198results about How to "Guaranteed corrective effect" patented technology

The invention relates to a method for tomographically displaying a cavity by optical coherence tomography (OCT) and to an OCT device, wherein the path length of a measuring light beam in the catheter can change as a result of a movement of the catheter and brings about a change in the display scale, wherein a possible change in the path length of the measuring light beam in the event of a movement of the catheter is electronically determined and automatically compensated.

The invention discloses a system and a method for on-site point-by-point calibration of the brightness and chrominance of the whole screen of an LED display screen. The system comprises LED display screen optical parameter acquisition equipment, display screen calibration parameter processing equipment, display screen signal input control and parameter transmission equipment and display screen calibration operation and screen control equipment. The method comprises the following steps: acquiring image data of information on original red, green and blue values of a single point in the lightened part of the LED display screen and values of actual brightness and colors when single colors of red, green, blue and while are displayed; and determining the calibration coefficients of the single point to realize calibration. The method acquires data by in a way of uniformly distributing the luminous points of the display screen in arrays which have the same point number and shape and alternately distributed at equal intervals, thereby avoiding clear horizontal and vertical patterns which use an acquisition area as a unit and are caused by the jump of regional edge calibration data when an original suborigin acquires data and interference among adjacent points caused by reduced pixel pitch and ensuring the calibration effect.

A method and apparatus is disclosed that determines the density of a material flowing through a Coriolis flow meter The density is used to infer the pressure of the flowing material. The inferred pressure may be used to correct for the secondary pressure effect in the Coriolis flow meter or may be reported to an external device.

A system, apparatus and method provide a means for indicating an overload condition has occurred during aircraft operation. The occurrence of an overload condition is automatically determined and an indication output thereof. Based on the indication received by the cockpit, avionics, maintenance, etc., further action may be taken to correct the effects of the overload condition on the tires and/or landing gear.

In a network having a first node and a second node, a method of verifying a lane routing between the first node and the second node. The first node and the second node operate according to a protocol in which: (1) a character is converted to code groups, (2) each code group has a corresponding lane, and (3) the code groups are communicated across the lanes in a parallel manner. A first set of code groups is transmitted from the first node. Preferably, the first set of code groups is different from a set of code groups predefined by the protocol. A second set of code groups is received at the second node. The second set of code groups corresponds to the first set of code groups. A determination is made whether the second set of code groups matches the first set of code groups. An identity of the first set of code groups can be preprogrammed within the second node. Preferably, the first set of code groups has a different code group in each lane. Optionally, the lane routing between the first node and the second node is corrected if the second set of code groups mismatches the first set of code groups.

The invention discloses a spacecraft attitude estimation method based on norm-constrained cubature Kalman filter. The method comprises the following steps: a state equation of a spacecraft navigation system is established; a non-linear measurement equation of the spacecraft navigation system is established; a discretized state equation and a discretized measurement equation are obtained; a norm-constrained cubature Kalman filtering algorithm is used for the discretized state equation and the discretized measurement equation, and an attitude of the spacecraft is outputted. The norm-constrained cubature Kalman filter is used, norm constraint of quaternion for describing the spacecraft attitude is introduced into the attitude estimation, so that the problem of singular covariance existed in the process of attitude estimation without considering norm constraint is effectively solved, the influences of norm constraint conditions of quaternion on the spacecraft attitude estimation are effectively corrected by only adding small computational complexity, precision of attitude estimation is improved, navigation precision of the spacecraft is furthermore improved, and stability of the navigation process is enhanced.

An optical proximity effect correcting method in a semiconductor manufacturing process includes adding, detecting, judging, and deleting. The adding includes adding a first correcting region around a portion of a first design pattern. The portion faces a second design pattern. A first corrected design pattern includes the first correcting region and the first design pattern. The detecting includes detecting a space between the first corrected design pattern and the second design pattern. The judging includes judging whether the space is smaller than or equal to a predetermined value. The deleting includes deleting at least a portion of the first correcting region such that the space is larger than the predetermined value, when the space is smaller than or equal to the predetermined value.

The invention discloses a method and device for detecting chlorophyll of a coastal zone water body in situ through a double optical path method. According to the method, the concentration of chlorophyll alpha is detected on line on the basis of a fluorescence method detection principle by directly measuring the fluorescence intensity; the device is composed of a light source module, a measuring module, a reference module and a signal processing module. Under excitation of an LED light source, the intensity of fluorescence emitted by the chlorophyll is measured, and the chlorophyll concentration of the coastal zone water body to be detected is calculated through a linearly dependent coefficient calculated by a system model and a compensation value for correcting yellow matter CDOM. The device can quickly detect the concentration of the chlorophyll in the water body on site in real time in a large area and is small in weight and size, convenient to carry, high in accuracy and sensitivity, easy to operate, low in cost and capable of being applied to multiple detection fields.

The invention discloses a method for withstanding false targets on the basis of a station's position error fusion algorithm, and mainly solves the problems that station's position error factors are not considered when false targets are withstand in the prior art, so that detection results are inaccurate. According to the scheme, the method comprises the following steps: 1, measuring a target by a node radar; 2, carrying out coordinates transformation on measured values to obtain the position information of the target in a uniform rectangular coordinate system; 3, calculating to obtain a positioning error covariance matrix of the target through the position information of the target in the uniform rectangular coordinate system; 4, matching the measured values by a nearest neighbor association method to obtain an associated measurement sequences; and 5, combining the measured values in all the associated measurement sequences in pairs, calculating the mahalanobis distance between each two measured values through the positioning error covariance matrix of the target, carrying out hypothesis testing on the mahalanobis distances, and getting rid of false targets to finish identification of real targets and false targets. By the method, the correct identification probability of the rear targets is improved, and therefore, the method can be used for detecting or tracking targets.

The invention provides a pneumatic optical effect corrector based on a self-illuminating wavefront sensor. The corrector comprises a self-illuminating wavefront measuring instrument, an image collector, and a processor. The self-illuminating wavefront measuring instrument is used to transmit a collimated laser beam, receives a distorted wavefront generated after diffusion light of the collimated laser beam diffused by atmospheric particles is subjected to optical effect, and extracts a deviation parameter of a distorted wavefront. The image collector is used to receive target light wave carrying an original image of a target region and perform image processing of image data of the original image to obtain a real image of the target region. The processor is used for deconvolution operation on the deviation parameter and the real image of the target region to obtain a reconstructed image of the target region. The corrector reconstructs a laser distortion source to effectively measure in real time the wavefront distortion caused by pneumatic optical effect, so that the precision and accuracy of wavefront distortion measurement are both high, and thus good correction effect and practicality of the system are further guaranteed.

The invention provides an inhomogeneous fast noise correction apparatus and correction method of a TDI CCD imaging system, and belongs to the field of remote sensing imaging. The problems of high cost, low efficiency and long time consumption of the existing correction system are solved. The correction apparatus comprises: TLK2711 receives image data output b the TDI CCD imaging system; an FPGA caches the image data and calculates an average gray response value of the image data and analyzes a correction parameter by using a real-time automatic normalization method; the correction parameter is sent by 1553B, RS422 or CAN to the TDI CCD imaging system, the TDI CCD imaging system shoots homogeneous light signals under the current correction parameter and feeds back the output data to the FPGA through the TLK2711 so as to realize the closed loop adjustment of the correction parameter; and a display terminal receives the corrected image data output by CAMERALINK output after. The inhomogeneous fast noise correction apparatus has the advantages of low cost, high efficiency, time saving and labor saving.

The invention provides a two-section-type righting electric pole correction device comprising a worktable, a first righting arm, a first jack pushing the first righting arm, a second righting arm and a second jack pushing the second righting arm. The bottom of the second righting arm is fixed on the worktable; the top of the second righting arm is rotationally connected with one end of the first righting arm, and the other end of the first righting arm abuts against an electric pole; the first jack is operated to push the first righting arm so as to achieve first-section righting of the electric pole; and the second jack is operated to push the second righting arm, and the second righting arm pushes the first righting arm to achieve second-section righting of the electric pole. The working stroke of the electric pole correction device is increased to remedy the defect of the short strokes of the jacks, and the application range of the electric pole correction device is widened; and by righting the electric pole for the two times, the accuracy of electric pole righting is improved, and the correction effect of the electric pole is guaranteed.

A spectroscopic method and spectroscopy system therefrom for analyzing samples. A sample includes a first chemical component that has a characteristic first absorption peak is provided. The sample is irradiated in a measurement waveband proximate to the first absorption peak, and at a first and a second reference waveband where the first chemical component lacks characteristic absorption features. Reflected or transmitted detection data is obtained including a measured power proximate to the first absorption peak and first and second reference powers at the reference wavebands. A plurality of different waveband ratios are evaluated using pairs of detection data to generate a plurality of measured waveband ratio values. A parameter of the first chemical component is then determined by evaluating a multidimensional polynomial calibration equation that relates the parameter of the first chemical component to the plurality of different waveband ratios by substituting the measured waveband ratio values into the calibration relation.

The invention relates to a weight detection device, in particular to an ice coating detection device for a cable. The ice coating detection device comprises a fiber grating wavelength modulator, an optical divider and a fiber grating weighing sensor, wherein the fiber grating wavelength modulator is connected with the optical divider through a signal transmission optical cable; the optical divider is connected with the fiber grating weighing sensor through a signal transmission optical cable; the upper end of the fiber grating weighing sensor is fixedly suspended, and the lower end of the fiber grating weighing sensor is connected with the cable; an elastic body is arranged in the middle of the fiber grating weighing sensor; the elastic body is provided with the fiber grating sensor; a broadband light source is arranged in the fiber grating wavelength modulator; the broadband light source is transmitted to the fiber grating sensor through a signal transmission optical cable; the fiber grating sensor is used for transmitting a wavelength signal of reflected light of the broadband light source to the fiber grating wavelength modulator; and the fiber grating wavelength modulator is used for obtaining the weight change of the cable according to a received wavelength signal. Due to the adoption of the ice coating detection device, the ice coating condition of the cable can be effectively detected.

Methods and apparatus for lenses and glasses are provided in which a lens (10) is formed with a thickness of less than 5 millimeters without grinding, and has two viewing segments (12 and 14). The first viewing segment (12) has a magnification power to correct for effects of presbyopia for near range viewing, and the second viewing segment (14) has a magnification power to correct for effects of presbyopia for intermediate range viewing.

The invention is a mobile natural gama scaling-while-drilling (SWD) well, comprising casing, fillings and hole, where the casing is anticorrosive and provided with hook outside, which can make the well moved at will, the axis in the casing is provided with glass steel hole, and the poured potassium-containing uranothorite fillings is in the annular space formed by the casing and the hole. And the measurement values of the SWD well can directly trace to the source of natural gama API industrial standard and the natural gama logging-while-drilling (LWD) device can scale in the SWD well together with the drill collar, correcting the effect of the drill collar on the natural gama counting rate and meeting the scale requirements of the natural gama LWD device.

The invention discloses a self-calibration method of a vector network analyzer based on a ten-error model. The method specifically comprises the following steps: 101) an initialization step, 102) a calibration standard component parameter setting step, 103) a calibration standard component parameter acquisition step, 104) a correction step, 105) a transformation processing step, 106) a step of calculating to obtain corresponding parameters, and 107) a test step. The invention provides the self-calibration method of a vector network analyzer based on a ten-error model, which only needs to calibrate the delay tau of a standard part Thru and the direct current resistance RM of an insertion loss IL and a load standard part Match (Load), and other calibration standard part parameters are automatically calculated in the calibration process.

The invention discloses a PCB correction method which comprises the steps as follows: a, stacking a plurality of pieces of PCBs into PCB groups, and stacking the PCB groups into a pile, wherein a heat transmission component is placed between every two PCB groups; b, applying pressure to the top of the whole pile of stacked PCB groups and heating for roasting; and c, performing cold pressing on the pile of PCBs. The invention further discloses a PCB correction device which comprises a roaster, and a carrier used for stacking and placing PCBs to be corrected; and the PCB correction device is characterized in that the carrier can be arranged in the roaster in an in-out manner, and is provided with a pressurizing component capable of applying pressure to the whole pile of PCBs simultaneously, and heat transmission components. According to the invention, pressure is applied to the top of the whole pile after the plurality of groups of PCBs to be corrected are stacked into the whole pile, so that the pile of PCBs can be corrected simultaneously, and production efficiency is improved; and compared with the traditional method, the PCB correction method and device for correcting the PCBs, disclosed by the invention, have the advantage that, double-area products can be processed every time.

The invention provides a hospital orthopedic spine correction assisting device and relates to the technical field of medical instruments. The device comprises a seat, an auxiliary correction assemblyand an adjustment fixing assembly; a motor is fixedly connected with a mounting frame, a movable cavity is formed in one side of a backing plate, one end of a screw rod is mounted at an output end ofthe motor, and a sliding table is screwed on the screw rod and located in the movable cavity; one end of a connecting rod is fixedly connected with one side of the sliding table, and the other end ofthe connecting rod extends to the outer side of the backing plate via a through hole; a movable frame is fixedly connected with one end of the connecting rod, and a first spring is fixedly connected between a spine correction block and the movable frame. Through the designed auxiliary correction assembly, the movement of the sliding table is utilized to drive pulleys and the spine correction blockto move up and down, so that correction and massage are effectively carried out on the spine of a patient for rehabilitation treatment. At the same time, by adjusting the height of support rods, theuse requirements of patients of different body shapes are met, and the correction effect of the entire device is ensured.