36 results about "Leaf inclination angle" patented technology

For precision grading of terrain by a dozer, the dozer blade can be automatically controlled based on measurements from a combination of a global navigation satellite system real-time kinematic mode (GNSS RTK) system and inertial sensors. At least one GNSS sensor and at least one inertial sensor are mounted on the dozer. Control algorithms are based on blade elevation and blade slope angle. During a period of GNSS RTK system outage, control of blade elevation is not available. Blade control is maintained by switching to control algorithms based on blade slope angle and blade pitch angle. Blade slope angle and blade pitch angle are controlled based on extrapolated target values of blade slope angle and blade pitch angle. The extrapolated target values of the angles are extrapolated from target values of the angles prior to the GNSS RTK system outage with the use of a distance travelled by the dozer.

The slope angle of a blade on an earthmoving machine is automatically controlled based on measurements from a three-axis gyroscope, a blade slope angle tilt sensor, and a blade tip angle tilt sensor mounted on the blade. A three-axis gyroscope has high dynamic response and high resistance to mechanical disturbances but is subject to potentially unbounded errors. A tilt sensor has bounded errors but has a slow dynamic response and a high sensitivity to mechanical disturbances. The combination of a three-axis gyroscope and two tilt sensors provides an advantageous measurement system. Algorithms for performing proper fusion of the measurements account for the lack of synchronization between the three-axis gyroscope and the tilt sensors and also screen out invalid measurements from the tilt sensors. The blade slope angle is controlled based on a reference blade slope angle and an estimate of the blade slope angle computed from properly fused measurements.

On a dozer, a semi-automatic system automatically translates a joystick to control blade elevation and provides an indicator display to guide manual control of blade slope angle. A mechanical linkage operably couples the joystick to an electrical motor. A computational system receives measurements from measurement units mounted on the dozer; calculates estimated values of elevation and slope angle; compares the estimated values to reference values; and calculates error and control signals. Drivers generate a motor drive signal and a display drive signal. In response to the motor drive signal, the electrical motor translates the joystick to control elevation. In response to the display drive signal, the indicator display generates a graphical representation of the status of slope angle. When the operator needs to take manual control, a proximity sensor detects the presence of at least a portion of the operator's hand, wrist, or forearm and disengages automatic control of elevation.

Provided is a wind turbine generator system that can more accurately perform cut-out control by monitoring the measured value from an anemometer for abnormality. In the wind turbine generator system including, in a nacelle (3) mounted atop a tower, a main shaft that is coupled to a rotor head (4) to which wind turbine blades (5) are attached and that integrally rotates therewith, a gear box (10) accelerating and outputting the rotation speed of the main shaft, a generator (11) driven by the output of the gear box (10), and a controller (20) that performs cut-out control during strong wind when a measured value from an anemometer (7) is a predetermined level or more, the controller (20) is configured to decide that the anemometer has a fault when a difference of a predetermined level or more occurs between the measured value from the anemometer (7) and an estimated wind speed value obtained from a relationship between a blade-pitch-angle of the wind turbine blades (5) and an output of the generator (11).

The invention discloses a shutter-type wind sound barrier. The shutter-type wind sound barrier comprises at least two support columns, the support columns are distributed at intervals and fixed to the ground or a base, at least two soundproofing vanes are rotationally connected to the support columns and located between the two adjacent support columns, the soundproofing vanes are used for sound absorption, sound insulation, flow diversion and flow disturbing through rotation, the upper portions and/or the lower portions of the soundproofing vanes are inclined toward the leeward wind direction, at least one free plate edges of the soundproofing vanes extend outwards, and narrow gaps for forming flow diversion channels and flow disturbing channels are formed between the adjacent soundproofing vanes. In the resistance to strong winds, the inherent stiffness of the soundproofing vanes is utilized to block the flow, the inclined angle and the inclined direction of the soundproofing vanes are utilized to diverse the flow, and the narrow gaps are utilized to discharge, so that the windproof performance of a vehicle, a train, a bridge and the like is better; and the ideas of sound barrier and wind barrier are combined organically, and the shutter-type wind sound barrier is capable of being efficient, reasonable, simple, convenient, novel and attractive, suitable for promotion and great in economic benefits.

A blade inclination angle adjustable and anti-slide abrasion-resisting reducing pitch adjusting detachable delivery pump screw shaft is composed of nine different detachable blade assemblies, a bladeinclination angle adjusting structure, a blade positioning structure, a rotary shaft, a tail end baffle and a vacancy filling plate. The nine different detachable blade assemblies cooperate with one another to form a reducing pitch adjusting spiral shaft structure, the blade inclination angle adjusting structure is adopted, different blade inclination angles can be adjusted according to needs, andthe material blockage situation is greatly improved; the detachable blade assembly structure is adopted, blade installing, demounting and maintaining are very convenient, and the cleaning difficultyof blades is greatly lowered; and the blades are provided with a plurality of grooves and lugs which are all in different shapes and are arrayed in a stagger manner, material sliding is prevented, andthe blade is provided with arc-shaped anti-abrasion ribs so that the blade abrasion situation can be improved. By means of the blade inclination angle adjustable and anti-slide abrasion-resisting reducing pitch adjusting detachable delivery pump screw shaft, the material blockage, sliding, abrading and other problems in the running process of a screw conveying pump are solved, the working performance is improved, and the service life is prolonged.

The invention provides a plant leaf inclination angle measuring method and device. The method comprises the steps of acquiring a plant point cloud image of a target plant; performing clustering segmentation on the plant point cloud image to obtain a plurality of leaf point cloud images; carrying out surface reconstruction on any blade point cloud image, determining the actual area of any blade point cloud image, carrying out plane projection on any blade point cloud image, and determining the projection area of any blade point cloud image; determining an inclination angle of any blade point cloud image based on the actual area and the projection area; and determining a plant leaf inclination angle of the target plant based on the inclination angles of the plurality of leaf point cloud images. According to the plant leaf inclination angle measuring method provided by the invention, the inclination angle of the single leaf is obtained by obtaining the plurality of leaf point cloud imagesand based on the actual area and the projection area of the leaf point cloud images, so that the plant leaf inclination angle is obtained, damage to the plant can be avoided, and the precision of measuring the plant leaf inclination angle can be improved; the efficiency of measuring the plant leaf inclination angle is improved.

The invention discloses a double-layer bulletproof air inlet grille which comprises an outer frame located at an air inlet of a front cover. The front end of the outer frame is fixedly connected witha fixed grille with a fixed blade inclination angle, the rear end of the outer frame is connected with a movable grille with an adjustable blade inclination angle, and linkage mechanisms capable of enabling blades of the movable grille to rotate together relative to the outer frame are fixedly arranged on the two sides of the blades of the movable grille. The invention further provides an air inlet grille assembly based on the double-layer bulletproof air inlet grille and an automobile. The air inlet grille assembly further comprises an operation device located in a cab, and a connecting rod mechanism for converting the reciprocating motion of an operating rod in a gear shifting channel into the reciprocating motion of a linkage rod is further connected between the operation device and thelinkage rod. The fixed grille mainly prevents bullets from directly penetrating through the grille blades, and the movable grille can intercept secondary bounce and splash debris by adjusting the blade inclination angle, and therefore the safety of the bulletproof automobile is ensured; and meanwhile, a driver can adjust the blade inclination angle of the movable grille according to actual conditions to realize different protection levels.

The invention provides a suitable machine picking group construction method of dripping irrigation cotton fields in Tarim Basin of South Xinjiang. The method comprises the steps of variety selection, plant row spacing and density configuration, irrigation and fertilizer application of cotton fields with different growing conditions, mepiquat chloride using method formulation and the like. A cotton variety constructed by a machine picking dripping irrigation cotton field group is put forward. The growth period is 131-136 days. The group has a rapid sensitivity to a defoliant; particularly, several days after spraying the defoliant, the leaf defoliation rate of the cotton field group is up to 91.2-94.5 %; the leaf inclination angle in the variety setting period is 46.5-65.1 degrees; the internode distance of fruit branches is 7-12 cm; the leaf size is medium and small; bracts are small; cotton leaves are good, and fluffs on the back of the cotton leaves are few; the ground clearance of cotton bolls at the lowermost portion of cotton plants is 18.0-22.0 cm; the covering of mulching films, and the planting mode of wide and narrow row or equal row spacing are used while planting. According to the method, not only are the leaf defoliation rate of the cotton leaves, the picking net rate of the machine picking, the fiber length of processed ginned cotton, the fiber strength of the processed ginned cotton and the picking efficiency increased, but also the loss rate of the machine picking and the impurity rate of seed cottons are reduced, and the production requirements are completely met.

The invention discloses a method for measuring the stress state of plant water, which comprises the following steps: S1: determinating the scanned range and the sampling point of the plant to be measured and constructing an x y rectangular coordinate system within the determinated scanned range; S2: acquiring a height value d x y of the sampling point in the scanned range; S3: setting a height threshold D, combing the height value d x y of the sampling point, and extracting the sampling point positioned on the leaf of the plant to be measured; S4: reconstructing a three-dimensional space shape and calculating the three parameters of the average height h0 of the leaf, the inclination angle Alpha of the leaf and the area of the leaf s0 on the basis of combing the x y coordinate system constructed in the S1 and the height value of the extracted sampling point positioned on the leaf of the plant in the S3; and S5: according to the three parameters of the average height h0 of the leaf, the inclination angle Alpha of the leaf and the area of the leaf s0, and floristics to be measured, judging the water loss of the current plant. The invention can directly measure plant morphological characteristics, and has simple operation process, low degree of operation difficulty and the effect of small measurement error.

The invention discloses a plant leaf inclination angle calculation method based on three-dimensional point cloud data. According to the method, scanning of an environment simulating the growing state of plant leaves is realized through a Kinect sensor, and three-dimensional reconstruction of the plant leaves is realized through a series of processes of filtering, partitioning, registration and surface reconstruction algorithms. For reconstructed three-dimensional leaves, an OBB algorithm is proposed to establish a minimum circumscribed cuboid for the reconstructed plant leaves, then a normal vector of the minimum circumscribed cuboid is calculated, and finally an included angle, namely a leaf inclination angle, between the normal vector and a normal vector perpendicular to the ground is solved. Different from a traditional leaf inclination angle manual measurement process, the method is high in automation degree, and manual measurement time is greatly saved.

The invention provides a method for detecting the inclination angle of blades of a water pump. The method is simple and accurate in measurement and high measurement efficiency. The method is characterized by comprising the following steps of: firstly, marking contour lines on each blade, and ensuring that the lateral distances from all contour lines to the rotation center of a rotor body are equal; secondly, installing and fixing each blade on the rotor body; and detecting the vertical height difference of the contour lines on each blade. When all the vertical height differences are equal, the inclination angles of all blades on the rotor body are consistent. When all the vertical height differences are not equal, the inclination angles of the blades are adjusted until the vertical height difference of all contour lines are consistent.

The invention provides a wind guiding structure and an electronic device applying the same. The wind guiding structure comprises a fan and a guide impeller; the guide impeller is mounted on a wind outlet side of the fan, and comprises a base and a plurality of blades; the base comprises a wind inlet cylinder and an extension part; the wind inlet cylinder is close to the fan; the extension part extends to the periphery from the wind inlet cylinder; the connection part between the extension part and the wind inlet cylinder is in fillet transition; the blades are arranged on the base; each bladeis provided with a front-section linking part and a rear-section guiding part; the linking parts of the blades are close to the fan; the inclination angles of the blades at the linking parts are opposite to those of fan blades of the fan, so that a wind outlet field continues swirl characteristics; and the guiding parts extend from the linking parts to the outer part of the base, so that the windoutlet field is gradually converted from a high axial component state to a high radial component state, and is dispersed in a direction far from the axial center of the fan. The wind guiding structurecan continue and enhance the rotary swirl characteristics of the wind outlet field, reduces the axial wind resistance, and improves the wind exhausting efficiency of the fan.

The invention discloses a sun louver capable of adjusting the indoor air speed and the indoor air direction of a gymnasium. The inclination angle of blades of the sun louver are can be adjusted; the sun louver is right arranged on the outer side of an air inflow window of the southern facade of the gymnasium, and the distance between the sun louver and a southern facade wall is 0.7-1 time of the width of each blade; according to the inclination angle of the blades, the blades are horizontally arranged or arranged in an up-dip or down-dip mode, and the up-dip angle and the down-dip angle of the blades is 25-40 degrees. Due to the fact that the sun louver with the inclination angle of the blades adjustable is arranged a certain distance from the air inflow window, the air direction and the air speed of indoor natural ventilation can be adjusted; the purposes of saving energy, improving an indoor healthy air environment and meeting the using requirements of different functions are achieved; the requirements of training and competition of large balls such as basketballs and volleyballs, small balls such as table tennis and badmintons and various sporting events for an indoor environment can be met.

The invention provides a multi-microgravity louver baffling composite electric dust precipitator, which comprises a square shell. Two ends of the shell are provided with an air inlet and an air outlet. Multi-rows of dust collecting poles are arranged in the shell, and the dust collecting poles comprise a dust collecting frame and transparent dust collecting plates. The dust collecting plates are axially and uniformly arranged in the dust collecting frame, and airflow channels are formed between the adjacent two dust collecting poles and between the outer dust collecting pole and the inner wallof the shell at the corresponding side. A baffle plate is respectively disposed at an inlet end of each odd-numbered airflow channel and an outlet end of each even-numbered airflow channel, and corona electrodes are uniformly arranged axially in each airflow channel. The corona electrode is composed of a pole and a pole pin fixed on the pole. The dust collecting plate is a continuous W-shaped structure, and is composed of a plurality of blades connected and fixed by locating pins. The blades are equally spaced. The inclination angle of the blade is 95-105 degrees; the distance between two adjacent blades is 25-35 mm; and the blade width is 45-55 mm. Through the technical scheme provided by the invention, reentrainment of dust can be greatly suppressed, and a better dust removal effect isachieved.

The invention relates to an anchor type stirring device, which comprises a stirring shaft, wherein the lower end of the stirring shaft is provided with an anchor type stirring paddle; two connecting arms are arranged between the stirring shaft and the anchor type stirring paddle; each connecting arm is a downwards pushing inclined blade; two short downwards pushing inclined blades are arranged in the positions of the connecting arms of the stirring shaft in the direction vertical to the plane of the anchor type paddle blades; the inclination angle of the downwards pushing inclined blades and the short downwards pushing inclined blades is 40 to 50 degrees; the diameter of each short downwards pushing inclined blade is 0.4 to 0.5 times of the diameter of the anchor type paddle blades. The anchor type stirring device has the advantages that materials can be promoted to be integrally and uniformly mixed; the evaporation concentration process is favorably, stably and uniformly performed; meanwhile, the stirring power consumption is reduced; the paddle blade or motor damage is reduced.