30results about How to "High fine-tuning precision" patented technology

The invention discloses a convolutional neural network automatic segmentation method and system for a mammary molybdenum target data set, which can obviously reduce model parameters and improve the practicability while ensuring the precision of a deep learning model on a mammary molybdenum target small data set. The method comprises the following steps: pre-training a convolutional neural big network on a mammary molybdenum target big data set; performing model compression on the trained convolutional neural large network by adopting attention transfer and knowledge distillation methods to obtain a convolutional neural small network; and carrying out fine tuning on the convolutional neural small network on the mammary molybdenum target small data set.

The invention relates to an assembling tool for an assembled wall, in particular to a movable assembling frame for the assembled wall. The movable assembling frame for the assembled wall comprises a tackle, a supporting device, a lifting mechanism, a translation fine adjustment mechanism, a turnover adjusting mechanism and a feeding adjusting mechanism; a rail for the supporting device to slide isarranged on the tackle; the supporting device comprises a sliding base and a support, the support comprises a vertical frame and an adjusting frame connected with the vertical frame in an up-down sliding manner, and a positioning pin is arranged on the adjusting frame; the lifting mechanism is used for driving the adjusting frame to lift up and down; the translation fine adjustment mechanism is used for driving the adjusting frame to horizontally translate; the turnover adjusting mechanism is used for driving the adjusting frame to vertically turn over; and the feeding adjusting mechanism isused for driving the sliding base to feed on the tackle. The movable assembling frame has the beneficial effects of being convenient to transport, capable of effectively conducting assembly fine adjustment according to the situation of an assembled part, convenient to operate and the like.

The invention discloses a fine adjustment device for a slide block of a four-column overhead oil cylinder press. The device comprises the slide block, a connecting rod, a worm, an eccentric worm wheel, a protective cover, a pin shaft and an oilless bearing, wherein the two ends of the worm are arranged on the slide block respectively; the protective cover is arranged; the eccentric worm wheel is arranged on the slide block and is engaged with the worm; the oilless bearing is pressed into a hole of the connecting rod; the pin shaft is arranged in an eccentric inner hole of the eccentric worm wheel and a hole of the oilless bearing; and the pin shaft and the slide block are fastened by using a forcing screw which passes through a long slotted hole of the eccentric worm wheel. The device is easy and convenient to adjust and high in fine adjustment accuracy and is applied to a wide-table press, so that a gap of the connecting rod can be eliminated, deflection curve distribution of the slide block is effectively improved, deflection peak is reduced, and the parallelism error of the slide block meets requirements specified by a standard.

The invention relates to a support tool for assembling equipment. The prior art can achieve equipment assembly through cooperation of a plurality of workers but fails to achieve fine adjustment of the equipment pitch. The support tool is characterized in that a plurality pairs of pin holes with different distances arranged on sleeves and a support pipe on the left and the right sides are combined to carry out pitch coarse adjustment, and a middle hand wheel is used for driving the sleeves connected with each other through a left and a right rotating threads to retract and extend, thus achieving fine adjustment. The support tool consists of a fixing pin, the sleeves, the hand wheel, the support pipe, a fastening screw cap, fixing pin holes, an adjusting screw nut, an adjusting screw and a wood ferrule. The support tool has the positive effects of good generality, high accuracy for fine adjustment, lowered cost and improved work efficiency, and is a labor-saving, time-saving and work-saving assistant tool.

The invention relates to an expansion belt comprising an expansion belt body and an adjusting device, and two end portions of the expansion belt body are connected with the adjusting device. The adjusting device adjusts the displacement between the two end portions of the expansion belt body in a manner of adjusting the two end portions of the expansion belt body to move oppositely.

The invention discloses a double vertical clamping structure for finely adjusting a double-worm-wheel fly cutter radially. A center hole which faces the active end and is concentric with a rotating central line of a cutter bar is formed in the passive end of the cutter bar, two parallel two-section stepped concentric holes for mounting, clamping and finely adjusting the fly cutter are radially formed along the rotating central line of the cutter bar, large holes of the two-section stepped concentric holes are cylindrical holes, small holes of the two-section stepped concentric holes are screwthrough holes, and the center distance between the two-section stepped concentric holes is the axial tooth pitch of a working worm; two sections of threads which are the same in screwing direction anddifferent in screw pitch are arranged on a locking screw and correspondingly connected with the screw through holes and a screw hole formed in a fly cutter round straight handle, so that the fly cutter is never loosened after being finely adjusted and clamped in the radial direction of the cutter bar; and a positioning clamping mechanism is arranged in the center hole, the oblique end faces of the opposite ends of a positioning jacking rod slide onto the obliquely-beveled plane of the fly cutter round straight handle to form close face contact under the combined action of the locking screw and a force applying component, and the fly cutter is fastened in the corresponding cylindrical hole and located at the correct position. The radial fine-adjusting and positioning double vertical clamping technical scheme is suitable for high-precision and large-cutting-force rolling cutting of multi-head worm wheels.

The invention relates to a drill spindle system for a multi-spindle deep hole drilling machine. Errors of a plurality of drill spindles for drilling deep holes are corrected by means of mechanical elastic deformation principle. The drill spindle system is characterized in that a drill rod slightly bends and elastically deforms when the acting force of a fine adjustment screw acts at the center of the drill rod, the deformation of the drill rod is determined by means of calculation according to the hole pitch error value of a tool discharge surface of a drilled workpiece (namely the back surface of the workpiece), the position of a drill bit in a drill bushing is slightly shifted relative to an original position at the moment, and the offset value of the drill bit exactly compensates the hole pitch error value of the tool discharge surface when the drill bit axially moves to the tool discharge surface of the workpiece in a drilling manner. The drill rod reliably and axially moves in a drilling manner through a guide sleeve of an embedded structure, holes of different sizes can be machined by changing drill bits, drill rods and buttress sleeves of different sizes, and the hole pitch error correction system enables the drill spindles of the multi-spindle deep hole drilling machine to simultaneously drill 1000mm deep holes with extremely small adjacent hole pitch errors and accumulated hole pitch errors.

The invention discloses an angle fine adjustment device of a wall-mounted fixing device for a wall-mounted instrument. The angle fine adjustment device comprises a supporting rod, a lever, a fine adjustment bolt and a high-precision fine adjustment bolt; the supporting rod is one of two supporting rods of the wall-mounted fixing device for the wall-mounted instrument; the supporting rod and a nail hanging notch form a three-point support stable structure on a wall; one end of the lever is located behind the supporting rod and located between the fine adjustment bolt and the supporting rod; and the high-precision fine adjustment bolt is used for spirally pushing a power arm of the lever to pry the fine adjustment bolt and the supporting rod to slightly push the supporting rod to slightly move, so that high-precision angle fine adjustment of the wall-mounted fixing device for the wall-mounted instrument is realized. The angle fine adjustment device of the wall-mounted fixing device for the wall-mounted instrument has the beneficial effects that the angle fine adjustment precision of the wall-mounted fixing device for the wall-mounted instrument can be effectively improved; and the device is provided with the two fine adjustment bolts, so that fine adjustment and high-precision fine adjustment can be achieved, and the wall-mounted fixing device for the wall-mounted instrument is more convenient to use.

The invention discloses a machining device capable of accurately adjusting a gap. The machining device comprises a fine adjustment mechanism, a movable seat, a connecting seat, an adjusting head, a sliding groove, a driving gear, a driven gear, a screw device and a first threaded hole. The device is reasonable and simple in structure, low in production cost and convenient to install, the adjusting head drives the driving gear to rotate, the driving gear rotates to drive the whole screw device to rotate through the driven gear, and the screw device rotates to enable the movable seat and the fine adjustment mechanism to drive the driving arm to move. Therefore, rapid coarse adjustment of the fit clearance between the bottom of the driving arm and the cam is achieved, and the adjustment efficiency is improved. According to the fine adjustment mechanism, the distance of the inclined surface block can be finely adjusted through a differential thread mechanism composed of an adjusting sleeve body, a stud and the like, meanwhile, an inclined surface moving mechanism composed of the inclined surface block and an inner inclined surface groove is further matched, so that the fine adjustment precision is improved, and the driving arm can be driven to be finely adjusted through the connecting block.

The invention relates to a complex harmonic transmission device with a double-clutch mechanism. the complex harmonic transmission device is characterized by comprising a first wave generator, a secondwave generator, a first flexible outer gear, a second flexible outer gear, a first rigid inner gear, a second rigid inner gear, a first shaft sleeve, a second shaft sleeve, a third shaft sleeve, a first electromagnetic disc, a second electromagnetic disc, a third electromagnetic disc, a fourth electromagnetic disc, a first metal plate, a second metal plate, a center shaft and a total output shaft; the first wave generator and the second wave generator are arranged in the first flexible outer gear and the second flexible outer gear correspondingly; the first flexible outer gear and the secondflexible outer gear are arranged in the first rigid inner gear and the second rigid inner gear correspondingly, and the first shaft sleeve is connected with the first flexible outer gear; the first shaft sleeve and the third shaft sleeve are arranged on the center shaft in a sleeving mode, and the first metal disc is arranged on the center shaft; the first electromagnetic disc and the second electromagnetic disc are located on the left side and the right side of the first metal disc correspondingly; the second wave generator is connected with the second shaft sleeve, and the third shaft sleeveis connected with the second flexible outer gear; and the fourth electric disc is arranged at the right end of the central shaft, the third electromagnetic disc and the fourth electromagnetic disc are located on the left side and the right side of the second metal plate correspondingly, and the total output shaft is connected with the second metal plate. The device has the advantages that conversion can be carried out between the first-stage harmonic transmission and the second-stage harmonic transmission.

The invention discloses a 3D high definition projector, wherein a housing is installed on an upper surface of a base through a screw; a cover body is movably installed on an upper edge of the housingthrough a rotating shaft; a signal processor and a storage battery are arranged in the housing; a projection port is formed in a front outer wall of the housing, and a power interface, a USB interface, an SD card socket and a high definition data interface are formed in a side face of the projection port; heat dissipation holes are uniformly formed in an inner wall of the housing; an outer wall board at the rear of the housing is a serrated heat dissipation plate; a switch button is arranged at the center of the upper surface of the cover body; an adjusting roller is further embedded in the outer wall of the housing; and a gear rack is arranged on the outer wall of the adjusting roller and is engaged with an upper segment side face of an adjusting screw. The 3D high definition projector disclosed by the invention is reasonable in structure, good in heat dissipation performance, clear in projection picture and is power failure resistant.

The invention provides a polarizing device and an optical alignment device, comprise a polarizing unit and a mounting frame. The polarizing unit comprises a polarizing wire grid, a wire grid frame plate and a wire grid adjustment unit. The wire grid frame plate is used for supporting the polarizing wire grid, and is rotationally installed on the mounting frame in the normal direction of the polarizing wire grid as a rotating shaft. The wire grid adjustment unit provides a driving force for rotation of the wire grid frame plate, and the rotating shaft of the wire grid frame plate and the driving force point of the wire grid adjusting unit are located on a pair of diagonal lines of the wire grid plane of the polarizing wire grid. According to the polarizing device and optical alignment device, the problem that the adjusting resolution of an existing polarizing device cannot meet the actual use requirement is solved.

The invention discloses a foldable wall-mounted fixing device for a wall-mounted instrument which comprises a hanging arm assembly, a vertical connecting assembly and a bearing assembly; the hanging arm assembly is located above the bearing assembly; and the same side ends of the hanging arm assembly and the bearing assembly are rotationally connected with the vertical connecting assembly which is vertically arranged. The foldable wall-mounted fixing device has the beneficial effects that the hanging notch has two design modes, namely a structure with a wide lower part and a narrow upper part or a rubber mat arranged at the hanging notch, so that the nail hanging device can adapt to nails of various specifications through the design with the wide lower part and the narrow upper part; the hanging notch is firmly clamped on the outer side of the rod part of the nail through the overall gravity of the device and the wall sticking instrument, or the friction coefficient between the hanging notch and the nail rod is increased in a mode of arranging a rubber mat; and therefore the effect of stably clamping the outer side of the nail rod part is achieved.

The invention provides a voltage output fine tuning circuit. The circuit is characterized in that the circuit includes a MOS pipe Q1, a MOS pipe Q2, a capacitor C and an inverter T1; the MOS pipe Q1 and the capacitor C are connected in series between a power supply VCC terminal and a ground terminal, a grid is connected to an input terminal Vin of the circuit through the inverter T1, and the MOS pipe Q1 is used for realizing on and off according to an inversion signal of the input terminal Vin so as to charge the capacitor C; the MOS pipe Q2 is connected to the capacitor C and an output terminal Vout of the circuit, a grid is connected to the input terminal Vin of the circuit and is used for realizing on and off according to a signal of the input terminal Vin so as to output an electric quantity of the capacitor C. The circuit has advantages that the circuit structure is simple and enforcement cost is low; through different duty ratios of a periodic square wave, a charging amount of the capacitor C is adjusted and fine tuning precision is high; the integral circuit has no resistive component, a resistance of the integral circuit is not influenced; and an engineer does not need to consider a circuit calorific value and energy consumption.

The invention relates to a double perpendicular clamping structure for finely adjusting a worm wheel flying cutter in the radial direction. A center blind hole which faces a driving end and is concentric with the rotary center of a cutter bar is arranged at the driven end of the cutter bar, and a two sections of stepped concentric holes are formed in the radial direction of the rotary center lineof the cutter bar, the large hole is a cylindrical hole, and the small hole is a threaded through hole. Two sections of threads same in turning direction and different in screw pitch are arranged on alocking screw and are connected with the threaded through hole and a screw hole in a round and straight handle of the flying cutter correspondingly. An elastic part is arranged between the plane of the input end of the cylindrical hole and the plane of a cutter bit of the flying cutter, and a positioning and clamping mechanism is arranged in the center blind hole. Under the combined action of thelocking screw and a force applying component, the inclined end face of the opposite end of a positioning ejector rod slides to the cutting plane of the round and straight handle of the flying cutterto form close face contact, the flying cutter is fastened in the cylindrical hole and never loosens after being precisely and finely adjusted and clamped in the radial direction, and the cutting portion of the flying cutter is located at the position the same as a working worm. The technical scheme is suitable for roll cutting a worm wheel small in cutter bar diameter, high in precision and largein cutting force.