103results about How to "Achieve high precision" patented technology

The invention discloses an autonomous synthetic aperture radar (SAR) satellite orbit determination method based on an extended kalman filter and belongs to the technical field of autonomous satellite orbit determination. Due to the adoption of a global positioning system (GPS) which adopts a half-autonomous orbit determination mode, the conventional autonomous satellite orbit determination technology has the problems of low autonomy and low instantaneity. By the orbit determination method, the problems can be solved. The method comprises the following steps of: 1, establishing a satellite motion equation based on orbit dynamics so as to obtain a state equation; 2, establishing an observation equation by taking a distance between an SAR and a ground identification point and a Doppler shiftfrom the SAR to the ground identification point as observation values; 3, establishing a recurrence equation of the extended kalman filter; and 4, thus obtaining state information of a satellite to obtain a position and a speed vector of the satellite. By the method, the orbit determination precision of the satellite is improved; the method has the characteristics of autonomy and instantaneity; and high-precision real-time autonomous orbit determination for low-orbit satellites can be realized.

The invention discloses a processing method for correcting error of a low-gradient optical mirror surface, which comprises the following steps: firstly acquiring a removal function through experiment, then using a wave surface interferometer to acquire a surface shape error function of an element, dispersing the surface shape error function, programming a processing path at the same time, extending the surface shape error function, establishing a model and solving processing residence time, carrying out numerical control processing by using the solved residence time, identifying error and controlling accuracy for the processed result, so as to finish processing. The processing method has the advantages of high process efficiency, low processing cost and good error correction effect, and can effectively correct the surface shape error of the low-gradient optical mirror surface.

The invention discloses an intelligent mark line printing machine and an automatic line printing technology adopting the intelligent mark line printing machine. The line printing machine comprises a machine table, a conveying belt, a line printing assembly, a drying device and a material collecting and stacking device. The conveying belt is matched with the machine table, and the line printing assembly is arranged on the machine tables and used for printing lines. Through a video camera, automatic visual positioning is performed, in combination with printing parameters set in a controller, positioning and generation of ink spraying trails are automatically performed on printed materials, then ink spraying line printing is finished in a full-automatic mode through the line printing assembly, the printed materials are automatically dried and collected, and therefore intelligent and automatic operation is achieved in the whole operation process.

The invention discloses a method for acquiring the C/A code signals of a GPS in the GPS communication technical field. The method comprises a rough acquisition process and a precise acquisition process. The rough acquisition process comprises the following steps: searching a plurality of parallel satellites set by a system and obtaining a rough code phase and carrier frequency by using code phase search based on FFT; and the precise acquisition process comprises the following steps: setting a precise acquisition carrier frequency step according to the code phase and the carrier frequency obtained from rough acquisition and determining the search scope of precise acquisition; and removing the correlation between input signals and local carrier signals influenced by the code phase and comparing a correlation value and a resetting threshold value to determine whether satellite signals can be really acquired. Compared with the prior GPS acquiring method, the invention improves the acquisition performance of GPS signals, ensures the GPS fast acquisition, and simultaneously achieves the high-accuracy requirements of the GPS acquisition.

The invention discloses a control device and control method for operating parameters of a cutting table of a combine harvester and belongs to the field of automation of agricultural harvesting machinery. The control device comprises a forward speed monitoring module, a crop status monitoring module, a control module and a man-machine interaction module; the crop status monitoring module is used for acquiring optical images of crops, extracting plant height, density, stubble and lodging degree information and sending the same to the control module; the control module controls the rotation speedof a reel according to the forward speed and a speed ratio model of the machine, the position of the reel according to the plant height and lodging degree, the cutting frequency according to the forward speed of the machine and the crop density degree and the height of the cutting table according to the height of stubble; the man-machine interaction module with the manual automatic switching function displays monitoring data in real time and controls the operating parameters of the cutting table through buttons. Through manual button control and intelligent automatic adjustment of the operating parameters of the cutting table system, better performance of the combine harvester is achieved, and intelligence level and efficiency of harvesting are improved.

The invention has discloses a piston outer circle diameter comprehensive measuring instrument, which solves problems in the present metering equipment that the precision is not high, the stability is poor and so on, and has the advantages of simple structure, easy to operate, high measuring accuracy. The structure of the instrument is that: a soleplate is provided, two sides of one end of which are provided with a localization block respectively, and which locates and installs a fixed vertical plate, a surveying vertical plate which comprises a big surveying vertical plate and a small surveying vertical plate is arranged to be opposite to the fixed vertical plate, and the surveying vertical plate is connected with an adjuster; a surveying plane plate is arranged between the fixed vertical plate and the surveying vertical plate, gauge head installments are arranged on both the fixed vertical plate and the surveying vertical plate; a sensor frame is installed on the soleplate at one side of the surveying vertical plate, and a dial indicator and a percent meter are installed on the sensor frame; the dial director is sliding fitted with the small surveying vertical plate by the adjuster, that is the same as the percent meter with the big surveying vertical plate, so as to get surveying value.

The invention discloses a full color OLED micro-display device manufacturing method, and the method comprises the following steps: a wafer substrate comprising a drive circuit is provided, anodic pixel points are manufactured on the wafer substrate, and an anode layer is formed; thermal evaporation is performed on an OLED display device on the anode layer; thin-film packaging is performed on the OLED display device, and a thin-film packaging layer; an RGB color filter is manufactured on the thin-film packaging layer, and a filter layer is formed; a glass cover plate fits the filter layer; the wafer substrate integrated with the drive circuit, the OLED display device, the thin-film packaging layer, the filter layer and the glass cover plate is cut, and a single micro-display chip within one inch is formed. According to the invention, the resolution ratio is improved, the manufacture cost of the device is reduced, and the productivity and the yield of the device are improved.

The invention belongs to the technical field of tunnel and underground engineering, and relates to a shield tunnel segment overall deformation monitoring device and monitoring method based on distributed fibers. The shield tunnel segment overall deformation monitoring device based on distributed fibers includes paste-type distributed fibers, a carbon fiber primer, connection fibers, a lead wire and a fiber analyzer, wherein a shield tunnel segment to be monitored is provided with a plurality of mutually parallel monitoring sections; the paste-type distributed fibers are distributed on each monitoring section through the carbon fiber primer; the paste-type distributed fibers which are arranged on the plurality of mutually parallel monitoring sections are in serial connection through the connection fibers; the fiber analyzer is arranged outside the shield tunnel segment; and the paste-type distributed fibers are connected with the fiber analyzer through the lead wire. The shield tunnel segment overall deformation monitoring device and monitoring method based on distributed fibers is high in operationality and relatively lower in cost, and can realize automation and intelligentization of shield tunnel segment overall deformation monitoring.

The present invention discloses a networked multi-axis motor synchronization control device and method. The device comprises a pulse collection module, a controller module, a synchronization serial difference bus, a multi-axis module, a servo motor drive module and a man-machine interaction module. The method comprises: the pulse collection module collects pulse signals outputted by a host command motor, the pulse signals are subjected to optoelectronic isolation processing and then are sent to the controller module, the controller module performs periodic sampling count of the received pulse signals, the pulse count is sent to the multi-axis module through the synchronization serial difference bus, and the multi-axis generates PWM control signals through the current data frame and the feedback pulse signals of a slave motor. The networked multi-axis motor synchronization control device and method is simple in structure and can realize the high-precision synchronization control of the multi-motor through the network and the remote monitoring of the field data.

Provided is a photosensitive electrically conductive paste containing silver powder, organic binder, photopolymerizable monomer, photopolymerization initiator and organic solvent. The silver powder, having a primary particle diameter of not more than 1.0 [mu]m, a specific surface area from 1.5 m2/g to 2.0 m2/g and a tap density from 2.0 to 5.0 g/cm3, is included in an amount of less than 70 mass%of the electrically conductive paste excluding the organic solvent.

The invention discloses a measuring method based on an optical fiber dispersion coefficient measuring device. The device comprises a broadband light source, an electro-optical modulator and a computer. An output end of the broadband light source is connected with an optical fiber coupler, one output end of the optical fiber coupler is connected with an electric adjustable optical fiber delay line,the optical fiber coupler and the electric adjustable optical fiber delay line form a Mach-Zehnder Interferometer, an output end of the Mach-Zehnder Interferometer is connected with a spectrometer and the electro-optical modulator, modulation signals outputted by the electro-optical modulator pass an optical fiber to be measured and then enter a high-speed photoelectric detector, the high-speed photoelectric detector converts optical signals into microwave signals which are amplified by a low noise amplifier, an output end of the low noise amplifier is connected with a microwave power divider, the microwave power divider injects parts of the microwave signals into the electro-optical modulator and simultaneously inputs other microwave signals to the spectrometer, and the tail end of the spectrometer is connected with the computer. The measuring method can realize high-precision optical fiber dispersion coefficient measurement, environmental influence is overcome, and a structure is simplified.

The invention relates to a laser transfer method and apparatus therefor, and to an organic EL panel, and an organic EL layer for forming lighting layer of the organic EL panel without using an evaporation mask. A circuit substrate (101) with an organic EL component forming portion is arranged opposite to an organic EL film (21) and on a supporting substrate (20), and a metallic subject substrate (220) is subjected to laser to generate chock wave in the supporting substrate (20). An organic EL layer is formed on the circuit substrate (101) side. In this way, organic EL panels can be manufactured in high precision and large frame and at a low cost.

This invention relates to the photoelectric sensor technology characterizing that three magnetic sensors are set uniformly spaced on a same circumference at the quadrant position, the output signals of them are connected with an amplifier separately, the output signals of three amplifiers are connected with an AD converter connected with a multiplier, the output signal of a factor corrector is connected with the other input end of the multiplier, the output signal of which is connected with the input of a synthesizer, the output signal of which is taken as the input of the first and second storages, the other output signals of the synthesizer and the second storage is connected with the input of a factor corrector, the output signal of the first storage is connected with an angle converter.

The invention provides a driverless automobile dynamic lane changing track planning method based on a Fraenet coordinate system. The method comprises the steps of establishing a path generation model,sensing the environment, sending a lane changing instruction by an upper behavior decision layer, planning an alternative motion track set by the path generation model, selecting alternative tracks and the like. According to the method, a discrete global trajectory is used as a target path, a cubic polynomial is adopted, the algorithm complexity is low, and the feasibility is good.

The invention belongs to the technical field of integrated circuit design, in particular a radio frequency signal power detection circuit. The radio frequency signal power detection circuit comprises a rectifier, a gain-variable transimpedance amplifier, a level adjusting circuit, a high-precision comparator, a counter and automatic gain control circuit, an RC calibrating circuit and a clock generation and control circuit. The power detection circuit realizes the function of detecting the frequency signal power through voltage detection and programming adjustment and control of the dynamic range of the detection circuit according to the input signal power. In order to realize the high precision and high dynamic range, the RC charging and discharging circuit is provided with the special RC calibrating circuit. The clock generation circuit is used for controlling the comparator, the RC charging and discharging circuit, the RC calibrating circuit and the counter and automatic gain control circuit to work. With the RC charging and discharging circuit, the RC calibrating circuit and the automatic gain control circuit additionally arranged in the power detection circuit, the invention realizes the high dynamic range and high-precision logarithmic-to-linear power detection for the radio frequency signal.

Disclosed is a lubricant composition for fine blanking, which is an environmental-friendly chlorine-free working oil but still enables a die life comparable with the case where a chlorine-containing oil is used. The lubricant composition for fine blanking provides a product having a good shape. The lubricant composition for fine blanking contains 10-50% by mass of an active sulfur compound and 2-10% by mass of a thiadiazole derivative.

The invention relates to a control method for improving the angular-displacement accuracy of a rotary-table bearing, wherein the rotary-table bearing (3) comprises an outer ring (3.1), a radial roller (3.2), a shaft ring (3.3), an inner ring (3.4), a connecting bolt (3.5), a holding frame (3.6) and an axial-thrust cylindrical roller (3.7). The shaft ring is provided with a short graduated slot (3.3.1) and a long graduated slot (3.3.2) and is plated with chromium. A supporting seat (1) is processed according to the shape characteristic of the rotary-table bearing (3), two transmission-type grating sensors (4) and a reflection-type grating sensor (2) are installed on the supporting seat, a leading-out wire of each sensor is connected with a conditioning-circuit box (5), the transmission-type grating sensors are used for monitoring the short graduated slot of the shaft ring and performs the action of monitoring the actual deflection quantity of the angular displacement of the shaft ring, and the reflection-type grating sensor is used for monitoring the long graduated slot of the shaft ring and performs the action of a monitoring criteria. The control method is applicable to a rotary table or an index disk for a numerically-controlled machine tool having high requirements for the angular displacement.

Provided is an internal combustion engine control device which can compensate a weak point in the so-called torque-demand control so as to accurately reflect a request for the internal combustion engine performance in a control amount of each actuator. Requested values of a torque, efficiency, and an air-fuel ratio and engine information are inputted to an engine inverse model (30) so as to calculate actuator request values for realizing the requested values by using the engine inverse model (30). Moreover, an actuator direct request value is also acquired for each of the actuators (2, 4, 6). Control of the actuators (2, 4, 6) can be switched between control based on the actuator request values and control based on the actuator direct request values.