126results about How to "Ensure high precision requirements" patented technology

The invention relates to a digital loudspeaker drive method and a device based on quaternary code dynamic mismatch reshaping. The method comprises the steps of (1) conducting input format conversion, (2) conducting multi-bit sigma to delta modulation, (3) conducting thermometer code conversion, (4) conducting dynamic mismatch reshaping processing, (5) conducting channel data combination and mapping coding, (6) controlling metal-oxide-semiconductor field effect transistor (MOSFET) pipe of a full-bridge power amplifier network to conduct opening and closing status switching, and driving a digitalized loudspeaker load to produce sound. The device comprises a sound source (1), a digital format converter (2), a multi-bit sigma to delta modulator (3), a thermometer coder (4), a dynamic mismatch reshaper (5), a channel data combiner (6), a mapping coder (7), a multi-channel digital amplifier (8) and the digitalized loudspeaker load (9). The units are sequentially connected in order. According to the digital loudspeaker drive method and the device based on quaternary code dynamic mismatch reshaping, use efficiency of an amplifier pipe and the load is improved, development periods and hardware implementation cost are saved, and good immunity is provided for frequency response deviation of digital channels.

The invention discloses a master-slave type plastic spraying robot. The master-slave type plastic spraying robot consists of an X direction traversing rail component, a direct current motor, a Z direction lifting rail component, a cross arm, a stepping motor, a wrist part and a clamping part. The master-slave type follow-up plastic spraying robot consists of a master hand and a slave hand, wherein the master hand acquires signals of an operator and sends the signals to the slave hand, and the slave hand executes corresponding actions according to a master hand instruction. The mechanical part of a slave machine is provided with a rectangular coordinate type mechanical hand, a robot body part transmits movement by using screws and nuts, and the wrist part is driven by the stepping motor, is accurately positioned, can be arbitrarily raised and put down within a range of 180 DEG and can spray at multiple angles. The core of a control part realizes dual-machine communication by using a singlechip, and angle sensors are arranged in the robot body and the wrist part to feed the movement information of the slave machine back to a master machine.

The invention discloses a hinged mounting base on a 100% modern city tramcar. The hinged mounting base comprises an upper panel, a lower panel, a connecting rib plate, a rear block plate and a base, wherein the connecting rib plate is respectively connected to the upper panel, the lower panel and the rear block plate in a welding manner; the upper panel and the lower panel are welded on the rear block plate; the rear block plate is welded on the base; a hole for riveting is formed in the base. The hinged mounting base can be applied to installation of an upper hinge device of a 100% low-floor tramcar. The connection mode of the hinged mounting base and a car body is a riveting manner, so that not only is the hinged mounting base not limited by a roof end part material, but also the hinged mounting base can be conveniently repaired and replaced after being damaged. The hinged mounting base is welded by a high-strength carbon steel material, so that the hinged mounting base has enough strength and rigidity, and is especially applicable to local reinforcement on the hinged part on an aluminum alloy car body, the strength index of the overall car body is met, the weight of the car body is reduced, and the hinged mounting base has significant advantages of simple structure, reliable performance, good repairability and the like, and is convenient to assemble.

The invention discloses a flip box automatic production line and a production method thereof. The flip box automatic production line comprises, arranged according to process sequence, a bottom box producing module, a cover producing module and an upper cover and bottom box combining module. The production method includes 1, automatically forming a bottom box and packaging with paper; 2, automatically forming an upper cover and packaging with paper; 3, combining the bottom box and the upper cover to produce a finished product. The flip box automatic production line and the production method thereof have the advantages that producing efficiency is improved greatly, and labor investment is reduced.

The invention belongs to a resin-based composite material molding technology, and relates to a mold for integrally molding a J-shaped reinforced composite material wall plate. The mold provided by the invention comprises an appearance mold 1, a positioning block 2, an upper flange forming mold 3, a limiting mold 4, a lower flange forming mold 5, and an auxiliary mold 6. According to the invention, the appearance mold 1 is adopted as a basis, and the positioning block 2, the upper flange forming mold 3 and the limiting mold 4 are positioned sequentially. Through the controlling over position precision of the assembled upper flange forming mold 3 and the assembled limiting mold 4, precision of the upper flange appearance surface of the J-shaped reinforcing rib and axis position precision of the reinforcing rib are ensured. Therefore, mold manufacturing cost is reduced, and manufacturing cycle is shortened.

The invention discloses a twelve-point support based vertical launching platform attitude leveling control method. The method comprises the steps of firstly building a mathematical model of a twelve-point supported vertical launching platform attitude leveling system, adjusting the position through a position error control based attitude leveling method, adjusting the angle through an angle error control based attitude leveling method, and finally carrying out joint simulation on the vertical launching platform attitude leveling system. According to the invention, a control algorithm applicable to twelve-point leveling is explored on the basis of four-point leveling. The algorithm adopts an idea of block leveling and converts complex multi-point leveling into three-point or four-point leveling which is easy to implement, ideal simulation effects in both leveling precision and leveling time are acquired, and excellent servo control performance of a launching platform is ensured.

The invention provides an infrastructure structure deformation monitoring method based on Beidou high-precision positioning. The method comprises four steps of Beidou satellite signal data acquisition, wireless network communication and data analysis, Beidou real-time processing and Beidou post-processing. Beidou real-time processing adopts Kalman filtering to update and estimate parameters in real time to obtain a real-time calculation result, and Beidou post-processing adopts double Kalman filtering to process the real-time calculation result and historical result data. A Beidou high-precision positioning equipment terminal is used, Beidou original data can be collected in real time, and then calculation is performed through a real-time and static post-processing algorithm and a processing flow so that real-time and post-millimeter-level deformation monitoring of infrastructure structures (such as high-rise buildings, dams, mountains, bridges and electric towers) can be realized.

The invention discloses a gas filling bottle welding rotating device and a working method thereof. The device comprises a machine frame, a driving rotating body, a driven rotating body, clamping sleeves and a motor and the like, wherein the driving rotating body and the driven rotating body can move relatively, and the clamping sleeves are installed on the driving rotating body and the driven rotating body. The working method of the gas filling bottle welding rotating device comprises the steps of feeding, clamping, rotation and blanking and the like. The gas filling bottle welding rotating device can greatly improve gas filling bottle production efficiency and reduce manpower resource investment.

The invention discloses a posture compensation method in case of mismatched side-swing push-broom velocity in imaging of an agile satellite. For the limitation (only the drift action caused by auto-rotation of the earth is considered) of the posture compensation method in the traditional imaging mode (the pointing direction of the satellite to the ground is fixed), the drift angle calculation formula is obtained under the mode according to the track posture parameter by analyzing the reason for the generation of the drift angle under the imaging mode (namely the condition that the substellar point velocity is mismatched with the push-broom velocity of a camera, and the pointing direction of the posture at the moment to the earth changes continuously) that the pointing direction of the side-swing push-broom posture of the satellite to the earth changes continuously, considering the drift action of the imaging from the three aspects such as orbital motion, auto-rotation of the earth andthe push-broom velocity of a camera and combining the basic definition of the drift angle. On the basis, by combination of the basic principle of TDICCD (time delay integration charged coupling device) imaging and the yawing control principle, the satellite posture compensation method is given, so that the imaging requirement for side-swing push and broom of the agile satellite can be met.

The invention discloses a gas filling bottle welding swinging frame and a working method thereof. The gas filling bottle welding swinging frame is fixed on a machine frame through an L-shaped connecting piece, the L-shaped connecting piece is fixedly connected with a translation base plate, the translation base plate is provided with a movable table driven by a screw rod and a screw rod nut, and a hand wheel is installed at the end of the screw rod. The vertical column is fixedly installed on the movable table, a clamping sleeve is installed on the column, a beam is installed on the clamping sleeve, a swing device is installed at the end of the beam, and a welding gun is fixedly clamped on the swing device. The working method comprises the steps of feeding, welding and blanking and the like. The gas filling bottle welding swinging frame can greatly improve gas filling bottle production efficiency and reduce manpower resource investment.

The invention discloses a workpiece micro shock excitation device and a workpiece micro shock excitation method for vibration machining, in order to solve the problem that no simple and practical workpiece micro shock excitation device or workpiece micro shock excitation method for the vibration machining exists at present. The workpiece micro shock excitation device is characterized in that a servo motor drives an eccentric shaft; an eccentric groove at the bottom of a vibration table is tangent with an eccentric wheel of the eccentric shaft; n pin rollers are equally divided into two groups to be arranged on the two sides of the eccentric shaft; two sliding blocks are arranged on the two sides of the bottom of the vibration table; and the top and the bottom of each sliding block correspond to one group of pin rollers to form a rolling pair. The workpiece micro shock excitation method for the vibration machining comprises the steps as follows: a workpiece is arranged at the top of a three-directional force sensor and clamped by a fixture; the servo motor drives the eccentric shaft to excite the vibration table to vibrate; and a monitoring system monitors and optimizes workpiece vibration cutting, and controls the servo motor to adjust the vibration frequency of the workpiece. According to the workpiece micro shock excitation device and the workpiece micro shock excitation method for the vibration machining, workpiece micro shock excitation machining can be realized efficiently, and the micro displacement vibration frequency and the cutting carrying capacity of the workpiece are monitored, detected and diagnosed in real time.

The invention relates to a damage control method for ultraprecision turning of a crystal material. The damage control method for ultraprecision turning of the crystal material comprises the steps that a multi-layer amorphous system is designed according to the to-be-machined material and cutting parameters, the number, the depth and the thickness of amorphous layers are determined, the ion irradiation process is simulated through the Monte Carlo numerical method, and an ion source, implantation energy and the dosage combination are worked out; ion irradiation is conducted through an ion implanter or a high-energy accelerator according to the worked-out implantation parameters, and a multi-layer amorphous structure in the material is prepared; the allowable maximum feed rate for turning is determined according to the arc radius of a tool, the cutting depth, geometrical parameters of the amorphous layers, and the brittleness-plasticity conversion thickness of the workpiece material; and planar machining is conducted on a modified crystal according to the turning parameters.

The invention discloses a method for estimating the pose of a refueling cover of an automatic refueling robot, and is applied to the technical field of automatic refueling of a fuel vehicle. A scheme of combining passive binocular stereoscopic vision and visual servo is provided, wherein the passive binocular stereoscopic vision is used for sensing environmental information, and the pose information of a refueling cover grabbing point is obtained by using a stereoscopic matching technology; in addition, a visual servo method is added; a passive binocular camera is responsible for a coarse positioning part of an early-stage perception task, that is, the process of calculating pose information of the grabbing point through a binocular stereo matching method; and visual servo carries out fine positioning on the basis of coarse positioning, that is, the process of guiding a mechanical arm to move to the position of the grabbing point through a visual servo technology, so that it is guaranteed that the mechanical arm moves to the refueling cover grabbing point position, the refueling cover is unscrewed subsequently, and a refueling gun stretches into the refueling cover for refueling.

An accurate powder compacting machine with prestressed frame is composed of enclosed frame-type main body, main cylinder assembly and bottom cylinder assembly. Said main cylinder assembly installed at upper part of main body consists of main cylinder, and nested cylinder fixed to the top of piston rod of main cylinder. Its advantages are less tensional deformation, high rigidity, and high machining accuracy. It is suitable for shaping the workpiece with complex shape and central hole.

The invention relates to a combined mold for processing gas thrust bearing bump foil of an elastic foil sheet, which comprises a bump foil processing mold ring 1, a bump foil processing mold ring 2, a bump foil processing mold ring 3, a bump foil processing mold ring 4, a bump foil processing mold ring 5, a bump foil processing mold ring 6 and a bump foil processing mold ring 7 which are nested and combined, wherein the bump foil processing mold rings (1-7) are connected together through a positioning cylinder 9, and bolts 8 are arranged at two ends of the positioning cylinder 9. A new combined mold structure can be formed by rotating one of the mold rings. The invention has the characteristics of compact structure, combined processing, low cost and high precision.

The invention discloses a turning fixture for once clamping processing of a valve, wherein bottom outer side walls of a support block (6) and an angle iron module (1) are horizontal; a bottom central hole of the angle iron module is tightly matched with the central hole of the support block; a T-shaped bolt (5) is placed in the support block (6) through an opening slot, passes through two throughholes on the bottom of the angle iron module (1) and then is fixed by a locking nut (2); a correcting block which is leveled is fixed on the support block (6) through a bolt (4); bottoms of two hanging bolts (10) are respectively arranged in the support block (6); top mounting pressing blocks (11) of the two hanging bolts (10) are fixed by hanging nuts (12); and a rotary spindle (8) is connected to the central hole of the support block (6) and the central hole of the angle iron module (1) through a gasket (7), thereby integrally forming the turning fixture. By using the turning fixture, the threads and openings at two ends of the valve can be once fixed and successfully processed by using a common lathe or a numeric control lathe, the cost is lowered, the processing efficiency is increased, and the problem of difficult processing of similar parts is thoroughly solved.

The invention provides a dual-servo motor control device for a flat plate type digital ink-jetting printing machine. Two high-precision servo motors 1 and 2 are adopted, wherein the servo motor 1 is used for controlling motions of a nozzle group in a width direction of a printed textile, and the servo motor 2 is used for controlling motions of a machine head subassembly in a length direction of the printed textile. Furthermore, the servo motor 2 is connected with the servo motor 1 by a signal converting device, so that the synchronous intermittent movement which is complementary in time of the servo motor 1 and the servo motor 2 is accurately traced. Therefore, the heights of the motions of the machine head subassembly are coordinated and consistent, and the high-precision requirement in printing can be effectively ensured. The device can be directly applied to the ordinary flat plate type digital ink-jetting printing machine and has the advantages of convenience for entire installation and high cost performance.

The invention discloses a high precision lifting device which is connected with a motor and comprises a slide plate, a steel ball belt, a lead screw, an upright column and a nut block, wherein the lead screw is fixed on the upright column, the nut block is fixed on the slide plate and is matched with the lead screw, the steel ball belt is arranged between the slide plate and the upright column, and the motor is connected with the lead screw. In the invention, the steel ball belt inlaid with a steel ball is adopted to replace a bracket protected by a guide rail to realize rolling sliding so that the friction is greatly reduced, and the adopted steel ball also has high quality, strong strength and high precision and is one in hundred, thereby the high precision requirements on the motion of the slide plate are met and the stability of lifting motion is greatly improved at the same time.