically acquiring complete three-dimensional data of an object surface. According to the system, a plurality of three-dimensional sensors are arranged along the one-dimensional direction for acquiring the three-dimensional depth data of the object surface; a tested object is placed on a transparent platform; and the transparent platform can drive the tested object to rotate, so that the sensors measure the bottom surface data of the object. According to the method and the system, high-accuracy calibration of a multi-sensor array without visual field overlapping is realized; automatic matching of a plurality of angle depth images is finished using calibration information by adopting a rotation angle presetting method according to the characteristic of high repeated rotation accuracy of a rotary table, so that the error caused by uncertainty of a rotating shaft is avoided and the rotating shaft is not required to be calibrated; and since the transparent platform is utilized, system can measure the bottom surface data of the object and can finally obtain the complete three-dimensional data of the surface of the tested object. In addition, the system can be used for measuring the instep of a human body.

Provided is a method and apparatus for setting a detour path in a wideband high frequency wireless system using a centralized Media Access Control (MAC) protocol. Here, in a wireless system using the centralized MAC protocol where a time synchronization and a band allocation may be performed by a single central control unit, when a signal blockage occurs while a data communication is being performed via a direct path between a source device and a destination device, the detour path may be quickly provided.

The invention relates to a method for positioning faults of a power distribution network based on the amplitude analysis of a three-phase current. The method comprises the steps of collecting the three-phase current of the power distribution network in real time, carrying out amplitude analysis on phase current of each phase before and after a single-phase earth fault once the single-phase earth fault occurs, carrying out deviation calculation by collecting phase currents with the same phase position at a starting moment so as to realize the amplitude calculation of a current phasor, simultaneously filtering the influences of load currents and interphase capacitance currents, and calculating a valid value of the change of each phase current. A monitoring device mounted at a certain point of a circuit can detect whether a detection point is located at a fault route by analyzing the change amount of the amplitude of the three-phase current. Based on the amplitude characteristics of the three-phase current after the single-phase earth fault occurs, a zero sequence current does not need to be synthesized, so that the analytical calculation quantity of a main station is reduced; and the method has relatively high practical values in the engineering.

An intelligent pharmacist robot comprises a body (100), two mechanical arms (200) and a controlling system (300); and each mechanical arm (200) is of a structure with at least six shafts. The robot further comprises a stereoscopic vision system (600) connected with the controlling system (300), and the stereoscopic vision system (600) comprises a first camera (610) arranged at the head portion of the body and a second camera (620) arranged on at least one grabbing clamp (260). By means of the technical scheme, the high-intelligent robot can finish medicine preparing work. Due to high intelligence and accuracy, the robot can be applied to working in dangerous occasions in the hospital or preparing medicine with higher requirements. Thus, errors caused by manual operation are avoided. In addition, a robot system can be formed by the robot through networking to finish the whole medicine preparing process.

The invention discloses a high-precision binocular camera calibration method, which is completed by using a pair of camera equipment and a calibration plate of a circular characteristic image, and comprises the following steps of: firstly, extracting control point image coordinates in the calibration plate to carry out camera primary calibration; Constructing a front view image of the calibrationboard by using the obtained camera parameters, solving control point image coordinates in the front view image by using a digital image correlation method, correcting the image coordinates in the calibration board, and performing camera calibration again; And finally, establishing a binocular camera overall optimization model according to the fixed position relationship between the cameras, and optimizing camera parameters. According to the calibration method provided by the invention, the coordinates of the control points in the calibration plate are accurately obtained, the optimization model of the calibration parameters of the stereo camera is simplified, and a high-precision calibration result can be obtained.

The invention discloses a wool fineness automatic measuring method, which comprises the following steps that instruments required for automatically measuring the wool fineness are prepared, and the instruments comprise an LED (light emitting diode) light source, a testing sample XY work table, an optical magnification system and a digital camera; light rays are irradiated to testing samples by the LED light source; through the optical magnification system, sample images are captured by a CCD (charge coupled device) camera; the sample images are sent to a computer processing system for measurement and calculation. The wool fineness automatic measuring method provided by the invention has the advantages that the manual intervention is not needed, manpower resources are reduced, and errors caused by subjective factors are avoided; simple and efficient processing links are adopted, the consumed time of the whole wool fineness automatic measuring process is shortened to be within 30ms, the original wool state is maintained to the maximum degree, and the damage to the geometric dimension of wool is avoided, so the basis is provided for guaranteeing measurement precision; during the diameter calculation, the condition that the wool edge is basically in a straight line state or an approximate straight line state is used as the basis for approximately solving the diameter by adopting an area method, so the measurement precision cannot be greatly influenced.

The invention discloses a vacuum plume aerodynamic force measuring system and method. The vacuum plume aerodynamic force measuring system comprises a vacuum chamber, an engine, a force measuring model, a plume protection cover, a displacement mechanism, a mounting base and a six-component balance force measuring system. According to the vacuum plume aerodynamic force measuring system and method, a small-range six-component balance is used as a force measuring element for directly measuring vacuum plume aerodynamic force, so that a measurement result is more accurate; according to the characteristics of high speed and high temperature of engine vacuum plumes, duralumin is used as a material for designing the force measuring model and the plume protection cover, so that the force measuring model and the six-component balance are prevented from being damaged; the displacement mechanism is used for driving the six-component balance and the force measuring model to scan a plume field, and aerodynamic force measurement can be conducted at multiple positions under multiple working conditions in one close-cabin experiment. The vacuum plume aerodynamic force measuring method comprises the following steps that the six-component balance is calibrated, a six-component balance working formula is calculated, experimental equipment is installed, the experiment is conducted, and data are processed.

The invention provides a Micro-CT (micro-computed tomography) based non-uniform Voxel grid discretization method for a three-dimensional braided composite material, relates to a non-uniform Voxel grid discretization method, and aims to solve the problems of mesostructure in-situ modeling and relatively difficult grid discretization of the three-dimensional braided composite material. The method comprises steps as follows: step one, binary images of gray-level sheet images are obtained; step two, a cross section shape of a fiber bundle is determined; step three, local coordinate information of the fiber bundle is obtained according to a fiber bundle path; step four, a direction of local coordinates at each cross section center point of the fiber bundle along the fiber bundle path is determined; step five, a geometric model of a mesostructure of the three-dimensional braided composite material is generated; step six, Voxel grids on the boundary of the fiber bundle and the boundary of a matrix are obtained; step seven, whether the new Voxel grids belong to the fiber bundle or the matrix is defined; step eight, the new Voxel grids are discretized into non-uniform Voxel grids. The method is applied to the field of finite element modeling of the three-dimensional braided composite material with a complicated braided structure.

A semiconductor memory device and an operating method of the semiconductor memory device change a read voltage used in a read operation by performing a moving read operation, a randomize operation, and a program/erase compensation operation independently or in combination, thereby stably performing the read operation without an error and reducing a time for the read operation even when distribution of threshold voltages of the memory cells is changed according to a program/erase cycling effect or a retention effect.

The invention relates to a splicing seam brightness compensation and adjustment method for a high-density LED display screen. The method comprises the following steps: conducting point-by-point consistency correction to obtain the first-correction color space conversion parameter matrixes of pixels; partitioning the pixels in a splicing seam area into a plurality of correction units; driving the correction units and benchmark units in modules to conduct display via real-time drive display data obtained after the first correction; conducting brightness consistency correction on the correction units by taking the brightness of the benchmark units as a benchmark to obtain the second-correction color space conversion parameter matrixes of the pixels in the correction units; and taking the Hadamard product of the first-correction color space conversion parameter matrix and the second-correction color space conversion parameter matrix of each pixel as the final color space conversion parameter matrix of the pixel, thus obtaining the final color space conversion parameter matrixes of the pixels in the correction units. The method provided by the invention can weaken the phenomena of uneven bright lines and dark lines caused by splicing seams among LED display modules, and improve the display effect of the display screen.

The invention relates to a prefabricated crack preparation device and method for a standard rock test piece. The preparation device mainly comprises a cutting system, a driving system and a tabletop system. The standard rock test piece is arranged in the test piece cutter of the tabletop system and the test piece cutter comprises a crack positioning semi-open steel mold and a cutting angle adjuster. The cutting system is used for crack cutting of rock pieces. The driving system provides driving force for the cutting system. The cutting system and the driving system are arranged on the tabletopsystem. According to the prefabricated crack preparation device and method for standard rock test piece, the preparation of the inclined crack and the through crack of the standard rock test piece surface can be realized, the geometrical dimension and the cutting speed of the crack can be adjusted, the structure is simple, the manufacturing process is simple, the degree of mechanization is high,and the crack is prepared accurately, and can be widely applied to joint fracture rock mechanics tests in the field of hydroelectric, transportation, energy and mine engineering.

The invention discloses a self-verification automatic test system, a device and a method for on-resistance. The system comprises program-controlled multi-channel selectors, a connecting cable, a self-verification component, a digital multimeter and a control module, wherein the program-controlled multi-channel selectors are used for controlling opening or closing of channels by turning on or off a switch; the connecting cable comprises an A end, a B end and a C end; the self-verification component is used for verifying the on-resistance of a tooling; the digital multimeter is used for sending a measured value of the on-resistance of the tooling and a measured value of the on-resistance of tested equipment to the control module; the digital multimeter is set in a four-wire resistance measurement mode by the control module; the control module controls the program-controlled multi-channel selectors to change the channels, starts testing the on-resistance of the tooling and receives the measured value of the on-resistance of the tooling sent by the digital multimeter; the control module controls the program-controlled multi-channel selectors to change the channels, starts testing the on-resistance of the tested equipment, and receives the measured value of the on-resistance of the tested equipment sent by the digital multimeter; and finally a true value of the on-resistance of the tested equipment is obtained.

The invention discloses a delay calibration method of a satellite navigation receiving set and relates to a full-link set delay calibration method of a time difference monitoring and time service receiving set based on the satellite navigation technology. The delay calibration method of the satellite navigation receiving set includes the following steps that firstly, a satellite navigation receiving set test link set undergoes delay calibration; secondly, the satellite navigation receiving set test link set is combined with the satellite navigation receiving set in a wireless mode and the total set delay is measured; thirdly, the delay of the satellite navigation receiving set is calculated. According to the delay calibration method of the satellite navigation receiving set, full-link wireless set delay calibration can be performed on the satellite navigation receiving set, the calibration precision is high and the advantages of being simple and practical are achieved.

The invention discloses an engineering machine operation target positioning method and system. The method comprises the following steps: (1) a reference station collects the satellite positioning information in real time as the current measured value D0, and then sends the D0 to a first moving station and a second moving station; (2) the first moving station and the second moving station individually collects the satellite positioning information in real time as the current measured value D1 and D2, and then a realtime dynamic differential treatment is carried out on between D0 and D1 and between D0 and D2 respectively so as to obtain the relative coordinate information of the first moving station and the second moving station; (3) a crane calculation unit determines the extend length, pitch angle, and rotation angle of a lifting arm according to the relative coordinate information of the first moving station and the second moving station; (4) finally the crane controls the lifting arm to move to the lifting position of an object to be lifted and lift the object according to the calculated extend length, pitch angle, and rotation angle of the lifting arm. The provided method and system can largely improve the precision of positioning on operation target, moreover the lifting arm is automatically traced, and the error and risk brought by eyeballing are avoided.

The invention discloses a computer pattern recognition technology for a microstructure of a composite material and a three-dimensional modeling method which are used for solving a problem that material components are difficult to be recognized and unstable in the prior art. The computer pattern recognition technology comprises the steps of acquiring a digital image of the internal structure of a 2.5D composite material by using an XCT technology; recognizing an independent base body portion by adopting a threshold segmentation method, and performing de-noising; respectively the left and the right of the independent base body region; pairing left and right base bodies by using the bilateral symmetry of the base bodies; for each group of paired base bodies, selecting appropriate upper and lower boundary points of the base bodies, and performing upper and lower boundary fitting, wherein an area between the upper and lower adjacent base bodies is a warp yarn area, and an area between the left and right paired base bodies with the base bodies being removed is a weft yarn area. The method disclosed by the invention can avoid manual intervention, and save a lot of manpower and time. Meanwhile, the invention further can build a three-dimensional model of the microstructure of the composite material so as to be used for further research and analysis.

The invention discloses a method for measuring the volume of steamed bread, which comprises the steps of placing the steamed bread into a water-tight thin film bag, sealing, vacuumizing, placing the steamed bread into a measuring container, and making up to a fixed volume with water, wherein the volume of the steamed bread is the difference between the fixed volume and the volume of the added water and a packaging material, and the scale value of the measuring container is corrected before the volume of the steamed bread is determined. With the adoption of the method, the prejudice that the steamed bread is not suitable for measuring the volume in the water is overcome, the defect that the result of the traditional rapeseed replacement method for measuring the volume of the steamed bread is low in accuracy can be further made up and the accuracy of volume measurement of the steamed bread can be greatly improved. The method is simple for operation, the price of the used measuring container is low, the whole process is sanitary and clean, the pollution to the steamed bread can be avoided, and the method has great practicability.

The invention relates to a wireless sensor network positioning method based on an unmanned autonomous aircraft, and the method comprises the steps: employing the unmanned autonomous aircraft to carry a directional antenna and a mobile anchor node for movement and beacon broadcast; enabling all sensor nodes to be distributed in a sensor arrangement region for receiving and processing a beacon signal; and calculating geographic information according to the positioning information corresponding to a maximum value point of at least three receiving signal intensities stored by each sensor node. There is no need to convert the receiving signal intensities into distances, thereby effectively avoiding errors caused by the conversion from the receiving signal intensities to distances. A wireless signal transmitted by the mobile anchor node in the air is better in linear sight distance communication environment, and the method can effectively prevent a barrier from causing a positioning error.

The invention discloses a calibrating method for a CCD (Charge Coupled Device) imaging lateral laser radar. The method comprises the following steps of: enabling an optical axis (1) of a CCD camera to be vertical to the plane of a calibration table (2), firstly acquiring a CCD image of the calibration table (2) by use of the CCD camera (3), and then calculating the offset angle (alpha) and angle width (d alpha) of each pixel according to a table number in the CCD image of the calibration table (2) and a pixel number with a same dimension as the table number increment in the table; and after placing the CCD camera (3) at the lateral adjacent part of an emitted light beam (5) of the laser radar, firstly determining the vertical distance(D) between the CCD camera (3) and the emitted light beam (5) of the laser radar by adopting a three-point positioning method, then substituting the offset angle (alpha) and angle width (d alpha) of each pixel as well as the vertical distance (D) between the CCD camera (3) and the emitted light beam (5) of the laser radar into a lateral laser radar equation P(alpha)=P0KA/D *TtTrbeta(alpha)dalpha, and performing inversion calculation by use of the offset angles (alpha), the angle widths (d alpha) and the vertical distance (D) so as to obtain atmospheric parameters. The calibrating method disclosed by the invention is high in measurement accuracy and wide in application range, and can be widely used for measuring the spatial distribution of atmospheric aerosol of a surface layer.

The invention discloses a compressor preheating control method and system, a storage medium and an air conditioner outdoor unit. The compressor preheating control method comprises the steps that the current environment temperature is detected, and whether the current environment temperature is lower than preset heating temperature or not is judged; when the current environment temperature is lowerthan the preset heating temperature, a winding resistance value of a current compressor is detected; the winding temperature of the current compressor is calculated according to the winding resistance value of the current compressor, preset standard temperature and a delivery resistance value; and when the winding temperature of the current compressor is lower than the preset heating temperature,heating currents are output to a compressor winding, the winding temperature of the current compressor continues to be calculated, and the heating currents stop being output till the winding temperature of the compressor is higher than target temperature. According to the compressor preheating control method, whether preheating needs to be conducted or not is judged by directly detecting the winding temperature in the compressor, therefore, monitoring errors of the external temperature are avoided, and more effective and more accurate compressor preheating control is achieved.

The invention provides a linear motion based antenna gain direction diagram measurement method. The measurement method includes: S1, determining far-field test conditions of a to-be-tested antenna; S2, allowing the to-be-tested antenna to be vertical to the central normal direction to plan a linear motion track; S3, placing a reference antenna at the endpoint of the linear motion track and allowing the central normal of the reference antenna to align to the to-be-tested antenna; S4, according to radio frequency power level received by the reference antenna, calculating equivalent power at the intersection point of a circle taking the to-be-tested antenna as the center and the far-field test distance as the radius and a connecting line of the reference antenna and the to-be-tested antenna; S5, controlling the reference antenna to displace continuously on the linear motion track, and calculating the equivalent power after each displacement, wherein the central normal aligns to the to-be-tested antenna after each displacement; S6, calculating transmitting power according to the equivalent power of the S4 and the S5 to obtain a transmitting gain direction diagram. The gain direction diagram can be measured through the linear motion of the reference antenna.

The invention relates to approximation layer replacing static correction method used to correct earthquake collected data in oil gas, coalfield etc. It replaces actual inhomogeneous medium by homogeneous medium close to surface structure, removes high frequency component effected superposition imaging, and keeps seismic wave field of earth surface observation to reduce the static correction influence to the minimum. It includes the following steps: collecting recorded earthquake data by general seismic prospecting; investigating and recording close earth surface structure and speed physical quantity by conventional method; calculating smooth earth surface altitude; calculating smooth low decelerating layer speed; peeling off and filling communication; finishing excursion imaging based on altitude surface and time depth conversion after section interpretation by conventional method. The invention can remove seismic wave unequal quantities time delay caused by inhomogeneous medium close to earth surface to satisfy the demand for earthquake data processing and interpretation.

The invention provides an automatic coal pile volume measurement method and an automatic coal pile volume measurement device. The method comprises the following steps: 1, setting a plurality of markers on a coal pile; 2, cruising the coal pile by a cruising car, wherein while moving, the cruising car scans every marker, a laser range finder on the cruising car acquires the distances S from the cruising car to the markers and pitch rotation angles Phi, a GPS sensor arranged on the cruising car provides a current horizontal rotation angle beta, the distance from the laser range finder to the ground is H, and the spatial coordinate of each marker can be obtained; processing the acquired spatial coordinates of all markers to form a three-dimensional figure of the coal pile; and calculating the volume of the coal pile according to the three-dimensional figure of the coal pile. The method and the special device can accurately measure the volume of the coal pile and are easy to implement.

The invention discloses an automatic production line apparatus for automatically immersing a chamber, immersing paint, vacuumizing and drying, relating to an automatic production line apparatus for automatically immersing the chamber, immersing paint, vacuumizing and drying. A liquid level window (2) is arranged outside a vacuum box (1), a vacuum box cover (22) is arranged between a discharge port (3) and a feeding port (5), an alignment wheel (25) is arranged at the inner side of the vacuum box cover (22), two lifting screw rods (23) are arranged above the outer side of the vacuum box cover (22) and parallel to each other, a hanging rack (41) is arranged above a push frame (16), an air-entraining steel (18) is arranged at the right side of the hanging rack (41), and an air-pulling steel (19) is arranged in the front of the air-entraining steel (18). The invention can avoid the fault in the production process, save the production time and improve the yield with low cost and high efficiency.

The invention discloses a liquid flow standard calibration device. The device adopts an overflow structure in a closed container to obtain stable liquid level on which stable high air pressure acts to enable a fluid source of the device to have the advantages of flow stability of a water tower and high Reynolds number of container pressure stabilizing method and to have less fabrication cost and occupied area than those of the water tower method; the device does not need a reverser, and avoids the error caused by unsymmetrical double direction switching process of the reverser; during the calibration, the opening and closing of a valve are not taken as the starting point and terminal point of timing, liquid flowing stays in stable state within timing section, and calibration error mainly depends on the measurement error of the volume or weight of liquid in a standard measuring container, therefore, compared with the calibration device using the reverser, the liquid flow standard calibration device has higher calibration precision.