597results about How to "Reduce the difficulty of adjustment" patented technology

The present invention discloses a pixel circuit of an organic illuminated display device and a method for driving the pixel circuit; the pixel circuit comprises a first driving transistor, a second driving transistor, a storage capacitor, a coupling capacitor, and an organic light emitting diode (LED); the organic LED is driven by the first driving transistor. The method comprises the following steps: a. pre-charging: pre-charge the first drive transistor with pre-charge voltage, and holds the pre-charge voltage by means of the storage capacitor; b. storing a threshold voltage: the storage capacitor discharges the pre-charge voltage via the second drive transistor to the threshold voltage; c. writing grayscale data voltage: charge grayscale data voltage for the first drive transistor via the coupling capacitor, wherein, the grayscale data voltage is superimposed on the threshold voltage, and held by the storage capacitor. The pixel circuit and the driving method for the pixel circuit provided in the present invention can effectively suppress drifting of TFT property of the OLED unit in the organic illuminated display device, and thereby prolong the service life of the device.

A disclosed H-shaped four-crawler-belt slipform paver comprises an H-shaped telescopic chassis and crawler-type elevating turning apparatuses; the H-shaped telescopic chassis comprises two hollow longitudinal main beams, two transverse main beams and four hollow telescopic beams; the two transverse main beams are fixedly disposed between the top ends of the two longitudinal main beams; each of two ends of each longitudinal main beam is flexibly connected with the telescopic beam in an insertion manner; each telescopic beam is inside provided with a telescopic-beam oil cylinder; the top end of a piston rod of the telescopic-beam oil cylinder is connected with the telescopic beam, and the cylinder body of the telescopic-beam oil cylinder is fixedly connected with the longitudinal main beam; and the outer end of each telescopic beam is provided with the crawler-type elevating turning apparatus. The H-shaped four-crawler-belt slipform paver has the advantages that the four telescopic beams can have individual telescopic adjustment or have optionally-combined telescopic adjustment, so that the steady of the chassis and the paving flatness are guaranteed, the telescopic resistance of the telescopic beams is small, the adjustment manners are flexible and various, the application scope is wide, and the chassis can be adjusted into optional inclined angle according to different construction cases.

Disclosed in the invention is an apparatus for calibration of a laser triangulation system. The apparatus comprises a rotating platform, a top pin and a calibration cylinder; the calibration cylinder is fixedly arranged above the rotating platform; and the top pin is compressed at the upper surface of the calibration cylinder. In addition, the invention also discloses a calibration method for using the calibration apparatus. The calibration cylinder with a slit and checkerboard calibration boards is used as a tool; and on the basis of six steps, a slit image, a calibration board image and a laser image are collected and calculated in real time and whether the system calibration meets the preset requirement is determined. And at last, an imaging plane of a camera is in parallel with a reference plane; and an intersecting line of the laser and the reference plane is intersected with and is perpendicular to an optical axis of a lens. The provided method is simple and effective and can be mastered by an operator easily. Moreover, the adjustment precision is high; accuracy of the laser triangulation system can be effectively ensured; and thus the method and the apparatus have the good application prospects in the non-contact three-dimensional high-precision measurement field.

The invention relates to a weighing module which comprises a base and a weighing sensor, wherein the connecting side of the weighing sensor is installed on the base by a fastener; the base is provided with more than two installation holes; both side faces of the weighing sensor are connected with the wall of a spacing groove; the bearing side of the weighing sensor is provided with blind holes in a vertical direction; a top board or/and a bottom board of a frame-shaped rack is provided with installation holes; a bearing piece with spacing holes at the bottom is screwed on the top board of the frame-shaped rack and is fixed with the top board by a fastening bolt; both end surfaces of a rocking column respectively come into contact with the bottom surfaces of the blind holes and the top surfaces of the spacing holes; protective space A is arranged between the upper end surface of the weighing sensor and the bottom surface of the bearing piece; two horizontal spacing bolts are respectively installed on two side boards and positioned on both sides of the weighing sensor; and protective space B is arranged between the end surfaces of the horizontal spacing bolts and both side faces of the weighing sensor. The weighing module has the characteristics of high weighing precision, safety, reliability, convenient installation and maintenance, stable operation, low manufacturing cost and wide application range.

The invention relates to the field of curtain walls of buildings, in particular to a frame type unit curtain wall adopting an auxiliary installing rack, a tooth profile angle and a tooth profile support. The frame type unit curtain wall adopting the auxiliary installing rack comprises a panel (1), end columns (2), middle columns (3), end cross beams (4), middle cross beams (5), inserting cores (6), an auxiliary frame (9), a cover plate and the like. The frame type unit curtain wall adopting the auxiliary installing rack, the tooth profile angle and the tooth profile support are long in service life, low in cost, good in machinability, short in field construction period and good in sealing performance.

The invention discloses an SCR (silicon controlled rectifier) denitration reactor of coal fuel gas, which comprises a flue. A high swirl ammonia injection mixer is arranged in the flue adjacent to the upper side of a flue gas inlet corner. The high swirl ammonia injection mixer comprises a plurality of reducer ammonia injection pipes and ammonia nozzles arranged at the ends of the reducer ammonia injection pipes. The reducer ammonia injection pipes are symmetrically arranged on both sides of the flue. The direction in which a reducer is injected by the ammonia nozzles is in accordance with coming direction of the flue gas. High swirl generators connected to the inner wall of the flue are arranged opposite to the upstream of the reducer ammonia injection pipes. Each high swirl generator forms an angle of 20-70 degrees with the inner wall of the flue. Because of the special structure of the high swirl generator, after surrounding the high swirl generator, the flue gas forms large intensity stable swirl in the flowing direction so that the flue gas can entrain the reducer in a long distance downstream. According to the result of CFD (Computational Fluid Dynamics) numerical simulation, at different flue gas flowing speeds, the device can achieve good ammonia nitrogen mixing effect.

The invention relates to the optical element parameter measurement, particularly relates to a fast and accurate method for testing eyeglass with ultra-high reflectivity. In order to solve the problem that the prior art of testing eyeglass with ultra-high reflectivity has low measurement precision and the debug takes time and labor. The invention includes the following steps: (1) constructing the optical cavity and the affiliated members; (2)coinciding the reference light source and the measuring light source in space; (3) adjusting the calibration moving plate; (4) accurately adjusting the optical path closure degree of the optical cavity; (5) fine adjusting the place of the matching lens, determining the fundamental transverse mode, and causing the laser light source fundamental transverse mode to match with the fundamental transverse mode of the tested optical cavity effectively; (6) fitting by the characteristic time I(t)=I0exp(-tcL/2d) and obtaining the total loss L of the tested cavity. The invention introduces the visible light source as the reference light which greatly reduces the difficulty of adjusting of the cavity. The invention can measure and screen the optical lens with high quality in batch. The test precision of the method provided by the invention is higher than 5x10-7.

The invention provides an inverted pendulum non-linear controller design method, which belongs to the technical field of nonlinear control. According to the non-linear controller design method, a step controller design method is applied to the problem of inverted pendulum control, so that the whole performance of the controller is improved. The method is characterized by establishing a nonlinear model of an inverted pendulum system, designing a steady-state controller and designing a reference dynamic feedforward controller; designing a feedback controller: designing the feedback controller through a Lyapunov method for a closed-loop error system of an inverted pendulum; and finally, obtaining control laws of the whole system controller. The method not only solves the problem of limitation of a linear controller in a high-nonlinearity and complex-model multivariable system of the inverted pendulum, but also solves the problem that it is hard for intelligence algorithms of a cloud model and a neural network and the like to realize in the application process.

The invention relates to an LED display screen alternative point collection correction method, comprising steps of virtually partitioning an area to be corrected into a plurality of alternative point unit cell, and determining the image screen correction mode which is that LED lamps of the same color in a plurality of LED pixels in each alternative point unit cell are controlled to be illuminated for each time. Aiming for the bottleneck problem of the alternative point collection correction mode, the invention provides an LED display screen alternative point multi-lamp collection correction method, which improves the photosensitive members of the image collection device, like the effective utilization rate of the camera CCD through increasing the LED pixel quantity on a single collection image, guarantees that the brightness collected by the single collection image while reducing the complexity of regulating the parameters by the collection device, reduces the difficulty of regulating the defocusing, enables the alternative point multi-lamp collection correction mode to be highly effectively applied into the correction of a greater resolution ratio LED display screen, and saves the substantial time spending on correction.

The invention relates to the field of an optical coherence tomography system of a polarizing frequency domain and in particular relates to an optical coherence tomography system of a polarizing frequency domain of a single spectrograph based on a photoswitch. A high speed photoswitch which is divided into two paths is placed in a reference arm light path, time-shared detection of the single spectrograph for interference signals of two channels of horizontal polarization and vertical polarization is realized by means of channel selection of the photoswitch, and the detected two polarization signals are calculated to acquire an intensity image, a fast axis image and a delay image of a sample with double refraction properties. The system provided by the invention is simple in structure; the light path adjusting difficulty is greatly reduced without using a beam splitter prism, and inter-mode interference brought by a polarization beam splitter is also avoided; and meanwhile, polarization imaging can be realized without complicated phase modulation equipment and algorithms.

The invention discloses a double-wavelength single receiving channel-based rotation Raman temperature measurement laser radar. The laser radar is based on two working wavelengths and a single receiving channel. The two working wavelengths of the laser radar are respectively composed of odd number pulses and even number pulses. The low-quantum-number rotation Raman signals of one working wavelength and the high-quantum-number rotation Raman signals of the other working wavelength are extracted by the receiving channel of the laser radar. The laser radar is operated alternately at the two working wavelengths in the time division multiplexing manner. The atmospheric temperature is calculated based on the ratio of high-quantum-number rotation Raman signals to low-quantum-number rotation Raman signals. According to the technical scheme of the invention, the rotation Raman temperature measurement is realized only by means of a single filter, a single detector and a single acquisition card. Compared with a single-wavelength double receiving channel-based rotation Raman temperature measurement laser radar, the above laser radar is compact in structure, wherein the difficulty of optical path adjustment and the difficulty of system parameter calibration are lowered. Meanwhile, the double-wavelength single receiving channel-based rotation Raman temperature measurement laser radar is low in cost. The working performance difference between the filter and the detector caused by the inconsistence of working environments can be avoided. Moreover, the detection accuracy, the system stability and the environmental adaptability are improved.

The invention discloses an underactuation crane operating whole process active-disturbance-rejection control method of single parameter adjustment. The underactuation crane operation whole process active-disturbance-rejection control method is characterized in that according to starting and target locations of a trolley, safety constraint conditions such as the speed, acceleration, and operating environment of the trolley are considered, an ideal operating track, with efficiency priority, of the trolley is generated, and after compared with the actual location of the trolley, an error feedbackcontrol law of trolley movement is constructed; an expanding state observer is designed according to a crane load oscillation state equation, an error feedback control law suppressing load oscillation is constructed, and then the trolley operating track and a load oscillation active-disturbance-rejection controller which are independent of system model parameters and can effectively suppress disturbance are formed; and Hurwitz stable matrix eigenvalues are used for generating relation with control system gains, thus fussy control system parameters are adjusted and converted to single parameter adjustment easy to implement, a crane can be operated according to the set ideal track in the whole process under the uncertainty model parameters and external disturbance, and swing angles are madeas small as possible.

The invention relates to the technical field of immersed tube prefabrication construction, in particular to a dry dock sequential method full-section integral immersed tube prefabrication formwork system. The system comprises an inner mold system, an outer mold system and an end mold system, wherein the inner mold system is located on the inner side of an immersed tube casting space and is connected with the outer mold system located outside the immersed tube casting space into a whole through the end mold system positioned at the longitudinal end part of the immersed tube casting space, the lower end of the inner mold system is provided with an inner mold travelling support device which is used for carrying out longitudinal, transverse and vertical position adjustment on the inner mold system, and the outer mold system is an outer side formwork structure capable of being adjusted in the longitudinal direction, the transverse direction and the vertical position. The immersed tube prefabrication method has the advantages of being accurate in position adjusting, less in main body structure damage and capable of operating all weather, so that the technical problems of sequential prefabrication, adjacent operation, compact space, longitudinal long-distance travel of an ultra-large super-heavy formwork is long, being prone to deviation and the like which occur to a sequential methodare solved.

The present invention discloses an ultraviolet quasi-single pure-rotation Raman spectrum extraction-based all-day temperature measurement laser radar. The laser radar comprises a laser emitting unit, an optical receiving unit and a signal acquisition and control unit. The laser emitting unit emits the ultraviolet laser of 354. 82 nm in wavelength and the ultraviolet laser is adopted as a detection light source. The laser emitting unit sends a pulse laser beam to the atmosphere. The pulse laser beam and atmospheric particles interact to generate a series of discrete spectrum line scattering signals. The optical receiving unit receives the scattering signals through a telescope and then respectively and simultaneously extracts elastic scattering signals and quasi-single-branched anti-stoke pure-rotation Raman spectral line signals through three channels. The signal acquisition and control unit realizes the real-time acquisition and the inversion of signals, so that the normal and orderly operation of the entire laser radar system is ensured. According to the technical scheme of the invention, the signal-to-noise ratio of the system is enhanced, and the light-receiving path is optimized. The system stability is improved. The all-day detection of the atmospheric temperature, the aerosol space distribution and time evolution parameters is implemented.

The invention relates to a light path compensation based laser heterodyne interference measurement method and a light path compensation based laser heterodyne interference measurement device, belonging to the technical field of laser application. The invention adopts reference light and measurement light which are spatially separated from each other, and a light path compensation design is carried out; meanwhile, the method generates two interference measurement signals with opposite Doppler frequency shifts, and selectively uses the two measurement signals for carrying out interference measurement according to the movement direction and speed of a measured target. The method and the device provided by the invention not only reduces the influence of temperature change on the measurement, but also eliminates the frequency aliasing phenomenon in an interferometer, thus improving the measurement accuracy of heterodyne interference measurement; and furthermore, the problem of the limitation of laser source frequency difference to the measurement speed can be solved.

The invention discloses a Terahertz reflection imaging system based on zero order Bessel wave beams. The system comprises a Terahertz emission source, a collimating lens, a silicon chip, a diffractionelement, a focusing lens, a Terahertz detector, a sample table, a sample table moving device, a lock phase amplifier and a control module, wherein the collimating lens, the silicon chip, the diffraction element and the sample table are in sequential arrangement in a direction along the transmission direction; the center of the silicon chip is positioned in the center axial line of the transmission wave beams; an included angle between the silicon chip and the center axial line is 45 degrees; the main optical axes of the collimating lens and the diffraction element are positioned in the centeraxial line of the transmission wave beams; through the diffraction element, the transmission wave beams become the zero order Bessel wave beams; the main optical axis of the focusing lens is positioned on a reflection light path and is vertical to the center axial line of the transmission wave beam; the Terahertz detector is positioned on the focal plane of the focusing lens and is connected withthe lock phase amplifier; the control module is respectively connected with the sample table moving device and the lock phase amplifier. The Terahertz reflection imaging system can simultaneously provide high imaging quality and large depth of field.