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62results about How to "Reduce process error" patented technology

Dynamic system multi-physics field imaging detection system

InactiveCN104236695AImproving Simultaneous Sampling AccuracyReduce Image Processing ErrorsSubsonic/sonic/ultrasonic wave measurementUsing wave/particle radiation meansAmbulatory systemImage capture
The invention discloses a dynamic system multi-physics field imaging detection system which comprises a digital projection illuminating device. The digital projection illuminating device is arranged right in front of a measured vibration object, multi-spectral cameras are symmetrically arranged on the two sides of the digital projection illuminating device, and the surface of the measured vibration object radiates under the irradiation of the digital projection illuminating device. A synchronous sampling device controls the multi-spectral cameras to capture a radiance image of the measured vibration object at the same time, an image capture card is connected with the multi-spectral cameras to be used for collecting data and outputting the image data to an information storing device and an information processing system, the synchronous sampling device is connected to the information processing system, and the information processing system is a PC. According to the dynamic system multi-physics field imaging detection system, a digital projector is used for lighting, the synchronous sampling system is additionally arranged, so that measuring errors are reduced, and the measuring accuracy is improved; the wavelength measuring range is wide, a plurality of wavebands can be measured, the multiple physical quantities such as the vibration source temperature and the materials can be detected, and therefore the measuring reliability and the measuring precision are improved.
Owner:HEFEI UNIV OF TECH

Voltage signal conditioning circuit of automatic reclosing lock breaker in time of electric leakage

InactiveCN103364613AMeet the requirements of precise measurementAchieve universalCurrent/voltage measurementEngineeringFeedback circuits
The invention relates to a voltage signal conditioning circuit of an automatic reclosing lock breaker in the time of electric leakage. A phase line of power supply phase voltage or line voltage goes through the anode of a diode D1 and the cathode of the phase line is connected with one end of a resistor R1. The voltage signal conditioning circuit further comprises a phase voltage and line voltage selecting circuit, a voltage feedback circuit, a diode D2, a direct-current power supply VCC, an analog-digital converter AD1, a resistor R4 and a filter capacitor C1. A null line of the phase voltage and line voltage selecting circuit or the other phase line of the line voltage is connected with the input end of the phase voltage and line voltage selecting circuit. One end of the voltage feedback circuit is connected with the R1 and the other end of the voltage feedback circuit is connected with the phase voltage and line voltage selecting circuit. The diode D2 is connected with the voltage feedback circuit. The direct-current power supply VCC is connected with a photoelectric coupler U1a. The analog-digital converter AD1 is connected with a photoelectric coupler U1b. One end of the resistor R4 is connected with five pins of the photoelectric coupler U1b and the other end of the resistor R4 is connected to the ground. One end of the filter capacitor C1 is connected with the analog-digital converter AD1 and the other end of the filter capacitor C1 is connected to the ground. The voltage signal conditioning circuit of the automatic reclosing lock breaker in the time of electric leakage can solve the problem of temperature excursion, improve linearity and achieve common use of a three-phase three-wire system and a three-phase four-wire system.
Owner:CNC ELECTRIC GRP

Preparation method of poly(p-phenylene benzobisoxazole) fibers

The invention belongs to the field of high-performance fibers, and particularly relates to a preparation method of poly(p-phenylene benzobisoxazole) fibers. The preparation method comprises the following steps of taking frozen polyphosphoric acid powder, phosphorus pentoxide, 4,6-diaminoresorcinol hydrochloride and terephthalic acid as raw materials, putting the phosphorus pentoxide into a reaction system step by step in a reasonable proportion in a proper time period, and detecting and regulating the apparent viscosity of the materials in real time in a prepolymerization process to ensure that a prepolymer with uniform apparent viscosity is obtained; performing post-polymerization to obtain PBO spinning slurry; and performing dry-jet wet spinning and post-spinning to obtain the finished PBO fibers. The method overcomes the defects that traditional solid raw materials are poor in solvent mixing and dispersing effect, easy to agglomerate and incapable of uniformly reacting, ensures the consistency of a prepolymerization reaction end point, and reduces the process errors. The intrinsic viscosity of the polymer in the same batch in different time periods is small in change and high, the mechanical property of the fibers can be obviously improved, and the quality stability is also improved.
Owner:SHANDONG NON METALLIC MATERIAL RES INST

Method and system for eliminating direct current offset between electrodes based on chopping technology

The invention discloses a method and a system for eliminating direct current offset between electrodes based on a chopping technology. The method comprises the following steps: step S1, outputting an electroencephalogram signal after chopping modulation and a direct current offset signal between the electrodes; s2, outputting direct current offset current between the electrodes; s3, extracting an integral direct current offset signal; s5, the electroencephalogram signals enter a chip amplification module to be amplified and demodulated, the electroencephalogram signals are returned to an original electroencephalogram signal frequency band, and original electroencephalogram signals are obtained; s6, filtering the original electroencephalogram signals through a low-pass filter to obtain noise-filtered electroencephalogram signals; and S7, transmitting the noise-filtered electroencephalogram signal into a digital-to-analog converter, and converting the noise-filtered electroencephalogram signal into a digital signal. The direct-current servo circuit effectively suppresses direct-current offset between the electrodes, compared with a traditional direct-current servo circuit, the process delay is reduced, meanwhile, the capacitance value of the input capacitor in the circuit is the same as that of the feed-forward capacitor, an ABBA type layout arrangement mode can be adopted, and process errors in the chip manufacturing process are effectively avoided.
Owner:ZHEJIANG LAB

Floating rate bond pricing and risk interest arbitrage method

InactiveCN104182895AReduce process errorHelp in decision makingFinanceSimulationErrors and residuals
The invention discloses a floating rate bond pricing and risk interest arbitrage method, which relates to the technical field of financial market activities. The floating rate bond pricing and risk interest arbitrage method comprises the following steps: analyzing according to an existing national debt on-demand yield curve, calculating an implicit long-term base rate through a no arbitrage principle, judging implicit interest rate raising anticipation in the on-demand yield curve through a long-term base rate level, and combining with practicality to judge corresponding investment value; obtaining a data processing request message containing bond information from a transaction processing server; according to the bond information, generating the actual daily rate approximate value of bond, and causing that the discount or premium distribution on the same day of a bond due date is zero; detecting whether the actual daily rate approximate value is smaller than a precision threshold; and according to the actual daily rate approximate value which is smaller than the precision threshold, generating the actual daily rate when the bond due date is zero. The implicit future base rate anticipation of the floating rate bond is directly obtained by virtue of a rate exchange market, data processing errors are reduced, and the method is visual and simple and is favorable for investors to make a decision.
Owner:CHONGQING UNIV OF EDUCATION

Production process for left-rear side inner car door panel assembly

The invention relates to a production process for a left-rear side inner car door panel assembly. The production process comprises the following steps: welding an upper frame assembly; welding an anti-collision rod assembly; welding the inner car door panel assembly; locating the inner car door panel assembly; installing the upper frame assembly; locating an upper nut plate and a lower nut plate; clamping the upper frame assembly, the inner car door panel assembly, the upper nut plate and the lower nut plate through a clamp, and welding contact points of the upper frame assembly, the inner car door panel assembly, the upper nut plate and the lower nut plate; installing an outer panel support plate; clamping the outer panel support plate through a clamp, and welding contact points of the outer panel support plate and a fixture in an eighth step; installing the anti-collision rod assembly; and clamping the anti-collision rod assembly through a clamp, and welding contact points of the anti-collision rod assembly and a fixture in a tenth step. According to the production process, a process error of the left-rear side inner car door panel assembly is reduced, a large fit clearance or fit extrusion of the left-rear side inner car door panel assembly is avoided, assembly and machining for left-rear side outer car door panels relative to the left-rear side inner car door panel assembly is benefited, and the rejection rate of left-rear side car doors is reduced.
Owner:安徽大洋机械制造有限公司

Clamp special for machining valve block of pneumatic roof bolter

The invention discloses a clamp special for machining a valve block of a pneumatic roof bolter. The hole pitch precision of the valve block of the roof bolter can be effectively improved, the technological error is reduced, using is convenient, and the structure is simple. A disc is arranged on one side of a fixed support of the clamp, and the disc is connected with the fixed support through a central spindle assembly; the central spindle assembly comprises a bearing arranged at one end of the disc and is used for supporting the disc and all fixing pieces on the disc to rotate around the axis;the clamp further comprises an upper drill mold plate, a lower drill mold plate, a left vertical plate and a right vertical plate, a positioning pin and a positioning inserting pin; the upper drill mold plate, the lower drill mold plate, the left vertical plate and the right vertical plate are fixed to the disc through bolts; a plurality of hole positions are formed in each of the upper drill mold plate and the lower drill mold plate; the upper drill mold plate, the lower drill mold plate, the left vertical plate and the right vertical plate form a square box whole; the positioning pin is connected with the upper drill mold plate and used for positioning the workpiece precision; and pin holes matched with the positioning inserting pin are formed in the fixed support and the disc and usedfor limiting the relative motion of the fixed support and the disc.
Owner:ANHUI SHENGTAI ELECTRIC

High-efficiency coupling structure among silicon-based optical waveguides and manufacturing method thereof

The invention provides a high-efficiency coupling structure among silicon-based optical waveguides and a manufacturing method thereof. The structure comprises: (1) a standard silicon-based optical waveguide, which is 450-500 nanometers in width and serves as a waveguide of an optical device; (2) a tapered transition waveguide, which is 10-20 micrometers in length and serves as a transition waveguide among optical waveguides with different widths; and (3) a coupled zone fine waveguide, which is 380-420 nanometers in width and 10-15 micrometers in length and serves as an evanescent wave coupling waveguide. The manufacturing method includes the following steps: 1) using a photoresist to make a mask on a silicon-on-insulator; 2) making a trapezoid silicon-based optical waveguide through an inductively coupled plasma through etching; and 3) removing the photoresist mask and thus finishing manufacture of the high-efficiency coupling structure among silicon-based optical waveguides. The advantages are as follows: the trapezoid fine waveguide is adopted to serve as a coupling waveguide in a coupled zone, so the coupling efficiency among waveguides in a condition of the same coupling space is increased, a space among waveguides in a condition of the same coupling efficiency is increased, technical errors generated by proximity effects when electron beams etch the coupled zone are reduced, and technical tolerances are increased.
Owner:NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD

Terahertz quasi-elliptical waveguide filter that is easy to implement by CNC

PendingCN109509948AGood edge selectivityReduce lossWaveguide type devicesResonant cavityElectricity
The invention provides a terahertz quasi-elliptic waveguide filter that is easy to implement by CNC. The filter comprises an upper structural block and a lower structural block. The upper structural block and the lower structural block are detachably connected, and an H-face single-sided crack waveguide structure is arranged between the upper structural block and the lower structural block. The H-side single-sided crack waveguide structure comprises a source input waveguide, a load output waveguide and four resonant cavities in the same size. The four resonant cavities are arranged in a foldedmanner along an H-face, and adjacent resonant cavities are magnetically coupled, and cross electric coupling is used between non-adjacent resonant cavities. The high-frequency filter can be processedby a CNC process and gold is plated on an outer layer. The filter operates in a 220 GHz band and has a low insertion loss characteristic of -0.6 dB, and two distinct zero points near a passband existout of a band, so that the edge selection characteristic of the filter is very good, that is, the filter has a quasi-elliptical response. The filter is applied to a terahertz detection system to achieve continuous spectrum astronomical observation with 10% bandwidth in the 220 GHz band.
Owner:NANJING UNIV OF INFORMATION SCI & TECH

Flat oxygen sensor and preparation method thereof

ActiveCN102608193BDefects in homogenization preparation processHigh strengthMaterial analysis by electric/magnetic meansInsulation layerOxygen sensor
The invention discloses a flat oxygen sensor and a preparation method thereof. The flat oxygen sensor comprises a sensor chip prepared by seven layers of zirconium oxide ceramic raw pieces which are 0.2 to 0.25 mm thick, wherein the chip sequentially comprises a signal functional layer consisting of the first and second layers of ceramic raw pieces, a reference channel functional layer consisting of the third, fourth and fifth layers of ceramic raw pieces and a heating functional layer consisting of the sixth and seventh layers of ceramic raw pieces; an outer electrode and a signal electrode pin are arranged on the upper surface of the first layer of ceramic raw piece; a porous protection layer is arranged on the outer electrode; a lead protection layer is arranged on the signal electrode pin; a reference electrode is arranged between the second and third layers of ceramic raw pieces; a heater is arranged between the fifth and sixth layers of ceramic raw pieces; an upper heater insulation layer and a lower heater insulation layer are arranged on and below heater respectively; and a heating electrode pin is connected to the heater. The preparation method comprises the following steps of preparing, forming, printing and stacking the ceramic raw pieces and sintering the sensor.
Owner:WUXI LONGSHENG TECH

Process method for improving interlayer alignment accuracy in multilayer co-fired ceramic circuit processing

The invention discloses a process method for improving interlayer alignment accuracy in multilayer co-fired ceramic circuit processing. The process method comprises a step of inhibiting deformation of raw ceramic and a step of coating with an adhesive coating before lamination. The step of inhibiting deformation of the raw ceramic comprises: firstly, carrying out demoulding and aging on the raw ceramic, then carrying out secondary lamination on the aged raw ceramic, eliminating a residual stress between a film and the raw ceramic, and reducing a deformation quantity to below 0.03% from conventional over 0.06%; the step of coating with the adhesive coating before lamination comprises the following steps: before the raw ceramic is laminated, coating the raw ceramic with one layer of adhesive coating on a hot plate with a temperature of 35 DEG C to 50 DEG C, implementing adhering of adjacent layers of raw ceramic after lamination, integrally fixing each layer of raw ceramic, and then proceeding a subsequent process. The adhesive coating can be decomposed and discharged at a temperature interval of 400 to 600 DEG C, does not interfere performance of a circuit substrate and has excellent compatibility. The process method disclosed by the invention has the advantages of low cost, wide application range and convenience in use; interlayer alignment accuracy of the circuit substrate can be effectively improved; alignment accuracy is below 30mu m.
Owner:SOUTHWEST CHINA RES INST OF ELECTRONICS EQUIP

Off-axis MEMS micro-mirror and preparation method thereof

The invention discloses an off-axis MEMS micro-mirror and a preparation method thereof, and relates to the technical field of MEMS. The off-axis MEMS micro-mirror comprises a first micro-mirror, a second micro-mirror, a first fixed comb tooth, a second fixed comb tooth and a driving electrode, the first micro-mirror and the second micro-mirror synchronously rotate by taking a rotating shaft as an axis, the first micro-mirror is used for scanning reflection of incident laser, the second micromirror is used for synchronously receiving reflected laser, and the driving electrode provides driving voltage; a first vertical comb tooth pair, a second vertical comb tooth pair and a third vertical comb tooth pair are formed between the movable comb teeth of the two micro-mirrors and between the movable comb teeth of the two micro-mirrors and the two fixed comb teeth respectively, and the first vertical comb tooth pair and the second vertical comb tooth pair provide clockwise deflection driving force for the first micro-mirror and the second micro-mirror respectively; and a third vertical comb tooth pair provides driving force deflecting in the anticlockwise direction for the first micro-mirror and the second micro-mirror, the two micro-mirrors attract each other in a certain period by manufacturing the potential difference between the vertical comb tooth pair structures, independent control is not needed any more, and the completely same-frequency and same-phase deflection state is achieved.
Owner:无锡微视传感科技有限公司
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