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43results about How to "Guaranteed universality" patented technology

Indoor four-rotor unmanned aerial vehicle 360-degree three-dimensional obstacle avoidance system

The invention relates to an indoor four-rotor unmanned aerial vehicle 360-degree three-dimensional obstacle avoidance system and belongs to the control science and control engineering field. When a four-rotor unmanned aerial vehicle cruises indoors to perform tasks such as rescue and relief work, problems can be brought to the flight of the four-rotor unmanned aerial vehicle caused by relatively complex indoor environment, weak GPS signals and difficulty in deploying peripherals, and in order to solve the above problems, the four-rotor unmanned aerial vehicle 360-degree three-dimensional obstacle detection and obstacle avoidance decision making device is designed. An STM32f103 is adopted as a core processor, and the number and the positions of ultrasonic sensors are reasonably configured, so that a model for acquiring surrounding environment information is constructed, and therefore, three-dimensional obstacle detection can be realized. When the four-rotor unmanned aerial vehicle performs a task, the obstacle avoidance decision making system performs Kalman filtering processing on acquired obstacle distance values and thereafter, performs data fusion based on directions, and performs obstacle avoidance decision making based on fused data through a fuzzy logic algorithm, and sends an obstacle avoidance decision to a flight controller through a serial port; and the flight controller controls the flight attitude of the unmanned aerial vehicle to complete an obstacle avoidance task.
Owner:BEIJING UNIV OF TECH

Method for automatically identifying walls in house type graph

The invention provides a method for automatically identifying a wall body in a house type graph, which comprises the following steps of: carrying out position analysis on interference information in the house type graph, and eliminating the interference information in the house type graph by utilizing the maximum outer contour of the wall body; setting a segmentation threshold value according to bimodal characteristics of a wall gray histogram in the house type image, segmenting a wall area from the gray scale house type image according to the segmentation threshold value, and filtering an interference item according to the size of a connected domain area; and generating a vector data structure of the wall in a directional straight line fitting manner, so that the wall is identified from the house type graph. According to the method for automatically identifying the wall body in the house type graph, in the house type graph preprocessing stage, removal processing on interference information in the house type graph is added, the difficulty of follow-up wall recognition is reduced, and the accuracy of wall recognition is improved; the improved histogram double-peak method is utilizedto segment the wall body, and the situation of uneven gray scale caused by edge information damage is considered during threshold value selection, so that the wall body and the background can be distinguished better.
Owner:南京维狸家智能科技有限公司

System and method for dynamically detecting and distributing water for garden

The invention relates to a system and a method for dynamically detecting and distributing water for a garden. The system comprises water sources, a water quality detecting unit, a distributing unit, a temporary storage reservoir, a reclaimed water connecting pipe and a sewage connecting pipe; a water quality detecting main power source is arranged at a water inlet of the water quality detecting unit, water of each water source flows into the water quality detecting unit via the water inlet and flows out of the water quality detecting unit from an overflow opening in an opening state, and the water of each water source directly flows to the overflow opening from the water inlet in a closed state; and the temporary storage reservoir is provided with an inlet and an outlet, a buffer cavity is arranged at the inlet, an impeller unit is arranged in the buffer cavity and comprises a variable-pitch spiral impeller assembly, a positioning bearing, a rotary shaft and a support, the shape of each blade of an n variable-pitch spiral impeller of the variable-pitch spiral impeller assembly meets trajectory equations of X<1>=rXcos(theta<1>+2XpiXn/N), Y<1>=rXsin(theta<1>+2XpiXn/N) and Z<1>=(n-1)X(L+a)/N+[theta<1>/(2Xpi)]<m>X[L-(N-1)Xa]/N, the n is larger than or equal to 1 and is smaller than or equal to the N, a trajectory corresponding to the trajectory equations extends from one end, which is close to a water inlet valve, of the pitch-variable spiral impeller to the other end of the pitch-variable spiral impeller.
Owner:BEIJING NORMAL UNIVERSITY

Water quality analyzing system based on dynamic comprehensive evaluating method for water resource security

The invention relates to a water quality analyzing system based on a dynamic comprehensive evaluating method for water resource security. The system comprises a body, a water quality detecting unit, a water level controlling unit, a water sample invoking unit, a communication unit and an external controller, wherein the water level controlling unit is fixedly connected with the body; the water inlet valve and water outlet valve of the water level controlling unit are respectively arranged on a water inlet and a water outlet; a cushion chamber is arranged at the water inlet valve; the water leakage holes of the cushion chamber are arranged in a staggered manner; an impeller unit of the water level controlling unit is arranged in the cushion chamber and comprises a variable-pitch spiral impeller assembly, a location bearing, a rotating shaft and a support; and the locus equation of the blade shape of the nth (n is greater than or equal to 1 and less than or equal to N) variable-pitch spiral impeller of the variable-pitch spiral impeller assembly from one end, closing to the water inlet valve, of the variable-pitch spiral impeller to the other end of the variable-pitch spiral impeller is as follows: Xi=r*cos(theta i+2pi*n/N), Yi=r*sin(theta i+2pi*n/N), Zi=(n-1)*(L+alpha)/N+(theta i/2pi)m*[L-(N-1)alpha]/N.
Owner:BEIJING NORMAL UNIVERSITY

Pupil detection method and device

The invention is applicable to the technical field of computer detection and provides a pupil detection method and device. The method comprises the following steps of: acquiring pupil iris images of atested object in different luminous flux environments, wherein the pupil iris images comprise a reference image, a dark pupil image and a bright pupil image, and the reference image is used for representing the pupil iris image of the tested object when the luminous flux is preset; respectively calculating a first ratio of the pupil area to the iris area in the reference image, a second ratio ofthe pupil area to the iris area in the dark pupil image and a third ratio of the pupil area to the iris area in the bright pupil image; and determining whether the pupil of the detected object is abnormal or not according to the first ratio, the second ratio, the third ratio and a preset detection model. The method acquires the reference image, the dark pupil image and the bright pupil image of anobject to be detected in environments with different luminous fluxes, calculates the ratios of the pupil area to the iris area in the images, determines whether the pupil of the object to be detectedis abnormal not according to the area ratios, ensures the accuracy and universality of pupil detection, and improves the accuracy of pupil detection.
Owner:高金铎

Automatic loading and unloading robot for part machining

The invention discloses an automatic loading and unloading robot for part machining. The robot comprises a moving and adjusting frame, a hydraulic pump I, a grabbing disk and a machine base; the machine base is arranged below the moving and adjusting frame; a moving platform is horizontally arranged at the bottom of the moving and adjusting frame; a motor I is arranged at one end of the moving platform; and a motor IV is arranged above the moving platform. The robot has the beneficial effects as follows: the robot is widely applicable, can perform loading grabbing and movement on materials required before part machining and can also perform unloading grabbing, movement and adjustment on part products after part machining, so that the adaptation universality is guaranteed; the robot is highin automation degree of working and is time-saving and labor-saving in use, a motor II drives a turning plate and the grabbing disk for rotation adjustment, a motor III drives a hydraulic pump II andthe grabbing disk for up-and-down turning adjustment, and a motor VI below the hydraulic pump I drives the grabbing disk through a swinging rod I to rotate to adjust the dropping angle and height, sothat the robot can drop different kinds of parts or required materials more accurately and appropriately.
Owner:AVIC POWER SCI & TECH ENG

Free conflux vortex impact monitoring system

The invention provides a free conflux vortex impact monitoring system comprising a front-end signal acquisition subsystem and a signal preprocessing subsystem. According to the front-end signal acquisition subsystem, a free conflux vortex vibration detection experiment table acts as a detection object, and a vibration signal parallel acquisition channel is set for parallel acquisition of the real-time vibration signals of each target position of the detection object and transmission of the real-time vibration signals to the signal preprocessing subsystem. The signal preprocessing subsystem comprises a filtering and conditioning module, a comparative analysis module and a decoupling separation module. The filtering and conditioning module receives the real-time vibration signals acquired by the front-end signal acquisition subsystem and adopts the method of combination of median filtering and linear self-adaptive filtering. The comparative analysis module receives the real-time vibration signals processed by the filtering and conditioning module and performs comparative operation with a standard signal template so as to obtain the state confidence of the vibration signals. The decoupling separation module is used for acquiring the useful components of the conflux vortex impact vibration signals. Real-time and accurate acquisition of the free conflux vortex formation process impact vibration signals can be effectively realized.
Owner:ZHEJIANG UNIV OF TECH

Nuclear magnetic resonance FID signal noise suppression method based on multilinear singular value tensor decomposition

The invention provides a nuclear magnetic resonance FID signal noise suppression method based on multilinear singular value tensor decomposition, and the method comprises the steps: obtaining a multi-channel signal: enabling one channel to start sampling at an interval of delta t through delay sampling, and obtaining the multi-channel signal; converting each channel signal into a Hankel matrix, forming a third-order tensor, performing Tucker decomposition and processing on the third-order tensor to obtain a third-order tensor, recovering the third-order tensor into a multi-channel signal, performing CP tensor decomposition processing on a second-order tensor X formed by the multi-channel signal, and finally obtaining a high signal-to-noise ratio signal xnew after fusion of multiple communication signals. The method has the advantages that the limitation of a current algorithm under strong noise interference is effectively overcome, meanwhile, the instantaneity and universality of the algorithm are guaranteed, the method can be suitable for instruments such as a proton magnetometer and a nuclear magnetic resonance water exploration instrument, the frequency domain measurement precision and the hydrological parameter accuracy of the instruments are improved, and the precision and accuracy of related geosciences are effectively improved.
Owner:CHINA UNIV OF GEOSCIENCES (WUHAN)

220kV outdoor power transformation equipment electroscope based on unmanned aerial vehicle technology

The invention discloses a 220kV outdoor power transformation equipment electroscope based on an unmanned aerial vehicle technology. The 220kV outdoor power transformation equipment electroscope comprises an unmanned aerial vehicle, a remote control device, an electricity testing device; the remote control device is in wireless connection with the unmanned aerial vehicle and the electricity testingdevice; the electricity testing device comprises an electricity testing needle, an electricity testing device main body and an unmanned aerial vehicle joint; the electricity testing needle and the unmanned aerial vehicle joint are respectively arranged at two ends of the electricity testing device main body; the unmanned aerial vehicle joint is detachably connected with the unmanned aerial vehicle; the remote control device sends a wireless signal to the unmanned aerial vehicle, controls the unmanned aerial vehicle to drive the electricity testing device to move to a location of electrical equipment, and consequently enables the electricity testing needle to be electrically connected with the electrical equipment; the unmanned aerial vehicle sends a detection device to the electricity testing device, and controls the electricity testing device to measure whether the electrical equipment is charged. By application of the technical scheme, an operating environment where operating personnel can be free from directly contacting high-voltage electrical equipment is realized.
Owner:XIAMEN ELECTRIC POWER SUPPLY COMPANY OF STATE GRID FUJIAN ELECTRIC POWER +1

Cap screwing device for food filling bottles

The invention discloses a cap screwing device for food filling bottles. The cap screwing device for the food filling bottles comprises a power distribution box, a sliding rod, a base, a cap screwing sliding frame, a sliding block, a buffering disc, a lifting disc, a transmission ring, a glue spraying disc, a clamping screw awl, a power connecting wire, an electric coil, a pulling rod, a turnover shaft, a spraying hole, clamping sliding plates, a resistance increasing plate, a sliding trough and a suction disc. The cap screwing device for the food filling bottles has the beneficial effects that the cap screwing sliding frame conducts cap screwing on the filling bottles by sliding on the sliding rod, and the high efficiency of work is ensured; people can change the working distances between the cap screwing sliding frame and the filling bottles by pulling and drawing the pulling rod up and down through the lifting disc according to the sizes of different filling bottles, so that cap screwing is conducted on the filling bottles more accurately, and the high accuracy of work is ensured; the cap screwing device can clamp and rotate screw caps through the two clamping sliding plates, and people can freely adjust the clamping distance between the two clamping sliding plates according to the different sizes of bottle caps of the filling bottles, so that it is ensured that the device can conduct cap screwing on the different filling bottles, and the universality of adaptation is ensured; and the device is convenient to operate, stable, firm and reliable, and connection of all components is flexible.
Owner:GUANGXI GAONONG MACHINERY

Multifunctional bearing assembly with constant pressure and positioning functions

PendingCN111022484ACompensation after wear is achievedHas a buffering effectBall bearingsBearing componentsEngineeringSteel ball
The invention relates to the technical field of bearing manufacturing, and discloses a multifunctional bearing assembly with constant pressure and positioning functions. The multifunctional bearing assembly comprises an outer ring; inner rings are assembled in the outer ring, and the two inner rings are assembled in the outer ring in a vertically stacked manner; first arc-shaped grooves are formedin the outer side of the bottom end of the inner ring at the upper end and the outer side of the top end of the inner ring at the lower end, and corresponding second arc-shaped grooves are formed incorresponding positions of the inner wall of the outer ring; and steel balls are assembled between the two inner rings and the outer ring. According to the multifunctional bearing assembly, by adopting the separate design for the inner rings and the integrated design for the outer ring, the effect of compensation after roller path abrasion can be achieved, and the bearing has a certain buffering effect under an impact load; and besides, the inner rings are combined together through an inner race and an elastic gasket, the product achieves pre-tightening through the elastic gasket under a smallload, and the end face of the inner race is in rigid contact with the end faces of the inner rings under a high load to achieve large-load bearing.
Owner:JIANGSU LIANDONG BEARING

Power grid intermittent arc grounding simulation generation device and operation method thereof

The invention discloses a power grid intermittent arc grounding simulation generation device and an operation method thereof. The device comprises a rotating system, a discharging system, a supporting platform system and a control system. The rotating system comprises a first driving motor and a conductive disc; the conductive disc is an insulating disc, and conductive sheets are fixedly arranged at preset equally-divided positions of the insulating disc; the discharging system comprises a discharge electrode; the discharge electrode comprises a high-voltage electrode and a grounding electrode, wherein the first driving motor is fixedly mounted on the supporting platform system, and the first driving motor is connected with the conductive disc through a driving shaft and used for driving the conductive disc to rotate; and the control system is used for tracking the phase of the high-voltage electrode, controlling the rotating speed of the conductive disc based on the tracked phase, and realizing intermittent single-phase arc grounding discharge at a high-voltage alternating current preset position. The device can simulate the single-phase grounding fault, and can be used for carrying out the performance test of protection equipment, fault positioning equipment and the like of a power grid.
Owner:STATE GRID SHAANXI ELECTRIC POWER RES INST +1

Semi-automatic test tube washer

The invention discloses a semi-automatic test tube washer. The semi-automatic test tube washer comprises a liquid conveying pipe, a gear transmission system, a brush rod and a water pump; the gear transmission system comprises a bearing and a tray gear which is arranged on the bearing in a sleeving mode and driven by a motor to rotate around the bearing; the brush rod is hollow to form a channel;the lower end of the brush rod is detachably fixed to the tray gear; a plurality of brush bristles are arranged on the periphery of the brush rod; a liquid outlet of the liquid conveying pipe penetrates through the bearing and then is inserted into the channel; and a liquid conveying port of the liquid conveying pipe is connected with the water pump. The semi-automatic test tube washer achieves semi-automatic washing of test tubes, the washing quality of the test tubes is ensured, and the test tubes are not prone to breaking; the water pump is adopted to control washing liquid and pure water to enter the test tubes in succession, low-efficiency complex operation of manually adding liquid in the washing process can be reduced, and energy can be saved; the brush bristles can ensure the effect that stains on the inner walls of the test tubes are effectively removed, and as the brush bristles are spiral and different in length, the resistance for liquid fed into the tops of the test tubesto flow out of the test tubes can be reduced; and the semi-automatic test tube washer can adopt to the test tubes of different types.
Owner:GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI

Conventional water quality monitoring system and method based on remote sensing waveband combination

The invention provides a conventional water quality monitoring system and method based on remote sensing waveband combination, and the system comprises a hardware layer, a logic layer, a network layer, and an application layer. The hardware layer is connected with the logic layer, the logic layer is connected with the network layer, and the network layer is connected with the application layer; the hardware layer comprises a plurality of satellites, and remote sensing waveband data are obtained through the satellites; remote sensing preprocessing is performed on the remote sensing wave band data through the logic layer, and cloud picture rechecking processing is performed on the filtered remote sensing wave band data by adopting a parallel thread pool to obtain remote sensing image data; the network layer calculates the remote sensing image data based on a Bayesian linear regression model to obtain ground data; and the application layer performs real-time or timed data visualization conversion on the ground data and the remote sensing image data to obtain and store water quality monitoring index data. According to the invention, the universality, accuracy, reliability and stability of the system can be ensured.
Owner:重庆星视空间科技有限公司

Swing delivery transmitting device for candy processing transportation

The invention discloses a swing delivery transmitting device for candy processing transportation. The device comprises a first motor, a conveying belt is installed on one side of the motor, a moving sleeve ring is installed below the conveying belt, a first fixed penetrating seat is installed below the moving sleeve ring, a swing rotary rod is installed on one side of the first fixed penetrating seat, a second fixed penetrating seat is installed on one side of the swing rotary rod, and an placing containing plate is installed below the second fixed penetrating seat, a sliding frame is installed below the placing containing plate, a plurality of supporting sliding blocks are installed on the sliding frame, sliding grooves are formed in the lower portions of the supporting sliding blocks, afirst connecting bolt hole is formed in the placing containing plate, a connecting block is installed on one side of the placing containing plate, and a plurality of second connecting bolt holes are formed in the connecting block. According to the device, the working spacing of the swing rotary rod and the candy conveying belt is changed by siding the swing rotary rod forwards and backwards, so that the transmission of the conveying belt is conducted well and more accurately, and therefore the universality of fitting and the flexibility of using are ensured.
Owner:刘国云
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