122results about How to "Fine-tuning" patented technology

The invention discloses a capsule endoscope magnetic control navigation device for medical treatment. The capsule endoscope magnetic control navigation device for medical treatment is used for actively controlling movement of capsules in the use process of a capsule endoscope, so that the stomach wall can be completely and effectively detected. The device comprises a hybrid magnetic field generator, a multi-DOF (multi-degree of freedom) motion mechanism and a controller, wherein the multi-DOF motion mechanism is used for carrying the hybrid magnetic field generator to move in a detection area so as to adjust spatial distribution of a magnetic field; the hybrid magnetic field generator comprises a permanent magnet and an electromagnetic coil, can generate a strong magnetic field used for guiding the capsules to move and can adjust the intensity of the magnetic field to a certain degree according to control signals; the controller controls the multi-DOF motion mechanism to move by receiving a control instruction of an operator and feedback signals of a sensor and controls coil current of the hybrid magnetic field generator. The device can guide the capsule endoscope to move in the stomach of a human body in the fixed modes including floating, fixed point floating, posture adjustment and the like, and accordingly, the capsule endoscope can automatically and completely detect the whole stomach wall.

Disclosed is an electromagnetic wave transmission device with regulative and controllable magnetic field based on sub-monolayer wavelength metal grating; the device comprises a sub-monolayer wavelength metal grating and magnetoactive medium filled in the slit of the sub-monolayer metal grating; the metal part of the device and the magnetoactive medium have the same thickness, the thickness at least meets and supports the lowest-level Fabry-Perot cavity resonance demand of the designed work wavelength in the grating slit; the period and slit of the grating are shorter than the wavelength of the electromagnetic wave. By changing the size of the additional magnetic field, the propagation constant of the waveguide mode in the metal grating slit can be regulated to change the electromagnetic transmission characteristic of the device and realize the purpose of initial regulation of polarization-independent electromagnetic wave transmission spectrum and the electromagnetic wave transmission spectrum magnetic field.

The invention relates to an individual abutment and a manufacturing method thereof. The manufacturing method comprises the following steps: carrying out reverse modeling through CT scanning and carrying out parametrization design on a model through Unigraphics NX, implementing precise repairing on the abutment model, carrying out simulation analysis on the abutment model by virtue of a finite element analysis method, and implementing model optimization design according to a finite element stress analysis result so as to meet the attributes of an abutment material; carrying out three-dimensional hierarchical slicing treatment on the abutment model meeting the attributes of the abutment material, and promoting the generation of a corresponding path file; and according to the path file, reasonably controlling the parameters of selective laser melting equipment and molding so as to obtain the individual abutment. The manufacturing method disclosed by the invention can be used for effectively guaranteeing the accuracy of stress direction and size of the abutment as well as the precision of molding, and the manufactured individual abutment can fit to jaw characteristics of a patient more precisely compared with the prior art, so that comfort in use is improved and the service life of the abutment is prolonged.

The invention relates to the field of electro-acoustic technology, and particularly relates to a DSP audio digital signal processing system and a method. The DSP audio digital signal processing system comprises an audio analog signal input interface module, a DSP digital signal processing module, an audio analog signal output interface module, a single chip microcomputer micro control module, a display module and a user operation interface module; the display module, the user operation interface module and the DSP digital signal processing module are in signal connection with the single chip microcomputer micro control module; and the audio analog signal input interface module and the audio analog signal output interface module are in signal connection with the DSP digital signal processing module. When the system and the method of the invention are adopted, the traditional audio power amplifier prestage for pure analog signal processing can be changed into digital prestage with the DSP digital signal processing function, and high speed, high efficiency and flexibility of digital signal processing are counted.

The invention provides a harmonic reducer with a short barrel-shaped flexible wheel. A wave generator is arranged in an inner hole of the flexible wheel (18), and outer teeth of the flexible wheel (18) are engaged with inner teeth of a rigid wheel (6); the rigid wheel (6) is fixedly connected to a spigot inner hole of a housing (16) through a pin (8), a spring gasket (19) and a bolt (20); the flexible wheel (18) and a low-speed shaft (15) are fixedly connected together through a bolt (10) and a spring gasket (11); the wave generator and a high-speed shaft (1) are fixedly connected together through a key (9), and are axially positioned through a shaft elastic retainer ring (3); finally, a bearing (2) and a bearing (12) are arranged at the two ends of the high-speed shaft (1) respectively, so that the wave generator realizes axial positioning motion and radial positioning motion; the high-speed shaft (1) and the low-speed shaft (15) realize linear coaxial transmission. The harmonic reducer disclosed by the invention is reduced in size and weight, and can be used for realizing relatively large torque transmission output.

The invention discloses an automatic coupling device from an optical fiber laser device to a single mode optical fiber. An input end of a first optical fiber collimator is connected with an output end of the optical fiber laser device; a collimating laser beam is output to a telescope system composed of a first convex lens and a second convex lens fixed to a one-dimensional piezoelectric ceramic translation table, and the collimating laser beam is coupled to the single mode optical fiber through a second optical fiber collimator arranged on a two-dimensional piezoelectric ceramic translation table; the collimating laser beam is divided into two paths through a single mode optical fiber coupler, wherein one path is converted into an electric signal through a photoelectric detector, the electric signal enters into a controller, the controller sends a control signal according to a value of the photoelectric signal to control a driver to drive a one-dimensional piezoelectric ceramic and a two-dimensional piezoelectric ceramic so as to form a closed-loop control system, and the other path is output for use. The automatic coupling device has the advantages of high structural coupling efficiency, self-adaptive temperature, external-environment-change such as vibration and the like resistance, reliable running, low fault rate and the like. The automatic coupling device is widely applied to the fields of precise light spectrum, quantum optics and others using the optical fiber laser device.

The invention relates to a flexible hydraulic jaw. A double-acting hydraulic cylinder is arranged in the middle of a clamp body; the top end of a piston of the double-acting hydraulic cylinder is movably connected with two symmetrically distributed guide rails through an ejector block; the inner sides of the two guide rails are provided with wedged sliding blocks respectively; clamping pads are arranged on the inner side surfaces of the sliding blocks; the clamp body is connected with wedged fixing blocks through flat keys; the inclined surfaces of the fixing blocks are matched with the inclined surfaces of the sliding blocks; two parallel lugs are arranged on the front surface and the rear surface of the clamp body respectively; and a pin shaft is arranged between the two lugs on the rear surface. The flexible hydraulic jaw can be adjusted into shapes such as a linear shape, a curved shape and the like according to the shape of the section of a part on the basis of a stretching molding requirement, and has stretching molding functions of skin parts with stretching molding reverse curvatures and large curvature radiuses, and large-section profile parts.

The invention discloses a precision fine adjustment device, and particularly relates to a differential screw fine adjustment device. The device consists of a pedestal, a guide rod, a guide plate, a screw rod, a bolt and an adjusting screw sleeve, wherein a threaded through-hole and a light through-hole are formed on the pedestal and penetrate the pedestal in the up-down direction, the adjusting screw sleeve has a sheath structure, an external thread is formed on the outer cylindrical surface of the adjusting screw sleeve, an internal thread is formed on the inner cylindrical surface of the adjusting screw sleeve, the external thread is in threaded connection with the threaded through-hole to form a pair of screw pairs, the internal thread on the adjusting screw sleeve is in threaded connection with the screw rod, the internal thread and the external thread of the adjusting screw sleeve have the same rotation direction but have different pitches, and the screw difference of the two screw pairs is the fine adjustment distance resulting from one rotation of the adjusting screw sleeve. The differential screw fine adjustment device has simple structure and reasonable design, is easy to operate, can achieve the effect of precision fine-adjustment because of the small real linear displacement caused by differential motion, provides convenience for differential fine adjustment, ensures reliable position fixation and high precision, and has a wide application range.

The invention discloses an ecological restoration space identification method and system based on an ecosystem service perspective, and the method comprises the steps: selecting ecosystem services taking water conservation, wind prevention and sand stabilization, soil maintenance and carbon fixation as the leading, and obtaining the ecosystem service evaluation amount of an evaluation time periodof a specified region; dividing the designated area into a plurality of grids, and determining the ecosystem service reverse conversion probability and loss level of each grid according to the ecosystem service evaluation amount of each evaluation time period, thereby forming an ecological risk evaluation result of each grid; obtaining the land degradation evaluation result of each grid based on the trend test analysis of the year-by-year normalized vegetation index (NDVI) of the evaluation time period; and averaging the ecological risk evaluation result and the land degradation evaluation result of each grid to obtain an ecological restoration priority evaluation result of the grid. According to the method, the key area of the ecological restoration project can be identified, and an ecological protection restoration scheme can be finely formulated.

The present invention relates to a thick-film laser trimming method and trimming system based on nano-silver paste. The method prepares nano-silver paste suitable for tuning fork gyro characteristics through a new type of formula, and utilizes screen printing thick-film manufacturing technology to pre-process Deposit nano-silver paste masses at the end of the fork arm of the tuning fork, and use laser trimming technology to selectively remove the sintered nano-silver paste at the end of the tuning fork. Efficient and accurate on-line detection of the vibration form and frequency interval of the base, and the fast and accurate adjustment of the mechanical coupling error and frequency of the tuning fork gyroscope. This method combines nano-slurry production technology, micro-machining Combining with mature screen printing technology, the design method is reasonable and feasible, and the purpose of further improving the precision of the tuning fork gyroscope and perfecting the performance index of the gyroscope is achieved.

The invention belongs to the production field of musical instruments, and particularly relates to a combined-type erhu tuning nut. Erhu is an attractive stringed national instrument and not only can express the deep and miserable scene, but also can paint a state of magnificent momentum, the tone of erhu is close to the human voice and high in emotional rendering force. Since the structure of erhu is simple, and the production method is relatively extensive, inconvenience can be brought to the playing, and a series of problems occur on the aspects such as shifting of the nut, replacement of the tone, intonation calibration, out of tune and the like when a melody of different pitches is played. The intonation calibration of erhu is critical for the playing effect. The combined-type erhu tuning nut integrates a function for limiting the oscillation string length and calibrating the tonality, and the tonality of erhu can be conveniently fixed. By adopting a double-sided adhesive band, the tuning nut is fixed by the double-sided adhesive band in a tying manner, so that the nut is simple and convenient to move; the tuned erhu is deep in low pitch, clear and smooth in medium pitch and clear and cool in high pitch, so that the quality of the erhu - the national treasure can be greatly improved.

The invention relates to a dummy bar head special for a chamfered mold for continuous casting slabs and belongs to the technical field of steelmaking-continuous casting. The dummy bar head comprises a head segment (1), a shim (2), and chamfered plates (3). Chamfer of the chamfered plates (3) corresponds to that of the mould. Mature industrial application of multi-type and multi-specification products is achieved. Corner cross cracks of continuous casting slabs are eliminated, and corner longitudinal cracks are also eliminated. The dummy bar head special for the chamfered mold is designed to adapt to the use of the chamfered mold. The dummy bar head is simple and highly applicable, the thickness of the adaptable continuous casting slabs ranges from 130mm to 420mm, and the width of the adaptable continuous casting slabs ranges from 1500mm to 3000mm. The dummy bar head is reliable and stable and is simple in overall structure, convenient to demount and maintain and easy to replace.

The invention relates to a pair of reset pliers for spreading and lifting lumbar vertebral bodies, which is used for the reset of a vertebral body and the fusion and fixation of parallel vertebral bodies so as to reset the normal relation of the sagittal sequence and force line of a vertebral column. The head part of a lifting handle I and the head part of a closing handle II rotate around a rivet so as to form the rotation fit of a plier body, a threaded rod penetrates through a through hole on the side surface of the tail part of the closing handle II to form buckled movable fit with a triangular clamp groove on the tail part of the lifting handle I, a nut is embedded in the through hole of the closing handle II and forms spiral movable fit with the threaded rod, the lifting handle I is in a hollow tube slot structure, a telescopic lifting bar penetrates out of the head part of the lifting handle I and forms a telescopic lifting nozzle with the jaws of the head part of the closing handle II, and the tail part of the telescopic lifting bar penetrates through a spiral handle. The pair of reset pliers has the advantages that on the one hand, the purpose of lateral and longitudinal vertebral body resetting which is required by inter-lumbar vertebral body surgery is realized; and on the other hand, the pair of reset pliers for spreading and lifting the lumbar vertebral bodies can satisfy the surgical requirements of different vertebral damages, not only can satisfy large lifting motions, but also can accurately and finely adjust the vertebral column of a local sick body.

The invention relates to a device and method for automatically suppressing the milling vibration of a thin-walled rotating body. The device mainly comprises a base, a main shaft, a supporting plate and a vibration damping block and is characterized in that a fixture is fixed to a machine tool through the edge of the base; quick-release pressure plates are evenly distributed at the outer side of the base; the main shaft is arranged at the center of the surface of the base; a rectangular end of a connecting block is fixed to the inner side of the supporting plate by screws, and the cylindrical end of the connecting block is connected to the main shaft through an electric push rod assembly; the electric push rod assembly comprises the front end of a push rod, a push rod sleeve, a motor, a driving gear, an intermediate gear, a driven gear, a lead screw nut and a lead screw; a plurality of rubber shock absorbers are arranged between the supporting plate and the vibration damping block; thecambered surface of the vibration damping block is matched with a workpiece; a roller with a bearing is arranged at the bottom of the vibration damping block; a roller spindle is locked by using the fixed block; and idler wheels are arranged on the supporting plate. The device and method can automatically suppress the milling vibration in the process of processing the thin-walled rotating body, meets the processing quality requirement while satisfying the processing efficiency, and has the characteristics of automation and high precision.

A pulse generator includes a phase-locked loop, a first pulse width modulator, a second pulse width modulator, a dual-loop delay phase-locked loop, and an integrator, wherein the phase-locked loop isconnected with the first pulse width modulator and the second pulse width modulator, respectively, so that the first pulse width modulator and the second pulse width modulator digitally modulate the positive and negative edges of the output signal of the phase-locked loop, respectively, to realize coarse adjustment of the pulse width. The integrator is connected with the second pulse width modulator for modulating the negative edge of the input signal of the second pulse width modulator to realize fine adjustment of the pulse width, and then the output signal of the pulse width modulator is fed back to the phase-locked loop through the dual-loop delay phase-locked loop to form a closed loop so as to synchronize with the input signal and output the pulse signal. The duty cycle of the pulsesignal has a larger output range and a higher resolution. The present application also discloses a pulse generation method and an electronic device.

The invention discloses a sleeve barrel structure of a horizontal type numerical control boring-milling machine. A sleeve barrel is installed in a fixed sleeve, the inside of the sleeve barrel is provided with a boring bar, a balancing sleeve is arranged between the sleeve barrel and the fixed sleeve and is connected with the sleeve barrel by double keys, and the double keys are fixed on the sleeve barrel by screws; and both ends of the balancing sleeve are respectively provided with duplex bearings, the duplex bearings are spaced by a bearing sleeve, and the bearing sleeve is sleeved at the outside of the balancing sleeve. The invention has the beneficial effects that the balancing sleeve is additionally arranged and has the function of carrying out fine adjustment to an axle, and automatic centering is realized in the running process of the sleeve barrel, so that the effects of balancing and stability are achieved; and simultaneously, the vibration of a main shaft can be reduced, the rotary inertia of the main shaft is increased, and the processing precision of a boring-milling shaft is improved.

The invention provides a multiple-image system supporting device convenient to maintain and relates to the technical field of medical imaging, in particular to a multiple-image system maintaining device. The multiple-image system supporting device comprises a straight-line main guide rail for supporting a main frame in work and a straight-line maintenance guide rail used for maintenance, wherein the straight-line maintenance guide rail is detachably connected to one end of the straight-line main guide rail. The multiple-image system supporting device further comprises a sliding block which is simultaneously matched with the straight-line main guide rail and the maintenance guide rail. By enabling the main frame to be supported on the main guide rail through the sliding block matched with the main guide rail, normal work can be performed. When maintenance is required, the maintenance guide rail is connected to one end of the main guide rail, the main frame can slide from the main guide rail to the maintenance guide rail along with the sliding block, and an operation distance required for maintenance is achieved. When the maintenance is finished, the main frame is pushed back to the main guide rail, the maintenance guide rail is dismantled after the main frame is positioned, so that long-time ineffective occupying of ground area is avoided, accidental trip of staff is avoided, and maintenance of the maintenance guide rail is also facilitated.

The invention belongs to the field of manufacturing of musical instruments, and in particular provides an assembled multifunctional jack of an ehru. Ehru is a string-pulling type national instrument with unique charm, which produces a tone close to human voice, has a high emotional rendering force, can bring a deep and pathetic artistic conception and shows a majestic aura, however, ehru is simple in structure and extensive in manufacturing method, which are inconvenient to play and also cause a series troubles like offsetting of the jack, change in tone, calibration of intonation and out-of-tune during playing songs of different set tones. The assembled multifunctional jack of the ehru is a combined part that combines the functions of scale jiggling calibration, limiting of oscillation string length and quick modulation of the ehru; a tonometer is arranged on the multifunctional jack, a fine tuning mechanism is arranged in the middle of the multifunctional jack, a movable jack set is arranged below the multifunctional jack, so as to form a complete multifunctional jack. The assembled multifunctional jack of the ehru is convenient to play, the low pitch is forceful and deep, the medium pitch is bright and smooth, and the high pitch is clear and bright, and the quality of ehru that is the national treasure is improved.

The invention discloses an automatic flame scarfing device which comprises a gantry and a machine head, wherein the machine head comprises a base, a cantilever beam, a rotary arm, a blow-out mechanism, a servo driving mechanism and a detecting mechanism, wherein the base is slidably arranged on a cross beam of the gantry and performs to-and-fro motion in the X-axis direction of the gantry; the cantilever beam is slidably arranged on one side of the base and performs up-and-down motion in the Z-axis direction of the gantry; the rotary arm is slidably arranged at the bottom of the cantilever beam and performs to-and-fro motion in the Z-axis direction of the gantry; the blow-out mechanism is arranged at the bottom of the rotary arm; the servo driving mechanism is used for controlling fine adjustments of the base, the cantilever beam, the rotary arm and the blow-out mechanism; and the detecting mechanism is connected with the servo driving mechanism, and used for detecting a relative position between the blow-out mechanism and a workpiece. By adoption of such structural design, a flame spraying gun can be precisely and automatically positioned and fine adjusted under the drive of the servo driving mechanism and under the detection of the detecting mechanism, thereby effectively improving the production efficiency and reducing potential safety hazards.

The invention discloses a lens barrel adjusting structure and a 3D glasses device formed by the same. The lens barrel adjusting structure comprises a fixed support, a left eyepiece and a right eyepiece, wherein the upper ends of the left eyepiece and the right eyepiece are separately connected with transverse adjusting structures for adjusting the left eyepiece and the right eyepiece to move to and fro in the length direction of the fixed support; the left eyepiece and the right eyepiece are arranged below the fixed support at interval and movably connected with the fixed support; each transverse adjusting structure comprises a rotating wheel and a connecting rod which moves to and fro in the length direction of the fixed support, the connecting rod is hinged with an off-axis position of the rotating wheel, the connecting rod and the rotating wheel are respectively connected with the fixed support, and the connecting rod is fixedly connected with the left eyepiece or the right eyepiece. By rotating the rotating wheels of the transverse adjusting structures at the upper part inside the rear end of a shell to drive the connecting rods to rotate, the left eyepiece and the right eyepiece are moved more stably, so that fine adjustment can be realized, and the adjusting precision is higher; and the structure is simple and reliable.

The invention discloses a fine boring cutter and belongs to the field of machined cutters. The fine boring cutter comprises a round handle, a cutter body and a sliding sleeve shaft, wherein the round handle is inserted in a machine tool; a through hole is formed in the cutter body; a fine tuning device is arranged in the through hole; the sliding sleeve shaft is arranged at the other end of a driven adjusting screw and is movably connected with the driven adjusting screw through a fine tuning nut; a limiting structure is arranged at one end of the sliding sleeve shaft; the sliding sleeve shaft is fixedly connected with a blade bearing through the limiting structure. Compared with the prior art, a double-dial structure formed by combining a driving adjusting dial with a driven adjusting dial is adopted, has the maximum precision of 0.001 mm, and can carry out quick and precise fine tuning on the working radius of the fine boring cutter to realize the purpose of high precision fine tuning, so that the fine boring cutter has excellent market prospect and economic value.