48results about How to "Avoid precision requirements" patented technology

An SLAM back-end trajectory optimization method based on loop detection includes the following steps: S1, acquiring sensor data; S2, processing the data acquired in S1 to obtain the initial pose of arobot; S3, constructing a pose map model through the initial pose acquired in S2; S4, carrying out closed-loop detection on the pose map model constructed in S3, and separating the closed-loop part and the non-closed-loop part of the pose map model; and S5, optimizing the different parts after detection separately. Each time a closed loop is detected, optimization is carried out. Each time a closed loop appears, the total error of the closed-loop part is calculated, and then, the total error of the non-closed-loop part is calculated. The weight information of edges in the data provided by thefront end is utilized reasonably, and a kernel function (Huber kernel) is added. The pose error can be allocated quickly and effectively, the calculation efficiency can be improved, and the online real-time performance of the back-end optimization process of the robot can be enhanced. Moreover, the accuracy can be ensured.

The invention discloses a minitype high-voltage electric energy meter directly arranged in a 10KV power supply circuit. The electric energy meter comprises a silicon rubber dry-type composite bushing (1), a box body (2), an electric energy metering unit (3), a high-voltage post head (4), an amorphous material current mutual inductor (5) and an isolation transformation circuit board (6), and is characterized in that the high-voltage post head (4) is inserted into the inside of the top end of the silicon rubber dry-type composite bushing (1); the amorphous material current mutual inductor (5) is arranged on the inner top of a cavity of the silicon rubber dry-type composite bushing (1), while the isolation transformation circuit board (6) and a capacitor voltage-reduction power supply circuit board (8) are arranged from the middle part to the lower part inside the cavity of the composite bushing (1); and the isolation transformation circuit board (6) and the capacitor voltage-reduction power supply circuit board (8) are respectively connected with the inner end of the high-voltage post head (4) through corresponding conducting wires (9). The high-voltage electric energy meter has simple and compact structure, convenient installation and high efficiency, and can improve metering precision.

The invention relates to a uniform-thickness machining device and method for spherical crown face box bottom foam plastics of a large-diameter thin-wall box. The device comprises a rotating and positioning ring, a box supporting, rotating and positioning device, a three-axis numerical control machining device, a numerical control system, a spherical crown face box bottom metal surface morphology data measuring system, a computer system, a data acquisition module, a data pre-processing module and a numerical control machining software CAD / CAM module; the data acquisition module is embedded in the numerical control system; and the data pre-processing module and the numerical control machining software CAD / CAM module are embedded in the computer system. The device and method solve the uniform-thickness machining problem of foam plastics sprayed on the box spherical crown face, and it is verified and indicated through practical application that the requirements for surface smoothness and uniform thickness are met when the method is used for performing numerical control form copying on foam plastics sprayed at the spherical crown face box bottom.

The invention relates to a conversion valve. A hollow inner wall of a valve body is in interference fit with a ceramic valve sleeve; a ceramic valve core is driven by a top motor; a shifting block is used for limiting; the middle part of the valve body is provided with a water inlet, a water outlet, an upper drain pipe and a lower drain pipe; the periphery of the valve core is provided with a ring-shaped concave water collecting tank; the valve core is in integrated clearance fit with the valve sleeve; the position of the upper drain pipe corresponds to the water collecting tank; and the position of the lower drain pipe corresponds to a lower water collecting cavity. The integrated ceramic valve core of the invention has the advantages of reasonable structure, convenient assembly, high installing efficiency and low manufacturing cost, and capability of greatly improving the reliability of the conversion valve and prolonging the service life of the conversion valve.

The invention belongs to the technical field of stereo display, and provides a method for evaluating the display effect of a stereo display device. The method comprises: S1, acquiring a left view and a right view displayed by the stereo display device; S2, acquiring the quantity of pixels with a first pixel value and a second pixel value in the left view and / or the quantity of pixels with the first pixel value and the second pixel value in the right view, wherein the first pixel value is not equal to the second pixel value; and S3, evaluating the display effect of the stereo display device according to the relation between the quantity of the pixels with the first pixel value and the quantity of the pixels with the second pixel value in the left view and / or the relation between the quantity of the pixels with the first pixel value and the quantity of the pixels with the second pixel value in the right view. The invention further provides equipment and a system for evaluating the display effect of a stereo display device. The evaluating method, equipment and system simplify fussy operation of evaluating the display effect in the prior art, and improve the objectiveness and the accuracy of display effect evaluation.

The invention discloses an edge pressing mechanism of a high-speed can body stretcher. The edge pressing mechanism of the high-speed can body stretcher is characterized in that a cam follower, an edgepressing push rod, a thrust arm, a follower lever, an edge pressing force arm, an edge pressing slider and an edge pressing sleeve are successively arranged from an edge pressing cam according to a driving chain; a torque shaft is arranged at a turning point for the edge pressing force arm or / and the thrust arm; a first elastic element is arranged for the cam follower to force the cam follower topress tightly the edge pressing cam; and a second elastic element is arranged for the edge pressing sleeve to force the edge pressing sleeve to move in the pressing direction; directions of the forcetransmitted to the follower lever by the first elastic element and the second elastic element are opposite, and a sliding pin at a joint between the follower lever and the edge pressing force arm ismade to be located at the position of one end of an oblong hole. According to the edge pressing mechanism, first, the structure of an original edge pressing mechanism is greatly simplified, and the problem of poor synchronicity of driving of double edge pressing mechanism cams is overcome at the same time; second, maintenance is provided with convenience; and third, the sealing difficulty caused by a previous edge pressing push rod penetrating through an oil separator plate and the problem of serious mutual pollution between oil and emulsion are avoided.

The invention relates to a method for machining a hot-mounted dam roller. The method for machining the hot-mounted dam roller comprises the steps of machining of a roller cylinder, machining of spindle heads and assembling of the roller cylinder and the spindle heads; assembling of the roller cylinder and the spindle heads comprises the following steps that the spindle heads and the roller cylinder are in interference fit to obtain the dam roller; unbalance amount of the dam roller is detected, center offset amount and the offset direction of the dam roller are calculated, when the unbalance amount is larger than 10 g based on a balance amount, a double-four-jaw chunk clamping device on a lathe is adopted to conduct eccentric borrowing on the dam roller, outer circle turning is conducted to remove the unbalance amount; and finish turning is conducted on a second outer circle of the roller cylinder and eighth outer circles, ninth outer circles and tenth outer circles of the spindle heads by adopting a numerical control lathe turning. The method for machining the hot-mounted dam roller has the advantage of high balance precision.

An opening and closing manipulator for a bottle blowing machine comprises a supporting plate and a cam plate which are rotated around corresponding axes, wherein a telescoping cam and an opening-closing cam are arranged on the cam plate; a slide block which is provided with a movable slide rail is mounted on the supporting plate; the slide rail extends to a bottle preform under the effects of a telescoping guide wheel and the telescoping cam; an opening-closing arm on a connecting plate at the tail end of the slide rail is used for driving a first clamping claw to open under the effects of an opening-closing guide rail and the opening-closing cam; the first clamping claw and a second clamping claw are mutually driven to synchronously open through a gear plate. According to the opening and closing manipulator for the bottle blowing machine, the clamping claws can be actively opened, so that the damage of the clamping claws to the bottle preform in a traditional driven opening manner and the requirement on the accuracy of the clamping claws can be avoided, and as a result, the bottle preform can be effectively protected, the product quality and the qualification rate can be improved, and meanwhile, the processing requirement of the clamping claws can be reduced.

The invention discloses a stage lamp. The stage lamp comprises a lamp bulb assembly for emitting light, and further comprises a fixing plate and regulating devices, wherein the regulating devices comprise a first regulating device and a second regulating device; the lamp bulb assembly is mounted on the second regulating device; the first regulating device can move in parallel relative to the fixing plate in a first direction and is connected with the fixing plate; the second regulating device can move in parallel relative to the first regulating device in a second direction and is connected with the first regulating device; the first direction is perpendicular to the second direction. Through arrangement of the two regulating mechanisms, the positions of the lamp bulb assembly in two different directions on the same horizontal plane can be regulated, so that errors caused in the mounting and machining processes are overcome.

The solar battery wing thermal structure coupling integrated simulation analysis method of the present invention is based on finite element grid division, and adopts the finite control volume method and the finite element method to respectively establish a solar battery wing on-orbit thermal analysis model and a mechanical model for structural thermal deformation analysis. The mesh division of the thermal analysis model is relatively sparse, and the scale of the model unit is controlled to realize the thermal analysis calculation. The mesh division of the mechanical model is relatively fine to meet the calculation accuracy of the thermal deformation analysis. Based on the uniform finite element mesh division method, the temperature result obtained from the thermal analysis model is smoothly mapped to the structural model as a load input by using the linear interpolation method, so that the analysis model and the structural analysis model can be organically combined.

The invention discloses an automatic grinding fixture for a numerical-control machine tool, and relates to the technical field of auxiliary accessories for numerical-control machining. The automatic grinding fixture is provided with a mounting plate. A rotary cylinder is arranged on the mounting plate, a die clamping seat is arranged on the rotary cylinder, positioning dies are arranged on the die clamping seat, and workpiece embedding grooves are formed in the positioning dies; a reference positioning slide rail is arranged on the mounting plate, positioning sliders are arranged on the reference positioning slide rail, reference positioning blocks are arranged on the positioning sliders, reference positioning cylinders are arranged on the mounting plate, piston rods of the reference positioning cylinders are connected with the positioning sliders, detection yielding cylinders are arranged on the mounting plate, detection positioning cylinders are arranged on the detection yielding cylinders, displacement detection frames are arranged on piston rods of the detection positioning cylinders, and displacement detection devices are arranged on the displacement detection frames; pliers are arranged on the mounting plate and are positioned at the rear side of the die clamping seat, jaws of the pliers are positioned above the workpiece embedding grooves, a support frame is arranged on the mounting plate, pliers driving cylinders are arranged on the support frame, and piston rods of the pliers driving cylinders are hinged to handles of the pliers. The automatic grinding fixture has the advantages that the automatic grinding fixture is simple in structure, convenient to use and high in production efficiency, and the labor intensity can be relieved.

The invention discloses a device for measuring sensitivity of a wave detector in a reception direction of elastic waves. The device comprises a water tank filled with water, wherein a shock absorption material is stuck at the inner side of the wall of the water tank; a support device is arranged on the water tank; rotating shafts at two ends of the support device are respectively connected with corresponding walls of the water tank; a universal joint is arranged at the middle position of the support device; a wave detector is arranged in the universal joint; the universal joint is connected with a counter weight through a connecting rod I; an electric spark emission probe is arranged at the position of the central line of the support device which is located at the upper side of the support device and below a water body; and a dial is arranged at the outside of the wall of the water tank. Due to the universal joint and the counter weight in the invention, a receiving surface of the wave detector is guaranteed to always keep horizontal when the rotating shafts are rotated for different angles; as the water tank and the support device are coated by rubber, the problem of reflected waves is solved; a lower cross rod is protruded out towards the electric spark emission probe to reduce interference from the reflected waves of the rod to the wave detector. The device for measuring sensitivity of the wave detector in the reception direction of elastic waves, disclosed by the invention, has an advantage of measuring sensitivity of the wave detector in the reception direction of elastic waves.

The invention discloses an intelligent water cup for measuring the concentration of saline water and sweet water for a kitchen, and relates to a kitchen tool. The intelligent water cup comprises a cupbody, a first light emitting module, a second light receiving module and a main controller. The cup body comprises a first containing cavity for containing a solution. The first light emitting moduleand the second light receiving module are arranged on the first end face and the second end face outside a first light channel in the first containing cavity respectively. The first output end of themain controller is connected with the first light emitting module. The second light receiving module is connected with the second input end of the main controller. The main controller comprises a first light emitting control module, a refracted light receiving module, a refractivity solving module and a solution concentration solving module. The requirement for the precision of the solution proportioning of a weighing method is avoided, and the precision of the concentration of the prepared solution is improved; meanwhile, unlike the weighing method where the concentration needs to be obtained through artificial conversion, the concentration of the solution can be obtained again after the evaporation effect or the non-quantitative feeding effect.

This invention relates to a flexible wall penetration device to measure penetration parameters, which comprises the following structure: the confined pressure pipe, drainage pipe, water-in pipe are separately controlled to join the penetration pressure room; the confined pressure pipe and the drainage pipe and the water-in pipe are separately connected the pressure meter, air adjusting valve, pressure supply device and B-part changing pipe, pressure meter, air adjusting valve, supply device and C changing tube, pressure meter, air adjusting valve, supply device, air adjusting valve water box exit

The invention discloses a welding method for an annular header, which is capable of greatly reducing stress concentration. According to the welding method, all oblique nozzles are arranged and fixed at first, and then welding is started; and welding is divided into three steps: 1, fixed-position welding, wherein tungsten inert gas welding is adopted in the fixed-position welding, two sections of connected arc welding areas are arranged at the butt-joint part of each adjacent oblique nozzles and have different arc lengths, the relatively long arc welding area is a first arc welding area, and the relatively short arc welding area is a second arc welding area; 2, backing welding, wherein tungsten inert gas welding is adopted in the backing welding, the annular header is provided with six welding areas in total, which are a welding area A, a welding area B, a welding area C, a welding area D, a welding area E and a welding area F, and the six welding areas are clockwise arranged; and 3, welding seam-filling welding, wherein welding is carried out by virtue of a manual electric arc welding method in the welding seam-filling welding, odd layers and even layers are reversely welded, and so on, until the filling welding is completed. The welding method disclosed by the invention has the advantage of basically no stress concentration.

The invention discloses a home-use self-made beverage concentration measuring method, and relates to the field of a kitchen tool. The method comprises the following steps of firstly collecting the deviation distance of first light rays emitted from a first light emission module on a second light receiving module after the refraction generation through passing through a solution to be tested in a first right-angle trapezoidal sink hole formed in the bottom of a concentration measurement instrument; then, solving the refractive index of the solution to be tested according to the deviation distance, the first distance and the incidence angle; then, obtaining the concentration of the solution to be tested according to the refractive index of the solution to be tested, the solute information ofthe solution to be tested, and the solvent of the solution to be tested. The precision requirement of the solution proportioning ratio of the weighing method is avoided; the precision of the concentration of the prepared solution is improved; meanwhile, the requirement of manual conversion for concentration solving by a weighing method is not needed; for evaporation effects or non-quantitative feeding effects, the solution concentration can be obtained again.

The invention discloses a stage lamp. The stage lamp comprises a lamp bulb assembly for emitting light, and further comprises a fixing plate and regulating devices, wherein the regulating devices comprise a first regulating device and a second regulating device; the lamp bulb assembly is mounted on the second regulating device; the first regulating device can move in parallel relative to the fixing plate in a first direction and is connected with the fixing plate; the second regulating device can move in parallel relative to the first regulating device in a second direction and is connected with the first regulating device; the first direction is perpendicular to the second direction. Through arrangement of the two regulating mechanisms, the positions of the lamp bulb assembly in two different directions on the same horizontal plane can be regulated, so that errors caused in the mounting and machining processes are overcome.

The invention discloses a saline-sugar solution concentration regulating method based on an intelligent cup used for a kitchen, relating to the field of kitchenware. The method includes firstly collecting an offset distance D, on a second light receiving module, of first light emitted by a first light emission module after the first light is reflected by a first accommodating chamber of the intelligent cup; solving the refractive index n of a solution according to the offset distance D, a first distance L and a first angle of incidence [theta]i; acquiring the concentration c of the solution according to the refractive index n of the solution, solute information of the solution, and a solvent of the solution; and finally sending a control instruction to a water feeding control valve according to a relationship between the solution concentration c and a solution target concentration value c<goal>. The method avoids precision requirements on solution ratios in weighing methods, improves the accuracy of the concentration of a prepared solution, and does not need manual conversion to solve the concentration like weighing methods. The concentration of the solution can be acquired again after evaporation or addition of an indefinite quantity of a material.

The invention, which relates to the field of kitchen appliances, discloses a household home-made drink concentration control device comprising an annular case, a main controller, a first light emitting module, a second light receiving module and an inflow control valve. A first inflow channel is formed in the middle of the annular case in a radial direction; a first inlet of the first inflow channel is connected with an inflow control valve; and a second outlet of the first inflow channel includes a right-angle ladder type outlet portion. A first output terminal of the main controller is connected with the first light emitting module; the second light receiving module is connected to a second input terminal of the main controller; and a fifth output terminal of the main controller is connected with a control terminal of the inflow control valve. According to the invention, the accuracy requirement of the solution proportioning of the weighing method is avoided; and the accuracy of theconfigured solution concentration is improved. Meanwhile, the manual concentration calculation based on the existing weighing method is not needed; and the solution concentration can be obtained againafter the effect of evaporation or non-quantitative charging.

The invention discloses an automatic grinding fixture for a numerical-control machine tool, and relates to the technical field of auxiliary accessories for numerical-control machining. The automatic grinding fixture is provided with a mounting plate. A rotary cylinder is arranged on the mounting plate, a die clamping seat is arranged on the rotary cylinder, positioning dies are arranged on the die clamping seat, and workpiece embedding grooves are formed in the positioning dies; a reference positioning slide rail is arranged on the mounting plate, positioning sliders are arranged on the reference positioning slide rail, reference positioning blocks are arranged on the positioning sliders, reference positioning cylinders are arranged on the mounting plate, piston rods of the reference positioning cylinders are connected with the positioning sliders, detection yielding cylinders are arranged on the mounting plate, detection positioning cylinders are arranged on the detection yielding cylinders, displacement detection frames are arranged on piston rods of the detection positioning cylinders, and displacement detection devices are arranged on the displacement detection frames; pliers are arranged on the mounting plate and are positioned at the rear side of the die clamping seat, jaws of the pliers are positioned above the workpiece embedding grooves, a support frame is arranged on the mounting plate, pliers driving cylinders are arranged on the support frame, and piston rods of the pliers driving cylinders are hinged to handles of the pliers. The automatic grinding fixture has the advantages that the automatic grinding fixture is simple in structure, convenient to use and high in production efficiency, and the labor intensity can be relieved.