33results about How to "Eliminate glitches" patented technology

The invention discloses a positioning method for a sub-pixel at center of line laser in a three-dimensional laser scanning system. The method comprises the steps of firstly acquiring original image information in laser scanning from a camera, performing preprocessing on an original image, eliminating noises in the image; performing threshold segmentation on the image after noise elimination, and performing crude extraction on the line laser; eliminating a burr phenomenon in the line laser after crude extraction, and further reducing width of the line width; obtaining a sub-pixel grade coordinate of the line laser center by means of an improved gravity center method, and correcting pseudo-object pixels in the sub-pixel grade coordinate by means of Hough transform. According to the positioning method, the improved gravity center method is combined with the Hough transform, a requirement for real-time and accurate acquisition of the sub-pixel coordinate of the line laser center by the three-dimensional laser scanning system can be satisfied, and accurate positioning for sub-pixel at the center of the line laser is realized.

The invention provides a method and a system for detecting the deformation of a transformer winding. The method comprises: acquiring response end voltage and exciting end voltage of the transformer winding to be detected under different frequency; calculating a transfer function module value of the transformer winding to be detected according to the response end voltage and the exciting end voltage; drawing a frequency response curve in a coordinate system according to the transfer function module value under different frequency, and drawing a frequency response curve in the coordinate system when the transformer winding is normal; pre-processing the two frequency response curves by using an erosion method to obtain curve data satisfying a preset condition, and calculating relevant coefficients of the two frequency response curves; and judging the deformation condition of the transformer winding to be detected according to the magnitude of the relevant coefficients and relevant coefficient preset values. According to the method, the two frequency response curves drawn in the coordinate system are pre-processed by using the erosion method, so that burrs are removed, interference of noise such as electromagnetic signals and the like is avoided, the accuracy of diagnosis is improved, and the probability of misjudgment is reduced.

The invention discloses a mechanical-hydraulic servo control device for multi-shaft automobile pure rolling steering. The mechanical-hydraulic servo control device is applied to the field of automobile steering. The mechanical-hydraulic servo control device mainly comprises a switch valve, a pressure reducing valve, a one-way valve, a transverse pull rod telescoping cylinder, a mechanical-hydraulic servo control valve, an angular displacement amplifying mechanism and the like. The mechanical-hydraulic servo control valve is used for carrying out servo control over the transverse pull rod telescoping cylinder, and it is effectively ensured that all steering wheels meet the Ackerman steering condition; by means of negative feedback control of the transverse pull rod telescoping cylinder and the mechanical-hydraulic servo control valve, high-precision dynamic pure rolling steering of an automobile is achieved; oil is supplemented to a feedback cavity automatically through the switch valve, the pressure reducing valve and the one-way valve, and generation of negative pressure is eliminated. Preferably, by means of a segmented multi-stage cam curve in the mechanical-hydraulic servo control device, the transverse pull rod telescoping cylinder can be locked mechanically and hydraulically, the risk in the high-speed traveling process is reduced while the pure rolling steering effect of the system is guaranteed, and the safety of high-speed traveling of the multi-shaft automobile is promoted.

The invention discloses a method and device for extracting a magneto-rheological polishing removal function. The method comprises the following steps of acquiring the surface shape detection data of a substrate element before and after spot collection, wherein the edge of the substrate element is provided with a position mark; according to the surface shape detection data before and after speckle collection and the position mark of the substrate element, calculating to obtain the residual data; carrying out median filtering processing on the residual data; for the residual error data after filtering processing, adopting an elliptic arc to approach the contour of a removal function, and generating a plurality of removal functions containing the same parameters; and executing the data offset on the plurality of removal functions containing the same parameters, averaging, and extracting the removal functions. According to the method, the magneto-rheological polishing removal function can be accurately extracted, and the accuracy of the removal function and the magneto-rheological machining precision are improved.

The invention discloses a seismic data mapping method and system. The method comprises the following steps: a normalization step; to be specific, carrying out normalization processing on obtained seismic data; a point coordinate calculation step; to be specific, calculating point coordinates of all seismic data based on the seismic data after normalization processing, data point intervals at horizontal and longitudinal directions of channels in a visual region, and positions of all data in the channels of the visual region; and an interpolation drawing step; to be specific, carrying out linear interpolation processing according to the point coordinates, obtained by calculation, of all seismic data, thereby completing seismic data drawing. According to the invention, graph distortion and deformation during traditional seismic data region filling drawing can be prevented; the burr phenomenon is eliminated; and objectives of seismic data mapping effect optimization and data processing quality improvement can be achieved.

A multi-phase clock switching device includes a plurality of phase selection circuits. The phase selection circuit is used to receive a plurality of phase clock signals and determine how to output the phase clock signals to generate an output signal according to a switching signal. The phase selection circuit includes a selection unit and a protection unit. The selection unit receives at least a phase clock signal and determines how to output a phase clock signal according to the at least a phase clock signal and a selection signal. The protection unit determines how to generate the selection signal according to the phase clock signal and the switching signal.

The invention provides a correction circuit for an error detection and correction technology. The correction circuit comprises a pulse widening circuit module and a time sequence control circuit module, wherein the pulse widening circuit module is connected with a first signal output by an error detection circuit module of the circuit; when the first signal indicates that the circuit generates a time sequence error, the pulse widening circuit module captures the first signal and carrying out conversion to output a high-pulse width second signal; the time sequence control circuit module inputs a first clock signal of the circuit and the second signal, and generates a second clock signal which closes the first clock signal for a clock period through logic operation; when the circuit is verified, the time sequence control circuit module generates a reset signal and transmits the reset signal to the pulse widening circuit module so as to reset the pulse widening circuit module and close the second signal. The circuit is capable of decreasing the hardware overhead and reducing the working voltage and power consumption under the premise of effectively correcting time sequence errors.

The invention provides a method for observing magnetic materials by a cold field scanning electron microscope. The method solves the technical problems that ferromagnetic materials cannot be observedby the cold field electron microscope. The problems of fixing and observing of the ferromagnetic materials can be realized by equipment self-design and modification and experimental method modifying.On one hand, by self-design of a sample table, the problem of sample fixing can be solved, on the other hand, by innovation of observation conditions and parameters of the electron microscope and a shooting method, the observation effect of the ferromagnetic materials can be solved. The advantages of the method are that the new sample table can avoid damage to an electron microscope objective lensby magnetic samples, the experimental efficiency can be greatly improved, and the sample preparation process is simplified. In addition, the limitation of the cold field scanning electron microscopefor the ferromagnetic materials can also be broken, undifferentiated observation can be achieved, and the use scope of the cold field electron microscope can be expanded.

The invention discloses a manufacturing device for a working mode band of a micro-pyramid arraying structure and a manufacturing method for the manufacturing device. The manufacturing method comprisesa cylinder, and a mother mold, the mother mold is arranged on the inner surface of the cylinder, the micro-pyramid arraying structure is arranged on the surface of the side, away from the inner surface of the cylinder, of the mother mold, the cylinder comprises a first arc supporting plate, a second arc supporting plate, a hinge, and a locking device, the first arc supporting plate is hinged to one end of the second arc supporting plate through the hinge rotatably, the first arc supporting plate and the other end of the second arc supporting plate are connected and locked through the lockingdevice, a first opening and closing edge and a second opening and closing edge are arranged on the mother mold, and the first opening and closing edge is tightly matched with the second opening and closing edge. The manufacturing device can give sufficient rigidity to the mother mold, the mother mold damage due to deformation such as twisting and bending in the demoulding process is reduced, demoulding of the mother mold is facilitated, the reusing frequency of the mother mold is improved accordingly, and the quality level of obtained working mold band slicing seams is effectively improved.

The invention discloses a no-burr CMOS RF frequency divider which is based on multi-phase shifting. The invention can implement dual mode output of 4/5 division frequency ratio, radically eliminates the possibility of burr signal generation when the phase is shifted, and improves the working speed of the RF frequency divider. The no-burr CMOS RF frequency divider comprises a four-phase prescaler which is used for providing four benchmark signals with difference of 90 DEG sequentially to a high-speed output selection circuit; the output terminal of the high-speed output selection circuit comprises a 'logic or' operation; a logic control circuit is used for outputting enabling signals which can be shifted according to the output signals of the high-speed output selection circuit.

The invention discloses an asynchronous counter, which comprises an asynchronous counting circuit, a numerical value comparison circuit and a feedback reset circuit, and is characterized in that the feedback reset circuit is used for generating a second reset signal in a first state or a second state based on a counting clock signal and a comparison control signal, so the asynchronous counting circuit performs resetting or counting operation according to the state of the second reset signal, and the duration of the second reset signal is equal to preset time, namely, the feedback reset circuit delays the state of the comparison control signal to a certain degree; the second reset signal with the duration equal to the preset time is generated, so that when the reset operation needs to be carried out, the second reset signal with the longer duration can eliminate the phenomenon that the circuit generates a burr signal due to the fact that the retention time of the reset signal is too short, and the difficulty of time sequence analysis is reduced.

The invention relates to a joint ring of a special particulate filter for civil air defence. The joint ring comprises a ring body which is molded integrally by welding right-angle edge in a circle; amount port is formed in the middle of the ring body; the ring body comprises a horizontal connecting ring and a vertical connecting ring which are molded integrally; fixing holes are formed in the side wall of the vertical connecting ring, and fasteners are arranged at the outer edge of the vertical connecting ring. The joint ring is molded reliably and free of burrs; besides, material cost is saved and processing reliability is improved by application of the joint ring.