34results about How to "Avoid discreteness" patented technology

The invention discloses a measuring device and method for rock tensile strength. The device includes a lower seat, an upper seat, a lower pressure-resistant block, an upper pressure-resistant block, a force applying mechanism and a displacement sensor; the force applying mechanism includes a cylinder liner and a piston The rod and the cylinder liner are set in the lower pressure-resistant block, the area between the bottom of the cylinder liner and the lower pressure-resistant block is a high-pressure chamber, and the top of the piston rod extends out of the cylinder liner to contact the upper pressure-resistant block; one side of the upper seat is in contact with the upper pressure-resistant block. The pressure blocks are connected, and a tension reset mechanism is set between the lower seat and the upper seat and / or between the lower pressure block and the upper pressure block; the lower seat and the lower pressure block are connected through a high-pressure joint, and the output port of the high-pressure joint is connected to the The high-pressure chamber is connected, and the input from the high-pressure joint drives the movement of the piston rod to realize the expansion of the lower pressure-resistant block and the upper pressure-resistant block to cause tensile failure of the rock sample to be tested. The rock sample to be tested cracks from the separation of the upper and lower pressure blocks, and the cracking position of the test is controllable, thus ensuring the repeatability of the test.

The invention discloses a device for preparing multi interbedding rock-soil modeling materials, which comprises a material box, a horizontal push pedal, a T-shaped frame, a regulating nut and fastening bolts, and is characterized in that the T-shaped frame is provided with the regulating nut after passing through a square hole on the horizontal push pedal; the horizontal push pedal is positioned at the top of the material box and is provided with an embossment which is internally provided with a square hole; the bottoms of the two sides of the horizontal push pedal are wielded with a strip steel respectively; the material box is composed of five steel plates, namely first, second, third and forth side plates as well as a base plate; the adjacent side plates are connected through the fastening blots; the base plate is drilled with a screw hole; the first, second, third and the forth side plates as well as the base plate are all wielded with angle iron; the opening of the angle iron corresponds to the screw hole on the base plate; the first, second, third and fourth side plates are respectively connected with the base plate through the fastening bolts; and the left and right side plates of the material box are respectively provided with two screw holes. The invention has simple structure, is easy to process, and has the advantages of simple operation and high work efficiency.

The invention relates to a quasi-square-wave pulse generator, specifically to a high-voltage long-pulse-width quasi-square-wave pulse generator, and belongs to the technical field of pulse power. The pulse generator consists of three parts, including a pulse formation module, a pulse voltage boosting module and a load, wherein the input end of the pulse formation module is connected with the output end of a primary energy storage system while the output end of the pulse formation module is connected with the input end of the pulse voltage boosting module; and the output end of the pulse voltage boosting module is connected with the load. The invention, aiming to overcome the shortcomings of an over large number of network nodes required by the pulse formation module, short service life, relatively poor output waveform flat stability, severe waveform distortion of the pulse voltage boosting module, low pulse voltage boosting ratio and the like by solving technical problems, provides the high-voltage long-pulse-width quasi-square-wave pulse generator; and the high-voltage long-pulse-width quasi-square-wave pulse generator has the advantages of relatively low cost, less network nodes, maintenance-free property, high pulse voltage boosting ratio, distortionless pulse waveform and the like, so that high-voltage long-pulse-width quasi-square-wave pulse output with high flat stability is realized.

The invention relates to a low grey scale correction method and system of an LED display device. The method comprises the steps that (a) the LED display device is controlled to display colors of multiple gray scales, and data acquisition is carried out on the colors of multiple gray scales so as to at least acquire multiple brightness measurement values corresponding to the multiple gray scales, wherein the colors are the same basic color, and the multiple gray scales are part of gray scales, within a low grey scale range, of all gray scales corresponding to the basic color; (b) multiple regulation coefficients corresponding to the multiple gray scales are acquired at least through the difference between the acquired multiple brightness measurement values and brightness target values corresponding to the multiple gray scales, and the multiple regulation coefficients are uploaded to the LED display device so that the LED display device can change the LED driving current according to the multiple regulation coefficients when displaying the multiple grey scales and the multiple grey scales can be corrected. According to the low grey scale correction method and system of the LED display device, by correcting the low grey scales one by one, the LED display device can make a linear response to current signals when displaying the low grey scales.

The invention discloses a digital-analog hybrid mode clock duty ratio calibration circuit which is characterized by comprising a pulse generator (1), a half-period delay line (2), a RS trigger (3), a single end-to-difference switching circuit (4), a digital-analog hybrid charge pump (5) and an error amplifier (6), wherein the input end of the pulse generator (1) is connected with an original input clock signal (CKI) to be calibrated; and the output end signal of the pulse generator (1) is a buffered input clock pulse signal (CKB), and the signal is simultaneously connected to the clock input end of the half-period delay line (2) and the setting input end (S) of the RS trigger (3). The digital-analog hybrid mode clock duty ratio calibration circuit disclosed by the invention overcomes the discrete type existing in the adjustment of the traditional pure digital mode duty ratio calibration circuit, realizes the continuous duty ratio adjustment, adopts fully-digital processes, and obtains higher adjustment accuracy under the condition of consuming small area and power consumption.

The invention relates to an integrated circuit substrate. The substrate comprises a copper coated core board, wherein the circuit function of the integrated circuit package substrate is favorably improved or extended by forming an annular groove for accommodating a magnetic ring in the copper coated core board, i.e., a micro transformer can be integrated in the integrated circuit substrate by winding connection on via holes which are internally and externally distributed along the magnetic ring, the copper coated core board is characterized by comprising a substrate body, the substrate body comprises the copper coated core board, the copper coated core board comprises a core board, an upper copper coated layer and a lower copper coated layer, the upper copper coated layer is combined with a surface of the core board, the lower copper coated layer is combined with a bottom surface of the core board, the annular groove is formed in the core board and is provided with an opening facing upwards, and the opening extends out of the upper copper coated layer.

The invention discloses an automatic centering device and a using method thereof. The automatic centering device is characterized in that: a displacement loading mechanism is arranged at an elevator mechanism; a power loading mechanism is arranged on the upper part of the displacement loading mechanism; the position of the displacement loading mechanism close to the center is provided with a vertical machine frame; a loading head is arranged at the lower end of the vertical machine frame; a centering industrial camera is arranged in the vertical machine frame on the upper part of the loading head; a torque sensor is arranged in the vertical machine frame on the upper part of the centering industrial camera; and a centering mechanism is arranged at the vertical machine frame on the lateralpart of the centering industrial camera. In the automatic centering device, image detection data is transmitted to a computer and is subjected to high-speed processing by utilizing high-precision industrial image equipment, so that the high-efficiency, high-precision and full-automatic centering operation is realized by matching with special processing software. The automatic centering device hasa reasonable and reliable integral structure, improves the accuracy and precision of tests and the reliability of test data, avoids the discreteness of centering indeterminacy and reduces error caused by artificial operation.

The present invention relates to a method for analyzing the collapse of a multi-story RC frame structure under the earthquake. The method is characterized in that: without dividing the earthquake action through the seismic intensity level, based on the component coefficient of the seismic effect of the component, the importance of each component of the frame is embodied, and the collapse failure criterion of the structure is defined; and the thinking of reverse analysis is used, the solution of seismic characteristic quantities can be obtained through the collapse critical state of the structure, so that a characteristic quantity solution set of the collapse of the RC frame structure can be obtained, and the collapse of the structure under the earthquake can be analyzed and determined to realize the earthquake vulnerability analysis process.

The invention discloses an intelligent infrared multi-component noxious gas monitoring method and the equipment, an infrared light source self with a parabolic reflection mirror sends out infrared light focused by a focusing lens, after vortically filtered and modulated by a gas related filtering round and the focused infrared light enters the entrance port of a multiple reflections gas absorption cell, the testing multi-component gas flows through the multiple reflections gas absorption cell, after reflected many times in the multiple reflections gas absorption cell the incident light outgoes from an exit portal, and is received by an infrared detector, which converts a light signal to an electrical signal, the electrical signal is amplified and sent to a signal processing and a display unit to carry on analysis processing, simultaneously, communicates with a PC machine. Because the invention combines with the gas related filter and the optical filter, the problem of the cross interference of the testing of the multi-component gas can be solved well, a time multi-beams system formed by the gas related filtering round only needs one infrared detector, so that the quantity of the infrared detectors can be saved, and the divergence due to different detectors can be avoided.