31 results about "Rope" patented technology

The invention discloses an anti-tangent, cotangent, secant and cosecant function demonstrating and graph drawing instrument which is made according to a rectangular coordinate definition of an anti-trigonometric function and by combining pushing-turning principles with slider-connecting rod characteristics. The instrument comprises a support, a demonstrating device, a drawing mechanism and a drawing board, the demonstrating device is mounted on a lower slideway and an upper slideway of uprights, and the drawing mechanism is connected with the uprights, the lower slideway, the upper slideway and a guide rod, and connected with the demonstrating device through a soft rope and a pull rod. The above components are combined by adopting different assembly modes, anti-tangent, cotangent, secant and cosecant function relations can be demonstrated visually by only pushing a handle on the push rod, continuous and accurate function graphs can be drawn on the drawing board, paper or any fixed planes, and type forms of anti-tangent, cotangent, secant and cosecant can be demonstrated while corresponding graphs can be drawn. The drawing instrument can be used in a classroom, a drawing room, a construction site and a self-study place for students and is high in drawing efficiency, clear and accurate in graph, simple to operate, convenient to carry and complete in function.

The invention discloses a human motion action analysis method based on time series regression prediction. The human motion action analysis method mainly comprises the steps of rope skipping video acquisition, video data preprocessing, coordinate point acquisition, feature sequence construction, regression prediction model establishment and model calling, collects video stream data in the process of forward shaking and double-leaping of a human body through a mobile phone, records and stores basic information of the target object, including names, genders, ages, heights, weights and made motionnames, constructs a regression prediction model by means of a deep neural network, solves the long-time motion analysis and motion potential discovery problems in the motion training process, and provides a reference basis for motion analysis and training strategy proposal in the motion process.

The invention discloses a rope skipping posture and number recognition method based on computer vision. An ST-CGN model is used for training a skeleton sequence topological graph structure of each frame of image with extracted features; softmax is carried out on the features extracted by the ST-CGN, action classification and confidence are output, and rope skipping action counting is carried out if action classification output is rope skipping; and cosine similarity between the standard action feature vector and the current action feature vector is calculated, and when the cosine similarity isgreater than a preset threshold, it is judged that the current action is a standard action. According to the method, whether the rope skipping posture is correct or not can be judged by using the GCNand cosine similarity algorithm, and the rope skipping number can be calculated by using a maximum value or minimum value method.

The invention discloses an animation playing method and device based on a virtual environment, equipment and a storage medium, and relates to the field of virtual environments. The method comprises the following steps: receiving a rope release signal; obtaining a grid model of the virtual rope and animation parameters corresponding to the grid model according to the rope release signal, the grid model being used for determining a rope contour of the virtual rope, and the animation parameters being used for determining a rope form of the virtual rope; rendering the animation effects corresponding to the animation parameters frame by frame in combination with the grid model, and playing the rope animation in the virtual environment. The grid model and animation parameters of a virtual rope are obtained, the animation effects corresponding to the animation parameters are rendered frame by frame, the virtual rope is displayed in the virtual environment in the form of the three-dimensionalvirtual object, so that the authenticity of the virtual rope in the virtual environment is improved, and the association degree of the virtual rope and the three-dimensional virtual environment is improved.

The embodiment of the invention discloses a jack and a stroke measurement method thereof, relates to the technical field of machinery, and can perform high-reliability stroke measurement under the condition of ensuring the compact structure of the jack. The jack comprises a cylinder body and a piston matched with the cylinder body, and the cylinder body and the piston are sealed to form a piston cavity; a pull rope coding device is fixed on the inner wall of the piston cavity; the pull rope encoding device is connected with the inner wall of the piston cavity in a sealed mode through a sealingmechanism and divides the piston cavity into a first cavity and a second cavity, the first cavity is close to the piston and is sealed by the piston, and the second cavity is far away from the pistonand is isolated from the piston; a pull rope mechanism of the pull rope coding device is located in the first cavity, and a data processing component of the pull rope coding device is located in thesecond cavity; the wire outlet end of the pull rope mechanism is fixedly connected with the piston; and the data processing part is connected with the pull rope mechanism.

The invention discloses a design method of a rope-driven micro-instrument external force indirect detection model. The design method comprises the following steps: establishing a rope-driven micro-instrument system complete kinetic model; establishing a micro-instrument position estimator and a parameter change model thereof under the condition of no external force on the basis of the complete kinetic model of the micro-instrument system; carrying out segmented identification on the micro-instrument position estimator model under the condition of no external force, and establishing a dynamic parameter library of the micro-instrument position estimator under the condition of no external force; establishing a parameter autonomous selection model of the micro instrument position estimator under the condition of no external force; the difference between the output of the micro-instrument position estimator parameter autonomous selection model under the condition of no external force and the position estimation value output by the micro-instrument system complete kinetic model under the condition of external force is calculated, and the difference value is regarded as disturbance causedby the external force to establish a rope-driven micro-instrument external force indirect detection model. The detection model obtained by the design method greatly improves the detection accuracy ofthe external force of the rope-driven micro instrument.

The invention is suitable for the technical field of artificial intelligence, and provides a jump counting method and device, terminal equipment and a storage medium. The method comprises the steps: collecting a rope skipping video image according to a preset image collection period, extracting a key point coordinate of a target key point from the rope skipping video image, and storing the key point coordinate into a key point coordinate set, wherein the abscissa of the key point coordinates is the acquisition time of the rope skipping video image, and the ordinate is the longitudinal height value of the target key point in the rope skipping video image; in response to the fact that a preset fitting condition is met, adopting key point coordinates in the key point coordinate set for fitting to generate a parabola to obtain target parameters of the parabola; and according to the value of the target parameter, determining the adding state of the jump count, and according to the adding state, updating the value of the jump count, wherein the adding state comprises a count increasing state and a count invariant state. In addition, the invention also relates to a block chain technology.

The invention discloses a rope skipping counting method based on an ultrahigh frequency RFID. The method comprises the steps of carrying out the denoising of an RSSI signal W0 in an extracted wireless radio frequency signal, and forming an RSSI signal sequence W1; determining a search length L0 and a search step S of a search interval based on the limit rope skipping speed, searching a valley-peak value in the RSSI signal sequence W1, and judging whether an effective rope skipping behavior exists based on the searched valley-peak value; if the judgment result is that an effective rope skipping behavior exists, putting the valley value and the peak value of the effective rope skipping behavior into a valley value data set and a peak value data set respectively, meanwhile, adjusting the search length L1 of the search interval based on the actual rope skipping speed, continuing to search all the valley values and the peak values of the RSSI signal sequence W1, and putting the valley values and the peak values into the valley value data set and the peak value data set respectively till the rope skipping behavior is finished; and calculating the rope skipping number of the user based on valley values and peak values in the valley value data set and the peak value data set. Rope skipping counting is achieved based on radio frequency signals, and the rope skipping number of the user to be tested can be accurately calculated in the environment with weak light and noisy sound.

The invention relates to the field of virtual imaging, and discloses a rope implementation method, device and equipment based on UE4 and a storage medium. The method comprises the following steps: performing node processing on a virtual rope in a UE4 environment to obtain N rope nodes; according to a preset rope node algorithm, a node constraint relationship among the N rope nodes is calculated, and the node constraint relationship comprises a first constraint relationship of the adjacent rope nodes, a rotation angle constraint relationship of the rope nodes and a second constraint relationship of the interval rope nodes; display constraint calculation processing is carried out according to the first constraint relation, the rotation angle constraint relation and the second constraint relation, and N display nodes corresponding to the N rope nodes respectively are obtained; According to the N display nodes, updating rope nodes in the virtual rope, and generating a constrained virtual rope. Compared with the prior art, stable display of rope simulation in a virtual environment can be achieved, shaking is avoided, and the hardness of the rope can be freely adjusted.

The invention provides a rope missile working authority setting method and system. The method comprises the steps: obtaining an unlocking secret key based on a pre-stored serial number of a micro-control unit carried by a rope missile, and obtaining a ciphertext based on a predetermined encryption algorithm, a preset password table, and the serial number; and determining the working authority of the rope missile based on the comparison result of the ciphertext and the unlocking secret key. The method is applied to the rope projectile assembly, the overall function of inquiring the unlocking secret key according to the serial number can be achieved, and the use requirement during design is completely met. Because the authority setting method provided by the invention is relatively simple, the authority setting method has very outstanding performance in the aspects of use safety and production efficiency.

The invention relates to the technical field of network equipment, and discloses a device for automatically enlarging the placement size when an optical disk is placed in a computer, and the device comprises a housing, the left end of the housing is movably connected with an outer wall, the right end of the outer wall is movably connected with a gear, the right end of the gear is movably connected with a push rod, and the right end of the push rod is movably connected with a moving rod. A connecting rod is movably connected to the lower end of the moving rod, a guide column is movably connected to the lower end of the connecting rod, a compression spring is movably connected to the lower end of the guide column, an anti-resistance mechanism is movably connected to the lower end of the guide column, a rope belt is fixedly connected to the lower end of the guide column, and an ejector rod is fixedly connected to the right end of the rope belt. When the ejector rod moves downwards, a downward pulling force is applied to the limiting block, so that the limiting block moves downwards, the range of the disc surrounded by the limiting block is expanded, and the effect of automatically expanding the range of the placing disc when the optical disc needs to be placed and read is achieved.

The invention provides a flexible rope modeling method based on a linear interpolation shape function, and the method considers two aspects of calculation time and calculation precision. The method overcomes the defects that in the prior art, a concentrated mass method is fastest in calculation speed but low in precision, and a nonlinear finite element method based on absolute node coordinates is long in calculation time, but high in precision and the like, and a nonlinear rope unit adopting two nodes is moderate in calculation time and high in calculation precision, the method has the characteristics of calculation time economy and high precision, can meet engineering application requirements, and is a relatively reasonable choice for flexible interception net rope modeling.

The invention relates to a method and system for generating an image entity contour one-stroke path, and the method comprises the steps: arranging a circle of rope points along the boundary of an image to form a contour rope, and determining the advancing direction of each rope point as the opposite direction of the upper, lower, left or right boundary where the rope point is located; advancing each rope point according to the advancing direction, and changing the contour ropes into rectangles tightly wrapping the outer contours of the entities according to whether any row or column contains the entity points or not; sequentially advancing each rope point of the image boundary according to the advancing direction until the rope points meet the entity points, wherein the obtained contour rope is an image entity contour one-stroke path; creating a self-closed cross-free virtual rope sleeve which can be infinitely and freely expanded and contracted, and sleeving the virtual rope sleeve onthe outer rectangle of the whole portrait; wherein the contour generation process is completely processed by a computer, manual intervention is not needed, the efficiency is high, and the speed is high; the algorithm is simple, the robustness is good, the reliability is high, and errors are not likely to happen; various complex image conditions are well adapted, the fine degree is controllable, and the method is particularly suitable for typesetting area calculation.

The invention relates to a control method and device for connecting two ends of a rope with an interactive object in a UE4 engine, computer equipment and a storage medium, and the method comprises the steps: creating a first object inheriting the interactive object in the UE4 engine, creating a first scene assembly in the first object, creating a rope assembly in the first scene assembly, generating a second object in a BeginPlay event of the first object, creating a second scene assembly and an arrow assembly in a second object, and subtracting the rope length of the rope assembly from the first position of the first object to obtain a second position of the second object; and determining that the second object is in a suspended state and a grabbed state, and controlling the first object, the rope assembly, the second object and the arrow assembly according to the suspended state and the grabbed state, so that the use of the rope assembly can meet simulation VR application development. According to the method, the simulation effect that interactive objects are arranged at the two ends of the rope assembly can be simulated.

The invention provides an interaction method and device based on a color rope, a medium and electronic equipment. The interaction method comprises the following steps that: a connecting rope result information set submitted by any member terminal in each group within the interaction time of each group is received, wherein the rope connecting result information set is used for storing connecting rope connection information associated with a fixed node and determined by the member terminal based on a preset prompt graph of the corresponding group; based on the connecting rope result informationset, a preset rope connecting rope scoring rule and a preset fixed node information set, scoring results of the corresponding groups are calculated, wherein the fixed node information set is used forstoring information of the fixed nodes which can be connected with a plurality of connecting ropes in the corresponding groups. According to the interaction method based on the color rope, the submitted connecting rope result information set is automatically scored through the connecting rope result information set, the preset connecting rope scoring rule and the preset fixed node information set;the error rate of manual scoring is reduced, the scoring accuracy is improved, the training progress is accelerated, and the training quality is improved.