Cotton stream velocity on-line estimation method using video to measure speed in isomerism fibre sorting system

The invention pertains to the industry testing technique field based on machine vision, which is characterized in that two linear array cameras with a setting distance are utilized to respectively extract images in which the cotton stream is partly superposed in the setting equal sampling period, according to cotton streams doing a speed changing rectilinear movement along the channel, and the image are divided into a plurality of cotton stream sub-graphs along a direction perpendicular to the cotton stream cross section direction; according to each sub-graph, the similarity between the sub-graph picked up by a linear array camera 1 and the linear array camera 2 with a different time delay delta t, thereby a similarity curve f(delta t) varying with delta t is obtained, and then calculating a time delay delta T corresponding to the maximum value f(delta T) of the curve f(delta t), namely the time delay of a same point on the cotton stream passing through two linear array cameras; and then ...

Method and device for realizing automatic gain control

The invention provides a method for reaching auto-gain control and its device. The method comprises that using the method of quadratic function matching to attain the observable estimated value and using the method of least mean square error to calculate the total gain control signal; the device mainly supplies a quadratic weighted detecting module which can attain the observable estimated value by the method of quadratic function matching and a self-adaptive control signal calculate module which can calculate the total gain control signal by the method of least mean square error. The invention increases the accuracy of attained observable estimated value and the total gain control signal, to improve the properties of catching time, traceability, and the signal-to-noise ratio of said system, therefore, the whole property of system is improved.

Large scale enlarging method for high performance digital image based on subspace decomposition

Repatching method for top liner of blast furnace hot-wind pipeline

The present invention discloses a repatching method for the top liner of a blast furnace hot-wind pipeline. According to the damage condition of the liner of the pipeline, a pipeline steel housing (1) is provided with a hole, and the periphery of the inner surface of the pipeline steel housing (1) is welded with lifting hooks (6) and a wood mould supporting is supported well (5), and then a working layer pouring material (8) and a warm keeping pouring material (7) are poured, and then the pipeline steel housing (1) is welded well; the pipeline steel housing (1) is welded with more than two mudjacking holes (9), and mudjacking material is pressed into the gap between the pipeline steel housing (1) and the warm-keeping pouring material (7), and the construction pressure is kept between 2 to 3kg/cm2. The repatching method for the top liner of a blast furnace hot-wind pipeline provided by the present invention resolves the emergency gusty repatching problem for the damage of the blast furnace ...

Frequency removal method used in extrapolation of log data under constraint of earthquake data

The invention belongs to the technique area of seismic exploration. Taking the frequency removal method commonly used in the communication area solves the multiresolution issue existed in the extrapolation of the log data under constraint of the earthquake data. The Hilbert transform technique in the communication area is utilized to expand the original earthquake signal to the pseudo super-resolution signal, which reserves the spectral texture features and obtains the expanded frequency spectrum. The pseudo super-resolution signal utilized to replace the spectrum limited measure earthquake data constrains the extrapolation of the log data so as to meet the requirement of the position constraint as well as to solve the multiresolution issue.

Machine vision detection device for industry

The invention belongs to the industrial machine vision detection device field. The invention is characterized in that: when signals which are reflected back by an object to be detected are dark signals, background light sources are used for replacing the prior background plate; under the irradiation of light sources on the other side of a physical distribution detection channel, signals reflected back by an interested object in the detection channel, namely the object to be detected, and other uninterested substances are easy to distinguish, thereby confusion of the background and the object to be detected corresponding to the dark signals is avoided and the accuracy of the machine vision detection device in detecting the object to be detected corresponding to the dark signals is improved.

Cotton stream velocity on-line estimation method using video to measure speed in isomerism fibre sorting system

The invention pertains to the industry testing technique field based on machine vision, which is characterized in that two linear array cameras with a setting distance are utilized to respectively extract images in which the cotton stream is partly superposed in the setting equal sampling period, according to cotton streams doing a speed changing rectilinear movement along the channel, and the image are divided into a plurality of cotton stream sub-graphs along a direction perpendicular to the cotton stream cross section direction; according to each sub-graph, the similarity between the sub-graph picked up by a linear array camera 1 and the linear array camera 2 with a different time delay delta t, thereby a similarity curve f(delta t) varying with delta t is obtained, and then calculating a time delay delta T corresponding to the maximum value f(delta T) of the curve f(delta t), namely the time delay of a same point on the cotton stream passing through two linear array cameras; and then ...

Construction method for curing non-aqueous slurry at normal temperature in blast furnace

The invention relates to a construction method for curing non-aqueous slurry at normal temperature in a blast furnace, which belongs to the technical field of blast furnace engineering construction. Internal self-flow casting construction is adopted at the part below a tuyere region, and the granularity and the density of the slurry are accurately adjusted in time according to the changing situation of the width between a cooling wall and a furnace shell; the gap between the cooling wall and the furnace shell of the tuyere region is small, has complicated shape and is simultaneously influenced by the installation of tuyere equipment to a larger extent, external slurry pressing construction is adopted, and a slurry pressing hole and an observation hole are arranged on the furnace shell of the tuyere region; and the grouting treatment for a thermocouple sleeve pipe is enhanced, the gas leakage of the thermocouple sleeve pipe is avoided, and meanwhile, a gas leakage passage between the cooling ...

Large scale enlarging method with high performance for digital image based on subspace decomposition

High efficient digit image large size amplification method based on subspace dissolution characterizes in converting two-dimension image interpolation into several singular vectors one-dimension interpolation containing singular value dissolution, singular value vector one-dimension interpolation and singular value restructure successively and greatly reducing the interpolation complexity by split, the ratio is reduced along with the increase of amplification of the operation time of this invented method and that of the image two-dimension three-interpolation method in a same image dimension and split dimension, such as a split dimesnion is 16*8, amplified dimension is 120 inch, if image three times interpolation is 1, image linear interpolation time is 0.42, image latest interpolation time is 0.295.

Repatching method for top liner of blast furnace hot-wind pipeline

The invention discloses a repatching method for the top liner of a blast furnace hot-wind pipeline. According to the damage condition of the liner of the pipeline, a pipeline steel housing (1) is provided with a hole, and the periphery of the inner surface of the pipeline steel housing (1) is welded with lifting hooks (6) and a wood mould supporting is supported well (5), and then a working layer pouring material (8) and a warm keeping pouring material (7) are poured, and then the pipeline steel housing (1) is welded well; a pipeline skin is welded with more than two mudjacking holes (9), and mudjacking material is pressed into the gap between the steel housing (1) and the warm-keeping pouring material (7), and the construction pressure is kept between 2 to 3kg/cm2. The invention resolves the emergency gusty repatching problem for the damage of the blast furnace hot-wind pipeline, so that the liner of the blast furnace hot-wind pipeline is repaired fast , thus improving the construction ...

CT-image re-construction system based on supporting domain

Method for producing thermosetting fluorescent plastic products or luminous plastic products and its products

A process for manufacturing thermosetting fluorescent or luminous plastic products includes preheating hot-press dies, preheating raw material, putting embedded parts, loading raw material, closing dies, prepressing, exhausting air, holding pressure for solidification, opening dies, spreading the mixture of fluorescent or luminous powder and thermosetting plastics not containing filler, closing dies again, holding pressure, opening dies, taking workpiece out and post treatment. Obtained products feature smooth surface and fluorescent or luminous nature.

Robust method for estimating instantaneous frequency of seismic signal

The invention discloses a robust method for estimating the instantaneous frequency of a seismic signal, belonging to the technical field of seismic signal processing. The method is characterized in comprising the following steps of: acquiring seismic data with seismic prospecting equipment; obtaining overlapped seismic data; setting the length of a window and the weighting order according to the length of each seismic datum; windowing a section of observing signals with the length of the window point by point, and computing the frequency domain response of analysis signals corresponding to the observing signals; performing the geometric progression weighting of amplitude to the frequency domain response, and obtaining new analysis signals by means of fast fourier inversion; obtaining estimated values of the multiple sections of the analysis signals at each time point, and taking the mean of the estimated values as the a new analysis signal corresponding to the point; and computing the instantaneous ...

Sub-pixel matching-based towline dynamic acquisition influence eliminating method

The invention discloses a sub-pixel matching-based towline dynamic acquisition influence eliminating method. The method comprises the following steps of: 1, inputting required parameters into a computer; 2, correcting survey lines one by one, namely, extracting and forming data of the survey lines into Y common offset gathers g; stacking to obtain a stack section m; performing trace interpolationon each of the common offset gathers g in a transverse direction; performing linear interpolation in a time direction; solving maximum cross-correlation of near data in each data set in the stack section m; storing the maximum cross-correlation as a data set d; and performing median filtering on the d; and 3, after processing all common offset gathers, extracting the data to form common imaging gathers for storing, namely finishing eliminating an towline dynamic acquisition influence. In the method adopted by the invention, matching is performed on the common offset gathers so as to correct the ...

Construction method for curing non-aqueous slurry at normal temperature in blast furnace

The invention relates to a construction method for curing non-aqueous slurry at normal temperature in a blast furnace, which belongs to the technical field of blast furnace engineering construction. Internal self-flow casting construction is adopted at the part below a tuyere region, and the granularity and the density of the slurry are accurately adjusted in time according to the changing situation of the width between a cooling wall and a furnace shell; the gap between the cooling wall and the furnace shell of the tuyere region is small, has complicated shape and is simultaneously influenced by the installation of tuyere equipment to a larger extent, external slurry pressing construction is adopted, and a slurry pressing hole and an observation hole are arranged on the furnace shell of the tuyere region; and the grouting treatment for a thermocouple sleeve pipe is enhanced, the gas leakage of the thermocouple sleeve pipe is avoided, and meanwhile, a gas leakage passage between the cooling ...

Sub-pixel matching-based towline dynamic acquisition influence eliminating method

The invention discloses a sub-pixel matching-based towline dynamic acquisition influence eliminating method. The method comprises the following steps of: 1, inputting required parameters into a computer; 2, correcting survey lines one by one, namely, extracting and forming data of the survey lines into Y common offset gathers g; stacking to obtain a stack section m; performing trace interpolation on each of the common offset gathers g in a transverse direction; performing linear interpolation in a time direction; solving maximum cross-correlation of near data in each data set in the stack section m; storing the maximum cross-correlation as a data set d; and performing median filtering on the d; and 3, after processing all common offset gathers, extracting the data to form common imaging gathers for storing, namely finishing eliminating an towline dynamic acquisition influence. In the method adopted by the invention, matching is performed on the common offset gathers so as to correct the ...

Method for forecasting multiple wave and primary reflection signal

The invention discloses a method for forecasting multi-wave and primary-wave signals in seismic waves, which belongs to the technical field of seismic observation signal processing. The method for forecasting the multi-wave signals in the seismic waves comprises the following steps: 1) an objective function of a formula (9) is used for optimizing the coefficient a(i) of a filter; 2) the optimized coefficient a(i) of the filter obtained in the step 1) is put into the formula (1) to obtain the multi-wave signals. The primary-wave signals in the seismic waves can also be obtained by using the seismic observation signals to deduct the multi-wave signals. The method overcomes the limitation that the traditional forecasting method needs to assume that the forecasting multiple waves and the primary wave are orthogonal and more effectively eliminates the multiple waves in the seismic signals; y(n) is equal to the summation of a(i)y(n-q-i+1), 1=< i<=M, (1); max J (a(i)) is equal to (E(G(Epsilon ...

Method for forecasting multiple wave and primary reflection signal

The invention discloses a method for forecasting multi-wave and primary-wave signals in seismic waves, which belongs to the technical field of seismic observation signal processing. The method for forecasting the multi-wave signals in the seismic waves comprises the following steps: 1) an objective function of a formula (9) is used for optimizing the coefficient a(i) of a filter; 2) the optimized coefficient a(i) of the filter obtained in the step 1) is put into the formula (1) to obtain the multi-wave signals. The primary-wave signals in the seismic waves can also be obtained by using the seismic observation signals to deduct the multi-wave signals. The method overcomes the limitation that the traditional forecasting method needs to assume that the forecasting multiple waves and the primary wave are orthogonal and more effectively eliminates the multiple waves in the seismic signals; y(n) is equal to the summation of i is equal to 1 a(i)y(n minus q minus i plus 1), (1); max J (a(i)) ...

Frequency removal method used in extrapolation of log data under constraint of earthquake data