532results about How to "Improve the accuracy of use" patented technology

The invention relates to an on-line double-sided automatic thickness measuring device of organic glass, which mainly comprises a control system, a machine frame, a support frame, a detection frame, a cross beam, a cross beam regulator, a feeding distance measuring device and a plurality of thickness measuring devices, wherein the upper end of the machine frame is fixedly connected with the detection frame, the cross beam is connected onto the upper edge frame of the detection frame through the cross beam regulator, the inside of the detection frame is fixedly connected with the support frame, a plurality of support guide shafts are arranged on the support frame, a feeding speed measuring device is arranged at one end of any support guide shaft for measuring the feeding distance of an organic glass plate, the thickness measuring device comprises upper thickness measuring units and lower thickness measuring units, and a plurality of upper thickness measuring units and lower thickness measuring units are respectively and symmetrically arranged on the cross beam and the detection frame for detecting the thickness information of the front side and the back side of multi-point positions of the organic glass plate. Because the control system is used for processing and calculating the position information of entity space three-dimensional lattices of the organic glass in real time for confirming the dimension quality of the plates, the on-line double-sided automatic thickness measuring device has the advantage of simple and compact structure, and can be directly arranged at a production line for real-time measurement.

The invention discloses a pedestrian autonomous navigation calculation algorithm based on an MEMS-IMU. Two IMU systems are simultaneously and fixedly connected with the two feet of the user of a pedestrian navigation system; the two systems respectively perform a strapdown inertial navigation calculation algorithm and a zero-speed correcting algorithm on the basis of Kalman filtering, and then the positioning information of the two feet is fused; when the calculation distance between two feet exceeds the largest step size gamma between the two feet, inequality constraint is performed on navigation results of two IMUs by adopting a state constraint Kalman filtering algorithm, so that vague human physiological property problem is converted into a rigid mathematical problem, the optimal estimation of navigation results is achieved, and pedestrian navigational positioning function with higher accuracy is achieved.

The invention discloses a method of a micro combined multi-sensor navigation system with quick outfield calibration, and the micro combined multi-sensor navigation system of the method comprises a two-dimensional obliquity sensor, a micro magnetic compass, three silicon MEMS gyros and three silicon MEMS accelerometers. In order to improve the use precision of the micro combined multi-sensor navigation system, the method of the invention discloses that the instant quick outfield calibration is implemented on the micro combined multi-sensor navigation system before use; wherein, the two-dimensional obliquity sensor provides a calibration horizontal benchmark, the micro magnetic compass provides a calibration azimuth benchmark, the three silicon MEMS gyros and the three silicon MEMS accelerometers measure the output of angular velocity and accelerated velocity, and seven core error coefficients of the micro combined multi-sensor navigation system are calibrated in a data post-processing. The method of the micro combined multi-sensor navigation system with quick outfield calibration is simple, convenient and efficient, overcomes the defect that the repetitiveness of each starting of the micro combined multi-sensor navigation system is bad, directly improves the precision of each use, and avoids the inconvenience that is caused by the dependence of traditional calibration methods on special high-precision laboratory equipment.

The invention relates to a low temperature air supply air conditioner device for naval vessels and a control method thereof. The low temperature air supply air conditioner device comprises an air conditioner, a fresh and return air mixing box which is provided with a primary return air port and a fresh air port, and a PLC control system. The primary return air port is provided with a primary return air valve and a first temperature and humidity sensor; the fresh air is provided with a fresh air valve; the air conditioner is provided wit a secondary return air port; the secondary return air port is provided with a secondary return air valve and a second temperature and humidity sensor; an exhaust box of the air conditioner is provided with a third temperature and humidity sensor; and the first return air valve, the second return air valve, the first temperature and humidity sensor, the second temperature and humidity sensor, the third temperature and humidity sensor and the fresh air valve are all connected with the PLC control system. In the invention, the shell of the air conditioner is provided with a primary air port, the secondary return air port and the fresh air port; a plurality of temperature and humidity sensors are matched with a plurality of air valves to ensure the low temperature air supplying and the temperature control accuracy, exactly control the water supply temperature and effectively control air supply condensation. The device is simple and compact in structure, high in service accuracy of low temperature air, and high in safety. The device is fit for naval vessels and submarines and the like.

The invention discloses a polymer dielectric medium with low dielectric constant and low loss and a preparation method of the polymer dielectric medium. The polymer dielectric medium comprises the following raw materials: 50-60% of epoxy resin system, and 40-50% of mixed boron nitride nanoparticles, wherein the mixed boron nitride nanoparticle is a mixture of a boron nitride nanotube and a boron nitride nanotube; the epoxy resin system is formed by 100phr of epoxy resin E-51, 85phr of methyl hexahydrophthalic anhydride and 1phr of benzyl dimethylamine in a mixing manner. The thermal breakdown voltage of the polymer dielectric medium is significantly improved by the polymer dielectric material with high heat conductivity and high electric breakdown, the service life is prolonged, the dielectric constant and loss and the heat expansion coefficient are reduced, the mechanical strength and the tenacity are improved, the highest heat conductivity can be up to 5.26W/mK, the volume resistivity is about 1014ohm.cm, the thermal breakdown voltage is about 2-3kV/mm higher than that of the similar heat-conducting polymer dielectric medium, and the dielectric constant and the loss are a little lower than those of pure resin.

The invention discloses a triaxial integrated optical fiber gyroscope inert measurement device based on optical source cold standby, and a compensation and installation method. The triaxial integrated optical fiber gyroscope inert measurement device comprises a body, two triaxial shared optical sources, an optical source driving and refrigerating circuit, three framework-free optical fiber loop meter heads, three optical fiber gyroscope signal processing and interference circuit digital boards, a system signal processing and interface circuit digital plate, a secondary power supply module, a frequency and voltage conversion simulation circuit, three electric connectors and a reference mirror. The three optical fiber loops share an optical source, and a standby cold optical source is provided, thus the reliability is high; the installation error correction method used by the invention can effectively reduce the triaxial cross coupling; the circuit boards are installed on a lateral cover and an upper cover for the convenience of radiation protection design; meanwhile, the favorable heat radiation is realized; framework-free optical fiber loops are used, the adaptability of a magnetic environment and a radiation environment is improved.

An astatic multi-position high-accuracy calibrating method of inertia measurement unit can accurately calibrate out 33 error coefficients in 7 types such as gyroscope scale factor gyroscope erection error, accelerometer scale error, etc by making IMU rotate at six position with 12 times of rotation under condition that accurate rotary platform is not pointed at north.

This is a live demarcating method for the fiber optic gyro inertial measurement Unit. This invention relates to a live demarcating method of the error coefficient of the fiber optic gyro inertial measurement Unit. This method can accurately demarcate 15 error coefficients such as the gyro calibration factor, normal value drift, erection error and the normal value bias through FIMU 12 whirl at six different positions without accurate rotating floor. This invention has such merits as high accuracy, simple operation which not only improves the working accuracy of FIMU but also improves the set efficiency.

The invention provides a photosensitive drum drive assembly, a photosensitive drum having the drive assembly and a processing cartridge. The photosensitive drum drive assembly comprises a gear capable of being tightly mounted on one end of a drum body, and an axial adjusting assembly capable of making reciprocating movement relative to the gear along the axial direction of the gear, wherein the axial adjusting assembly includes a driving force receiving head capable of being matched with a driving force output head, a driving lever and a shift pin; one end of the driving lever is inserted into the gear along the axial direction; the driving force receiving head is fixed on the outer end of the driving lever and is located outside the gear; the shift pin is fixed on a portion of the driving lever located in the gear; and a stop section capable of being matched with the shift pin to prevent the driving lever from rotating relative to the gear is arranged in the gear. According to the invention, the service life of a motor, a motor transmission gear and the driving force output head of an imaging apparatus can be prolonged, and the use accuracy and the service life of the inner surface of a round hole on the sidewall of the processing cartridge and the outer surface of a shaft of the photosensitive drum drive assembly can be improved.

The invention provides a calibration method of a laser strapdown inertial navigation system on a horizontal three-axis rotary table, and belongs to the field of inertial instrument testing. The methodcomprises the following steps: firstly, placing a laser strapdown inertial navigation system on a horizontal three-axis turntable for initial alignment; secondly, entering a navigation state after alignment, and performing a biaxial position uniaxial speed rolling method by using a horizontal three-axis turntable; and finally, standing for 10 seconds and recording a navigation output speed errorafter the completion of each rotation; then, carrying out quadratic polynomial fitting on the speed error recorded each time with respect to navigation time to obtain an observed quantity, and identifying 21 error parameters of scale factors, zero offset and installation error angles of an accelerometer and a gyroscope in an IMU by using a least square method. Compared with a common calibration method of the IMU, the method not only solves the decoupling problem of the installation error angle in IMU system-level calibration, but also effectively inhibits the influence of the error of the inertial navigation test equipment on the calibration precision of the IMU, and can calibrate the IMU error parameter with higher precision without providing accurate attitude information by a rotary table.

A three-frame four-axis inertial platform error calibration method based on a navigation datum system comprises the following steps: with an X accelerometer input shaft as a datum axis, establishing a datum coordinate system OXYZ calibrated by a platform system; based on the datum coordinate system, establishing a platform system accelerometer output error model including an accelerometer installation error, a gyroscope drift error model and a frame angle output error model; and then according to the above three models, completing a calibration work of a three-frame four-axis inertial platform. Relying on a high-precision accelerometer on the platform, the navigation method is adopted to achieve self-calibration, and thus the calibration method is greatly simplified, the calibration cost is reduced, and the calibration accuracy is improved.

The invention belongs to the technical field of automatic processing, in particular to a basket-type automatic loading and unloading machine tool positioned outside the machine, which consists of a processing area, a loading area, a loading area and a handling manipulator. The left and right sides of the area are separated from the processing area by an automatic protective door; the loading area includes a loading basket, a loading and handling device and an automatic positioning device. The basket and the automatic positioning device move back and forth; the handling manipulator is set above the loading area, processing area and unloading area through the truss, and can move left and right between the loading area and the unloading area along the truss. The automatic loading and unloading, material preparation and processing of the present invention are completely separated without interfering with each other. The workpiece positioning and machine tool processing can be carried out at the same time, which greatly improves the production efficiency; at the same time, the internal structure of the machine tool is simple and easy to observe, and can ensure that the positioning fixture is not damaged by cutting fluid , improve service life and accuracy retention.

The invention provides a method and a device for estimating line-of-sight angle zero error by using an active radar seeker. The method comprises the steps of: calculating inertial navigation accordingto signals collected in real time by an inertial measurement unit in strap-down inertial navigation system to obtain flight path information of a missile in the strap-down inertial navigation system;in a case that every preset time is a sampling point, collecting beam signals during the search, interception and tracking of a target point by the active radar seeker, and calculating a first ballistic target line-of-sight angle of the missile relative to the target point in real time; collecting output data of a gyro and an accelerometer in the inertial measurement unit at each sampling point,and calculating a second ballistic target line-of-sight angle of the missile relative to the target point in real time according to the strap-down inertial navigation system principle; establishing astate equation, wherein the state variables in the state equation comprises the line-of-sight angle zero error; establishing a observation equation by using the ballistic target line-of-sight angle based on a observed value of the second ballistic target line-of-sight angle as observed quantity; and estimating the line-of-sight angle zero error according to a Kalman filtering method based on the state equation and the observation equation.

The invention relates to a linear guide rail pair structure with the high dust prevention performance. The linear guide rail pair structure with the high dust prevention performance comprises a guide rail, a sliding block, rolling bodies and rolling body retainers, wherein the sliding block is installed on the guide rail and can slide on the guide rail, and the rolling bodies and the rolling body retainers are arranged between the guide rail and the sliding block. The linear guide rail pair structure with the high dust prevention performance is characterized in that the front side and the rear side of the sliding block in the moving direction are respectively provided with an end face double-lip scrap scraping plate made of elastic wear-resistant materials. Each end face double-lip scrap scraping plate is provided with a double-lip scrap scraping hole corresponding to the guide rail in shape, the orifice of each double-lip scrap scraping hole is provided with two lips, and each lip is of an inclined tongue structure with the tongue tip outwards. A linear guide rail pair has the high dust prevention structure and advantages. The two novel metal retainers are installed for the guide rail and the rolling bodies of the sliding block and have the advantages of being high in rigidity, free of backlashes, high in reversible speed and the like.

The invention belongs to the technical field of spinning formation, and provides inner spinning equipment. The inner spinning equipment comprises a spinning machine tool body, a core mold, an inner spinning module with a rotating wheel, a first rotating wheel arm and a lateral slide frame, an inner spinning module longitudinal feeding mechanism, a transverse feeding mechanism, a balance wheel mechanism and a pressing ring; one end of the core mold is connected with a main shaft of the spinning machine tool, and is driven to rotate by the main shaft; one end of a blank is positioned in a cavityof the core mold, and the other end is connected to the other end of the core mold by the pressing ring; the first rotating wheel arm is L-shaped, one end is rotationally connected with the rotatingwheel, and the other end is connected with the lateral slide frame; the lateral slide frame is connected with the inner spinning module longitudinal feeding mechanism; the inner spinning module longitudinal feeding mechanism and the transverse feeding mechanism are positioned on one side of the main shaft; the inner spinning module longitudinal feeding mechanism is connected with the transverse feeding mechanism; and the balance wheel mechanism is positioned on the other side of the main shaft. Products produced by the inner spinning equipment have the characteristics of high precision, high yield, high production efficiency and the like, and are suitable for batch production.

The invention discloses a humidity detection method used for an air conditioner. The humidity detection method includes the following steps that operation modes of the air conditioner and continuous operation time after the air conditioner is started to operate are obtained, and the indoor environment temperature is detected; whether the operation modes of the air conditioner, the continuous operation time and indoor environment temperature meet preset conditions or not are judged; and if the judgment meets the preset conditions, a humidity sensor in the air conditioner is controlled to start to work to detect the relative humidity of the indoor environment. According to the humidity detection method used for the air conditioner, it can be avoided that the humidity sensor is in the working state all the time, and the service life of the humidity sensor can be prolonged. The invention further discloses a humidity detection device used for the air conditioner and the air conditioner with the humidity detection device.

The invention relates to a three-dimensional measurement accelerometer error non-singularity estimation method in an external field environment, in particular to a three-dimensional accelerometer error non-singularity estimation method in a field or an external field environment, wherein no special devices are needed. According to the method, first, all posture information needing to be collected for estimating the error of a three-dimensional accelerometer in an external field is determined; second, an accelerometer error model is built, and unknown parameters needing to be estimated are made to be clear; third, the unknown parameter estimation problem of the three-dimensional accelerometer error model is converted into a fitting problem of geometric model parameters of an ellipsoid; fourth, in parameter estimation of the three-dimensional accelerometer error model, an ellipsoid fitting algorithm avoiding singular points is adopted; fifth, an ellipsoid correcting model is adopted in parameter estimation of the three-dimensional accelerometer error model, and the problem that scale factors and installation error matrixes are not unique is solved. The three-dimensional measurement accelerometer error non-singularity estimation method is applicable to systems such as a small unmanned aerial vehicle, a robot and a handheld terminal with a low-cost, small-size and low-parameter-stability accelerometer as a sensor.