39results about How to "For fine tuning" patented technology

The invention discloses an automatic accurate adjustment system for an instrument movement clearance. The automatic accurate adjustment system comprises a work table, a handpiece module, an engine base module, a shifting module, a laser displacement sensor module and a controller. The handpiece module comprises a cutter head and a cutter head drive mechanism; the shifting module comprises a shifting plate and a shifting plate drive mechanism; the laser displacement sensor module comprises a probe, a laser displacement sensor and a probe drive mechanism; the signal output end of the laser displacement sensor is connected with the controller; and the control ends of drive elements in the cutter head drive mechanism, the shifting plate drive mechanism and the probe drive mechanism are connected with the controller. A clearance between a lower bearing and a shaft tip in a measurement mechanism of an electrical measuring instrument to be adjusted is detected by using the shifting plate, the probe and the laser displacement sensor, an adjustment quantity is output by using the controller according to a detection signal, and axial displacement is generated by driving the lower bearing through the cutter head, so that the accurate adjustment of the clearance between the lower bearing and the shaft tip is realized. The automatic accurate adjustment system is short in machining period, low in cost and high in efficiency; and moreover, the batch uniformity and the stability of the accuracy can be improved.

The invention provides an external cavity tunable laser and a wavelength tuning method, and belongs to the technical field of lasers. The external cavity tunable laser comprises a semiconductor gain chip, a first collimating lens, a blazed grating and a reflector opposite to the blazed grating, wherein the semiconductor gain chip, the first collimating lens and the blazed grating are located on the same optical axis, and an included angle larger than 0 exists between the grating plane of the blazed grating and the optical axis. The semiconductor gain chip sequentially comprises a sampling grating region, a phase modulation region, a gain region, and a first electrode, a second electrode and a third electrode which respectively cover the sampling grating region, the phase modulation regionand the gain region from left to right. The blazed grating and the reflector are fixed on an electric or manual control mechanical structure. According to the invention, the large-range, rapid and fine tuning of the wavelength by the laser is realized, and the output wavelength can be narrowed.

The invention discloses a precision adjustment method of satellite-borne instrument equipment, and relates to the technical field of satellite assembly adjustment. The invention aims to solve the problem of low adjustment precision caused by incomplete consideration factors in the existing satellite final assembly process. According to the numerical values of an actual measurement matrix and a designed measurement matrix, the actual measurement global coordinates and the designed global coordinates of the gaskets are obtained, then a gasket adjustment equation is established, a constraint equation of a gasket plane is established according to the number of gaskets to form an overdetermined equation set and solve to obtain a gasket adjustment amount numerical value, and finally the gasket by utilizing the adjustment amount is adjusted.

The invention relates to a foldable objective image stitching grating pulse compressor and a stitching status diagnosis system. The foldable objective image stitching grating pulse compressor comprises four groups of stitching gratings and two foldable reflectors, wherein the first groups of stitching gratings and the second group of stitching gratings are parallel, the third group of stitching gratings and the fourth group of stitching gratings are parallel, and two pairs of parallel stitching gratings are symmetrically distributed up and down. The stitching status diagnosis system comprises two monitoring light sources and two observation devices, wherein each monitoring light source emits one beam of light, which is divided into two monitoring light beams, and four monitoring light beams are respectively received by the corresponding observation devices after passing through four stitching positions and form diffractive focal spots. The size of the compressor is reduced, the stitching deviation of the stitching gratings is reduced and the stitching status diagnosis system is simplified.

The invention discloses a narrow gap laser-electric arc hybrid welding gas shielding device and an adjusting method. The device comprises a main spraying nozzle assembly and a back-mounted auxiliary gas flat spraying nozzle assembly; the main spraying nozzle assembly comprises a main spraying nozzle outer barrel and a main spraying nozzle inner barrel, the main spraying nozzle outer barrel is of abullet-shaped spraying nozzle structure, and the front end is provided with a conic shape with a smooth convergence curve; and the back-mounted auxiliary gas flat spraying nozzle assembly comprises agas guide pipe quick insertion, a clamping block, an auxiliary gas connecting rod and a back-mounted auxiliary gas flat spraying nozzle. In the adjustment process, the main spraying nozzle inner barrel can move up and down in the welding gun axis direction, the back-mounted auxiliary gas flat spraying nozzle assembly can be adjusted to move up and down in the direction parallel to the welding gunaxis direction by releasing the clamping block, and stretchable adjustment of the distance between the main spraying nozzle and the workpiece surface and the distance between the back-mounted auxiliary gas flat spraying nozzle and the notch bottom is finally achieved in the multi-layer welding process. The narrow gap laser-electric arc hybrid welding gas shielding device is compact in structure,convenient to adjust and high in reliability, the hybrid welding adjusting efficiency can be obviously improved, and high-quality welding of large-thickness materials is achieved.

The invention discloses a gyro rotor mass center position accurate adjustment device and method based on an ultrasonic antifriction effect, and belongs to the field of small displacement adjustment of precision machinery. An ultrasonic transducer is added between an adjusting screw and a gyro clamp; in the adjusting process, the ultrasonic transducer transmits ultrasonic vibration to the adjusting screw; and at the moment, the adjusting screw has already been screwed into a rotor adjusting screw hole, so that the ultrasonic vibration can be transmitted to a gyro rotor through transmission of the adjusting screw to realize ultrasonic vibration between rotor contact surfaces. Transverse vibration between the contact surfaces can reach the ultrasonic antifriction effect, and besides, through axial rotation of the adjusting screw, accurate adjustment of gyro rotor mass center position can be realized under the condition of smaller friction force. The device and method can effectively reduce the friction force between the rotor and bearing contact surfaces, thereby reducing creeping phenomenon and improving adjusting precision and efficiency; and the device and method can be widely applied to the small displacement accurate adjustment process.

The invention discloses a precise stroke adjusting device. The precise stroke adjusting device comprises a pinion shaft system, an upper shaft system and a roller sliding block system, wherein the pinion shaft system comprises a servo motor and a pinion shaft which are connected with each other; a pinion is fixed on the pinion shaft; the upper shaft system comprises an upper shaft; a cam is fixed on the upper shaft; the upper shaft is provided with an eccentric bushing by a bearing; a large gear is fixed at the eccentric bushing; the large gear and the pinion are meshed; the end face of the cam is provided with an annular tank; the roller sliding block system comprises an upper mold sliding block; a roller support is fixed on the upper mold sliding block; a sheave support is fixed on the roller bracket; the roller bracket is provided with a roller; the sheave support is provided with a cam follower; the outer edge of the cam and the outer edge of the roller are meshed; and the cam follower and the annular tank are meshed. During the transmission process of the large gear and the pinion, the eccentric bushing performs a rotating motion following with the large gear; the upper mold sliding block is driven by the upper shaft, the cam and the follower to move up and down, so that the precise adjustment of the stroke of a forming machine is achieved.

The invention discloses a heterodyne spectrometer grating gluing assembling structure and an assembling method. The assembling structure comprises a support base plate, imaging switching plates, collimation switching plates and an L-shaped to-be-glued interference assembly, wherein the upper end and the lower end of the support base plate are each provided with an imaging switching plate to form a vertical surface, the left end and the right end of the support base plate are each provided with a collimation switching plate to form a horizontal surface, the vertical surface and the horizontal surface form a three-vertical-surface reference assembly, and the L-shaped to-be-glued interference assembly is placed on the three-vertical-surface reference assembly. According to the invention, the angle and the tower difference precision of the to-be-glued interference assembly are transmitted and carried on by use of a two-dimensional positioning mechanism, and functions of primary limiting, repeated positioning and high-precision phase error adjustment of grating assemblies are realized by use of a rotation adjustment mechanism and an optical member block. The operation is convenient, the resilience is high, solidification areas are uniform, and the assembling effect of interferogram phase errors can be monitored in real time.

The invention relates to the technical field of engineering measurement and more particularly to a structure for freely adjusting the direction of the optical axis of a laser. The adjusting mechanism comprises a base, a flexible hinge structure, an upper cover, and a plurality of adjusting screws. The flexible hinge structure is fixed inside the base; the upper end of the base is fixed to the upper cover; the laser is fixed in a circular hole in the center of the flexible hinge; the adjusting screws pass through the upper cover to be abutted against the upper part of the flexible hinge structure. The laser is a semiconductor laser with a diameter of 20mm and a wavelength of 650nm. The base material is 6061-T6 aluminum alloy. The flexible hinge is made of spring steel material and quenched, and has good flexibility. The semiconductor laser is fixed to the flexible adjustment mechanism by being locked in the radial direction by locking screws, and the precision adjustment of the laser optical axis can be realized by adjusting the four adjusting screws arranged orthogonally on the upper end face of the base in the hinge direction.

The invention discloses an anti-interference and high-stability cavity dumping laser and a mounting method thereof, and belongs to the technical field of lasers. A cavity plate which is fixed througha connecting rod and provided with a through hole is arranged on an L-shaped plate, and a plano-concave mirror, a convex lens, an LD side pump module, a polarization cube, a quarter-wave plate, a Pockels cell and the plane mirror are arranged in a light path propagation direction; the plano-concave mirror and the plane mirror are arranged in the through hole; the convex lens, the LD side pump module, the polarization cube, the quarter-wave plate and the Pockels cell are arranged on the L-shaped plate; and the curvature radius of the plano-concave lens, the focal length of the convex lens and the distance between the plano-concave lens and the convex lens are equal. According to the invention, insensitivity of the laser to the detuning of a resonant cavity is improved, the precise adjustment of the resonant cavity can be realized, the high stability of the laser is ensured, the output optimization of the laser is ensured, and the anti-interference capability of the laser is improved.

The invention relates to the technical field of safe deposit boxes, in particular to a self-calibration system used for a full-automatic safe deposit box and a method thereof. The self-calibration system comprises a light source device arranged below any one safe deposit box storage groove of a safe deposit box storage frame and a four-quadrant photoelectric detector arranged on a grabbing mechanism; the four-quadrant photoelectric detector corresponds to the light source device in position, the four-quadrant photoelectric detector is used for detecting real-time position data of the light source device and uploads the data to a central control unit, the central control unit is used for comparing the real-time position data with the reference position data, and fine adjustment of the grabbing mechanism is controlled through an execution mechanism until the real-time position data and the reference position data are the same. The self-calibration method is achieved based on the self-calibration system. Automatic calibration of opposite positions between the grabbing mechanism and the grabbing target is achieved.